CN114908794B

CN114908794B - Assembled building method of subway station

Info

Publication number: CN114908794B
Application number: CN202210379464.2A
Authority: CN
Inventors: 朱宏海; 王佳庆; 王呼佳; 李辉; 李文武; 倪安斌; 宋同伟; 李俊; 周明亮; 郭俊
Original assignee: China Railway Eryuan Engineering Group Co Ltd CREEC
Current assignee: China Railway Eryuan Engineering Group Co Ltd CREEC
Priority date: 2022-04-12
Filing date: 2022-04-12
Publication date: 2023-05-16
Anticipated expiration: 2042-04-12
Also published as: CN114908794A

Abstract

The assembled building method for subway station has simplified underground structure and construction, fast construction speed and high construction quality. The method comprises the following steps: adopting an open cut or cover cut method to construct, and completing water lowering and draining according to the implementation sequence, excavation of a foundation pit, a foundation pit support structure and the like; positioning and assembling the prefabricated components of the bottom plate to finish the concrete pouring of the cast-in-place part of the bottom plate; assembling the first side wall blocks to finish the concrete pouring of the cast-in-situ part of the lower side wall; positioning and assembling the prefabricated member of the middle plate frame to finish the concrete pouring of the cast-in-place part of the middle plate frame; after the opening of the middle plate is accurately determined, positioning, paving and assembling the precast middle plate, and completing the concrete pouring of the cast-in-place part of the surface of the middle plate; assembling the second side wall blocks to finish the concrete pouring of the cast-in-place part of the upper side wall; positioning and assembling the prefabricated components of the top plate frame to finish the concrete pouring of the cast-in-place part of the top plate frame; and after the top plate is accurately drilled, assembling the top plate precast slab and completing the concrete pouring of the cast-in-place part of the top plate surface.

Description

Assembled building method of subway station

Technical Field

The invention belongs to the technical field of tunnels and underground engineering, and particularly relates to an assembled building method of a subway station.

Background

Combining the requirements of the national and local governments for the development of fabricated buildings and green construction. Meanwhile, the requirements of construction units on engineering quality and construction period are increasingly improved. The traditional subway station adopts a full cast-in-place mode of open (cover) excavation, and has the problems of long construction period, high construction cost, high energy consumption, high construction quality control difficulty and the like.

The underground structure is mainly subjected to horizontal load (water and soil pressure), vertical load (dead weight, live load and the like of the middle plate and the inner partition wall) and earthquake action, and meets the requirements of civil air defense, water resistance, fire resistance and corrosion release. The structure is required to meet the strength, stiffness, stability and durability requirements. Traditional underground engineering adopts cast-in-situ reinforced concrete. The construction links of binding reinforcing steel bars, pouring concrete, building templates and the like are more, the construction period is long, and the on-site quality control difficulty is high.

In summary, the existing subway station or underground space development structure still mainly adopts a construction method of full cast-in-situ reinforced concrete, which is not in line with the requirements of national building energy conservation, green construction and great development of assembled buildings. In order to gradually push the fabricated building in the underground structure typified by the subway, accelerate the construction speed of the underground structure, improve the construction quality, achieve the purposes of saving the cost, saving the energy and building in green, the fabricated building method of the subway station is necessary to carry out intensive research.

Disclosure of Invention

The invention aims to solve the technical problem of providing an assembled building method of a subway station, which is used for effectively simplifying the design of an underground structure and the construction, accelerating the construction speed and improving the construction quality.

The technical scheme adopted for solving the technical problems is as follows:

the invention relates to an assembled building method of a subway station, which comprises the following steps:

step 1, constructing a subway station by adopting an open cut or cover cut method, and completing drainage according to the implementation sequence, excavating a foundation pit, supporting a foundation pit enclosure structure, erecting a temporary support and constructing a waterproof layer;

step 2, positioning and assembling the prefabricated components of the bottom plate according to the design positioning, and connecting the beam column joints and the steel bars in the post-pouring part of the beam plate to finish the concrete pouring of the cast-in-place part of the bottom plate;

step 3, removing foundation pit support structures between the middle plate and the bottom plate, positioning and assembling middle plate frame prefabricated members, connecting reinforcing steel bars in post-pouring parts of beam column joints of the parts, completing concrete pouring of cast-in-place parts of the middle plate frame, and realizing consolidation of column members in the middle plate frame prefabricated members and the bottom plate prefabricated members;

step 4, after the middle plate is accurately drilled, positioning, paving and assembling the middle plate precast slab, binding the superimposed slab steel bars on the upper part of the middle plate precast slab, and completing the concrete pouring of the cast-in-place part of the surface of the middle plate;

step 5, assembling a first side wall block between the middle plate and the bottom plate, and connecting the steel bars in the post-cast part of the wallboard to finish the concrete pouring of the cast-in-situ part of the lower side wall;

