Method and device for sand liquefaction and water supply in pile-soil interaction shaking table test

Abstract

The invention relates to a sandy soil liquefaction and water feeding method and device used for a pile soil interaction shaking table test. The method comprises the following steps: 1, a steel box is provided, a pile is vertically arranged at the center of the inner cavity of the steel box; 2, at least one hard water inlet pipe is vertically fixed to the inner wall of the steel box; 3, at least one sandy soil layer and at least one clay layer are sequentially contained in the steel box from bottom to top, corresponding water outlet hoses are horizontally laid at the predetermined height positions in all sandy soil layers during containing, meanwhile the water inlet ends of the water outlet hoses of all layers are connected with the lower end of the corresponding hard water inlet pipes, a plurality of small water outlet holes are evenly formed in the peripheral sides of the water outlet hoses to achieve fixed-point sandy soil liquefaction; 4, the upper ends of the hard water inlet pipes are connected to corresponding water inlet hoses, and water meters are installed on the water inlet hoses to achieve quantitative water feeding. By means of the sandy soil liquefaction and water feeding method and device, quantitative water feeding and liquefaction of predetermined sandy soil layers are achieved, operating difficulty is reduced, experiment cost is reduced, and the accuracy of sandy soil water content situation of a sandy soil liquefaction test is improved.

Description

technical field [0001] The invention relates to a sandy soil liquefaction and water supply method and device in a pile-soil interaction shaking table test, which is especially suitable for an earthquake simulation shaking table pile-soil interaction test. Background technique [0002] Sand is widely distributed in China. Under the action of earthquakes, some sand may liquefy. Especially in recent years, earthquakes have been quite frequent. Sand liquefaction has brought huge economic losses and casualties to human beings. Sand in some areas Soil liquefaction is even more harmful than the earthquake itself. Therefore, it is very important to study the phenomenon of sand liquefaction under the action of earthquakes. The water content of sand to simulate sand liquefaction in the laboratory must be strictly controlled, so quantitative water supply devices are particularly important. [0003] However, the existing technical standards and specifications at home and abroad do not ...

AI Technical Summary

Problems solved by technology

[0003] However, the existing technical standards and norms at home and abroad do not provide clear regulations on the sand water adding device, but only put forward a certain range for the amount of water added.

Many sand liquefaction experiments at home and abroad have pointed out that water content is more or less one of the key factors in the experiment, but did not give a convenient and feasible method

Images