A temporary support structure for a shield tunnel

Abstract

The utility model discloses a kind of shield tunnel temporary support structures, including the bottom arc-shaped block of being detachably connected in sequence with ring around the inner wall of shield tunnel, left side arc-shaped block, left upper arc-shaped block, top arc-shaped block, right upper arc-shaped block and right side arc-shaped block, bottom arc-shaped block is located at the bottom of shield tunnel, left and right ends of bottom arc-shaped block are respectively provided with left support frame and right support frame, left foot support is equipped on left upper arc-shaped block, right foot support is equipped on right upper arc-shaped block, left foot support is detachably connected with left support frame, right foot support is detachably connected with right support frame, the lower part of left side arc-shaped block is detachably fixed on left support frame, upper part is detachably fixed on left foot support, the lower part of right side arc-shaped block is detachably fixed on right support frame, upper part is detachably fixed on right foot support, left foot support and right foot support are detachably connected by intermediate connecting rod. The shield tunnel temporary support structure of the utility model is limited by small operation space, construction efficiency is high, support protection effect is good, easy to remove in later period, can be reused.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, specifically to a temporary support structure for shield tunnels. Background Technology

[0002] During subway tunnel construction, to meet the subway's fire prevention and drainage requirements, a connecting passage must be installed every 500 meters between the two tunnel sections to connect them. Construction requires dismantling and removing the lining structure of the tunnel at the construction location, which will damage the integrity of the assembled segments. To ensure the safety of the tunnel and prevent excessive deformation of the lining structure (segments), steel frames must be used to support and reinforce the tunnel segments before constructing the connecting passage.

[0003] Currently, the common reinforcement method involves welding H-beams to form a steel frame to support the tunnel segments. For example, Chinese patent document application number 202121174122.4 discloses a segment support reinforcement structure for tunnel connecting passage construction, comprising: an open-ended circumferential H-beam support with an opening at the connecting passage; the open-ended circumferential H-beam support containing a first vertical H-beam support, a second vertical H-beam support, and a first horizontal H-beam support; the first vertical H-beam support connecting to the open-ended circumferential H-beam support at both ends; the second vertical H-beam support connecting to the open-ended circumferential H-beam support at both ends; and the first horizontal H-beam support connecting to the upper ends of the first and second vertical H-beam supports, together forming a first passage. This segment support reinforcement structure has the following shortcomings: 1) Assembly is carried out by welding. The welding process needs to be carried out inside the tunnel, which is greatly restricted by the working space, takes a long time, and is inefficient. 2) Due to processing errors, the top of the support often cannot fit tightly with the tunnel segment, resulting in poor support and protection for the segment; 3) On-site welding and assembly are adopted, and cutting operations are required during dismantling. This is labor-intensive, and the cutting will cause loss of steel frame length, affecting its reuse and causing waste of resources. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a temporary support structure for shield tunnels that is less restricted by the working space, has high construction efficiency, good support and protection effect, is easy to dismantle later, and can be reused.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A temporary support structure for a shield tunnel includes a bottom arc-shaped block, a left arc-shaped block, an upper left arc-shaped block, a top arc-shaped block, an upper right arc-shaped block, and a right arc-shaped block that are detachably connected in a ring around the inner wall of the shield tunnel. The bottom arc-shaped block is located at the bottom of the shield tunnel. A left support and a right support are respectively provided at the left and right ends of the bottom arc-shaped block. A left leg is provided on the upper left arc-shaped block, and a right leg is provided on the upper right arc-shaped block. The left leg and the right leg are detachably connected to the left support and the right leg, respectively. The lower part of the left arc-shaped block is detachably fixed to the left support and the upper part is detachably fixed to the left leg. The lower part of the right arc-shaped block is detachably fixed to the right support and the upper part is detachably fixed to the right leg. The left leg and the right leg are detachably connected by an intermediate connecting rod.

[0006] As a further improvement to the above technical solution: A telescopic adjustment rod is provided between the left and right legs.

[0007] The telescopic adjustment rod includes a sleeve rod and two crossbars. One end of each of the two crossbars is fixed to the left and right legs, respectively. Both ends of the sleeve rod are movably connected to the other ends of the two crossbars. A locking component is provided between the sleeve rod and each crossbar for locking both.

