Top sealing block and shield segment ring group

Abstract

The utility model discloses a top sealing block and a shield segment ring group. The technical problems that an existing top sealing block and shield segment ring group is low in assembling efficiency and weak in structural strength are solved. The top sealing block is used for being assembled between adjacent adjacent blocks, the top sealing block comprises a top sealing block body, a through type mounting hole is formed in the inner adjacent face, penetrating through the left side and the right side of the top sealing block body, of a top sealing block ring, and the through type mounting hole is used for allowing a connecting piece between the adjacent adjacent blocks to penetrate through. According to the top sealing block, the sub-angle of the top sealing block can be designed to be small enough, the adjacent blocks on the two sides can be connected through the through type mounting hole, meanwhile, too many mounting holes do not need to be formed in the top sealing block, mounting hand holes do not need to be formed in the top sealing block body, and the top sealing block has the beneficial effects of being high in assembling efficiency and high in structural strength.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe segments, in particular to a capping block and a shield pipe segment ring group. Background Art

[0002] With the development of urban construction, shield construction technology is also developing towards small cross-sections. The cross-sections of underground projects such as urban underground pipeline systems, integrated pipeline corridors, and connecting passages are smaller than the tunnel structure cross-sections of conventional subway projects. The structure of conventional shield segments is not applicable in the construction process of small and micro shields, and shield segments suitable for small cross-section design are required.

[0003] For example, the utility model patent with the authorization announcement number CN216198164U discloses a shield tunnel connecting channel segment, and proposes a block division method in which the capping blocks, adjacent blocks, standard blocks and other blocks in the shield tunnel segment ring group are evenly distributed at equal angles; another example is the utility model patent with the authorization announcement number CN218467617U, which discloses a shield tunnel connecting channel segment structure, and proposes a block division method in which the center angles of the capping blocks, adjacent blocks and standard blocks in the shield tunnel segment ring group are set to 60°, 78° and 72° respectively, and the segments are connected by bolts. Compared with conventional shield tunnels, the capping blocks have larger block division angles, which makes them difficult to assemble, and the capping blocks will be subject to greater water and soil pressure, making them more likely to be misaligned with other segments; Another example is the invention patent with the authorization announcement number CN104763441B, which discloses a longitudinal seam joint of a shield tunnel segment and proposes a longitudinal seam structure of the segment that protrudes inward to improve the bending strength of the segment joint. However, the protruding part occupies the internal space of the tunnel. Another example is the utility model patent with the authorization announcement number CN206722842U, which discloses a shield tunnel lining ring suitable for subway-type urban express rail. It adopts a block form with a capping block with a central angle of 10°, an adjacent block with a central angle of 55°, and a standard block with a central angle of 60°. The capping block is not provided with longitudinal bolts, but is provided with bolt hand holes connected to the adjacent blocks. It is suitable for large-diameter shield tunnels. The provision of bolt hand holes in small-diameter shield tunnels will reduce the strength of the component.

[0004] Since the block structure in the shield segment ring group affects the efficiency of shield tunnel construction, and when the segments are connected by bolts, the setting of bolt hand holes will also affect the strength of the lining segments, which is more obvious in small-section shield tunnels. Because the wall thickness of small shield tunnels is thinner and the segment size is smaller, the setting of bolt hand holes will weaken the segment, and the impact is more serious when using smaller capping blocks.

[0005] Therefore, it is necessary to design a capping block and shield segment ring group that is easy to assemble and has high structural strength.

[0006] It should be particularly noted that the above technical information is only intended to deepen the understanding of the overall background technology of the present utility model, and should not be regarded as admitting or implying in any form that the above technical information constitutes the prior art already known to those skilled in the art. Utility Model Content

[0007] In view of the deficiencies in the above-mentioned background technology, the utility model proposes a capping block and a shield segment ring assembly, which solves the technical problems of low assembly efficiency and weak structural strength of the existing capping blocks and shield segment ring assemblies.

[0008] The technical solution of this application is:

[0009] A capping block is used for being assembled between adjacent adjacent blocks, comprising a capping block body, and adjacent surfaces of the capping block ring on the left and right sides of the capping block body are provided with through-type mounting holes, and the through-type mounting holes are used to insert connecting pieces between the adjacent adjacent blocks, so that the dividing angle of the capping block can be designed to be small enough, and the adjacent blocks on both sides can be connected through a through-type mounting hole. At the same time, there is no need to set too many mounting holes on the capping block, and there is no need to set mounting hand holes on the capping block body, but it has the beneficial effects of high assembly efficiency and high structural strength.

