Connecting structure of shield tunnel duct pieces

Abstract

The invention relates to the technical field of shield tunnel engineering, in particular to a shield tunnel duct piece connecting structure which comprises a first duct piece and a second duct piece, a first sliding groove and a first protruding block are arranged at the end, facing the second duct piece, of the first duct piece in a spaced mode, and the first sliding groove and the first protruding block are collinearly arranged and extend in the axial direction of the first duct piece; one end, facing the first pipe piece, of the second pipe piece is correspondingly provided with a second convex block and a second sliding groove which are connected with the first sliding groove and the first convex block in an inserted mode; the first pipe piece and the second pipe piece are each provided with a bent hole allowing the bent bolt to penetrate through, and the bent bolt penetrates through the first pipe piece and the second pipe piece and is connected with the nut piece so as to fix the first pipe piece and the second pipe piece. The connecting structure of the shield tunnel segments can effectively solve the problems that in the shield tunnel segment splicing process, the rigidity of the segment joints is insufficient, and the bending moment resisting capacity is insufficient, and the connecting strength of the tunnel segment joints can be improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of shield tunnel engineering, and particularly relates to a connecting structure of a shield tunnel segment. BACKGROUND

[0002] With the development of subway traffic engineering, the requirements for the construction and construction technology of tunnel engineering are higher and higher. Tunnel engineering plays a crucial role in urban construction and infrastructure development, and shield tunneling, as an advanced tunneling technology, has gradually become the mainstream method for large-scale tunnel construction.

[0003] The shield tunnel segment, as the permanent lining structure of the shield tunnel, is the innermost barrier of the tunnel and bears the role of resisting soil pressure, groundwater pressure and some special loads. The shield tunnel segment lining structure is connected by segment joints to form a ring, and the assembly and connection of the tunnel segment is a key link in the construction process of the shield tunnel. At the same time, the segment joint is the weakest position in the segment structure, and its bearing capacity is poor, and the segment joint is prone to excessive deformation and local cracking, and further water leakage. Therefore, how to improve the pressure bearing capacity of the segment joint and prevent local cracking of the connection from causing subsequent cracking and water leakage has become a technical problem that needs to be solved by technical personnel in the field. SUMMARY

[0004] To solve the above technical problems, the present disclosure provides a connecting structure of a shield tunnel segment.

[0005] The present disclosure provides a connecting structure of a shield tunnel segment, comprising: A first segment and a second segment, one end of the first segment facing the second segment is provided with a first sliding groove and a first protrusion, the first sliding groove and the first protrusion are arranged in line and extend towards the axial direction of the first segment; one end of the second segment facing the first segment is provided with a second protrusion and a second sliding groove corresponding to the first sliding groove and the first protrusion for plug-in connection. The first segment and the second segment are both provided with a bent hole for a bent bolt to pass through, the bent bolt is arranged in the first segment and the second segment and connected with a nut piece to fix the first segment and the second segment.

[0006] In some embodiments, the connecting structure of the shield tunnel segment further comprises a water stop strip, the water stop strip is clamped between the first segment and the second segment.

[0007] In some embodiments, the first segment is provided with a first waterproof groove at one end thereof, the second segment is provided with a second waterproof groove at one end thereof, and the first waterproof groove and the second waterproof groove are oppositely arranged to form a waterproof cavity for accommodating the waterstop.

[0008] In some embodiments, the connecting structure of the shield tunnel segment further comprises a first anchor embedded in the first segment, and one end of the first anchor is connected with the first protrusion.

[0009] In some embodiments, the connecting structure of the shield tunnel segment further comprises a second anchor embedded in the second segment, and one end of the second anchor is connected with the second protrusion.

[0010] In some embodiments, the first segment is provided with a first flat groove at one end thereof, one end of the first protrusion is fixedly connected with the first flat groove, and the other end is slidably connected with the second sliding groove.

[0011] In some embodiments, the second segment is provided with a second flat groove at one end thereof, one end of the second protrusion is fixedly connected with the second flat groove, and the other end is slidably connected with the first sliding groove.

[0012] In some embodiments, the second sliding groove is a T-shaped groove, the first protrusion comprises two first parallel portions arranged in parallel and a first vertical portion perpendicular to the two first parallel portions, one of the first parallel portions is fixedly connected with the first flat groove, and the first vertical portion and the other first parallel portion are slidably connected with the second sliding groove.

