Replaceable modular grout stop plate inside the dual-shield TBM tunnel

Abstract

This invention relates to a replaceable modular grout stop plate for a double-shield TBM, comprising an upper pressure plate, a lower pressure plate, a shield tail, an inner circular grout stop plate, and an outer circular grout stop plate. The upper pressure plate is installed on top of the lower pressure plate, and the lower pressure plate is connected to the upper pressure plate by a cylindrical pin welded to both the upper and lower pressure plates. A shield tail installation space is formed between one side of the upper pressure plate and the lower pressure plate. The shield tail is installed in the shield tail installation space and connected to the lower pressure plate by screws. A grout stop plate installation space is formed between the upper and lower pressure plates. The advantages of this invention are: the newly designed modular grout stop plate can be disassembled inside the tunnel with high disassembly efficiency, greatly reducing construction risks and shortening the construction period.

Description

Technical Field

[0001] This invention relates to a replaceable modular grout stop plate for a double-shield TBM tunnel, which falls within the relevant field. Background Technology

[0002] Double-shield TBMs are widely used in the construction of subway and urban tunnels in rocky terrain. Due to the harsh tunnel construction conditions, certain structures of the equipment experience significant wear. The TBM tail shield grout stop plate is one of the most important wear parts. Fixed to the tail shield wall, it is mainly used between the tunnel segments and the tunnel wall to prevent gravel grout from entering the shield body. If the grout stop plate is severely worn, a large amount of grout can enter the shield body, causing serious consequences. Therefore, timely detection and replacement of the grout stop plate is crucial. Due to the limitations of tunnel dimensions, replacing the grout stop plate inside the tunnel is currently difficult, requiring replacement only after obtaining sufficient space on an existing platform, resulting in low construction efficiency and impacting the overall project schedule.

[0003] Currently, the tail slurry stop plate of the dual-shield shield is mainly composed of multiple 65Mn spring plates arranged in a ring around the circumference of the tail shield. There are two types: inner and outer circular slurry stop plates. The structure is as follows: Figure 1 As shown, both the inner and outer circular grout stop plates consist of three layers arranged in a staggered pattern. When the grout stop plates are severely worn and need to be replaced, they cannot be replaced inside the tunnel; they must be replaced in the existing platform section. This is because the radial installation of the outer circular grout stop plate requires 290mm of space, but the gap between the tunnel wall (determined by the cutterhead) and the outer ring of the tail shield is only 75mm, making installation inside the tunnel impossible. Replacing them in the platform section would be complex and delay the construction period, while failure to replace them in time would increase construction risks. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention provides a replaceable modular grout stop plate for double-shield TBM tunnels. The technical solution of this invention is as follows:

[0005] A replaceable modular grout stop plate for a double-shield TBM includes an upper pressure plate, a lower pressure plate, a shield tail, an inner grout stop plate, and an outer grout stop plate. The upper pressure plate is installed on top of the lower pressure plate, and the lower pressure plate is connected to the upper pressure plate by a cylindrical pin welded to both the upper and lower pressure plates. A shield tail installation space is formed between one side of the upper pressure plate and the lower pressure plate. The shield tail 1 is installed in the shield tail installation space and connected to the lower pressure plate by screws. A grout stop plate installation space is formed between the upper and lower pressure plates. The outer grout stop plate is installed in the grout stop plate installation space near the upper pressure plate. The inner grout stop plate is installed in the grout stop plate installation space near the lower pressure plate. The cylindrical pin passes through both the outer and inner grout stop plates.

[0006] One end of the outer circular grout stop plate is located within the grout stop plate installation space, and the other end extends to the outside of the grout stop plate installation space, and is provided with an outer circular grout stop plate connection hole.

[0007] One end of the inner circular grout stop plate is located within the grout stop plate installation space, and the other end extends to the outside of the grout stop plate installation space, and is provided with an inner circular grout stop plate connection hole.

[0008] The outer circular grout stop plate is a three-layer grout stop plate.

[0009] The inner circular grout stop plate is a three-layer grout stop plate.

[0010] The advantages of this invention are: the newly designed modular grout stop plate can be disassembled inside the tunnel with high disassembly efficiency, which greatly reduces construction risks and shortens the construction period. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the main structure of the present invention. Implementation

[0012] The present invention will be further described below with reference to specific embodiments, and the advantages and features of the present invention will become clearer as a result. However, these embodiments are merely exemplary and do not constitute any limitation on the scope of the present invention. Those skilled in the art should understand that modifications or substitutions can be made to the details and form of the technical solutions of the present invention without departing from the spirit and scope of the present invention, but all such modifications and substitutions fall within the protection scope of the present invention.