[0010] On the basis of the above technical solution, as a preferred technical solution of the capping block, the through-type mounting hole is a through-type bolt mounting hole of the capping block or a through-type anchor bolt mounting hole of the capping block or a through-type cable mounting hole of the capping block. That is, the through-type mounting hole has multiple implementation modes, and different implementation modes can be equipped with multiple different connecting parts. When the through-type bolt mounting hole of the capping block is adopted, it can be used for the installation of tension bolts; when the through-type anchor bolt mounting hole of the capping block is adopted, it can be used for the installation of ordinary anchor bolts and tension anchor bolts; when the through-type cable mounting hole of the capping block is adopted, it can be used for the installation of tension anchor cables. Of course, when the shapes and sizes of tension bolts, ordinary anchor bolts, tension anchor bolts, and tension anchor cables are not much different, there is no need to set various through-type mounting holes respectively, that is, one through-type mounting hole can be used to respectively realize the installation of multiple connecting parts. In addition, it is preferred that the through-type mounting hole is set as an arc hole extending along an arc line, so as to adapt to the corresponding adjacent block, that is, to facilitate the assembly of the corresponding connecting parts and enhance the reliability of the connection structure.

[0011] On the basis of the above technical solution, as a preferred technical solution for the capping block, a front tenon of the capping block is provided on the front end face of the capping block shield of the capping block body, and the front tenon of the capping block is used to plug in the adjacent blocks or standard blocks of the adjacent shield segment ring group, which can effectively improve the connection accuracy and connection strength of the annular seam, and can also enhance the connection accuracy and connection strength of the longitudinal seam, but the flexibility of assembly is slightly reduced.

[0012] On the basis of the above technical solution, as a preferred technical solution for the capping block, a capping block rear tenon is provided on the rear end face of the capping block shield of the capping block body, and the capping block rear tenon is used to plug in the adjacent blocks or standard blocks of the adjacent shield segment ring group, thereby further improving the connection accuracy and connection strength of the annular seam, and also further enhancing the connection accuracy and connection strength of the longitudinal seam.

[0013] As another preferred technical solution of the capping block, positioning grooves are provided on the front end faces of the capping block shield and / or the rear end faces of the capping block shield at both ends of the capping block body, and the positioning grooves are used to sleeve adjacent blocks or standard blocks of adjacent shield segment ring groups. This is the opposite of the positioning method of the annular seam assembly in the above technical solution, and can also further improve the connection accuracy and connection strength of the annular seam and the longitudinal seam.

[0014] On the basis of the above technical scheme, as a preferred technical scheme of the capping block, the cross-section of the capping block body in the circumferential direction is a fan ring, and when the capping block is assembled, it can form a standard circular cavity with the adjacent block and the standard block to avoid occupying the limited internal space. The cross-section of the capping block body in the axial direction is a wedge-shaped, and the large end of the capping block body faces the excavation direction during assembly, which is convenient for axial insertion of the adjacent block during assembly, and has a tendency to tighten when the pipe joint provides a supporting reaction force for the excavator. Preferably, the inner arc surface of the capping block body is provided with a capping block hoisting hole, which is convenient for lifting and assembly. It should be noted that, in addition to the structural form defined by the present technical scheme, in the above technical scheme that does not define the cross-sectional shape of the capping block body in the circumferential direction, the capping block body can adopt various structural forms, such as a rectangular, trapezoidal, other polygonal, etc. cross-section in the circumferential direction, as long as it can ensure that the adjacent surface inside the capping block ring and the adjacent block are reliably fitted in the circumferential direction. Similarly, the cross-section of the capping block body in the axial direction is wedge-shaped, which is a preferred embodiment. In addition, the cross-section of the capping block body in the axial direction may also adopt other shapes, such as rectangle, other polygons, etc.

[0015] On the basis of the above technical solution, as a preferred technical solution for the capping block, the axes of the front tenon of the capping block and the rear tenon of the capping block are both located on the central axis plane of the capping block body.

