Quick connection structure of shield segment

Abstract

The utility model discloses a shield segment quick connection structure, including the segment main part, the one side of segment main part is provided with the butt -joint subassembly, the butt -joint subassembly includes T shaped lug, T shaped lug fixedly connected in the one side of segment main part, the inside of the other side of segment main part is provided with T shaped sliding slot, one end of segment main part is fixedly connected with the plug -in rod, the inside of the other end of segment main part is provided with the insertion hole, the utility model relates to shield tunnel technical field, the shield segment quick connection structure adopts the " first circumferential ring, laterally extends " the assembling process of, avoids the mutual interference of annular and longitudinal splicing, and the sliding fit of T shaped lug and T shaped sliding slot provides the accurate orientation for the same ring segment, and the plug -in cooperation of plug -in rod and insertion hole ensures that the adjacent ring segment is positioned fast, and the adjustment time is reduced greatly, and the construction efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of shield tunnel technology, specifically a rapid connection structure for shield tunnel segments. Background Technology

[0002] With the accelerated development of urban underground space, small tunnel boring machines (TBMs) with a diameter of less than 3 meters are increasingly widely used in municipal pipeline networks, cable tunnels, and other projects. Globally, 80% of TBMs in use are small devices with a diameter of less than 5 meters; projects such as the Bangkok sewage pipe project in Thailand utilize 2.25-meter-class TBMs. Segment connection, as a critical construction step, directly affects project efficiency and structural safety.

[0003] The patent publication number "CN221609990U" discloses a "Connection Structure for Rapidly Assembled Shield Tunnel Segments," which includes a segment body. Each segment body has a slot on one side and a locking post on the other side. A locking strip is fixed to the top of the segment body, and a docking groove is provided at the bottom. A reinforcing plate is installed inside the recessed groove, and positioning bolts are installed at both ends of the reinforcing plate. This invention uses the reinforcing plate to engage the locking strip inside the docking groove, allowing two sets of segment bodies to be joined together. After assembly, the reinforcing plate is removed and placed inside the recessed groove. Then, the positioning bolts are passed through the reinforcing plate and installed inside the positioning holes, thus fixing the reinforcing plate inside the recessed groove. The reinforcing plate is located at the joint of the two sets of segment bodies, ensuring the stability of the joint, preventing detachment, and guaranteeing the tightness of the segment connection.

[0004] The device works by inserting a locking pin into a slot, which in turn compresses a stop block. The stop block then compresses a spring and a telescopic rod, causing the stop block to extend inward. When the locking pin is fully inserted into the slot, the stop block presses against the inside of the slot, securing the locking strip inside the mating groove. This allows the two sets of tube segments to be joined together. However, this design has a drawback: once the locking pin is fully inserted into the slot, it cannot be effectively pulled out. This makes it more difficult to adjust or disassemble the tube segments later if other issues arise.

[0005] To address these issues, this invention provides a quick connection structure for tunnel segments. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a quick connection structure for tunnel segments, thus solving the aforementioned problems.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a quick connection structure for tunnel segments, comprising a segment body, a docking assembly on one side of the segment body, the docking assembly including a T-shaped protrusion fixedly connected to one side of the segment body, a T-shaped groove inside the other side of the segment body, an insertion rod fixedly connected to one end of the segment body, and an insertion hole inside the other end of the segment body.

[0008] Furthermore, the T-shaped groove and the T-shaped protrusion are the same size, and the T-shaped protrusion on another segment body is slidably connected to the interior of the T-shaped groove on the segment body.

[0009] By adopting the above technical solution, smooth sliding and no radial clearance are ensured.

[0010] Furthermore, the insertion rod is the same size as the insertion hole, and the insertion rod on another segment body can be inserted into the insertion hole on that segment body.

[0011] By adopting the above technical solution, the coaxiality of the lateral connection is guaranteed.

[0012] Furthermore, there are two insertion rods and two insertion holes, both of which are symmetrical to the horizontal center line of the main body of the tube segment.

[0013] By adopting the above technical solution, the lateral force is evenly transmitted, avoiding stress cracking at the connection points due to force concentration.

[0014] Furthermore, circumferential reinforcing grooves are formed on both sides of the inner wall of the segment body, and arc-shaped reinforcing plates are inserted into the inside of the circumferential reinforcing grooves. The docking assembly also includes a first reinforcing bolt, which is threadedly connected to the arc-shaped reinforcing plate and the internal structure of the segment body.

[0015] By adopting the above technical solution, the structural strength of the circumferential splicing is enhanced.

[0016] Furthermore, the inner wall of the segment body is provided with transverse reinforcing grooves at both ends, and rectangular reinforcing plates are inserted into the transverse reinforcing grooves. The docking assembly also includes a second reinforcing bolt, which is threadedly connected to the rectangular reinforcing plate and the internal structure of the segment body.

[0017] By adopting the above technical solution, the structural strength of the horizontal splicing is enhanced.

[0018] Furthermore, the insertion rod is made of steel, and the T-shaped protrusion and the main body of the pipe segment are integrally cast from high-strength impermeable concrete.

