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Production plant steel structure installation and construction plan

1. Project overview

1. Construction method

For the steel structure installation of this project, first Review the axis line of the concrete foundation and the elevation of the top surface of the foundation. Use the method of piece-by-piece lifting. First lift all steel columns. After correction and fixation, lift 1 to 10-axis steel beams in sequence, followed by 11 to 20-axis steel beams. Adjust as you go. , then install and fix, and finally hoist the roof support and purlin system.

2. Construction sequence

The on-site hoisting is divided into two construction units, each unit performs independent operations. One unit uses a 100-ton crane, from 10 axles to 1 axle. It is hoisted from east to west. The second unit is hoisted from west to east using a 100-ton crane from axle 11 to axle 20. The hoisting sequence is shown in the hoisting plan.

3. Preparation work before installation

3.1 Construction of column foot bolts: Review the column foot positioning axis for civil foundation construction and bury the anchor bolts. In order to ensure the accurate positioning of the anchor bolts, the anchor bolts are positioned and fixed with steel template hole sleeves, and they can be fixed after repeated verification. The exposed parts of the anchor bolts are wrapped with plastic sheeting to protect them.

3.2 Prepare the installation plan and component supply plan, and organize the construction.

3.3 Inspect steel components: Steel components should have factory certificates when they leave the factory. Check and review the components according to the drawings before installation, and transport the components to the installation range in accordance with the installation sequence. Under conditions that do not affect the installation, Try to place the components below the installation location to ensure convenient installation.

3.4 Standard Section Installation Process

3.5 Installation Quality Standard

Project Name Allowable Deviation Verticality Single Section Column Building Overall H/100 and ≤10mm Standard High beam surface L/1000 and ≤10mm column top ≤5mm building height ±n (△n △n △w)

4. Installation and construction technology

4.1 Steel column installation: hoisting Before hoisting, first determine the position of the lifting point of the component, determine the binding method, and take protective measures during hoisting. After lifting the steel column, straighten it when the column foot is about 30-40CM away from the anchor bolts, align the mounting holes of the column foot with the bolt, and slowly drop the hook into place. After preliminary calibration, when the vertical deviation is within 20MM, tighten the bolts and temporarily fix them to decouple.

4.2 Steel beam hoisting: Steel beam hoisting is carried out after the column review is completed. When hoisting steel beams, two-point symmetrical binding is used to lift and install them in place. After the steel beam is hoisted, it is slowly put into position when it is 100mm away from the column datum. After the steel beam is hoisted and in place, the docking adjustment and correction are performed, and then the connection is fixed. When hoisting steel beams, use theodolite to calibrate them as they are lifted, and any deviations can be corrected at any time.

4.3 Installation of wall purlins: Purlins have smaller cross-sections and lighter weights, and should be hoisted using one hook for multiple hoisting or piece hoisting. The correction of purlins mainly involves the spacing size and their own straightness. The spacing check uses a sample rod to move back and forth between the purlin members. If there is an error, loosen or tighten the bolts to correct. The straightness is checked and corrected with guy wires and steel rulers, and finally fixed with bolts.

5. Installation correction

5.1 Steel column correction: Use a theodolite or a hanging hammer to check the verticality of the steel column. When there is a deviation, use a jack to correct it. Use a jack to correct the elevation. Raise the base slightly, then increase or decrease the thickness of the pad. Tighten the anchor bolts immediately after the column feet are calibrated correctly. After the overall steel column is calibrated correctly, pour fine stone concrete under the column foot base to fix it.

5.2 Steel beam correction: Measurement and correction of the steel beam axis and verticality. The correction is carried out using jacks and reverse chains. Fix it immediately after correction.

6. Construction of high-strength bolts

6.1 High-strength bolts must have a material certificate (quality guarantee certificate) before construction and must be retested before use.

6.2 High-strength bolts must be properly managed and kept by dedicated personnel and must not be thrown around. During the installation process, bolts must not be damaged or contaminated with dirt to prevent changes in the torque coefficient.