[0016] On the basis of the above technical solutions, as a preferred technical solution for the capping block, the orthographic projection area of ​​the outer arc surface of the capping block body is greater than, equal to, or less than the orthographic projection area of ​​the inner arc surface of the capping block body, and the capping block defined by the above three size relationships is suitable for different assembly methods. Among them, for the solution in which the orthographic projection area of ​​the outer arc surface of the capping block body is greater than the orthographic projection area of ​​the inner arc surface of the capping block body, after the capping block, adjacent blocks, and standard blocks are assembled into a shield segment ring group, radial displacement of each segment can be prevented.

[0017] A shield segment ring group includes a capping block, an adjacent block and a standard block. The capping block is the capping block described in any one of the above technical solutions.

[0018] On the basis of the above technical solution, as a preferred technical solution for the shield segment ring group, the end face of the adjacent block close to the capping block is recorded as the second inner side surface of the adjacent block ring, an annular mounting hole connected with the through-type mounting hole is arranged between the second inner side surface of the adjacent block ring and the inner arc surface of the adjacent block, and an annular mounting hand hole matching the annular mounting hole is arranged on the inner arc surface of the adjacent block.

[0019] On the basis of the above technical solution, as a preferred technical solution for the shield segment ring group, when the front tenon of the capping block and / or the rear tenon of the capping block are provided on the capping block body, the front end face of the adjacent block shield and / or the rear end face of the adjacent block shield and / or the front end face of the standard block shield and / or the rear end face of the standard block shield are provided with grooves matching the front tenon of the capping block or the rear tenon of the capping block.

[0020] On the basis of the above technical solution, as another preferred technical solution for the shield segment ring group, when the positioning groove is provided on the capping block body, the adjacent block shield front end face and / or the adjacent block shield rear end face and / or the standard block shield front end face and / or the standard block shield rear end face are provided with positioning tenons matching the positioning groove.

[0021] Compared with the prior art, the capping block and shield segment ring assembly provided by the utility model have the following beneficial effects:

[0022] 1) It is not only suitable for large-diameter shield tunnels, but also for small-diameter shield tunnels, where the capping block has a smaller segmentation angle, making it easier to transport and assemble in a limited space.

[0023] 2) It is not only suitable for large-diameter shield tunnels, but also for small-diameter shield tunnels, where the capping block has fewer bolt holes and has high structural strength.

[0024] 3) The bolt installation process between the capping block and the adjacent blocks is reduced, which improves the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Attached Figure 1 Layout of prefabricated tenoned lining rings for shield tunnels;

[0027] Attached Figure 2 This is the overall schematic diagram of the shield tunnel lining ring with tenon;

[0028] Attached Figure 3 This is a schematic diagram of the shield tunnel lining ring capping block with tenon;

[0029] Attached Figure 4 Schematic diagram of the adjacent blocks of the shield tunnel lining ring with tenon;

[0030] Attached Figure 5 It is a schematic diagram of the bolt connection between the tenon lining ring capping block and the adjacent block;

[0031] Attached Figure 6 This is a schematic diagram of a standard block of a shield tunnel lining ring with tenon;

[0032] Attached Figure 7 It is a schematic diagram of a block angle capped with a tenon lining ring;

[0033] Attached Figure 8 It is a schematic diagram of the minimum longitudinal offset distance when assembling the mortise and tenon lining ring capping blocks;

[0034] Attached Fig. 9 It is a schematic diagram of the staggered assembly method between the mortise and tenon lining rings;

[0035] Attached Fig.10 Prefabricate the tenonless lining ring layout for shield tunnel;

[0036] Attached Fig.11 This is the overall schematic diagram of the shield tunnel lining ring without tenon;

[0037] Attached Fig.12 This is a schematic diagram of the shield tunnel's tenonless lining ring capping block;

[0038] Attached Fig.13 This is a schematic diagram of the adjacent blocks of the shield tunnel lining ring without tenon;

[0039] Attached Fig.14 It is a schematic diagram of the bolt connection between the tenonless lining ring capping block and the adjacent block;

[0040] Attached Fig.15It is a schematic diagram of the assembly method between the rings of the mortise-less lining;

[0041] Description of reference numerals:

[0042] 1—prefabricated lining ring of shield tunnel; 11—capping block of shield tunnel lining; 12—adjacent block of shield tunnel lining; 13—standard block of shield tunnel lining;

