Construction scheme of belt gallery

Construction scheme of steel structure engineering of conveyor belt corridor in transfer station

catalogue

I. Basis for compilation

Second, the project overview

Third, the construction deployment

Four, steel structure production and construction

Verb (abbreviation of verb) Installation and construction of steel structure

Six, the construction progress plan

VII. Guarantee measures to ensure civilized and safe construction

Eight, quality assurance measures

I. Basis for compilation

1. Bidding documents.

2. Various construction technical specifications and related documents.

3, according to the requirements of the owner and the requirements of the contract documents.

4, according to our company's technology, equipment, personnel quality and other conditions to take scientific methods, advanced management, optimized configuration, perfect measures to prepare.

5, according to the characteristics of this project to take reasonable construction scheme and construction management measures.

Second, the project overview

This project is the reconstruction project of the second raw material yard around No.3 Sintering Plant of Anyang Iron and Steel Co., Ltd., including steel structures of G 108 and G205B belt corridors, local steel structures of G 107 and G205A belt corridors, steel structures of G204 belt corridor and 18# transfer station.

The total engineering quantity is about 600 tons.

Third, the construction organization

3. 1 project organization and management

(1) Organization of steel structure project management department

owner

2 The proposed functions of steel structure installation are as follows:

(1) Establish the installation project management department with the project manager as the core.

(2) Set up a steel structure construction technical team headed by the project chief engineer to study and solve major technical problems that may occur in the process of design, production and installation.

(3) The main functions of the installation project management department include:

A. prepare the construction quality plan of this project.

B. Prepare the construction organization design and special construction scheme for individual projects.

C. assist the general contractor in all site preparations.

D. Solve all problems in steel structure drawings, and be responsible for implementing drawing changes and technical negotiations.

E. solving technical problems in steel structure construction.

F formulate and control various construction progress plans in steel structure construction.

G. quality control and inspection during manufacturing and installation.

H. responsible for the collection and management of technical data of steel structure.

A, closely cooperate with the construction parties, to do a good job of service.

J regularly participate in the project coordination meeting organized by the owner and the supervision unit to solve various problems in construction in time.

K. Strengthen drawing refinement. Using CAD technology to refine the nodes of steel structure construction drawing.

(3) Labor organization of steel structure construction

3.2 Project staffing

(1) Manager:

① 1 project manager

② Deputy Project Manager 1 person.

③ 1 engineer.

④ 1 quality director.

⑤ Safety Officer 1 person.

2 steel structure construction personnel organization list

Quantity of work quantity of work quantity of work quantity

1 builder 28 assembler 4

2 technicians 2 9 installers 10

3 Quality Engineer 2 10 scaffolder 2

4 safety officer 2 1 1 measures 1

5 Machining 6 12 drive 4

6 welder 15 13

7 assembler 12 14

3.3 Configuration of Construction Machinery and Equipment

Serial number, product name, specification, unit quantity and purpose

1 steel wire rope φ 30 hoisting of several structures

2 buttons 10t, 6t 20 pieces of structure hoisting

Treatment of 8-color steel tile with 3-pocket belt

4 lifting fixture lifting 3 tons of 6 steel beams

5 adjustable wrench 8-20 inch 12 fastening bolt.

6 Manual hoist 1-2 tons 20 Temporary fixation

7 angle grinder φ 125 2 sets for grinding weld.

Eight 500 A welding machines and 20 welding machines.

9 8 times structural installation of pulley sleeve

10 crane 16t platform 2 structural installation

1 1 Structural installation of crane 50t platform 2

12 structural installation of crane 25t platform 2

13 semi-automatic gas cutting machine platform 15 blanking

14 CO2 gas shielded welding table 15 welding

15 steel leveler platform 2 straightening

16 table turntable 4 drilling

17 8-layer magnetic drill

18 welding of submerged arc welding machine platform 4

19 30t flat platform 2 transportation

20 Traction and site leveling of loader platform 2

Four, steel structure production and construction

4. 1 There are a large number of steel structural members in this project, and the engineering quantity is large. Adopt semi-automatic cutting trolley to ensure the size and quality of cutting. Submerged arc welding is adopted for the welding of H-beam panels and webs to ensure the welding quality, and sandblasting is adopted for the rust removal of components.

The process flow is as follows:

Non-hole-making parts for marking plates

Material number blanking line drawing line

Blanking and straightening blanking and blanking.

