Novel positioning tenon structure for tunnel segment

Abstract

The utility model provides a novel positioning tenon structure for a tunnel segment, and belongs to the technical field of limiting components between shield tunnel segment assembly rings. Comprising a positioning tenon structure body, a through hole is formed in the center of the positioning tenon structure body, the outer circle of the positioning tenon structure body is composed of a mortise joint end, a mortise joint end and a circular seam shearing face, the mortise joint end and the mortise joint end are located at the two ends of the circular seam shearing face respectively, and the outer conicity of the mortise joint end and the outer conicity of the mortise joint end are different. A plurality of annular steps are evenly distributed on the outer circle of the joint end of the mortise, a plurality of ridges are evenly distributed in the longitudinal direction of the annular steps, and the annular steps and the ridges are used for positioning the tenon and the mortise to generate interference fit. The novel positioning tenon structure is adopted for assembling the duct pieces, the difficulty of installing duct piece bolts is reduced, the capacity of bearing the reactive torque of a shield tunneling machine after a shield tail is disengaged is achieved, the effect of the whole process of locating, connecting and bearing the duct pieces is guaranteed, and finally the forming quality of a tunnel is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of inter-ring limiting components for shield tunnel segments assembly, and particularly relates to a novel positioning tenon structure for tunnel segments. Background Art

[0002] At present, in shield tunnel construction, the main methods for assembling the longitudinal and circumferential joints between the segments are as follows: (1) concrete segment socket-and-socket structure; (2) concrete segment embedded component structure; and (3) concrete segment inter-ring limiting component structure. Among them, the concrete segment inter-ring limiting component structure requires little modification to the segment formwork, causes little damage to the segment structure, has a simple assembly operation method, has strong resistance to shear deformation, and has good positioning effect. However, the existing concrete segment ring limiting components still have the following problems: (1) The diameter of the through hole of the existing positioning tenon body is too small to meet the space requirement of the bend of the PVC pipe for the segment bolt to pass through; (2) In the later stage of shield tunneling, the segment bolt holes, tenon holes and tenon grooves need to be sealed and protected. After sealing, the segment bolts and the segment are required to be firmly connected and not fall off. The bolt holes, tenon holes and tenon grooves are required to meet the pull-out resistance requirements after sealing. The sealing is carried out by micro-expansion cement + polypropylene fiber. The outer circle of the existing positioning tenon structure has no buckle, which cannot form the nesting and meshing of the positioning tenon and the sealing material, and cannot meet the pull-out resistance requirements after the bolt holes, tenon holes and tenon grooves are sealed. (3) The existing positioning tenon structure cannot remove and store debris such as mud, loose cement blocks in the tenon holes and tenon grooves, making it difficult to ensure the assembly accuracy of the annular seam segment. This makes it difficult to achieve good results in segment positioning, connection, and load-bearing, thereby reducing the final tunnel molding quality. Therefore, it is necessary to propose improvements. Utility Model Content

[0003] The technical problem solved by the utility model is: the purpose is to provide a new positioning tenon structure for tunnel segments, which not only reduces the difficulty of installing the segment bolts, but also has the ability to withstand the counter-torque of the shield machine after the shield tail is disengaged, so that the whole process effect of segment positioning, connection and bearing can be guaranteed, and the forming quality of the tunnel can be guaranteed.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by this utility model is:

[0005] A new positioning tenon structure for a tunnel segment includes a positioning tenon structure body, the center of the positioning tenon structure body is a through hole, the outer circle of the positioning tenon structure body consists of three parts: a tenon hole joint end, a tenon groove joint end and a circular seam shear surface, the tenon hole joint end and the tenon groove joint end are respectively located at the two ends of the circular seam shear surface, the outer tapers of the tenon hole joint end and the tenon groove joint end are different, the outer circle of the tenon hole joint end is evenly distributed with multiple annular steps, and multiple ridges are evenly distributed longitudinally along the annular steps, the annular steps and ridges are used to produce an interference fit between the positioning tenon and the tenon hole.

