Geotechnical engineering shaking table test overburden pressure loading method

A shaking table test and pressure technology, applied in vibration test, machine/structural component test, measurement device, etc., can solve the disputes of seismic performance of foundation soil, and achieve the effect of expanding depth and simple and flexible loading method.

Inactive Publication Date: 2015-01-28
NANJING HYDRAULIC RES INST
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  • Abstract
  • Description
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Problems solved by technology

Although the shaking table test can better reflect the seismic performance of the model, there are still great disputes a

Method used

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  • Geotechnical engineering shaking table test overburden pressure loading method

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Embodiment Construction

[0024] Further description will be made below in conjunction with the embodiments and accompanying drawings (please refer to figure 1 The text marks in are modified to the numbers in the examples. ).

[0025] The overlying pressure loading method of the geotechnical shaking table test includes the following steps:

[0026] Step 10 Set the soil body 9 in the model box 1;

[0027] Step 20 Set horizontally extending upper protective layer 8a and lower protective layer 8b above the soil body 9, set the airbag 2 in the space surrounded by the upper and lower protective layers 8a, 8b and the model box wall 12, and the airbag 2 passes through the pipeline 5 It is connected with the air source 3 outside the model box 1, and the air source 3 can be a pressure source such as a high-pressure gas cylinder or an air pump;

[0028] Step 30 Set the gland 4 at the model box opening 11, make the gland 4 cover the model box opening 11, and connect the gland 4 and the model box 1 with bolts 1...

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Abstract

A geotechnical engineering shaking table test overburden pressure loading method includes the following steps of Step 10, arranging a soil mass in a model box; Step 20, arranging an air bag connected to an air supply outside the model box through a line above the soil mass; Step 30, arranging a pressure cover at an opening of the model box to cover the opening of the model box and fixedly connecting the pressure cover with the model box; Step 40, opening the air supply to load air pressure to the air bag and regulating the air bag pressure as needed through a pressure regulating valve to obtain the required loading pressure. The geotechnical engineering shaking table test overburden pressure loading method can effectively extend the depth of the foundation soil mass to be researched of an existing shaking table test, thereby providing technical support for in-depth study of the dynamic characteristics of the deep soil mass.

Description

technical field [0001] The invention relates to a loading method used for geotechnical shaking table tests to simulate soil overlying pressure, and belongs to the field of test methods. This method can effectively solve the problem that the geotechnical shaking table test cannot reflect the change of soil stress state. This method can not only simulate the base pressure of buildings (structures), but also simulate the self-weight stress of the overlying soil acting on the deep overburden layer. It provides important technical support for further research on the soil dynamic characteristics test under a certain stress level. Background technique [0002] The site conditions of the in-situ test are completely real, and the test results are relatively reliable. However, for problems such as blasting, pollutant diffusion, and earthquake damage, due to the complex environmental medium, strong interaction between multi-phase and multi-field, and large time-space span, full-scal...

Claims

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Application Information

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IPC IPC(8): G01M7/06G01V1/00
Inventor 蔡正银张世殊武颖利胡金山徐光明谢洪毅黄英豪顾行文关云飞李小梅
Owner NANJING HYDRAULIC RES INST
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