CN115387381A - Construction method of small block assembly type subway station based on glue splicing theory - Google Patents

Abstract

The invention discloses a construction method of a small block assembly type subway station based on a glue splicing theory, wherein the subway station consists of a plurality of first splicing rings and second splicing rings which are alternately arranged, the first splicing rings and the second splicing rings are tensioned and fixed by penetrating longitudinal prestressed tendons, the first splicing rings and the second splicing rings are spliced by a plurality of prefabricated components, the prefabricated blocks on the first splicing rings and the second splicing rings are arranged in a staggered manner, joints among the prefabricated blocks are connected by adopting a glue splicing process, and transverse prestressed tendons and vertical prestressed tendons are penetrated into the prefabricated blocks after connection and tensioned and fixed. The volume and the weight of each prefabricated block are reduced, and the transportation and the field construction are convenient; the positions of the joints of the wall, the column and the plate, which are easy to generate stress concentration, are all made into a prefabricated part, so that the stress performance of the weak structural joint can be improved; the connection is carried out by using the processing technology of glue splicing, RPC or UHPC wet joint, so that the stress and waterproof performance are improved, and the integral durability of the structure is further improved.

Description

Construction method of small block assembly type subway station based on glue splicing theory

Technical Field

The invention belongs to the technical field of underground building structures, and particularly relates to a construction method of a small block assembly type subway station based on a glue splicing theory.

Background

Along with the rapid development of the economy and the enhancement of the comprehensive national force of China, the urban construction scale of China is continuously enlarged, the urban population flow is increased, and the traffic condition is continuously worsened due to the trend that motor vehicles rise year by year. In order to improve the traffic environment, various measures are taken, among which the establishment of rail traffic is generally accepted.

At present, two construction methods of subway stations in China mainly comprise cast-in-place construction and prefabricated assembly, wherein the cast-in-place construction method has the defects of low construction efficiency, long construction period, large labor demand, high material and energy consumption, high construction waste and the like, and due to the difference of weather in the south and north, particularly the low temperature in the north in winter, the construction can be interrupted, and the subway construction period is further prolonged.

The prefabricated assembled structure has the advantages of high construction speed, short period, small influence of weather, small influence of environment and the like, and is widely applied in recent years. By using the fully prefabricated assembled structure, the construction time on site can be greatly saved, the cast-in-place construction amount and the construction waste are reduced, so that the cost is controlled, and the social benefit, the economic benefit and the environmental protection benefit of the whole line are improved.

However, the existing fabricated subway station has the following problems:

the 1 full ring generally comprises 9 prefabricated components, wherein the number of the prefabricated components of the bottom plate and the top plate is 1, and the number of the prefabricated components of the side wall is 2, so that the single prefabricated component is heavy, thereby causing inconvenient transportation and difficult assembly construction;

2 use shear bolt to connect prefabricated component's tenon and assemble seam department and be provided with multiple waterproof system, lead to waterproof construction process complicated, and the connection position of component can bear great shear force and moment of flexure, and the moment of flexure that adopts bolted connection to bear is less, and bolted connection passes power inhomogeneous, thereby easily causes the structure stress concentration to lead to the structure impaired to twist the complex operation of twisting the bolt.

Therefore, a construction method of a small block assembly type subway station based on a glue splicing theory needs to be designed to solve the problems.

Disclosure of Invention

The invention aims to solve the problem of providing a construction method of a small block assembly type subway station based on a glue splicing theory, which is used for solving the problems of difficulty in transportation and splicing of prefabricated parts and uneven force transmission of bolt connection.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

the utility model provides a construction method of little piecemeal assembled subway station based on glue spelling theory, subway station constitute by a plurality of first concatenation rings and the second concatenation ring that set up in turn, first concatenation ring with it is fixed through penetrating vertical prestressing tendons stretch-draw between the second concatenation ring, first concatenation ring with the second concatenation ring is become by a plurality of prefabricated component amalgamations, just first concatenation ring with the mutual stagger joint setting of prefabricated section on the second concatenation ring, the seam crossing between each prefabricated section adopts to glue the concatenation technology and connects, penetrates horizontal prestressing tendons and vertical prestressing tendons stretch-draw after connecting fixedly again.

Preferably, the first splicing ring and the second splicing ring respectively comprise a bottom plate structure, a middle plate structure, a top plate structure, a first side wall precast block and a second side wall precast block, the first side wall precast block is arranged between the bottom plate structure and the middle plate structure, and the second side wall precast block is arranged between the middle plate structure and the top plate structure.

