Open-cut track transportation station engineering prefabricated assembly structure and construction method

Abstract

The application discloses a kind of open cut method rail transit station engineering prefabricated assembly structure and construction method, bottom, top plate prefabricated piece both ends are connected with side wall prefabricated piece, the both ends of bottom, top plate prefabricated piece are respectively provided with first mortise joint, the both ends of side wall prefabricated piece are respectively provided with second mortise joint, first mortise joint and second mortise joint are inserted into prestressed post-tensioning method prestressed cable (reinforcing bar) and are formed prestressed concave-convex mortise grouting joint structure.Effect: using whole column-free type, release rail transit station engineering building space, equipment room arrangement is flexible, passenger space experience is superior;Bottom, top plate prefabricated piece uses longitudinal cavity structure, can lay municipal pipeline and other equipment pipeline, also can be used as ventilation air conditioning air pipe, reduce equipment pipeline to underground space occupation, cavity meets daily later operation and maintenance requirement;Meet the stiffness of assembly joint and force transmission requirement;Middle plate prefabricated piece is prefabricated whole assembly type, rail top air duct prefabricated piece is slot type assembly connection.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building construction, in particular to a kind of open cut method rail transit station engineering prefabricated assembly structure, and also relates to a kind of open cut method rail transit station engineering prefabricated assembly structure construction method. BACKGROUND

[0002] Open cut method refers to underground structure engineering construction, from ground to layer, section by section excavation, until the structure required size and elevation, then in foundation pit main structure construction and waterproof operation, finally backfill restores ground.

[0003] The prior art rail transit station engineering needs to first support structure construction, then foundation pit excavation, then erect support or make soil nail or anchor cable to support, ensure foundation pit stability, finally again layering cast-in-place underground structure construction waterproof layer, due to many processes, often need to change support, sectional reserved construction joint, etc., construction quality is difficult to guarantee, often appear concrete pouring does not meet durability requirements and serious leakage, not only large engineering investment, there is a lot of dust, mud and other environmental impact during construction. At the same time, the existing assembly station also needs to first excavate foundation pit, then anchor cable, finally assemble station, due to many times urban center city does not have the condition of anchor cable, thus the application range is greatly limited.

[0004] There is a lack of an open cut method rail transit station engineering prefabricated assembly structure and construction method using prefabrication method instead of cast-in-place method. SUMMARY

[0005] Therefore, the present application provides an open cut method rail transit station engineering prefabricated assembly structure to solve the above problems in the prior art.

[0006] In order to achieve the above purpose, the present application provides the following technical scheme:

[0007] According to the first aspect of the present application, an open cut method rail transit station engineering prefabricated assembly structure, comprising a bottom plate prefabricated part, a top plate prefabricated part and a side wall prefabricated part, the bottom plate prefabricated part is arranged below the top plate prefabricated part, the two ends of the bottom plate prefabricated part and the top plate prefabricated part are connected by the side wall prefabricated part, the two ends of the bottom plate prefabricated part and the top plate prefabricated part are respectively provided with a first tenon joint, the two ends of the side wall prefabricated part are respectively provided with a second tenon joint, the first tenon joint and the second tenon joint are inserted and matched to form a prestressed concave-convex tenon grouting joint structure with prestressed post-tensioning method prestressed cable.

[0008] Further, prestressed cables are further included, and the end of the bottom plate prefabricated part, the end of the top plate prefabricated part and the end of the side wall prefabricated part are fixed on the prestressed tongue and groove joint.

[0009] Further, a middle plate prefabricated part is further included, and the inner side of each of the two side wall prefabricated parts is provided with a bracket with a first clamping groove, and the two ends of the middle plate prefabricated part are respectively overlapped on the two brackets with the first clamping groove.

[0010] Further, a rail top air duct prefabricated part is further included, the lower surface of the middle plate prefabricated part is further provided with a second clamping groove, the rail top air duct prefabricated part is inserted and clamped between the bracket with the first clamping groove and the second clamping groove in segments in the longitudinal direction, the slotted joint is sealed by sealing glue or cement-based crystalline material, and the rail top air duct prefabricated part is a hollow structure.

