CN210086295U - Compound assembled underground structure - Google Patents
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- CN210086295U CN210086295U CN201920607857.8U CN201920607857U CN210086295U CN 210086295 U CN210086295 U CN 210086295U CN 201920607857 U CN201920607857 U CN 201920607857U CN 210086295 U CN210086295 U CN 210086295U
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Abstract
The utility model discloses a composite assembly type underground structure, which comprises an underground wall, a steel structure clamping groove, a prestress jack and a main structure upright post; the prefabricated top longitudinal beam, the prefabricated top plate, the top plate cast-in-place layer and the top plate waterproof layer form a composite waterproof prestressed top plate together; the prefabricated middle longitudinal beam, the prefabricated middle plate and the middle plate cast-in-place layer form a composite middle plate together; the prefabricated cushion layer, the bottom plate waterproof layer and the cast-in-place bottom plate form a composite waterproof bottom plate together; the underground wall, the side wall waterproof layer and the side wall cast-in-place layer form a composite waterproof wall together; the composite waterproof prestressed top plate, the composite prestressed middle plate, the composite waterproof bottom plate and the composite waterproof wall are effectively connected to form a fully-enclosed waterproof fully-composite assembled underground structure; therefore, the problem of water leakage of the fully-assembled underground structure is solved, the limitation of the application range of the assembled underground structure is broken through, the method can be applied to water-rich strata, areas with complex surrounding environment and high deformation control, and the method can powerfully promote the wide application of the assembled structure in underground engineering.
Description
Technical Field
The utility model belongs to the underground works field, concretely relates to compound assembled underground structure is particularly useful for compound assembled subway station structure.
Background
The existing underground structure engineering such as a subway station structure has two structural forms, namely an assembled underground structure and a full open cut cast-in-place underground structure, but the existing underground structure engineering has respective defects.
Problems with fabricated underground structures include:
(1) in the assembly type, only one waterproof system is prefabricated, and large leakage hidden danger exists at seams and nodes; the waterproof grade of the underground structure is one grade, water leakage is not allowed, and no wet stain exists on the surface of the structure; therefore, in water-rich areas, the application of the assembled underground structure is greatly restricted, and the application is few at home at present;
(2) the fully-assembled underground structure cannot be provided with the inner support due to construction and equipment requirements, so that the fully-assembled underground structure is only suitable for areas with good geological conditions and available anchor cables for replacing the inner support; the anchor cable support application of the deep foundation pit in the middle, south, southeast soft soil and water-rich areas is controlled and prohibited, so that the application of the fully-assembled underground structure is greatly restricted and cannot be popularized and applied;
(3) only an underground two-layer structure with simple rules is applicable, and underground three-layer, four-layer or three-span four-span structures and the like can not be applied, so that standardization and large-area popularization and application are difficult to realize, and the economic effect is not high;
(4) the prefabricated member of the fully-assembled structure has the advantages of heavy weight, complex member type, high assembly difficulty, high precision requirement and extremely high requirement on construction process and equipment.
Due to the problems of the fully-assembled type, the fully-assembled type can not be popularized and applied, and only the pilot test work is carried out in individual cities.
The cast-in-place underground structure of full open cut is now generally applied to underground works, and the problem that exists includes:
(1) a large amount of concrete supports, scaffolds and templates are crossed, earthwork excavation is performed, the construction environment is poor, and the quality is difficult to ensure;
(2) a large amount of concrete supports are poured and broken, steel supports are erected, and a template system is constructed, so that the construction period is long, and the investment is high;
(3) the open cut deformation is large, particularly for ultra-deep foundation pits, a large number of concrete supports and steel supports are required to be arranged for protecting the surrounding environment, and the investment cost of temporary engineering is extremely high;
(4) the equipment is integrated with the pipeline, and fixed supports such as anchor bolts or expansion bolts are used for constructing the pipeline, so that cast-in-place concrete is damaged to a certain extent, the quality of the anchor bolts is difficult to effectively ensure, the durability is poor, regular replacement and maintenance are required, the maintenance difficulty is high, and the cost is high;
(5) the cast-in-place rail top air duct has high construction difficulty and long period, and is a pain point and a difficulty point of a construction site.
