CN212509142U - Improve shield tunnel toughness performance's bolt structure and bolt - Google Patents
Improve shield tunnel toughness performance's bolt structure and bolt Download PDFInfo
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- CN212509142U CN212509142U CN202020929782.8U CN202020929782U CN212509142U CN 212509142 U CN212509142 U CN 212509142U CN 202020929782 U CN202020929782 U CN 202020929782U CN 212509142 U CN212509142 U CN 212509142U
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- shield tunnel
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Abstract
The utility model discloses a bolt structure for improving toughness of a shield tunnel, which comprises a screw rod, wherein the screw rod comprises a polished rod part and a threaded part, the threaded part is connected with a nut, the threaded part is positioned at two ends of the polished rod part, and the polished rod part comprises a first polished rod part and a second polished rod part positioned at two ends of the first polished rod part; the outer diameter of the first polished rod part is larger than that of the second polished rod part; the major diameter of the thread part is equal to the outer diameter of the second polished rod part; and a spring and an elastic washer are sequentially sleeved on the screw rod between the first polished rod part and the nut, and the inner diameter of the spring is smaller than the outer diameter of the first polished rod part. The utility model also discloses a bolt, this bolt include as above bolt structure. The utility model discloses can be used to connect shield tunnel section of jurisdiction etc. utilizes high strength spring to the absorption of seismic oscillation energy, improves the toughness of section of jurisdiction under seismic load, avoids the section of jurisdiction great displacement to appear, guarantees the integrality in tunnel.
Description
Technical Field
The utility model relates to a bolt, in particular to improve shield tunnel toughness performance's bolt structure and bolt.
Background
At present, with the rapid development of economy in China, the demand of underground tunnel construction is increasing day by day. The expansion of the tunnel construction area puts forward higher requirements for the tunnel construction, and particularly in areas with larger seismic fortification intensity, the improvement of the seismic performance of the tunnel is a major subject facing the tunnel construction. Since the 20 th century, the occurrence of several violent shocks in the world has posed a great threat to the safety of human lives and property. Earthquake damage data show that when the earthquake intensity reaches 7 degrees, the tunnel is easy to damage in different degrees, and the structure is extremely difficult to repair. In the 7.2-grade earthquake center of Osaka, Japan, 1995, the tunnel failure rate of the earthquake region exceeds 10 percent. In 8.0-level earthquake in Wenchuan in 2008, a plurality of tunnels near the earthquake center have obvious lining dislocation destruction. Although the design and construction of the tunnel segment bolt have a mature theory as a guide, the design aiming at earthquake resistance is lacked, and the segment joint is easy to damage when bearing earthquake load due to the discontinuity of the structure. This is even more evident for tunnel structures in high intensity seismic areas. Therefore, in the construction design of the tunnel, the segment bolts are reasonably improved, the toughness of the tunnel segment is improved, and the segment bolts are necessary for improving the resistance of the segment to earthquake damage.
Disclosure of Invention
The utility model provides a solve the technical problem that exists among the well-known technology and provide a improve shield tunnel toughness performance's bolt structure and bolt.
The utility model discloses a solve the technical scheme that technical problem that exists among the well-known technique took and be: a bolt structure for improving toughness performance of a shield tunnel comprises a screw, wherein the screw comprises a polished rod part and a threaded part, the threaded part is connected with a nut, the threaded part is positioned at two ends of the polished rod part, and the polished rod part comprises a first polished rod part and second polished rod parts positioned at two ends of the first polished rod part; the outer diameter of the first polished rod part is larger than that of the second polished rod part; the major diameter of the thread part is equal to the outer diameter of the second polished rod part; and a spring and an elastic washer are sequentially sleeved on the screw rod between the first polished rod part and the nut, and the inner diameter of the spring is smaller than the outer diameter of the first polished rod part.
Further, the screw is a straight screw or an arc screw.
Furthermore, the central line of the arc screw is a section of arc, and the included angle of the tangent lines of the two end points of the arc is 120-150 degrees.
Further, the outer diameter of the second polished rod part is 4/5-5/6 of the outer diameter of the first polished rod part.
Further, the length of the first polished rod part is 1/2-3/5 of the length of the screw rod; the length of the thread part is 1/8-1/5 of the length of the screw.
Furthermore, a washer is sleeved on the screw rod between the first polished rod part and the spring.
Further, the gasket is a gasket with elasticity.
Further, the screw is made of low alloy steel materials.
Furthermore, the tensile strength of the spring cushion is 1200N/mm2～2000N/mm2In the meantime.
The utility model also provides a bolt, this bolt include as above the improvement shield tunnel toughness performance's bolt structure.