[0013] See Figure 1 This invention relates to a replaceable modular grout stop plate for a double-shield TBM tunnel, comprising an upper pressure plate 3, a lower pressure plate 2, a shield tail 1, an inner circular grout stop plate 5, and an outer circular grout stop plate 4. The upper pressure plate 3 is installed on the upper part of the lower pressure plate 2, and the lower pressure plate 2 and the upper pressure plate 3 are connected together by a cylindrical pin 7, which is welded to the upper and lower pressure plates. A shield tail installation space is formed between one side of the upper pressure plate 3 and the lower pressure plate 2. The shield tail 1 is installed in the shield tail installation space and connected to the lower pressure plate 2 by screws 6. A grout stop plate installation space is formed between the upper pressure plate 3 and the lower pressure plate 2. The outer circular grout stop plate 4 is installed in the grout stop plate installation space near the upper pressure plate 3. The inner circular grout stop plate 5 is installed in the grout stop plate installation space near the lower pressure plate 2. The cylindrical pin 7 passes through the outer circular grout stop plate 4 and the inner circular grout stop plate 5.

[0014] One end of the outer circular grout stop plate 4 is located within the grout stop plate installation space, and the other end extends to the outside of the grout stop plate installation space, and is provided with an outer circular grout stop plate connection hole 13.

[0015] One end of the inner circular grout stop plate 5 is located within the grout stop plate installation space, and the other end extends to the outside of the grout stop plate installation space, and is provided with an inner circular grout stop plate connection hole.

[0016] Both the outer circular grout stop plate 4 and the inner circular grout stop plate 5 are three-layer grout stop plates.

[0017] The working principle of this invention is:

[0018] 1. The outer circular grout stop plate 4 and the inner circular grout stop plate 5 are connected together by a cylindrical pin 7, and then pressed onto the lower pressure plate 2 by the upper pressure plate 3 and connected by a cylindrical pin. At the same time, the cylindrical pin is welded to the upper pressure plate 3 and the lower pressure plate 2 to make them a whole.

[0019] 2. After welding, use a steel wire rope to pass through the connecting holes of the inner and outer circular grout stop plates, and then connect the inner circular grout stop plate 5 and the outer circular grout stop plate 4 together. After connection, the inner circular grout stop plate 5 and the outer circular grout stop plate 4 are bent as shown by the dotted line in the figure. The radial installation space of the inner circular grout stop plate 5 and the outer circular grout stop plate 4 is reduced to 75mm, which meets the conditions for installation inside the hole.

[0020] 3. At the same time, the lower pressure plate 2 is connected to the shield tail 1 with M10 screws, which makes disassembly convenient.

[0021] 4. Remove the wire rope after the connection is complete.

[0022] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A replaceable modular grout stop plate for a double-shield TBM tunnel, characterized in that, The shield includes an upper pressure plate, a lower pressure plate, a shield tail, an inner grout stop plate, and an outer grout stop plate. The upper pressure plate is installed on top of the lower pressure plate, and the lower pressure plate is connected to the upper pressure plate by a cylindrical pin, which is welded to both the upper and lower pressure plates. A shield tail mounting space is formed between one side of the upper pressure plate and the lower pressure plate. The shield tail is installed in the shield tail mounting space and connected to the lower pressure plate by screws. A grout stop plate mounting space is formed between the upper and lower pressure plates. The outer grout stop plate is installed in the grout stop plate mounting space near the upper pressure plate. The inner grout stop plate is installed in the grout stop plate mounting space near the lower pressure plate. The cylindrical pin passes through both the outer and inner grout stop plates. One end of the outer circular grout stop plate is located within the grout stop plate installation space, and the other end extends to the outside of the grout stop plate installation space, and is provided with an outer circular grout stop plate connection hole. One end of the inner circular grout stop plate is located within the grout stop plate installation space, and the other end extends to the outside of the grout stop plate installation space, and is provided with an inner circular grout stop plate connection hole.

2. The replaceable modular grout stop plate for a double-shield TBM tunnel according to claim 1, characterized in that, The outer circular grout stop plate is a three-layer grout stop plate.

3. The replaceable modular grout stop plate for a double-shield TBM tunnel according to claim 1, characterized in that, The inner circular grout stop plate is a three-layer grout stop plate.

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