Segment connecting device with functions of shear pin and bolt and tunnel segment structure

Abstract

The invention provides a duct piece connecting device with functions of a shear pin and a bolt and a tunnel duct piece structure, the duct piece connecting device comprises a connecting shell, the connecting shell is internally provided with a cavity penetrating through the length direction, and one end of the inner wall of the connecting shell is provided with a groove perpendicular to the cavity; the buckling piece is located in the groove, an elastic piece is arranged between the buckling piece and the connecting shell, and a through hole is formed in the center of the buckling piece; the assembly type connector is inserted into the cavity of the connecting shell from one end of the connecting shell and penetrates through the through hole of the buckling piece, and the two ends of the assembly type connector are exposed out of the connecting shell; the assembly type connector and the buckling piece are buckled with each other. The duct piece connecting device has the dual functions of a shear pin and a bolt, the safety, reliability and stability of shield tunnel duct piece connection can be improved, the number of connecting pieces between shield tunnel duct pieces is reduced, and the mounting process of the connecting pieces is simplified.

Description

Technical Field

[0001] The present invention relates to the technical field of shield tunnels, and in particular to a segment connection device and a tunnel segment structure having both shear pin and bolt functions. Background Art

[0002] Shield tunnel is a type of tunnel constructed by shield method. It is widely used in subway, railway, highway, municipal, hydropower and other tunnel projects, especially in urban subway construction. Shield method is a fully mechanized construction method. The shield machine is advanced underground, and the shield shell and segments are used to support the surrounding rock to prevent collapse in the tunnel. During the tunnel excavation process, precast concrete segments are assembled into rings to form the main structure of the tunnel. The connection structure between these segments not only needs to withstand shear force, but also needs to have a certain tensile strength to ensure the overall stability and safety of the tunnel.

[0003] In the shield tunnel segment connection, shear pins are a kind of components used in concrete segments (shield tunnel lining). The main design purpose of shear pins is to play a protective role in mechanical structures, especially in situations where shear force needs to be borne. Shear pins transfer the load between segments to adjacent segments through shearing action, effectively transferring and decomposing shear force, so that various parts of the tunnel can work together, thereby ensuring the stability and safety of the tunnel structure; shear pins can also balance the displacement between segment ring blocks, so that the tunnel has better seismic performance in natural disasters such as earthquakes, and improve the seismic performance of the tunnel. When a component in the mechanical structure is subjected to excessive shear force, the shear pins will be sheared as expected by the design, thereby protecting other components from damage. This "sacrificial" protection mechanism makes shear pins very useful in situations where high shear stress needs to be borne and structural damage needs to be prevented.

[0004] The traditional shield tunnel segment connection structure includes shear pins, bolts and other connectors. As mentioned above, shear pins are mainly used to withstand shear forces, while bolts are used to provide additional tightening and tensile strength. However, these connectors are usually used separately, and more connectors are required when connecting segments, and the installation operation is more complicated. In addition, traditional connections require manual insertion of bolts and manual tightening of bolts with pneumatic wrenches, which is inefficient and has poor tightening effects, and this area often becomes a water seepage channel. Summary of the invention

[0005] In view of the defects in the prior art, an object of the present invention is to provide a segment connection device and a tunnel segment structure having the functions of both shear pins and bolts.

[0006] According to one aspect of the present invention, there is provided a segment connection device having both shear pin and bolt functions, comprising:

[0007] A connecting shell, wherein a cavity is provided inside the connecting shell and runs through the length direction, and a groove is provided at one end of the inner wall of the connecting shell and is perpendicular to the cavity;

[0008] A snap fastener, the snap fastener is located in the groove, an elastic member is provided between the snap fastener and the connecting shell, and a through hole is provided at the center of the snap fastener;

[0009] An assembled joint, the assembled joint is inserted into the cavity of the connecting shell from one end of the connecting shell and passes through the through hole of the snap member, both ends of the assembled joint are exposed from the connecting shell; the assembled joint and the snap member are snapped with each other.

