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Overburden pressure loading device applied to geotechnical vibration table test

A technology of shaking table test and loading device, used in soil material testing, material inspection products, etc., can solve problems such as failure to reflect stress state, prototype structure and foundation soil seismic performance disputes, and achieve simple and flexible loading methods and extended depth. , The effect of the simple structure of the device

Inactive Publication Date: 2015-01-14
NANJING HYDRAULIC RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the shaking table test can better reflect the seismic performance of the model, the test of the model cannot reflect the actual stress state, so there is still a lot of controversy about the seismic performance of the estimated prototype structure and foundation soil

Method used

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  • Overburden pressure loading device applied to geotechnical vibration table test
  • Overburden pressure loading device applied to geotechnical vibration table test

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Experimental program
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Embodiment Construction

[0023] Further description will be made below in conjunction with the embodiments and accompanying drawings.

[0024] Such as figure 1 As shown, the geotechnical shaking table test is covered with a pressure loading device 100, which is composed of a model box 1, an air bag 2, an air source 3 and a gland 4. The model box 1 is also provided with a horizontally extending upper protective layer 8a and a lower protective layer 8b. , the airbag 2 is arranged in the space surrounded by the upper protective layer 8a and the lower protective layer 8b, and is connected with the gas source 3 through the pipeline 5, and the gland 4 covers the mold box mouth 11 and is fixedly connected with the mold box wall 12.

[0025] The gas source 3 can be a high-pressure gas cylinder or an air pump. The gas source 3 has a pressure regulating valve 6 and a pressure gauge 7. The gas source 3 supplies gas to the air bag 2 through the pressure regulating valve 6. The air bag 2 combines the gland 4 to ap...

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Abstract

The invention discloses an overburden pressure loading device applied to a geotechnical vibration table test. The overburden pressure loading device comprises a model box, an air bag, an air source and a pressing cover, wherein the air bag is arranged inside the model box and is connected with the air source by virtue of a pipeline; the pressing cover covers an opening of the model box and is fixedly connected with the wall of the model box. By virtue of the overburden pressure loading device applied to the geotechnical vibration table test, the depth of foundation soil researched in an existing vibration table test can be effectively expanded, and thus technical support is provided for deeply researching the dynamic characteristics of deep soil.

Description

technical field [0001] The invention relates to a device for simulating the overlying pressure of a soil body in a geotechnical vibrating table test, and belongs to the technical field of test devices. This equipment is especially suitable for simulating the overlying pressure of the soil in the geotechnical shaking table test and geotechnical centrifuge shaking table test. It can not only simulate the base pressure of buildings (structures), but also simulate the self-weight of the overlying soil acting on the deep covering layer. stress. The device can simulate the additional stress of the soil or the effective stress of the deep soil without increasing the load bearing of the shaking table, and 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 pr...

Claims

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Application Information

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IPC IPC(8): G01N33/24
Inventor 武颖利张世殊蔡正银王志华曲海珠周彦章马金根徐海洋任国峰许振巍张鑫磊
Owner NANJING HYDRAULIC RES INST
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