A tunnel segment longitudinal connection socket joint

Abstract

This utility model relates to the field of longitudinal joint technology for tunnel segments, and discloses a socket-type joint for longitudinal connection of tunnel segments. The longitudinal joint body includes an outer sleeve, an inner sleeve, a reinforcing ring, and several retainers. The inner wall of the outer sleeve is fixedly connected to the outer side of the reinforcing ring, and the inner wall of the reinforcing ring is fixedly connected to the outer side of the inner sleeve. A central hole is provided at the center of the inner sleeve. The surface of the retainer is fixedly connected to the end face of the reinforcing ring. Through the provided splicing groove, slot, retainer, and retainer, the longitudinal joint body can quickly retain and position one end of the tunnel segment body, and facilitate the ring splicing of each tunnel segment body, thus improving the connection efficiency. Furthermore, the longitudinal joint body, composed of an outer sleeve, an inner sleeve, a reinforcing ring, and retainers, can increase the support strength at the connection position between the longitudinally connected tunnel segments, thereby greatly improving the support stability of the tunnel segment body.

Description

Technical Field

[0001] This utility model relates to the technical field of longitudinal joints for tunnel segments, specifically a socket-type joint for longitudinal connection of tunnel segments. Background Technology

[0002] The shield tunnel segments, as the permanent concrete lining structure of the shield tunnel, bear and resist soil pressure, groundwater pressure and other loads.

[0003] Currently, during the construction of tunnel segments, it is necessary to connect the tunnel segments longitudinally. However, common joint structures have low splicing efficiency and insufficient support stability. For example, a high-bearing-capacity shield tunnel segment joint structure disclosed in CN 216518034 U includes a segment body. The circumferential end face of the segment body is provided with a tenon, a mortise, and a limiting groove. Adjacent segments are connected in the circumferential direction through the tenon and mortise. The limiting groove is provided at the connection between the tenon and the mortise. The longitudinal end face of the segment body is provided with a limiting member, a male connector, and a female connector. The limiting member is connected to the limiting groove.

[0004] As can be seen from the above-mentioned disclosed scheme, when splicing the segment body, it is necessary to first enclose it, and then fix it with tenons and mortises. After that, the enclosed segment body is longitudinally connected to the fastener through the male connector. The splicing process is cumbersome and time-consuming, which reduces the splicing efficiency. Moreover, the segment bodies after longitudinal splicing are only pressure-bearing through the male connector, and their support stability may be insufficient, which cannot meet the needs of users. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a socket-type joint for longitudinal connection of tunnel segments, thereby solving the problems of low splicing efficiency and insufficient support stability of existing tunnel segments.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a socket-type joint for longitudinal connection of tunnel segments, comprising a longitudinal joint body, the longitudinal joint body including an outer sleeve, an inner sleeve, a reinforcing ring, and several retainers; the inner wall of the outer sleeve is fixedly connected to the outer side of the reinforcing ring, the inner wall of the reinforcing ring is fixedly connected to the outer side of the inner sleeve, a central hole is provided at the center of the inner sleeve, the surface of the retainer is fixedly connected to the end face of the reinforcing ring, a splicing groove is formed between the outer sleeve, the inner sleeve, and the reinforcing ring, and one end of the splicing groove is engaged with a tunnel segment connector. The tunnel segment body has several of the aforementioned mounting brackets located at the bottom of the splicing groove, with a slot surrounding two adjacent mounting brackets. Through the splicing groove, slot, mounting block, and mounting groove, the longitudinal connector body can quickly engage and position one end of the tunnel segment body. At the same time, it facilitates the circular splicing of each tunnel segment body, improving the connection efficiency. Furthermore, the longitudinal connector body is composed of an outer sleeve, an inner sleeve, a reinforcing ring, and mounting brackets, which can increase the support strength at the connection position between the longitudinally connected tunnel segment bodies, thereby greatly improving the support stability of the tunnel segment body.

[0007] Preferably, the card holder has symmetrical through holes on both sides, one end of each through hole is fixedly connected to an installation groove, the inner wall of the installation groove is movably connected to a spring, one end of each spring is fixedly connected to an anti-disengagement block, the spring has a compressive elastic force when squeezed by the anti-disengagement block, and allows the card block to extend and retract within the through hole.

[0008] Preferably, the cross-sectional shape of the tunnel segment body is arc-shaped, and symmetrical plug-in pieces are fixedly connected to both ends of the tunnel segment body. The surface of the plug-in piece is slidably connected to the inner wall of the slot. The plug-in piece and the slot facilitate the rapid positioning of the tunnel segment body and the longitudinal connector body.