Straightening groove processing straightening straightening

Groove processing and hole making

Overall inspection of assembly, shot peening, cleaning, assembly, welding and straightening

weld

Calibration paint number package

shaped steel

The specific construction technology is as follows:

1. Material confirmation

1. 1 This procedure is part of material inspection, including the confirmation of the selected models and specifications of the project and the quality inspection of materials.

1.2 quality inspection standard:

Should comply with the design requirements and the provisions of the current national standards.

1.3 test method:

Check the steel quality certificate, and conduct re-inspection if necessary. Check the specifications with steel tape measure and caliper.

1.4 Fill in the material inspection sheet.

underline

2. 1 Before lofting and marking, the materials shall be placed on the platform and leveled. If the site conditions cannot be leveled, a temporary lofting platform should be built.

2.2 Pay attention to reserve production allowance and welding shrinkage allowance during production; Allowances for cutting, beveling and end machining; Installation reserved size requirements.

2.3 Before marking, the bending and deformation of materials should be corrected.

2.4 Marking method:

Draw a vertical line at the right angle of the material with the right angle line method. The uneven edge is required to be at least 10mm outside the vertical line. Based on the vertical line, draw the blanking dimension line of the parts, and indicate the size data. If the semi-automatic cutting machine is used to cut the blanking, the trajectory line should be drawn at the same time, and the cutting line and trajectory line should be marked to avoid cutting errors.

2.5 See Code for Construction and Acceptance of Steel Structure Engineering for allowable deviation of lofting and formwork.

2.6 After the marking is completed, check the correctness of the dimensions and control the deviation. Inspection method: use steel rule to detect.

cut

3. 1 Material cutting shall be carried out on the cutting platform, and it is forbidden to cut directly on the stacked materials.

3.2 Semi-automatic cutting trolley is used for steel plate blanking. Before blanking, the rust and dirt on the cutting surface should be removed to keep the cutting piece clean and flat. After cutting, slag and splash should be removed. Operators should master the use methods and operating procedures of mechanical equipment and adjust the optimal values of the optimal parameters of the equipment. In order to prevent cutting deformation, the connection point left in the middle of the cutting seam should be repaired and polished even after manual cutting.

3.3 The shearing surface or cutting surface of steel shall be free of cracks, slag inclusion and delamination.

3.4 See Table 7.2.2 of Code for Construction and Acceptance of Steel Structure Engineering (GB50205-200 1) for the allowable deviation.

Quality inspection method: visual inspection or inspection with magnifying glass and steel rule.

4. Groove opening

4. 1 The welding seam of the upper and lower wing plates and the web plate shall be bevelled, and the bevel angle shall be small to prevent deformation on the premise of ensuring the penetration. The angle of groove shall be determined according to the actual situation with reference to the requirements shown in the figure. Generally, the single-sided groove should be less than 30 degrees. When the plate thickness is less than 25mm, the single-sided groove should be given priority to, leaving no blunt edge. Reduce the penetration of welding materials in the welding zone to reduce welding deformation and stress.

4.2 According to the thickness of the material and the angle of the groove, calculate the cutting amount, draw the cutting line on the material, and cut it after it is verified.

4.3 Semi-automatic cutting machine is the main way to open the groove. Some short weld grooves can be cut by hand, but the surface of the cut groove should be smooth and the angle deviation should be small.

4.4 When cutting, pay attention to that the angle of the Qiang mouth should be equal to the angle of the groove, and the groove cutting should be completed at one time as far as possible to avoid artificial pause and collision in the cutting process, so as to ensure the quality of the groove.

join together

5. 1 Before splicing, the materials shall be laid flat, and the straightness of the materials in the length direction shall be checked with ink lines.

5.2 When splicing, one side should be connected with the other side as a benchmark, and it is forbidden to combine both sides at the same time, so as to avoid the cumulative deviation being released.

5.3 When splicing materials with equal thickness, use a steel ruler to check that the dislocation is less than 0. 15 times the thickness of the plate and less than 2mm, adjust it with a crowbar or other tools, and fix it by spot welding after it meets the requirements.

5.4 Materials with different thicknesses shall be inspected with a square ruler and a supporting ruler, and adjusted with a crowbar or other tools to ensure that the differences between the front and back sides meet the requirements of the diagram.

weld

6. 1 After spot welding is fixed, welding can be carried out. Submerged arc welding and gas shielded welding are generally used, and the welding materials are determined according to the materials:

Q235 adopts welding wire: H08A covered electrode is J422 (E4303). The flux is HJ43 1.

