Subway shield segment convenient to assemble

Abstract

The utility model relates to the technical field of metro segments, in particular to a metro shield segment convenient to assemble, which comprises a segment I and two segments II, the segment I is axially inserted between the two segments II, two inserting surfaces I are formed on the segment I, and inserting surfaces II matched with the inserting surfaces I are formed on the segments II. An elastic fastener is arranged on the first inserting face of the first pipe piece, and a buckling groove matched with the elastic fastener is formed in the second inserting face of the second pipe piece. When the first pipe piece is axially inserted between the two second pipe pieces, the elastic fasteners on the first inserting face are squeezed to store force, and when the elastic fasteners move to be opposite to the buckling grooves, the elastic fasteners rebound and abut against the buckling grooves. According to the subway shield segment, the elastic fasteners are arranged on the inserting faces of the K-type segment and the B-type segment, so that inserting installation is convenient, the connecting tightness can be improved, relative dislocation displacement between the segments is reduced, namely errors at the splicing position are reduced, and therefore the use stability of the segment is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of subway tunnel segment technology, and in particular to a subway shield tunnel segment that is easy to assemble. Background Technology

[0002] A subway is a form of rail transport, referring to an urban rail transit system that primarily operates underground. Many such systems, to accommodate the construction environment and consider construction and operating costs, may transition to surface or elevated sections outside of city centers. In subway construction, a typical subway tunnel unit consists of six tunnel segments, also known as shield tunnel segments. These segments form the innermost barrier of the tunnel, resisting soil pressure, groundwater pressure, and other special loads. Shield tunnel segments are the permanent lining structure of shield-tunneling systems, and their quality directly affects the overall quality and safety of the tunnel, influencing its waterproofing and durability.

[0003] A tunnel segment ring (referring to a ring of subway tunnel segments) typically consists of six segments: a standard block (Type A segment), adjacent blocks (Type B segments), and a capping block (Type K segment), connected by bolts. Segment assembly is one of the most important processes in tunnel construction; the quality of the assembly directly affects the overall project quality. The segment assembly sequence is usually "bottom to top," starting with Type A segments (standard blocks), then Type B segments (adjacent blocks), and finally Type K segments (capping blocks). Type K segments are typically assembled between two Type B segments using an axial insertion method. This method is not only not secure enough and prone to displacement, but also fails to guarantee tightness. Therefore, there is an urgent need for a segment connection structure that is easy to assemble and provides good tightness. Utility Model Content

[0004] To address the issues of large gaps and insufficient connection tightness during the assembly of existing K-type tunnel segments, this invention provides a subway shield tunnel segment that is easy to assemble. By setting elastic fasteners on the interlocking surfaces of K-type and B-type tunnel segments, not only is installation and interlocking convenient, but the connection tightness is also improved, reducing the relative misalignment between tunnel segments, i.e., reducing the error at the splicing point, thereby ensuring the stability of the tunnel segment in use.

[0005] This utility model provides a subway tunnel segment that is easy to assemble, including segment one and two segments two. Segment one is axially inserted between the two segments two. Segment one has two insertion surfaces one, and segment two has insertion surfaces two that mate with the insertion surfaces one. Elastic fasteners are provided on the insertion surfaces one of segment one, and fastening grooves adapted to the elastic fasteners are provided on the insertion surfaces two of segment two. When segment one is axially inserted between the two segments two, the elastic fasteners on the insertion surfaces one are compressed and stored. When the elastic fasteners move to align with the fastening grooves, they spring back and abut into the grooves. The interaction of the elastic fasteners and the fastening grooves connects adjacent segments, reducing displacement, minimizing gaps, and ensuring a tight connection.

[0006] Furthermore, a mounting groove for accommodating the elastic fastener is provided on the first insertion surface, and the mounting groove is located on the central axis of the first insertion surface. Placing the mounting groove on the central axis ensures connection stability without affecting the support strength of the tunnel segment.