Therefore, the key technical problems to be solved by underground structures such as subway stations include:
(1) the fully-assembled underground structure has many seams and outstanding waterproof problem;
(2) the fully assembled underground structure can not be provided with an inner support, and the application range of soft soil and water-rich areas is greatly limited;
(3) the gaps among the prefabricated components of the fully-assembled underground structure are large, the stress transmission is not uniform, the integral structure cannot be formed, the deformation inside and outside the foundation pit cannot be well adapted, and potential safety hazards exist;
(4) the open cut cast-in-place underground structure temporary engineering (inner support and template) has high investment, long construction period, high cost and time consumption and influences the construction quality;
(5) the problems of poor fixing and mounting quality, poor durability and high maintenance cost of the comprehensive pipeline of the underground structure;
(6) the rail top air duct is generally constructed after the completion of a station main body, and has narrow construction space, high difficulty and long period.
SUMMERY OF THE UTILITY MODEL
At least one in defect or improvement demand more than prior art, the utility model provides a compound assembled underground structure and contrary construction method of doing has overcome the problem of full assembled underground structure percolating water, has broken through the limitation of assembled underground structure range of application, can use in rich water stratum, the surrounding environment is complicated, the high area of deformation control, can impel the wide application of assembled structure in underground works forcefully. The utility model replaces a large number of inner supports and templates of the conventional open cut cast-in-place structure, thereby saving investment; meanwhile, the prefabricated part can be pre-stressed, deformation of the assembled gap is balanced and offset, the surrounding environment can be effectively protected, and the safety of the foundation pit is ensured. The prefabricated part is manufactured in a factory and constructed mechanically, high quality and superior quality of underground structural engineering are achieved, traditional ceiling decoration is replaced, comprehensive pipeline standardization and mechanical installation are achieved through the pre-buried channel, investment and construction period are saved, green construction is achieved, energy is saved, environment is protected, the technology is advanced, sustainable development and green construction are achieved, practicability is high, and the underground structural engineering system has wide application space in the field of underground engineering.
To achieve the above object, according to an aspect of the present invention, there is provided a composite assembly type underground structure, wherein:
comprises an underground wall and a main structure upright post; the top of the underground wall is provided with a crown beam and a steel structure clamping groove for mounting the prefabricated middle plate in a pre-buried manner in the middle; the top of the main structure upright post is provided with a prefabricated top longitudinal beam, and the middle part of the main structure upright post is provided with a prefabricated middle longitudinal beam; a top plate prestress jack is arranged between the crown beam and the prefabricated top plate, and a middle plate prestress jack is arranged between the steel structure clamping groove and the prefabricated middle plate;
the composite waterproof prestressed top plate is formed by the prefabricated top longitudinal beams, the prefabricated top plates arranged between the crown beam and the prefabricated top longitudinal beams, the prefabricated top plates arranged between two adjacent prefabricated top longitudinal beams, a top plate cast-in-place layer on the top plate and a top plate flexible waterproof layer on the top plate cast-in-place layer;
the composite prestress middle plate is formed by the prefabricated middle longitudinal beams, the prefabricated middle plates arranged between the steel structure clamping grooves and the prefabricated middle longitudinal beams, the prefabricated middle plates arranged between every two adjacent prefabricated middle longitudinal beams and a middle plate cast-in-place layer on the middle plate;
the prefabricated cushion layer, the bottom plate waterproof layer and the cast-in-place bottom plate which are sequentially arranged on the substrate from bottom to top form a composite waterproof bottom plate;
the underground wall and the side wall waterproof layer and the side wall cast-in-place layer which are sequentially arranged on the underground wall in the inward direction form a composite waterproof wall together;
the composite waterproof prestressed top plate, the composite prestressed middle plate, the composite waterproof bottom plate and the composite waterproof wall are all effectively connected to form a fully-enclosed waterproof fully-composite assembled underground structure.
Preferably, the prefabricated roof has prefabricated pipe support through the embedded groove suspension, forms whole prefab.
Preferably, the prefabricated middle plate is suspended with a prefabricated pipeline support and a prefabricated rail top air duct through an embedded groove, and is provided with a embedded pipeline sleeve in a vertical through mode to form an integral prefabricated part.