6.3 High-strength bolts must be moisture-proof and corrosion-proof.

6.4 When installing bolts, use a bald crowbar and punch nails to align the screw holes of the upper and lower (or front and rear) connecting plates so that the bolts can be inserted freely.

6.5 If the error in the screw holes of the connecting plate is large, it should be checked and analyzed and dealt with accordingly. If the adjustment of the screw holes is ineffective or the remaining partial screw holes are not in the correct position, you can use an electric reamer or a manual reamer to drill. hole.

6.6 On the same connection surface, high-strength bolts should be inserted in the same direction, and high-strength bolts should be tightened at the end of the day after installation.

2. Installation of profiled color plates on the wall

1. Preparation before construction

1.1 Before the construction and installation of the profiled steel plate enclosure, customize the corresponding construction Drawings, and organize the design according to the design documents, and provide technical training and safety production explanation to the construction personnel.

1.2 Check the specifications and quantities of various materials in detail according to the documents. Damaged profiled steel plates and flashing plates should be repaired and replaced in time.

1.3 All types of construction equipment should be complete and functioning properly.

1.4 Review the installation accuracy of steel components related to the construction and installation of profiled steel plates, remove the installation weld coating and spatter of purlins, and apply anti-rust paint for anti-corrosion treatment.

2. Construction process of profiled color boards: Installation of wall panels starts from one end according to the position of the purlins. The boards must be tightened and then fixed with screws. The joints of the wall panels should be waterproofed. . When installing profiled steel plates, their position should be adjusted and fixed while laying.

3. Under the conditions of transportation and hoisting permission, long-sized plates should be used to reduce joints and improve thermal insulation performance and waterproof effect.

3.1 The profiled steel plates are fixed, and every two plates have an overlap in the transverse wave. The overlapping surfaces are sealed with sealing strips, then sealed with waterproof sealant, and fixed with self-tapping screws and purlins.

3.2 There should be no less than 3 screws at the end of each board. If the middle support is at a purlin distance greater than 3 meters, there should be at least one self-tapping screw connection.

3.3 The plates are overlapped on the purlins to ensure the required overlap length. The overlapping parts are connected with rivets and applied with waterproof sealant, and the exposed nail heads are coated with sealant.

3.4 The overlap of the edged steel plates should be in the leeward direction as much as possible, the overlap length should be greater than 20-50 mm, and the rivet spacing should be less than 500 mm.

3.5 self-tapping rivets are set on the wave crest for waterproof treatment.

3.6 Once the colored coating is scratched or rusted, it should be repaired with the corresponding series of paints.

3. Safety construction measures

1. Set up a safety foreman at the construction site to implement and manage on-site safety measures, and unify on-site construction personnel, on-site mechanical equipment and on-site electricity use manage. Special agents required to participate in construction must be trained and certified. Conduct safety technical briefings for all construction personnel before construction. Personnel entering the construction site must wear safety helmets and non-slip shoes. Electricians and electrical welders should wear insulating shoes, and safety belts must be fastened when working at heights.

2. The tools, machinery, and equipment used should be inspected before work, and the safety devices should be complete and effective.

3. The operating surface should have a reliable platform to protect the body, and the operation should be carried out after inspection. The binding method of components should be correct, and anti-slip measures should be taken at lifting points. Tools and materials used for high-altitude operations should be placed in a safe place and are not allowed to be placed casually.

4. When lifting steel components, the lifting or lowering should be smooth and avoid emergency braking or impact. Dedicated personnel are responsible for command, and the signals are clear, loud, and unambiguous. Illegal operations are strictly prohibited. After the components are installed, their quality must be checked to ensure that they are safe and reliable before being unfastened. Work must reach a safe position every day before calling it a day.

