Round working well main body structure

Abstract

The utility model discloses a circular working well main body structure which comprises a cylindrical hollow side wall, a top plate located at the top is arranged at the upper end of the side wall, a bottom plate located at the bottom is arranged at the lower end of the side wall, #-shaped crossed internal partition walls are arranged in the internal space of the side wall, and the internal partition walls divide the internal space. And four shield launching and receiving holes are reserved in the lining wall on the inner side of the side wall. According to the utility model, the inverted circular lining wall and the enclosure structure form a superposed side wall, the support rigidity of an internal #-shaped crossed longitudinal and transverse beam (wall) system is large, and structural members are permanently and temporarily combined, so that the stability of the multi-hole structure of the ultra-deep circular working well is enhanced, and the formation deformation is effectively controlled. The longitudinal and transverse beam (wall) system is reasonable in space layout, plate span is reduced, a self-balancing space stress system is formed, the thickness of the top plate and the thickness of the bottom plate are small under the condition of large burial depth, the plate face is flat, arching is not needed, construction is convenient, and space utilization is reasonable.

Description

Technical Field

[0001] This utility model belongs to the field of underground engineering structures, specifically relating to a main structure of a circular working well. Background Technology

[0002] When constructing long-distance tunnels for intercity railways in urban areas, it is necessary to set up working shafts for segmented construction to accelerate the construction progress. To avoid the dense existing subway network, intercity railway tunnels are generally quite deep, resulting in a corresponding increase in the required working shaft depth. The existing rectangular working shaft "retaining structure + internal bracing" support system cannot effectively meet the design and construction requirements of ultra-deep working shafts. This leads to problems such as excessively large structural dimensions, low utilization rate of temporary internal supports, material waste, and construction inconvenience in areas such as shield launching, receiving, and equipment hoisting. While ultra-deep working shafts often adopt a near-circular retaining structure after optimization, circular working shafts have a large number of shield launching and receiving portals, a large structural opening area, and an irregular shape. High requirements for structural safety and stability are placed during construction, and the structural depth and stress requirements are high during service. Therefore, a circular working shaft main structure is urgently needed to solve these problems. Summary of the Invention

[0003] This utility model is proposed to solve the problems existing in the prior art, and its purpose is to provide a main structure for a circular working well.

[0004] The technical solution of this utility model is: a circular working well main structure, including a cylindrical hollow side wall, a top plate at the upper end of the side wall, a bottom plate at the lower end of the side wall, and a grid-shaped intersecting internal partition wall in the internal space of the side wall to divide the internal space. Four shield tunneling starting and receiving openings are reserved in the inner lining wall on the inner side of the side wall.

[0005] Furthermore, the top plate includes a top plate ring beam connected to the side wall, and the top plate ring beam is provided with a longitudinal top plate beam and a transverse top plate beam in the middle. The top plate ring beam, the top plate longitudinal beam, and the top plate transverse beam enclose each other to form a top plate hoisting hole.

[0006] Furthermore, after the shield tunneling machine is launched or received, a concealed crossbeam is installed in the top plate, and the concealed crossbeam is located at the lifting hole of the top plate.

[0007] Furthermore, the side wall includes an external enclosure structure and an internal lining wall, wherein the enclosure structure and the lining wall form a composite wall, and a shear groove for the composite wall is provided at the interface between the two.

[0008] Furthermore, the inner lining wall is provided with a spatially irregular precast ring beam, which is projected as a circle in the longitudinal direction of the tunnel, and the inner diameter of the projected circle is adapted to the diameter of the tunnel boring machine.

[0009] Further, the internal partition wall comprises a transverse cross partition wall connected with the roof transverse beam in alignment, a cross partition wall pre-cast ring beam is arranged in the cross partition wall, and the inner diameter of the cross partition wall pre-cast ring beam is adapted to the diameter of the shield machine.

[0010] Further, the internal partition wall comprises a longitudinal longitudinal partition wall connected with the roof longitudinal beam in alignment, and the longitudinal partition wall is in a disconnected state in the middle of the working well.

[0011] Further, after the shield launching or receiving is completed, the internal partition wall further comprises a use stage intermediate partition wall, and the use stage intermediate partition wall is perpendicular to the roof hidden transverse beam and the floor hidden transverse beam.

[0012] Further, the use stage intermediate partition wall hidden column is arranged on the floor hidden transverse beam, and the use stage intermediate partition wall hidden column is connected with the roof hidden transverse beam and the floor hidden transverse beam in alignment.