[0009] Preferably, one end of the anti-detachment block is fixedly connected to a locking block, the surface of the locking block is slidably connected to the inner wall of the through hole, and one end of the locking block is provided with an inclined surface, which facilitates the locking block to be squeezed into the through hole when it is squeezed by the plug-in piece.

[0010] Preferably, sealing sheets are fixedly bonded to both sides of the tunnel segment body. The surface of the sealing sheet is provided with an adhesive layer. The sealing sheet is made of water-swellable rubber, which ensures the connection and sealing between two adjacent tunnel segment bodies.

[0011] Preferably, the side of the plug-in piece has symmetrical slots, and the inner wall of the slot is slidably connected to one end of the block. After the slot and the block are engaged, the longitudinal connection position of the tunnel segment body can be located.

[0012] Preferably, the spring is wavy in shape and made of elastic steel. The spring can automatically lock the locking block into the slot by compressing the elastic force.

[0013] Compared with the prior art, this utility model provides a socket joint for longitudinal connection of tunnel segments, which has the following advantages:

[0014] The design incorporates splicing slots, grooves, blocks, and slots, facilitating quick snap-fit ​​positioning of one end of the tunnel segment body by the longitudinal connector. This also enables the circular splicing of various tunnel segments, improving connection efficiency. Furthermore, the longitudinal connector body, composed of an outer sleeve, an inner sleeve, a reinforcing ring, and a mounting base, increases the support strength at the connection points between longitudinally connected tunnel segments, thereby significantly enhancing the support stability of the tunnel segments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the longitudinal connector body structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the tunnel segment body structure of this utility model;

[0018] Figure 4 yes Figure 2 A sectional view of the mounting structure of the card holder and its inner and outer connecting sleeves;

[0019] Figure 5 yes Figure 4 A sectional view of the card holder and card block installation structure.

[0020] In the diagram: 1. Longitudinal connector body; 11. Outer sleeve; 12. Inner sleeve; 13. Reinforcing ring; 14. Center hole; 15. Splicing groove; 16. Slot; 2. Card seat; 21. Mounting groove; 22. Card block; 23. Inclined surface; 24. Anti-detachment block; 25. Spring piece; 3. Tunnel segment body; 31. Insertion piece; 32. Card groove; 33. Sealing plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] This utility model provides a technical solution: a socket joint for longitudinal connection of tunnel segments. The tunnel segments are used in shield tunneling construction. The joint includes a longitudinal connector body 1, which comprises an outer sleeve 11, an inner sleeve 12, a reinforcing ring 13, and several retaining seats 2. These components facilitate the assembly and forming of the longitudinal connector body 1 and increase the support strength at the connection point of the longitudinally connected tunnel segment bodies 3. This prevents deformation of the cylindrical tunnel segment bodies 3 under pressure, while also avoiding deformation and cracking at the end joints of the longitudinally spliced ​​tunnel segment bodies 3. The inner wall of the outer sleeve 11 is fixed to the outer side of the reinforcing ring 13. The inner wall of the reinforcing ring 13 is fixedly connected to the outer side of the inner sleeve 12. The inner sleeve 12 has a central hole 14 at its center. The central hole 14 is used to reduce the weight of the joint or to reserve a grouting channel. The surface of the card seat 2 is fixedly connected to the end face of the reinforcing ring 13. The outer sleeve 11, the inner sleeve 12 and the reinforcing ring 13 enclose a splicing groove 15. The inner wall of the splicing groove 15 is movably connected to the surface of the tunnel segment body 3. Each tunnel segment body 3 has the same structure and can be inserted and fixed to the longitudinal connecting head body 1 without any order, which improves the assembly efficiency. One end of the splicing groove 15 is clamped to the tunnel segment body 3. Several card seats 2 are located at the bottom of the splicing groove 15, and a slot 16 is enclosed between two adjacent card seats 2.

[0023] The tunnel segment body 3 has an arc-shaped cross-section. Symmetrical plug-in pieces 31 are fixedly connected to both ends of the tunnel segment body 3. The surface of the plug-in piece 31 is slidably connected to the inner wall of the slot 16. The plug-in piece 31 and the slot 16 facilitate the quick positioning of the tunnel segment body 3 and the longitudinal connector body 1. Sealing pieces 33 are fixedly bonded to both sides of the tunnel segment body 3. The surface of the sealing piece 33 is provided with an adhesive layer. The adhesive layer is polyurethane adhesive, which has strong adhesion, good water resistance and flexibility, and is suitable for bonding rubber and concrete. The sealing piece 33 is made of water-swellable rubber, which ensures the sealing of the connection between two adjacent tunnel segment bodies 3. Symmetrical slots 32 are opened on the side of the plug-in piece 31. The inner wall of the slot 32 is slidably connected to one end of the locking block 22. After the slot 32 and the locking block 22 are engaged, the longitudinal connection position of the tunnel segment body 3 can be positioned.

