CN220015191U

CN220015191U - Shield segment prestress structure and tensioning device

Info

Publication number: CN220015191U
Application number: CN202321556107.5U
Authority: CN
Inventors: 陈永钟; 王波东; 林尚连; 王兴龙; 黄震江
Original assignee: Tengda Construction Group Co Ltd
Current assignee: Tengda Construction Group Co Ltd
Priority date: 2023-06-19
Filing date: 2023-06-19
Publication date: 2023-11-14
Anticipated expiration: 2033-06-19

Abstract

The utility model belongs to the technical field of underground engineering tunnel equipment, and discloses a shield segment prestress structure and a tensioning device. The shield segment prestress structure comprises a segment, a steel pipe, a double-end stud, a nut, a first gasket, a clamping piece and a connecting piece, wherein the segment is provided with a containing hole, the steel pipe is inserted in the containing hole, the double-end stud is inserted in the steel pipe, and two ends of the double-end stud are respectively protruded out of two ends of the steel pipe; the nut comprises a first nut and a second nut, the first nut is in threaded connection with the first end of the stud, and the second nut is in threaded connection with the second end of the stud; the first washer is sleeved at the first end of the stud and is positioned between the first nut and the duct piece; the clamping piece is arranged between the inner wall of the first gasket and the outer wall of the stud; the connecting piece is tubular structure, and the inner wall of connecting piece is equipped with the internal thread, and the connecting piece is connected with the first end of double-end stud. The shield segment prestress structure provided by the utility model can effectively avoid deformation or loosening in the process of removing the shield tail.

Description

Shield segment prestress structure and tensioning device

Technical Field

The utility model relates to the technical field of underground engineering tunnel equipment, in particular to a shield segment prestress structure and a tensioning device.

Background

The shield segment is a main assembly component for shield construction, is the innermost barrier of a tunnel, and plays roles of resisting soil layer pressure, underground water pressure and some special loads. The shield segment is a permanent lining structure of the tunnel by a shield method, and the quality of the shield segment is directly related to the overall quality and safety of the tunnel, so that the waterproof performance and the durability of the tunnel are affected.

After a plurality of shield segments are assembled, the problems of insufficient fastening of formed segments, slotting among segments, water leakage and the like are easily caused along with pushing and pulling of the shield, and the subsequent fastening is difficult to meet the corresponding requirements. Especially shield 'knocks' phenomenon easily appears in the shield receiving process, leads to the receiving section of jurisdiction to appear to disengage, connecting screw rod breaks, section of jurisdiction dislocation, broken etc. phenomenon, has serious potential safety hazard, also seriously influences the quality of shaping tunnel simultaneously.

Disclosure of Invention

The utility model aims to provide a shield segment prestress structure and a tensioning device, which aim to improve the structure of a shield segment so as to improve the use reliability of the shield segment and avoid deformation or loosening in the process of removing a shield tail.

To achieve the purpose, the utility model adopts the following technical scheme:

shield constructs section of jurisdiction prestressing structure, includes:

the duct piece is provided with an accommodating hole;

the steel pipe is inserted into the accommodating hole;

the double-end stud is inserted into the steel pipe, and two ends of the double-end stud are respectively protruded out of two ends of the steel pipe;

the nut comprises a first nut and a second nut, the first nut is in threaded connection with the first end of the stud, the first end of the stud extends and protrudes along the axial direction of the first nut, and the second nut is in threaded connection with the second end of the stud;

the first gasket is sleeved at the first end of the double-end stud and positioned between the first nut and the duct piece;

the clamping piece is arranged between the inner wall of the first gasket and the outer wall of the stud;

the connecting piece is of a tubular structure, an inner wall of the connecting piece is provided with an inner thread, and one end of the connecting piece is connected with the first end of the double-end stud.

Optionally, the steel pipe is connected with the segment by welding.

Optionally, a clamping protrusion is arranged on the outer surface of the other end of the connecting piece.

Optionally, the shield segment prestress structure further comprises a second washer, and the second washer is arranged between the second nut and the segment.

A tensioning device for preparing the shield segment pre-stressing structure according to any one of the above schemes, the tensioning device comprising:

the jack comprises a cylinder body and a tensioning assembly arranged on the cylinder body, and the tensioning assembly is clamped with the other end of the connecting piece;

the supporting feet are arranged between the jack and the first gasket, and the jack extrudes the first gasket and the clamping piece through the supporting feet.