[0006] As a further limitation of the above solution, the mortise and tenon joint ends and the mortise and tenon joint ends on both sides are of equal length along both sides of the annular seam shear surface.

[0007] To further limit the above solution, the outer circle of the mortise and tenon joint end is formed by one taper, and the outer circle of the mortise and tenon joint end is formed by two tapers. The outer circle of the mortise and tenon joint end has one taper near the annular seam and another taper near the mortise.

[0008] As a further limitation of the above solution, the outer circle of the mortise and tenon joint end is evenly distributed with 7 annular steps, and 6 ridges are evenly distributed longitudinally along the annular steps.

[0009] Further limiting the above solution, the outer circles of the non-stress-bearing surfaces between adjacent ridges are scraped to form six outer circles of stress-bearing surfaces of the mortise holes evenly distributed corresponding to the ridges, the width of the outer circles of the stress-bearing surfaces of the mortise holes is 12 mm, and the outer circles of the stress-bearing surfaces of the mortise holes can meet the shear force of 150 kN between the seams without breaking; the outer circles of the non-stress-bearing surfaces between adjacent ridges are scraped to form the outer circles of the non-stress-bearing surfaces of the mortise holes;

[0010] The outer circle of the tenon-groove joint end is scraped to form 6 evenly distributed outer circles of the tenon-groove stress-bearing surface, the width of the outer circle of the tenon-groove stress-bearing surface is 12mm, and the outer circle of the tenon-groove stress-bearing surface can meet the shear force of 150KN between the seams without breaking; the outer circle of the non-stress-bearing surface between the adjacent outer circles of the tenon-groove stress-bearing surface is scraped to form the outer circle of the tenon-groove non-stress-bearing surface.

[0011] To further limit the above solution, the flesh-cutting lengths of the outer circles of the non-stress-bearing surfaces of the mortise hole and the mortise groove are both 1 / 3 of the length of the positioning mortise structure.

[0012] To further limit the above solution, the outer circles of the non-stress-bearing surfaces of the mortise hole and the mortise groove are both cylindrical surfaces, and the diameters are the median values ​​of the annular seam shear surfaces.

[0013] As a further limitation of the above solution, the length of the annular seam shear surface between the mortise hole joint end and the mortise groove joint end is 1 / 3 of the length of the positioning tenon structure.

[0014] As a further limitation of the above solution, the novel positioning tenon structure is made of glass fiber reinforced polyamide.

[0015] The advantages of this utility model compared with the prior art are:

[0016] 1. This solution uses a new positioning tenon structure for segment assembly, which not only reduces the difficulty of segment bolt installation, but also has the ability to withstand the shield machine's counter-torque after the shield tail is disengaged, ensuring the effectiveness of the entire process of segment positioning, connection, and load bearing, ultimately ensuring the quality of the tunnel formation;

[0017] 2. The new positioning tenon structure of this solution can be assembled or embedded, and both ensure the positioning, connection, and load-bearing of the tunnel segments. Furthermore, this structure optimizes the design of seven steps and six ridges at the tenon joint end to ensure maximum interference fit during tenon assembly. Furthermore, the cross-section of the non-stress-bearing surface is optimized to ensure both functionality and cost-effectiveness.

[0018] 3. The segment positioning tenon products of this scheme are injection molded with glass fiber reinforced polyamide material, which has good mechanical properties, high dimensional stability, good consistency, high strength, good toughness, corrosion resistance, good insulation, high softening point and good heat resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 2 This is the main view of the utility model;

[0021] Figure 3 It is a left view of the utility model;

[0022] Figure 4 For this utility model Figure 3 AA direction diagram in;

[0023] Figure 5 It is a right side view of the utility model;

[0024] Figure 6 For this utility model Figure 5 BB direction diagram in the figure;

[0025] Figure 7 This is a diagram showing the arrangement of the tenon holes on the end faces of the tube segments in the embodiment of the present utility model;

[0026] Figure 8 This is a diagram showing the arrangement of the tongue and groove on the end face of the tube segment in the embodiment of the present utility model;

[0027] Figure 9 This is a schematic diagram of the assembly of the new positioning tenon structure and the pipe segment in the embodiment of the present utility model. DETAILED DESCRIPTION

[0028] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] It should be noted that, as used herein, the terms "comprise," "include," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising the elements.