[0010] Optionally, the connecting shell has a hollow cylindrical structure, including two shells with semicircular cross-sections, namely a first shell and a second shell;

[0011] The first shell is provided on the fitting surface with a first semicircular cavity running through the length direction and a first semicircular groove perpendicular to the first semicircular cavity;

[0012] The second shell is provided on the fitting surface with a second semicircular cavity running through the length direction, and a second semicircular groove perpendicular to the second semicircular cavity;

[0013] The first semicircular cavity and the second semicircular cavity are butted together to form a cavity inside the connecting shell; the first semicircular groove and the second semicircular groove are butted together to form a circular groove.

[0014] Optionally, the assembled joint has a rod-shaped structure, and the assembled joint includes a first section, a second section, a third section and a fourth section in sequence along the length direction, the first section is a tip portion, the second section has the same diameter as the fourth section, and the diameter of the third section is larger than the diameter of the second section.

[0015] Optionally, the first section is exposed from the other end of the connecting shell, and part of the fourth section is exposed from one end of the connecting shell.

[0016] Optionally, a first boss is provided at the other end of the inner wall of the first shell, and a second boss is provided at the other end of the inner wall of the second shell, and the first boss and the second boss are butted together to form a circular hole, and the diameter of the circular hole is smaller than the diameter of the cavity;

[0017] The size of the second section of the assembled joint matches the diameter of the cavity; the first boss and the second boss prevent the second section of the assembled joint from passing through the other end of the connecting shell.

[0018] Optionally, corresponding mounting holes are provided at four corners of the outer surfaces of the first shell and the second shell, and fasteners pass through the mounting holes to assemble the first shell and the second shell to form the connecting shell.

[0019] Optionally, the snap fastener is an annular snap fastener, and the shape and size of the annular snap fastener match the circular groove;

[0020] An annular groove and an annular protrusion are provided on the outer surface of the buckle, the annular protrusion serves as a shear block, and the elastic member is located in the annular groove.

[0021] Optionally, the diameter of the fourth section of the assembled joint matches the diameter of the through hole, and the snap-fitting piece is snap-fitted to the end of the fourth section close to the third section.

[0022] Optionally, the elastic member is a spring, and the spring is located on the outer periphery of the buckle member.

[0023] According to another aspect of the present invention, there is provided a tunnel segment structure, comprising a plurality of segments, wherein adjacent segments are connected by the segment connection device having both shear pin and bolt functions.

[0024] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0025] The segment connection device provided by the present invention can realize rapid longitudinal connection of shield tunnels, improve construction efficiency, and reduce bolt hole drainage channels. At the same time, the segment connection device has the dual functions of shear pins and bolts, integrating the advantages of the two connectors, and can improve the safety, reliability and stability of shield tunnel segment connections. It can also greatly reduce the number of connectors between shield tunnel segments and simplify the connector installation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0027] Figure 1 It is a structural schematic diagram of a pipe segment connection device in one embodiment of the present invention;

[0028] Figure 2 It is a front view schematic diagram of a pipe segment connection device in one embodiment of the present invention;

[0029] Figure 3 It is a top view schematic diagram of a pipe segment connection device in one embodiment of the present invention;

[0030] Figure 4 A side view schematic diagram of a pipe segment connection device in one embodiment of the present invention;

[0031] Figure 5 It is a partial structural schematic diagram of a pipe segment connection device in one embodiment of the present invention;

[0032] Figure 6 for Figure 5 The corresponding BB section view;

[0033] Figure 7 for Figure 5 The corresponding CC section view;

[0034] Figure 8 A schematic side view of an assembled joint in one embodiment of the present invention;

[0035] Fig. 9 for Figure 8 The corresponding CC section view;

[0036] Fig.10 It is a structural schematic diagram of an assembled joint in one embodiment of the present invention;

[0037] Fig.11 Schematic diagram of the overall structure of the pipe segment connection device in one embodiment of the present invention (excluding the first shell);

[0038] Fig.12 The figure is a schematic diagram of the overall structure of a pipe segment connection device in one embodiment of the present invention.