Optionally, the tensioning assembly comprises a tensioning rod, the tensioning rod penetrates through the cylinder body, two ends of the tensioning rod extend out of two ends of the cylinder body respectively, one end of the tensioning rod is provided with a tensioning chuck, the tensioning chuck is clamped with the other end of the connecting piece, the other end of the tensioning rod is provided with a tensioning nut, and the tensioning nut is in butt fit with the cylinder body.

Optionally, a clamping groove is concavely formed in the inner wall of the tensioning chuck.

Optionally, a gasket is arranged between the tensioning nut and the cylinder body.

The utility model has the beneficial effects that: according to the shield segment prestress structure provided by the utility model, the steel pipe is inserted into the segment, the stud can penetrate through the steel pipe, the first end of the stud is sequentially sleeved with the first washer and the first nut, the clamping piece is arranged between the inner wall of the first washer and the outer wall of the stud, the first nut is screwed on the outer side of the first washer, the stud, the first washer and the clamping piece are ensured to form a prestress structure, and deformation or loosening in the process of removing the shield tail is avoided.

The utility model also provides a tensioning device for preparing the shield segment prestress structure, which comprises a jack and supporting feet, wherein the tensioning component of the jack is clamped with the other end of the connecting piece, and the supporting feet are arranged between the jack and the first gasket.

Drawings

Fig. 1 is a schematic structural diagram of a shield segment prestress structure provided by an embodiment of the present utility model;

FIG. 2 is a schematic view of a tensioning device provided by an embodiment of the utility model mounted on a pre-stressing structure of a shield segment;

FIG. 3 is a schematic diagram of a connection between two shield segment prestressed structures according to an embodiment of the present utility model;

fig. 4 is a schematic view of a tensioning device according to an embodiment of the present utility model mounted on the pre-stressing structure of the shield segment shown in fig. 3.

In the figure:

100. a shield segment prestress structure; 200. a tensioning device;

110. a segment; 120. a steel pipe; 130. a double-ended stud; 141. a first nut; 142. a second nut; 150. a connecting piece; 151. the clamping bulge; 160. a first gasket; 170. a second gasket; 180. a clamping piece;

210. a jack; 211. a cylinder; 212. tensioning assembly; 2121. a tension rod; 2122. tensioning a chuck; 21221. a clamping groove; 2123. tensioning the nut; 220. supporting feet; 230. a gasket.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

As shown in fig. 1, the present embodiment provides a shield segment pre-stressing structure 100, where the shield segment pre-stressing structure 100 includes a segment 110, a steel tube 120, a stud 130, a nut, a first washer 160, a clamping piece 180, and a connecting piece 150, the segment 110 is provided with a receiving hole, the steel tube 120 is inserted into the receiving hole, the stud 130 is inserted into the steel tube 120, and two ends of the stud 130 are respectively protruded from two ends of the steel tube 120; the nuts comprise a first nut 141 and a second nut 142, the first nut 141 is in threaded connection with the first end of the stud 130, the first end of the stud 130 extends and protrudes along the axial direction of the first nut 141, and the second nut 142 is in threaded connection with the second end of the stud 130; the first washer 160 is sleeved at the first end of the stud 130 and is located between the first nut 141 and the segment 110; the clip 180 is disposed between the inner wall of the first washer 160 and the outer wall of the stud 130; the connecting member 150 has a tubular structure, and an inner wall of the connecting member 150 is provided with an internal thread, and one end of the connecting member 150 is connected to the first end of the stud 130.

The shield segment prestress structure 100 provided in this embodiment, the steel pipe 120 is inserted in the segment 110, the stud 130 may pass through the steel pipe 120, the first end of the stud 130 is sequentially sleeved with the first washer 160 and the first nut 141, the clamping piece 180 is disposed between the inner wall of the first washer 160 and the outer wall of the stud 130, the first nut 141 is screwed on the outer side of the first washer 160, the stud 130, the first washer 160 and the clamping piece 180 are guaranteed to form a prestress structure, and deformation or loosening in the process of removing the shield tail is avoided.

Optionally, the steel pipe 120 is pre-buried in the segment 110 and is connected with the segment 110 through seamless welding, so that the connection stability and the use reliability are improved.