step 6, removing the foundation pit support structure between the middle plate and the top plate, positioning and assembling the top plate frame prefabricated member, connecting the steel bars in the post-pouring part of the beam column node, completing the concrete pouring of the cast-in-place part of the top plate frame, and realizing the consolidation of the top plate frame prefabricated member and the middle column member in the middle plate prefabricated member;

step 7, after the top plate is accurately drilled, positioning, paving and assembling the top plate precast slabs, binding reinforcing steel bars of superimposed plates on the upper parts of the top plate precast slabs, and completing concrete pouring of cast-in-place parts of the top plate surfaces;

and 8, splicing a second side wall block between the middle plate and the top plate, and connecting the steel bars in the post-cast part of the wallboard to finish the concrete pouring of the cast-in-situ part of the upper side wall.

The beneficial effects of the invention are mainly shown in the following aspects:

1. the consumption of concrete and steel bars is effectively saved. The size of the components of the traditional subway station is determined according to the factors such as structural arrangement, the stressed span of the components and the like. Taking the middle plate as an example, 400mm is generally adopted in a double-column station, 500mm is generally adopted in a single-column station, and the plate thickness of a non-column station is 600-700 mm. After the method is adopted, the height of the cast-in-situ frame beam is kept consistent with the thickness of the traditional plate, and the total thickness of the assembled laminated middle plate is generally 200-300 mm. Compared with the traditional method, when the middle plate adopts the assembled laminated slab, the plate thickness of the trolley station is reduced by 37.5-50%, and the plate thickness of the trolley station is reduced by 50-64%, so that the method has good technical and economic benefits;

2. and post-pouring wet joints are adopted for key parts such as beam column joints, wallboard joints and the like, so that the prefabrication maximization of the component is realized on the premise of ensuring the overall stress performance. The prefabricated part can adopt high-strength concrete and high-strength steel bars, so that resource conservation and reduction of the size and the dead weight of the prefabricated part are realized;

3. the side walls, the middle plate and the top plate outside the frame part are detachable, so that the requirements of post-structural transformation of the built station and shared interconnection with the peripheral underground space can be met;

4. in the subway station design, a middle plate and a top plate Kong Bianliang with opening sizes smaller than 6m can be omitted, the design is simplified, the investment is saved, and if the equipment area of the underground space adopts the assembly method, the opening reconstruction of the middle plate in the equipment area caused by the post-marking of electromechanical equipment can be reduced;

5. the working procedures can be flexibly converted, and the method can be used for the whole assembly construction of the whole member of the underground (cover) subway station, and can also be used for the cast-in-situ of the bottom plate and the side wall, and the partial assembly construction of the middle plate and the top plate of the structure;

6. the method can simplify design and construction, improve the utilization rate of assembled components of the subway station, optimize the size of the components, improve the construction quality, save the cost, save the energy and reduce the carbon emission. The information management and standardized design can be realized through a Building Information Model (BIM) technology, and the multi-working-face mechanized flow construction can be realized.

Drawings

The specification includes the following 18 drawings:

FIG. 1 is a typical floor plan of an assembled subway station floor;

FIG. 2 is a typical floor plan of a panel in an assembled subway station;

FIG. 3 is a typical floor plan of an assembled subway station roof;

FIG. 4 is a cross-sectional view taken along line A-A of FIGS. 1, 2 and 3;

FIG. 5 is a cross-sectional view taken along line B-B of FIGS. 1, 2 and 3;

fig. 6a is a top view of side sill block dll 1;

fig. 6b is a side view of side sill block dll 1;

FIG. 7a is a top view of a bottom wall beam block DQL 1;

FIG. 7b is a side view of the bottom wall beam block DQL 1;

fig. 8a is a top view of the center sill block zl 1;

fig. 8b is a side view of the center sill block zl 1;

FIG. 9a is a top view of the middle wall block ZQL 1;

FIG. 9b is a side view of the middle wall block ZQL 1;

fig. 10a is a top view of top rail block TZL 1;

fig. 10b is a side view of roof rail block TZL 1;

FIG. 11a is a top view of top wall block TQL 1;

FIG. 11b is a side view of top wall block TQL 1;

fig. 12 is a side view of the connection between the center sill block zl1 and the center pillar Z1;

FIG. 13 is a side view of the connection of the middle wall block ZQL1 to the wall stud QZ1;

fig. 14 is a side view showing the connection between the roof side rail block TZL1 and the center pillar Z1;

FIG. 15 is a side view of the connection of top wall block TQL1 to wall stud QZ1;

fig. 16 is a side view of a connection between the side sill block DQL1 (bottom sill block DQL 1) and the center pillar Z1 (wall pillar QZ 1);

FIG. 17 is a schematic diagram of the construction modes of the wall column QZ1 and the longitudinal ribs of the beam blocks;

fig. 18 is a schematic diagram of the structural modes of the middle upright Z1 and the longitudinal rib of the cross beam block.

