High-strength anti-bending pipe piece annular rapid assembling and connecting component

Abstract

The utility model relates to a high-strength bending-resistant duct piece annular rapid assembling and connecting component which comprises a double-end C-shaped piece and a double-end T-shaped piece which are both fixed on a longitudinal joint splicing face of shield duct piece annular assembling. The double-end C-shaped piece and the double-end T-shaped piece are longitudinally and symmetrically arranged on the longitudinal seam splicing face on one side in the circumferential direction in a front-back mode, and the double-end C-shaped piece and the double-end T-shaped piece are longitudinally and symmetrically arranged on the longitudinal seam splicing face on the other side in the circumferential direction in a front-back mode; the double-end C-shaped piece is provided with two expanding grooves, the double-end T-shaped piece is provided with two expanding heads, the expanding heads are longitudinally inserted into the expanding grooves, the double-end C-shaped piece and the double-end T-shaped piece are connected in an inserted mode, and therefore the two annularly-adjacent shield segments are assembled into a whole. A group of double-end C-shaped pieces and double-end T-shaped pieces are symmetrically arranged on the end face of each longitudinal seam formed by annularly splicing the shield segments, and the double-end C-shaped pieces and the double-end T-shaped pieces are inserted in pairs and are symmetrically stressed, so that the force arm between a core concrete compression area and a connecting component when the connecting component is bent is increased, and the bending rigidity and the bearing capacity of the longitudinal seams of the segments are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of shield tunnel segment assembly technology, specifically to a high-strength, bending-resistant segment circumferential rapid assembly and connection component. Background Technology

[0002] Tunnel segments are crucial load-bearing components in shield tunnel construction, capable of withstanding external loads after the tunnel is operational. During construction, segments are spliced ​​together to form a ring, and the front and rear rings are assembled along the central axis to form the shield tunnel.

[0003] Traditional tunnel segment connections rely on bolts, which suffer from drawbacks such as poor connection accuracy, weak joint stiffness, and the weakening effect of bolt holes on the segment structure. To address these shortcomings, a new longitudinal joint connection technology for tunnel segments has emerged in recent years. This new technology improves segment assembly accuracy while enhancing the bending stiffness of the longitudinal joint, reducing lateral deformation during tunnel operation. The existing longitudinal joint connectors utilize pre-embedded C-shaped and T-shaped cast iron parts within the segments. For segments with pre-embedded C-shaped connectors, a groove is pre-drilled from the connector to the segment end. During on-site assembly, segments with pre-embedded T-shaped connectors are inserted longitudinally into the C-shaped connectors from the pre-drilled grooves in the previous segment to complete the assembly. C-type and T-type cast iron parts are generally arranged at the center of the tunnel segment width. When the tunnel segment is subjected to external loads, the longitudinal joint is in a state of compression and bending. When the longitudinal joint is eccentrically compressed, the core concrete area of ​​the joint surface is compressed and the connector is under tension. The connector arranged at the center of the tunnel segment thickness can provide a small torque. If a higher bending stiffness is required, the connector must have a large cross-sectional area. This results in a large amount of steel used in the connector, high cost, and difficulty in application and promotion.

[0004] Therefore, it is necessary to propose new measures to overcome the above-mentioned shortcomings. Summary of the Invention

[0005] The purpose of this invention is to provide a high-strength, quick-assembly connection component for circumferentially assembled pipe segments, in order to solve the problem that the bending resistance is relatively weak when C-shaped and T-shaped cast iron parts are arranged at the center of the pipe segment width.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A high-strength, bend-resistant tunnel segment circumferential rapid assembly connection component includes a double-headed C-shaped component and a double-headed T-shaped component, both fixed to the longitudinal joint splicing surface of the shield tunnel segment circumferential assembly; on one side of the circumferential longitudinal joint splicing surface, the double-headed C-shaped component and the double-headed T-shaped component are arranged symmetrically in front of and behind each other in the longitudinal direction, and on the other side of the circumferential longitudinal joint splicing surface, the double-headed C-shaped component and the double-headed T-shaped component are arranged symmetrically in front of and behind each other in the longitudinal direction;

[0008] The double-headed C-shaped component has two enlarged slots, and the double-headed T-shaped component has two enlarged heads. The enlarged heads are inserted longitudinally into the enlarged slots, so that the double-headed C-shaped component and the double-headed T-shaped component are interlocked, thereby assembling two adjacent shield tunnel segments into one unit.

[0009] Furthermore, the double-headed C-shaped component includes two C-shaped bodies, which are connected to each other by a C-shaped body connecting plate, and the enlarged groove is located in the C-shaped body and is arranged longitudinally.

[0010] Furthermore, an open guide groove is provided on the outer side of the enlarged groove, the guide groove is connected to the enlarged groove, and the inner diameter of the enlarged groove is larger than the inner diameter of the guide groove.