[0030] See also Figure 1-9 , describe in detail the embodiments of the present utility model.

[0031] Example: A new positioning tenon structure for tunnel segments, see Figure 1-6 As shown, it includes a positioning tenon structure body, the center of which is a through hole to facilitate the passage of the segment bolts through the PVC pipe. The outer circle of the positioning tenon structure body is composed of three parts: the tenon hole joint end 1, the tenon groove joint end 2, and the annular seam shear surface 3. The tenon hole joint end 1 and the tenon groove joint end 2 are respectively located at the two ends of the annular seam shear surface 3. The outer tapers of the tenon hole joint end 1 and the tenon groove joint end 2 are different. The outer circle of the tenon hole joint end 1 is uniformly distributed with multiple annular steps 1-1, and multiple ridges 1-2 are uniformly distributed longitudinally along the annular steps 1-1. The annular steps 1-1 and the ridges 1-2 are used to create an interference fit between the positioning tenon and the tenon hole.

[0032] In this embodiment, a new positioning tenon structure is used to assemble the segments, which not only reduces the difficulty of installing the segment bolts, but also has the ability to withstand the counter-torque of the shield machine after the shield tail is disengaged, so that the whole process of segment positioning, connection and bearing can be guaranteed, and ultimately the forming quality of the tunnel can be guaranteed.

[0033] Preferably, the mortise and tenon joint ends 1 and the mortise and tenon joint ends 2 on both sides are of equal length along the annular seam shear surface 3 .

[0034] In a specific embodiment: the outer circle of the mortise and tenon joint end 1 is formed by one taper, and the outer circle of the mortise and tenon joint end 2 is formed by two tapers. The outer circle of the mortise and tenon joint end 2 has one taper near the annular seam and another taper near the mortise.

[0035] In a specific embodiment: the outer circle of the mortise and tenon joint end 1 is evenly distributed with 7 annular steps 1-1, and 6 ridges 1-2 are evenly distributed longitudinally along the annular steps 1-1. The annular steps and the longitudinal ridges are used to position the tenon and the mortise to produce an interference fit.

[0036] The outer circles of the non-stress-bearing surfaces between the adjacent ridges 1-2 are scraped to form six outer circles of the stress-bearing surfaces of the mortise holes 1-3 evenly distributed corresponding to the ridges 1-2. The width of the outer circles of the stress-bearing surfaces of the mortise holes 1-3 is 12 mm. After calculation and verification, the outer circles of the stress-bearing surfaces of the mortise holes 1-3 can meet the shear force of 150 kN between the seams without breaking. The outer circles of the non-stress-bearing surfaces between the adjacent ridges 1-2 are scraped to form the outer circles of the non-stress-bearing surfaces of the mortise holes 1-4.

[0037] After the outer circle of the tenon-groove joint end 2 is scraped, 6 evenly distributed outer circles of the tenon-groove stress-bearing surface 2-1 are formed. The width of the outer circle of the tenon-groove stress-bearing surface 2-1 is 12 mm. After calculation and verification, the outer circle of the tenon-groove stress-bearing surface 2-1 can meet the shear force of 150KN between the seams without breaking; after the outer circle of the non-stress-bearing surface between the adjacent outer circles of the tenon-groove stress-bearing surface 2-1 is scraped, the outer circle of the tenon-groove non-stress-bearing surface 2-2 is formed.

[0038] The length of the outer circle 1-4 of the non-stress-bearing surface of the mortise hole and the outer circle 2-2 of the non-stress-bearing surface of the mortise groove are both 1 / 3 of the length of the positioning mortise structure.