The component names and corresponding labels are shown: a bottom girder block DZL1, a bottom wall girder block DQL1, a bottom girder block DHL1, a wall column QZ1, a center column Z1, a bottom plate block DB1, a bottom plate first post-cast node DXJ1, a bottom plate second post-cast node DXJ2, and a bottom plate post-cast strip DXJ3; middle longitudinal beam block ZZL1, middle wall beam block ZQL1, middle cross beam block ZHL, middle plate precast slab ZB1, middle plate first post-cast node ZXJ1, middle plate second post-cast node ZXJ2, middle plate third post-cast node ZXJ3, middle plate fourth post-cast node ZXJ4, middle plate laminated layer ZXJ5; top longitudinal beam block TZL, top wall beam block TQL1, top cross beam block THL1, top slab precast slab TB1, top slab first post-cast node TXJ1, top slab second post-cast node TXJ2, top slab third post-cast node TXJ3, top slab fourth post-cast node TXJ4, top slab overlap layer TXJ; the first side wall block Q1 and the second side wall block Q2; side wall first post-cast strip QXJ1, side wall second post-cast strip QXJ2, step side plate 10, span middle groove 11 and end boss 12.

Detailed Description

Referring to fig. 1 to 5, the method for constructing an assembled subway station according to the present invention includes the steps of:

step 1, constructing a subway station by adopting an open cut or cover cut method, and completing water lowering and draining according to the implementation sequence, excavating a foundation pit enclosure structure, excavating the foundation pit, erecting a temporary support and constructing a waterproof layer;

step 4, after the middle plate is accurately drilled, positioning, paving and assembling a middle plate precast slab ZB1, binding superimposed sheet steel bars on the upper part of the middle plate precast slab ZB1, and completing concrete pouring of a cast-in-place part of the surface of the middle plate;

step 5, assembling a first side wall block Q1 between the middle plate and the bottom plate, and connecting steel bars in the post-cast part of the wallboard to finish the concrete pouring of the cast-in-situ part of the lower side wall;

step 7, after the top plate is accurately drilled, positioning, paving and assembling a top plate precast slab TB1, binding superimposed slab reinforcements on the upper part of the top plate precast slab TB1, and completing concrete pouring of a cast-in-place part of the top plate surface;

and 8, splicing a second side wall block Q2 between the middle plate and the top plate, and connecting the steel bars in the post-cast part of the wallboard to finish the concrete pouring of the cast-in-situ part of the upper side wall.

The invention effectively simplifies the design of underground structure and construction, accelerates the construction speed and improves the construction quality, can effectively save the consumption of concrete and reinforcing steel bars, and is beneficial to reducing the construction cost. Compared with the traditional method, when the middle plate adopts the assembled laminated slab, the plate thickness of the trolley station is reduced by 37.5-50%, and the plate thickness of the trolley station is reduced by 50-64%, so that the method has good technical and economic benefits.

The subway station assembly type structure comprises an assembly type structure part and a cast-in-situ part. The assembled structure part mainly comprises a bottom plate frame prefabricated member, a bottom plate prefabricated plate DB1, a middle plate frame prefabricated member, a middle plate prefabricated plate ZB1, a top plate frame prefabricated member, a top plate prefabricated plate TB1 and the like, wherein the size and the reinforcement of each prefabricated member are determined according to specific stress calculation in a construction stage and a use stage. The cast-in-situ part can be divided into post-cast joints between the prefabricated frame beams and the prefabricated frame columns, post-cast belts between the prefabricated frames, the prefabricated bottom plates and the side walls, and post-cast laminated layers of the middle plates and the top plates. The post-pouring node and the post-pouring belt are arranged in the area with smaller bending moment and shearing force according to the integral stress of the structure. Referring to fig. 4, a stress frame structure system is formed by beams, columns, bottom plates and side wall components, so that the problem of overall stress of a subway station is effectively solved. After the beam, column, bottom plate and side wall assembled components complete post-pouring wet joint and reach the strength, the installation of the middle plate and top plate prefabricated components and the implementation of the cast-in-situ laminated layer are completed according to the construction period requirement. The middle plate precast slab ZB1 and the top plate precast slab TB1 bear vertical loads in the projection range, and transfer the loads to the beam precast elements on the same layer. The invention can simplify design and construction, optimize component size, improve construction quality, save cost, save energy and reduce carbon emission. The information management and standardized design can be realized through a Building Information Model (BIM) technology, and the multi-working-face mechanized flow construction can be realized.