[0013] In some embodiments, the first sliding groove is a T-shaped groove, the second protrusion comprises two second parallel portions arranged in parallel and a second vertical portion perpendicular to the two second parallel portions, one of the second parallel portions is fixedly connected with the second flat groove, and the second vertical portion and the other second parallel portion are slidably connected with the first sliding groove.

[0014] In some embodiments, the connecting structure of the shield tunnel segment further comprises a gasket, the gasket is sleeved on the bent bolt and clamped between the nut member and the hole end wall of the bent hole.

[0015] Compared with the prior art, the technical scheme provided by the embodiments of the present disclosure has the following advantages: The connection structure of this shield tunnel segment is simple in overall design and easy to assemble on site. By incorporating a first groove, a first protrusion, a second protrusion, and a second groove, the first and second segments are joined in a concave-convex fit. This increases the area of ​​the pressure zone at the segment joint under bending, reducing the risk of localized cracking at the joint. This, in turn, reduces the risk of the segment joint opening under external loads, leading to waterproofing failure and leakage at the joint. Furthermore, the locking action of the bent bolts and nuts further enhances the tightness of the connection between the first and second segments, further improving the compressive strength of the joint and reducing the likelihood of the joint opening under external loads. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0017] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the connection structure of the shield tunnel segments according to an embodiment of the present disclosure. Figure One ; Figure 2 This is a schematic diagram of the connection structure of the shield tunnel segments according to an embodiment of the present disclosure. Figure Two ; Figure 3 This is a schematic diagram of the connection structure of the shield tunnel segments according to an embodiment of the present disclosure. Figure Three ; Figure 4 This is a schematic diagram of the connection structure of the shield tunnel segments according to an embodiment of the present disclosure. Figure Four ; Figure 5 This is a schematic diagram of the connection structure of the shield tunnel segments according to an embodiment of the present disclosure. Figure Five ; Figure 6 This is a schematic diagram of the structure of the bent bolt described in an embodiment of this disclosure.

[0019] in: 1. First segment; 11. First groove; 12. First protrusion; 121. First parallel portion; 122. First vertical portion; 13. First waterproof groove; 14. First flat groove; 2, second segment; 21, second protrusion; 211, second parallel part; 212, second vertical part; 22, second sliding groove; 23, second waterproof groove; 24, second flat groove; 3, bent bolt; 4, bent hole; 41, hole end wall; 5, nut part; 6, weather strip; 7, first anchor; 8, second anchor; 9, gasket. DETAILED DESCRIPTION

[0020] In order to enable the above-mentioned purposes, features and advantages of the present disclosure to be more clearly understood, the schemes of the present disclosure will be further described below in conjunction with embodiments and drawings. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict. The illustrative embodiments of the present disclosure and the descriptions thereof are only used to explain the present disclosure and do not limit the present disclosure.

[0021] In the following description, many specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure can also be implemented in other different manners from those described herein; obviously, the embodiments in the description are only some embodiments of the present disclosure, rather than all the embodiments.

[0022] The connecting structure of the shield tunnel segment of the present embodiment is shown in Figures 1-5 , which comprises a first segment 1 and a second segment 2. The first segment 1 and the second segment 2 are semi-annular segments, and the first segment 1 and the second segment 2 are assembled to form a complete annular shield tunnel segment.

[0023] Specifically, as shown in Figure 2 , one end of the first segment 1 towards the second segment 2, that is, the end of the first segment 1 connected with the second segment 2, is provided with a first sliding groove 11 and a first protrusion 12 at intervals. The first sliding groove 11 and the first protrusion 12 are arranged in line and both extend towards the axial direction of the first segment 1. Correspondingly, as shown in Figure 2 and Figure 3 , one end of the second segment 2 towards the first segment 1 is provided with a second protrusion 21 and a second sliding groove 22 corresponding to the first sliding groove 11 and the first protrusion 12 for insertion and connection. Among them, the second protrusion 21 can be slidably inserted into the first sliding groove 11, and the first protrusion 12 can be slidably inserted into the second sliding groove 22, so that the first segment 1 and the second segment 2 can be quickly assembled.

