Device and method used for water permeability concrete pile blocking test under seismic action

Abstract

The invention relates to a device and method used for a water permeability concrete pile blocking test under seismic action. The device and method used for the water permeability concrete pile blocking test under the seismic action lay a foundation for the research of the blocking principle of a water permeability concrete pile in liquefiable soil under the seismic action by simulating the whole water permeability concrete pile blocking process through the testing of the permeability coefficient of a water permeability concrete sample in the liquefiable soil and the change of the electrical resistivity of a saturated sample under the seismic action. The device comprises a vibration table used for simulating the seismic action, wherein a sleeve is placed on the vibration table, a liquefiable soil sample is arranged in the sleeve, the water permeability concrete sample is arranged below the liquefiable soil sample, pressure gage preformed holes are formed in the sleeve wall and located above the water permeability concrete sample and below the water permeability concrete sample respectively, pressure gages are installed on the pressure gage preformed holes to measure the pressure difference between the upper side of the water permeability concrete sample and the lower side of the water permeability concrete sample, electrical resistivity detecting devices are further arranged at the upper end of the water permeability concrete sample and at the lower end of the water permeability concrete sample respectively, a drainage pipe used for controlling drainage is arranged on the lower portion of the sleeve, a flow detection device is arranged on the drainage pipe, and a water inlet and an overfall gap are further formed in the upper portion of the sleeve.

Description

Technical field: [0001] The invention relates to a plugging test device and method of permeable concrete piles under earthquake action, belonging to the field of civil engineering. Background technique: [0002] Sandy soil liquefaction refers to the phenomenon that loose powder and fine sandy soil saturated with water are suddenly destroyed under the action of vibration and become liquid. If the permeable concrete pile is used to treat the liquefiable soil foundation, when an earthquake occurs, the sand particles will enter the permeable concrete pile and block the permeable concrete pile, affecting its performance. Therefore, it is very necessary to study the clogging mechanism of permeable concrete piles in liquefiable soils under earthquake action, but there is currently a lack of experimental simulation devices and methods for clogging test of permeable concrete piles in liquefiable soils under earthquakes. Invention content: [0003] The purpose of the present invent...

AI Technical Summary

Problems solved by technology

If permeable concrete piles are used to deal with liquefiable soil foundations, when earthquakes occur, sand particles will enter the permeable concrete piles and block the permeable concrete piles, affecting their performance

Therefore, it is very necessary to study the clogging mechanism of permeable concrete piles in liquefiable soils under earthquake action, but there is currently a lack of experimental simulation devices and methods for clogging of permeable concrete piles in liquefiable soils under earthquakes

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