The utility model has the advantages and positive effects that:
the utility model discloses a bolt can be used to connect shield tunnel section of jurisdiction, utilizes high strength spring to the absorption of seismic oscillation energy, improves the toughness of section of jurisdiction under seismic load, avoids the section of jurisdiction great displacement to appear, guarantees the integrality in tunnel: the pressure of the high-strength spring can be adjusted through the adjusting nut, and the generated deformation can be used for absorbing ground vibration energy; the high-strength spring has high strength and is not easy to generate plastic deformation. Therefore, most of the deformation generated under the action of the earthquake can be recovered, and a large amount of replacement is not needed; the energy dissipation effect of the high-strength spring enables the segment joint to be allowed to generate large deformation, the local large deformation of the segment joint can be adapted under the action of an earthquake, the structural integrity of the segment is guaranteed, post-earthquake maintenance is facilitated, and maintenance cost is reduced.
The utility model discloses a bolt can be used to other vibration occasions, for example the part of the vehicle that traveles is connected etc.
Drawings
Fig. 1 is a schematic view of a first bolt structure of the present invention;
fig. 2 is a schematic view of a second bolt structure of the present invention;
fig. 3 is a schematic view of a screw structure in a first bolt structure of the present invention;
in the figure: 1. a screw; 2. an elastic washer; 3. a nut; 4. a spring; 101. a first polished rod section; 102. a second polished rod section; 103. a threaded portion.
Detailed Description
For further understanding of the contents, features and effects of the present invention, the following embodiments are listed and will be described in detail with reference to the accompanying drawings:
referring to fig. 1 to 3, a bolt structure for improving toughness performance of a shield tunnel includes a screw 1, the screw 1 includes a polished rod portion and a threaded portion 103, the threaded portion 103 is connected with a nut 3, the threaded portion 103 is located at two ends of the polished rod portion, the polished rod portion includes a first polished rod portion 101 and second polished rod portions 102 located at two ends of the first polished rod portion 101; the outer diameter of the first polished rod part 101 is larger than that of the second polished rod part 102; the major diameter of the thread part 103 is equal to the outer diameter of the second polished rod part 102; the screw rod 1 between the first polished rod part 101 and the nut 3 is sleeved with the screw rod in sequenceA spring 4 and an elastic washer 2 are connected, and the inner diameter of the spring 4 is smaller than the outer diameter of the first polished rod part 101. The elastic washer 2 may be a saddle-shaped elastic washer, a wave-shaped elastic washer, a tapered elastic washer, or the like having elasticity. The elastic washer 2 can absorb vibration and impact and prevent the nut 3 from loosening. External vibration such as earthquake causes the section of jurisdiction to produce the axial effort to screw rod 1, and this kind of vibration effort can be absorbed by spring 4, adopts spring 4, and the protection screw rod 1 of being convenient for, spring 4 can absorb vibration and impact, play the cushioning effect for the section of jurisdiction junction allows to produce great deformation, can adapt to the great deformation in part of section of jurisdiction junction under the seismic action, guarantees that the structure of section of jurisdiction is complete, does benefit to and shakes the after-maintenance. The spring 4 can be selected with tensile strength more than 1200N/mm2The high-strength spring has the characteristic of better absorbing seismic wave energy. The tensile strength of the spring 4 can be 1200N/mm2～2000N/mm2In the meantime. Preferably 1500N/mm2～1800N/mm2. In the actual engineering, the tensile strength value of the spring 4 can be determined according to the actual working condition.
The screw may be a straight screw or an arc screw. The central line of the arc screw is a section of arc, and the included angle of the tangent lines of the two end points of the arc is 120-150 degrees. When being applied to connecting shield tunnel section of jurisdiction, screw rod 1 can select straight screw rod also can select the arc screw rod. Preferably an arc screw. As shown in fig. 2, the center line of the screw 1 may be a circular arc. The arc-shaped screw rod is more suitable for connecting the arc-shaped pipe pieces. The deformation of the duct piece caused by an earthquake and the like can be better absorbed. The included angle of the tangent lines of the two end points of the circular arc is related to the size of the screw and the radius of the segment, and the circular arc is matched with the curvature of the segment during selection.
The outer diameter of the second polished rod part 102 can be 4/5-5/6 of the outer diameter of the first polished rod part 101. Therefore, the spring 4 can be conveniently installed, and the screw rod 1 can be ensured to have higher tensile strength and yield strength.
The length of the first polished rod part 101 can be 1/2-3/5 of the length of the screw 1; the length of the thread part 103 can be 1/8-1/5 of the length of the screw 1. The length of the thread is required to meet the requirement of being capable of adjusting the pressure of the spring 4 and enabling the overall performance of the screw rod 1 to meet the requirement. Preferably, the length of the first polished rod part 101 is 1/2 of the length of the screw 1; the length of the threaded portion 103 is 3/16 of the length of the screw 1.
Preferably, a washer is sleeved on the screw rod 1 between the first polished rod part 101 and the spring 4. The washer may increase the pressure area of the spring 4 acting on the end face of the first polished rod. Preferably, the gasket may be a gasket with elasticity. The elastic washer can absorb partial pressure of the spring, and the end face of the first polished rod is protected more conveniently. The gasket may be a wave elastic gasket, a conical elastic gasket, or the like.