To improve the locking firmness between the second nut 142 and the segment 110, a second washer 170 is provided between the second nut 142 and the segment 110.

Preferably, the outer surface of the other end of the connection member 150 is provided with a locking protrusion 151 for locking with an external part to stabilize the connection.

As shown in fig. 2, the present embodiment further provides a tensioning device 200, which is used for preparing the shield segment prestress structure 100, where the tensioning device 200 includes a jack 210 and a supporting leg 220, the jack 210 includes a cylinder 211 and a tensioning assembly 212 mounted on the cylinder 211, and one end of the tensioning assembly 212 far from the cylinder 211 is clamped with the other end of the connecting piece 150; foot 220 is disposed between jack 210 and first washer 160, and jack 210 compresses first washer 160 and clip 180 via foot 220.

The tensioning device 200 provided in this embodiment includes a jack 210 and a supporting leg 220, where the tensioning component 212 of the jack 210 is clamped to the other end of the connecting member 150, and the supporting leg 220 is disposed between the jack 210 and the first gasket 160, which is simple in structure and easy to install.

Specifically, the tensioning assembly 212 includes a tensioning rod 2121, the tensioning rod 2121 is arranged on the cylinder 211 in a penetrating manner, two ends of the tensioning rod 2121 extend to protrude out of two ends of the cylinder 211 respectively, one end of the tensioning rod 2121 is provided with a tensioning chuck 2122, the tensioning chuck 2122 is clamped with the other end of the connecting piece 150, the other end of the tensioning rod 2121 is provided with a tensioning nut 2123, the tensioning nut 2123 is in butt fit with the cylinder 211, coaxial arrangement of the tensioning rod 2121 and the cylinder 211 is achieved, and tension force can be formed on the tensioning rod 2121 along the central axis direction of the tensioning rod 2121, so that stable and reliable tensioning is performed on the tensioning rod 2121.

Further, the inner wall of the tensioning chuck 2122 is concavely provided with a clamping groove 21221, and the clamping groove 21221 can be matched with the clamping protrusion 151 on the outer surface of the connecting piece 150 to realize clamping.

Optionally, a gasket 230 is disposed between the tensioning nut 2123 and the cylinder 211, reducing the pressure of the tensioning nut 2123 on the cylinder 211, and protecting the cylinder 211.

Illustratively, tensioning clamp 2122 includes two symmetrical and spaced apart halves to facilitate its nesting and snap-fit over the outside of connector 150.

The embodiment also provides a tensioning method of the shield segment prestress structure, which adopts the tensioning device 200, and comprises the following steps:

s1, mounting a steel pipe 120 on a duct piece 110, and inserting a stud 130 into the steel pipe 120;

s2, a second nut 142 is in threaded connection with the second end of the stud 130;

s3, the clamping piece 180 and the connecting piece 150 are arranged at the first end of the stud 130;

s4, mounting the supporting feet 220 and the jack 210, wherein one end of the tensioning assembly 212, which is far away from the cylinder 211, is clamped with the other end of the connecting piece 150;

s5, operating jack 210, so that jack 210 pushes leg 220 to move along the axial direction of tensioning assembly 212, leg 220 presses clip 180 and first washer 160, and clip 180 is inserted between the inner wall of first washer 160 and the outer wall of stud 130.

According to the tensioning method of the shield segment pre-stressing structure provided by the embodiment, the tensioning device 200 is adopted, the jack 210 pushes the supporting leg 220 to move along the axial direction of the tensioning assembly 212, the supporting leg 220 extrudes the first gasket 160 (equivalent to an anchor plate) and the clamping piece 180, the clamping piece 180 is inserted between the inner wall of the first gasket 160 and the outer wall of the stud 130, the tensioning assembly 212 stretches and acts on the stud 130, pre-stressing is formed among the stud 130, the first gasket 160 and the clamping piece 180, tensioning of the shield segment pre-stressing structure 100 is completed, and operation is simple and convenient.

Further, after the clip 180 is inserted between the inner wall of the first washer 160 and the outer wall of the stud 130, the jack 210 is relieved, the jack 210, the leg 220 and the connection member 150 are removed, and the first nut 141 and the connection member 150 are sequentially installed at the first end of the stud 130. It should be noted that first nut 141 should be installed immediately after removing jack 210, foot 220, and connector 150 to ensure that stud 130, first washer 160, and clip 180 form a pre-stressed structure.

