[Beijing] Construction organization design of main structure of subway station (bored pile)

Overview of station works This station is a three floor underground station, of which the first floor underground is the underground traffic floor, the second floor underground is the station hall floor, and the third floor underground is the station platform floor. The total building area is 41598m2. The total length of the station is 302.48m, the total height is 13.24m, and the total width is 33.95m. The total length of the traffic floor is 411.98m, the total height is 6.4m, and the total width is 111.2m. The station is equipped with 4 entrances and exits to connect with the traffic floor; The traffic floor is provided with 4 channels in total, and 3 additional entrance and exit channels are reserved to connect with other public buildings. In addition, stairs, escalators and elevators for the disabled are set up on the platform floor, the station hall floor, the traffic floor and the ground. The traffic floor, ground square and elevated pedestrian platform form a three-dimensional pedestrian traffic system. The station is equipped with two air ducts and ground air kiosks. 1 # air duct is combined with belt gallery, and 2 # air duct is located in the east of the north end of the station. The station adopts the platform type of two islands and one side. There are two main lines and one emergency stop line in the station. Cross crossover is set in front of the station. The main body of the platform area is a double-layer three column four span reinforced concrete frame structure, and the equipment area is a 3-4-span double-layer structure. There is no waterproof layer between the inner lining wall and the underground wall, and the composite structure is adopted. Through the measures of underground wall roughening and reinforcement tying, the two become an integral wall. The top, middle and bottom plates are rigid connected with the underground wall, and the plate is connected with the reinforcement in the underground wall through the reinforcement connector. Uplift piles are set at the structural bottom plate under XX at the north end of the station. The transportation layer realizes the transfer between subway and other transportation vehicles; The traffic floor adopts a single-layer three span frame structure. The columns of the traffic floor at the intersection with the station fall on the roof of the station, and the other columns adopt independent foundations. The foundation of the belt gallery directly falls on the roof of the station structure. The earth covering thickness of the station at the north end of the station below XX is 3~7m. The foundation pit enclosure of the traffic layer adopts manual hole digging piles, and the rotary jet grouting piles are used as the water stop curtain. The main body of the station mainly adopts the underground diaphragm wall as the lateral support structure, and the south end of the station adopts the bored pile as the enclosure, and the rotary jet grouting pile as the water stop curtain. Underground diaphragm wall is used for enclosure of entrance and exit. The steel pipe is used for the horizontal support of continuous wall and row of piles. The load-bearing enclosure structure is self waterproof with shrinkage compensating reinforced concrete, and the joint between the diaphragm wall and the row of piles is subject to special waterproof treatment. The roof of the station is paved with flexible waterproof coiled material in large area and protected with pea gravel concrete. The station structure adopts rigid self waterproofing. Special parts such as deformation joints, construction joints, post cast strips and wall pipes shall be treated with waterproof treatment. The station structure is constructed by open excavation method. The station foundation pit is close to XX Commercial City. The excavation of foundation pit may affect the structural foundation of XX Commercial City, so it is necessary to reinforce and strengthen the support in advance. After the construction of the main structure of the station is completed, the underground traffic layer shall be open cut. ...... Project characteristics 1) Large project scale: the station is 302.48m long, 33m wide and 17m deep; The traffic layer is 411.98m long, 40m wide and 7m deep. The excavation of foundation pit is 330000m3, the total amount of structural concrete is 599500m3, and the backfill soil is 76000m3. 2) Urgent construction period: the total construction period of the station and the traffic layer is 25 months according to the requirements of the bidding documents. Among them, the handover of the station track laying area is only 13 months, which is the key construction period of the station. 3) The project is located in a special environment: close to the entry-exit joint inspection port, railway station, XX commercial city, XX hotel, with large passenger flow and busy traffic, the project construction has a great impact on the social environment, and requires high protection and civilized construction of surrounding buildings. 4) The engineering geology is complex: the rock stratum trend and bedding plane inclination are variable, there are geological faults, and some underlying rocks are hard, which brings great difficulties to the construction. 5) The engineering design has many technical means, many specialties, complex structures, various construction procedures, and high requirements for construction organization and construction technology. 6) There are many construction interfaces and coordination involves a wide range. 7) The construction site is very restrictive, and the construction layout in the site changes greatly with the construction progress. Key points of project construction 1) The underground diaphragm wall has large quantities of work, poor geological conditions and hard rock, so the construction equipment, construction scheme, methods and processes must be correctly selected to ensure the construction progress and quality. 2) The excavation and support construction of deep and large foundation pit must ensure the construction progress and safety. 3) The transportation volume of earthwork and engineering materials is particularly large, so transportation vehicles must be carefully organized, and the organization and command of on-site and off-site transportation must be strengthened. 4) The main structure has a large amount of work, so it is necessary to arrange the operation sequence, organize reasonably, improve the work efficiency, and ensure the smooth implementation of the construction plan. 5) Strengthen the construction organization, on-site construction operation and civilized construction management, so that the construction can be carried out in a civilized and orderly manner as planned. 6) Strengthen the internal and external coordination during the whole construction process, so that the construction of the station can obtain the support of society and relevant units. 7) Prediction, prevention and timely handling of emergencies. Construction technical difficulties 1) Construction of diaphragm wall into rock. 2) Collapse prevention, surge prevention and rock blasting in the hole for excavation of retaining piles. 3) Control of rock blasting for foundation pit excavation and application of shockproof technology. 4) Construction technology treatment of composite surface of station diaphragm wall and lining structure wall and slab. 5) Construction of structural self waterproof and waterproof layer construction joints and deformation joints. 6) Monitoring and protection of surrounding buildings. ... Construction period objective 1) Complete the main works of the station from March 2002 to the end of May 2003, one month ahead of the bidding documents. 2) The main works of the traffic floor will be completed by the end of November 2003, one month ahead of the bidding documents. 3) By the end of February 2004, auxiliary works such as entrances, air ducts, air shafts, etc. were completed, two months ahead of the bidding documents. 4) Main milestone construction period: (1) The track laying area will be completed on March 1, 2003, one month ahead of the bidding document. The track laying conditions were met on April 15, 2003, one month ahead of the bidding documents. (2) On May 30, 2003, the installation and decoration of the station and the comprehensive pipeline laying conditions were provided, and the installation and decoration contractor entered the site one month earlier than the bidding documents.