[0011] Further, a plurality of first cavities extending in the longitudinal direction are formed in the bottom plate prefabricated part, and the plurality of first cavities are distributed at equal intervals.

[0012] Further, a plurality of second cavities extending in the longitudinal direction are formed in the top plate prefabricated part, and the plurality of second cavities are distributed at equal intervals.

[0013] Further, a plurality of third cavities extending in the longitudinal direction are formed in the middle plate prefabricated part, and the plurality of third cavities are distributed at equal intervals.

[0014] Further, a support column is further included, the upper end of the support column abuts against the middle part of the lower surface of the middle plate prefabricated part, and the lower end of the support column is detachably connected to the middle part of the upper surface of the bottom plate prefabricated part.

[0015] Further, the cross section of the first cavity, the second cavity and the third cavity is polygonal, circular or elliptical.

[0016] Further, a first tension hole and a second tension hole are further included, a plurality of the first tension holes are formed on the bottom plate prefabricated part and the top plate prefabricated part, and a plurality of the second tension holes are formed on the prestressed cable.

[0017] According to a first aspect of the present application, a construction method of a precast assembly type structure of a cut-and-cover rail transit station project is used to construct a precast assembly type structure of a cut-and-cover rail transit station project as any one of the first aspect of the present application, and specifically includes the following steps:

[0018] Step S100, precast the required assembly type structure components in a factory or on site, specifically including a bottom plate prefabricated part, a middle plate prefabricated part, a side wall prefabricated part, a prestressed cable, a top plate prefabricated part and a rail top air duct prefabricated part;

[0019] Step S200, performing open cut method foundation pit engineering construction;

[0020] Step S300, sequentially assembling the bottom plate prefabricated part, the side wall prefabricated part, the middle plate prefabricated part, the prestressed cable, the top plate prefabricated part and the rail top air duct prefabricated part until the overall structure is completed.

[0021] Step S400, removing the related construction facilities and performing soil covering and backfilling.

[0022] The application has the following advantages: the open cut method rail transit station engineering prefabricated assembly structure and the construction method can release the building space of the rail transit station engineering to the maximum, and the equipment room is arranged more flexibly, and the passenger space experience is more superior; the bottom plate prefabricated part and the top plate prefabricated part adopt the longitudinal cavity structure, municipal pipelines, other related internal equipment pipelines or air pipes for ventilation and air conditioning can be laid in the cavity, the occupation of the underground space by various equipment pipelines is reduced to the maximum, and the cavity size meets the daily post-operation and maintenance requirements; the joint type of the bottom plate prefabricated part, the top plate prefabricated part and the side wall prefabricated part adopts the prestressed concave-convex tenon grouting joint, the stiffness and force transmission requirements of the assembly joint are met, the construction is facilitated, and the durability is reliable; the middle plate prefabricated part adopts the prefabricated integral assembly type, and the rail top air duct prefabricated part adopts the clamping groove type assembly connection, which is safe and reliable, facilitates the construction, and realizes the green construction technology of the open cut method rail transit station engineering. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be obtained from the provided drawings without creative labor.

[0024] The structures, proportions, sizes, etc. shown in the specification are only used to cooperate with the content disclosed in the specification, to be understood and read by those skilled in the art, and do not define the limiting conditions for the implementation of the present application, so they do not have technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0025] Figure 1 A structural diagram of an open cut method rail transit station engineering prefabricated assembly structure is provided for some embodiments of the present application.

[0026] Figure 2A structural diagram of a prefabricated and assembled structure for an open-cut rail transit station project provided in some embodiments of the present invention.

[0027] Figure 3 A cross-sectional hoisting structure diagram of a prefabricated assembled structure for an open-cut rail transit station project provided in some embodiments of the present invention.