Referring to fig. 3 and fig. 4, after the first shield segment prestressed structure 100 is prepared by the above-mentioned tensioning method, when assembling a plurality of shield segment prestressed structures 100, the following steps may be adopted:

s10, preparing an initial part of a second shield segment prestress structure 100, wherein the initial part comprises a segment 110, a steel pipe 120, a double-end stud 130, a first washer 160 and a first nut 141, and assembling the components;

s20, directly mounting the second end of the stud 130 on the connecting piece 150 of the first shield segment pre-stressing structure 100, wherein it is understood that the second nut 142 and the second washer 170 are not required for the second shield segment pre-stressing structure 100;

s30, removing the first nut 141, installing the clamping piece 180 and the connecting piece 150, and installing the tensioning device 200 at the first end of the stud 130;

s40, operating the jack 210 to enable the clamping piece 180 to be inserted between the inner wall of the first gasket 160 and the outer wall of the stud 130;

s50, unloading the jack 210, removing the jack 210, the supporting feet 220 and the connecting piece 150, sequentially installing the first nut 141 and the connecting piece 150 at the first end of the double-end stud 130, and completing the connection between the second shield segment pre-stressing structure 100 and the first shield segment pre-stressing structure 100.

When the shield segment pre-stressing structure 100 is assembled by the method, as each shield segment pre-stressing structure 100 has a certain pre-stressing force, the shield segment pre-stressing structure 100 can be effectively prevented from being broken and loosened along with the whole pushing and pulling of the shield, and the problem of dislocation among the shield segment pre-stressing structures 100 can be avoided.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. Shield constructs section of jurisdiction prestressing structure, its characterized in that includes:

a duct piece (110) provided with an accommodation hole;

a steel pipe (120) inserted into the accommodation hole;

the double-end stud (130) is inserted into the steel pipe (120), and two ends of the double-end stud (130) are respectively protruded out of two ends of the steel pipe (120);

the nut comprises a first nut (141) and a second nut (142), wherein the first nut (141) is in threaded connection with the first end of the stud (130), the first end of the stud (130) extends and protrudes along the axial direction of the first nut (141), and the second nut (142) is in threaded connection with the second end of the stud (130);

a first washer (160) sleeved at the first end of the stud (130) and positioned between the first nut (141) and the segment (110);

a clip (180) disposed between an inner wall of the first washer (160) and an outer wall of the stud (130);

the connecting piece (150) is of a tubular structure, an inner wall of the connecting piece (150) is provided with an inner thread, and one end of the connecting piece (150) is connected with the first end of the double-end stud (130).

2. The shield segment prestressed structure of claim 1, wherein said steel pipe (120) and said segment (110) are connected by welding.

3. The shield segment pre-stressing structure according to claim 1, characterized in that the outer surface of the other end of the connecting piece (150) is provided with a clamping protrusion (151).

4. The shield segment pre-stressing structure according to claim 1, further comprising a second washer (170), said second washer (170) being arranged between said second nut (142) and said segment (110).

5. Tensioning device for preparing a pre-stressing structure of a shield segment according to any one of claims 1-4, comprising:

a jack (210), wherein the jack (210) comprises a cylinder body (211) and a tensioning assembly (212) arranged on the cylinder body (211), and the tensioning assembly (212) is clamped with the other end of the connecting piece (150);

and the supporting leg (220) is arranged between the jack (210) and the first gasket (160), and the jack (210) presses the first gasket (160) and the clamping piece (180) through the supporting leg (220).

6. The tensioning device of claim 5, wherein the tensioning assembly (212) comprises a tensioning rod (2121), the tensioning rod (2121) is arranged on the cylinder body (211) in a penetrating mode, two ends of the tensioning rod (2121) extend to protrude out of two ends of the cylinder body (211) respectively, a tensioning clamp head (2122) is arranged at one end of the tensioning rod (2121), the tensioning clamp head (2122) is clamped with the other end of the connecting piece (150), a tensioning nut (2123) is arranged at the other end of the tensioning rod (2121), and the tensioning nut (2123) is in butt fit with the cylinder body (211).

7. The tensioning device of claim 6, wherein the inner wall of the tensioning collet (2122) is concavely provided with a snap groove (21221).

8. The tightening device according to claim 6, characterized in that a washer (230) is arranged between the tensioning nut (2123) and the cylinder (211).