[0024] The card holder 2 has symmetrical through holes on both sides. One end of the through hole is fixedly connected to the mounting groove 21. The inner wall of the mounting groove 21 is movably connected to the spring piece 25. One end of the spring piece 25 is fixedly connected to the anti-disengagement block 24. When the spring piece 25 is squeezed by the anti-disengagement block 24, it has the function of compression elasticity and allows the card block 22 to extend and retract within the through hole. One end of the anti-disengagement block 24 is fixedly connected to the card block 22. The surface of the card block 22 is slidably connected to the inner wall of the through hole. One end of the card block 22 is provided with an inclined surface 23. When the inclined surface 23 is squeezed by the insertion piece 31, it is easy to squeeze the card block 22 into the through hole. The spring piece 25 is wavy in shape and is made of elastic steel. The spring piece 25 can make the card block 22 automatically lock into the card groove 32 through compression elasticity.

[0025] The working principle of this device is as follows: During splicing, the insertion piece 31 at one end of the tunnel segment body 3 can be inserted into the slot 16 provided on the longitudinal connector body 1. After the insertion piece 31 enters the slot 16, it presses against the locking block 22, causing the locking block 22 to retract into the mounting groove 21 and press against the spring piece 25. This causes the spring piece 25 to generate a compressive force. When one end of the insertion piece 31 is inserted to the bottom of the slot 16, one end of the locking block 22 is aligned with the slot 32. At this time, the spring piece 25 releases its elastic force, which firmly locks one end of the locking block 22 into the slot 32. Then, each tunnel segment body 3 is inserted into each slot 16 according to the above method. After the insertion of the tunnel segment body 3 is completed, several tunnel segment bodies 3 are arranged into a cylindrical shape, and the splicing gap between two adjacent tunnel segment bodies 3 is sealed by the sealing plate 33. After completing the connection of one end of the tunnel segment body 3 to the longitudinal connector body 1, the other end of the tunnel segment body 3 is snapped into another longitudinal connector body 1. Then, the tunnel segment body 3 is installed according to the above method, thereby making the longitudinal connection of the tunnel segment body 3.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A socket-type joint for longitudinal connection of tunnel segments, comprising a longitudinal connector body (1), characterized in that: The longitudinal connector body (1) includes an outer sleeve (11), an inner sleeve (12), a reinforcing ring (13), and several card holders (2). The inner wall of the outer sleeve (11) is fixedly connected to the outer side of the reinforcing ring (13), and the inner wall of the reinforcing ring (13) is fixedly connected to the outer side of the inner sleeve (12). A central hole (14) is provided at the center of the inner sleeve (12). The surface of the card holder (2) is fixedly connected to the end face of the reinforcing ring (13). A splicing groove (15) is enclosed between the outer sleeve (11), the inner sleeve (12), and the reinforcing ring (13). A tunnel segment body (3) is clamped at one end of the splicing groove (15). Several card holders (2) are located at the bottom of the splicing groove (15), and a slot (16) is enclosed between two adjacent card holders (2).

2. The socket joint for longitudinal connection of tunnel segments according to claim 1, characterized in that: The card holder (2) has symmetrical through holes on both sides. One end of the through hole is fixedly connected to the mounting groove (21). The inner wall of the mounting groove (21) is movably connected to the spring piece (25). One end of the spring piece (25) is fixedly connected to the anti-detachment block (24).

3. The socket joint for longitudinal connection of tunnel segments according to claim 2, characterized in that: The tunnel segment body (3) has an arc-shaped cross section. Symmetrical plug-in pieces (31) are fixedly connected to both ends of the tunnel segment body (3). The surface of the plug-in piece (31) is slidably connected to the inner wall of the slot (16).

4. The socket joint for longitudinal connection of tunnel segments according to claim 3, characterized in that: One end of the anti-detachment block (24) is fixedly connected to a locking block (22), the surface of the locking block (22) is slidably connected to the inner wall of the through hole, and one end of the locking block (22) is provided with an inclined surface (23).

5. A socket joint for longitudinal connection of tunnel segments according to claim 1, characterized in that: Both sides of the tunnel segment body (3) are fixedly bonded with sealing sheets (33), the surface of the sealing sheet (33) is provided with an adhesive layer, and the sealing sheet (33) is made of water-swellable rubber.

6. A socket joint for longitudinal connection of tunnel segments according to claim 4, characterized in that: The side of the plug-in piece (31) has symmetrical slots (32), and the inner wall of the slots (32) is slidably connected to one end of the block (22).

7. A socket joint for longitudinal connection of tunnel segments according to claim 2, characterized in that: The spring piece (25) is wavy in shape and is made of elastic steel.

Images