[0008] The locking assembly includes a locking bolt at the end of the sleeve and a plurality of locking holes on the crossbar, with each locking hole spaced apart along the length of the crossbar.

[0009] The left and right ends of the bottom arc-shaped block are respectively provided with adjustable lifting base supports, and the bottom ends of the left and right support frames are respectively fixed on the corresponding lifting base supports.

[0010] The lifting base includes a base, a support plate, and at least four screws respectively located at the four corners of the support plate. The base is fixed to the bottom arc-shaped block, the bottom of the screw is fixed to the base, and the top of the screw is clamped and fixed to the support plate by at least two nuts. The bottom ends of the left support and the right support are respectively fixed to the corresponding support plates.

[0011] A pad is provided between the base and the support plate.

[0012] The bottom of the screw is clamped to the base by at least two nuts.

[0013] The left support frame includes a left vertical rod and a left connecting rod fixed to the left vertical rod; the right support frame includes a right vertical rod and a right connecting rod fixed to the right vertical rod; the left leg includes a left upright rod and a left connecting rod fixed to the left upright rod; the right leg includes a right upright rod and a right connecting rod fixed to the right upright rod; the bottom ends of the left and right vertical rods are both located on the bottom arc-shaped block; the bottom end of the left upright rod is fixedly connected to the top end of the left vertical rod by fixing bolts, and the top end is fixedly connected to the upper left arc-shaped block; the bottom end of the right upright rod is fixedly connected to the top end of the right vertical rod by fixing bolts, and the top end is fixedly connected to the upper right arc-shaped block; the left arc-shaped block is fixed to the left connecting rod and the left connecting rod by fixing bolts; the right arc-shaped block is fixed to the right connecting rod and the right connecting rod by fixing bolts; the two ends of the middle connecting rod are respectively fixed to the left and right upright rods by fixing bolts.

[0014] The opposite ends of the bottom arc-shaped block, left arc-shaped block, upper left arc-shaped block, top arc-shaped block, upper right arc-shaped block, and right arc-shaped block are all fixedly connected by fixing bolts.

[0015] Compared with the prior art, the advantages of this utility model are: This utility model's temporary support structure for shield tunnels, due to its detachable connection, can be divided into multiple parts (such as the bottom arc-shaped block, left and right support components; the left arc-shaped block; the upper left arc-shaped block, left leg, upper right arc-shaped block, right leg, and middle connecting rod components; the top arc-shaped block; and the right arc-shaped block) for transportation and on-site assembly. Firstly, compared to welding and assembly, it is less restricted by working space, less time-consuming, and has higher construction efficiency. Secondly, it is easy to adjust, ensuring that the bottom, left, upper left, top, upper right, and right arc-shaped blocks fit tightly against the tunnel segments on the inner wall of the shield tunnel, providing good support and protection for the tunnel segments. Thirdly, it is easy to dismantle later and can be reused, reducing resource waste. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the temporary support structure for shield tunnels according to this utility model.

[0017] Figure 2 yes Figure 1 A magnified structural diagram of point A in the middle.

[0018] Figure 3 yes Figure 1 A magnified structural diagram at point B in the middle.

[0019] Figure 4 This is a state diagram of the overall transportation process of the left and right legs of the temporary support structure for shield tunnels of this utility model.

[0020] The labels in the diagram represent: 1. Bottom arc-shaped block; 2. Left arc-shaped block; 3. Upper left arc-shaped block; 31. Left leg; 311. Left upright; 312. Left connecting rod; 4. Top arc-shaped block; 5. Upper right arc-shaped block; 51. Right leg; 511. Right upright; 512. Right connecting rod; 6. Right arc-shaped block; 7. Left support frame; 71. Left vertical rod; 72. Left connecting rod; 8. Right support frame; 81. Right vertical rod; 82. Right connecting rod; 9. Middle connecting rod; 10. Shield tunnel; 11. Telescopic adjustment rod; 111. Sleeve rod; 112. Horizontal bar; 113. Locking assembly; 114. Locking bolt; 115. Lock hole; 12. Lifting base support; 121. Base; 122. Support plate; 123. Screw; 124. Nut; 125. Pad; 13. Fixing bolt. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] Figures 1 to 3This invention illustrates an embodiment of a temporary support structure for a shield tunnel. The temporary support structure includes a bottom arc-shaped block 1, a left arc-shaped block 2, a top left arc-shaped block 3, a top arc-shaped block 4, a top right arc-shaped block 5, and a right arc-shaped block 6, which are sequentially and detachably connected in a ring around the inner wall of the shield tunnel 10. The bottom arc-shaped block 1 is located at the bottom of the shield tunnel 10. A left support 7 and a right support 8 are respectively provided at the left and right ends of the bottom arc-shaped block 1. The left leg 31 is provided on the block 3, and the right leg 51 is provided on the upper right arc block 5. The left leg 31 is detachably connected to the left support 7, and the right leg 51 is detachably connected to the right support 8. The lower part of the left arc block 2 is detachably fixed to the left support 7, and the upper part is detachably fixed to the left leg 31. The lower part of the right arc block 6 is detachably fixed to the right support 8, and the upper part is detachably fixed to the right leg 51. The left leg 31 and the right leg 51 are detachably connected by the middle connecting rod 9.

