Waterproof structure of shield tunnel segment corner part

Abstract

The utility model provides a kind of shield tunnel segment corner part waterproof structure, including first first assembly segment, second first assembly segment, rear assembly segment, along tunnel annular, the first first assembly segment and the second first assembly segment are connected to form longitudinal seam, along tunnel longitudinal, the first first assembly segment and the second first assembly segment are connected to form ring gap with the rear assembly segment, at longitudinal seam and ring gap node, a local deepening section for accommodating the second first assembly segment longitudinal seam corner part extruded sealing element is set in the sealing element groove of rear assembly segment, the depth of the local deepening section is greater than the depth of rear assembly segment sealing element groove normal section, the sealing element groove of rear assembly segment is filled with rear assembly segment sealing element, and the gap between the rear assembly segment sealing element and the first first assembly segment longitudinal seam corner part compressed sealing element is filled with blocking element.

Description

Technical Field

[0001] This utility model relates to the field of waterproof sealing components at the corners of shield tunnel segments, and in particular to a waterproof structure for the corners of shield tunnel segments. Background Technology

[0002] The sealing and waterproofing performance of tunnel segment lining directly affects the operational safety of the tunnel. The sealing and waterproofing of the segment lining relies on the tight compression of seals between segments and between rings. However, during the actual assembly of the segment lining, there is significant frictional resistance between the seals of later-assembled segments and those of already assembled segments. This causes the seals at the corners of the segments to be squeezed out or compressed, resulting in corner seals of varying heights on both sides of the longitudinal joint. The squeezed-out seals cannot be pressed back into their original grooves, leading to uneven waterproof seals on the ring surface after the entire ring of segments is assembled. During the assembly of the next ring, the three seals at the joints of the longitudinal and circumferential joints will exhibit extremely complex compressive stress states. At this point, areas with lower compressive stress or even voids become weak points in the waterproofing of the segment lining joints, leading to frequent water leakage at the joints of the longitudinal and circumferential joints in the assembled tunnel.

[0003] Currently, there is no effective method to address the leakage problem in tunnel lining caused by the extrusion of the aforementioned seals. Simply using grouting to plug the water is insufficient to fundamentally solve the problem and can easily lead to secondary leakage. Therefore, addressing the accumulation of seals in the grooves and corners of the tunnel lining seals at the design stage is crucial for reducing leakage at tunnel joints. Utility Model Content

[0004] The purpose of this utility model is to overcome the defects of the prior art and provide a waterproof structure for the corner of the shield tunnel segment. This utility model solves at least some of the problems in the prior art.

[0005] This utility model is implemented as follows:

[0006] This utility model provides a waterproof structure for the corner of a shield tunnel segment, including a first pre-assembled segment, a second pre-assembled segment, and a rear-assembled segment. Along the tunnel circumferential direction, the first and second pre-assembled segments are connected to form a longitudinal joint. Along the tunnel longitudinal direction, both the first and second pre-assembled segments are connected to the rear-assembled segment to form an annular joint. At the junction of the longitudinal joint and the annular joint, a partially deepened section is provided in the sealing groove of the rear-assembled segment to accommodate the seal that has been squeezed out at the corner of the longitudinal joint of the second pre-assembled segment. The depth of the partially deepened section is greater than the depth of the normal section of the sealing groove of the rear-assembled segment. The sealing groove of the rear-assembled segment is filled with the sealing element of the rear-assembled segment. The gap between the sealing element of the rear-assembled segment and the sealing element that has been pressed at the corner of the longitudinal joint of the first pre-assembled segment is filled with a sealing element.

[0007] Furthermore, the rear-assembled segment seal is fitted into the seal groove of the rear-assembled segment.

[0008] Furthermore, the locally deepened section is smoothly connected to the normal section of the groove of the post-assembled segment seal by a ramp transition section.

[0009] Furthermore, the slope of the transition section is 1:5.

[0010] Furthermore, the length of the locally deepened section extending along the sealing groove of the later-assembled segment is not less than twice the depth of the normal section of the sealing groove of the later-assembled segment.