So set up, be convenient for hoist and mount and equipment.

Preferably, the bottom plate structure comprises two bottom corner prefabricated blocks, a bottom plate center block is arranged between the two bottom corner prefabricated blocks, and the bottom plate center block is connected with the bottom corner prefabricated blocks through the bottom plate prefabricated blocks; the middle plate structure comprises two side wall center blocks, a middle plate center block is arranged between the two side wall center blocks, and the side wall center blocks are connected with the middle plate center block through middle plate precast blocks; the top plate structure comprises two top angle precast blocks, a top plate center block is arranged between the two top angle precast blocks, and the top angle precast blocks are connected with the top plate center block through the top plate precast blocks; the first side wall precast block is arranged between the bottom corner precast block and the side wall center blocks, and the second side wall precast block is arranged between the top corner precast block and the side wall center blocks.

So set up, can reduce the volume of single part, be convenient for transport.

Preferably, constitute first concatenation ring is inequality with the prefabricated section size of constitution second concatenation ring looks co-location, after the amalgamation first concatenation ring is the same with the whole size in second concatenation ring side, just on first concatenation ring the medium plate center block with be provided with the platform stand prefabricated section between the bottom plate center block medium plate center block with be provided with the station room stand prefabricated section between the roof center block.

So set up, improved the intensity of the seam crossing of amalgamation back structure, had the space effect of vertical biography power.

Preferably, preformed holes capable of allowing longitudinal prestressed tendons to penetrate through are reserved in the top corner precast block, the side wall center block, the bottom corner precast block, the top plate center block, the middle plate center block and the bottom plate center block, and the preformed holes in the first splicing ring and the second splicing ring are coaxial after splicing.

So set up, the joint strength between the splicing ring can be strengthened to the penetration of the vertical prestressing tendons of being convenient for. A construction method of a small block assembly type subway station based on a glue splicing theory is characterized by comprising the following steps:

firstly, excavating a foundation pit and erecting a protective support;

assembling and fixing the bottom corner prefabricated block, the bottom plate center block and the bottom plate prefabricated block on the ground, and then hoisting to the bottom of the foundation pit;

constructing a first side wall precast block on the bottom corner precast block;

splicing and fixing the side wall center block, the middle plate center block and the middle plate precast block on the ground, and hoisting the side wall center block, the middle plate center block and the middle plate precast block to the first side wall precast block;

constructing a second side wall prefabricated block on the side wall center block;

step six, splicing and fixing the top corner precast block, the top plate center block and the top plate precast block on the ground, and then hoisting the top corner precast block, the top plate center block and the top plate precast block to a second side wall precast block;

seventhly, alternately assembling a first splicing ring and a second splicing ring in sequence from the second step to the sixth step, wherein the first splicing ring is required to fix a platform upright column prefabricated block on the bottom plate central block before the fourth step of construction, and a station hall upright column prefabricated block is fixed on the middle plate central block before the sixth step of construction;

step eight, the first splicing ring and the second splicing ring after splicing need to keep mutual staggered joints, then integral tensioning is carried out, finally waterproof construction of the top plate is carried out, and earth is backfilled.

Preferably, the fixing mode in the second step, the fourth step and the sixth step is to connect joints among the prefabricated blocks through a glue splicing process, and then penetrate a transverse prestressed beam to perform tensioning and fixing.

So set up, the construction method is simple to seam crossing not only has higher mechanical properties after through building cementitious material bonding, can also waterproof seal.

Preferably, the first side wall precast block and the second side wall precast block in the third step and the fifth step are connected with the bottom corner precast block, the side wall center block and the top corner precast block by adopting a glue splicing process, and then vertical prestressed beams are penetrated for tensioning and fixing.

So set up, increased the holistic joint strength of station structure to ensure the leakproofness of station structure.

Preferably, in the step seven, the station stand column precast blocks and the station hall stand column precast blocks are connected with the bottom plate center block, the middle plate center block and the top plate center block by adopting an RPC or UHPC wet joint process, and then vertical prestressed bundles are penetrated for tensioning and fixing.

So set up, wet seam is for cast in situ concrete seam, can ensure the wholeness of structural connection through wet seam technology to adopt RPC or UHPC can ensure seam department pouring quality and joint strength.