[0043] 101—front groove of shield; 102—rear groove of shield; 103—longitudinal bolt hole; 104—circumferential bolt hole; 105—longitudinal bolt installation hand hole; 106—circumferential bolt installation hand hole;

[0044] 111—front end face of capping block shield; 112—rear end face of capping block shield; 113—inner adjacent face of capping block ring; 115—inner arc face of capping block; 116—front tenon of capping block; 117—rear tenon of capping block; 118—hanging hole of capping block; 119—through bolt installation hole of capping block;

[0045] 121—front end face of adjacent block shield; 122—rear end face of adjacent block shield; 123—first side face inside adjacent block ring; 124—second side face inside adjacent block ring; 125—inner arc face of adjacent block;

[0046] 131—front end face of standard block shield; 132—rear end face of standard block shield;

[0047] θ—half of the capping block division angle; α—capping block insertion angle; β—capping block joint angle; D—segment thickness; —Height of the tenon in front of the capping block; —Height of the tenon behind the capping block; L—Minimum longitudinal offset distance of the capping block;

[0048] S1—the first type of staggered assembly method; S2—the second type of staggered assembly method. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the core concept of the utility model and the following embodiments, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0050] The present application provides these embodiments to make the present application thorough and complete, and to fully express the scope of the present application to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0051] It should be noted that, in the description of this application, unless otherwise specified, the meaning of "several" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", "axial", "radial" and the like indicate positions or positional relationships only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on this application. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0052] In addition, the words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0053] It should also be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0054] All terms used in this application have the same meaning as those understood by those of ordinary skill in the art to which this application belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0055] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0056] With the gradual promotion of mechanized construction of underground engineering, more and more small tunnels are constructed by shield method. The shield method adopts prefabricated assembled lining structure. In order to facilitate construction and improve the connection strength between each segment block, a new segment lining ring structure is proposed.

[0057] The utility model aims to propose a segment structure for a tunnel constructed by the shield method. The segment structure is mainly used in shield tunnels with smaller cross-sections. It can solve the problem that the capping block has a large corresponding central angle and is difficult to assemble. At the same time, it reduces the number of bolt hand holes in the capping block and reduces the weakening of the segment structure. At the same time, the connection between the capping block and the adjacent block is more stable, and the number of bolts that need to be tightened during assembly is reduced, thereby reducing the construction process and improving construction efficiency.

[0058] In order to achieve the above-mentioned purpose, the prefabricated assembled shield tunnel segments adopted by the utility model include capping blocks, adjacent blocks and standard blocks. The adjacent segment rings are connected by bolt connection and mortise connection. During the assembly process, the standard blocks and adjacent blocks are assembled first, and then the capping blocks are assembled by first radial insertion and then longitudinal jacking. During longitudinal jacking, the rear mortise of the capping block of the current ring is inserted into the front groove of the adjacent block or standard block of the previous ring. A through bolt hole is arranged in the capping block in the annular direction, and the bolt passes through the capping block. Then, the capping block and the adjacent block of the current ring are connected by bolts, and nuts are installed in the bolt installation hand holes arranged on the adjacent blocks. After tightening, the connection is achieved.

[0059] In the prior art, when dividing a small-section shield tunnel with a diameter of no more than 3m into blocks, the central angle corresponding to the capping block is about 60°, and the pipe segments are connected by bolts. At this time, the size and weight of the capping block are relatively large, and it is difficult for the assembling machine to control the assembly accuracy during the assembly process, and the assembly speed is also slow. Therefore, the utility model proposes that the capping block adopts a smaller central angle, and the central angle is not greater than 30°. The inner arc surface of the capping block does not have an annular bolt installation hand hole, and a through annular bolt channel is provided inside. Bolt installation hand holes are provided on the adjacent blocks, and the bolts pass through the capping block. Nuts are installed in the two adjacent blocks to fix the bolts to connect the capping block to the adjacent blocks. Compared with the prior art, the bolt hand holes provided on the capping block are reduced, and the bolt installation process is also reduced.

[0060] Therefore, according to the segment structure proposed in the utility model patent, a small-angle capping block is used in a small-section shield tunnel, so that the bolts pass through the capping block, which can reduce the weakening effect of the bolt hole on the strength of the capping block and improve the assembly speed of the capping block.

