Shed frame test method in pilot tunnel digging technology

A test method and scaffolding technology, which are applied in the testing of mechanical parts, the testing of machine/structural parts, and the use of stable tension/pressure to test the strength of materials, etc. problems such as unpredictable frame damage, to achieve the effect of providing safety and reducing construction costs

Active Publication Date: 2019-06-14
中煤建工集团有限公司
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Problems solved by technology

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies: the damage caused by the impact of the su

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  • Shed frame test method in pilot tunnel digging technology
  • Shed frame test method in pilot tunnel digging technology
  • Shed frame test method in pilot tunnel digging technology

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[0031] The specific embodiments of the present invention will be described in further detail below in conjunction with the drawings and embodiments. The following examples are used to illustrate the present invention, but not to limit the scope of the present invention.

[0032] During the excavation of the pilot tunnel, the top scaffold is first used for support, and the top of the cave is supported to prevent construction accidents such as collapse. The top scaffold needs to meet structural requirements such as strength and rigidity to achieve the supporting function. However, most of the current structural strength of the scaffolding is obtained through structural calculations or construction experience. The actual stress state of the scaffold has not been tested and verified, and the strength of the scaffolding structure may be wasted or the scaffolding structure cannot meet the requirements. Support stability requirements and other issues. Therefore, it is necessary to test...

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Abstract

The invention relates to the field of engineering construction, and provides a shed frame test method in a pilot tunnel digging technology. The method comprises the following steps that: test device building: a flattop shed frame is supported and fixed, a prefabricated bracket is supported and fixed below the flattop shed frame, and a pressure-bearing, height-regulation and force measurement device is arranged between the flattop shed frame and the prefabricated bracket, wherein the pressure-bearing, height-regulation and force measurement device has the functions of pressure bearing, height regulation and multidirectional force measurement; a loading process: the flattop shed frame loads preset pressure, meanwhile, the pressure-bearing, height-regulation and force measurement device provides supporting force, initial supporting force and pressure borne by the flattop shed frame are the same and have opposite directions; and unloading and regulation: supporting force provided by the pressure-bearing, height-regulation and force measurement device on a target position is regulated according to a surrounding rock load releasing rule. The invention provides the shed frame test methodin the pilot tunnel digging technology, the stress deformation state of the shed frame under surrounding rock pressure in different digging technologies and digging stages can be accurately obtained for guiding the structural design and the remediation repair of the shed frame, and construction cost is effectively reduced.

Description

technical field [0001] The invention relates to the field of engineering construction, in particular to a scaffold test method in a pilot tunnel excavation process. Background technique [0002] With the rapid development of my country's infrastructure construction, a large number of tunnels have been excavated, and the geological conditions encountered in the process of tunnel excavation have become increasingly complex, and the overall tunnels have shown a development trend of "many, long, large, and deep". During the excavation of the tunnel, the underground structure is damaged, and the underground structure has the problems of hidden damage and difficult repair. Therefore, in the process of underground construction, it is necessary to do a good job of supporting work, but the requirement for supporting strength is high, and the construction cost will increase accordingly. Therefore, in order to ensure the strength of the support and reduce the construction cost, it is n...

Claims

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Application Information

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IPC IPC(8): G01M13/00G01N3/08
Inventor 陈向红袁鹏郭俊杰
Owner 中煤建工集团有限公司
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