Shield segment joint

Abstract

The utility model discloses a shield segment joint, including an integrally formed steel bar skeleton, the steel bar skeleton including two opposite arc-shaped receiving plates and a plurality of support rods connected between the two arc-shaped receiving plates; a concrete coating layer is also cast between the two arc-shaped receiving plates, the concrete coating layer covers the plurality of support rods, the steel bar skeleton and the concrete coating layer constitute the shield segment joint; in the two arc-shaped receiving plates: the outer wall of one of the arc-shaped receiving plates is provided with at least one clamping joint, and the outer wall of the remaining arc-shaped receiving plate is provided with at least one concave clamping groove, when any two of the shield segment joints are connected to each other, the clamping joint of one of the shield segment joints can be clamped with the concave clamping groove of the remaining shield segment joint. The utility model is convenient, fast, and stable to connect, and has high strength, stability, and safety.

Description

Technical Field

[0001] The utility model relates to the technical field of shield tunnels, in particular to a shield segment joint. Background Art

[0002] The shield method is widely used in the construction of tunnels for urban subways, municipal pipelines, railways, highways, etc. It has the advantages of high efficiency, safety, and little impact on the surrounding environment. Tunnels constructed using the shield method usually require segmental structures for lining. The shield tunnel lining structure refers to the segments prefabricated on site or in factories that are spliced ​​together with bolts to form an integral pipeline structure. It has the functions of enhancing the overall stability of the tunnel, and preventing waterproofing and seepage.

[0003] In the prior art, most segment structures are connected by bolts, which not only needs to consider the error problem of docking, but also most of the bolts are bent bolts, which are troublesome to connect, slow down the tunnel construction, and because of the stress concentration problem, the segment joints are very easy to be damaged and cracked, which leads to the reduction of the overall strength of the segment structure and the decrease of waterproofness, which is not conducive to the rapid construction and safe use of the tunnel. Utility Model Content

[0004] The utility model aims to provide a shield segment joint, which is convenient, fast and stable to connect and has high strength, stability and safety.

[0005] The purpose of the utility model is mainly achieved through the following technical solutions: a shield segment joint, including an integrally formed steel frame, the steel frame including two opposite arc-shaped receiving plates and a plurality of support rods connected between the two arc-shaped receiving plates; a concrete covering layer is also cast between the two arc-shaped receiving plates, the concrete covering layer covers a plurality of support rods, and the steel frame and the concrete covering layer constitute the shield segment joint; among the two arc-shaped receiving plates: the outer side wall of one of the arc-shaped receiving plates is provided with at least one clamping joint, and the outer side wall of the remaining arc-shaped receiving plate is provided with at least one concave clamping groove, when any two of the shield segment joints are connected to each other, the clamping joint of one of the shield segment joints can be clamped with the concave clamping groove of the remaining shield segment joint.

[0006] Based on the above technical solution, the outer walls of the two arc-shaped connecting plates with the card joints or the concave card grooves are provided with waterproof grooves; the waterproof grooves are arranged along the curvature direction of the arc-shaped connecting plates; the outer walls of each arc-shaped connecting plate are provided with two waterproof grooves, and the card joints or the concave card grooves are located between the two waterproof grooves.

[0007] Based on the above technical solution, a strip-shaped waterproof bag is installed in the waterproof groove; the strip-shaped waterproof bag is composed of a water-soluble film and expansive soil coated in the water-soluble film.

[0008] Based on the above technical solution, the clamping joint is a cylindrical structure, the end of the clamping joint is concave to form a socket, two through holes are evenly distributed in the circumferential direction of the clamping joint, the two through holes are connected to the socket, and two clamping blocks are interference fit in the two through holes; the concave clamping groove is a countersunk hole structure, and the aperture of the countersunk hole structure gradually increases from its hole mouth to the hole; a conical top block is provided in the middle position of the bottom of the concave clamping groove, and the conical top block can be extended into the socket and push the two clamping blocks partially out to the through hole; an annular clamping groove is provided on the bottom circumference of the concave clamping groove, and the clamping block part can be inserted into the annular clamping groove after being pushed out to the through hole.

[0009] Based on the above technical solution, the two clamping blocks have a wedge-shaped structure on one side facing the jack; an annular step groove is also provided on the circumference of the conical top block, and when the clamping joint is clamped with the concave clamping groove, the wedge-shaped structure is clamped in the annular step groove.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model utilizes a steel skeleton structure to construct the segment structure, which can improve its overall structural strength, and has high compression and bending resistance during subsequent use. After connection, the segment joints are not easy to deform, have good stability and can ensure waterproof effect. At the same time, a quick snap-in connection between the segment joints is achieved by matching the snap joint and the concave snap groove. The connection is quick and convenient, and after snap-in, the segment joints can be firmly connected in both axial and radial directions, with high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:

[0012] Figure 1 It is a structural schematic diagram of the shield segment joint;

[0013] Figure 2 It is a schematic diagram of the structure of the steel skeleton;

[0014] Figure 3 It is a partial structural cross-sectional view of the shield segment joint;