[0024] Further, as shown in Figure 2As shown, both the first segment 1 and the second segment 2 have curved holes 4 for the bending bolts 3 to pass through. The curved holes 4 are arc-shaped. After the first segment 1 and the second segment 2 are assembled, the curved holes 4 on the first segment 1 and the curved holes 4 on the second segment 2 are aligned. Then, the bending bolts 3 are passed through the curved holes 4 on the first segment 1 and the second segment 2. Then, the nut 5 is screwed and locked to one end of the bending bolt 3 to fix the first segment 1 and the second segment 2.

[0025] The connection structure of this shield tunnel segment is simple in overall design and easy to assemble on site. By setting a first groove 11, a first protrusion 12, a second protrusion 21, and a second groove 22, the first segment 1 and the second segment 2 are joined in a concave-convex fit. This increases the area of ​​the pressure zone at the segment joint when bent, reducing the risk of localized cracking at the joint. This reduces the risk of the segment joint opening under external loads, leading to waterproofing failure and leakage at the joint. Furthermore, by setting bent bolts 3 and nuts 5, the locking action of the bent bolts 3 and nuts 5 further enhances the tightness of the connection between the first segment 1 and the second segment 2, further improving the compressive strength of the connection and reducing the likelihood of the joint opening under external loads.

[0026] For example, in this embodiment, the bent bolt 3 has a length of 900mm, a diameter of 25mm, and an arc radius of 340mm. One end is a fixing nut, and the other end is a threaded free end that can be screwed onto the nut component 5. Both the fixing nut and the nut component 5 are equilateral hexagons, with a height of 20mm, an inscribed circle diameter of 40mm, and a circumscribed circle diameter of 45mm.

[0027] Optionally, such as Figure 6 As shown, the connection structure of the shield tunnel segment in this embodiment also includes a washer 9. The washer 9 is sleeved on the bent bolt 3 and sandwiched between the nut 5 and the end wall 41 of the bent hole 4 to reduce wear between the nut 5 and the end wall 41. In addition, the washer 9 can also be sandwiched between the fixing nut and the end wall 41 of the bent hole 4, depending on the actual situation. The dimensions of the fixing nut, the nut 5 and the washer 9 can be adjusted accordingly according to the size change of the bent bolt 3. This embodiment will not list them all.

[0028] Furthermore, such as Figure 1As shown, the connecting structure of the shield tunnel segment of the embodiment further comprises a waterstop 6, which is clamped between the first segment 1 and the second segment 2 and is located at the joint seam of the first segment 1 and the second segment 2, so as to effectively prevent underground water from seeping along the joint seam. The waterstop 6 forms a reliable water-tight barrier, effectively preventing external underground water, moisture and impurities in the soil from seeping into the tunnel through the segment joint. Moreover, the waterstop 6 is made of elastic material and can be compressed or rebounded with the deformation of the joint, so as to maintain close contact with the concrete surface at all times and continuously play a sealing role to compensate for the displacement and deformation of the structure.

[0029] The waterstop 6 of the embodiment is a commonly used component in the field, which has good properties of aging resistance, wear resistance, chemical corrosion resistance (such as acid and alkali ions in underground water), etc., and can match the design service life of the concrete structure to provide long-term waterproof protection. The specific material of the waterstop 6 can refer to the prior art, and the embodiment will not be described in detail.

[0030] More specifically, as shown, Figure 2 the first segment 1 is provided with a first waterproof groove 13 at one end facing the second segment 2, and the second segment 2 is provided with a second waterproof groove 23 at one end facing the first segment 1. The grooves of the first waterproof groove 13 and the second waterproof groove 23 are opposite to each other to form a waterproof cavity for accommodating the waterstop 6, and the waterstop 6 is installed in the waterproof cavity formed by the assembly of the first waterproof groove 13 and the second waterproof groove 23. In the embodiment, the groove type of the first waterproof groove 13 and the second waterproof groove 23 is related to the shape of the waterstop 6. For example, the waterstop 6 of the embodiment is a long rectangular shape, and the groove type of the first waterproof groove 13 and the second waterproof groove 23 is also adaptively selected as a rectangle. In addition, the waterstop 6, the first waterproof groove 13 and the second waterproof groove 23 can also have other shapes, including but not limited to the shapes shown in the drawings of the embodiment.