[0061] As a preferred embodiment of the capping block, Fig.10 and Fig.11 As shown in the figure, it is used to be assembled between adjacent adjacent blocks, and the shield tunneling direction points out of the paper. Fig.12 As shown, the capping block comprises a capping block body,

[0062] A through-type mounting hole is provided on the adjacent surface 113 inside the capping block ring that runs through the left and right sides of the capping block body. The through-type mounting hole is used to insert the connecting parts between the adjacent adjacent blocks. The dividing angle of the capping block can be designed to be small enough, and the adjacent blocks on both sides can be connected through a through-type mounting hole. At the same time, there is no need to set too many mounting holes on the capping block, and there is no need to set mounting hand holes on the capping block body. However, it has the beneficial effects of high assembly efficiency and high structural strength.

[0063] On the basis of the above embodiment, as a preferred embodiment of the capping block, the through-type mounting hole is a capping block through-type bolt mounting hole 119 or a capping block through-type anchor bolt mounting hole or a capping block through-type cable mounting hole.

[0064] That is, the through-type mounting hole has multiple implementation methods, and different implementation methods can be assembled with multiple different connecting parts. When the through-type bolt mounting hole 119 of the capping block is adopted, it can be used for the installation of tension bolts; when the through-type anchor bolt mounting hole of the capping block is adopted, it can be used for the installation of ordinary anchor bolts and tension anchor bolts; when the through-type cable mounting hole of the capping block is adopted, it can be used for the installation of tension anchor cables.

[0065] Of course, when the shapes and sizes of the tension bolts, common anchor bolts, tension anchor bolts, and tension anchor cables are not much different, it is not necessary to set up various through-type mounting holes respectively, that is, one through-type mounting hole can be used to respectively realize the installation of various connectors. In addition, it is preferred that the through-type mounting hole is set as an arc hole extending along an arc line, so as to facilitate the adaptation with the corresponding adjacent block, that is, to facilitate the assembly of the corresponding connector and enhance the reliability of the connection structure.

[0066] Based on the above embodiment, as a preferred embodiment of the capping block, Figure 1 , Figure 2 and Figure 3 As shown, a capping block front tenon 116 is provided on the capping block shield front end face 111 of the capping block body. The capping block front tenon 116 is used to plug in adjacent blocks or standard blocks of adjacent shield segment ring groups, which can effectively improve the connection accuracy and connection strength of the annular seam, and can also enhance the connection accuracy and connection strength of the longitudinal seam, but the flexibility of assembly is slightly reduced.

[0067] Based on the above embodiment, as a preferred embodiment of the capping block, Figure 3As shown, a capping block rear tenon 117 is provided on the capping block shield rear end face 112 of the capping block body, and the capping block rear tenon 117 is used to plug in adjacent blocks or standard blocks of adjacent shield segment ring groups, further improving the connection accuracy and connection strength of the annular seam, and also further enhancing the connection accuracy and connection strength of the longitudinal seam.

[0068] As another preferred embodiment of the capping block, not shown in the figure, positioning grooves are provided on the capping block shield front end face 111 and / or the capping block shield rear end face 112 at both ends of the capping block body, and the positioning grooves are used to sleeve adjacent blocks or standard blocks of adjacent shield segment ring groups. That is, contrary to the positioning method of annular seam assembly in the above-mentioned embodiment, whether the positioning groove is provided on the capping block shield front end face 111, or the positioning groove is provided on the capping block shield rear end face 112, or the positioning groove is provided on both the capping block shield front end face 111 and the capping block shield rear end face 112, the connection accuracy and connection strength of the annular seam and the longitudinal seam can be further improved.

[0069] Based on the above embodiment, as a preferred embodiment of the capping block, Figure 7 As shown, the cross-section of the capping block body in the circumferential direction is a fan-shaped ring. When the capping block is assembled, it can form a standard circular cavity with the adjacent blocks and the standard blocks to avoid occupying the limited internal space.

[0070] The cross section of the capping block body in the axial direction is wedge-shaped. When assembled, the large end of the capping block body faces the excavation direction, which is convenient for axial insertion of the adjacent block during assembly, and has a tendency to tighten when the pipe segment provides a support reaction force for the excavator. Preferably, a capping block hoisting hole 118 is provided at the inner arc surface of the capping block body to facilitate lifting and assembly. It should be noted that, in addition to the structural form defined by the present technical scheme, in the above-mentioned technical scheme that does not define the cross-sectional shape of the capping block body in the circumferential direction, the capping block body can adopt various structural forms, such as a rectangular, trapezoidal, other polygonal, etc. cross section in the circumferential direction, as long as it can ensure that the adjacent surface in the capping block ring and the adjacent block in the circumferential direction are reliably fitted. Similarly, the cross section of the capping block body in the axial direction is wedge-shaped, which is a preferred embodiment. In addition, the cross section of the capping block body in the axial direction can also adopt other shapes, such as a rectangle, other polygonal, etc.

