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chapter I description of compilation of construction organization design

section I compilation basis and scope

I compilation basis

1. Design drawings of the second contract section (K48+5 ~ K66+) of "Phase I Construction Drawing Design" of An (Kang) Ping (Li) secondary highway and "Volume I ~ IV"

2. The first and second volumes of the tender documents provided by Anping Secondary Highway Reconstruction Project Management Office in Ankang City are the contract terms and technical specifications.

3. The Minutes of Pre-bid Meeting and Addendum for the Construction Bidding of Ankang-Pingli Secondary Highway Reconstruction Project.

4. Current technical specifications, procedures and engineering quality inspection and evaluation standards issued by the state and the Ministry of Communications.

5. The site construction environment and conditions learned by participating in the site inspection activities organized by the construction unit.

6. The construction experience, existing construction equipment and management level accumulated by our unit for a long time engaged in high-grade highways.

II. Scope of Compilation

Subgrade, bridge and culvert, tunnel, protection and drainage and other works of 17.51km long in N2 Bid Section (K48+5 ~ K66+) of An (Kang) Ping (Li) Secondary Highway Reconstruction Project.

general situation of the project in the second quarter

1. Ankang-Pingli Highway, originally a section of National Highway 316, is now an important inter-provincial trunk line, numbered S28. The line starts from the Silk Reeling Factory in Pingli County (K22+76) and ends at the entrance of Ankang Winery (K9+), with a total length of 6.268km. According to the second-class highway standard in mountainous and hilly areas, the designed driving speed is 4 km/h, the integral subgrade width is 8.5m/12m, the pavement width is 7.m, the general radius of horizontal curve is 1m, and the limit radius is 5m.

2. The starting point of N2 Bid is located in Shijiawan Village, Dagui Town, with the pile number K48+5；; The terminal is located near Fengshanpu Village, Laoxian Town, with the pile number K66+ and the route length of 17.51km.

3. The line in this bid section is basically built along the old road, with mountains and rivers. Newly built 2 tunnels with 227m, 1 bridge with 25m, 4 medium bridges with 214.68m, 2 small bridges with 47.36m, and 6 culverts with 819.26m horizontal extension; Newly-built subgrade is 6.31km；; Rebuild 3 small bridges and 8 culverts; Use 1 medium bridge and 5 small bridges.

4. The line goes around the right bank of the Yellow River from the starting point of the bid section to K51+455, and a hemp willow tunnel (152m) is set at K51+55. After the tunnel exits, the Yellow River Bridge is set to cross the Yellow River for the second time; The line goes to K52+4 and enters Qiligou. The mountains on both sides are high and the roads are narrow until the mountains on both sides of K58+ are slightly gentle. The line passes through the old county town and Jinping town, and goes along the left side of the county river. A 3*16m prestressed reinforced concrete continuous plate girder bridge is set up near Ma 'anpu to cross the county river and form a new road. Hejiagoukou Tunnel (75m) is set at K63+615, and a 2*2m post-tensioned prestressed concrete slab beam bridge is set after exiting the tunnel, a 3*16m prestressed reinforced concrete continuous slab beam bridge is set at K65+484, and a 2*2m post-tensioned prestressed concrete slab beam bridge is set at K65+611.75. The line ends at K66+.

5. The main quantities of this contract are:

subgrade excavation earthwork: 63,48m3

subgrade excavation earthwork: 366,363m3

subgrade filling earth and stone: 161955m3 (including compaction before filling)

bored piles: 49 m/36

bridge foundation concrete: 1,748. Reinforced concrete)

Masonry of lower part of bridge: 1319 m3 (including flaky concrete and reinforced concrete)

Concrete pouring of upper part of bridge: 966m3

Precast prestressed concrete beam and slab: 975.2m3/56 pieces (including box girder, Hollow slab)

concrete bridge deck pavement: 271.4m2

bridge reinforcement installation: 66.3t

prestressed steel strand: 37.5t

reinforced concrete slab culvert: 625.84m /52

stone arch culvert: 219.77m/ Open cut earthwork of 16

tunnels: 456 m3

tunnel excavation earthwork: 193 m3

shotcreting No.2 support: 11 m3

steel frame support: 164.53t

small conduit and anchor rod: 6.126t

tunnel body concrete lining: 5469.2. Tunnel portal)

Concrete pavement in the tunnel: 653 m3 (including base)

Reinforcement in the tunnel: 19.7 t (including steel mesh)

6. The bidding period is required to be 14 months.

construction conditions in the third quarter

1. topography and landforms

the line is located on the northern slope of Daba mountain range, with low mountain landforms. The terrain is high in the south and low in the north. From north to south, the mountains gradually increase and the valleys gradually deepen. Rivers and ridges all run in the north-south direction, and the surface along the line fluctuates greatly, and there are many gullies in the shape of chicken feet.

the mountains and slopes in this area are steep, and the rocks are strongly weathered and broken, which is easy to form collapses and landslides. Geomorphology can be subdivided into: hilly and mountainous areas, river terraces, floodplains and other micro-geomorphological units.

ii. geology and earthquake

the route of this contract section is located in the southeast of the lower Paleozoic fold belt of south Qinling in Kunlun-Qinling fold system, belonging to the trough system. The structural features in the area are mainly folds, fault uplifts and fault basins, which are located in the Laoxian-Zhuxi compound syncline fold area, and the southernmost part of the area crosses the Pingli uplift area.