Referring to the embodiment shown in fig. 1, 4 and 5, the floor preform includes a side sill block DQL1, a bottom cross sill block DHL1, a wall column QZ1, a center column Z1 and a floor block DB1. The side sill blocks DZL1 and the side sill blocks DQL1 are arranged along the length direction of the station, the side sill blocks DHL1 are arranged along the width direction of the station, the wall posts QZ1 and the middle posts Z1 are arranged along the height direction of the station, the middle posts Z1 are positioned at the intersecting positions of the side sill blocks DZL1 and the side sill blocks DHL1, and the wall posts QZ1 are positioned at the intersecting positions of the side sill blocks DQL1 and the side sill blocks DHL 1. The bottom plate block DB1 is positioned in a rectangular range surrounded by the bottom longitudinal beam block DZL1, the bottom wall beam block DQL1 and the bottom cross beam block DHL 1. The floor cast-in-place portion includes a floor first post-cast node DXJ1, a floor second post-cast node DXJ2, and a floor post-cast strip DXJ3. The first post-pouring node DXJ1 of the bottom plate is arranged at the end part of the bottom wall beam block DQL1 and at the area where the end part of the bottom beam block DHL1 is intersected with the wall column QZ1 and is used for connecting the bottom wall beam block DQL1, the bottom beam block DHL1 and the wall column QZ1; the bottom plate second post-cast joint DXJ2 is arranged at the end part of the bottom longitudinal beam block DZL1 and the area where the end part of the bottom transverse beam block DHL1 is intersected with the middle column Z1 and is used for connecting the bottom longitudinal beam block DZL1, the bottom transverse beam block DHL1 and the middle column Z1. The bottom plate post-pouring zone DXJ3 is arranged between the bottom plate block DB1 and the bottom longitudinal beam blocks DZL1, between the bottom wall beam blocks DQL1 and between the bottom transverse beam blocks DHL1 and is used for connecting the bottom longitudinal beam blocks DZL1, the bottom wall beam blocks DQL1, the bottom transverse beam blocks DHL1 and the bottom plate block DB1.

Referring to the embodiment shown in fig. 2, 4 and 5, the middle plate frame prefabricated member includes a middle side member block zl1, a middle cross member block ZHL1, a middle wall beam block ZQL1, a wall column QZ1 and a middle column Z1. The middle side beam blocks ZZL1 and the middle wall beam blocks ZQL1 are arranged in the station length direction, the middle cross beam blocks ZHL1 are arranged in the station width direction, and the wall posts QZ1 and the middle vertical posts Z1 are arranged in the station height direction. The middle column Z1 is positioned at the intersection position of the middle longitudinal beam block ZZL1 and the middle transverse beam block ZHL1, and the wall column QZ1 is positioned at the intersection position of the middle wall beam block ZQL1 and the middle transverse beam block ZHL. The middle plate frame cast-in-situ part comprises a first middle plate post-pouring node ZXJ1, a second middle plate post-pouring node ZXJ2, a third middle plate post-pouring node ZXJ3 and a fourth middle plate post-pouring node ZXJ4. The first post-pouring node ZXJ1 of the middle plate is arranged at the end part of the middle beam block ZHL and at the area where the end part of the middle wall beam block ZQL1 is intersected with the wall column QZ1 and is used for connecting the middle beam block ZHL, the middle wall beam block ZQL1 and the wall column QZ1; the middle plate second post-pouring node ZXJ2 is arranged at the end part of the middle beam block ZHL and at the area where the end part of the middle beam block ZZL1 is intersected with the middle column Z1 and is used for connecting the middle beam block ZZL1, the middle beam block ZHL and the middle column Z1. The third post-cast joint ZXJ3 of the middle plate is arranged in the area where the end part of the middle beam block ZHL and the middle wall beam block ZQL1 cross the middle and is used for connecting the middle beam block ZHL and the middle wall beam block ZQL1. The middle plate fourth post-pouring node ZXJ4 is arranged in a region where the end part of the middle beam block ZHL and the middle longitudinal beam block ZZL1 cross the middle and is used for connecting the middle beam block ZHL and the middle longitudinal beam block ZL1. The cast-in-place part of the middle plate surface is a middle plate laminated layer ZXJ5 formed by concrete poured on the top surface of the middle plate precast slab ZB 1.

Referring to fig. 1 and 5, after the cast-in-place portion of the middle plate is completely completed, a first side wall block Q1 is installed, and the side wall block Q1 is located in a rectangular range enclosed by the wall column QZ1, the bottom wall beam block DQL1, and the middle wall beam block ZQL1. The wall post-cast strip QXJ1 is arranged between the side wall block Q1 and the wall column QZ1, between the bottom wall beam block DQL1 and the middle wall beam block ZQL1, and is used for connecting the wall column QZ1, the bottom wall beam block DQL1, the middle wall beam block ZQL1 and the first side wall block Q1.