[0026] This temporary support structure for the shield tunnel, due to its detachable connection, can be divided into multiple parts (such as the bottom arc-shaped block 1, left support 7 and right support 8; the left arc-shaped block 2; the upper left arc-shaped block 3, left leg 31, upper right arc-shaped block 5, right leg 51 and middle connecting rod 9; the top arc-shaped block 4; and the right arc-shaped block 6) for transportation and on-site assembly. Firstly, compared to welding and assembly, it is less restricted by working space, takes less time, and has higher construction efficiency. Secondly, it is easy to adjust, ensuring that the bottom arc-shaped block 1, left arc-shaped block 2, upper left arc-shaped block 3, top arc-shaped block 4, upper right arc-shaped block 5 and right arc-shaped block 6 are tightly fitted with the tunnel segments inside the shield tunnel 10, providing good support and protection for the tunnel segments inside the shield tunnel 10. Thirdly, it is easy to dismantle later and can be reused, reducing resource waste.

[0027] Furthermore, such as Figure 1 and Figure 2 As shown, in this embodiment, a telescopic adjustment rod 11 is provided between the left leg 31 and the right leg 51. This facilitates the overall transportation of the components, including the upper left arc-shaped block 3, the left leg 31, the upper right arc-shaped block 5, the right leg 51, and the intermediate connecting rod 9. The intermediate connecting rod 9 can be removed (or the original long intermediate connecting rod 9 can be replaced with a shorter one, and the length of the telescopic adjustment rod 11 can be adjusted to bring the left leg 31 and the right leg 51 closer together, facilitating transportation within the shield tunnel 10). Figure 4 As shown, a portal-shaped groove is formed between the left leg 31 and the right leg 51 below the telescopic adjustment rod 11, which fits perfectly onto the rail transport vehicle. This facilitates the transport of the upper left arc-shaped block 3, the left leg 31, the upper right arc-shaped block 5, the right leg 51, and the middle connecting rod 9 as a whole within the shield tunnel 10 via the rail transport vehicle.

[0028] Furthermore, such as Figure 2 As shown, in this embodiment, the telescopic adjustment rod 11 includes a sleeve rod 111 and two crossbars 112. One end of each crossbar 112 is fixed to the left leg 31 and the right leg 51, respectively. Both ends of the sleeve rod 111 are movably connected to the other ends of the two crossbars 112. A locking component 113 is provided between the sleeve rod 111 and each crossbar 112 to lock them together. The movable connection between the sleeve rod 111 and the two crossbars 112 allows for overall telescopic adjustment of the length.

[0029] Furthermore, in this embodiment, the locking assembly 113 includes a locking bolt 114 located at the end of the sleeve rod 111 and a plurality of locking holes 115 located on the crossbar 112, with each locking hole 115 spaced apart along the length direction of the crossbar 112. After the length of the telescopic adjustment rod 11 is adjusted, it is locked by the locking assembly 113 to prevent changes in length.