[0071] Based on the above embodiment, as a preferred embodiment of the capping block, Figure 7 As shown, the axes of the front tenon 116 of the capping block and the rear tenon 117 of the capping block are both located on the central axis plane of the capping block body.

[0072] Based on the above embodiment, as a preferred embodiment of the capping block, Figure 7 As shown, the orthographic projection area of ​​the outer arc surface of the capping block body is greater than, equal to, or less than the orthographic projection area of ​​the inner arc surface of the capping block body, and the capping blocks defined by the above three size relationships are suitable for different assembly methods. Among them, for the scheme in which the orthographic projection area of ​​the outer arc surface of the capping block body is greater than the orthographic projection area of ​​the inner arc surface of the capping block body, after the capping block, adjacent blocks, and standard blocks are assembled into a shield segment ring group, radial displacement of each segment can be prevented.

[0073] A shield segment ring group includes a capping block, an adjacent block and a standard block, such as Figure 1 , Figure 2 , Fig.10 , Fig.11 As shown, the capping block is the capping block described in any one of the above embodiments.

[0074] On the basis of the above embodiment, as a preferred embodiment of the shield segment ring group, Figure 4 As shown, the end face of the adjacent block close to the capping block is recorded as the second side surface 124 inside the adjacent block ring, an annular mounting hole connected to the through-type mounting hole is arranged between the second side surface 124 inside the adjacent block ring and the adjacent block inner arc surface 125, and an annular mounting hand hole matching the annular mounting hole is arranged on the adjacent block inner arc surface 125.

[0075] On the basis of the above embodiment, as a preferred embodiment of the shield segment ring group, Figure 3 , Figure 4 and Figure 6 As shown, when the capping block front tenon 116 and / or the capping block rear tenon 117 are provided on the capping block body, grooves matching the capping block front tenon 116 or the capping block rear tenon 117 are provided on the adjacent block shield front end face 121 and / or the adjacent block shield rear end face 122 and / or the standard block shield front end face 131 and / or the standard block shield rear end face 132 of the adjacent block.

[0076] On the basis of the above embodiment, as another preferred embodiment of the shield segment ring group, when the positioning groove is provided on the capping block body, positioning tenons matching the positioning groove are provided on the adjacent block shield front end face 121 and / or the adjacent block shield rear end face 122 and / or the standard block shield front end face 131 and / or the standard block shield rear end face 132 of the adjacent block, which are not shown in the figure.

[0077] As a preferred embodiment of the shield segment ring assembly, Figure 1 , 2As shown, the block angle of the shield tunnel lining capping block 11 is not greater than 30°, and the shield tunnel excavation direction points outside the paper. The shield tunnel lining adjacent blocks 12 are symmetrically arranged on both sides of the shield tunnel lining capping block 11 in a hand shape, and the shield tunnel lining standard blocks 13 are connected in sequence and are adjacent to the shield tunnel lining adjacent blocks 12.

[0078] like Figure 3 As shown, the front tenon 116 of the capping block is located on the front end face 111 of the capping block shield, the rear tenon 117 of the capping block is located on the rear end face 112 of the capping block shield, the capping block lifting hole 118 is opened on the inner arc surface 115 of the capping block, the capping block through-type bolt installation hole 119 is opened on the adjacent surface 113 inside the capping block ring, and penetrates the capping block along the annular direction, and there is no bolt installation hand hole on the inner arc surface of the capping block.

[0079] like Figure 4 As shown, the shield front groove 101 and the shield rear groove 102 are arranged on the adjacent block shield front end face 121 and the adjacent block shield rear end face 122 respectively, and longitudinal bolt holes 103 are arranged on both. The shield front groove 101 matches the rear tenon 117 of the capping block, and the shield rear groove 102 matches the front tenon 116 of the capping block. The first side surface 123 inside the adjacent block ring is adjacent to the shield tunnel lining standard block. Only one annular bolt hole 104 matching the through-type bolt installation hole 119 of the capping block is arranged on the second side surface 124 inside the adjacent block ring, and matches the adjacent surface 113 inside the capping block ring. The longitudinal bolt installation hand hole 105 and the annular bolt installation hand hole 106 are arranged on the inner arc surface 125 of the adjacent block.