Referring to fig. 4 and 5, the column members are formed as a single piece from the bottom plate to the top plate, column member reinforcing bars are reserved at the joint parts of the bottom plate, the middle plate and the top plate, and the joints are cast in place to form a whole after the prefabricated members of the bottom plate are installed and positioned. The post member may be temporarily supported and secured during the initial positioning stage.

Referring to the embodiment shown in fig. 3, 4 and 5, the roof frame preform includes a roof rail block TZL1, a roof rail block THL1, a roof wall block TQL1, a center pillar Z1 and a wall pillar QZ1, the roof rail block TZL1, the roof wall block TQL1 being arranged in the station length direction, the roof rail block THL1 being arranged in the station width direction, the center pillar Z1 and the wall pillar QZ1 being arranged in the station height direction, the center pillar Z1 being located at a position where the roof rail block TZL and the roof rail block THL1 intersect, the wall pillar QZ1 being located at a position where the roof wall rail block TQL1 and the roof rail block THL1 intersect. The roof frame cast-in-place section includes a roof first post-cast node TXJ1, a roof second post-cast node TXJ, a roof third post-cast node TXJ, and a roof fourth post-cast node TXJ4. The first post-cast node TXJ1 of the top plate is arranged at the end part of the top beam block THL1 and the area where the end part of the top wall beam block TQL1 is intersected with the wall column QZ1 and is used for connecting the middle beam block ZHL, the middle wall beam block ZQL1 and the wall column QZ1. The top plate second post-pouring node TXJ is disposed at the end of the top beam block THL1 and at the area where the end of the top beam block TZL intersects the center pillar Z1, and is used for connecting the top beam block TZL1, the top beam block THL1 and the center pillar Z1. The third post-pouring node TXJ3 of the top plate is arranged in a region where the end part of the top beam THL1 and the middle of the top wall beam TQL1 are intersected and is used for connecting the top beam THL1 and the top wall beam TQL1. The top plate fourth post-pouring node TXJ is disposed at a region where the end of the top beam THL1 and the top girder block TZL cross centrally and is used for connecting the top beam block THL1 and the top girder block TZL. The cast-in-place part of the top plate surface is a top plate laminated layer TXJ formed by concrete poured on the top surface of the top plate precast slab TB 1.

The concrete adopted by the cast-in-situ partial laminated layer is high-performance concrete or cement-based composite material, and the strength grade and mechanical property of the concrete are not lower than C50.

The bottom girder block DZL1, the bottom wall girder block DQL1, the middle girder block ZZZL 1, the middle wall girder block ZQL1, the top girder block TZL and the top wall girder block TQL1 are provided with girder end step type side plates 10, so that a cast-in-situ part of a girder column node does not need a template, and the arrangement stress performance of the cast-in-situ part node of the framework is good.

Referring to fig. 2 and 5, after the cast-in-place portion of the top plate is completely completed, a second side wall block Q2 is installed, and the side wall block Q2 is located in a rectangular range enclosed by the wall column QZ1, the middle wall beam block ZQL1, and the top wall beam block TQL1. The wall post-pouring strip QXJ is arranged between the side wall block Q2 and the wall column QZ1, the middle wall beam block ZQL1 and the top wall beam block TQL1 and is used for connecting the wall column QZ1, the middle wall beam block ZQL1, the top wall beam block TQL1 and the second side wall block Q2.

Referring to fig. 1, 4 and 5, the bottom wall beam block DQL1 has an L-shaped beam section with a key groove, and the section enables the post-cast strips of the bottom wall beam block DQL1, the bottom plate block DB1 and the side wall block Q1 to be positioned at a position with small bending moment and shearing force, and the structural stress performance is good.

Referring to fig. 2, 4 and 5, the middle wall beam block ZQL1 has a T-shaped beam section with a key slot, and the section enables the middle wall beam block ZQL1 to have bearing capacity and rigidity in two directions of horizontal direction and vertical direction, and meanwhile, the size and rigidity of the section of the first post-cast node ZXJ1 of the T-shaped middle plate formed by the middle beam block ZHL1 are larger than those of a standard section, so that the structural stress performance is good.

Referring to fig. 3, 4 and 5, the top wall beam TQL1 has an L-shaped beam section with a key slot, and this section makes the top wall beam TQL1 have a bearing capacity and rigidity in both the horizontal direction and the vertical direction, and meanwhile, the size and rigidity of the section of the first post-cast node TXJ of the L-shaped top plate formed by the top beam THL1 are greater than those of the standard section, so that the structural stress performance is good.

Referring to fig. 6a and 6b, the beam ends of the side sill blocks dll 1 have a pair of stepped side plates 10. Referring to fig. 7a and 7b, the beam end of the foundation wall beam block DQL1 has a stepped side plate 10. The space for connecting the middle column Z1 and the middle beam block ZHL1 is reserved, the function of a bottom plate post-pouring node TXJ and TXJ2 template is achieved, and the quality and the integrity of the post-pouring node are guaranteed.