[0030] Furthermore, in this embodiment, the left and right ends of the bottom arc-shaped block 1 are respectively provided with adjustable lifting base supports 12, and the bottom ends of the left support 7 and the right support 8 are respectively fixed on the corresponding lifting base supports 12. In this way, by adjusting the lifting base supports 12, the left leg 31, the upper left arc-shaped block 3, the right leg 51, and the upper right arc-shaped block 5 can be adjusted to lift and lift the upper left arc-shaped block 3 and the upper right arc-shaped block 5, so that the upper left arc-shaped block 3 and the upper right arc-shaped block 5 are tightly fitted with the inner wall segments of the shield tunnel 10, which also facilitates the tight fitting of other arc-shaped blocks with the segments after assembly. Furthermore, such as Figure 3 As shown, in this embodiment, the lifting base support 12 includes a base 121, a support plate 122, and at least four screws 123 respectively located at the four corners of the support plate 122. The base 121 is fixed to the bottom arc-shaped block 1. The bottom of the screws 123 is fixed to the base 121, and the top of the screws 123 is clamped and fixed to the support plate 122 by at least two nuts 124. The bottom ends of the left support 7 and the right support 8 are respectively fixed to the corresponding support plates 122. By rotating the nuts 124 clamped and fixed to the support plate 122, the height of the support plate 122 can be easily adjusted, thereby adjusting the height of the left leg 31, the upper left arc-shaped block 3, the right leg 51, and the upper right arc-shaped block 5. The structure is simple and the adjustment is convenient.

[0031] Furthermore, in this embodiment, a pad 125 is provided between the base 121 and the support plate 122, which can improve the overall support strength of the lifting base 12.

[0032] Furthermore, in this embodiment, the bottom of the screw 123 is clamped to the base 121 by at least two nuts 124, which facilitates the disassembly and assembly of the lifting base 12 and can also assist in adjusting the height.

[0033] Furthermore, in this embodiment, the left support 7 includes a left vertical rod 71 and a left connecting rod 72 fixed to the left vertical rod 71; the right support 8 includes a right vertical rod 81 and a right connecting rod 82 fixed to the right vertical rod 81; the left leg 31 includes a left upright rod 311 and a left connecting rod 312 fixed to the left upright rod 311; and the right leg 51 includes a right upright rod 511 and a right connecting rod 512 fixed to the right upright rod 511. The bottom ends of both the left vertical rod 71 and the right vertical rod 81 are located on the bottom arc-shaped block 1. The bottom end of the left upright 311 is fixedly connected to the top end of the left vertical rod 71 by fixing bolts 13, and the top end is fixedly connected to the upper left arc-shaped block 3. The bottom end of the right upright 511 is fixedly connected to the top end of the right vertical rod 81 by fixing bolts 13, and the top end is fixedly connected to the upper right arc-shaped block 5. The left arc-shaped block 2 is fixed to the left connecting rod 72 and the left connecting rod 312 by fixing bolts 13. The right arc-shaped block 6 is fixed to the right connecting rod 82 and the right connecting rod 512 by fixing bolts 13. The two ends of the middle connecting rod 9 are fixed to the left upright 311 and the right upright 511 by fixing bolts 13 respectively. Specifically, the bottom ends of the left vertical rod 71 and the right vertical rod 81 are installed on the corresponding support plates 122. They can be welded to the support plates 122, fixed with screws, or fixed with the cooperation of screws 123 and nuts 124. The overall structure is simple and easy to process, manufacture, and disassemble.

[0034] Furthermore, in this embodiment, the opposite ends of the bottom arc-shaped block 1, the left arc-shaped block 2, the upper left arc-shaped block 3, the top arc-shaped block 4, the upper right arc-shaped block 5, and the right arc-shaped block 6 are all fixedly connected by fixing bolts 13, which facilitates disassembly and assembly.

[0035] To further clarify, the bottom arc-shaped block 1, the left arc-shaped block 2, the upper left arc-shaped block 3, the top arc-shaped block 4, the upper right arc-shaped block 5, and the right arc-shaped block 6 can be formed by detachably splicing multiple arc-shaped blocks (such as bolt connection), or they can be integrally formed or welded together as a whole.