[0080] like Figure 5 As shown, the inner arc surface of the capping block is not provided with an installation hand hole for the annular bolt, and a through bolt hole 119 is provided inside. The adjacent block is provided with corresponding annular bolt holes 104 and annular bolt installation hand holes 106. During installation, the bolts penetrate the capping block, and nuts are installed in the two adjacent blocks to fix the bolts, so as to connect the capping block with the adjacent block.

[0081] like Figure 6 As shown, a shield front groove 101 and a shield rear groove 102 are arranged on the standard block shield front end face 131 and the standard block shield rear end face 132 respectively. The shield front groove 101 matches with the capping block rear tenon 117, and the shield rear groove 102 matches with the capping block front tenon 116.

[0082] like Figure 7 , 8As shown, during the assembly process, the shield tunnel lining standard blocks are assembled first, then the adjacent blocks, and finally the capping blocks. When assembling the capping blocks, the assembly method of first radial insertion and then longitudinal jacking is adopted. To ensure that the capping blocks can be smoothly inserted radially, the capping blocks need to be staggered with the adjacent blocks longitudinally toward the front of the excavation before radial insertion, and the distance is greater than the minimum longitudinal staggered distance L of the capping blocks, and To ensure the height of the tenon behind the capping block The minimum longitudinal offset distance L of the capping block is affected, and the prefabrication of the segments is ensured Smaller than L.

[0083] like Fig. 9 As shown, the first type of staggered assembly method S1 refers to matching the rear groove of one of the standard blocks in the current ring with the front tenon position of the capping block of the previous ring, and inserting the rear tenon of the capping block of the current ring into the front groove of the corresponding standard block of the previous ring. When assembling and positioning the standard block, the staggered distance between the standard block of the current ring and the pre-assembly position along the longitudinal direction of the excavation front is greater than the height of the front tenon of the capping block. , and then the assembly method of first radial insertion and then longitudinal jacking is adopted to assemble it into place, and the remaining adjacent blocks or standard blocks are assembled into place by conventional assembly methods. The second type of staggered assembly method S2 refers to matching the rear groove of one of the adjacent blocks of the current ring with the front tenon position of the capping block of the previous ring, and inserting the rear tenon of the capping block of the current ring into the front groove of the corresponding adjacent block of the previous ring. When assembling and positioning the adjacent block of the current ring, it is necessary to make the offset distance between the adjacent block of the current ring and the pre-assembly position along the longitudinal direction of the excavation front greater than the height of the front tenon of the capping block , and then the assembly method of first radial insertion and then longitudinal jacking is used to assemble it into place, and the remaining adjacent blocks or standard blocks are assembled into place using conventional assembly methods.

[0084] As a preferred embodiment of the shield segment ring assembly, Fig.10 , 11 As shown, each block in the ring is not provided with a tenon and a corresponding groove structure, and the shield tunnel excavation direction points out of the paper. The block angle of the shield tunnel lining capping block 11 is not greater than 30°, and the shield tunnel excavation direction points out of the paper. The shield tunnel lining adjacent blocks 12 are symmetrically arranged on both sides of the shield tunnel lining capping block 11 in a hand shape, and the shield tunnel lining standard blocks 13 are connected in sequence and are adjacent to the shield tunnel lining adjacent blocks 12.

[0085] like Fig.12 As shown, the through-type bolt installation hole 119 of the capping block is opened on the adjacent surface 113 inside the capping block ring and penetrates the capping block along the annular direction. There is no bolt installation hand hole on the inner arc surface 115 of the capping block.

[0086] like Fig.13As shown, the first side surface 123 inside the adjacent block ring is adjacent to the standard block of the shield tunnel lining, and only one annular bolt hole 104 matching the through-type bolt mounting hole 119 of the capping block is arranged on the second side surface 124 inside the adjacent block ring, and matching the adjacent surface 113 inside the capping block ring, and a longitudinal bolt mounting hand hole 105 and annular bolt mounting hand hole 106 are arranged on the inner arc surface 125 of the adjacent block.