Preferably, the main structure column comprises a pile foundation and a steel column, the steel column is inserted into the pile foundation, and the steel column adopts a steel pipe concrete column, section steel concrete or outer concrete to form the steel pipe concrete composite column.
Preferably, a groove is reserved on the inner side of the crown beam, protruding tongues and grooves are reserved on two sides of the prefabricated top longitudinal beam, and protruding tongues and grooves are reserved on two sides of the prefabricated middle longitudinal beam.
The above-described preferred features may be combined with each other as long as they do not conflict with each other.
Generally, through the utility model discloses above technical scheme who conceives compares with prior art, has following beneficial effect:
(1) environmental protection and energy saving, green construction: the construction and the demolition work of the concrete-free inner support are realized, a large number of steel supports, scaffolds and templates do not need to be erected, and the construction is environment-friendly, energy-saving and green.
(2) The composite structure has high quality and good waterproof performance: through cast-in-place one deck concrete on prefabricated component, establish the flexible waterproof layer again, this kind of cast-in-place, prefabricate, waterproof "waterproof full compound assembled underground structure of wrap entirely of flexible" trinity, overcome assembled structure waterproof problem and application limitation, waterproof quality and performance promote greatly, can satisfy the waterproof and durability requirement of rich water stratum century engineering, can impel the wide application of compound assembled structure in underground engineering forcefully.
(3) The construction speed is fast, saves the time limit for a project: a large amount of concrete supports do not need to be constructed, and the construction period and hardening period of the inner support are shortened; the inner support system is formed by assembling prefabricated parts, so that the efficiency is high and the speed is high; the cast-in-place concrete layer and the lower earthwork excavation can be carried out synchronously, and the earthwork excavation is finished; the cast-in-place structure is prefabricated to form a dry working environment, so that the cast-in-place structure is not interfered by wind, frost, rain and snow and is free from obstruction in the wind and rain. According to the construction unearthed feeding requirement, a certain number of unearthed feeding holes are longitudinally arranged in the station main body at intervals. The composite force of the points can greatly save the construction period and accelerate the construction progress. After the top plate precast beam slab system, the cast-in-place layer and the waterproof layer are completed, pipelines can be moved back, backfilling and earthing are carried out, traffic is recovered, and the influence on urban traffic and pipelines can be reduced.
(4) An inner support and a template system are not needed, so that the engineering investment is saved: utilize the advantage of prefabricated component high efficiency, quick shaping, replace underground works's interior support and scaffold form system, from last up down reverse construction underground major structure need not to set up a large amount of concrete shotcrete, steel shotcrete and interim stand, also need not to set up a large amount of scaffolds and template, can save the engineering investment greatly.
(5) The prefabricated assembly component is provided with the axial pressure pre-applying device, so that axial pressure can be pre-applied to the prefabricated beam plate component, deformation of the assembly gap can be balanced and offset, the surrounding environment can be effectively protected, and the safety of a foundation pit is ensured. The worse geological condition and the deeper, wider and bigger foundation pit are, the more prominent the advantages of the prefabricated and cast-in-place concrete inner support system are, and the higher the economic effect is.
(6) The plain concrete style is realized, and decoration is replaced: by adopting the steel die with the ribs and the file, the prefabricated structure with good quality and certain three-dimensional effect is realized, the traditional decoration is replaced, and the investment is saved.
(7) Through pre-buried channel on prefabricated component, hang pipeline equipment, can realize mechanized installation and assembled construction, replace the traditional method of punching big expansion bolts, improve durability and quality, effectively solved traditional crab-bolt fixed problem.
(8) The prefabricated rail top air channel is manufactured in a factory and installed mechanically, so that the construction difficulty of the cast-in-place concrete rail top air channel can be reduced, the efficiency and the quality are improved, and the construction progress is accelerated.
Drawings
FIG. 1 is an overall elevational schematic view of the composite fabricated underground structure of the present invention;
FIG. 2 is one of the process schematic diagrams of the reverse construction method of the composite fabricated underground structure of the present invention;
FIG. 3 is a second schematic process diagram of the reverse construction method of the composite fabricated underground structure of the present invention;
fig. 4 is a third process schematic diagram of the reverse construction method of the composite fabricated underground structure of the present invention;
FIG. 5 is an overall schematic view of the completed composite fabricated underground structure of the present invention;
fig. 6 is a flow diagram of the reverse construction method of the composite assembly type underground structure of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. The present invention will be described in further detail with reference to the following embodiments.