[0015] Figure 4 It is a schematic diagram of the connection structure of the shield segment joint;

[0016] The numbers in the figure represent:

[0017] 1. Steel skeleton; 2. Arc-shaped receiving plate; 3. Support rod; 4. Concrete covering layer; 5. Card joint; 6. Concave card slot; 7. Waterproof groove; 8. Socket; 9. Through hole; 10. Card block; 11. Conical top block; 12. Annular card slot; 13. Annular step groove. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0019] like Figure 1-Figure 4 As shown, an embodiment of the utility model provides a shield segment joint, including an integrally formed steel skeleton 1, the steel skeleton 1 including two opposite arc-shaped receiving plates 2 and a plurality of support rods 3 connected between the two arc-shaped receiving plates 2; a concrete covering layer 4 is also cast between the two arc-shaped receiving plates 2, the concrete covering layer 4 covers the plurality of support rods 3, and the steel skeleton 1 and the concrete covering layer 4 constitute the shield segment joint; among the two arc-shaped receiving plates 2: the outer wall of one of the arc-shaped receiving plates 2 is provided with at least one clamping joint 5, and the outer wall of the remaining arc-shaped receiving plate 2 is provided with at least one concave clamping groove 6, when any two of the shield segment joints are connected to each other, the clamping joint 5 of one of the shield segment joints can be clamped with the concave clamping groove 6 of the remaining shield segment joint.

[0020] When used, after the steel skeleton 1 is integrally formed, a concrete covering layer 4 can be formed by concrete pouring, which constitutes the shield segment joint as a whole. During pouring, the inner and outer arc surfaces of the concrete covering layer 4 are flush with the inner and outer arc surfaces of the arc-shaped receiving plate 2, and the remaining two side cross-sections of the concrete covering layer 4 are also flush with the opposite sides of the arc-shaped receiving plate 2, thereby forming a continuous and flat shield segment joint. When connected, the arc-shaped receiving plates 2 of the two interconnected shield segment joints are relative and completely fitted, and at the same time, the concave groove 6 and the card joint 5 are matched and clamped with each other, thereby connecting the two shield segment joints into one, and achieving a stable connection.

[0021] Furthermore, this embodiment uses the steel skeleton 1 as the skeleton structure of the shield segment joint, which can enhance its strength and improve the compression and bending resistance. After connection, the shield segment joint is stable and safe. When connecting, the concave groove 6 and the clamping joint 5 are paired and clamped with each other to achieve a quick connection of two shield segment joints, and the connection is stable. When connecting, based on the supporting function of the arc-shaped receiving plate 2, tools can also be used to moderately knock the arc-shaped receiving plate 2 to further speed up the clamping speed and effect of the concave groove 6 and the clamping joint 5, so as to achieve fast and convenient segment connection. The overall structure has high safety, stability and high strength characteristics.

[0022] Specifically, the arcuate receiving plate 2 has an arc of a quarter of a circle; further, three of the clamping joints 5 and the concave clamping grooves 6 are evenly arranged along the arcuate receiving plate 2 where they are located.

[0023] In practical applications, waterproofness is also one of the important indicators of shield segment joints. In order to ensure the waterproof effect of the shield segment joints in this embodiment, this embodiment also designs the following waterproof structure: the outer walls of the two arc-shaped connecting plates 2 with the clamping joints 5 or the concave clamping grooves 6 are both provided with waterproof grooves 7; the waterproof grooves 7 are arranged along the curvature direction of the arc-shaped connecting plates 2; the outer walls of each of the arc-shaped connecting plates 2 are provided with two waterproof grooves 7, and the clamping joints 5 or the concave clamping grooves 6 are located between the two waterproof grooves 7.

[0024] During application, after two shield segment joints are connected, the waterproof grooves 7 of the arc-shaped receiving plates 2 that fit together are opposite to each other and form a matching groove structure, and then, waterproof gaskets, water-stop pads, etc. can be arranged in the waterproof grooves 7, and then, after the connection, the waterproofing of the connection between the two shield segment joints can be achieved. In addition, two waterproof grooves 7 are arranged in this embodiment, and the clamping joint 5 or the concave clamping groove 6 is located between the two waterproof grooves 7, and then the inside and outside of the shield segment joint can be waterproofed, and the joint position of the clamping joint 5 and the concave clamping groove 6 will not affect the waterproofing, and the waterproofing effect is good.

[0025] As a specific implementation, a strip waterproof bag (not shown in the figure) is installed in the waterproof groove 7; the strip waterproof bag is composed of a water-soluble film and expansive soil coated in the water-soluble film. The water-soluble film is a new type of environmentally friendly packaging material that has been processed by a special process and can be rapidly degraded by natural factors (water). It can be rapidly self-denatured, decomposed, and degraded into low molecular compounds by the action of water, and the expansive soil has the characteristic of swelling when it encounters water. When used, when the two shield segments are connected, the strip waterproof bag in the matching groove structure is in the initial state, and when the joint leaks, the water enters the waterproof groove, and the water-soluble film will dissolve under the action of water. At this time, the expansive soil will contact with water and then swell, filling the waterproof groove 7 and sealing the gap at the entire joint, achieving a stable, efficient and continuous waterproof effect.