Content introduction The main structure design drawing of a subway station This design is: the main structure design drawing of a subway station includes: main structure design description, beam structure general drawing and description, reinforcement node structure general drawing, station general layout, station main structure axis positioning drawing, station floor structure layout plan, station floor beam reinforcement drawing Station floor beam reinforcement table, station floor reinforcement drawing, station floor reinforcement table, station platform slab lower layer layout plan, platform slab lower layer wall detail and reinforcement list, longitudinal section layout, station standard section transverse section reinforcement drawing, interface layout drawing and reinforcement drawing, side wall reinforcement drawing, floor waste water pump room and sump plan, reinforcement drawing There are 63 drawings in total, including reinforcement list, exposed column list, concealed column list, structural waterproof design drawing, and main structure anti stray flow diagram of bottom plate wastewater pump room and sump.

Including: General layout of the structure Layout of the first concrete support and cover system Layout of the first concrete support and cover system Layout of the first concrete support and cover system Layout of the first concrete support and cover system (II) Layout of the 1~55 axis steel support Layout of the 1~55 axis foundation reinforcement plan Longitudinal section of the enclosure structure (1~3) Cross sectional drawing of enclosure structure Plan sectional drawing of air duct enclosure structure Plan sectional drawing of standard section Enclosure structure Continuous wall Reinforcement drawing Sequence diagram of reverse construction of middle plate Cross sectional drawing of station structure Plan sectional drawing of enclosure structure of No. 1~No. 4 entrances Plan sectional drawing of bridge reconstruction plan I Plan of transverse closure cofferdam Plan of waterproof standard Cross sectional drawing of waterproof Water construction joint node diagram Waterproof deformation joint node diagram Phase I construction site and traffic relief diagram, 62 CAD drawings in total

Building function: traffic building basement number: 2 floors Drawing depth: construction drawing Civil building design service life: 100 years Structure form: reinforced concrete structure, steel structure Reinforced concrete structure: frame Steel structure: light steel structure Special structure: other structure Foundation form: pile foundation Basement function: civil air defense Drawing number: 27 sheets Content introduction

Design drawing of main enclosure structure of a subway station

This design is: the design drawing of the main enclosure structure of a subway station, including:

There are 27 drawings in total, including design description, general layout of the main station enclosure structure, layout plan of the main enclosure structure, left line geological profile of the enclosure structure, profile of the enclosure structure, and foundation pit monitoring measurement drawing.