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Test device for simulating dynamic soil arching effect of shed frame structure

A technology of soil arching effect and test device, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of poor safety, long construction period, high cost, etc., and achieve the effect of reducing errors

Active Publication Date: 2020-03-31
HEBEI INSTITUTE OF ARCHITECTURE AND CIVIL ENGINEERING
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] If the field measurement or full-scale test is used to analyze and test it, the construction period will be longer, the cost will be higher, the safety will be poor, and the analysis of multiple working conditions will not be possible. A series of problems, the final conclusion is less controllable

Method used

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  • Test device for simulating dynamic soil arching effect of shed frame structure
  • Test device for simulating dynamic soil arching effect of shed frame structure
  • Test device for simulating dynamic soil arching effect of shed frame structure

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Embodiment Construction

[0043] Below, the present invention is described in detail with reference to accompanying drawing and embodiment:

[0044] Such as Figure 1~4 As shown, a test device for simulating the dynamic soil arch effect of a scaffolding structure includes a concrete base 12 on which a model box frame 5 is arranged, and the model box frame 5 is built with surrounding rock 11, sand 10, Subgrade 4, a scaffold structure simulating an advanced scaffold structure is arranged between the surrounding rock 11 and the sand 10,

[0045] A dowel bar 16 loaded by the actuator 1 is arranged above the roadbed 4 , and a sensor for collection is also arranged inside the model box frame 5 .

[0046] The actuator 1 is arranged on a crossbeam 14 , and the crossbeam 14 is fixed between two steel frame columns 2 .

[0047] A plurality of rows of assembly holes for adjusting and installing the height of the crossbeam 14 are formed on the upper part of the steel frame column 2, and the high-strength bolts 3...

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Abstract

The invention discloses a test device for simulating a dynamic soil arching effect of a shed frame structure. The device comprises a concrete base, a model box frame is arranged on the concrete base,surrounding rock, sand and a roadbed are arranged in the model box frame, a shed frame structure simulating an advanced shed frame structure is arranged between the surrounding rock and the sand, a dowel bar loaded by an actuator is arranged above the roadbed, and a sensor for collection is further arranged in the model box frame. According to the invention, loading equipment is introduced into the pipe shed soil arching effect test for the first time, and meanwhile, various monitoring equipment is adopted to monitor deformation and stress strain in the test process, so that the dynamic soil arching effect in actual engineering is reflected more truly. Based on the method, the mutual relation between the pipe shed parameters and the traffic load amplitude frequency can be further obtained,suggestions are provided for design optimization of the pipe shed parameters, and therefore construction safety in the tunnel excavation process is guaranteed.

Description

technical field [0001] The invention belongs to the field of tunnel engineering, and in particular relates to a test device for simulating the dynamic soil arch effect of a scaffolding structure. Background technique [0002] The soil arching effect is a common phenomenon in the field of civil engineering, and it widely exists in the interaction between soil and structure. The soil is compressed and deformed under the action of load or self-weight, resulting in uneven settlement, causing the soil particles to "wedge" each other, and then produce an "arch effect" in a certain range of soil layers. [0003] At present, the advanced scaffolding technology is a common underground excavation construction method under the existing traffic lines. However, due to the large bending stiffness of the steel pipe itself and the high embedded effect of the scaffolding structure, the upper rock and soil mass in the When the self-weight and additional stress decrease, a certain degree of u...

Claims

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Application Information

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IPC IPC(8): G01N3/00G01N3/06G01N3/02
CPCG01N3/00G01N3/068G01N3/066G01N3/06G01N3/02G01N2203/0208G01N2203/0682G01N2203/0647G01N2203/0641
Inventor 董捷杨博李成献张壮董少华
Owner HEBEI INSTITUTE OF ARCHITECTURE AND CIVIL ENGINEERING
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