[0028] Figure 4 A flowchart of a construction method for a prefabricated and assembled structure of a rail transit station project using the open-cut method is provided in some embodiments of the present invention.

[0029] In the figure: 1. Bottom plate prefabricated part, 2. Middle plate prefabricated part, 3. Side wall prefabricated part, 4. Prestressed cable, 5. Top plate prefabricated part, 6. Rail top air duct prefabricated part, 7. Corbel with first slot, 8. Second slot, 9. First cavity, 10. Second cavity, 11. First mortise and tenon joint, 12. Second mortise and tenon joint, 13. Guarding pile, 14. Third cavity, 15. Support column, 16. First tensioning hole, 17. Second tensioning hole, 18. Hoisting system, 19. Pre-buried grouting pipe. DETAILED DESCRIPTION

[0030] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. It is apparent that the described embodiments are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0031] Example 1

[0032] like Figure 1 As shown, in this embodiment, a prefabricated and assembled structure of an open-cut rail transit station project includes a bottom plate prefabricated part 1, a top plate prefabricated part 5 and a side wall prefabricated part 3. The bottom plate prefabricated part 1 is arranged at intervals directly below the top plate prefabricated part 5. The two ends of the bottom plate prefabricated part 1 and the top plate prefabricated part 5 are respectively connected by the side wall prefabricated part 3. The two ends of the bottom plate prefabricated part 1 and the top plate prefabricated part 5 are respectively provided with a first mortise and tenon joint 11, and the two ends of the side wall prefabricated part 3 are respectively provided with a second mortise and tenon joint 12. The first mortise and tenon joint 11 and the second mortise and tenon joint 12 are plugged into and matched with the prestressed post-tensioned prestressed cable to form a prestressed concave-convex tenon grouting joint structure.

[0033] Specifically, the first tenon joint 11 is provided with a plurality of parallel long strip-shaped protrusions, the second tenon joint 12 is provided with long strip-shaped grooves corresponding to the long strip-shaped protrusions on the first tenon joint 11, the long strip-shaped protrusions are embedded in the long strip-shaped grooves, thereby forming a concave-convex tenon grouting joint structure, in addition, the connection between the long strip-shaped protrusions and the long strip-shaped grooves on the first tenon joint 11 is a circular arc transition, and the connection between the long strip-shaped protrusions and the long strip-shaped grooves on the second tenon joint 12 is also a circular arc transition, thereby reducing stress concentration.

[0034] The technical effects achieved by the embodiment are as follows: the open cut method rail transit station engineering prefabricated assembly structure of the embodiment adopts an overall column-free type, maximally releases the building space of the rail transit station engineering, and meanwhile, the equipment room is arranged more flexibly, and the passenger space experience is more superior; the bottom plate prefabricated part and the top plate prefabricated part both adopt a longitudinal cavity structure, municipal pipelines, other related internal equipment pipelines or air pipes for ventilation and air conditioning can be laid in the cavity, thereby maximally reducing the occupation of the underground space by various equipment pipelines, and meanwhile, the cavity size meets the daily later operation and maintenance requirements; the joint type of the bottom plate prefabricated part, the top plate prefabricated part and the side wall prefabricated part adopts a prestressed concave-convex tenon grouting joint, which meets the rigidity and force transmission requirements of the assembly joint, is convenient for construction, and is durable and reliable; the middle plate prefabricated part adopts a prefabricated integral assembly type, and the rail top air duct prefabricated part adopts a clamping groove type assembly connection, which is safe and reliable, convenient for construction, and realizes the green construction technology of the open cut method rail transit station engineering.