[0011] Furthermore, a C-shaped screw hole is provided on the circumferential side of the C-shaped body away from the guide groove. An anchor bar is screwed into the C-shaped screw hole and fixed to the longitudinal joint surface of the shield tunnel segment through the anchor bar.

[0012] Furthermore, the double-headed T-shaped component includes two T-shaped components, which are connected to each other by a T-shaped component connecting plate, and the enlarged head is located at the end of the T-shaped component.

[0013] Furthermore, a connecting rod is provided between the enlarged head and the T-shaped body, and the maximum width of the enlarged head is greater than the thickness of the connecting rod.

[0014] Furthermore, a T-shaped screw hole is provided on the circumferential side of the T-shaped component away from the enlarged head, and an anchor bar is screwed into the T-shaped screw hole and fixed to the longitudinal joint surface of the shield tunnel segment through the anchor bar.

[0015] Furthermore, the side of the enlarged groove closest to the guide groove is an inclined surface.

[0016] Furthermore, the side of the enlarged head corresponding to the inclined surface of the enlarged groove is also inclined.

[0017] Furthermore, the longitudinal joint surface of the shield tunnel segment circumferential assembly is pre-set with an assembly groove and an assembly boss. The assembly groove is arranged adjacent to the double-headed C-shaped component, and the assembly boss is arranged adjacent to the double-headed T-shaped component.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] This utility model provides a high-strength, high-bending-resistance circumferential rapid assembly connection component for tunnel segments. A set of double-headed C-shaped components and double-headed T-shaped components are symmetrically arranged on the end face of each longitudinal joint during the circumferential assembly of the tunnel segments. During circumferential splicing, they are inserted in pairs to form a symmetrical force-bearing structure at the longitudinal joint. This increases the lever arm between the core concrete compression zone and the connection component when the connection component is subjected to bending, thereby improving the bending stiffness of the longitudinal joint of the tunnel segment and increasing its bending load-bearing capacity. Attached Figure Description

[0020] 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 embodiments can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a longitudinal view of the tunnel segment.

[0022] Figure 2 yes Figure 1 View A in the diagram.

[0023] Figure 3 yes Figure 1 View B in the diagram.

[0024] Figure 4 This is a schematic diagram of the assembled groove.

[0025] Figure 5 This is a schematic diagram of the assembled boss.

[0026] Figure 6 This is a schematic diagram of the longitudinal joint of the tunnel segment.

[0027] Figure 7 This is a structural diagram of a double-headed C-shaped component.

[0028] Figure 8 yes Figure 7 Section II diagram.

[0029] Figure 9 yes Figure 7 Section II-II in the diagram.

[0030] Figure 10 yes Figure 7 The C-direction view in the image.

[0031] Figure 11 yes Figure 7 The view from direction D in the diagram.

[0032] Figure 12 This is a structural diagram of a double-headed T-shaped component.

[0033] Figure 13 yes Figure 12 The E-direction view in the image.

[0034] Figure 14 yes Figure 12 The F-direction view in the image.

[0035] Figure 15 This is a schematic diagram of a double-ended T-shaped part being inserted into a double-ended C-shaped part.

[0036] The diagram is labeled as follows:

[0037] 1-Double-headed C-shaped part, 2-Double-headed T-shaped part, 3-Anchor bar, 4-Longitudinal seam of segment, 5-Assembly groove, 6-Assembly boss, 7-Nitrile rubber cork force transmission pad, 8-T-shaped segment dividing surface;

[0038] 11-C-type screw hole, 12-enlarged groove, 13-guide groove, 14-C-shaped body, 15-C-shaped body connecting plate; 21-T-type screw hole, 22-enlarged head, 23-connecting rod, 24-T-type body, 25-T-type body connecting plate. Detailed Implementation

[0039] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0040] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "circumferential", "longitudinal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "setting," etc., should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] In a specific implementation, Figure 1 The direction from left to right in the middle is defined as the circumferential direction. Figure 2The direction from left to right in the middle is defined as the longitudinal direction.

[0043] The shield tunnel segments are prefabricated into an arc plate shape. Construction operations include circumferential and longitudinal splicing. Circumferential splicing involves longitudinal joints, while longitudinal splicing involves circumferential joints. This invention provides a high-strength, bending-resistant, circumferentially rapid assembly connection component for shield tunnel segments, used for assembling two adjacent circumferentially shaped shield tunnel segments. Rapid assembly is achieved through longitudinal sliding, resulting in high efficiency and high assembly accuracy.