As a preferred embodiment of the present invention, as shown in fig. 1 and 5, the present invention provides a composite assembly type underground structure, wherein:
comprises an underground wall 1 and a main structure upright post; the top of the underground wall is provided with a crown beam 5 and a steel structure clamping groove 2 for pre-embedding and installing the prefabricated middle plate in the middle part, the steel structure clamping groove is used for positioning and supporting the prefabricated middle plate when the prefabricated middle plate is hoisted, the height of the clamping groove is greater than the thickness of the middle plate, and the middle plate can still be ensured to be positioned at the designed elevation by allowing relative movement of the clamping groove and the middle plate when the elevation of the underground wall; the top of the main structure upright post is provided with a prefabricated top longitudinal beam 8, and the middle part of the main structure upright post is provided with a prefabricated middle longitudinal beam 15. The main structure upright column comprises a pile foundation 3 and a steel upright column 4, wherein the steel upright column 4 needs to be inserted into the pile foundation 3 to a certain depth, so that the reliable combination of the pile foundation 3 and the steel upright column is ensured; the steel upright column 4 is formed into a steel pipe concrete composite column by adopting a steel pipe concrete column, section steel concrete or outer concrete. A top plate prestress jack 11 is arranged between the crown beam 5 and the prefabricated top plate 9, and a middle plate prestress jack 19 is arranged between the steel structure clamping groove 2 and the prefabricated middle plate 16. Considering that certain errors need to be reserved for installation and positioning of the prefabricated parts, transverse prestress is respectively applied to the prefabricated parts of the top plate and the middle plate through the top plate prestress jack 11 and the middle plate prestress jack 19 to balance and offset the reserved errors, deformation of the underground wall is controlled, and safety and stability of the foundation pit and the surrounding construction are guaranteed. Each prefabricated plate is tensioned and locked into a whole in the longitudinal direction (in-paper direction) by adopting prestressed reinforcements or locking steel rods section by section.
The composite waterproof prestressed roof is formed by the prefabricated roof longitudinal beams 8, the prefabricated roof plates 9 arranged between the crown beams 5 and the prefabricated roof longitudinal beams 8, the prefabricated roof plates 9 arranged between two adjacent prefabricated roof longitudinal beams 8, the roof plate cast-in-situ layer 12 on the roof plates and the roof plate flexible waterproof layer 13 on the roof plate cast-in-situ layer.
The composite prestress middle plate is formed by the prefabricated middle longitudinal beams 15, the prefabricated middle plates 16 arranged between the steel structure clamping grooves 2 and the prefabricated middle longitudinal beams 15, the prefabricated middle plates 16 arranged between every two adjacent prefabricated middle longitudinal beams 15 and the middle plate cast-in-place layers 20 on the middle plates.
The prefabricated cushion layer 23, the bottom plate waterproof layer 24 and the cast-in-place bottom plate 25 which are sequentially arranged on the substrate from bottom to top form a composite waterproof bottom plate together.
The underground wall 1 and the side wall waterproof layer and the side wall cast-in-place layer which are sequentially arranged on the underground wall towards the inner side direction form a composite waterproof wall together.
As shown in fig. 1, a prefabricated pipe support 10 is hung on the prefabricated top plate 9 through an embedded groove to form an integral prefabricated member. The prefabricated middle plate 16 is suspended with a prefabricated pipeline bracket 10 and a prefabricated rail top air duct 28 through an embedded groove, and is provided with a prefabricated pipeline sleeve 18 in a vertical through mode to form an integral prefabricated part. Grooves are reserved on the inner side of the crown beam 5, protruding tongues and grooves are reserved on two sides of the prefabricated top longitudinal beam 8, protruding tongues and grooves are reserved on two sides of the prefabricated middle longitudinal beam 15, and therefore the prefabricated top plate 9 and the prefabricated middle plate 16 can be conveniently hoisted and placed.
