A detachable bell and spigot negative annular tube sheet and method of use

Abstract

The present application relates to the technical fields of subway shield tunnel construction, especially to a detachable socket-and-spigot type negative ring segment and its using method, comprising a plurality of segment blocks, the plurality of segment blocks are assembled to form the negative ring segment, adjacent segment blocks are connected through annular connecting pieces to form concave-convex matching limiting connection, wherein each segment block except the top sealing block is composed of two segment block sub-units, the two segment block sub-units are connected in a detachable manner, a plurality of segment blocks are provided with detachable longitudinal connecting pieces, and the longitudinal connecting pieces are used to connect adjacent negative ring segments. The present application has the advantages of solving the problem of destructive removal of socket-and-spigot type segment, realizing the removal and reuse of negative ring segment, ensuring the safety during the removal of segment, and ensuring the performance of negative ring segment. The structure is simple and reasonable, easy to use, widely applicable, and suitable for promotion.

Description

Technical Field

[0001] This invention relates to the field of subway shield tunnel construction technology, and in particular to a detachable socket-type negative ring segment and its usage method. Background Technology

[0002] The negative ring segment connects the tunnel boring machine's power system and the rear support system. It is a temporary structure that provides reaction force for tunnel boring during the initial construction of the tunnel. The structure of the negative ring segment is the same as or similar to that of the positive ring segment, and it has sufficient rigidity and strength.

[0003] There are various connection methods for negative ring segments, among which the socket connection is a newer method. Its characteristic is that it does not require connecting bolts; instead, it uses longitudinal tenons to connect and fix adjacent rings. The advantages of the socket-type negative ring are convenient and quick installation and resistance to deformation. The disadvantage is that once assembled, it cannot be disassembled using conventional methods; the connection can only be broken destructively. After disassembly, the segments are damaged and difficult to reuse. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by providing a detachable socket-type negative ring segment and its usage method. Without altering the characteristics of the socket-type segment, the invention optimizes the segment structure to ensure the quality of segment formation while achieving the goal of detachability and reuse.

[0005] The objective of this invention is achieved through the following technical solutions:

[0006] A detachable socket-type negative ring segment is characterized in that it comprises several segment blocks, which are assembled to form a negative ring segment. Adjacent segment blocks are connected by circumferential connectors to form a concave-convex fit limiting connection. Each segment block, except for the capping block, is composed of two segment block sub-units, which are detachably fixedly connected. Each segment block is provided with a detachable longitudinal connector for connecting adjacent negative ring segments.

[0007] The circumferential connector includes a circumferential convex connector and a circumferential concave connector disposed at both ends of the segment. The shape and size of the circumferential convex connector and the circumferential concave connector are compatible. Adjacent segments are connected by the convex-concave fit of the circumferential convex connector and the circumferential concave connector to form a limiting connection.

[0008] The longitudinal connecting component includes a longitudinal component embedded part, a longitudinal component connecting part, and a longitudinal component positioning device, wherein the longitudinal component positioning device is locked to the longitudinal component embedded part and fixed on the segment block, and the longitudinal component connecting part is fixedly connected to the longitudinal component embedded part.

[0009] The longitudinal component positioning device consists of two symmetrical positioning plates, which are connected and fixed by fixing bolts. The positioning plates are provided with positioning bolts for connecting with the segments. The center of the positioning plate has positioning holes that match the embedded parts of the longitudinal component.

[0010] The segment sub-unit of the segment is provided with a connecting plate, and the connecting plate is provided with positioning spring pins and connecting bolts for positioning and connecting adjacent segment sub-units.

[0011] The segments are pre-embedded with lifting point components that match the dismantling lifting equipment.

[0012] Anti-loosening bolts are provided on both sides of the circumferential connectors between adjacent segments.

[0013] A method of using the aforementioned detachable socket-type negative ring segment, characterized in that the method includes the following steps:

[0014] During assembly, the corresponding segment sub-units are positioned by positioning spring pins and fixedly connected by connecting bolts to form segment assembly blocks; the segment assembly blocks are assembled into a ring by setting circumferential connectors at the connecting plate.

[0015] During dismantling, the fixed connection between the two segment sub-units of each segment assembly block is released, and each segment sub-unit is fixedly connected to the adjacent segment block in another adjacent segment assembly block through the positioning spring pin and the connecting bolt, so that each segment assembly block is reassembled into segment dismantling blocks while keeping the circumferential connector in the connected state. At the same time, anti-loosening bolts are installed on both sides of the circumferential connector.