[0011] Furthermore, the length of the locally deepened section extending along the sealing groove of the later-assembled pipe segment is 30mm.

[0012] Furthermore, the width of the locally deepened section is the same as the width of the normal section of the groove in the post-assembled segment seal.

[0013] Furthermore, the depth of the locally deepened section is 2mm to 3mm.

[0014] Furthermore, the sealing component is a high-viscosity structural adhesive.

[0015] Furthermore, the sealing element is a prefabricated protrusion of the post-assembled segment seal.

[0016] This utility model has the following beneficial effects:

[0017] 1. This utility model, by adding a locally deepened section in the sealing groove of the later-assembled segment at the joint of the longitudinal and circumferential seams, can effectively accommodate the corner seals extruded from the longitudinal seams of the earlier-assembled segments, ensuring a tight fit between the seals of the earlier-assembled segments and the later-assembled segments. The high-viscosity structural adhesive can eliminate the misalignment between the corner seals, thereby eliminating possible local voids, allowing stress to be redistributed, reducing uneven stress distribution after segment assembly, and thus ensuring the waterproof performance of the segment lining. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a planar development diagram of the traditional longitudinal joint and circumferential joint (the diagram shows the part where the first pre-assembled segment seal is pressed and the protruding part where the second pre-assembled segment seal is squeezed out at the corner of the longitudinal joint).

[0020] Figure 2 A plan view of the longitudinal and circumferential joint nodes provided for an embodiment of this utility model (the groove of the sealing element of the later assembled tube segment has not yet been filled with the sealing element of the later assembled tube segment).

[0021] Figure 3 A plan view of the longitudinal and circumferential joint nodes provided for an embodiment of this utility model (a schematic diagram of the sealing groove of the later assembled pipe segment filled with the sealing element of the later assembled pipe segment).

[0022] In the diagram: 1. First pre-assembled segment; 2. Sealing groove of the first pre-assembled segment; 3. Sealing element of the first pre-assembled segment; 4. Pressed part of the sealing element of the first pre-assembled segment; 5. Second pre-assembled segment; 6. Sealing groove of the second pre-assembled segment; 7. Sealing element of the second pre-assembled segment; 8. Extruded protrusion of the sealing element of the second pre-assembled segment; 9. Sealing groove of the last pre-assembled segment; 10. Sealing element of the last pre-assembled segment; 11. Partially deepened section; 12. Sloping transition section; 13. Normal section; 14. High-viscosity structural adhesive; 15. Longitudinal seam; 16. Circumferential seam. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0024] In the description of this utility model, it should be understood that the terms "center", "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.

[0025] 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0026] like Figures 1-3 This utility model embodiment provides a waterproof structure for the corner section of a shield tunnel segment, including a first pre-assembled segment 1, a second pre-assembled segment 5, and a rear-assembled segment. Along the circumferential direction of the tunnel, the first pre-assembled segment 1 and the second pre-assembled segment 5 are connected to form a longitudinal joint 15. Along the longitudinal direction of the tunnel, both the first pre-assembled segment 1 and the second pre-assembled segment 5 are connected to the rear-assembled segment to form an annular joint 16. At the node between the longitudinal joint and the annular joint (the intersection of the longitudinal joint and the annular joint), a waterproof structure is constructed at the corner section of the rear-assembled segment. The sealing groove 9 of the segment is provided with a partially deepened section 11 for accommodating the seal that is squeezed out at the corner of the longitudinal seam of the second pre-assembled segment. The depth of the partially deepened section 11 is greater than the depth of the normal section 13 of the sealing groove of the subsequent segment (the depth direction is the longitudinal direction of the tunnel). The sealing groove 9 of the subsequent segment is filled with a subsequent segment seal 10. The gap between the subsequent segment seal 10 and the seal that is pressed at the corner of the longitudinal seam of the first pre-assembled segment is filled with a sealing element.