Preferably, when the first splicing ring and the second splicing ring are fixed in the step eight, building structure glue is coated on the abutted surfaces, and then a longitudinal prestressed tendon is inserted into the preformed hole for tensioning and fixing.

So set up, can strengthen the joint strength between the concatenation ring, guarantee the bulk strength of station structure.

The invention has the advantages and positive effects that:

each prefabricated block in the invention has small volume and light weight, and is convenient for transportation and field construction.

2 the invention makes the positions of the wall, the column and the plate which are easy to generate stress concentration into a prefabricated component, and can improve the stress performance of the weak structure node.

3 the invention utilizes the processing technology of glue splicing, RPC or UHPC wet joint seam to connect prefabricated blocks of the prefabricated subway station, can improve the stress and waterproof performance of the prefabricated parts, and further increases the integral durability of the structure.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is an alternate staggered joint assembly schematic of a first splice ring and a second splice ring of the present invention;

FIG. 2 is a schematic view of a first split ring of the present invention;

FIG. 3 is a schematic view of a first split ring of the present invention;

FIG. 4 is a schematic structural diagram of a construction process according to step one of the present invention;

FIG. 5 is a schematic view of the hoisting of the bottom plate structure in step two of the present invention;

FIG. 6 is a schematic view of the installation of a first prefabricated wall block according to a third step of the present invention;

FIG. 7 is a schematic diagram of the hoisting of the middle plate structure in step four of the present invention;

FIG. 8 is a schematic view of a structure in which a first prefabricated side wall block and a panel structure are tensioned by vertical prestressing tendons according to the present invention;

FIG. 9 is a schematic view of the installation of a second side wall preform block in step five of the present invention;

FIG. 10 is a schematic illustration of the hoisting of the top plate structure in step six of the present invention;

FIG. 11 is a schematic view of a top plate structure and a second side wall precast block of the present invention being tensioned by vertical prestressing tendons;

FIG. 12 is a schematic view of the structure of the present invention tensioned by longitudinal prestressing tendons;

FIG. 13 is a schematic sectional view of the structure of adjacent precast blocks at the joint seam through tensioning of prestressed tendons and gluing.

The reference numerals are illustrated below:

1. a building envelope; 2. a protective support; 3. a first split ring; 4. a second split ring; 341. a floor structure; 3411. a bottom corner prefabricated section; 3412. a bottom plate precast block; 3413. a bottom plate center block; 342. a middle plate structure; 3421. a side wall center block; 3422. middle plate precast blocks; 3423. a middle plate center block; 343. a top plate structure; 3431. a top angle precast block; 3432. a top plate precast block; 3433. a top plate center block; 344. a first side wall precast block; 345. a second side wall precast block; 346. a platform upright column prefabricated block; 347. station hall upright column precast blocks; 5. transverse prestressed tendons; 6. a vertical prestressing tendon; 7. longitudinal prestressed tendons; 8. holes are reserved.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description and the description of the attached drawings, the specific connection mode of each part adopts the conventional means such as mature bolts, rivets, welding and the like in the prior art, the machines, parts and equipment adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, so the detailed description is omitted.

The invention will be further described with reference to the accompanying drawings in which:

example 1

As shown in fig. 1-13, a construction method of a small-block assembly type subway station based on glue splicing theory, the subway station is composed of a plurality of first splicing rings 3 and second splicing rings 4 which are alternately arranged, the first splicing rings 3 and the second splicing rings 4 are tensioned and fixed by penetrating longitudinal prestressed tendons 7, the first splicing rings 3 and the second splicing rings 4 are spliced by a plurality of prefabricated components, the prefabricated blocks on the first splicing rings 3 and the second splicing rings 4 are arranged in a staggered manner, seams among the prefabricated blocks are connected by adopting a glue splicing process, a cementing material adopted by glue splicing is epoxy resin, and the transverse prestressed tendons 5 and the vertical prestressed tendons 6 are tensioned and fixed after connection.

Specifically, the first splicing ring 3 and the second splicing ring 4 both include a bottom plate structure 341, a middle plate structure 342, a top plate structure 343, a first side wall prefabricated section 344 and a second side wall prefabricated section 345, the first side wall prefabricated section 344 is disposed between the bottom plate structure 341 and the middle plate structure 342, and the second side wall prefabricated section 345 is disposed between the middle plate structure 342 and the top plate structure 343, so that the hoisting and assembling are facilitated.