Referring to fig. 8a and 8b, the beam end of the middle beam block ZZL1 has a pair of step-shaped side plates 10, reserves a space for connecting with the middle column Z1 and the middle beam block ZHL1, plays a role of a second post-pouring node ZXJ2 template of the middle plate, and ensures the quality and integrity of the post-pouring node. The middle longitudinal beam block ZZL1 is provided with a middle-span groove 11, and a space for connecting the middle transverse beam block ZHL is reserved.

Referring to fig. 9a and 9b, the beam end of the middle wall beam block ZQL1 is provided with a step-shaped side plate 10, and is provided with an end boss 12, so that a space for connecting with the wall column QZ1 and the middle beam block ZHL1 is reserved, the function of a first post-pouring node ZXJ1 template of the middle plate is achieved, and the quality and the integrity of the post-pouring node are ensured. The middle wall beam block ZQL1 is provided with a middle-span groove 11, and a space for connecting the middle wall beam block ZHL1 is reserved.

Referring to fig. 10a and 10b, the beam end of the top longitudinal beam block TZL1 has a pair of step-shaped side plates 10, reserves a connection space with the upright column Z1 and the top cross beam block THL1, plays a role of a second post-pouring node TXJ template of the top plate, and ensures the quality and integrity of the post-pouring node. The roof rail blocks TZL are provided with mid-span grooves 11, reserving space for connection with the mid-rail blocks ZHL.

Referring to fig. 11a and 11b, the beam end of the top wall beam TQL1 has a step-shaped side plate 10, and is provided with an end boss 12, so as to reserve a connection space between the wall column QZ1 and the top beam THL1, and play a role of a template of the top plate first post-pouring node TXJ, thereby ensuring the quality and integrity of the post-pouring node. The top wall beam block TQL11 is provided with a midspan groove 11, and a connecting space with the middle beam block ZHL is reserved.

Fig. 12 to 16 are schematic views of longitudinal rib structures of each cast-in-situ node. Fig. 12 is a longitudinal rib structure of the middle girder block ZZL1 and the middle post Z1 at the middle plate second post-pouring node ZXJ2, fig. 13 is a longitudinal rib structure of the middle girder block ZQL1 and the wall post QZ1 at the middle plate first post-pouring node ZXJ1, fig. 14 is a longitudinal rib structure of the top girder block TZL1 and the middle post Z1 at the top plate second post-pouring node TXJ2, fig. 15 is a longitudinal rib structure of the top girder block TQL1 and the wall post QZ1 at the top plate first post-pouring node TXJ1, and fig. 16 is a longitudinal rib structure of the bottom girder block DZL1 (or the bottom girder block DQL 1) and the middle post Z1 (or the wall post QZ 1) at the bottom plate second post-pouring node DXJ2 (or the bottom plate first post-pouring node DXJ 1). Referring to fig. 12 to 16, the stepped side plates 10 of the side rail blocks function as side templates in the post-cast node beam height range.

Fig. 17 is a schematic diagram of a construction mode of longitudinal ribs of a wall column QZ1 and a beam block, which shows the longitudinal rib construction of the wall column QZ1 and a bottom beam block DHL1, a middle beam block ZHL and a top beam block THL1 at a joint, wherein the longitudinal ribs at the upper edges of the middle beam block ZHL and the top beam block THL1 are required to be bound and installed on site before pouring of a first post-pouring node ZXJ1 of a middle plate, a first post-pouring node TXJ of a top plate, a middle plate laminated layer ZXJ5 and a top plate laminated layer TXJ, and the rest longitudinal ribs are reserved reinforcing bars of prefabricated components.

Fig. 18 is a schematic diagram of a middle column Z1 and a longitudinal rib structure of a beam block, which shows the longitudinal rib structures of the middle column Z1 and a bottom beam block DHL1, a middle beam block ZHL and a top beam block THL1 at the joints, wherein the upper edge longitudinal ribs of the middle beam block ZHL and the top beam block THL1 are required to be bound and installed on site before the middle plate second post-pouring node ZXJ2 and the top plate second post-pouring node TXJ2 are poured with the middle plate laminated layer ZXJ5 and the top plate laminated layer TXJ, and the rest longitudinal ribs are reserved reinforcing bars for prefabricated components.

The foregoing is directed to illustrating the general principles and basic construction method of a subway station according to the present invention and is not intended to limit the invention to the specific structure, process and application scope thereof shown and described, but to any and all modifications and equivalents thereof which may be resorted to, falling within the scope of the invention as defined by the appended claims.