[0039] In a specific embodiment: the outer circle 1-4 of the non-stress-bearing surface of the mortise hole and the outer circle 2-2 of the non-stress-bearing surface of the mortise groove are both cylindrical surfaces, and the diameter is the median value of the annular seam shear surface.

[0040] In this embodiment, 7 annular steps and 6 ridges are optimized and designed for the mortise and tenon joint end to ensure the maximum interference fit of the mortise and tenon assembly, and the cross-section of the non-stress-bearing surface is optimized to ensure the functionality and cost-effectiveness.

[0041] In a specific embodiment, the length of the annular shear surface 3 between the mortise and tenon joint end 1 and the mortise and tenon joint end 2 is 1 / 3 of the length of the positioning tenon structure.

[0042] Preferred: The new positioning tenon structure is injection molded by glass fiber reinforced polyamide material, which has the advantages of small modification to the pipe segment template, small damage to the pipe segment structure, simple assembly operation method, strong resistance to shear deformation, and good positioning effect; it has good mechanical properties, and has obvious advantages such as high dimensional stability, good consistency, high strength, good toughness, corrosion resistance, good insulation, high softening point, and good heat resistance.

[0043] The main technical parameters of this new locating tenon structure are: (1) The locating tenon can withstand a 150kN inter-seam shear force without breaking. (2) The elastic deformation of the locating tenon during the shear test shall not exceed 10mm. (3) The plastic deformation capacity of the locating tenon can reach a shear deformation of 3mm without failure. (4) After the fatigue test, there is no obvious damage on the appearance.

[0044] Instructions for use of this new positioning tenon structure:

[0045] (1) Use professional jack tools to install the tenon hole side of the pipe segment first, and ensure that the position tolerances of the tenon, tenon hole and bolt hole meet the coaxiality accuracy level;

[0046] (2) After installing the mortise and tenon side of the segment, the position tolerances of the mortise and tenon and the bolt holes shall meet the coaxiality accuracy level, such as Figure 7-9 As shown;

[0047] (3) Visually determine whether the penetration and interference fit of the locating tenon in the tenon hole and the tenon groove meet the installation standards, and ensure that the segment structure and the locating tenon are free of damage by "looking, listening, touching, and leaning", and that the straightness and roundness of the longitudinal and circumferential seams of the segment meet the requirements;

[0048] (4) Insert the PVC sleeve and segment bolts through the grouting holes on the inner wall of the segment and pour in self-compacting concrete.

[0049] (5) The design service life of the locating tenon is 100 years. The installation process is a concealed project. Therefore, the factory reliability, durability and adaptability requirements of the locating tenon product are also 100 years.

[0050] (6) If the positioning tenon is found to be damaged by "looking, listening, touching and leaning" during the installation process, it should be replaced in time; after the installation is completed, use a horizontal ruler to check the flatness deviation of the adjacent pipe segments of the circumferential seam and longitudinal seam within 3mm, which can determine that the plastic deformation capacity of the positioning tenon can reach 3mm of shear deformation without failure.

[0051] The advantages of this utility model are as follows: the diameter of the through-hole of the positioning tenon structure is relatively large, which is sufficient to meet the space required for the bend of the PVC pipe through which the segment bolts pass; the outer circle of the positioning tenon structure body has a buckle, which can form a nesting and meshing between the positioning tenon and the sealing material, meeting the pull-out resistance requirements after the bolt hole, tenon hole, and tenon groove are blocked; the positioning tenon structure can remove and store debris such as mud and loose cement blocks in the tenon hole and tenon groove, ensuring the assembly accuracy of the annular seam segment. This ensures that the segment positioning, connection, and load-bearing are achieved, and the final tunnel forming quality is guaranteed.

