CN209856203U - A Segment Bolt Structure Resisting Stress Relaxation Under Train Vibration Loads - Google Patents

Abstract

The utility model relates to a segmental bolt structure resistant to train vibration load stress relaxation, comprising arc-shaped bolts, segment nuts and anti-stress relaxation pads; the arc-shaped bolts include arc-shaped screw rods, one end of which is a nut, and the other One end is provided with a threaded thread; the segment nut and the anti-stress relaxation gasket are installed on the threaded part of the arc bolt, and the anti-stress relaxation gasket is close to the segment nut on the inside and the segment on the outside; both sides of the anti-stress relaxation gasket There are damping tooth ribs, the inner side is close to the segment to form a friction force, and the outer side is close to the segment nut to form a friction force. The utility model adds an anti-stress relaxation gasket on the basis of the existing segment connecting bolts to ensure that the stress relaxation of the segment bolts caused by the vibration load of the train can be effectively resisted during the operation of the subway, and at the same time, the replacement of bolts and segments can be satisfied. Removable requirements.

Description

A Segment Bolt Structure Resisting Stress Relaxation Under Train Vibration Loads

technical field

The utility model relates to the technical field of shield tunnel construction, in particular to a segment bolt structure resistant to train vibration load stress relaxation.

Background technique

During the construction of the shield tunnel, due to the consideration of the durability of the bolts and the replacement of the segments, the detachable bolt method is used to connect the segments. However, under the action of vibration load, the bolt connection method is very prone to stress relaxation.

However, during the operation of the subway, the vibration load of the train is extremely frequent and unavoidable. Therefore, the influence of the stress relaxation of segment bolts under the long-term train vibration load has become an important factor that threatens the safety of the shield structure. The stress-relaxed detachable segment connection method is called the focal problem.

Contents of the invention

The purpose of the utility model is to provide a segment bolt structure resistant to train vibration load stress relaxation, which can resist the segment bolt stress relaxation caused by train vibration load during the operation of the subway, and improve the durability and performance of the segment connection structure. Stability, while satisfying the detachability of bolt replacement and segment replacement.

The technical scheme adopted in the utility model is:

A segment bolt structure resistant to train vibration load stress relaxation, characterized in that:

Includes arc bolts, segment nuts and anti-stress relaxation washers;

The arc-shaped bolt includes an arc-shaped screw rod, one end of the arc-shaped screw rod is a nut, and the other end is provided with a screw thread;

The segment nut and the anti-stress relaxation gasket are installed on the threaded part of the arc bolt, and the anti-stress relaxation gasket is close to the segment nut on the inside and the segment on the outside;

The two sides of the anti-stress relaxation gasket are provided with damping tooth ribs, the inner side is close to the segment to form a friction force, and the outer side is close to the segment nut to form a friction force.

A flexible washer is arranged at the nut of the arc-shaped bolt, and the center of the flexible washer is perforated by the flexible washer.

The anti-stress relaxation gasket includes two layers of slack sub-gaskets. One side of the slack sub-gasket is provided with damping tooth ribs, and the other side is provided with occlusal tooth ribs.

The slack sub-gasket has a hole in the center, and the ring is set on the outside of the arc-shaped screw rod.

The damping tooth ribs and the occlusal tooth ribs on both sides of the slack sub-gasket are radially arranged.

The tooth pitch of the occlusal tooth ribs of the slack sub-gasket is greater than the tooth pitch of the damping tooth ribs.

The center of the segment nut is an inner thread hole, and the outer part is an outer hexagonal edge.

The flexible gasket is a rubber gasket.

The utility model has the following advantages:

The utility model adds an anti-stress relaxation gasket on the basis of the existing segment connecting bolts to ensure that the stress relaxation of the segment bolts caused by the vibration load of the train can be effectively resisted during the operation of the subway, and at the same time, it meets the needs of bolt replacement and segment replacement. Removable requirements. Moreover, the utility model has little change to the existing segment connection mode, has the advantages of simple structure, easy operation, low cost, and is convenient for popularization and application.

Description of drawings

Fig. 1 is the overall assembly figure of the utility model;

Figure 2 is a structural diagram of arc bolts;

Fig. 3 is the elevation view of segment nut;

Figure 4 is a plan view of the segment nut;

Figure 5 is an elevation view of the anti-stress relaxation gasket;

Figure 6 is a plane view of the occlusal tooth rib;

Figure 7 is a plan view of the damping tooth rib;

Figure 8 is an elevation view of the flexible gasket;

Figure 9 is a plan view of the flexible gasket.

In the figure, 1-curved bolt, 2-segment nut, 3-anti-stress relaxation gasket, 4-flexible washer, 101-curved screw, 103-nut, 102-thread; 201-outer hexagonal, 202-inner thread hole; 301-slack sub-gasket, 302-damping tooth rib, 303-occlusal tooth rib; 401-flexible gasket outer ring, 402-flexible gasket perforation.

Detailed ways

The utility model is described in detail below in conjunction with specific embodiments.