[0087] like Fig.14 As shown, during the assembly process within the ring, the shield tunnel lining standard blocks are assembled first, then the adjacent blocks are assembled, and finally the capping blocks are assembled. When assembling the capping blocks, an assembly method of first radial insertion and then longitudinal jacking is adopted. After the capping blocks are in place, the bolts are passed through the capping blocks through the through bolt installation holes 119 of the capping blocks, and then nuts are installed in the annular bolt installation hand holes 106 of the two adjacent blocks to fix the bolts, so as to connect the capping blocks with the adjacent blocks.

[0088] like Fig.15 As shown, the structure without tenons and grooves makes the assembly between adjacent rings more flexible, which is conducive to turning and adjusting the excavation direction. The rings can be connected in the form of through seams and staggered seams, and the longitudinal bolt holes between the rings are aligned and then the adjacent rings are connected by bolts.

[0089] The parts not described in detail in the present invention are all conventional technical means known to those skilled in the art.

[0090] The above content shows and describes the basic principle, main features and beneficial effects of the utility model. The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A capping block, used for assembling between adjacent adjacent blocks, characterized in that: It comprises a capping block body, and through-type mounting holes are provided on the inner adjacent surfaces (113) of the capping block ring that penetrate the left and right sides of the capping block body, and the through-type mounting holes are used to insert the connecting pieces between the adjacent adjacent blocks.

2. The capping block according to claim 1, characterized in that: The through-type installation hole is a through-type bolt installation hole (119) of the capping block, or a through-type anchor bolt installation hole of the capping block, or a through-type cable installation hole of the capping block.

3. The capping block according to claim 1 or 2, characterized in that: A capping block front tenon (116) is provided on the capping block shield front end face (111) of the capping block body, and the capping block front tenon (116) is used for plugging in adjacent blocks or standard blocks of adjacent shield segment ring groups.

4. The capping block according to claim 3, characterized in that: A capping block rear tenon (117) is provided on the capping block shield rear end face (112) of the capping block body, and the capping block rear tenon (117) is used for plugging in adjacent blocks or standard blocks of adjacent shield segment ring groups.

5. The capping block according to claim 1 or 2, characterized in that: Positioning grooves are provided on the capping block shield front end face (111) and / or the capping block shield rear end face (112) at both ends of the capping block body, and the positioning grooves are used to sleeve adjacent blocks or standard blocks of adjacent shield segment ring groups.

6. The capping block according to claim 4, characterized in that: The cross section of the capping block body in the circumferential direction is a fan ring, a rectangle or a trapezoid, and the cross section in the axial direction is a wedge or a rectangle.

7. The capping block according to claim 6, characterized in that: The axes of the front tenon (116) of the capping block and the rear tenon (117) of the capping block are both located on the central axis plane of the capping block body.

8. The capping block according to claim 6 or 7, characterized in that: The orthographic projection area of ​​the outer arc surface of the capping block body is greater than, equal to, or smaller than the orthographic projection area of ​​the inner arc surface of the capping block body.

9. A shield segment ring assembly, comprising a capping block, an adjacent block and a standard block, characterized in that: The capping block is the capping block according to any one of claims 1 to 8.

10. The shield segment ring assembly according to claim 9, characterized in that: The end face of the adjacent block close to the capping block is recorded as the second inner side face (124) of the adjacent block ring, an annular mounting hole connected to the through-type mounting hole is arranged between the second inner side face (124) of the adjacent block ring and the inner arc surface (125) of the adjacent block, and an annular mounting hand hole matching the annular mounting hole is arranged on the inner arc surface (125) of the adjacent block.

11. The shield segment ring assembly according to claim 9 or 10, characterized in that: When the capping block body is provided with the capping block front tenon (116) and / or the capping block rear tenon (117), a groove matching the capping block front tenon (116) or the capping block rear tenon (117) is provided on the adjacent block shield front end face (121) and / or the adjacent block shield rear end face (122) and / or the standard block shield front end face (131) and / or the standard block shield rear end face (132); When the positioning groove is provided on the capping block body, positioning tenons matching the positioning groove are provided on the adjacent block shield front end face (121) and / or the adjacent block shield rear end face (122) and / or the standard block shield front end face (131) and / or the standard block shield rear end face (132) of the adjacent block.

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