Further, the bottom plate structure 341 includes two bottom corner prefabricated blocks 3411, a bottom plate center block 3413 is disposed between the two bottom corner prefabricated blocks 3411, and the bottom plate center block 3413 is connected to the bottom corner prefabricated blocks 3411 through the bottom plate prefabricated blocks 3412; the middle plate structure 342 includes two side wall center blocks 3421, a middle plate center block 3423 is disposed between the two side wall center blocks 3421, and the side wall center block 3421 and the middle plate center block 3423 are connected by a middle plate prefabricated block 3422; the top plate structure 343 comprises two top angle prefabricated blocks 3431, a top plate center block 3433 is arranged between the two top angle prefabricated blocks 3431, and the top angle prefabricated blocks 3431 and the top plate center block 3433 are connected through top plate prefabricated blocks 3432; first side wall precast block 344 is disposed between bottom corner precast block 3411 and side wall center block 3421, and second side wall precast block 345 is disposed between top corner precast block 3431 and side wall center block 3421, so that the size of the single part can be reduced, and transportation is facilitated.

It should be noted that the prefabricated blocks forming the same positions of the first splicing ring 3 and the second splicing ring 4 are different in size, the overall sizes of the first splicing ring 3 and the second splicing ring 4 after splicing are the same, a platform upright column prefabricated block 346 is arranged between a middle plate central block 3423 on the first splicing ring 3 and a bottom plate central block 3413, and a station hall upright column prefabricated block 347 is arranged between the middle plate central block 3423 and a top plate central block 3433, so that staggered splicing is realized, the strength of the joint of the spliced structure is improved, and the space effect of longitudinal force transmission is achieved.

Reserved holes 8 capable of enabling longitudinal prestressed bundles 7 to penetrate are reserved in the top corner prefabricated block 3431, the side wall central block 3421, the bottom corner prefabricated block 3411, the top plate central block 3433, the middle plate central block 3423 and the bottom plate central block 3413, the reserved holes 8 in the first splicing ring 3 and the second splicing ring 4 after splicing are coaxial, the longitudinal prestressed bundles 7 are convenient to penetrate through due to the arrangement, and the connecting strength between the splicing rings can be enhanced.

The specific construction process of the embodiment is as follows:

firstly, excavating a foundation pit, inserting the enclosure structure 1 into a position where the foundation pit needs to be excavated before excavating the foundation pit, constructing the maintenance structure in place firstly by adopting a construction mode of wall protection grooving, and gradually erecting a plurality of protection supports 2 in the process of excavating the foundation pit to ensure the safety of excavation of the foundation pit;

secondly, after the excavation of the foundation pit is completed, the assembly work of the subway station bottom plate structure 341 needs to be completed on the ground, the mechanism of the platform bottom plate needs to be assembled at first, two bottom corner prefabricated blocks 3411 are placed on the ground during the assembly, then the bottom plate center block 3413 is placed between the two bottom corner prefabricated blocks 3411, then a corresponding number of bottom plate prefabricated blocks 3412 are prevented between the bottom corner prefabricated blocks 3411 and the bottom plate center block 3413, the specific number of the bottom plate prefabricated blocks 3412 needs to be determined according to the size of the subway station and the size of the bottom plate prefabricated blocks 3412, then the connecting surfaces of the bottom plate prefabricated blocks 3412, the bottom plate center blocks 3413 and the bottom corner prefabricated blocks 3411 are bonded in a glue splicing mode, the bottom plate prefabricated blocks 3413 are spliced into a whole, finally, a transverse prestress beam 5 is penetrated for tensioning, after the tensioning is completed, the whole is hoisted to the bottom of the foundation pit and a cushion layer is laid between the bottom of the foundation pit and the bottom plate structure 341.

And thirdly, fixing and constructing the first side wall precast block 344 on the two bottom corner precast blocks 3411 hoisted to the foundation pit floor structure 341, wherein during construction, the first side wall precast block 344 and the bottom corner precast blocks 3411 are connected into a whole in a glue splicing mode, and then are radially tensioned through the vertical prestressed beams 6.

It should be noted that a platform column prefabricated block 346 needs to be constructed on the bottom plate center block 3413 of the first splicing ring 3, and when the platform column prefabricated block 346 is constructed, joints of the prefabricated blocks are connected through an RPC or UHPC wet joint process, and then vertical prestressed tendons 6 are penetrated for tensioning.