[0039] In the figure, the reference numerals correspond to:

[0040] 1-connection shell, 2-assembled joint, 3-fastener;

[0041] 11-first housing, 12-first boss, 13-mounting hole;

[0042] 21- first paragraph, 22- second paragraph, 23- third paragraph, 24- fourth paragraph;

[0043] 31- shear block, 32- elastic member. DETAILED DESCRIPTION

[0044] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several variations and improvements may be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0045] It should be noted that, in the present application, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only a relational word determined for the convenience of describing the structural relationship of each component or element of the present application, and does not specifically refer to any component or element in the present application, and cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. Moreover, the terms "first", "second", etc. are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described here can be implemented in an order other than that illustrated or described here.

[0046] In this application, terms such as "fixed connection", "connected", "connection", etc. should be understood in a broad sense, indicating that it can be fixedly connected, integrally connected or detachably connected; it can be directly connected or indirectly connected through an intermediate medium. Relevant technicians in this field can determine the specific meanings of the above terms in this application according to specific circumstances, and they should not be understood as limitations on this application.

[0047] Reference Figure 1-Figure 12 , a pipe segment connection device with both shear pin and bolt functions provided by an embodiment of the present invention comprises a connection shell 1, a fastener 3 and an assembled joint 2, wherein a cavity is provided inside the connection shell 1 in the length direction, and a groove perpendicular to the cavity is provided at one end of the inner wall of the connection shell 1; the fastener 3 is located in the groove, an elastic member 32 is provided between the fastener 3 and the connection shell 1, and a through hole is provided at the center of the fastener 3; the assembled joint 2 is inserted into the cavity of the connection shell 1 from one end of the connection shell 1, and passes through the through hole of the fastener 3, and both ends of the assembled joint 2 are exposed from the connection shell 1 to facilitate better insertion into the pipe segment; the assembled joint 2 and the fastener 3 are engaged with each other. The shear pin, as the outer covering (i.e., the fastener 3), is relatively large in diameter and thicker than the rod bodies on both sides, and can be made of polyamide material to achieve shear resistance. The rod body of the device itself is equivalent to a bolt, which can achieve tensile resistance.

[0048] The embodiment of the present invention integrates the functions of shear pins and bolts into one connecting device to achieve an integrated design. The connecting device combines the advantages of shear pins and bolts, has high strength and high stability, can withstand various complex loads and deformations, ensures the overall safety and stability of the tunnel, and can also reduce the number of connecting parts between tunnel segments, simplify the installation process, and reduce production costs.

[0049] The connecting shell 1 is a basic component of the connecting device, which is made of high-strength, corrosion-resistant materials. It can accommodate and fix the snap-on parts 3 and the assembled joint 2 to ensure a tight fit and effective connection between the components. In some embodiments, the connecting shell 1 has a hollow cylindrical structure, including two shells with semicircular cross-sections, namely a first shell 11 and a second shell; the first shell 11 is provided with a first semicircular cavity running through the length direction and a first semicircular groove perpendicular to the first semicircular cavity on the fitting surface; the second shell is provided with a second semicircular cavity running through the length direction and a second semicircular groove perpendicular to the second semicircular cavity on the fitting surface; the first semicircular cavity and the second semicircular cavity are butted together to form a cavity inside the connecting shell 1; the first semicircular groove and the second semicircular groove are butted together to form a circular groove.

[0050] The assembled joint 2 has the ability to withstand tension and pressure, and can connect adjacent segments to ensure tight connection and overall stability between tunnel segments. Figure 8-Figure 10 , the fabricated joint 2 is divided into 4 parts, that is, 360° is divided into 4 parts, one part corresponds to 90°; the fabricated joint 2 has a rod-shaped structure, and the fabricated joint 2 includes a first section 21, a second section 22, a third section 23 and a fourth section 24 in the length direction. The first section 21 is a tip portion, and the structure of the tip portion is convenient for inserting the pipe segment, such as Fig.10 As shown, the end of the first section has an angle of 15°, the second section 22 and the fourth section 24 are rods and have the same diameter, the second section 22 can be made of steel to achieve snap-out, the diameter of the third section 23 is greater than the diameter of the second section 22, and the third section 23 can be made of steel to achieve a tensile effect, such as Fig.10 As shown, the second section 22 has a smaller diameter and enters the tube segment first. To facilitate the insertion of the thicker third section 23 into the tube segment, the third section 23 has a 15° bevel at one end close to the second section 22, forming a cone structure with a gradually increasing diameter. The fourth section 24 can be wrapped with polyamide on the outside to achieve a shear resistance effect.