[0019] By adopting the above technical solutions, the insertion rod is made of alloy steel, which has high strength and fatigue resistance, and the main body of the segment is integrally cast with high-strength impermeable concrete, which can improve the strength.

[0020] Beneficial effects

[0021] This utility model provides a quick connection structure for tunnel boring machine segments. Compared with the prior art, it has the following advantages:

[0022] 1. This shield tunnel segment quick connection structure adopts an assembly process of "first forming a ring around the circumference, then extending laterally" to avoid mutual interference between circumferential and longitudinal splicing. The sliding cooperation of T-shaped protrusions and T-shaped grooves provides precise guidance for segments in the same ring, and the insertion cooperation of insertion rods and insertion holes ensures rapid positioning of adjacent ring segments, greatly reducing adjustment time and improving construction efficiency.

[0023] 2. This shield tunnel segment quick connection structure eliminates the irreversible connection of "clamping post-clamping groove" and achieves connection and reinforcement through bolt-fixed reinforcing plates. When adjustment is needed, the segments can be slid or pulled out simply by loosening the bolts, without damaging the segment structure. This effectively solves the problem of difficult structural disassembly and reduces rework costs caused by positioning deviations. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a perspective view of the external structure of this utility model;

[0026] Figure 2 This is a side view of the horizontal splicing structure of this utility model;

[0027] Figure 3 This is an enlarged view of the structure at point A of this utility model;

[0028] Figure 4 This is a side view of the circumferential splicing structure of this utility model;

[0029] Figure 5 This is a side view of the circumferential and transverse splicing of the structure of this utility model.

[0030] In the figure: 1. Main body of the segment; 2. Connecting assembly; 21. T-shaped protrusion; 22. T-shaped groove; 23. Insert rod; 24. Insertion hole; 25. Circumferential reinforcing groove; 26. Arc-shaped reinforcing plate; 27. First reinforcing bolt; 28. Transverse reinforcing groove; 29. ​​Rectangular reinforcing plate; 210. Second reinforcing bolt. Detailed Implementation

[0031] It should be noted that in the description of the embodiments of this application, the terms "front," "rear," "left," "right," "up," "down," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are 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 orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0032] The present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0033] Reference Figures 1 to 5 This application provides a quick connection structure for tunnel segments, including a segment body 1, and a docking component 2 is provided on one side of the segment body 1.

[0034] The docking assembly 2 includes a T-shaped protrusion 21, which is fixedly connected to one side of the segment body 1. The T-shaped protrusion 21 and the segment body 1 are integrally cast from high-strength impermeable concrete. During the casting process, a steel mold is used for positioning to ensure that the axis of the T-shaped protrusion 21 is parallel to the circumferential axis of the segment body 1, and the top surface of the T-shaped protrusion 21 is flush with the end face of the segment body 1. A T-shaped groove 22 is provided inside the other side of the segment body 1. The T-shaped groove 22 has the same size as the T-shaped protrusion 21 and is formed by CNC milling to reduce the sliding resistance during assembly. The T-shaped protrusion 21 on another segment body 1 is slidably connected to the inside of the T-shaped groove 22 on the segment body 1. During assembly, the radial propulsion mechanism of the segment assembly machine can be used to push the T-shaped protrusion 21 to slide along the T-shaped groove 22 to achieve circumferential docking of the same ring segment.

[0035] One end of the segment body 1 is fixedly connected to a plug rod 23. The plug rod 23 is made of alloy steel, which is forged, machined and then heat-treated, and the surface is treated with anti-rust treatment to improve its anti-rust performance. The other end of the segment body 1 has an insertion hole 24. The plug rod 23 and the insertion hole 24 are the same size. A steel sleeve is pre-embedded inside the insertion hole 24. The steel sleeve is connected to the segment body 1 by a pre-embedded steel bar to prevent the insertion hole 24 from cracking during insertion and removal. There are two plug rods 23 and two insertion holes 24, both of which are symmetrical with the horizontal center line of the segment body 1 to ensure lateral force balance.

[0036] The inner wall of the segment body 1 has circumferential reinforcing grooves 25 on both sides. The groove openings of the circumferential reinforcing grooves 25 are rounded. An arc-shaped reinforcing plate 26 is inserted into the circumferential reinforcing groove 25. The arc-shaped reinforcing plate 26 is made of steel plate and its curvature matches the curvature of the inner wall of the segment body 1. The docking assembly 2 also includes a first reinforcing bolt 27. The first reinforcing bolt 27 is a high-strength bolt. The first reinforcing bolt 27 is threadedly connected to the arc-shaped reinforcing plate 26 and the internal threads of the segment body 1. The segment body 1 has pre-set bolt holes inside, and the holes are coated with sealant to ensure the connection is sealed.