[0013] The beneficial effects of the utility model are as follows:

[0014] The utility model discloses a reverse construction circular lining wall and enclosure structure form the superimposed side wall, save construction period, utilize circular arch effect and superimposed structure system, optimize the enclosure structure and lining wall thickness, reduce the engineering material consumption.

[0015] The utility model discloses the internal well type intersection longitudinal beam (wall) system support rigidity is big, has strengthened the stability of the superdeep circular working well multi-hole structure, has effectively controlled stratum deformation. Longitudinal beam (wall) system spatial distribution is reasonable, has reduced the slab span, has formed the self-balanced space stress system, under the condition of big buried depth, the roof and floor thickness is smaller, and realizes the slab plane flatness and does not need to rise arch, and the construction technology and process are simple and controllable, and the space utilization is more reasonable.

[0016] The utility model discloses the cast-in-situ reverse construction method through self top to bottom layering excavation, layering construction, optimizes construction procedure, structural member permanent and temporary combination, has saved the demolition engineering quantity, green low carbon economy. ACCURACY OF DRAWINGS

[0017] Figure 1 It is the three-dimensional view of the main structure of the circular working well in the utility model;

[0018] Figure 2 It is the roof plan view (construction stage) of the main structure of the circular working well in the utility model;

[0019] Figure 3 It is the roof plan view (use stage) of the main structure of the circular working well in the utility model;

[0020] Figure 4is the downward sectional view of the circular working well main body structure 1 / 2 height (construction stage) in the utility model;

[0021] Figure 5 is the downward sectional view of the circular working well main body structure 1 / 2 height (use stage) in the utility model;

[0022] Figure 6 is Figure 4 the sectional view of 1-1 section in the utility model;

[0023] Figure 7 is Figure 5 the sectional view of 1-1 section in the utility model;

[0024] Figure 8 is Figure 4 the sectional view of 2-2 section in the utility model;

[0025] Figure 9 is Figure 5 the sectional view of 2-2 section in the utility model;

[0026] Figure 10 is Figure 5 the sectional view of 3-3 section in the utility model;

[0027] Figure 11 is the three-dimensional model diagram of the circular working well main body structure (construction stage);

[0028] Figure 12 is the three-dimensional model diagram of the circular working well main body structure (use stage);

[0029] Wherein:

[0030] 1 roof 2 side wall

[0031] 3 bottom plate 4 interior partition wall

[0032] 11 roof ring beam 12 roof longitudinal beam

[0033] 13 roof cross beam 14 roof hoisting hole

[0034] 15 roof hidden cross beam

[0035] 111 roof ring beam rebate 121 roof longitudinal beam rebate

[0036] 131 roof cross beam rebate

[0037] 21 enclosure structure 22 interior lining wall

[0038] 23 laminated wall shear groove

[0039] 221 interior lining wall first pouring ring beam 222 interior lining wall hidden ring beam

[0040] 31. Concealed crossbeams on the base plate

[0041] 41. Longitudinal partition wall; 42. Transverse partition wall

[0042] 43 Partition walls during the usage phase

[0043] 421. Cast the ring beam before the transverse diaphragm wall. 422. Cast the ring beam after the transverse diaphragm wall.

[0044] 431 Concealed columns in partition walls during the usage phase. Detailed Implementation

[0045] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0046] like Figures 1 to 12 As shown, a circular working shaft main structure includes a cylindrical hollow side wall 2, a top plate 1 at the top of the side wall 2, a bottom plate 3 at the bottom of the side wall 2, and a grid-shaped intersecting internal partition wall 4 in the internal space of the side wall 2 to divide the internal space. Four shield tunneling starting and receiving openings are reserved in the inner lining wall 22 on the inner side of the side wall 2.

[0047] The top plate 1 includes a top plate ring beam 11 connected to the side wall 2. The top plate ring beam 11 has a longitudinal top plate beam 12 and a transverse top plate beam 13 in the middle. The top plate ring beam 11, the top plate longitudinal beam 12, and the top plate transverse beam 13 enclose each other to form a top plate hoisting hole 14.

[0048] After the shield tunneling machine is launched or received, a hidden crossbeam 15 is provided in the top plate 1, and the hidden crossbeam 15 is located at the top plate hoisting hole 14.

[0049] The side wall 2 includes an outer enclosure structure 21 and an inner lining wall 22. The enclosure structure 21 and the inner lining wall 22 form a composite wall, and a composite wall shear groove 23 is provided at the interface between the two.

[0050] The inner lining wall 22 is provided with a spatially irregular precast ring beam 221. The projection of the precast ring beam 221 in the longitudinal direction of the tunnel is circular, and the inner diameter of the projected circle is adapted to the diameter of the tunnel boring machine.

