Method and device for testing large horizontal displacement of soil when laminated shear-type model soil box is applied to shaking table test of underground structure

Abstract

The invention provides a soil horizontal large displacement test method and device when a laminar shear model soil box is applied to the underground structure shaking table test, and belongs to the technical field of civil engineering. The device comprises a laminar shear model box (1) and a displacement test system (3). The displacement test system(3) comprises a displacement record writing bench (4), a displacement conveyer (5) and a model box and displacement test system connecting device (6). The displacement conveyer (5) is fixedly connected with the laminar shear model box (1), and is movably connected with the displacement record writing bench (4); and the displacement record writing bench (4) is fixedly connected with the laminar shear model box (1) through the model box and displacement test system connecting device (6). The large displacement test method and device overcome the problems that, in the model test, it is difficult to install contact type displacement sensors and non-contact type displacement sensors require highly for the imaging technique and need later-period data processing, are simple and high in reliability, and are easy to carry out.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and relates to a method and a device for testing large horizontal displacement of soil when a laminated shear type model soil box is applied to a shaking table test of an underground structure. Background technique [0002] Large-scale rail transit construction makes it inevitable that the subway station structure will pass through the liquefiable soil layer. Since the 1980s, through a series of earthquake damage investigations, it has been concluded that the main cause of severe damage to buildings, bridges, dams, underground structures and other structures during earthquakes is the large lateral displacement caused by soil liquefaction. Only when the deformation caused by liquefaction It is enough to endanger the safety of buildings or cause harm when it is used normally. Therefore, the core of the research on liquefaction is the deformation development process. The research on the d...

AI Technical Summary

Problems solved by technology

To overcome the above deficiencies and solve the measurement problem of large shear deformation of soil under vibration conditions

Images