[0016] The segments after being reorganized and divided into sections are dismantled in sequence.

[0017] Longitudinal component positioning devices are fixedly installed on the mating surfaces of adjacent negative ring segments. Each longitudinal component positioning device is locked and connected to the longitudinal component embedded part. Longitudinal component connecting parts are connected between the longitudinal component embedded parts on both sides, so that the adjacent negative ring segments are connected to form a whole.

[0018] The pre-embedded lifting points on the segment are connected to a dismantling lifting tool, which is then connected to a steel wire rope. With the steel wire rope taut, the connecting parts on the segment to be dismantled are removed.

[0019] The advantages of this invention are: it solves the problem of destructive dismantling of socket-type tunnel segments, enables the dismantling and reuse of negative ring tunnel segments, and ensures the performance of negative ring tunnel segments; it ensures safety during tunnel segment dismantling construction; it has a simple and reasonable structure, is easy to use, has a wide range of applications, and is suitable for promotion. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a single-piece structure of the socket-type tube sheet in this invention;

[0021] Figure 2 This is a schematic diagram of the longitudinal component of the socket tube sheet in this invention;

[0022] Figure 3 This is a schematic diagram of the transverse component of the socket tube sheet in this invention;

[0023] Figure 4 In this invention;

[0024] Figure 5 This is a schematic diagram of the connection method of the segment removal section in this invention;

[0025] Figure 6 This is a schematic diagram of the ring-forming cross-section of the present invention;

[0026] Figure 7 This is a schematic diagram of the dismantling process of the present invention;

[0027] Figure 8 This is a schematic diagram of the dismantling and hoisting points during the dismantling of the present invention;

[0028] Figure 9 This is a schematic diagram of the longitudinal component positioning device in this invention;

[0029] Figure 10 This is a schematic diagram of the dismantling lifting device in this invention;

[0030] Figure 11 This is a schematic diagram of the installation of the anti-loosening bolts on the circumferential component during disassembly of the present invention. Implementation

[0031] The features and other related features of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate understanding by those skilled in the art:

[0032] like Figure 1-11 As shown in the figure, markings 1-15 and M and N represent: longitudinal component embedded part 1, longitudinal component connecting part 2, circumferential component convex joint 3, circumferential component concave joint 4, longitudinal component positioning device 5, lifting point embedded part 6, connecting plate 7, connecting bolt 8, positioning spring pin 9, dismantling lifting tool 10, shackle 11, wire rope 12, fixing bolt 13, positioning bolt 14, anti-detachment bolt 15, segment line M, dismantling line N.

[0033] Example: Figures 1 to 11 As shown, in this embodiment, the pluggable negative ring segment is used to provide reaction force for shield tunneling and can be disassembled for reuse, effectively reducing construction costs.

[0034] The structure of this embodiment will be described below in conjunction with its usage method:

[0035] I. Installation Method:

[0036] 1) such as Figure 6 As shown, before assembling the detachable socket negative ring segment, a total of 11 segments need to be combined. Among them, DB1, XB1, DB2, XB2, DB3, XB3, DL1, XL1, DL2, and XL2 are segment sub-units. The segment sub-units DB1 and XB1 are combined into segment assembly block B1, the segment sub-units DB2 and XB2 are combined into segment assembly block B2, the segment sub-units DB3 and XB3 are combined into segment assembly block B3, the segment sub-units DL1 and XL1 are combined into segment assembly block L1, the segment sub-units DL2 and XL2 are combined into segment assembly block L2, and F is a separate segment assembly block, forming a total of six segment assembly blocks for assembly. There is no special meaning in naming the segment sub-units. D (large) and X (small) are used to distinguish the two small blocks on a segment for easy subsequent representation. B represents the standard block, L represents the adjacent block, and F represents the capping block.

[0037] In this embodiment, the connection and fixation between each segment sub-unit is achieved through... Figure 4 and Figure 5 The connecting plate 7 shown is used to achieve this. Specifically, connecting plates 7 are respectively provided at the splicing positions of adjacent segment sub-units. The connecting plates 7 of adjacent segment sub-units are initially positioned by positioning spring pins 9 to ensure that the positional accuracy between the spliced ​​adjacent segment sub-units meets the requirements. Then, the connecting plates 7 are fixedly connected by connecting bolts 8, thereby connecting the adjacent segment sub-units into a whole.