[0044] Specifically, such as Figure 1-3 The components include double-headed C-shaped parts 1 and double-headed T-shaped parts 2, both fixed to the longitudinal joint surface of the shield tunnel segments during circumferential assembly. On one side of the circumferential longitudinal joint surface, the double-headed C-shaped parts 1 and double-headed T-shaped parts 2 are arranged symmetrically, one in front of the other, while on the other side, they are arranged symmetrically, one in front of the other. The double-headed C-shaped parts 1 and double-headed T-shaped parts 2 on both sides of the same shield tunnel segment are staggered left and right. When assembling two adjacent circumferential shield tunnel segments, their double-headed C-shaped parts 1 and double-headed T-shaped parts 2 interlock. Figure 6 The double-headed C-shaped component 1 has two enlarged slots 12, and the double-headed T-shaped component 2 has two enlarged heads 22. The enlarged heads 22 are inserted longitudinally into the enlarged slots 12, so that the double-headed C-shaped component 1 and the double-headed T-shaped component 2 are interlocked, thereby assembling two adjacent shield tunnel segments in the circumferential direction into one.

[0045] like Figure 4-5 The longitudinal joint surface of the shield tunnel segment circumferential assembly is pre-set with assembly groove 5 and assembly boss 6. The assembly groove 5 is arranged adjacent to the double-headed C-shaped component 1, and the assembly boss 6 is arranged adjacent to the double-headed T-shaped component 2.

[0046] like Figure 7-11 The double-headed C-shaped component 1 includes two identical C-shaped bodies 14, which are connected to each other by a C-shaped body connecting plate 15. An enlarged groove 12 is located on the C-shaped body 14 and is arranged longitudinally. An open guide groove 13 is provided on the circumferential outer side of the enlarged groove 12, communicating with the enlarged groove 12. The inner diameter of the enlarged groove 12 is larger than the inner diameter of the guide groove 13. A C-shaped screw hole 11 is provided on the circumferential side of the C-shaped body 14 away from the guide groove 13. An anchor bar 3 is screwed into the C-shaped screw hole 11 and fixed to the longitudinal joint surface of the shield tunnel segment through the anchor bar 3.

[0047] like Figure 12-14The double-headed T-shaped component 2 comprises two identical T-shaped bodies 24, which are connected to each other by a T-shaped body connecting plate 25. An enlarged head 22 is located at the end of each T-shaped body 24. The external dimensions of the enlarged head 22 match the internal dimensions of the enlarged groove 12. A connecting rod 23 is provided between the enlarged head 22 and the T-shaped body 24, with the outer diameter of the enlarged head 22 being larger than the outer diameter of the connecting rod 23. A T-shaped screw hole 21 is provided on the circumferential side of the T-shaped body 24 away from the enlarged head 22. An anchor bar 3 is screwed into the T-shaped screw hole 21 and fixed to the longitudinal joint surface of the shield tunnel segment through the anchor bar 3.

[0048] like Figure 15 The side of the enlarged groove 12 closest to the guide groove 13 is inclined, and the side of the enlarged head 22 corresponding to the inclined side of the enlarged groove 12 is also inclined, with the same degree of inclination, preferably 3.81°. The design of the inclined surface can make the width of the longitudinal joint of the pipe segment gradually decrease, and the waterproof sealing gasket of the longitudinal joint is gradually pressed during the pipe segment assembly process to achieve the effect of waterproof sealing.

[0049] When adjacent shield tunnel segments are assembled at the longitudinal joint, the double-headed T-shaped piece 2 of the next segment to be assembled slides longitudinally into the double-headed C-shaped piece 1 until it contacts the bottom of the enlarged head 22 and the enlarged groove 12, at which point the assembly is complete. At this point, the segment assembly groove 5 and the assembly boss 6 interlock. The thickness of the enlarged head 22 and the opening width of the enlarged groove 12 are both gradually changing. When the T-shaped piece 24 and the C-shaped piece 14 just overlap, the narrowest part of the enlarged head 22 enters the widest part of the opening of the enlarged groove 12, which maximizes the allowable construction error. The T-shaped piece 24 gradually slides into the C-shaped piece 14. When the assembly is complete, the narrowest part of the opening of the enlarged groove 12 locks into the narrowest part of the enlarged head 22, and the widest part of the opening of the enlarged groove 12 locks into the widest part of the enlarged head 22. This facilitates the segment assembly construction while minimizing the joint assembly error and misalignment of the segments.

[0050] The connecting components of this invention can be made of cast iron or cast steel. Compared to the currently used single-row CT connecting components, the longitudinal joint of the segment composed of this double-headed connecting component can reduce the amount of steel used in the connecting components by 30% while increasing the bending stiffness of the joint by 2 to 4 times, saving costs while improving the bending capacity of the longitudinal joint. The setting of the assembly boss 6 reduces the weakening of the concrete compression zone of the segment longitudinal joint, further improving the bending performance of the segment longitudinal joint.