[0051] The internal partition wall 4 includes a transverse partition wall 42, which is aligned and connected to the top plate beam 13. A pre-cast ring beam 421 is provided in the transverse partition wall 42, and the inner diameter of the pre-cast ring beam 421 is adapted to the diameter of the tunnel boring machine.

[0052] The internal partition wall 4 includes a longitudinal partition wall 41, which is aligned and connected to the longitudinal beam 12 of the top plate. The longitudinal partition wall 41 is disconnected in the middle of the working shaft, providing more convenient space for the construction of the left and right shield tunnels.

[0053] After the completion of the shield launching or receiving, the internal partition wall 4 further comprises a use stage partition wall 43 which is perpendicular to the top plate hidden cross beam 15 and the bottom plate hidden cross beam 31.

[0054] The use stage partition wall hidden column 431 is arranged on the bottom plate hidden cross beam 31 and is connected in position with the top plate hidden cross beam 15 and the bottom plate hidden cross beam 31.

[0055] Specifically, the top plate 1, the side wall 2, the bottom plate 3 and the internal partition wall 4 combine to form a cylindrical space composite frame structure.

[0056] As a preferred implementation, the outer diameter of the cylindrical working well main body structure is 36 m, which is suitable for the space requirement of launching and receiving of two 9.13 m diameter shield machines of an intercity railway double-track tunnel.

[0057] Specifically, the top plate ring beam 11, the top plate longitudinal beam 12 and the top plate cross beam 13 in the top plate 1 form a ring-in-well cross structure.

[0058] Specifically, the top plate hoisting hole 14 is reserved in the top plate 1, and the post-poured concrete in the range of the top plate hoisting hole 14 is embedded with the pre-poured top plate ring beam 11, the top plate longitudinal beam 12 and the top plate cross beam 13 through the reserved top plate ring beam rebate 111, the top plate longitudinal beam rebate 121 and the top plate cross beam rebate 131.

[0059] Meanwhile, the cut-off place of the opening steel bar is connected through a steel bar adapter, the top plate ring beam rebate 111 is arranged on the inner side of the whole ring, is disconnected at the position of the cross beam, the top plate longitudinal beam rebate 121 and the top plate cross beam rebate 131 are arranged towards the larger top plate hoisting hole 14, and the post-poured concrete in the top plate hoisting hole 14 adopts micro-expanding concrete with one higher strength grade than the pre-poured structure such as the longitudinal beam, and is constructed after the completion of the shield launching and receiving.

[0060] Specifically, the composite interface of the enclosure structure 21 and the inner lining wall 22 is brushed with cement-based permeable crystalline waterproof coating to strengthen the waterproofness of the composite wall.

[0061] Specifically, the inner lining wall hidden ring beam 222 is further arranged in the inner lining wall 22, and the vertical and horizontal position of the inner lining wall hidden ring beam 222 is within the range of the pre-poured ring beam 221 of the inner lining wall.

[0062] Specifically, the top plate ring beam 11 is fixedly connected with the enclosure structure 21 through an enclosure structure inner reserved steel bar adapter or a planted steel bar.

[0063] More specifically, when the steel bar adapter is used for connection, the adapter needs to be pre-buried when the enclosure structure steel bar cage is made, and when the planted steel bar is used for connection, the corresponding structure can be connected according to the planted steel bar requirements when the foundation pit is excavated to the corresponding position.

[0064] Specifically, the hidden beam 31 in the base slab 3 is connected to the hidden beam 15 in the top slab through the hidden column 431 of the intermediate partition wall. The base slab 3 is fixedly connected to the enclosure structure 21 through the pre-reserved steel bar connector or rebar installation within the enclosure structure. The steel bars of the hidden beam 31 are installed simultaneously with the installation of the base slab steel bars, and the base slab 3 and the hidden beam 31 are poured in one go.

[0065] Specifically, the internal partition wall 4 includes a longitudinal partition wall 41, a transverse partition wall 42, and a partition wall 43 for use. The longitudinal partition wall 41, the transverse partition wall 42, and the partition wall 43 for use form a three-dimensional grid structure.

[0066] Specifically, the transverse diaphragm 42 is equipped with a pre-cast ring beam 421 and a post-cast ring beam 422. The two transverse diaphragms 42 intersect perpendicularly with the four intermediate diaphragms. The longitudinal diaphragm 41 is disconnected in the middle of the working shaft and is only installed at the ends of the working shaft. The transverse diaphragms 42 are arranged horizontally and are in a continuous state. Each wall has two shield launching and receiving portals. The longitudinal beam 12 on the top plate above the longitudinal diaphragm 41 and the transverse beam 13 on the top plate above the transverse diaphragm 42 are both in a continuous state.