[0007] Furthermore, the elastic fastener includes a fastener plate, a spring, and a pivot. The fastener plate has a front end and a rear end along the axial insertion direction. The front end of the fastener plate is rotatably mounted in the mounting groove via the pivot, and the rear end of the fastener plate is fixedly connected to the mounting groove via the spring. Under the action of the spring, the fastener plate rotates around the pivot and presses into the mounting groove or abuts into the fastener slot.

[0008] Furthermore, a positioning post for installing the spring is provided in the mounting slot. The bottom of the spring is fitted onto the positioning post, and a positioning groove is opened on the bottom surface of the buckle plate to accommodate the spring. The top of the spring abuts into the positioning groove. The positioning post and positioning groove achieve stable installation of the spring.

[0009] Furthermore, two rotating shafts are arranged in parallel within the mounting groove, each shaft rotatably connected to two snap plates. A positioning block is positioned between the two snap plates, allowing the rotating shafts to pass through. The positioning block is fixedly positioned on the central axis of the mounting groove. The connection is enhanced by using four snap plates, front and rear, to improve connection stability.

[0010] Furthermore, the groove is evenly spaced with reverse teeth, which are positioned along the axial insertion direction, and the rear end of the buckle plate can abut against the reverse teeth. The cooperation between the reverse teeth and the buckle plate further improves the connection stability and prevents relative misalignment.

[0011] Furthermore, the elastic fastener and the fastening groove constitute an elastic positioning unit. Two sets of elastic positioning units are provided between the first insertion surface and the second insertion surface, and the two sets of elastic positioning units are evenly distributed on the insertion surface. Stable connection between the segments is achieved through the two sets of elastic positioning units provided on the insertion surface.

[0012] Furthermore, the reverse teeth within the slots of the two sets of elastic positioning units are staggered. When the buckle plate of one set of elastic positioning units abuts against the reverse teeth, the buckle plate of the other set of elastic positioning units is positioned between adjacent reverse teeth. This staggered arrangement of the two sets of reverse teeth can further reduce the displacement at the splice, reducing the displacement of the distance between the two reverse teeth to half of the distance between the two reverse teeth.

[0013] Furthermore, at least one set of sensing components is provided between the first and second insertion surfaces. The sensing components include a main sensor and a secondary sensor used in conjunction, with the main sensor and secondary sensor respectively disposed on the first and second insertion surfaces. The sensing components can detect whether misalignment exists during assembly.

[0014] Both the first and second plug-in surfaces have mounting holes for placing the sensing component. The sensing component, when inserted into the mounting hole, is flush with the hole and connects wirelessly to the terminal device. The external terminal can monitor the misalignment in real time; a misalignment within half the distance between the two teeth is considered normal.

[0015] Furthermore, the retaining groove has grooves on both sides of its axial insertion direction, and the mounting groove corresponding to the retaining groove has protrusions on both sides of its axial insertion direction that match the grooves. The cooperation of the corresponding grooves and protrusions on the retaining groove and mounting groove effectively prevents misalignment during insertion.

[0016] The beneficial effects of this utility model are as follows:

[0017] This utility model provides a subway tunnel segment that is easy to assemble. By setting elastic fasteners and fastening grooves on the insertion surface of adjacent segments, the segment can be installed in place during axial insertion, and the fastening stability is good. Because the segment is large, the reverse teeth that match the elastic fasteners are also large. Under the premise of ensuring the minimum displacement of the segment, two sets of staggered reverse teeth are set in front and behind, which can reduce the displacement of the distance between the two reverse teeth to half of the distance between the two reverse teeth, thereby further reducing the relative displacement and improving the connection tightness of adjacent segments. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are 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 schematic diagram of the segment ring structure;

[0020] Figure 2 This is a structural schematic diagram of the first insertion surface;

[0021] Figure 3 This is a schematic diagram of the structure of the second insertion surface;