[0051] Meanwhile, this rapid assembly connection component for longitudinal joints of pipe segments with high bending strength increases the lever arm between the core concrete compression zone and the connector when the longitudinal joint is subjected to bending by setting up double-row longitudinal joint connection components, thereby improving the bending stiffness of the longitudinal joint of the pipe segments and increasing the bending bearing capacity of the longitudinal joint of the pipe segments; the special structural design can greatly reduce the misalignment of the longitudinal joints of the assembled pipe segments while having a large construction tolerance.

[0052] In addition, the aforementioned features of this connecting device provide high bending resistance for the longitudinal joints of the tunnel segments, which can greatly reduce the lateral convergence of the shield tunnel. At the same time, the misalignment of the tunnel segments is small, the forming quality of the shield tunnel is high, and the leakage is low. It has good mechanical properties, high stiffness, and low cost compared with the longitudinal joint quick connectors already in use. It can be used when the shield tunnel segments are subjected to large bending moments and small axial forces.

[0053] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A high-strength, bend-resistant, circumferentially rapid assembly and connection component for pipe segments, characterized in that: The components include a double-headed C-shaped component (1) and a double-headed T-shaped component (2), both of which are fixed on the longitudinal joint splicing surface of the shield tunnel segments in the circumferential assembly. On the longitudinal joint splicing surface on one side of the circumference, the double-headed C-shaped component (1) and the double-headed T-shaped component (2) are arranged symmetrically in the longitudinal direction, one in front and one behind. On the longitudinal joint splicing surface on the other side of the circumference, the double-headed C-shaped component (1) and the double-headed T-shaped component (2) are arranged symmetrically in the longitudinal direction, one in front and one behind. The double-headed C-shaped component (1) has two enlarged slots (12), and the double-headed T-shaped component (2) has two enlarged heads (22). The enlarged heads (22) are inserted longitudinally into the enlarged slots (12), so that the double-headed C-shaped component (1) and the double-headed T-shaped component (2) are interlocked, thereby assembling two adjacent shield tunnel segments into one unit.

2. The high-strength, bending-resistant segment circumferential rapid assembly connection component according to claim 1, characterized in that: The double-headed C-shaped component (1) includes two C-shaped components (14), which are connected to each other by a C-shaped component connecting plate (15). The enlarged groove (12) is located on the C-shaped component (14) and is arranged longitudinally.

3. The high-strength, bending-resistant segment circumferential rapid assembly connection component according to claim 2, characterized in that: An open guide groove (13) is provided on the outer side of the enlarged groove (12), the guide groove (13) is connected to the enlarged groove (12), and the inner diameter of the enlarged groove (12) is larger than the inner diameter of the guide groove (13).

4. The high-strength, bending-resistant segment circumferential rapid assembly connection component according to claim 3, characterized in that: A C-shaped screw hole (11) is provided on the circumferential side away from the guide groove (13) of the C-shaped body (14). An anchor bar (3) is screwed into the C-shaped screw hole (11) and fixed to the longitudinal joint surface of the shield tunnel segment through the anchor bar (3).

5. A high-strength, bend-resistant, circumferentially rapid assembly and connection component for tubular segments according to claim 4, characterized in that: The double-headed T-shaped component (2) includes two T-shaped components (24), which are connected to each other by a T-shaped component connecting plate (25), and the enlarged head (22) is located at the end of the T-shaped component (24).

6. A high-strength, bend-resistant, circumferentially rapid assembly and connection component for pipe segments according to claim 5, characterized in that: A connecting rod (23) is provided between the enlarged head (22) and the T-shaped body (24), and the maximum width of the enlarged head (22) is greater than the thickness of the connecting rod (23).

7. A high-strength, bend-resistant, circumferentially rapid assembly and connection component for tubular segments according to claim 6, characterized in that: The T-shaped body (24) is provided with a T-shaped screw hole (21) on the circumferential side away from the enlarged head (22). An anchor bar (3) is screwed into the T-shaped screw hole (21) and fixed to the longitudinal joint surface of the shield tunnel segment through the anchor bar (3).

8. A high-strength, bend-resistant, circumferentially rapid assembly and connection component for tubular segments according to claim 7, characterized in that: The side of the enlarged groove (12) near the guide groove (13) is inclined.

9. A high-strength, bend-resistant, circumferentially rapid assembly and connection component for pipe segments according to claim 8, characterized in that: The enlarged head (22) is also inclined on one side of the inclined surface of the enlarged groove (12).

10. A high-strength, bend-resistant, circumferentially rapid assembly and connection component for tubular segments according to claim 9, characterized in that: The longitudinal joint surface of the shield tunnel segment circumferential assembly is pre-set with an assembly groove (5) and an assembly boss (6). The assembly groove (5) is arranged adjacent to the double-headed C-shaped component (1), and the assembly boss (6) is arranged adjacent to the double-headed T-shaped component (2).

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