[0067] A construction method for the main structure of a circular working well includes the following steps:

[0068] A. Construct the cylindrical enclosure structure 21 and install the upper support;

[0069] B. Excavate the foundation pit to the plane below the bottom of the top slab ring beam, and construct the top slab ring beam 11 in reverse order;

[0070] C. Continue excavation in sections, and construct the inner lining wall 22 in reverse layer by layer;

[0071] D. Excavate the foundation pit to the bottom of the pit, and construct the last section of the inner lining wall 22, the bottom slab 3, and the hidden beam 31 of the bottom slab in one go;

[0072] E. Construct longitudinal partition wall 41 and transverse partition wall 42;

[0073] F. Demolish the retaining structure 21 and the inner lining wall hidden ring beam 222 within the scope of the side wall opening; shield hoisting, launching, receiving and hoisting out;

[0074] G. After constructing the transverse diaphragm wall, pour the ring beam 422;

[0075] H. During the construction and use phase, the partition wall 43 and the top plate hoisting holes 14 are located on the top plate;

[0076] I. Backfill with soil to complete the construction.

[0077] Specifically, step A involves constructing the cylindrical enclosure structure 21 and installing the upper support, as detailed below:

[0078] First, the construction of the cylindrical enclosure 21;

[0079] Then, from top to bottom excavation and support to the roof 1 position of the main structure.

[0080] Specifically, step B excavate the foundation to the top plate ring beam bottom plane, reverse construction top plate ring beam 11, as follows:

[0081] First, excavate the foundation plane to the top plate ring beam 11 below 0.5m;

[0082] Then, reverse construction top plate ring beam 11 and enclosure 21 fixed connection.

[0083] Specifically, step C continues to excavate, stratified reverse construction lining wall 22, as follows:

[0084] First, depending on the height of the main structure, excavate the foundation bottom plane to the bottom of the Nth lining wall in turn;

[0085] Then, stratified reverse construction lining wall 22;

[0086] Finally, the segment joint pre-embedded grouting pipe for grouting and setting water stop steel plate.

[0087] As a specific implementation, this embodiment is divided into 3m height excavation reverse construction lining wall 22, and the lining wall outside below the top plate ring beam 11 is provided with a composite wall shear slot 23 embedded in the enclosure 21. The composite wall shear slot 23 is cut off when the hole is opened, and the lining wall 22 is reverse constructed when the hole is opened. The lining wall 22, the lining wall precast ring beam 221 and the lining wall hidden ring beam 222 are precast, and the reinforcement cage and concrete pouring are constructed together.

[0088] Specifically, step D excavate the foundation to the bottom of the foundation, and once construct the last segment of lining wall 22, bottom plate 3 and bottom plate hidden beam 31, as follows:

[0089] First, excavate the foundation to the bottom, and construct the cushion and bottom plate waterproof layer;

[0090] Then, the last segment of lining wall 22 is poured with the bottom plate 3 and the bottom plate hidden beam 31 at one time, and the bottom plate is fixedly connected with the enclosure 21.

[0091] Specifically, step E constructs the longitudinal partition wall 41 and the transverse partition wall 42, as follows:

[0092] Construct the longitudinal partition wall 41 and the transverse partition wall 42, the top plate longitudinal beam 12 and the top plate transverse beam 13 inside the main structure, and the transverse partition wall precast ring beam 421 is poured with the transverse partition wall.

[0093] Specifically, step F involves breaking through the retaining structure 21 of the side wall opening area, the inner lining wall hidden ring beam 222, the transverse diaphragm wall first casting ring beam 421, and the shield hoisting, launching, receiving, and hoisting out, as detailed below:

[0094] The shield tunneling process includes breaking through the enclosure structure 21 and the inner lining wall hidden ring beam 222 within the side wall opening area, and then hoisting, launching, receiving, and lifting out the shield tunnel.

[0095] Specifically, step G involves constructing the transverse diaphragm wall followed by the cast-in-place ring beam 422, as detailed below:

[0096] After the tunnel boring machine (TBM) starts or receives the segment assembly, the transverse diaphragm wall is constructed and the ring beam 422 is poured.

[0097] Specifically, during the construction and use phase of step H, the top slab at partition wall 43 and top slab hoisting holes 14 is as follows:

[0098] The internal partition wall 43, the top slab 1 and the hidden beam 15 of the top slab are poured within the range of the four service stages of the internal partition wall 43 and the top slab hoisting hole 14.