[0035] Embodiment 2

[0036] As shown in Figure 1 and Figure 3 , the open cut method rail transit station engineering prefabricated assembly structure in the embodiment includes all the technical features in the embodiment 1, in addition, it further includes a prestressed cable 4 (reinforcing steel bar), the end of the bottom plate prefabricated part 1, the end of the top plate prefabricated part 5 and the end of the side wall prefabricated part 3 are fixed on the prestressed concave-convex tenon grouting joint, specifically, a tension hole is formed on the prestressed cable 4 (reinforcing steel bar), and correspondingly, a hole matched with the tension hole is formed on the end of the bottom plate prefabricated part 1, the end of the top plate prefabricated part 5 and the end of the side wall prefabricated part 3.

[0037] Optionally, it further includes a middle plate prefabricated part 2, the inner side surfaces of the two side wall prefabricated parts 3 are both provided with corbels 7 with first clamping grooves, the two ends of the middle plate prefabricated part 2 are respectively overlapped on the two corbels 7 with the first clamping grooves, and through the arrangement of the middle plate prefabricated part 2, the strength of the overall open cut method rail transit station engineering prefabricated assembly structure is enhanced.

[0038] Optionally, a rail top air duct prefabricated part 6 is also included, and a second slot 8 is also provided on the lower surface of the middle plate prefabricated part 2. The rail top air duct prefabricated part 6 is inserted longitudinally in sections and clamped between the corbel 7 with the first slot and the second slot 8. The slotted joints are sealed with sealant or cement-based crystalline materials. The rail top air duct prefabricated part 6 is a hollow structure. By setting the rail top air duct prefabricated part 6, the ventilation requirements are achieved. The two vertical side surfaces of the rail top air duct prefabricated part 6 are respectively provided with clamping protrusions that are compatible with the corbel 7 with the first slot and the second slot 8.

[0039] Example 3

[0040] like Figure 1 As shown, a prefabricated and assembled structure for an open-cut rail transit station project in this embodiment includes all the technical features of Example 2. In addition, a plurality of longitudinally extending first cavities 9 are opened in the base plate prefabricated part 1, and the plurality of first cavities 9 are evenly spaced.

[0041] Optionally, a plurality of longitudinally extending second cavities 10 are defined in the top plate prefabricated component 5 , and the plurality of second cavities 10 are distributed at equal intervals.

[0042] The beneficial effects of this embodiment are as follows: by providing the first cavity 9 in the bottom plate prefabricated part 1 and the second cavity 10 in the top plate prefabricated part 5, the laying of equipment pipelines is achieved, the damage caused by the exposure of equipment pipelines is reduced, and it can also provide maintenance personnel with maintenance and repair of the prefabricated assembled structure of the overall open-cut rail transit station project. In addition, the first cavity 9 and the second cavity 10 can also play a ventilation role.

[0043] Example 4

[0044] like Figure 2 As shown, a prefabricated and assembled structure for an open-cut rail transit station project in this embodiment includes all the technical features of Example 3. In addition, a plurality of longitudinally extending third cavities 14 are opened in the middle plate prefabricated part 2, and the plurality of third cavities 14 are evenly spaced. By providing the third cavities 14, the laying of equipment pipelines is facilitated and ventilation is also facilitated. In addition, the weight of the middle plate prefabricated part 2 can be significantly reduced, and the middle part of the middle plate prefabricated part 2 can be prevented from being compressed and bent.

[0045] Optionally, it also includes a support column 15, the upper end of the support column 15 abuts against the middle of the lower surface of the middle plate preform 2, and the lower end of the support column 15 is detachably connected to the middle of the upper surface of the bottom plate preform 1. When the middle plate preform 2 is long, at least one support column 15 can be set for support.

[0046] Optionally, the cross-sections of the first cavity 9 , the second cavity 10 and the third cavity 14 are polygonal, circular or elliptical. In addition, the cross-sections of the first cavity 9 , the second cavity 10 and the third cavity 14 are not limited to the above shapes.

[0047] Optionally, it further includes first tensioning holes 16 and second tensioning holes 17 , a plurality of first tensioning holes 16 are opened on the bottom plate prefabricated component 1 and the top plate prefabricated component 2 , and a plurality of second tensioning holes 17 are opened on the prestressed cable 4 .