The utility model relates to a segment bolt structure resistant to train vibration load stress relaxation, which comprises an arc-shaped bolt 1, a segment nut 2 and a stress relaxation gasket 3. The arc-shaped bolt 1 includes an arc-shaped screw rod 101, one end of the arc-shaped screw rod 101 is a nut 103, and the other end is provided with a screw thread 102; The anti-stress relaxation gasket 3 is in close contact with the segment nut 2 on the inner side; the two sides of the anti-stress relaxation gasket 3 are provided with damping tooth edges 302 , the inner side is close to the segment to form a friction force, and the outer side is close to the segment nut 2 to form a friction force. The center of the segment nut 2 is an inner thread hole 202, and the outside is an outer hexagonal edge 201.

The nut 103 of the arc-shaped bolt 1 is provided with a flexible washer 4. The center of the flexible washer 4 is a flexible washer perforation 402, which is looped around the arc-shaped screw rod 101, and the inner side is close to the nut 103, and the outer side is close to the segment. The flexible washer 4 is a rubber washer.

The anti-stress slack gasket 3 includes two layers of slack sub-gaskets 301, one side of the slack sub-gasket 301 is provided with damping tooth ribs 302, and the other side is provided with occlusal tooth ribs 303, and the two slack sub-gaskets 301 occlusal tooth ribs 303 are relatively engaged Composition anti-stress relaxation gasket 3. The slack sub-gasket 301 has a hole in the center, and is looped around the arc-shaped screw rod 101 . The damping tooth ribs 302 and the engaging tooth ribs 303 on both sides of the slack sub-gasket 301 are radially arranged, and the tooth pitch of the engaging tooth ribs 303 is greater than that of the damping tooth ribs 302 . According to the vibration-relaxed bolt bite test, setting bolts with different pitches is beneficial to resist stress relaxation.

After the flexible gasket 4 is installed on the arc-shaped screw 101, insert the arc-shaped bolt 1 into the bolt hole of the segment, and after the occlusal teeth 303 of the anti-stress relaxation gasket 3 engage with each other, install it on the buckle wire 102 of the arc-shaped bolt 1 , and paste the damping tooth edge 302 on the segment, rotate the segment nut 2 through the inner thread hole 202 on the screw thread 102 of the arc bolt 1, and gradually compress the anti-stress relaxation gasket 3, pass the damping tooth The frictional force of the ribs 302 makes the engaging toothed ribs 303 clenched gradually, and the damping toothed ribs 302 on the other side are tightly buckled on the surface of the segment to form a frictional force.

The content of the utility model is not limited to the examples listed, and any equivalent transformations taken by those skilled in the art to the technical solution of the utility model by reading the specification of the utility model are covered by the claims of the utility model.

Claims (8)

1. The utility model provides a resist relaxed section of jurisdiction bolt structure of train vibration load stress which characterized in that:

comprises an arc bolt (1), a segment nut (2) and a stress relaxation resistant gasket (3);

the arc bolt (1) comprises an arc screw (101), one end of the arc screw (101) is provided with a nut (103), and the other end is provided with a screw thread (102);

the segment nut (2) and the anti-stress relaxation gasket (3) are arranged at the screw thread part of the arc bolt (1), the anti-stress relaxation gasket (3) is tightly attached to the segment nut (2) at the inner side, and the segment is tightly attached to the outer side;

damping tooth edges (302) are arranged on two sides of the stress relaxation resistant gasket (3), the inner side of the stress relaxation resistant gasket clings to the segment to form friction force, and the outer side of the stress relaxation resistant gasket clings to the segment nut (2) to form friction force.

2. The segment bolt structure for resisting the stress relaxation of train vibration loads according to claim 1, wherein:

a flexible washer (4) is arranged at the nut (103) of the arc bolt (1), a flexible gasket through hole (402) is formed in the center of the flexible washer (4), and the flexible gasket is sleeved outside the arc screw (101) and tightly attached to the nut (103) on the inner side.

3. The segment bolt structure for resisting the stress relaxation of train vibration loads according to claim 1, wherein:

the anti-stress relaxation gasket (3) comprises two layers of relaxation sub gaskets (301), one surface of each relaxation sub gasket (301) is provided with a damping tooth edge (302), the other surface of each relaxation sub gasket is provided with an occlusion tooth edge (303), and the two relaxation sub gaskets (301) are occluded with the occlusion tooth edges (303) relatively to form the anti-stress relaxation gasket (3).

4. The segment bolt structure for resisting the stress relaxation of train vibration loads according to claim 3, wherein:

the center of the relaxation piece gasket (301) is provided with a hole and is sleeved outside the arc-shaped screw rod (101).

5. The segment bolt structure for resisting the stress relaxation of train vibration loads according to claim 3, wherein:

the damping tooth edges (302) and the occlusion tooth edges (303) on the two surfaces of the relaxation sub-gasket (301) are radially arranged.

6. The segment bolt structure for resisting the stress relaxation of train vibration loads according to claim 5, wherein:

the pitch of the engaging tips (303) of the loosening sub-spacer (301) is larger than the pitch of the damping tips (302).

7. The segment bolt structure for resisting the stress relaxation of train vibration loads according to claim 1, wherein:

the center of the segment nut (2) is provided with an inner threaded hole (202), and the outer part of the segment nut is provided with an outer hexagonal edge (201).

8. The segment bolt structure for resisting the stress relaxation of train vibration loads according to claim 2, wherein:

the flexible gasket (4) is a rubber gasket.