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Multi-stage yielding steel arch limiter and construction method

A steel arch frame and limiter technology, which is applied in earthwork drilling, shaft equipment, wellbore lining, etc., can solve problems such as complex construction environment, collapse, and no effective support for surrounding rocks

Pending Publication Date: 2022-08-02
CCCC SECOND HARBOR ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a multi-level steel arch limiter and construction method to solve the problem that the double-layer arch itself has more construction procedures, the construction environment is more complicated, and the site man-machine material construction organization requires more High-level features, it is easy to cause the second-story arch to be constructed in time, and the surrounding rock is not effectively supported when the first-story arch structure is damaged, causing collapse accidents

Method used

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  • Multi-stage yielding steel arch limiter and construction method
  • Multi-stage yielding steel arch limiter and construction method
  • Multi-stage yielding steel arch limiter and construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] like Figure 1~17 As shown in the figure, a multi-stage pressure steel arch stopper, a plurality of steel arches form an annular steel arch 1, and adjacent steel arches are connected by a stopper 2, and the stopper 2 includes a pressure element steel The column 201 and the pressure element steel cylinder 202, the pressure element steel column 201 is sleeved inside the pressure element steel cylinder 202, the sand 8 is placed between the pressure element steel cylinder 202 and the pressure element steel column 201, and the pressure element steel cylinder There is a pressure relief hole 203 on one side of the bottom of the 202, and a deformation piece 5 is arranged inside the steel cylinder 202 of the pressure receiving element. There are strain gauges 6 , the steel column 201 of the pressure element is compressed to cause the deformation element 5 to deform and leak out of the pressure relief hole 203 , and the sand 8 leaks from the steel cylinder 202 of the pressure ele...

Embodiment 2

[0058] like Figures 14~17 As shown, the specific structure of the deformation member in the preferred solution of this scheme is a cylindrical deformation block 10, the deformation member 5 is a cylindrical deformation block 10, and the cylindrical deformation block 10 is a cylindrical structure, and the diameter of the cylinder is larger than the diameter of the pressure relief hole 203. , the bottom of the cylindrical structure is connected to the mounting seat 1002 of the rectangular structure. The deformation block structure of the cylinder has good deformation effect. The deformation block is mainly made of rubber. The steel column 201 of the pressing element is pressed to compress the sand 8. The pressing force of the sand 8 presses the cylindrical deformation block of the cylindrical structure from the periphery. 10. The cylindrical deformation block 10 is less compressed and leaks out of the pressure relief hole 203, wherein the cylindrical deformation block 10 has a ...

Embodiment 3

[0063] like Figures 9~13 As shown, the specific structure of the deformation piece in the preferred solution of this scheme is a rectangular deformation block 9, the deformation piece 5 is a rectangular deformation block 9, the two sides of the rectangular deformation block 9 are provided with arc chamfering surfaces, and one end of the rectangular deformation block 9 is against the The other end of the pressure relief hole 203 of the steel cylinder 202 of the pressure receiving element is provided with a chamfered surface with a circular arc inclined, and the end of the inclined chamfered surface with a circular arc is provided with a first folding plate 902 bent downward. The rectangular deformation block 9 has a flat structure. The upper surface of the rectangular deformation block 9 is the main pressure area, and the rear and both sides are designed with circular arcs, which is to make the multi-directional pressure more uniform and to make the deformation of the rectangul...

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Abstract

The invention provides a multistage yielding steel arch limiter and a construction method, an annular steel arch is formed by a plurality of steel arches, the adjacent steel arches are connected through the limiter, the limiter comprises a pressing element steel column and a pressed element steel cylinder, the pressing element steel column is sleeved with the pressed element steel cylinder, and the pressed element steel cylinder is sleeved with the pressed element steel cylinder. Sand is placed between the interior of the compression element steel cylinder and the compression element steel column, a pressure relief hole is formed in one side of the bottom of the compression element steel cylinder, a deformation piece is arranged in the compression element steel cylinder, the deformation piece is arranged on one side of the pressure relief hole and covers the pressure relief hole, a strain gauge is arranged at the bottom of the deformation piece, and the compression element steel column is compressed to enable the deformation piece to deform and be exposed out of the pressure relief hole. And the sand leaks from the pressed element steel cylinder for pressure relief. A sand material is adopted as a pressure-bearing main body and is matched with a rubber deformation part, and a stable automatic pressure relief system is arranged by utilizing the fluidity of sand and the deformation characteristic of rubber, so that the stopper arch frame slowly and stably releases the stress of original rock while keeping certain supporting resistance to surrounding rock.

Description

technical field [0001] The invention relates to the field of steel arch frame construction, in particular to a multi-stage pressure-reducing steel arch frame stopper and a construction method. Background technique [0002] In the process of tunnel excavation, due to the influence of geological structure, burial depth and other factors, it often leads to large deformation of soft rock with high geostress, resulting in a series of engineering accidents. In order to solve the problem of large deformation and block of soft rock tunnels under the condition of high in-situ stress, the "combination of release-resistance" support method using pressure to release the high in-situ stress of the original rock was proposed in the project. At present, the commonly used construction techniques mainly include double-layer initial support Arch support, in which the first layer of arches with low rigidity releases part of the stress with the deformation of the surrounding rock until it is de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/22
CPCE21D11/22
Inventor 张亚平王添新徐庭易帅万猛薛克进陈丹王建涛肖诗辉张晓光孙延波孙小强冉路尧李鸿飞刘康
Owner CCCC SECOND HARBOR ENG