[0048] Example 5

[0049] like Figure 1 As shown, a prefabricated and assembled structure for an open-cut rail transit station project in this embodiment includes all the technical features in Example 4. In addition, it also includes pre-buried grouting pipes 19. Pre-buried grouting pipes 19 are provided on the inner sides of the top plate prefabricated part 5 and the side wall prefabricated part 3.

[0050] Example 6

[0051] like Figure 4 As shown, a construction method for a prefabricated and assembled structure for an open-cut rail transit station project in this embodiment is used to construct a prefabricated and assembled structure for an open-cut rail transit station project as described in any one of Examples 1 to 5, and specifically includes the following steps:

[0052] Step S100: Prefabricate the required assembled structural components in a factory or on site, specifically including a bottom plate prefabricated component, a middle plate prefabricated component, a side wall prefabricated component, prestressed cables (rebars), a top plate prefabricated component, and a rail-top air duct prefabricated component;

[0053] Step S200: performing open-cut foundation pit construction;

[0054] Step S300: sequentially assemble the bottom plate prefabricated parts, the side wall prefabricated parts, the middle plate prefabricated parts, the prestressed cables (rebars), the top plate prefabricated parts, and the rail top air duct prefabricated parts until the overall structure is assembled;

[0055] Step S400: dismantle relevant construction facilities and perform backfilling.

[0056] During the construction process, the hoisting system 18 is used to hoist each prefabricated component, and retaining piles 13 are provided on the outside of the side wall prefabricated component 3 .

[0057] The beneficial effect in the embodiment is that: through the construction method of the open cut method track traffic station engineering prefabricated assembly structure, the whole column-free type is adopted, the building space of the track traffic station engineering is released to the maximum, meanwhile, the equipment room is arranged more flexibly, and the passenger space experience is more superior; the bottom plate prefabricated part and the top plate prefabricated part adopt longitudinal cavity structures, municipal pipelines, other related internal equipment pipelines or air pipes of ventilation and air conditioning can be laid in the cavities, the occupation of the underground space by various equipment pipelines is reduced to the maximum, meanwhile, the cavity size meets the daily later operation and maintenance requirements; the joint type of the bottom plate prefabricated part, the top plate prefabricated part and the side wall prefabricated part adopts a prestressed concave-convex tenon grouting joint, the stiffness and force transmission requirements of the assembly joint are met, the construction is convenient, and the durability is reliable; the middle plate prefabricated part adopts a prefabricated integral assembly type, and the track top air duct prefabricated part adopts a clamping groove type assembly connection, which is safe and reliable, convenient for construction, and realizes the green construction technology of the open cut method track traffic station engineering.

[0058] Although the present application has been described in detail with general description and specific embodiments above, some modifications or improvements can be made on the basis of the present application, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not deviating from the spirit of the present application, are within the scope of the present application.

[0059] The terms such as "upper", "lower", "left", "right", "middle" and the like cited in the specification are only for the convenience of clear description, and are not used to limit the scope of the present application. The change or adjustment of the relative relationship without substantial change of the technical content is also regarded as the implementation scope of the present application.