6.2 Before welding, the oil, rust and impurities in the weld area and its vicinity within at least 50 mm shall be removed to ensure the welding quality. Arc-starting and arc-falling plates must be set at both ends of submerged arc welding seam, and the arc-starting and arc-falling positions of the weld seam must be on the arc-starting and arc-falling plates, and the length of the arc-starting and arc-falling plates shall not be less than 50 mm.

6.3 According to the weld thickness of the material, select the following parameters for welding.

Actual throat

Diameter of welding wire (mm)

Welding current (mm)

(a) arc voltage

(5) Welding speed

(m/h)

8 4 550-600 32-34 30

10 4 650-700 34-36 23

12 4 700-750 36-38 20

6.4 Due to the long upper and lower wing plates and webs, the pole beam should be used when overturning to prevent deformation.

6.5 See Table A.0.1in Code for Construction and Acceptance of Steel Structure Engineering (GB50205-200 1) for the allowable deviation of welds; A.0.2A.0.3

The weld surface shall be free of surface porosity, slag inclusion, arc pit, crack, flash and other defects.

6.6 For full penetration welded structures, carbon arc gouging shall be carried out on the back of the weld.

6.7 For welds requiring flaw detection, the weld surface shall be cleaned and qualified by flaw detection.

7. Inspection by flaw detection

Parts shall be inspected. Before inspection, the foreman should cooperate with the quality engineer to check the appearance quality of the weld. After passing the inspection, the foreman shall fill in the inspection order according to the requirements of drawings and standards, indicating the workpiece number, inspection grade and standard, and the inspectors shall conduct inspection. Unqualified parts must be repaired.

put together

8. 1 The deformation of the workpiece should be corrected before assembly and should be within the control deviation. The rough contact surface should be free of burrs, dirt and sundries, so as to ensure that the components are closely combined and meet the quality standards. Appropriate tools and equipment, such as right-angle steel ruler, should be provided during assembly to ensure sufficient accuracy after assembly.

8.2 Assemble H-beam by hand.

8.2. 1 Draw an assembly line on the workpiece and check it at any time during assembly.

8.2.2 The welding materials used in spot welding shall match the weldment, the thickness of the weld shall be 2/3 of the design thickness and not more than 8mm, the length of the weld shall not be less than 25mm, and the position shall be within the weld bead.

8.2.3 Pre-assembled parts must be inspected and determined whether they meet the requirements of drawing size and accuracy of parts.

8.2.4 When assembling and molding, the components shall be carried out in a free state.

8.2.5 When the workpiece is turned over, it is necessary to check whether the spot welding is firm and use the polar beam for operation.

8.2.6 See Table C.0. 1 in Code for Construction and Acceptance of Steel Structure Engineering (GB 50205-200 1) for the allowable deviation.

Quality inspection method: use a ruler and a square ruler to check.

9. Welding:

9. 1 The welding parameters shall be mastered by the welder according to the splicing welding process, but the root must be removed. The height of fillet weld of one-sided welding shall not be less than half of the thickness of web. When the weld is concave, the thickness of the weld should be ensured and the height of fillet weld should be increased appropriately.

9.2 The height of fillet shall conform to the provisions in Table A.0. 1 in the Acceptance Standard for Steel Structure Fabrication Quality; The deviations in A.0.2 and A.0.3 are required.

9.3 The welding process is as follows:

9.3. 1 Put the assembled H-beam on the 45-degree ship frame for welding.

9.3.2 Before welding, the oil, rust and impurities in the weld area and its vicinity within at least 50 mm shall be removed to ensure the welding quality. Arc-starting and arc-falling plates must be set at both ends of submerged arc welding seam, and the arc-starting and arc-falling positions of the weld seam must be on the arc-starting and arc-falling plates, and the length of the arc-starting and arc-falling plates shall not be less than 50 mm.

9.3.3 The welding sequence shall be symmetrical staggered welding of four longitudinal seams to reduce deformation.

9.3.4 In the process of welding, the position of weld shall be adjusted at any time to avoid deviation of weld.

9. 3. 5h- Turn the cross beam with the pole beam, and pay attention to the spot welding without weld seam again before turning, so as to ensure firmness.

10. Calibration

10. 1 Equipment used: flange straightener.