[0027] The rear-assembled segment seal 10 is fitted into the sealing groove 9 of the rear-assembled segment, and the protruding part 8 of the second pre-assembled segment seal pushes the rear-assembled segment seal 10 into the locally deepened section 11. The sealing groove 9 of the rear-assembled segment is arranged around the circumference of the rear-assembled segment, and the sealing groove 9 of the rear-assembled segment is filled with the sealing element 10 of the rear-assembled segment; the sealing groove 2 of the first-assembled segment is arranged around the circumference of the first-assembled segment 1, and the sealing groove 2 of the first-assembled segment is filled with the sealing element 3 of the first-assembled segment; the sealing groove 6 of the second-assembled segment is arranged around the circumference of the second-assembled segment 5, and the sealing groove 6 of the second-assembled segment is filled with the sealing element 7 of the second-assembled segment. The sealing elements 3 and 7 of the first-assembled segment cooperate and press with the sealing element 10 of the rear-assembled segment to seal the circumferential gap. The sealing groove is pasted on the side wall of the corresponding segment. This is the prior art and will not be described in detail here. After the first pre-assembled segment 1 is installed, when the second pre-assembled segment 5 is installed longitudinally along the tunnel, there is a large frictional resistance between the second pre-assembled segment seal 7 and the first pre-assembled segment seal 3. This causes the first pre-assembled segment seal 3 to have a compressed part 4 at the segment corner, and the second pre-assembled segment 5 to have a squeezed protrusion 8 at the segment corner. The segment corner is the end corner of the segment. The compressed part 4 and the squeezed protrusion 8 of the first pre-assembled segment seal cannot fit perfectly with the subsequent pre-assembled segment seal 10, resulting in water seepage gaps. The waterproof structure at the corner of the shield tunnel segment provided by this utility model can solve the above problems.

[0028] The locally deepened section 11 and the normal section 13 of the groove for the post-assembled segment seal are smoothly connected by a ramp transition section 12. In this embodiment, the slope of the ramp transition section 12 is 1:5.

[0029] The length of the partially deepened section 11 extending along the sealing groove 9 of the subsequently assembled pipe segment is not less than twice the depth of the normal section 13 of the sealing groove of the subsequently assembled pipe segment. In this embodiment, the length of the partially deepened section 11 extending along the sealing groove of the subsequently assembled pipe segment is 30 mm.

[0030] The width of the partially deepened section 11 is the same as the width of the normal section 13 of the groove for the post-assembled segment seal. The depth of the partially deepened section 11 is 2mm to 3mm.

[0031] In this embodiment, the sealing component is a high-viscosity structural adhesive 14. For example... Figure 3 The gap between the sealing element 10 of the later assembled segment and the sealing element at the corner of the longitudinal seam of the first assembled segment is filled and repaired with high-viscosity structural adhesive 14.

[0032] In another embodiment, the sealing element is a prefabricated protrusion of the later-assembled segment seal. When the later-assembled segment seal is manufactured, it forms a slope that fits against the pressed part 4 of the first-assembled segment seal. According to construction experience, the height of the prefabricated protrusion of the later-assembled segment seal is 5mm. When using this embodiment, the seal should be manufactured in strict accordance with the segment assembly sequence to prevent reverse installation.

[0033] This invention proposes a combined treatment measure for optimizing the groove of the sealing component of the later-assembled pipe segment and filling the extrusion area of ​​the corner seal. In the groove of the circumferential seal of the later-assembled pipe segment at the joint between the longitudinal and circumferential seams, a locally deepened section 11 is added to absorb the extruded corner seal of the earlier-assembled pipe segment, ensuring a tight fit between the seals. This eliminates potential local voids, redistributes stress, reduces uneven stress distribution after pipe segment assembly, and thus ensures the waterproof performance of the pipe segment lining. For misalignment in the extrusion area of ​​the corner seal (where the height of the pressed part of the first earlier-assembled pipe segment seal differs from the height of the extruded protrusion of the second earlier-assembled pipe segment seal), high-viscosity structural adhesive 8 is used for filling before the later-assembled pipe segments are assembled, making the surface smooth.