[0031] Further, as shown, Figure 1 the connecting structure of the shield tunnel segment of the embodiment further comprises a first anchor 7, which is an anchor bar. The first anchor 7 is pre-buried in the first segment 1, one end of the first anchor 7 is connected with the first lug 12, so as to fix the first lug 12 on the first segment 1 and improve the connection reliability of the first lug 12 and the first segment 1.

[0032] Similarly, as shown, Figure 1 the connecting structure of the shield tunnel segment of the embodiment can further comprise a second anchor 8, which is also an anchor bar. The second anchor 8 is pre-buried in the second segment 2, one end of the second anchor 8 is connected with the second lug 21, so as to fix the second lug 21 on the second segment 2 and improve the connection reliability of the second lug 21 and the second segment 2.

[0033] For example, asFigure 2 As shown in the drawings, the first pipe piece 1 of the embodiment is provided with a first flat groove 14 at one end thereof facing the second pipe piece 2, and the second pipe piece 2 is provided with a second flat groove 24 at one end thereof facing the first pipe piece 1. One end of the first protrusion 12 is fixedly connected with the first flat groove 14, and the other end is slidably connected with the second sliding groove 22. One end of the second protrusion 21 is fixedly connected with the second flat groove 24, and the other end is slidably connected with the first sliding groove 11. The first flat groove 14 and the second flat groove 24 are respectively used to provide installation positions for the first protrusion 12 and the second protrusion 21.

[0034] More specifically, as shown in the drawings, the first sliding groove 11 and the second sliding groove 22 of the embodiment are both T-shaped grooves. Figure 2

[0035] The first protrusion 12 includes two first parallel portions 121 arranged in parallel, and a first vertical portion 122 perpendicular to the two first parallel portions 121, and the first protrusion 12 has an overall I-shaped structure. One of the first parallel portions 121 is fixedly connected with the first flat groove 14, and the first vertical portion 122 and the other first parallel portion 121 are arranged perpendicularly to form a T shape, which can be slidably connected with the T-shaped second sliding groove 22.

[0036] Correspondingly, the second protrusion 21 also includes two second parallel portions 211 arranged in parallel, and a second vertical portion 212 perpendicular to the two second parallel portions 211, and the second protrusion 21 also has an overall I-shaped structure. One of the second parallel portions 211 is fixedly connected with the second flat groove 24, and the second vertical portion 212 and the other second parallel portion 211 are arranged perpendicularly to form a T shape, which can be slidably connected with the T-shaped first sliding groove 11.

[0037] The first sliding groove 11 and the second sliding groove 22 of the embodiment are both T-shaped grooves, which can effectively improve the connection reliability of the first protrusion 12 with the second sliding groove 22 and the second protrusion 21 with the first sliding groove 11. In addition, the first sliding groove 11 and the second sliding groove 22 can also be designed in other groove shapes, including but not limited to the T shape shown in the drawings of the embodiment, which can be selected according to actual needs.

[0038] The preparation method of the connection structure of the shield tunnel pipe piece of the embodiment can be referred to as follows: (The preparation method of the first pipe piece 1 of the embodiment is the same as that of the second pipe piece 2, and the preparation method of the first pipe piece 1 is taken as an example) Step S1, first, uniformly arrange the transverse steel bars and the longitudinal steel bars in the pipe piece mold to ensure the structural strength of the first pipe piece 1 after pouring; Step S2, reserve the positions of the first waterproof groove 13, the first protrusion 12 and the first sliding groove 11 at the joint end of the first pipe piece 1, and set a plurality of first anchor members 7 at the reserved position of the first protrusion 12; ​Step S3: Reserve the position of the bend 4 at the joint end of the first segment 1; Step S4: Pour concrete into the segment mold to form the first segment 1.

[0039] In addition, other methods may be used to prepare the first tube segment 1 and the second tube segment 2, including but not limited to the methods described above in this embodiment.

[0040] The assembly method for the connection structure of the shield tunnel segments in this embodiment can be referred to as follows: When using it, first place the waterstop strip 6 in the first waterproof groove 13 or the second waterproof groove 23; Secondly, the first and second segments were hoisted into place using a tunnel segment assembly machine. Then, by sliding in, such as Figure 3 As shown, the first protrusion 12 slides into the second groove 22, and the second protrusion 21 slides into the first groove 11, thereby realizing the assembly of the first tube segment 1 and the second tube segment 2. Finally, after the first segment 1 and the second segment 2 are assembled, insert the bent bolt 3 into the bent hole 4, and then tighten the nut 5 to complete the installation.