10.2 The operators are familiar with the process content and master the equipment operation procedures.

10.3 Adjust the straightener spacing according to the external dimensions of the parts.

10.4 the operation of the component must be carried out continuously from one side to the other, and it is forbidden to straighten it in a large range at a time due to overload, and it should be straightened several times.

10.5 during the straightening process, the straightening amount should be measured at any time to prevent the straightening phenomenon.

10.6 When the local standard exceeds the standard, it shall be straightened as a whole and then adjusted in sections, and at the same time, it shall be adjusted within a small scope to avoid dead bending.

10.7 After the rectification is completed, self-inspection shall be conducted, and the allowable deviation shall meet the deviation requirements in Table C.0. 1 in Code for Construction and Acceptance of Steel Structures. Quality inspection method: use square ruler, steel ruler and visual inspection.

1 1.

① Equipment used: radial drilling machine.

② Quality inspection standard:

The allowable deviation between bolt holes and hole spacing conforms to the relevant provisions in Tables 7.6. 1 and 7.6.2 of Code for Construction and Acceptance of Steel Structures.

③ Quality inspection method: use ruler, steel rule, caliper and visual inspection.

12. Stiffening plate assembly

12. 1 Draw an assembly line on the web first, and then assemble the stiffening plate after inspection.

12.2 when the rib plate and wing plate need to be jacked up, jack or inverted chain should be used for jacking to ensure jacking.

13. End cutting

13. 1 After welding H-beam columns and beams, the ends shall be cut flat.

13.2 The equipment used is a semi-automatic cutting trolley. If the semi-automatic cutting trolley cannot be used for some parts due to conditions, manual cutting can be used, but the cutting seam must be straight and the cutting marks should be smooth.

13.3 The allowable error of end cutting conforms to the relevant provisions in Table 8.4. 1 in Code for Construction and Acceptance of Steel Structures.

14. Overall dimension inspection

The overall dimensions of finished steel columns and beams made of 14. 1 should be checked. According to the items specified in Tables C.0.3 and C.0.5 of Code for Construction and Acceptance of Steel Structures, punch holes at the reference points of various sizes to check the sizes of each part.

14.2 over-standard defects found in rectification.

14.3 the allowable deviation of dimensions after overall inspection shall comply with the relevant provisions in tables C.0.3 and C.0.5 of Code for Construction and Acceptance of Steel Structures.

15. Rust removal

15. 1 Special derusting equipment is used for derusting, and sand blasting can improve the fatigue strength and corrosion resistance of steel. The surface hardness of steel is also improved in different degrees, which is beneficial to the adhesion of paint film without increasing the extra coating thickness. Abrasive used for derusting must meet the quality standards and technological requirements, and the relative humidity of the construction environment should not be greater than 85%.

15.2 The connecting materials between partitions shall be separately sandblasted and derusted after the derusting of partitions is completed.

15.3 after rust removal, the steel surface should be cleaned with tools such as brushes before the next working procedure can be carried out. If the steel surface after derusting is qualified, it needs to be derusted again.

15.4 derusting quality shall meet the requirements of drawings and the relevant provisions of Code for Construction and Acceptance of Steel Structures.

16. Pigment

16. 1 Apply the first primer on the surface after the rust removal inspection of steel is qualified.

16.2 Generally, it is stored in the factory building after rust removal, and can be primed within 24 hours. If stored outside the factory, the primer should be painted in shifts.

16.3 the use of paint should meet the design requirements. After the primer is dried, the top coat should be painted to ensure that the coating thickness meets the design requirements. The paint should be uniform in the process of brushing and will not sag.

16.4 If the connecting materials cannot be sprayed after assembly, the primer must be sprayed before assembly.

16.5 when painting unfinished parts, the parts that need to be welded in the future should be set aside to ensure the welding quality in the future.

16.6 if there is a mark on the component, it should be registered by a special person before painting, and it should be re-marked in the corresponding position after painting.

16.7 coating quality should meet the requirements of the drawings and Code for Construction and Acceptance of Steel Structures? The relevant provisions of the.

17. Packaging, transportation and on-site storage

17. 1 component number Before packaging, all symbols should be converted into part numbers. Indicate it on the design drawing, and mark the specified parts of the parts with pen (paint) or adhesive tape when packaging.

17.2 pay attention to the protection of parts and coatings during handling, and provide appropriate protection for parts that are easy to collide.

17.3 if the parts are deformed and damaged after handling, they should be repaired in time to ensure that the parts are intact before shipment.