The upper soil layer of the bridge site is sand, gravel and pebbles, and the lower part is mainly phyllite and thousands of argillaceous slates, so the engineering conditions are good. The culvert site is mainly located in slope diluvial gravel soil and mixed gravel loam. Fill subgrade is mostly located in gullies, paddy fields, ponds and other low sections, with a layer of gray, gray-black low liquid limit clay or artificial fill on the surface; The excavated subgrade mainly consists of argillaceous slate, carbonaceous slate and phyllite. The lithology of the tunnel site is mainly phyllite and thousand-piece argillaceous slate, with low surrounding rock category, thousand-piece structure and developed schistosity.

the seismic intensity in the region is classified as ⅶ, and landslides may occur in the weak structure and the slope angle is less than the slope angle.

Adverse geological phenomena include landslide, debris flow, collapse and collapse

III. Climate and hydrology

The line area belongs to subtropical humid monsoon climate with four distinct seasons, with an annual average temperature of 13.9℃, the coldest in January and an average temperature of 2℃; It is hottest in July, with an average temperature of 26℃ and a maximum temperature of 4.2℃.

precipitation is mostly concentrated in summer and autumn, with little rain and snow in winter. The average annual rainfall in this area is 943mm, and the average annual evaporation is 1276 mm. The frost-free period of the whole year is about 25 days, with an average maximum frozen soil depth of 7cm and a maximum wind speed of 24.3 m/s.

The main rivers along the route are the Huangyanghe River and the Xianhe River, both of which belong to the Han River system and directly flow into the Han River. The river is crystal clear at ordinary times, and it can wade across the river in dry season, but it is long and violent in flood season. There are pore water, bedrock fissure water and confined water in groundwater, and the surface water is extremely rich, so there will be water almost every ditch in flood season.

iv. Traffic and transportation conditions

Due to the restriction of mountains, there is no detour road in this contract section, only the original third-class road connects Ankang and Heping, and the rest lines are in disrepair, with low alignment standard, long detour and extremely poor road conditions. The terrain along the line is close to the mountain and water, with steep terrain, one interruption and one blockage, making it difficult to set up longitudinal access roads.

v. Road building materials and yard

The bedrock in this contract section is mostly thin schist, slate, phyllite, etc., which is severely weathered, and there are few usable stones. Good stones are mainly purchased from five quarries, such as Pingxun Road, Linggong Village, Niuwang Township and Sangshu Formation, Yeshegou, Dagui Town.

The sand used comes from Huangyanghe River, Xianhe River and Hanjiang River. The sand yard is rich in reserves and the quality meets the requirements of the specification, among which the quality of Hanjiang River sand is the best.

the subgrade filling materials in this contract section can use excavation and tunnel waste slag to meet the construction needs.

No.2 Cement Plant in Pingli County, with an annual output of 12, tons, can supply 325 ~ 525 cement with excellent quality, and is located near K6+5 line with convenient transportation. It can also be purchased from Ankang market and transported to the site by car.

steel bars are purchased by Ankang city, and steel strands must be purchased from other places and transported to the construction site by car.

VI. Water for construction and domestic use

The water source in this contract section is extremely rich, continuous all the year round, and the water quality is clean and pollution-free, which can meet the needs of construction and domestic use.

VII. Power supply and communication

All villages and towns along the line have power supply, so the construction can be connected to the transmission line nearby, and at the same time, self-generation is used to assist the construction.

there are domestic telephone services in towns and villages along the route, and mobile phones can also be used for domestic telecommunications contact.

VIII. Other

Old counties and towns have hospitals, farmers' markets, gas stations and other service facilities, which can meet the needs of staple food supply, medical care and life.

chapter ii general arrangement of construction

section I general construction objectives

I. time limit objectives

this bid is scheduled to start on August 1, 21 and be completed on August 31, 22, with a total construction period of 13 months, one month ahead of the required construction period of 14 months.

1. The construction preparation will last for one month, and it will end at the end of August 21.

2. Subgrade construction will take 11 months and be completed on July 31, 22.

3. The culvert will be constructed for 7 months and will be completed by the end of March 22.

4. The bridge construction was completed in 11 months from September 21 to July 22.

5. The tunnel starts from the beginning of September 21 and ends at the end of July 22.

6. The protection and drainage works of bridge deck, guardrail and subgrade shall be completed before August 15th, 22, and the completion inspection and delivery shall be completed at the end of August.

second, the quality goal

1. The project quality meets the requirements of the current national design, construction and acceptance specifications and reaches an excellent level.