Claims

1. A prefabricated assembly type structure for open cut rail transit station engineering, characterized in that, The application relates to a prefabricated assembly structure for a whole open-cut rail transit station engineering, which comprises a bottom plate prefabricated part (1), a middle plate prefabricated part (2), a top plate prefabricated part (5), a rail top air duct prefabricated part (6) and side wall prefabricated parts (3), the bottom plate prefabricated parts (1) are arranged in pairs below the top plate prefabricated part (5), the two ends of the bottom plate prefabricated part (1) and the top plate prefabricated part (5) are connected by the side wall prefabricated parts (3) respectively, the two ends of the bottom plate prefabricated part (1) and the top plate prefabricated part (5) are respectively provided with first tenon joints (11), the two ends of the side wall prefabricated part (3) are respectively provided with second tenon joints (12), the first tenon joint (11) and the second tenon joint (12) are inserted and matched with prestressed cables to form a prestressed concave-convex tenon grouting joint structure. The first tenon joint (11) is provided with a plurality of parallel strip-shaped protrusions, the second tenon joint (12) is provided with strip-shaped grooves corresponding to the strip-shaped protrusions of the first tenon joint (11), the strip-shaped protrusions are embedded in the strip-shaped grooves, and thus a concave-convex tenon grouting joint structure is formed; the connecting positions of the strip-shaped protrusions and the strip-shaped grooves on the first tenon joint (11) are all circular arc transitions, the connecting positions of the strip-shaped protrusions and the strip-shaped grooves on the second tenon joint (12) are all circular arc transitions, and thus stress concentration is reduced; the inner sides of the two side wall prefabricated parts (3) are provided with corbels (7) with first clamping grooves, the two ends of the middle plate prefabricated part (2) are respectively overlapped on the two corbels (7) with the first clamping grooves; the lower surface of the middle plate prefabricated part (2) is further provided with second clamping grooves (8), the rail top air duct prefabricated part (6) is inserted and clamped between the corbel (7) with the first clamping groove and the second clamping groove (8) in sections and longitudinally, the slotted joint is sealed by sealing glue or cement-based crystalline material, and the rail top air duct prefabricated part (6) is a hollow structure. The bottom plate prefabricated part (1) is provided with a plurality of longitudinally-extended first cavities (9) which are equally spaced, the top plate prefabricated part (5) is provided with a plurality of longitudinally-extended second cavities (10) which are equally spaced, the first cavities (9) arranged in the bottom plate prefabricated part (1) and the second cavities (10) arranged in the top plate prefabricated part (5) are used for laying equipment pipelines, reducing damage caused by exposed equipment pipelines, providing maintenance and repair for maintenance and repair personnel, and simultaneously playing a ventilation role; the middle plate prefabricated part (2) is provided with a plurality of longitudinally-extended third cavities (14) which are equally spaced, the third cavities (14) are used for facilitating the laying of equipment pipelines, assisting ventilation, reducing the weight of the middle plate prefabricated part (2) and avoiding the middle part of the middle plate prefabricated part (2) from being bent under pressure. Further comprising a support column (15), the upper end of the support column (15) is abutted in the middle of the lower surface of the middle plate prefabricated part (2), the lower end of the support column (15) is detachably connected in the middle of the upper surface of the bottom plate prefabricated part (1).

2. The open cut rail transit station engineering prefabricated assembly structure according to claim 1, characterized in that, Further comprising a prestressed cable (4), the end of the bottom plate prefabricated part (1), the end of the top plate prefabricated part (5) and the end of the side wall prefabricated part (3) are fixed on the prestressed tongue and groove joint.

3. The open cut rail transit station engineering prefabricated assembly structure according to claim 1, characterized in that, Further comprising a first tension hole (16) and a second tension hole (17), a plurality of first tension holes (16) are opened on the bottom plate prefabricated part (1) and the top plate prefabricated part (2), a plurality of second tension holes (17) are opened on the prestressed cable (4).

4. A construction method of a precast fabricated structure of an open-cut rail transit station project, characterized in that, The application discloses a kind of open cut method rail transit station engineering prefabricated assembly structure for construction formation as claimed in any one of claims 1 to 3, specifically comprising the following steps: Step S100, the components of the assembly structure required are prefabricated in factory or on site, specifically including bottom plate prefabricated part, middle plate prefabricated part, side wall prefabricated part, prestressed cable, top plate prefabricated part and rail top air duct prefabricated part; Step S200, open cut method foundation pit engineering construction is carried out; Step S300, bottom plate prefabricated part, side wall prefabricated part, middle plate prefabricated part, prestressed cable, top plate prefabricated part and rail top air duct prefabricated part are sequentially assembled, until the whole structure is assembled; Step S400, relevant construction facilities are removed, and earth covering backfilling is carried out.

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