The composite waterproof prestressed top plate, the composite prestressed middle plate, the composite waterproof bottom plate and the composite waterproof wall are effectively connected to form a fully-wrapped waterproof fully-composite assembled underground structure, so that the problem of water leakage of the fully-assembled underground structure is solved, the limitation of the application range of the assembled underground structure is broken through, the composite waterproof prestressed underground structure can be applied to water-rich strata, areas with complex surrounding environment and high deformation control, and the composite waterproof prestressed top plate, the composite prestressed middle plate, the composite waterproof bottom plate and the composite waterproof wall can be powerfully pushed to be widely applied to underground engineering. The utility model replaces a large number of inner supports and templates of the conventional open cut cast-in-place structure, thereby saving investment; meanwhile, the prefabricated part can be pre-stressed, deformation of the assembled gap is balanced and offset, the surrounding environment can be effectively protected, and the safety of the foundation pit is ensured. The prefabricated part is manufactured in a factory and constructed mechanically, high quality and superior quality of underground structural engineering are achieved, traditional ceiling decoration is replaced, comprehensive pipeline standardization and mechanical installation are achieved through the pre-buried channel, investment and construction period are saved, green construction is achieved, energy is saved, environment is protected, the technology is advanced, sustainable development and green construction are achieved, practicability is high, and the underground structural engineering system has wide application space in the field of underground engineering.
As shown in fig. 1-6, the reverse construction method of the composite fabricated underground structure of the present invention comprises the following steps (steps S1-S4 shown in fig. 2, S5-S8 shown in fig. 3, S9-S11 shown in fig. 4, S12 completed shown in fig. 5, and the flow diagram shown in fig. 6):
s1, constructing an underground wall 1 and a main structure upright post, wherein a steel structure clamping groove 2 for mounting a prefabricated middle plate is pre-buried on the underground wall 1; in the step S1, the underground wall 1 adopts an underwater concrete casting underground diaphragm wall or a prefabricated underground wall; the construction method of the main structure column comprises the steps of constructing the pile foundation 3, hoisting the steel column 4 to be inserted into the pile foundation 3, and forming the steel pipe concrete composite column by the steel column 4 through a steel pipe concrete column, section steel concrete or outer concrete.
And S2, constructing the crown beam 5 and the retaining wall 6.
And S3, excavating to the lower excavation aspect 7 of the top plate beam, and hoisting the prefabricated top longitudinal beam 8 and the prefabricated top plate 9, wherein the prefabricated pipe support 10 is pre-embedded in the factory manufacturing process of the prefabricated top plate. Preferably, a groove is reserved during construction of the crown beam 5, and a protruding tongue-and-groove is reserved for the prefabricated top longitudinal beam 8 to be used for hoisting and placing the prefabricated top plate 9.
And S4, firstly applying prestress to the prefabricated roof 9 through a roof prestress jack 11 between the crown beam 5 and the prefabricated roof 9, then pouring a roof cast-in-situ layer 12, and constructing a roof flexible waterproof layer 13, wherein a plurality of soil discharging and feeding holes are longitudinally formed along the roof according to the soil discharging and feeding requirements.
And S5, synchronously excavating earth downwards to the lower excavation aspect 14 of the middle plate girder at the lower layer under the support of the precast beam slab system. Preferably, between S4-S5, after the roof precast beam slab system, the cast-in-place layer and the waterproof layer are completed, the pipeline can be moved back, backfilled and covered with soil, the traffic is recovered, and the influence on urban traffic and pipelines can be reduced.
And S6, hoisting the prefabricated middle longitudinal beam 15 and the prefabricated middle plate 16 by utilizing the upper layer unearthing and feeding holes, wherein the prefabricated middle plate is provided with a suspension mounting groove 29 in which a prefabricated pipeline bracket 17, a pre-buried pipeline sleeve 18 and a prefabricated rail top air duct 28 are pre-buried in an industrial manufacturing process. The underground wall 1 is pre-buried steel structure draw-in groove 2 in the medium plate elevation position, and prefabricated medium longitudinal beam 15 reserves protruding tongue-and-groove for the hoist and mount of prefabricated medium plate 16 are laid. During hoisting, the prefabricated middle longitudinal beam is inserted into a reserved steel structure clamping groove 2 of the underground continuous wall 1 and placed on a reserved middle longitudinal beam rabbet of the prefabricated middle longitudinal beam 15.