[0051] In some embodiments, the first section 21 is exposed from the other end of the connecting shell 1, and part of the fourth section 24 is exposed from one end of the connecting shell 1. The exposed length is set according to actual conditions, and is generally 80 mm thick.

[0052] In some embodiments, the inner wall of the first shell 11 is provided with a first boss 12 at the other end, and the inner wall of the second shell is provided with a second boss at the other end, and the first boss 12 and the second boss are connected to form a circular hole, and the diameter of the circular hole is smaller than the diameter of the cavity; the size of the second section 22 of the assembled joint 2 matches the diameter of the cavity; the first boss 12 and the second boss block the second section 22 of the assembled joint 2 from passing through the other end of the connecting shell 1.

[0053] In some embodiments, corresponding mounting holes 13 are provided at four corners of the outer surfaces of the first shell 11 and the second shell, and fasteners pass through the mounting holes 13 to assemble the first shell 11 and the second shell to form the connection shell 1 .

[0054] The shape of the snap member 3 matches the inner wall of the connection shell 1. After the assembled joint 2 is fixed by snapping, the snap member 3 is tightly attached to the inner wall of the connection shell 1. The snap member 3 has the ability to withstand shear force. When the tunnel is subjected to shear force, it can effectively disperse and transmit these forces to protect the tunnel structure from damage. In some embodiments, the snap member 3 is an annular snap member, and the shape and size of the annular snap member match the circular groove; the outer surface of the snap member 3 is provided with an annular groove and an annular protrusion, and the annular protrusion serves as a shear block 31. The annular groove can be provided with one or two, and the elastic member 32 is located in the annular groove, such as Fig. 9 As shown, the groove is formed at an angle of 20°, which is convenient for arranging elastic parts such as springs on the outside. When the assembled joint 2 is inserted, it is opened by the elastic part 32, and after the second section 22 passes, it blocks the assembled joint 2 to achieve a tensile effect.

[0055] In some embodiments, the diameter of the fourth section 24 of the assembled joint 2 matches the diameter of the through hole, the snap member 3 can be placed in the connecting shell 1, and the snap member 3 is snapped to the end of the fourth section 24 close to the third section 23, and the inner diameter of the snap member 3 is equal to the outer diameter of the rod body.

[0056] In some embodiments, the elastic member 32 is a spring, and the spring is located on the outer periphery of the buckle 3. Specifically, the spring hoop is on the outer side of the buckle 3, and the buckle 3 is tightened. When the assembled joint 2 is inserted, the spring is expanded, and then after the thicker rod of the second section 22 enters, the spring rebounds and returns to its original state, thereby achieving locking.

[0057] The connection device in the above embodiment has a reliable locking mechanism through the cooperation between the connection shell 1, the assembled joint 2, and the buckle 3, thereby ensuring the safety and stability of the tunnel segment connection. The connection device adopts an assembled design, which is easy to install and disassemble, helps to reduce construction time and cost, and improves construction efficiency and quality.

[0058] The connecting device in the above-mentioned embodiment of the present invention has the dual functions of shear pins and bolts, integrating the advantages of the two connecting parts, and has the advantages of high strength, high stability and easy installation and disassembly. It can improve the safety, reliability and stability of the connection of shield tunnel segments, and can also greatly reduce the number of connecting parts between shield tunnel segments, simplify the installation process of the connecting parts, thereby improving the installation efficiency of the tunnel segments.

[0059] Based on the same concept, another embodiment of the present invention provides a tunnel segment structure, including a plurality of segments, wherein adjacent segments are connected by the segment connection device having both shear pin and bolt functions. Specifically, the segment connection device is pre-buried in the segment or inserted into the segment to achieve connection between adjacent segments.