2. The qualified rate of subdivisional work is 1%, and the excellent rate is over 93%, among which the excellent rate of key projects in subdivisional work is 1%, and the unit project has reached the excellent grade.

3. Create provincial and ministerial quality projects and excellent projects.

III. Safety objectives

1. Put an end to work-related deaths, and the annual injury rate of on-site construction personnel is not more than 5 ‰;

2. No liability accidents such as broken pile, overturning of beam body and tunnel collapse will occur;

3. No major or above equipment accidents, major traffic accidents and major fire accidents will occur;

4. put an end to construction accidents such as ditch blockage, road traffic interruption and communication power damage caused by construction.

IV. Environmental protection objectives

The project spoil, mud discharge and domestic garbage disposal shall be carried out in accordance with the relevant construction and environmental management measures, and actively respond to other environmental protection requirements put forward by the owner.

V. Civilized construction objectives

According to the owner's requirements for civilized construction on the construction site, prepare various brand maps and publicity slogans; Dressing the, a construction worker, took up his post by listing, behaved in a civilized manner, controlled noise, kept the site clean and orderly, and strived for a civilized construction site.

Section II Project Organization Setup and Site Management

I. Organization

According to the characteristics of the project, the Anping Highway Reconstruction Project Management Department is established on the principle of strengthening management, facilitating coordination and enriching the operation floor. The project intends to set up engineering department, safety and quality department, planning and finance department, materials and equipment department and comprehensive office. The engineering department has a technical room, a dispatching room, a measurement class and a reference room; The Safety and Quality Department has a quality inspection room, a security inspection room, a laboratory and a standard implementation office; The planning and finance department has a finance office, a planning office and a contract office; The material equipment department has a material room and a machine maintenance station; The comprehensive office has a traffic control office, a comprehensive office and a logistics room. The project department consists of three road construction teams, three bridge and culvert construction teams and one tunnel construction team. The site organization is shown in Figure 2-2-1.

II. Key personnel of the project and their responsibilities

1. Key personnel of the project

The project management is composed of one project manager, one deputy manager (concurrently secretary), one chief engineer and one chief economist, and the project manager is in charge of overall work; Deputy project manager and secretary in charge of on-site engineering coordination; The chief engineer is responsible for the construction scheme, technology and application of new technologies, quality, safety and progress control, etc. The chief economist focuses on contract management, work inspection and pricing, and fund scheduling. Each construction team shall have one captain and one vice captain, who shall be responsible for the construction management and process scheduling of each shift.

see the following table 2-2-1 for the arrangement of main management and technical personnel of the project department, and refer to the relevant part of the Schedule to Tender for specific personnel.

Figure 2-2-1

Table 2-2-1

Table 2-2-1

Average age of personnel

Total: female

1. Manager 4

1. Project manager 47 1

2. Assistant manager (concurrently project secretary). 42 1

3 Chief Engineer 33 1

4 Chief Economist 41 1

2, Technician 21 3

1 road engineer 37 3

2 bridge engineer 38 2

3 tunnel engineer 33 2

4 geological engineer 41 2

5 mechanical engineer 36 2 1

6 survey engineer 42 1

7 testing engineer 36 2

8 quality inspection engineer 42 3

9 other technical workers. Member 3 4 2

III. Economic management personnel 8 2

1 Contract management personnel 34 1

2 Finance personnel 36 2 1

3 Planning personnel 38 1

4 Material supply personnel 4 2

5 Other economic management office personnel 39 1 1

2. Responsibilities of main project managers

(1) Project manager <

② Implement the project quality and safety objectives, establish and improve the organization, and rationally allocate the required resources according to the engineering situation.

③ Take charge of overall work to ensure the full implementation of the project contract.

④ organize regular safety and quality inspections, and preside over the formulation of improvement plans and various measures.

(2) The chief engineer of the project

① is fully responsible for the construction technology management of this project, and presides over the preparation of the implementation construction organization design of this project.

② Supervise and inspect the procurement of materials and equipment, strengthen the process control in the whole construction process, and preside over the review and disposal of nonconforming products.

③ Organize the popularization and application of the "Four Innovations" technology, compile relevant achievement reports, and organize the preparation of completion documents and acceptance handover.

(3) Chief economist of the project

① Seriously implement the relevant national guidelines, policies, decrees and regulations, and carry out operation and management work around the quality policy and objectives and the excellence planning of the project.

② preside over the work inspection and valuation of the whole project, and urge to solve the problems in the budget and final accounts.

(3) organize the application of statistical technology to do a good job in planning and statistics, so as to make the planning and statistics timely, accurate and complete, and provide a reliable basis for the project manager to adjust and make decisions.

④ pay special attention to cost management, make scientific use of resources, and formulate a system of saving and reducing expenditure.

(4) Minister of Engineering Technology