Method for obtaining mechanical behavior of pulloutof planar geosynthetics-soil interface

Abstract

The invention relates tomethod for obtaining mechanical behavior of pulloutof a planar geosynthetics-soil interface. The method for obtaining mechanical behavior of pulloutof the planar geosynthetics-soil interface comprises the steps that (1) under a certain overburden pressure, the geosynthetics-soil interface of reinforced soil structure is subjected to a pullout test to obtain load-displacement curve data; (2) three feature points are taken in the obtained load-displacement curve, and the values of the three points are put into a calculation formula to determine control parameters; (3) thecontrol parameters are put into a model calculation formula to determinemechanical behavior curves of each stage such as the load-displacement curve, the shearing stress distribution, and the internal displacement distribution, and a complete mechanical behavior characteristic curve is obtained; (4) under other overburden pressures, the control parameters of the step (2) are converted and put intothe step (3) again to obtain various mechanical behavior characteristic curves under other overburden pressures. Compared with the prior art, the method for obtaining mechanical behavior of pulloutofthe planar geosynthetics-soil interface determinesrequired pullout parameters through implementation of only one pullout test, and a good geosynthetics-soil interface pullout mechanical behavior canbe obtained.

Description

technical field [0001] The invention relates to the technical field of reinforced soil structures, in particular to a method for obtaining the pulling-out mechanical behavior of a planar reinforcement-soil interface. Background technique [0002] Reinforced soil technology is widely used in civil engineering construction. As an important reinforcing material, geosynthetics are widely used in reinforced soil engineering practice due to their superior engineering properties, and the research on the interface effect of geosynthetics reinforced soil has gradually become the focus of geotechnical engineering research. a hot spot. Scholars at home and abroad have done a lot of research on the interaction mechanism of reinforced soil-reinforced soil interface. However, due to the many factors affecting the characteristics of reinforced soil-reinforced soil interface, the interface mechanism is very complicated, especially for reinforced coarse-grained soil. The research on the me...

AI Technical Summary

Problems solved by technology

The conventional pull-out test is easy to obtain the pull-out load-displacement curve, but to obtain the shear stress, axial force, and internal displacement distribution and evolution law, it is necessary to install a large number of monitoring components such as strain gauges and flexible displacement meters. Complete data can only be obtained by doing several sets of pull-out tests under different overlying load conditions. At the same time, this test has the disadvantages of long cycle, high cost, difficult monitoring, and unstable monitoring.

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