Preferably, the screw 1 may be a screw made of a low alloy steel material. Compared with the carbon structural steel, the low-alloy steel material has better plasticity, toughness and welding performance, and the size of the structural member can be reduced by using the low-alloy high-strength steel, so that the weight is reduced.
The utility model also provides a bolt embodiment, this bolt include foretell improvement shield tunnel toughness performance's bolt structure. The utility model discloses a bolt can be used to connect shield tunnel section of jurisdiction, also can be used to other vibration occasions. Use in actual engineering the utility model discloses the bolt can guarantee that the connection between the section of jurisdiction has stronger toughness under the earthquake action. When earthquake damage occurs, the connection part of the duct pieces of the tunnel can well absorb the energy of earthquake vibration, and the capability of the duct pieces for resisting larger deformation is improved.
The utility model discloses a theory of operation:
the pressure of the spring 4 can be adjusted by adjusting the nut 3, and the deformation energy generated by the spring 4 can be used for absorbing the ground vibration energy. (2) The spring 4 having a high tensile strength is not easily plastically deformed due to its high strength. Therefore, most of the deformation generated under the action of the earthquake can be recovered, and the deformation does not need to be replaced in large quantity. (3) The spring 4 with high tensile strength can absorb vibration and impact and play a role of buffering, so that the joint of the duct piece is allowed to generate large deformation, the local large deformation of the joint of the duct piece can be adapted under the action of earthquake, the structural integrity of the duct piece is ensured, and the maintenance after the earthquake is facilitated.
The capability of resisting deformation of the connecting part of the duct piece is improved by utilizing the absorption effect of the spring 4 with tensile strength in the bolt on seismic wave propagation.
The above-mentioned embodiments are only used for illustrating the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention accordingly, the scope of the present invention should not be limited by the embodiment, that is, all equivalent changes or modifications made by the spirit of the present invention should still fall within the scope of the present invention.
Claims (10)
1. The bolt structure for improving the toughness performance of the shield tunnel is characterized by comprising a screw, wherein the screw comprises a polished rod part and a threaded part, the threaded part is connected with a nut, the threaded part is positioned at two ends of the polished rod part, and the polished rod part comprises a first polished rod part and second polished rod parts positioned at two ends of the first polished rod part; the outer diameter of the first polished rod part is larger than that of the second polished rod part; the major diameter of the thread part is equal to the outer diameter of the second polished rod part; and a spring and an elastic washer are sequentially sleeved on the screw rod between the first polished rod part and the nut, and the inner diameter of the spring is smaller than the outer diameter of the first polished rod part.
2. The bolt structure for improving the toughness of the shield tunnel according to claim 1, wherein the screw is a straight screw or an arc screw.
3. The bolt structure for improving the toughness of the shield tunnel according to claim 2, wherein the central line of the arc-shaped screw is a section of arc, and the included angle between the tangent lines of the two end points of the arc is 120-150 °.
4. The bolt structure for improving the toughness of the shield tunnel according to claim 1, wherein the outer diameter of the second polished rod portion is 4/5-5/6 of the outer diameter of the first polished rod portion.
5. The bolt structure for improving the toughness of the shield tunnel according to claim 1, wherein the length of the first polished rod part is 1/2-3/5 of the length of the screw rod; the length of the thread part is 1/8-1/5 of the length of the screw.
6. The bolt structure for improving the toughness performance of the shield tunnel according to claim 1, wherein a washer is further sleeved on the screw rod between the first polished rod part and the spring.
7. The bolt structure for improving the toughness of the shield tunnel according to claim 6, wherein the gasket is a gasket with elasticity.
8. The bolt structure for improving the toughness performance of the shield tunnel according to claim 1, wherein the screw is made of low alloy steel material.
9. The bolt structure for improving toughness of shield tunnel according to claim 1, wherein said spring pad has a tensile strength of 1200N/mm2～2000N/mm2In the meantime.
10. A bolt comprising the bolt structure for improving toughness performance of a shield tunnel according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020929782.8U CN212509142U (en) | 2020-05-28 | 2020-05-28 | Improve shield tunnel toughness performance's bolt structure and bolt |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020929782.8U CN212509142U (en) | 2020-05-28 | 2020-05-28 | Improve shield tunnel toughness performance's bolt structure and bolt |
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| Publication Number | Publication Date |
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| CN212509142U true CN212509142U (en) | 2021-02-09 |
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| CN202020929782.8U Active CN212509142U (en) | 2020-05-28 | 2020-05-28 | Improve shield tunnel toughness performance's bolt structure and bolt |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111536129A (en) * | 2020-05-28 | 2020-08-14 | 天津大学 | Improve shield tunnel toughness performance's bolt structure and bolt |
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2020
- 2020-05-28 CN CN202020929782.8U patent/CN212509142U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111536129A (en) * | 2020-05-28 | 2020-08-14 | 天津大学 | Improve shield tunnel toughness performance's bolt structure and bolt |
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