[0022] Figure 4 This is a schematic diagram of the mating of plug surface one and plug surface two;

[0023] In the diagram: 1. Segment 1, 11. Insertion Surface 1, 12. Mounting Groove, 2. Segment 2, 21. Insertion Surface 2, 3. Elastic Fastener, 31. Fastener Plate, 32. Spring, 33. Rotating Shaft, 34. Positioning Post, 35. Positioning Groove, 36. 4. Fastener Groove, 41. Backtooth, 5. Main Sensor, 6. Sub-Sensor. Detailed Implementation

[0024] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0025] To facilitate the installation of adjacent tunnel segments and ensure the stability of segment connections, a subway tunnel segment that is easy to assemble is designed, such as... Figure 1 As shown, the tunnel includes segment 1 and two segments 2. Segment 1 is axially inserted between the two segments 2. Segment 1 has two insertion surfaces 11, and segment 2 has insertion surfaces 21 that mate with the insertion surfaces 11. Segment assembly is one of the important processes in tunnel construction. After the segments are assembled, the tunnel is formed, and the quality of the assembly directly affects the quality of the project. The segment assembly sequence is usually "bottom to top": first type A segments, then type B segments (i.e., segment 2), and finally type K segments (i.e., segment 1). Segment 1 is inserted axially between the two segments 2 from the tunnel excavation face towards the shaft, completing the assembly of the segment ring.

[0026] The core of this technical solution lies in the fact that an elastic fastener 3 is provided on the insertion surface 11 of segment 1, and a fastening groove 4 adapted to the elastic fastener 3 is provided on the insertion surface 21 of segment 2. When segment 1 is axially inserted between two segments 2, the elastic fastener 3 on the insertion surface 11 is compressed and stores force. When the elastic fastener 3 moves to be opposite to the fastening groove 4, the elastic fastener 3 rebounds and abuts into the fastening groove 4. During the axial insertion of segment 1, the elastic fastener 3 is compressed by the insertion surface 21 until it is inserted into place, that is, when the elastic fastener 3 moves to be opposite to the fastening groove 4, the compressed elastic fastener 3 recovers and abuts into the fastening groove 4, realizing the fastening of two adjacent segments with high holding force and good connection stability.

[0027] In order to ensure connection stability without affecting the support strength of the pipe segment, the insertion surface 11 is provided with an installation groove 12 that can accommodate the elastic fastener 3. The installation groove 12 is located on the central axis of the insertion surface 11.

[0028] like Figure 2 As shown, preferably, the elastic fastener 3 includes a fastener plate 31, a spring 32, and a rotating shaft 33. The fastener plate 31 is divided into a front end and a rear end along the axial insertion direction. The front end of the fastener plate 31 is rotatably mounted in the mounting groove 12 via the rotating shaft 33, and the rear end of the fastener plate 31 is fixedly connected to the mounting groove 12 via the spring 32. The rear end of the fastener plate 31 rotates under the action of the spring 32 and engages with the fastener groove 4 to achieve a stable connection between the first segment 1 and the second segment 2.

[0029] To ensure stable installation and guidance of the spring 32, a positioning post 34 for installing the spring 32 is provided in the mounting groove 12. The bottom of the spring 32 is fitted onto the positioning post 34, and a positioning groove 35 for accommodating the spring 32 is provided on the bottom surface of the buckle plate 31. The top of the spring 32 abuts into the positioning groove 35. The upper end of the spring 32 is fixedly set in the positioning groove 35, and the lower end of the spring 32 is fixedly fitted onto the positioning post 34. When the buckle plate 31 is pressed by the insertion surface 21, that is, when the spring 32 is compressed, the spring 32 can be compressed along the positioning post 34 and the positioning groove 35, avoiding displacement during compression or rebound, thus ensuring good stability.