17.4 during transportation of components, measures should be taken to avoid deformation during transportation of components.

17.5 After the components are transported to the site, they should be reasonably stacked to avoid extrusion and collision deformation of the components on site.

Verb (abbreviation of verb) Installation and construction of steel structure

5. 1 construction preparation

5. 1. 1 Before the construction of steel structure engineering, the constructors in each process shall be provided with necessary on-the-job training and technical, quality and safety disclosure to prevent safety and quality accidents.

5. 1.2 steel structures need to be inspected after entering the site, and they should be piled up reasonably, so as to facilitate the smooth installation of components after entering the site and minimize secondary transshipment.

5. 1.3 Before site hoisting, play a crosshair on the embedded parts at the foot of the column to control the elevation. The site should be leveled and compacted, without water accumulation, and the driveway should be reserved.

5.2 Acceptance of Column Foundation

Check the vertical and horizontal center line and elevation of column foundation, and complete all software data according to relevant codes and standards and the requirements of supervision engineer.

Allowable deviation between supporting surface and anchor bolt (mm)

Allowable deviation of the project

Support surface elevation 3

Levelness l/ 1000

Center deviation of anchor bolt is 20

Bolt exposure length 20

Thread length 10

The deviation of the reserved hole center is 10.

5.3 Steel structure installation

5.3. 1 Preparation

(1) Main hoisting tools: steel wire rope, brown rope, snap ring, rope clamp, chain, jack, wrench, crowbar, steel rule, wire pendant, theodolite, level, spirit level, suspender and inclined pad iron.

(2) For upright ladders, each upright should be equipped with a pair.

(3) The vertical and horizontal center lines and elevation lines of 0.00 m will pop up on the steel column. Before installation of steel column, dust, oil stain, dirt and other sundries attached to its surface and cup bottom should be removed.

Installation sequence:

Color plate of steel column truss with corridor

Positioning and Fixing of Steel Columns

(1). After the steel column is hoisted above the foundation, the operators should stand in their respective positions, stabilize the root of the steel column and get in place.

(2) Use a crowbar to pry to align the center line of the steel column with the center line of the foundation. To find the timing, first find the two facets, and then translate the steel column to make it flush with the big facet.

(3), steel column alignment, including plane position, verticality and elevation alignment, elevation correction mainly through the level comparison benchmark and steel column elevation deviation with inclined shim.

(4) Adjust the plane position correction by comparing the axis of steel column with the center line of foundation.

(5), verticality correction through two theodolite correction.

(6) After the steel column is aligned, it shall be fixed firmly with anchor bolts.

5.3.4 Installation allowable deviation

Inspection method of allowable deviation of project

The deviation between the center line of the steel column base and the positioning axis is 5.0. Check with messenger wire and steel rule.

Benchmark elevation of steel column shall be checked by crane beam +3.0 column with level.

Column without crane beam -5.0

Bending and rising h/ 1200,

≤ 15.0 Check with theodolite or stay wire and steel rule.

pillar; mainstay

axis

line

low

straight

Single-layer column H ≤ 100 MH/ 1000 shall be inspected with theodolite or stay wire and steel rule.

H> 65438+100mh/1000 and ≤25.

Multi-column and single-column H/ 1000 and ≤ 10

Multi-section column ≤ 35

8.3.7 Installation of beams on each floor

Before each layer of beam is installed, a temporary platform is set up with angle steel and frame tower. The platform should be solid and reliable, and pay attention to the installation quality of nodes.

Positioning and Fixing of Truss

(1), the truss is long and must be assembled on site and hoisted as a whole. Because the assembled truss is 9 meters wide, two 50-ton crane stations must be hoisted at both ends.

(2) After the truss is hoisted above the steel column, the operators should stand in their respective positions, hold the truss ends steady and get in place.

5.3.6 Steel ladders shall be installed on each floor.

Steel ladders on each floor should be installed from bottom to top in turn. Steel ladders shall be numbered and stacked neatly before installation, and the installation shall meet the requirements of drawings and relevant standards.

5.3.7 Installation of wall purlin

Because purlins are prone to bending deformation and deflection, purlins entering the site must be neatly stacked. It is forbidden to pile other components on the purlin. During construction, it should be adjusted and installed. After purlin installation, support should be installed to adjust the lateral bending of purlin. After meeting the requirements, tighten the bolts and spot weld the fixing nuts. After purlin installation, install horizontal support and tie rod. Before hoisting, check the serial numbers, geometric dimensions and hole spacing of horizontal supports and tie rods on the ground. If the hole spacing is wrong and needs to be modified, the original hole must be welded and blocked. After installation, tighten the bolts and spot weld the fixing nuts.