[0052] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0053] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A new positioning tenon structure for tunnel segments, characterized by: The invention comprises a positioning tenon structure body, wherein the center of the positioning tenon structure body is a through hole, and the outer circle of the positioning tenon structure body consists of three parts: a tenon hole joint end (1), a tenon groove joint end (2) and an annular seam shearing surface (3). The tenon hole joint end (1) and the tenon groove joint end (2) are respectively located at two ends of the annular seam shearing surface (3). The outer circle tapers of the tenon hole joint end (1) and the tenon groove joint end (2) are different. The outer circle of the tenon hole joint end (1) is uniformly distributed with multiple annular steps (1-1), and multiple ridges (1-2) are uniformly distributed longitudinally along the annular steps (1-1). The annular steps (1-1) and the ridges (1-2) are used to generate interference fit between the positioning tenon and the tenon hole.

2. The novel positioning tenon structure for tunnel segments according to claim 1 is characterized in that: The tenon hole joint ends (1) and the tenon groove joint ends (2) on both sides are of equal length along both sides of the annular seam shear surface (3).

3. The novel positioning tenon structure for tunnel segments according to claim 1 is characterized in that: The outer circle of the mortise and tenon joint end (1) is formed by one taper, and the outer circle of the mortise and tenon joint end (2) is formed by two tapers. The outer circle of the mortise and tenon joint end (2) has one taper near the annular seam and another taper near the mortise.

4. The novel positioning tenon structure for tunnel segments according to claim 1 is characterized in that: Seven annular steps (1-1) are evenly distributed on the outer circle of the mortise joint end (1), and six ridge lines (1-2) are evenly distributed longitudinally along the annular steps (1-1).

5. The novel positioning tenon structure for tunnel segments according to claim 4 is characterized in that: The outer circles of the non-stress-bearing surfaces between adjacent ridges (1-2) are scraped to form six outer circles of the stress-bearing surfaces of the mortise holes (1-3) evenly distributed corresponding to the ridges (1-2), the width of the outer circles of the stress-bearing surfaces of the mortise holes (1-3) being 12 mm, and the outer circles of the stress-bearing surfaces of the mortise holes (1-3) meeting the requirement of a shear force of 150 kN without breaking; the outer circles of the non-stress-bearing surfaces between adjacent ridges (1-2) are scraped to form the outer circles of the non-stress-bearing surfaces of the mortise holes (1-4); The outer circle of the tenon-groove joint end (2) is scraped to form six evenly distributed outer circles of the tenon-groove stress-bearing surface (2-1), the width of the outer circle of the tenon-groove stress-bearing surface (2-1) is 12 mm, and the outer circle of the tenon-groove stress-bearing surface (2-1) can withstand a shear force of 150 kN between the seams without breaking; the outer circle of the non-stress-bearing surface between adjacent outer circles of the tenon-groove stress-bearing surface (2-1) is scraped to form an outer circle of the tenon-groove non-stress-bearing surface (2-2).

6. The novel positioning tenon structure for tunnel segments according to claim 5 is characterized in that: The flesh-engaging lengths of the outer circles of the non-stress-bearing surfaces of the mortise holes (1-4) and the outer circles of the non-stress-bearing surfaces of the mortise grooves (2-2) are both 1 / 3 of the length of the positioning mortise structure.

7. The novel positioning tenon structure for tunnel segments according to claim 6 is characterized in that: The outer circle of the non-stress-bearing surface of the mortise hole (1-4) and the outer circle of the non-stress-bearing surface of the mortise groove (2-2) are both cylindrical surfaces, and the diameters thereof are the median values ​​of the annular seam shearing surfaces.

8. The novel positioning tenon structure for tunnel segments according to claim 1 is characterized in that: The length of the annular seam shear surface (3) between the mortise and tenon joint end (1) and the mortise and tenon joint end (2) is 1 / 3 of the length of the positioning tenon structure.

9. The novel positioning tenon structure for tunnel segments according to claim 1 is characterized in that: The novel positioning tenon structure is made of glass fiber reinforced polyamide.

Images