[0038] 2) The structure of the assembled tunnel segments is as follows: Figure 4 As shown in the diagram, circumferential connectors consisting of a circumferential male connector 3 and a circumferential female connector 4 are respectively provided on both sides of the segment assembly block. The circumferential male connector 3 and the circumferential female connector 4 are of matching shapes and sizes and are used for the assembly between the segment assembly blocks. For example, a circumferential male connector 3 is provided at the splicing position of a segment assembly block on one side, and a circumferential female connector 4 is provided at the corresponding splicing position of the adjacent segment assembly block on the other side. The two can form a male-female fit to realize the assembly between adjacent segment assembly blocks. The structure after assembly is as follows. Figure 11 As shown.

[0039] In this embodiment, in order to ensure the connection performance and positional accuracy between adjacent segment assembly blocks, circumferential protruding joints 3 and circumferential concave joints 4 are respectively provided on the segment assembly blocks along the longitudinal direction of the segments, so as to form a multi-point limiting fit connection with the adjacent segment assembly blocks.

[0040] 3) Before assembly, install the longitudinal connector 2 of the socket-type tube segment onto the tube segment to facilitate the connection between the negative ring tube segments, such as... Figure 1 and Figure 2 As shown. The positions and orientations of the circumferential male connector 3 and circumferential female connector 4 of each segment assembly are fixed, as shown. Figure 3 As shown, the assembly sequence of the tunnel segments is therefore unique: refer to the following during assembly. Figure 6 In the segmented line M, B2 is assembled first, followed by B1, B3, L1, and L2 in sequence according to the principle of close proximity of segments, and F is assembled last.

[0041] In this embodiment, the longitudinal component connector 2 is a detachable longitudinal connector to enable the removability of the negative ring segments. Specifically, during assembly, the longitudinal component positioning device 5 consists of two positioning plates connected and fixed by fixing bolts 13. The positioning plates are provided with positioning bolts 14 for connecting with the segment splicing sections. The center of the positioning plate has a positioning hole matching the longitudinal component embedded part 1. This longitudinal component positioning device 5 can lock the longitudinal component embedded part 1 and fix it to the longitudinal vertical surface of the segment splicing section using the positioning bolts 14. In use, the longitudinal component positioning device 5 is fitted around the longitudinal component embedded part 1 and then fixed by the fixing bolts 13. After the corresponding positions of adjacent negative ring segments are fixed with the longitudinal component embedded part 1 by the longitudinal component positioning device 5, the longitudinal component connector 2 is connected between the longitudinal component embedded parts 1 on both sides, allowing adjacent negative ring segments to be connected to form a whole, ensuring the performance of the negative ring segments. During dismantling, the longitudinal component can be removed by removing the positioning bolts 14 and fixing bolts 13 of the longitudinal component positioning device 5, thereby achieving separation between the negative ring segments.

[0042] II. Demolition Method:

[0043] After the tunnel boring machine has been excavating for a period of time, the friction between the soil and the tunnel segments can provide the reaction force required by the tunnel boring machine, and then the assembled negative ring tunnel segments can be removed.

[0044] 1) such as Figure 6 or Figure 7 As shown, during dismantling, the fixed connections between the sub-units of each segment assembly are released, that is, the connecting bolts 8 and the positioning spring pins 9 between the sub-units are released, and then the sub-units of each segment are reassembled into segment dismantling blocks. Specifically, along... Figure 6 or Figure 7 The demolition line N in the diagram combines segment sub-units DB1 and XB2 into segment demolition block CB1, segment sub-units DB2 and XB3 into segment demolition block CB2, segment sub-units DB3 and XL2 into segment demolition block CB3, segment sub-units DL1 and XB1 into segment demolition block CL1, and segment sub-units DL2, XL1, and segment block F into segment demolition block CL2, for a total of 5 combined demolition blocks. The segment sub-units are temporarily fixed together using connecting bolts 8 and positioning spring pins 9.

[0045] 2) such as Figure 11 As shown, before dismantling, anti-loosening bolts 15 are installed at the connecting plate of the segment circumferential member to ensure the structural stability of each segment after dismantling and reassembly. Figure 10 As shown, four dismantling lifting tools 10 are prepared for lifting the dismantling sections of the tunnel segments. The dismantling lifting tools 10 and the pre-embedded lifting point parts 6 embedded in the tunnel segment are connected together by shackles 11 and wire ropes 12.