[0060] In the tunnel segment structure, shear pins are mainly used to withstand shear forces and protect mechanical structures from damage by shear forces. When the shear forces exceed their design strength, the shear pins will shear off. Bolts are used to fasten and connect two or more parts to form an integral structure. The bolt connection method not only provides structural stability and reliability, but also allows disassembly and reinstallation when necessary. Bolts not only withstand shear forces, but also tension and pressure. In addition, bolts also need to have good fatigue resistance to ensure that they will not fail due to fatigue during long-term use. The above-mentioned embodiment of the present invention integrates shear pins and bolts to design a connection device that has both functions. The connection device combines the advantages of the two connectors, can improve the reliability and stability of the shield tunnel segment connection, and can adapt to shield tunnel segments of different diameters and shapes, and has strong adaptability.

[0061] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various modifications or variations within the scope of the claims, which does not affect the essence of the present invention. The above preferred features can be used in any combination without conflicting with each other.

Claims

1. A segment connection device having both shear pin and bolt functions, characterized in that: include: A connecting shell, wherein a cavity is provided inside the connecting shell and runs through the length direction, and a groove is provided at one end of the inner wall of the connecting shell and is perpendicular to the cavity; A snap fastener, the snap fastener is located in the groove, an elastic member is provided between the snap fastener and the connecting shell, and a through hole is provided at the center of the snap fastener; An assembled joint is inserted into the cavity of the connecting shell from one end of the connecting shell and passes through the through hole of the snap member, and both ends of the assembled joint are exposed from the connecting shell; the assembled joint and the snap member are snapped with each other.

2. The segment connection device having both shear pin and bolt functions according to claim 1, characterized in that: The connecting shell has a hollow cylindrical structure, and includes two shells with semicircular cross sections, namely a first shell and a second shell; The first shell is provided on the fitting surface with a first semicircular cavity running through the length direction and a first semicircular groove perpendicular to the first semicircular cavity; The second shell is provided on the fitting surface with a second semicircular cavity running through the length direction, and a second semicircular groove perpendicular to the second semicircular cavity; The first semicircular cavity and the second semicircular cavity are butted together to form a cavity inside the connecting shell; the first semicircular groove and the second semicircular groove are butted together to form a circular groove.

3. The segment connection device having both shear pin and bolt functions according to claim 2, characterized in that: The assembled joint has a rod-shaped structure, and includes a first section, a second section, a third section and a fourth section in sequence along the length direction, the first section is a tip portion, the second section has the same diameter as the fourth section, and the third section has a diameter greater than the second section.

4. The segment connection device having both shear pin and bolt functions according to claim 3, characterized in that: The first section is exposed from the other end of the connecting shell, and part of the fourth section is exposed from one end of the connecting shell.

5. The segment connection device having both shear pin and bolt functions according to claim 3, characterized in that: The inner wall of the first shell is provided with a first boss at the other end, and the inner wall of the second shell is provided with a second boss at the other end, the first boss and the second boss are butted together to form a circular hole, and the diameter of the circular hole is smaller than the diameter of the cavity; The size of the second section of the assembled joint matches the diameter of the cavity; the first boss and the second boss prevent the second section of the assembled joint from passing through the other end of the connecting shell.

6. The segment connection device having both shear pin and bolt functions according to claim 2, characterized in that: The outer surfaces of the first shell and the second shell are provided with corresponding mounting holes at four corners, and fasteners pass through the mounting holes to assemble the first shell and the second shell to form the connecting shell.

7. The segment connection device having both shear pin and bolt functions according to claim 2, characterized in that: The buckle is an annular buckle, and the shape and size of the annular buckle match the circular groove; An annular groove and an annular protrusion are provided on the outer surface of the buckle, the annular protrusion serves as a shear block, and the elastic member is located in the annular groove.

8. The segment connection device having both shear pin and bolt functions according to claim 3, characterized in that: The diameter of the fourth section of the assembled joint matches the diameter of the through hole, and the snap-fit ​​piece is snap-fitted to the end of the fourth section close to the third section.

9. The segment connection device with both shear pin and bolt functions according to claim 1, characterized in that: The elastic member is a spring, and the spring is located at the outer periphery of the buckle member.

10. A tunnel segment structure, comprising a plurality of segments, characterized in that: The adjacent segments are connected by a segment connection device having both shear pin and bolt functions as described in any one of claims 1 to 9.

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