And S7, firstly, applying prestress to the prefabricated middle plate 16 by using the middle plate prestress jack 19 in the steel structure clamping groove 2, and then pouring a middle plate cast-in-place layer 20, wherein the unearthing and feeding holes of the middle plate correspond to the upper layer.
S8, synchronously excavating downwards under the support of the precast beam plate; and simultaneously constructing an underground layer of side wall waterproof layer 21 and an underground layer of side wall cast-in-place layer 22.
And S9, circulating downwards S5-S7, and excavating to the bottom of the foundation pit.
S10, installing a cushion layer 23, constructing a bottom plate waterproof layer 24 and casting a bottom plate 25 in situ.
S11, constructing a bottom plate layer side wall waterproof layer 26 and a bottom plate layer side wall cast-in-place layer 27; and synchronously and sequentially filling the soil discharging holes and the feeding holes.
Preferably, after S11, the method further comprises:
and S12, after the composite assembly type underground structure main body is finished and shield construction in the influence range of adjacent regions is finished, installing the prefabricated rail top air duct 28 through the suspension installation groove 29 pre-embedded in the prefabricated middle plate.
The utility model discloses a waterproof full compound assembled underground structure of full package and construction method need not to erect support and template in the whole work progress, but synchronous construction operation under the board upper plate, and the time of waiting for the age to form shortens greatly, has a series of advantages such as green construction, quick convenient, safe high efficiency, environmental protection and energy saving, sparingly invest in, has wide application space.
The top plate, the middle plate prefabricated part and the cast-in-place layer replace an inner support and a template, the earth is excavated, fed, the prefabricated middle plate is hoisted and the assembling machine enters and exits by utilizing the arranged earth-excavating feed hole in the construction process from top to bottom, and the main structure is finished after the bottom plate is closed and the side wall is finished.
The structure cast-in-place layer comprises a top plate cast-in-place layer, a middle plate cast-in-place layer and a cast-in-place bottom plate, and the prefabricated components are used as templates during pouring, so that a large number of templates can be saved.
The construction method of the fully-composite assembly type underground structure is used for constructing from top to bottom, and the top plate prefabricated part, the cast-in-place layer, the middle plate prefabricated part and the cast-in-place layer are used for replacing an inner support system, so that the construction objects around the foundation pit can be effectively protected, and a large amount of engineering investment is saved.
The construction method of the fully-composite assembly type underground structure is used for constructing from top to bottom, and the top plate prefabricated part, the cast-in-place layer, the middle plate prefabricated part and the cast-in-place layer are used for replacing an inner support system, so that the construction objects around the foundation pit can be effectively protected, and a large amount of engineering investment is saved. Considering that certain errors need to be reserved for installation and positioning of the prefabricated parts, transverse prestress is respectively applied to the prefabricated parts of the top plate and the middle plate through the top plate prestress jack and the middle plate prestress jack to balance and offset the reserved errors, deformation of the underground wall is controlled, and safety and stability of the foundation pit and the surrounding structures are ensured. Each prefabricated plate is tensioned and locked into a whole in the longitudinal direction (in-paper direction) by adopting prestressed reinforcements or locking steel rods section by section.
Splicing and assembling all prefabricated components of the structure, wherein the assembled components are formed by connecting mortises and high-strength bolts; the prefabricated cushion layer can also adopt a cast-in-place concrete structure.