Fourthly, then, the middle plate structure 342 is assembled on the ground, during assembly, one middle plate center block 3423 is placed between two side wall precast blocks, then a corresponding number of middle plate precast blocks 3422 are placed between the side wall precast blocks and the middle plate center block 3423, the number of the middle plate precast blocks 3422 is determined according to the size of the subway station and the size of the middle plate precast blocks 3422, then the precast blocks are connected into a whole in a glue splicing mode, then, a transverse prestressed beam 5 penetrates through the precast blocks for tensioning, after tensioning is completed, the whole is hoisted to two first side wall precast blocks 344 which are installed, the connection is performed at a joint in a glue splicing mode, and then, tensioning is performed after penetrating a vertical prestressed beam 6.

If the middle plate structure 342 on the first splicing ring 3 is hoisted, the joint of the platform upright column prefabricated block 346 and the middle plate central block 3423 needs to be treated by an RPC or UHPC wet seaming process, and meanwhile, vertical prestressed bundles are penetrated for tensioning.

Fifthly, fixing and constructing second side wall precast blocks 345 on the two side wall central blocks 3421 of the fixed middle plate structure 342, connecting the second side wall precast blocks 345 and the side wall central blocks 3421 into a whole in a glue splicing mode during construction, and then radially tensioning through vertical prestressed beams 6.

It should be noted that a station hall upright column prefabricated block 347 is also required to be constructed on the middle plate center block 3423 of the first splicing ring 3, and when the station hall upright column prefabricated block 347 is constructed, a RPC or UHPC wet joint process is adopted to connect the joints, and then the vertical prestressed beams 6 are penetrated for tensioning.

Sixthly, assembling the middle plate structure 342 on the ground, during assembly, firstly placing a top plate central block 3433 between two top angle prefabricated blocks 3431, then placing a corresponding number of top plate prefabricated blocks 3432 between the top angle prefabricated blocks 3431 and the top plate central block 3433, determining the number of the top plate prefabricated blocks 3432 according to the size of the subway station and the size of the middle plate prefabricated blocks 3422, then connecting all the prefabricated blocks into a whole in a glue splicing mode, penetrating a transverse prestressed beam 5 for tensioning, after tensioning is completed, integrally hoisting the prefabricated blocks onto two second side wall prefabricated blocks 345 which are installed, connecting the prefabricated blocks at a joint in a glue splicing mode, and penetrating a vertical prestressed beam 6 for tensioning.

If the middle plate structure 342 on the first splicing ring 3 is hoisted, the station hall upright column prefabricated block 347 and the top plate central block 3433 are connected in an RPC or UHPC wet joint mode and are tensioned through a vertical prestress beam.

And seventhly, sequentially and alternately finishing the assembly work of each first splicing ring and the second splicing interchange on the subway station according to the construction process from the second step to the sixth step.

Step eight, because the sizes of the prefabricated blocks on the first splicing ring 3 and the second splicing ring 4 are different, and the overall sizes of the assembled first splicing ring 3 and the assembled second splicing ring 4 are the same, so that the seams between the prefabricated blocks on the first splicing ring 3 and the assembled second splicing ring 4 are not in the same position, thereby realizing the staggered joint assembly, so that the adjacent first splicing ring 3 and the second splicing ring 4 have the space function of longitudinal force transmission, the rigidity and the seam strength are higher, and because the overall sizes of the assembled first splicing ring 3 and the assembled second splicing ring are the same, the positions of the first splicing ring 3 and the second splicing ring 4 corresponding to the reserved holes 8 on the prefabricated blocks are the same and coaxial, the longitudinal prestressed tendons 7 can penetrate through, the longitudinal prestressed tendons 7 penetrate through the reserved holes 8, a plurality of groups of splicing rings are fixedly connected into a whole, finally, the waterproof layer is tensioned on the waterproof layer 342, the construction is finished, and the earth is tensioned, and the road surface is backfilled.

Abbreviations, english and key terms in the invention are defined and explained:

stress concentration: is a phenomenon in which stress is significantly increased in a solid local area. The method is mainly used for solving the problems of sharp corners, holes, gaps, grooves, rigid constraint positions and adjacent areas. Stress concentration can cause brittle materials to fracture; causing fatigue cracking of brittle and plastic materials.