5.3.8 Installation of color steel plate

(1) The fabrication and installation of the metal panel shall conform to the requirements of the construction drawing design and the regulations. When the design needs to be modified, the design unit shall agree and sign the design change document.

⑵ When loading the metal panel, the plates and accessories should be packed according to the model and tied firmly to prevent the metal surface from being worn or scratched. Metal plates are generally transported by large trailers, and ordinary trucks can also be used. Means of transport are usually selected according to the length of the board. During transportation, the metal plate should be firmly tied to the car, and temporary fixing measures such as adding wooden wedges should not be adopted to avoid loosening the plate when the car body shakes. When transporting ultra-high and ultra-long plates, attention should be paid to the transportation height to prevent overturning. For plate binding on vehicles, it is best to choose angle steel or angle iron with the same plate length and place them at the corners on both sides of the top plate, so as to evenly distribute the binding pressure and avoid damage (indentation) to the edge of the plate due to concentrated pressure. When transporting for a long distance or in bad road conditions, the metal plate must be flat. During transportation, the fulcrum length of metal plate should not be greater than1.0m. When it is greater than 1 ~ 2m, the selected length of plate should be bound at the tail as a whole to avoid excessive deflection caused by wave impact at the rear of the car. After the goods arrive at the site, they should be stored in the construction order. The floor where the plates are stacked should be kept flat as far as possible, and then the polystyrene foam with the same area should be padded, so that the bottom of the sandwich panel can contact the cushion as evenly as possible, and the stacking height of the plates can be ensured to be within 2~3 meters without deformation or damage.

(3) The main machines and tools used for plate installation shall be complete, and the main materials and accessories shall be complete; Measuring tools should be customized and verified. If it does not meet the requirements, it should be replaced in time. Before installing the metal panel, the construction scope should be made clear, and whether the ground, wall foundation and other related projects meet the technical requirements of construction drawing and wall installation should be checked.

(4) When installing the wallboard, it shall be constructed according to the layout. Plate splicing should be smooth and tight. Plate joints should be uniform and tight, and the wall should be vertical. In the vertical direction of the wall, try to use plates with the same height or longer size as the wall to minimize the overlap of the wall. If the wall needs to be lapped, the lap length should not be less than 50mm, and the outer lap can be pressed downwards, while the inner lap can be pressed upwards. Rivets shall be used for connection, and the transverse spacing of rivets shall not be greater than 300 mm.

5] When conditions permit, the roof panels should not overlap. If it is necessary to overlap, it should be overlapped along the slope length direction, and the overlap must fall on the purlin or support. When the roof slope is less than or equal to 10%, the lap length should not be less than 300mm, and when the roof slope is greater than 10%, the lap length should not be less than 200mm. The overlapped steel plates shall be connected by nails or rivets, and the distance between them shall not be greater than 300 mm All overlapped parts shall be sealed with sealant or waterproof material, and waterproof measures shall be taken for exposed nail heads. The transverse lap joint of roof board (corrugation) is consistent with the dominant direction, and waterproof sealing material must be set at the lap joint.

Six, the construction progress plan

1. construction period: the construction period of this project is days (see attached page for construction schedule).

2, in order to speed up the construction progress, finish the construction task on time, on the premise of ensuring the engineering quality and safety in production, the following measures are formulated:

Carry out project management in an all-round way, closely cooperate with the owner, supervisor and designer, make full use of the construction experience of managers and technicians with similar engineering experience, comprehensively manage the production and installation of steel structures from the aspects of planning, organization, technology and quality, unify and coordinate various construction relationships, and ensure the realization of the overall progress plan organizationally. Carefully prepare for construction, give full play to the role and enthusiasm of various functional departments, and take responsibility to people, especially to ensure that the main materials, auxiliary materials and construction machinery are delivered to the production and construction site with good quality and quantity as planned. Strengthen machinery management, maintain all kinds of processing and installation machinery and equipment, and ensure that the machinery is in good condition. And the responsibility of maintenance personnel lies in people, and a reward and punishment system is established to ensure the integrity of machinery with people's good work, thus ensuring the completion of tasks.