[0099] Specifically, step I involves backfilling and covering the soil to complete the construction, as detailed below:

[0100] After applying the waterproof layer and fine aggregate concrete protective layer to the top slab, backfill with soil to complete the construction.

[0101] The circular working shaft main structure of this utility model is used in multiple ultra-deep working shafts (all exceeding 40m in depth) of the Shenzhen-Daya Bay Intercity Railway. The outer diameter of the circular working shaft main structure is 36m, and the thickness of the inner lining wall in the composite wall is 1m, which is nearly 50% better than the side wall thickness (2m) of conventional rectangular working shafts. The circular inner lining wall is constructed using the reverse construction method, and with the internal longitudinal and transverse beam (wall) system, the stability and safety of the multi-opening structure required for shield tunneling launch and reception are ensured while reducing the amount of structural materials used.

[0102] This utility model constructs a circular inner lining wall in reverse and forms a superimposed side wall with the enclosure structure, saving construction time; by utilizing the circular arch effect and the superimposed structural system, the thickness of the enclosure structure and inner lining wall is optimized, reducing the amount of engineering materials used.

[0103] This utility model features a grid-like intersecting longitudinal and transverse beam (wall) system with high support rigidity, enhancing the stability of multi-opening structures in ultra-deep circular working wells and effectively controlling ground deformation. The spatial layout of the longitudinal and transverse beam (wall) system is rational, reducing the span of the slabs and forming a self-balancing spatial force system. Even at great burial depths, the thickness of the top and bottom slabs is relatively small, achieving a flat slab surface without the need for cambering. The construction process and procedures are simple and controllable, resulting in more rational space utilization.

[0104] This utility model adopts the cast-in-place reverse construction method, which optimizes the construction process by excavating and pouring layers from top to bottom, combining permanent and temporary structural components, saving the amount of demolition work, and is green, low-carbon and economical.

Claims

1. A circular well bore body structure characterised in that: The side wall (2) is a hollow cylindrical structure. The upper end of the side wall (2) is provided with a top plate (1) at the top and a bottom plate (3) at the bottom. The internal space of the side wall (2) is provided with intersecting internal partitions (4) in a grid pattern. The internal partitions (4) divide the internal space. The inner lining wall (22) on the inner side of the side wall (2) is reserved with four shield tunneling starting and receiving openings.

2. A circular wellbore body structure according to claim 1, characterised in that: The top plate (1) includes a top plate ring beam (11) connected to the side wall (2). The top plate ring beam (11) has a longitudinal top plate beam (12) and a transverse top plate beam (13) in the middle. The top plate ring beam (11), the top plate longitudinal beam (12), and the top plate transverse beam (13) enclose each other to form a top plate hoisting hole (14).

3. A circular wellbore body structure according to claim 2, wherein: After the shield tunneling machine is launched or received, a hidden beam (15) is provided in the top plate (1), and the hidden beam (15) is located at the top plate hoisting hole (14).

4. A circular wellbore body structure according to claim 1, wherein: The side wall (2) includes an outer enclosure structure (21) and an inner lining wall (22) located inside. The enclosure structure (21) and the inner lining wall (22) form a composite wall, and a composite wall shear groove (23) is provided at the interface between the two.

5. A circular wellbore body structure according to claim 1, wherein: The inner lining wall (22) is provided with a spatially irregular inner lining wall precast ring beam (221). The inner lining wall precast ring beam (221) is projected as a circle in the longitudinal direction of the tunnel, and the inner diameter of the projected circle is adapted to the diameter of the shield machine.

6. A circular wellbore body structure according to claim 2, wherein: The internal partition wall (4) includes a transverse partition wall (42), which is aligned and connected to the top plate beam (13). A precast ring beam (421) is provided in the partition wall (42), and the inner diameter of the precast ring beam (421) is adapted to the diameter of the tunnel boring machine.

7. A circular wellbore body structure according to claim 2, wherein: The internal partition wall (4) includes a longitudinal partition wall (41), which is aligned and connected to the top plate longitudinal beam (12). The longitudinal partition wall (41) is disconnected in the middle of the working well.

8. A circular wellbore body structure according to claim 3, wherein: After the shield tunneling is launched or received, the internal partition wall (4) also includes a partition wall (43) in the use stage, which is perpendicular to the top slab hidden beam (15) and the bottom slab hidden beam (31).

9. A circular wellbore body structure according to claim 8, wherein: The bottom slab hidden beam (31) is provided with a partition wall hidden column (431) for the use stage, and the partition wall hidden column (431) for the use stage is aligned and connected with the top slab hidden beam (15) and the bottom slab hidden beam (31).

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