5. The mechanical and electrical equipment, gate boxes, and welding machines at the construction site should have reliable rainproof measures. The operation of electrical appliances must be carried out by professionals, and operation by non-professionals is strictly prohibited. The electric welding machine uses strict safety operating procedures. The primary wire must not exceed 2 meters, and the secondary wire must not be broken or exposed.

6. Safety facilities are set up uniformly by dedicated personnel in accordance with regulations, and others are not allowed to dismantle them at will.

When it needs to be dismantled due to work needs, permission must be obtained from the relevant personnel. It must be restored in a timely manner afterwards and safety personnel must carefully inspect it.

7. Ensure safe use of electricity. Professional electricians are responsible for the dismantling of all electrical equipment and on-site lighting. All power tools used must be equipped with leakage protectors.

8. Focus on controlling high-altitude operations. It is strictly prohibited to drink or fight during work. Hand-held tools should be fastened with safety lanyards to avoid straight and vertical crossing operations.

9. Fire protection must be ensured, and all operations should be used correctly and in accordance with regulations.

10. When installing the roof, arrange the safety net and set up the railings.

11. Adhere to the pre-shift safety meeting system and explain the day's work arrangements and safety precautions.

12. Conduct regular safety inspections to prevent and control unsafe factors in accidents.

13. Lifting instructions must be decisive and instructions must be concise and clear.

14. Strengthen on-site security and pay attention to fire and theft prevention.

15. A safety cordon is set up within the hoisting operation area, and non-operators are prohibited from entering.

16. All safety activity records and documents must be complete.

IV. Construction Measures in Rainy Season

1. During construction on rainy days, temporary protective sheds should be set up to prevent rainwater from falling on the hot welds. If the welding part is relatively moist, it must be wiped clean with a dry cloth and dried with an oxyacetylene flame before welding to keep the joint dry and without residual moisture.

2. During hoisting, if there is water on the component, it should be cleaned before installation, but the coating should not be damaged. When installing high-strength bolt joints, the friction surface of the component should be clean, without water beads, let alone Exposure to rain and contact with dirt, oil and other dirt.

3. Painting of weather components cannot be carried out on rainy days.

4. Roof insulation construction cannot be carried out on rainy days and strong winds above level 5.

5. Since the air is relatively humid on rainy days, the welding rods should be stored in a moisture-proof manner and baked. The same welding rod should not be baked more than twice, and the management personnel should make baking records in a timely manner.

6. In case of strong winds, large components such as columns, main beams, supports, etc. should be corrected immediately. Once the positions are correct, they should be permanently fixed immediately to prevent unilateral instability. The components installed on the same day should form a spatial stability system.

5. On-site civilized construction measures:

1. The internal industry requires various materials and accounts (construction plan, safety education, safety disclosure, safety inspection, electrician’s daily inspection record, shift (Pre-speech records, ledgers), etc. are complete and neat, and the records are realistic and realistic. Special operations must be carried out with certificates, and safety responsibilities are clearly divided.

2. Wear a safety helmet when entering the site, wear a safety belt when working at heights, the safety net is tightly supported in accordance with regulations, there are protective sheds at the entrance and exit, and there are safe passages in small sites.

3. Electrical equipment should be equipped with three levels of control and two levels of protection (main gate box, distribution box, switch box, and matching electric shock protectors in the distribution box and switch box). The gate boxes should be standardized and the lines should be standardized. There are records of electrician inspections and side shaking.

4. This project carries out on-site civilized construction management. There are clear publicity slogans on site and standard color signs hung at dangerous locations.

5. There are flat and clean channels on site that are not blocked or accumulated in water, and construction wastewater is properly discharged through drainage ditches.

6. Civilized construction will not disturb residents, strictly control construction noise, and stop construction after 10 p.m.

7. Do not occupy roads in violation of regulations, do not set up or stack objects illegally, do not cause fires or traffic accidents, do not damage public facilities in violation of regulations, and do not pollute the environment and related roads inside and outside the site. Departments and health supervision departments should cooperate.