[0026] In a further embodiment, the clamping joint 5 is a cylindrical structure, and the end of the clamping joint 5 is concave to form a socket 8. Two through holes 9 are evenly distributed in the circumferential direction of the clamping joint 5, and the two through holes 9 are connected to the socket 8. Two clamping blocks 10 are interference fit in the two through holes 9; the concave card slot 6 is a countersunk structure, and the aperture of the countersunk structure gradually increases from its orifice to the inside of the hole; a conical top block 11 is provided at the middle position of the bottom of the concave card slot 6, and the conical top block 11 can be extended into the socket 8 and partially eject the two clamping blocks 10 into the through hole 9; an annular card slot 12 is provided on the bottom circumference of the concave card slot 6, and the card block 10 can be partially ejected into the through hole 9 and then inserted into the annular card slot 12.

[0027] During application, when two shield segment joints are connected, first the clamping joint 5 enters the concave clamping groove 6, and the conical top block 11 gradually enters the insertion hole 8, and the clamping joint 5 is continuously pushed forward, and the side of the conical top block 11 will press against the end of the clamping block 10, and as the clamping joint 5 is pushed forward, based on the conical structure of the conical top block 11, the clamping block 10 can be continuously pushed upward to the through hole 9 under its action, and is smoothly implemented in the gradually increasing environment of the concave clamping groove 6, and when the clamping joint 5 is pushed to the predetermined position, at this time, the two clamping blocks 10 are both pushed out to the annular clamping groove 12, and the two clamping blocks 10 are partially clamped in the annular clamping groove 12, thereby realizing the matching clamping of the clamping joint 5 and the concave clamping groove 6, and the two shield segment joints can be firmly connected.

[0028] As a further embodiment, the two clamping blocks 10 have a wedge-shaped structure on one side facing the jack 8; the conical top block 11 is also provided with an annular step groove 13 on its circumference, and when the clamping joint 5 is clamped with the concave clamping groove 6, the wedge-shaped structure is clamped in the annular step groove 13. In order to further stabilize the connection effect of the two shield segment joints, the present embodiment is also provided with an annular step groove 13 on the circumference of the conical top block 11. When connected, the clamping joint 5 is continuously pushed forward, and the wedge-shaped structures of the two clamping blocks 10 will eventually be positioned on the circumference of the conical top block 11 and clamped on the step surface of the annular step groove 13 under the action of the annular step groove 13. Therefore, after the connection, the clamping block 10 can be limited in the length direction, which can prevent it from being separated from the annular clamping groove 12 due to external influences and causing clamping failure, further improving the safety and stability of the joint connection.

[0029] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A shield segment joint, characterized in that: The steel frame includes an integrally formed steel frame, the steel frame includes two opposite arc-shaped receiving plates and a plurality of support rods connected between the two arc-shaped receiving plates; A concrete covering layer is cast between the two arc-shaped receiving plates, and the concrete covering layer covers a plurality of support rods. The steel skeleton and the concrete covering layer constitute the shield segment joint; Among the two arc-shaped receiving plates: the outer wall of one of the arc-shaped receiving plates is provided with at least one clamping joint, and the outer wall of the remaining arc-shaped receiving plate is provided with at least one concave clamping groove. When any two of the shield segment joints are connected to each other, the clamping joint of one of the shield segment joints can be clamped with the concave clamping groove of the remaining shield segment joint.

2. The shield segment joint according to claim 1, characterized in that: The outer side walls of the two arc-shaped receiving plates provided with the clamping joints or the inner concave clamping grooves are both provided with waterproof grooves; The waterproof groove is arranged along the curvature direction of the arc-shaped receiving plate; The outer side wall of each arc-shaped receiving plate is provided with two waterproof grooves, and the clamping joint or the concave clamping groove is located between the two waterproof grooves.

3. The shield segment joint according to claim 2, characterized in that: A strip-shaped waterproof bag is installed in the waterproof groove; The strip waterproof bag is composed of a water-soluble film and expansive soil wrapped in the water-soluble film.

4. The shield segment joint according to claim 1, characterized in that: The clamping joint is a cylindrical structure, the end of the clamping joint is concave to form a plug hole, the clamping joint has two through holes evenly distributed in the circumferential direction, both through holes are connected to the plug hole, and both through holes have two clamping blocks in interference fit; The inner concave slot is a countersunk hole structure, and the diameter of the countersunk hole structure gradually increases along the hole opening toward the inside of the hole; A conical top block is arranged at the middle position of the bottom of the concave card slot, and the conical top block can be inserted into the insertion hole and push the two card block parts out to the through hole; The bottom circumference of the inner concave slot is provided with an annular slot, and the block portion can be inserted into the annular slot after being pushed out to the through hole.

5. The shield segment joint according to claim 4, characterized in that: The two card blocks have a wedge-shaped structure on one side facing the insertion hole; The circumference of the conical top block is also provided with an annular step groove. When the clamping joint is clamped with the inner concave clamping groove, the wedge-shaped structure is clamped in the annular step groove.

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