[0036] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A temporary support structure for a shield tunnel, characterized in that: The shield tunnel (10) consists of a bottom arc-shaped block (1), a left arc-shaped block (2), a left upper arc-shaped block (3), a top arc-shaped block (4), a right upper arc-shaped block (5), and a right arc-shaped block (6) that are detachably connected in a ring around the inner wall of the shield tunnel (10). The bottom arc-shaped block (1) is located at the bottom of the shield tunnel (10). The left and right ends of the bottom arc-shaped block (1) are respectively provided with a left support (7) and a right support (8). The left upper arc-shaped block (3) is provided with a left leg (31), and the right upper arc-shaped block (5) is provided with a left support (31). There is a right leg (51), the left leg (31) is detachably connected to the left support (7), the right leg (51) is detachably connected to the right support (8), the lower part of the left arc-shaped block (2) is detachably fixed to the left support (7) and the upper part is detachably fixed to the left leg (31), the lower part of the right arc-shaped block (6) is detachably fixed to the right support (8) and the upper part is detachably fixed to the right leg (51), and the left leg (31) and the right leg (51) are detachably connected by a middle connecting rod (9).

2. The temporary support structure for shield tunnels according to claim 1, characterized in that: A telescopic adjustment rod (11) is provided between the left leg (31) and the right leg (51).

3. The temporary support structure for shield tunnels according to claim 2, characterized in that: The telescopic adjustment rod (11) includes a sleeve rod (111) and two crossbars (112). One end of each of the two crossbars (112) is fixed to the left leg (31) and the right leg (51) respectively. Both ends of the sleeve rod (111) are movably connected to the other ends of the two crossbars (112). A locking component (113) for locking both the sleeve rod (111) and each crossbar (112) is provided.

4. The temporary support structure for shield tunnels according to claim 3, characterized in that: The locking assembly (113) includes a locking bolt (114) at the end of the sleeve (111) and a plurality of locking holes (115) on the crossbar (112), with each locking hole (115) spaced apart along the length of the crossbar (112).

5. The temporary support structure for shield tunnels according to claim 1, characterized in that: The bottom arc-shaped block (1) is provided with adjustable lifting base supports (12) at its left and right ends respectively, and the bottom ends of the left support (7) and the right support (8) are fixed on the corresponding lifting base supports (12).

6. The temporary support structure for shield tunnels according to claim 5, characterized in that: The lifting base support (12) includes a base (121), a support plate (122) and at least four screws (123) respectively located at the four corners of the support plate (122). The base (121) is fixed on the bottom arc-shaped block (1). The bottom of the screw (123) is fixed on the base (121) and the top is clamped and fixed on the support plate (122) by at least two nuts (124). The bottom ends of the left support frame (7) and the right support frame (8) are respectively fixed on the corresponding support plates (122).

7. The temporary support structure for shield tunnels according to claim 6, characterized in that: A pad (125) is provided between the base (121) and the support plate (122).

8. The temporary support structure for shield tunnels according to claim 6, characterized in that: The bottom of the screw (123) is clamped to the base (121) by at least two nuts (124).

9. The temporary support structure for a shield tunnel according to any one of claims 1 to 8, characterized in that: The left support (7) includes a left vertical rod (71) and a left connecting rod (72) fixed on the left vertical rod (71). The right support (8) includes a right vertical rod (81) and a right connecting rod (82) fixed on the right vertical rod (81). The left leg (31) includes a left upright rod (311) and a left connecting rod (312) fixed on the left upright rod (311). The right leg (51) includes a right upright rod (511) and a right connecting rod (512) fixed on the right upright rod (511). The bottom ends of the left vertical rod (71) and the right vertical rod (81) are both located on the bottom arc-shaped block (1). The bottom end of the left upright (311) is fixedly connected to the top end of the left vertical rod (71) by a fixing bolt (13), and the top end is fixedly connected to the upper left arc-shaped block (3). The bottom end of the right upright (511) is fixedly connected to the top end of the right vertical rod (81) by a fixing bolt (13), and the top end is fixedly connected to the upper right arc-shaped block (5). The left arc-shaped block (2) is fixed to the left connecting rod (72) and the left connecting rod (312) by a fixing bolt (13). The right arc-shaped block (6) is fixed to the right connecting rod (82) and the right connecting rod (512) by a fixing bolt (13). The two ends of the middle connecting rod (9) are fixed to the left upright (311) and the right upright (511) by fixing bolts (13) respectively.

10. The temporary support structure for a shield tunnel according to any one of claims 1 to 8, characterized in that: The opposite ends of the bottom arc-shaped block (1), the left arc-shaped block (2), the upper left arc-shaped block (3), the top arc-shaped block (4), the upper right arc-shaped block (5), and the right arc-shaped block (6) are all fixedly connected by fixing bolts (13).

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