Claims

1. A method for constructing an assembled subway station comprises the following steps:

step 3, dismantling a foundation pit support structure support between the middle plate and the bottom plate, positioning and assembling a middle plate frame prefabricated member, connecting the steel bars in the post-pouring part of the beam column joint, completing concrete pouring of the cast-in-situ part of the middle plate frame, and realizing consolidation of the middle plate frame prefabricated member and a column member in the bottom plate prefabricated member;

step 4, after the middle plate is accurately drilled, positioning, paving and assembling a middle plate precast slab (ZB 1), binding superimposed slab steel bars on the upper part of the middle plate precast slab (ZB 1), and completing concrete pouring of a cast-in-place part of the surface of the middle plate;

step 5, assembling a first side wall block (Q1) between the middle plate and the bottom plate, and connecting steel bars in the post-cast part of the wallboard to finish the concrete pouring of the cast-in-situ part of the lower side wall;

step 7, after the top plate is accurately drilled, positioning, paving and assembling a top plate precast slab (TB 1), binding superimposed sheet steel bars on the top of the top plate precast slab (TB 1), and completing concrete pouring of a cast-in-place part of the top plate surface;

step 8, assembling a second side wall block (Q2) between the middle plate and the top plate, and connecting steel bars in the post-cast part of the wallboard to finish the concrete pouring of the cast-in-situ part of the upper side wall;

the bottom plate prefabricated part comprises a bottom longitudinal beam block (DZL 1), a bottom wall beam block (DQL 1), a bottom cross beam block (DHL 1), a wall column (QZ 1), a middle column (Z1) and a bottom plate block (DB 1); the bottom longitudinal beam blocks (DZL 1) and the bottom wall beam blocks (DQL 1) are arranged along the length direction of the station, the bottom transverse beam blocks (DHL 1) are arranged along the width direction of the station, the wall columns (QZ 1) and the middle columns (Z1) are arranged along the height direction of the station, the middle columns (Z1) are positioned at the intersecting positions of the bottom longitudinal beam blocks (DZL 1) and the bottom transverse beam blocks (DHL 1), and the wall columns (QZ 1) are positioned at the intersecting positions of the bottom wall beam blocks (DQL 1) and the bottom transverse beam blocks (DHL 1); the bottom plate block (DB 1) is positioned in a rectangular range surrounded by the bottom longitudinal beam block (DZL 1), the bottom wall beam block (DQL 1) and the bottom transverse beam block (DHL 1);

the floor cast-in-place portion comprises a floor first post-cast node (DXJ 1), a floor second post-cast node (DXJ 2) and a floor post-cast strip (DXJ 3); the first post-pouring node (DXJ 1) of the bottom plate is arranged at the end part of the bottom wall beam block (DQL 1) and the area where the end part of the bottom beam block (DHL 1) is intersected with the wall column (QZ 1) and is used for connecting the bottom wall beam block (DQL 1), the bottom beam block (DHL 1) and the wall column (QZ 1); the bottom plate second post-pouring node (DXJ 2) is arranged at the end part of the bottom longitudinal beam block (DZL 1) and the area where the end part of the bottom transverse beam block (DHL 1) is intersected with the middle column (Z1) and is used for connecting the bottom longitudinal beam block (DZL 1), the bottom transverse beam block (DHL 1) and the middle column (Z1); the bottom plate post-cast strip (DXJ 3) is arranged at a position where the bottom plate is subjected to bending moment and shearing force and is used for connecting a bottom longitudinal beam block (DZL 1), a bottom wall beam block (DQL 1), a bottom cross beam block (DHL 1) and a bottom plate block (DB 1).

2. The method for constructing a subway station according to claim 1, wherein: the middle plate frame prefabricated member comprises a middle longitudinal beam block (ZZL 1), a middle transverse beam block (ZHL 1), a middle wall beam block (ZQL 1), a wall column (QZ 1) and a middle vertical column (Z1). The middle longitudinal beam blocks (ZZL 1) and the middle wall beam blocks (ZQL 1) are arranged along the length direction of the station, the middle transverse beam blocks (ZHL 1) are arranged along the width direction of the station, and the wall columns (QZ 1) and the middle vertical columns (Z1) are arranged along the height direction of the station; the middle column (Z1) is positioned at the intersection position of the middle longitudinal beam block (ZZL 1) and the middle transverse beam block (ZHL 1), and the wall column (QZ 1) is positioned at the intersection position of the middle wall beam block (ZQL 1) and the middle transverse beam block (ZHL).