Gluing and splicing: the prefabricated bridge sections are connected by adopting a cementing material. The epoxy resin is preferred in the invention, and the epoxy resin adhesive has high elastic modulus, high gelling property, high stress transfer characteristic, low dripping property in construction, construction lubricating property and high waterproof property after construction. And the mechanical property after curing is not lower than each strength index of the concrete.

Assembling staggered joints: the prefabricated part assembly type with the longitudinal seams on different straight lines along the structure. In the assembly type, the adjacent prefabricated part rings have a space effect of longitudinal force transmission, and the rigidity and the joint strength are higher.

RPC: i.e., RPC concrete, reactive powder concrete (reactive powder concrete). The fine sand is used as aggregate, a large amount of mineral admixtures such as silica fume and the like, a high-efficiency water reducing agent and fine steel fibers are added, a weak interface is greatly strengthened, the fracture energy is improved by more than two orders of magnitude, and the concrete material with high strength, high toughness and low porosity is formed.

UHPC: namely UHPC Concrete, ultra High Performance Concrete (Ultra High Performance Concrete), is known for its "three High", i.e. High durability, high workability, high strength.

And (3) wet seaming: and (5) casting concrete joints in situ. The width of the steel plate is 0.10-0.20 m, which is suitable for pipe joints, steel bar welding, concrete pouring, vibration and other operations. The joint concrete is multipurpose early strength cement, and the size of the aggregate is selected to ensure the tamping compaction.

The prestressed tendon tensioning is that prestressed tensioning, the prestressed tendon generally adopts steel strand wires, prestressed tensioning is that tension is added in advance in the component, so that the applied prestressed tensioning component bears compressive stress, and further the component generates certain deformation to deal with the load of the structure, including the load of the component's own weight, wind load, snow load, earthquake load effect, and the like. Generally, the steel strand, the jack, the anchor plate and the clamping piece are used for tensioning.

Although one embodiment of the present invention has been described in detail, the above description is only a preferred embodiment of the present invention, and the present invention is only illustrated in the form of block, which should not be construed as limiting the scope of the present invention. However, the small block assembly type subway structure, in which the sections of the subway structure are connected by using the glue splicing process, or the equivalent changes and improvements made according to the application scope of the present invention, should still fall within the scope covered by the present invention.

Claims (10)

1. The utility model provides a little piecemeal assembled subway station based on glue and piece together theory which characterized in that: subway station constitute by first concatenation ring (3) and second concatenation ring (4) that a plurality of alternative set up, first concatenation ring (3) with it is fixed through penetrating vertical prestressing tendons (7) stretch-draw between second concatenation ring (4), first concatenation ring (3) with second concatenation ring (4) are become by a plurality of prefabricated component amalgamations, just first concatenation ring (3) with the mutual stagger joint setting of prefabricated component on second concatenation ring (4), seam crossing between each prefabricated section sets up the stagnant water strip and adopts gluey concatenation technology to connect seam crossing, and each prefabricated section after the connection penetrates horizontal prestressing tendons (5) and vertical prestressing tendons (6) stretch-draw fixedly again.

2. The small-block assembly type subway station based on the glue splicing theory as claimed in claim 1, wherein: the first and second split rings (3, 4) each comprise a bottom plate structure (341), a middle plate structure (342), a top plate structure (343), a first side wall precast block (344) and a second side wall precast block (345), the first side wall precast block (344) being disposed between the bottom plate structure (341) and the middle plate structure (342), the second side wall precast block (345) being disposed between the middle plate structure (342) and the top plate structure (343).

3. The small-block assembly type subway station based on the glue splicing theory as claimed in claim 2, wherein: the bottom plate structure (341) comprises two bottom corner precast blocks (3411), a bottom plate center block (3413) is arranged between the two bottom corner precast blocks (3411), and the bottom plate center block (3413) is connected with the bottom corner precast blocks (3411) through bottom plate precast blocks (3412); the middle plate structure (342) comprises two side wall center blocks (3421), a middle plate center block (3423) is arranged between the two side wall center blocks (3421), and the side wall center blocks (3421) are connected with the middle plate center block (3423) through middle plate prefabricated blocks (3422); the top plate structure (343) comprises two top angle prefabricated blocks (3431), a top plate center block (3433) is arranged between the two top angle prefabricated blocks (3431), and the top angle prefabricated blocks (3431) are connected with the top plate center block (3433) through top plate prefabricated blocks (3432); the first side wall precast block (344) is disposed between the bottom corner precast block (3411) and the side wall center block (3421), and the second side wall precast block (345) is disposed between the top corner precast block (3431) and the side wall center block (3421).

