Reinforced earth retaining wall model test apparatus and method

Abstract

The invention discloses a reinforced earth retaining wall model test apparatus and method. The apparatus includes: a model case (1), a retaining wall panel (5), filling materials (7), a vertical load loading system (10) and a testing system. The filling materials (7) are put inside the model case (1). The retaining wall panel (5) is arranged in front of the model case (1). The vertical load loading system (10) is arranged above the model case (1) and applies vertical pressure to a model. According to the invention, the filling materials (7) are made of mixed cast-steel shots which have a density between 5.2g/cm<3> to 7.0g/cm<3> and an internal friction angle between 28 DEG to 35 DEG. The density of the mixed cast-steel shots is 3-4 times greater than that of ordinary sand filling materials, and the internal friction angle of the mixed cast-steel shots is similar to that of ordinary sands. A stress field is made equivalent by increasing the density of the filling materials, so that the stress state of the filling materials of a retaining wall is made to be equivalent, and the stress and deformation characteristics of the model can be measured effectively. The filling materials can be used repeatedly for many times, which significantly reduces the cost of the testing.

Description

technical field [0001] The patent of the invention relates to the technical fields of geotechnical engineering and road engineering, in particular to a model test device and method for a reinforced soil retaining wall. Background technique [0002] Reinforced earth retaining wall structure has developed rapidly since its appearance in the 1960s. It is often used in filling projects such as railways, highways, and docks. Its design theory still needs further research. The experimental research of retaining wall is mainly divided into prototype test and scale model test; prototype test can best reflect the real force and deformation of the structure, but prototype test requires a lot of manpower and material resources, which is expensive and expensive, which limits its application . The scale model test is an important method to study the structure of the retaining wall, and the key to adopt the scale model is to reasonably equivalent the stress field inside the model. Obvio...

AI Technical Summary

Problems solved by technology

Therefore, in the centrifugal model test, this shortcoming can only be reduced by making the model very small, but if the size of the model is too small, the arrangement of sensors inside the model is limited, so that the stress and strain inside the model cannot be accurately and comprehensively obtained

Moreover, equipment for centrifuge model tests is expensive to manufacture, maintain and use

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