[0037] The inner wall of the segment body 1 has transverse reinforcement grooves 28 at both ends, and rubber sealing gaskets are installed in the grooves to improve the waterproof performance of the splice joints. Rectangular reinforcement plates 29 are inserted into the transverse reinforcement grooves 28. The rectangular reinforcement plates 29 are made of composite materials. The docking assembly 2 also includes a second reinforcement bolt 210. The specifications of the second reinforcement bolt 210 are the same as those of the first reinforcement bolt 27. The second reinforcement bolt 210 is connected to the internal threads of the rectangular reinforcement plate 29 and the segment body 1. The bolt holes on the rectangular reinforcement plate 29 are countersunk holes to avoid the bolt heads protruding and affecting the flatness of the tunnel inner wall.

[0038] All electrical devices in this plan are powered by an external power source.

[0039] Working principle: During construction, the circumferential splicing of the same ring segments is first carried out: the segment assembly machine of the tunnel boring machine hoists a single segment body 1 to the designated position, adjusts the angle so that the T-shaped protrusion 21 on one side of the segment body 1 is aligned with the T-shaped sliding groove 22 of the installed segment body 1, and pushes the segment body 1 so that the T-shaped protrusion 21 slides along the T-shaped sliding groove 22 until the circumferential end faces of the two segment bodies 1 are tightly fitted. This operation is repeated to install the remaining segment bodies 1 in the same ring until the last segment body 1 is connected to the first segment body 1 to form a complete ring. Then, the arc-shaped reinforcing plate 26 is inserted into the circumferential reinforcing groove 25, and the arc-shaped reinforcing plate 26 is fixed to the segment body 1 with the first reinforcing bolt 27 to complete the circumferential reinforcement.

[0040] After the entire ring segment is assembled circumferentially, the adjacent ring segments are then joined laterally: the tunnel boring machine's advancing posture is adjusted so that the insertion rod 23 of the current ring segment body 1 is aligned with the insertion hole 24 of the previous ring segment body 1. The current ring segment is then pushed forward as a whole, so that the insertion rod 23 is inserted into the insertion hole 24 until the longitudinal end faces of the two ring segments are in contact. Next, the rectangular reinforcing plate 29 is inserted into the transverse reinforcing groove 28 and fixed with the second reinforcing bolt 210 to achieve transverse reinforcement.

[0041] By repeating the above process, continuous assembly of tunnel segments can be achieved. If the position of a segment needs to be adjusted, simply loosen the corresponding reinforcing bolt, remove the reinforcing plate, slide along the T-shaped groove 22 to adjust the segment in the same ring, or pull out the insertion rod 23 to adjust the segment in the adjacent ring. After adjustment, re-fix it.

[0042] During the tunnel operation phase, the T-shaped protrusion 21 and the T-shaped groove 22 work together to transmit the radial force of the same ring segment, the insertion rod 23 and the insertion hole 24 work together to transmit the longitudinal force of the adjacent ring, and the arc-shaped reinforcing plate 26 and the rectangular reinforcing plate 29 further enhance the overall rigidity to ensure the stability of the tunnel structure under long-term ground pressure.

[0043] 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 process, method, article, or apparatus.

[0044] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rapid connection structure for tunnel segments, comprising a segment body (1), characterized in that: A docking assembly (2) is provided on one side of the segment body (1). The docking assembly (2) includes a T-shaped protrusion (21). The T-shaped protrusion (21) is fixedly connected to one side of the segment body (1). A T-shaped groove (22) is opened inside the other side of the segment body (1). A plug rod (23) is fixedly connected to one end of the segment body (1). A plug hole (24) is opened inside the other end of the segment body (1).

2. The shield tunnel segment quick connection structure according to claim 1, characterized in that: The T-shaped groove (22) is the same size as the T-shaped protrusion (21), and the T-shaped protrusion (21) on another tube body (1) is slidably connected to the inside of the T-shaped groove (22) on the tube body (1).

3. The shield tunnel segment quick connection structure according to claim 1, characterized in that: The insertion rod (23) is the same size as the insertion hole (24), and the insertion rod (23) on another tube body (1) can be inserted into the insertion hole (24) on the tube body (1).

4. The shield tunnel segment quick connection structure according to claim 1, characterized in that: There are two insertion rods (23) and two insertion holes (24), both of which are symmetrical to the horizontal midline of the main body (1).

5. The shield tunnel segment quick connection structure according to claim 1, characterized in that: The inner wall of the segment body (1) is provided with circumferential reinforcing grooves (25) on both sides. An arc-shaped reinforcing plate (26) is inserted into the circumferential reinforcing groove (25). The docking assembly (2) also includes a first reinforcing bolt (27), which is threadedly connected to the arc-shaped reinforcing plate (26) and the internal threads of the segment body (1).

6. The shield tunnel segment quick connection structure according to claim 1, characterized in that: The inner wall of the segment body (1) is provided with transverse reinforcing grooves (28) at both ends. A rectangular reinforcing plate (29) is inserted into the transverse reinforcing groove (28). The docking assembly (2) also includes a second reinforcing bolt (210). The second reinforcing bolt (210) is threadedly connected to the rectangular reinforcing plate (29) and the internal threads of the segment body (1).

7. The shield tunnel segment quick connection structure according to claim 1, characterized in that: The insertion rod (23) is made of steel, and the T-shaped protrusion (21) and the main body of the pipe segment (1) are integrally cast from high-strength impermeable concrete.

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