[0034] like Figures 1 to 3 As shown, during the segment assembly process, the corner seal of the longitudinal seam of the first assembled segment is pressed on one side and squeezed out on the other side. By adding a locally deepened section 5 in the groove 9 of the seal of the later assembled segment at the joint of the longitudinal seam and the circumferential seam, the squeezed corner seal can be absorbed. A transition section with a slope of 1:5 is set between the locally deepened section 5 and the normal section 7. Before the later assembled segment is assembled, the groove 9 of the seal of the later assembled segment is firmly pasted to the seal of the later assembled segment 10.

[0035] Before assembling the later-assembled segments, the corner seals that were extruded or pressed into the longitudinal seams of the earlier-assembled segments are filled. Specifically, high-viscosity structural adhesive 8 is used to fill the side with the smaller height, forming a 1:5 slope, which is then fitted and installed with the later-assembled segment seal 10.

[0036] After the later-assembled segments are assembled, the seals on both sides of the circumferential joint 16 (the first pre-assembled segment seal 3, the second pre-assembled segment seal 7, and the later-assembled segment seal 10) can be evenly compacted.

[0037] The waterproof structure at the corner of the shield tunnel segment provided by this utility model can effectively solve the problem of segment leakage caused by the extrusion and local accumulation of the segment corner seal during construction.

[0038] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A waterproof structure for the corner section of a shield tunnel segment, characterized in that: The system includes a first pre-assembled segment, a second pre-assembled segment, and a subsequent assembled segment. Along the tunnel circumference, the first and second pre-assembled segments are connected to form a longitudinal joint. Along the tunnel longitudinal direction, both the first and second pre-assembled segments are connected to the subsequent assembled segment to form an annular joint. At the junction of the longitudinal joint and the annular joint, a partially deepened section is provided in the sealing groove of the subsequent assembled segment to accommodate the seal that has been squeezed out at the corner of the longitudinal joint of the second pre-assembled segment. The depth of the partially deepened section is greater than the depth of the normal section of the sealing groove of the subsequent assembled segment. The sealing groove of the subsequent assembled segment is filled with the subsequent assembled segment seal. The gap between the sealing of the subsequent assembled segment and the seal that has been pressed at the corner of the longitudinal joint of the first pre-assembled segment is filled with a sealing element.

2. The waterproof structure at the corner of the shield tunnel segment as described in claim 1, characterized in that: The sealing element of the rear-assembled pipe segment is fitted into the groove of the sealing element of the rear-assembled pipe segment.

3. The waterproof structure at the corner of the shield tunnel segment as described in claim 1, characterized in that: The locally deepened section and the normal section of the groove of the post-assembled segment sealing element are smoothly connected by a sloping transition section.

4. The waterproof structure at the corner of the shield tunnel segment as described in claim 3, characterized in that: The slope of the transition section is 1:

5.

5. The waterproof structure at the corner of the shield tunnel segment as described in claim 1, characterized in that: The length of the locally deepened section extending along the sealing groove of the later assembled pipe segment is not less than twice the depth of the normal section of the sealing groove of the later assembled pipe segment.

6. The waterproof structure at the corner of the shield tunnel segment as described in claim 5, characterized in that: The length of the locally deepened section extending along the sealing groove of the later-assembled pipe segment is 30mm.

7. The waterproof structure at the corner of the shield tunnel segment as described in claim 1, characterized in that: The width of the locally deepened section is the same as the width of the normal section of the groove in the post-assembled segment seal.

8. The waterproof structure at the corner of the shield tunnel segment as described in claim 1, characterized in that: The depth of the locally deepened section is 2mm to 3mm.

9. The waterproof structure at the corner of the shield tunnel segment as described in claim 1, characterized in that: The sealing component is a high-viscosity structural adhesive.

10. The waterproof structure at the corner of the shield tunnel segment as described in claim 1, characterized in that: The sealing element is a prefabricated protrusion of the post-assembled segment seal.

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