[0046] 3) With the wire rope 12 taut, use a wrench, hammer, or other tools to remove the fixing bolts 13 and positioning bolts 14 of the longitudinal component positioning device 5, and remove the longitudinal component connecting piece 2 as a whole; then disassemble each segment and lift it away from the negative ring segment; simultaneously remove the connecting bolts 8 and positioning spring pins 9 on the connecting plate 7. Figure 8 For example, when the segment CL1 is removed first, lifting points are set on the segment sub-units XB1 and DL1 respectively. When the wire rope 12 is in a taut state, it can be ensured that the segment sub-units XB1 and DL1 are in a stable state under force. At this time, the connecting bolts 8 and positioning spring pins 9 between them can be removed. The segment sub-units of the remaining segments are still temporarily fixedly connected by the connecting bolts 8 and positioning spring pins 9, thereby ensuring the structural stability of the remaining parts of the negative ring segment to be removed.

[0047] 4) After all the connecting fasteners of the current segment dismantling section have been removed, check if there are any remaining parts. If the connecting fasteners have been completely removed, the segment dismantling section is lifted and transported to the ground by a crane connected to the wire rope 12.

[0048] 5) Following the steps above, dismantle the segments one by one in the order of upper, left and right sides, and lower combined segments.

[0049] Although the above embodiments have described the concept and embodiments of the present invention in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.

Claims

1. A detachable socket-type negative ring segment, characterized in that: It includes several segments, which are assembled to form a negative ring segment. Adjacent segments are connected by circumferential connectors to form a concave-convex fit limiting connection. Except for the capping block, each segment consists of two segment sub-units, which are detachably fixedly connected. Each segment is provided with a detachable longitudinal connector for connecting adjacent negative ring segments. The circumferential connector includes a circumferential protruding connector and a circumferential concave connector disposed at both ends of the segment. The shape and size of the circumferential protruding connector and the circumferential concave connector are compatible. Adjacent segments are connected by the convex-concave fit of the circumferential protruding connector and the circumferential concave connector to form a limiting connection. The longitudinal connecting component includes a longitudinal component embedded part, a longitudinal component connecting part, and a longitudinal component positioning device, wherein the longitudinal component positioning device is locked to the longitudinal component embedded part and fixed on the segment block, and the longitudinal component connecting part is fixedly connected to the longitudinal component embedded part. The longitudinal component positioning device consists of two symmetrical positioning plates, which are connected and fixed by fixing bolts. The positioning plates are provided with positioning bolts for connecting with the segments. The middle of the positioning plate has a positioning hole that matches the embedded part of the longitudinal component. The segment sub-unit of the segment is provided with a connecting plate, and the connecting plate is provided with positioning spring pins and connecting bolts for positioning and connecting adjacent segment sub-units.

2. The detachable socket-type negative ring segment according to claim 1, characterized in that: The segments are pre-embedded with lifting point components that match the dismantling lifting equipment.

3. A detachable socket-type negative ring segment according to claim 1, characterized in that: Anti-loosening bolts are provided on both sides of the circumferential connectors between adjacent segments.

4. A method of using the detachable socket-type negative ring segment according to any one of claims 1-3, characterized in that: The method of use includes the following steps: During assembly, the corresponding segment sub-units are positioned by positioning spring pins and fixedly connected by connecting bolts to form segment assembly blocks; the segment assembly blocks are assembled into a ring by setting circumferential connectors at the connecting plate. During dismantling, the fixed connection between the two segment sub-units of each segment assembly block is released, and each segment sub-unit is fixedly connected to the adjacent segment block in another adjacent segment assembly block through the positioning spring pin and the connecting bolt, so that each segment assembly block is reassembled into segment dismantling blocks while keeping the circumferential connector in the connected state. At the same time, anti-loosening bolts are installed on both sides of the circumferential connector. The segments after being reorganized and divided into sections are dismantled in sequence.

5. The method of using a detachable socket-type negative ring segment according to claim 4, characterized in that: Longitudinal component positioning devices are fixedly installed on the mating surfaces of adjacent negative ring segments. Each longitudinal component positioning device is locked and connected to the longitudinal component embedded part. Longitudinal component connecting parts are connected between the longitudinal component embedded parts on both sides, so that the adjacent negative ring segments are connected to form a whole.

6. The method of using a detachable socket-type negative ring segment according to claim 4, characterized in that: The pre-embedded lifting points on the segment are connected to a dismantling lifting tool, which is then connected to a steel wire rope. With the steel wire rope taut, the connecting parts on the segment to be dismantled are removed.

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