The utility model discloses a compound assembled underground structure and construction method thereof is applicable to underground one deck, two-layer and more layers, can be applicable to no post list and stride, single post is two strides, two post three strides or more stride multilayer underground structure as required by the engineering.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. A compound assembled underground structure which characterized in that:
comprises an underground wall (1) and a main structure upright post; the top of the underground wall is provided with a crown beam (5), and the middle part of the underground wall is pre-embedded with a steel structure clamping groove (2) for mounting a prefabricated middle plate; the top of the main structure upright post is provided with a prefabricated top longitudinal beam (8), and the middle part of the main structure upright post is provided with a prefabricated middle longitudinal beam (15); a top plate prestress jack (11) is arranged between the crown beam (5) and the prefabricated top plate (9), and a middle plate prestress jack (19) is arranged between the steel structure clamping groove (2) and the prefabricated middle plate (16);
a composite waterproof prestressed top plate is formed by the prefabricated top longitudinal beams (8), a prefabricated top plate (9) arranged between the top beam (5) and the prefabricated top longitudinal beams (8), a prefabricated top plate (9) arranged between two adjacent prefabricated top longitudinal beams (8), a top plate cast-in-place layer (12) on the top plate and a top plate flexible waterproof layer (13) on the top plate cast-in-place layer;
a composite prestress middle plate is formed by the prefabricated middle longitudinal beams (15), a prefabricated middle plate (16) arranged between the steel structure clamping groove (2) and the prefabricated middle longitudinal beams (15), a prefabricated middle plate (16) arranged between two adjacent prefabricated middle longitudinal beams (15) and a middle plate cast-in-place layer (20) on the middle plate;
the prefabricated cushion layer (23), the bottom plate waterproof layer (24) and the cast-in-place bottom plate (25) which are sequentially arranged on the substrate from bottom to top form a composite waterproof bottom plate together;
the underground wall (1) and the side wall waterproof layer and the side wall cast-in-place layer which are sequentially arranged on the underground wall towards the inner side direction form a composite waterproof wall together;
the composite waterproof prestressed top plate, the composite prestressed middle plate, the composite waterproof bottom plate and the composite waterproof wall are all effectively connected to form a fully-enclosed waterproof fully-composite assembled underground structure.
2. A composite fabricated underground structure as defined in claim 1 in which:
the prefabricated top plate (9) is hung with a prefabricated pipeline bracket (10) through the embedded groove to form an integral prefabricated member.
3. A composite fabricated underground structure as defined in claim 1 in which:
the prefabricated middle plate (16) is suspended with a prefabricated pipeline bracket (10) and a prefabricated rail top air duct (28) through an embedded groove, and is provided with a prefabricated pipeline sleeve (18) in a vertically through mode to form an integral prefabricated part.
4. A composite fabricated underground structure as defined in claim 1 in which:
the main structure column comprises a pile foundation (3) and a steel column (4), wherein the steel column (4) is inserted into the pile foundation (3), and the steel column (4) forms a steel pipe concrete composite column by adopting a steel pipe concrete column, section steel concrete or outer concrete.
5. A composite fabricated underground structure as defined in claim 1 in which:
grooves are reserved on the inner sides of the crown beams (5), protruding tongues and grooves are reserved on the two sides of the prefabricated top longitudinal beam (8), and protruding tongues and grooves are reserved on the two sides of the prefabricated middle longitudinal beam (15).
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110004981A (en) * | 2019-04-29 | 2019-07-12 | 中铁第四勘察设计院集团有限公司 | A kind of combined assembled underground structure and reversed construction method |
| CN111794246A (en) * | 2020-07-21 | 2020-10-20 | 安徽省交通建设股份有限公司 | Excavation supporting system for foundation pit of upper-penetrating subway tunnel and construction method |
| CN112921986A (en) * | 2021-03-26 | 2021-06-08 | 北京建筑大学 | Assembled underground structure and integrated construction method of assembled underground structure and foundation pit |
| CN113047863A (en) * | 2021-04-06 | 2021-06-29 | 深圳市市政设计研究院有限公司 | Mechanized underground excavation assembly type subway station and construction method thereof |
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2019
- 2019-04-29 CN CN201920607857.8U patent/CN210086295U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110004981A (en) * | 2019-04-29 | 2019-07-12 | 中铁第四勘察设计院集团有限公司 | A kind of combined assembled underground structure and reversed construction method |
| CN111794246A (en) * | 2020-07-21 | 2020-10-20 | 安徽省交通建设股份有限公司 | Excavation supporting system for foundation pit of upper-penetrating subway tunnel and construction method |
| CN112921986A (en) * | 2021-03-26 | 2021-06-08 | 北京建筑大学 | Assembled underground structure and integrated construction method of assembled underground structure and foundation pit |
| CN113047863A (en) * | 2021-04-06 | 2021-06-29 | 深圳市市政设计研究院有限公司 | Mechanized underground excavation assembly type subway station and construction method thereof |
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