3. The method for constructing a subway station according to claim 2, wherein: the middle plate frame cast-in-situ part comprises a first middle plate post-cast node (ZXJ 1), a second middle plate post-cast node (ZXJ 2), a third middle plate post-cast node (ZXJ 3) and a fourth middle plate post-cast node (ZXJ 4); the middle plate first post-pouring node (ZXJ 1) is arranged at the end part of the middle beam block (ZHL) and in the area where the end part of the middle wall beam block (ZQL 1) is intersected with the wall column (QZ 1) and is used for connecting the middle beam block (ZHL 1), the middle wall beam block (ZQL 1) and the wall column (QZ 1); the middle plate second post-pouring node (ZXJ 2) is arranged at the end part of the middle cross beam block (ZHL), in the area where the end part of the middle longitudinal beam block (ZZL 1) is intersected with the middle vertical column (Z1), and is used for connecting the middle longitudinal beam block (ZZL 1), the middle cross beam block (ZHL) and the middle vertical column (Z1); the middle plate third post-pouring node (ZXJ 3) is arranged in a region where the end part of the middle beam block (ZHL) and the middle wall beam block (ZQL 1) cross the middle and is used for connecting the middle beam block (ZHL) and the middle wall beam block (ZQL 1); the middle plate fourth post-pouring node (ZXJ 4) is arranged in a region where the end part of the middle cross beam block (ZHL) and the middle longitudinal beam block (ZZL 1) cross the middle and is used for connecting the middle cross beam block (ZHL) and the middle longitudinal beam block (ZZL 1); the cast-in-place part of the middle plate surface is a middle plate laminated layer (ZXJ 5) formed by concrete poured on the top surface of the middle plate precast slab (ZB 1).

4. The method for constructing a subway station according to claim 1, wherein: the top plate frame prefabricated part comprises a top longitudinal beam block (TZL 1), a top transverse beam block (THL 1), a top wall beam block (TQL 1), a middle vertical column (Z1) and a wall column (QZ 1); top longitudinal beam blocks (TZL) and top wall beam blocks (TQL 1) are arranged along the length direction of a station, top transverse beam blocks (THL 1) are arranged along the width direction of the station, middle columns (Z1) and wall columns (QZ 1) are arranged along the height direction of the station, the middle columns (Z1) are located at the intersecting positions of the top longitudinal beam blocks (TZL) and the top transverse beam blocks (THL 1), and the wall columns (QZ 1) are located at the intersecting positions of the top wall beam blocks (TQL 1) and the top transverse beam blocks (THL 1).

5. The method for constructing a subway station according to claim 4, wherein: the cast-in-place part of the top plate frame comprises a top plate first post-pouring node (TXJ 1), a top plate second post-pouring node (TXJ), a top plate third post-pouring node (TXJ 3) and a top plate fourth post-pouring node (TXJ); the top plate first post-pouring node (TXJ 1) is arranged at the end part of the top beam block (THL 1) and the area where the end part of the top wall beam block (TQL 1) is intersected with the wall column (QZ 1) and is used for connecting the middle beam block (ZHL 1), the middle wall beam block (ZQL 1) and the wall column (QZ 1); the top plate second post-pouring node (TXJ 2) is arranged at the end part of the top beam block (THL 1) and the area where the end part of the top beam block (TZL) is intersected with the middle column (Z1) and is used for connecting the top beam block (TZL 1), the top beam block (THL 1) and the middle column (Z1); the third post-pouring node (TXJ 3) of the top plate is arranged in a region where the end part of the top beam (THL 1) and the midspan of the top wall beam block (TQL 1) are intersected and is used for connecting the top beam block (THL 1) and the top wall beam block (TQL 1); the top plate fourth post-pouring node (TXJ) is arranged in a region where the end part of the top cross beam (THL 1) and the midspan of the top longitudinal beam block (TZL) are intersected, and is used for connecting the top cross beam block (THL 1) and the top longitudinal beam block (TZL) together; the cast-in-place part of the top plate surface is a top plate laminated layer (TXJ 5) formed by concrete poured on the top surface of the top plate precast slab (TB 1).

6. A method of constructing a subway station according to any one of claims 2 to 5, wherein: the beam ends of the bottom longitudinal beam block (DZL 1), the bottom wall beam block (DQL 1), the middle longitudinal beam block (ZZZL 1), the middle wall beam block (ZQL 1), the top longitudinal beam block (TZL 1) and the top wall beam block (TQL 1) are provided with step-type side plates (10); the middle longitudinal beam block (ZZL 1), the middle wall beam block (ZQL 1), the top longitudinal beam block (TZL) and the top wall beam block (TQL 1) are provided with a middle-span groove (11); and end bosses (12) are arranged at beam ends of the middle wall beam block (ZQL 1) and the top wall beam block (TQL 1).

7. The method for constructing a subway station according to claim 6, wherein: the bottom wall beam block (DQL 1) is provided with an L-shaped beam section with a key groove, the middle wall beam block (ZQL 1) is provided with a T-shaped beam section with a key groove, and the top wall beam block (TQL 1) is provided with an L-shaped beam section with a key groove.