4. The small block assembly type subway station based on the glue splicing theory as claimed in claim 3, wherein: the sizes of prefabricated blocks forming the same positions of the first splicing ring (3) and the second splicing ring (4) are different, the overall sizes of the sides of the first splicing ring (3) and the second splicing ring (4) after splicing are the same, a platform upright post prefabricated block (346) is arranged between the middle plate central block (3423) and the bottom plate central block (3413) on the first splicing ring (3), and a station hall upright post prefabricated block (347) is arranged between the middle plate central block (3423) and the top plate central block (3433).

5. The small-block assembly type subway station based on the glue splicing theory as claimed in claim 4, wherein: reserved holes (8) capable of enabling longitudinal prestress bundles (7) to penetrate are reserved in the top angle prefabricated block (3431), the side wall central block (3421), the bottom angle prefabricated block (3411), the top plate central block (3433), the middle plate central block (3423) and the bottom plate central block (3413), and the reserved holes (8) in the first splicing ring (3) and the second splicing ring (4) after splicing are coaxial.

6. A construction method of a small block assembly type subway station based on a glue splicing theory is characterized by comprising the following steps:

firstly, excavating a foundation pit and erecting a protective support (2);

step two, assembling and fixing the bottom corner precast block (3411), the bottom plate center block (3413) and the bottom plate precast block (3412) on the ground, and then hoisting the bottom corner precast block, the bottom plate center block and the bottom plate precast block to the bottom of the foundation pit;

thirdly, constructing a first side wall precast block (344) on the bottom corner precast block (3411);

step four, assembling and fixing the side wall center block (3421), the middle plate center block (3423) and the middle plate precast block (3422) on the ground, and hoisting the side wall center block, the middle plate center block (3423) and the middle plate precast block (3422) to the first side wall precast block (344);

step five, constructing a second side wall prefabricated block (345) on the side wall central block (3421);

step six, assembling and fixing the top corner precast block (3431), the top plate center block (3433) and the top plate precast block (3432) on the ground, and then hoisting the top corner precast block, the top plate center block and the top plate precast block to a second side wall precast block (345);

seventhly, alternately assembling a first splicing ring (3) and a second splicing ring (4) in sequence from the second step to the sixth step, wherein the first splicing ring (3) needs to fix a station upright column prefabricated block (346) on a bottom plate central block (3413) before the fourth step of construction, and fix a station hall upright column prefabricated block (347) on a middle plate central block (3423) before the sixth step of construction;

step eight, the first splicing ring (3) and the second splicing ring (4) need to keep mutual staggered joints after splicing, then integral tensioning is carried out, and finally waterproof construction of the top plate is carried out, and earth is backfilled.

7. The construction method of the small block assembly type subway station based on the glue splicing theory as claimed in claim 6, characterized in that: the second step, the fourth step and the sixth step are fixed in a mode that joints among the prefabricated blocks are connected through a glue splicing process, and then transverse prestressed tendons (5) penetrate through the joints to be tensioned and fixed.

8. The construction method of the small block assembly type subway station based on the glue splicing theory as claimed in claim 6, characterized in that: and in the third step and the fifth step, the first side wall precast block (344) and the second side wall precast block (345) are connected with the bottom corner precast block (3411), the side wall center block (3421) and the top corner precast block (3431) by adopting a glue splicing process, and then vertical prestress beams (6) are penetrated for tensioning and fixing.

9. The construction method of the small block assembly type subway station based on the glue splicing theory as claimed in claim 6, characterized in that: in the seventh step, the station stand column prefabricated block (346) and the station hall stand column prefabricated block (347) are connected with the bottom plate center block (3413), the middle plate center block (3423) and the top plate center block (3433) through RPC or UHPC wet joint technology, and then vertical prestress beams (6) are penetrated for tensioning and fixing.

10. The construction method of the small block assembly type subway station based on the glue splicing theory as claimed in claim 6, characterized in that: and in the step eight, when the first splicing ring (3) and the second splicing ring (4) are fixed, building structure glue is coated on the binding surface, and then a longitudinal prestress beam (7) penetrates into the preformed hole (8) and is tensioned and fixed.

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