[0041] In summary, the connection structure of the shield tunnel segments in this embodiment can effectively solve the problems of insufficient stiffness and insufficient resistance to bending moment at the connection points during the assembly of shield tunnel segments. It can improve the connection strength at the tunnel segment joints, increase the bearing capacity at the connection points of adjacent segments, improve the shear strength of the connection points, prevent the connection points from loosening or falling off, effectively resist various loads suffered by the segments during tunnel construction and operation, ensure the balance of forces on both sides of the combined joint, prevent stress concentration, and avoid affecting the service life of the segment body.

[0042] It should be noted that in this article, relational terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0043] Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0044] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0045] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement this disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure.

[0046] Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A connection structure of a shield tunnel segment, characterized by, The utility model relates to a kind of waterproofing of first and second pipe pieces, including: First pipe piece (1) and second pipe piece (2), one end of the first pipe piece (1) towards the second pipe piece (2) is provided with first sliding groove (11) and first lug (12) with interval, first sliding groove (11) and first lug (12) are arranged in line and extend towards the axial direction of the first pipe piece (1);One end of the second pipe piece (2) towards the first pipe piece (1) is provided with second lug (21) and second sliding groove (22) corresponding with the first sliding groove (11) and first lug (12) plug-in connection; The first pipe piece (1) and the second pipe piece (2) are provided with bent hole (4) for bent bolt (3) to pass through, the bent bolt (3) is arranged in the first pipe piece (1), the second pipe piece (2) and is connected with nut piece (5), to fix the first pipe piece (1) and the second pipe piece (2).

2. The connection structure of a shield tunnel segment according to claim 1, wherein It also includes a water stop (6), the water stop (6) is clamped between the first pipe piece (1) and the second pipe piece (2).

3. The connection structure of the shield tunnel segment according to claim 2, wherein, The first pipe piece (1) is provided with first waterproof groove (13) towards one end of the second pipe piece (2), and the second pipe piece (2) is provided with second waterproof groove (23) towards one end of the first pipe piece (1), and the first waterproof groove (13) and the second waterproof groove (23) are opposite to form a waterproof cavity for containing the water stop (6).

4. The connection structure of a shield tunnel segment according to claim 1, wherein It also includes a first anchor (7), the first anchor (7) is embedded in the first pipe piece (1), and one end of the first anchor (7) is connected with the first lug (12).

5. The connection structure of a shield tunnel segment according to claim 1, wherein It also includes a second anchor (8), the second anchor (8) is embedded in the second pipe piece (2), and one end of the second anchor (8) is connected with the second lug (21).

6. The connection structure of a shield tunnel segment according to claim 1, wherein The first pipe piece (1) is provided with first flat groove (14) towards one end of the second pipe piece (2), one end of the first lug (12) is fixedly connected with the first flat groove (14), and the other end is slidably connected with the second sliding groove (22).

7. The connection structure of a shield tunnel segment according to claim 1, wherein The second pipe piece (2) is provided with second flat groove (24) towards one end of the first pipe piece (1), one end of the second lug (21) is fixedly connected with the second flat groove (24), and the other end is slidably connected with the first sliding groove (11).

8. The connection structure of the shield tunnel segment according to claim 6, wherein, The second sliding groove (22) is T-shaped groove, the first lug (12) includes two first parallel parts (121) arranged in parallel, and first vertical part (122) perpendicular to two first parallel parts (121);One of the first parallel parts (121) is fixedly connected with the first flat groove (14), and the first vertical part (122) and the other first parallel part (121) are slidably connected with the second sliding groove (22).

9. The connection structure of the shield tunnel segment according to claim 7, wherein, The first sliding groove (11) is a T-shaped groove, the second protrusion (21) comprises two second parallel parts (211) arranged in parallel, and a second vertical part (212) perpendicular to the two second parallel parts (211); one of the second parallel parts (211) is fixedly connected with the second sliding groove (24), and the second vertical part (212) and the other second parallel part (211) are slidingly inserted with the first sliding groove (11).

10. The connection structure of the shield tunnel segment according to any one of claims 1-9, characterized in that, A gasket (9) is further included, which is sleeved on the bent bolt (3) and clamped between the nut member (5) and a hole end wall (41) of the bent hole (4).

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