[0030] To improve the stability of the fastening connection, two rotating shafts 33 are arranged in parallel within the mounting groove 12. Each rotating shaft 33 is rotatably connected to two fastening plates 31. A positioning block 36 is provided between the two fastening plates 31, through which the rotating shafts 33 can pass. The positioning block 36 is fixedly positioned on the central axis of the mounting groove 12. The outer edges of the two fastening plates 31 correspond to the two sides of the fastening groove 4. Through the cooperation of the fastening groove 4 and the multiple fastening plates 31, a stable connection between segment 1 and segment 2 is achieved.

[0031] like Figure 3 As shown, to further improve the stability of the fastening connection, inverted teeth 41 are evenly arranged in the fastening groove 4. The inverted teeth 41 are arranged along the axial insertion direction, and the rear end of the fastening plate 31 can abut against the inverted teeth 41. The setting of the inverted teeth 41 can increase the connection stability with the fastening plate 31 on the one hand, and effectively prevent the tube segment 1 from coming out of the two tube segments 2 in the insertion direction on the other hand.

[0032] like Figure 4As shown, to further reduce the relative displacement between segments and ensure the assembly accuracy of the segments, the elastic fastener 3 and the fastening groove 4 constitute an elastic positioning unit. Two sets of elastic positioning units are provided between the first insertion surface 11 and the second insertion surface 21, and the two sets of elastic positioning units are evenly arranged on the insertion surface. The reverse teeth 41 in the fastening groove 4 of the two sets of elastic positioning units are staggered. When the fastening plate 31 of one set of elastic positioning units abuts against the reverse teeth 41, the fastening plate 31 of the other set of elastic positioning units is placed between the adjacent reverse teeth 41. The shield tunnel segments are relatively large, so the spacing of the inverted teeth 41 set on the second insertion surface 21 is also relatively large. This causes the buckle plate 31 to move between adjacent inverted teeth 41, resulting in deviations in the assembly accuracy of the tunnel segments. By setting two sets of staggered inverted tooth 41 structures, the accuracy error of the spacing of one inverted tooth 41 can be reduced to half of the spacing of the inverted tooth 41. That is, when the buckle plate 31 of one set of elastic positioning units abuts against the inverted tooth 41, the buckle plate 31 of the other elastic positioning unit is exactly placed between two adjacent inverted teeth 41. If displacement occurs, it can only move by half the distance of the inverted tooth 41 spacing, effectively reducing the misalignment value and ensuring the assembly accuracy of the tunnel segments.

[0033] To detect the relative displacement of the tunnel segments, at least one set of sensing components is installed between the first insertion surface 11 and the second insertion surface 21. The sensing components include a main sensor 5 and a secondary sensor 6 used in conjunction, respectively mounted on the first insertion surface 11 and the secondary insertion surface 21. When the main sensor 5 and the secondary sensor 6 contact, the insertion assembly is complete. Both the first insertion surface 11 and the second insertion surface 21 have mounting holes for placing the sensing components. The sensing components are flush with the mounting holes and are wirelessly connected to the terminal device. To ensure detection accuracy, three sets of sensing components can be correspondingly installed on the insertion surfaces. The displacement deviation is set to half the spacing of the counter-tooth 41. When this value is exceeded, the sensor sends information to the terminal device for timely maintenance of the tunnel segments.

[0034] To prevent misalignment of segment 1 and segment 2 during insertion, grooves are provided on both sides of the retaining groove 4 along the axial insertion direction. Correspondingly, the mounting groove 12 has protrusions on both sides of its axial insertion direction that match the grooves. The groove depth is 4mm, and the protrusion height is 3mm. Due to the large size of the segments, the 3mm protrusion will not affect the insertion between the segments. When the protrusion abuts into the groove, segment 1 and segment 2 are properly inserted.

[0035] The above description is illustrative only and not restrictive of this utility model. Those skilled in the art will understand that many modifications, variations or equivalents can be made without departing from the spirit and scope defined by the appended claims, and all such modifications, variations or equivalents will fall within the protection scope of this utility model.

Claims

1. A subway tunnel segment that is easy to assemble, comprising a first segment (1) and two second segments (2), wherein the first segment (1) is axially inserted between the two second segments (2), the first segment (1) having two insertion surfaces (11), and the second segment (2) having an insertion surface (21) that mates with the insertion surfaces (11), characterized in that: The insertion surface (11) of the first segment (1) is provided with an elastic fastener (3), and the insertion surface (21) of the second segment (2) is provided with a fastening groove (4) that is compatible with the elastic fastener (3). When the first segment (1) is axially inserted between the two second segments (2), the elastic fastener (3) on the insertion surface (11) is squeezed and stored. When the elastic fastener (3) moves to be opposite to the fastening groove (4), the elastic fastener (3) rebounds and abuts into the fastening groove (4).

2. The metro shield segment of claim 1, wherein: The first insertion surface (11) is provided with an installation groove (12) that can accommodate the elastic fastener (3), and the installation groove (12) is located on the central axis of the first insertion surface (11).

3. The metro shield segment that facilitates assembly according to claim 2, wherein: The elastic fastener (3) includes a buckle plate (31), a spring (32) and a rotating shaft (33). The buckle plate (31) is divided into a front end and a rear end along the axial insertion direction. The front end of the buckle plate (31) is rotatably set in the mounting groove (12) through the rotating shaft (33). The rear end of the buckle plate (31) is fixedly connected to the mounting groove (12) through the spring (32).

4. The metro shield segment of claim 3, wherein: The mounting groove (12) is provided with a positioning post (34) for installing the spring (32). The bottom of the spring (32) is fitted onto the positioning post (34). The bottom surface of the buckle plate (31) is provided with a positioning groove (35) that can accommodate the spring (32). The top of the spring (32) abuts into the positioning groove (35).

5. The metro shield segment of claim 3, wherein: Two rotating shafts (33) are arranged in parallel inside the mounting groove (12). Two buckles (31) are rotatably connected to each rotating shaft (33). A positioning block (36) is provided between the two buckles (31) so that the rotating shaft (33) can pass through. The positioning block (36) is fixedly set on the central axis of the mounting groove (12).

6. The metro shield segment that facilitates assembly according to claim 3, wherein: The groove (4) is evenly arranged with inverted teeth (41), which are arranged along the axial insertion direction. The rear end of the buckle plate (31) can abut against the inverted teeth (41).

7. The metro shield segment of claim 6, wherein: The elastic fastener (3) and the fastener groove (4) constitute an elastic positioning unit. Two sets of elastic positioning units are provided between the first insertion surface (11) and the second insertion surface (21). The two sets of elastic positioning units are evenly arranged on the insertion surface.

8. The metro shield segment of claim 7, wherein: The reverse teeth (41) in the grooves (4) of the two sets of elastic positioning units are staggered. When the buckle plate (31) of one set of elastic positioning units abuts against the reverse teeth (41), the buckle plate (31) of the other set of elastic positioning units is placed between the adjacent reverse teeth (41).

9. The metro shield segment that facilitates assembly of claim 1, wherein: At least one set of sensing components is provided between the first plug-in surface (11) and the second plug-in surface (21). The sensing components include a main sensor (5) and a secondary sensor (6) used in cooperation. The main sensor (5) and the secondary sensor (6) are respectively disposed on the first plug-in surface (11) and the second plug-in surface (21). Both the first (11) and the second (21) of the plug-in surface are provided with mounting holes for placing the sensing components. The sensing components are flush with the mounting holes and are wirelessly connected to the terminal device.

10. The metro shield segment that facilitates assembly according to claim 2, wherein: The recess groove (4) is provided with a recess on the two side walls along the axial insertion direction, and the mounting groove (12) corresponding to the recess groove (4) is provided with a protrusion matched with the recess on the two side walls along the axial insertion direction.

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