Pile-supported embankment transparent soil model testing device and method

Abstract

The invention discloses a pile-supported embankment transparent soil model testing device and method. The device comprises a model groove, transparent soil, a pile body, a water bag, a water pipe, an industrial camera, and a laser emitter. The box-type water bag is placed on the bottom of the model groove made of organic glass. A pile hole position is reserved in the box-type water bag. A pile hole is reserved in the box-type water bag. A pile can be inserted into the pile hole in the box-type water bag. Under the assistance of transparent soil, the soil arch effect of embankment soil under self-weight load can be simulated by discharging the water in the box-type water bag. The invention also discloses a testing method of the testing device. The testing method comprises steps of installing pile and water bag, constructing a transparent soil embankment, slowly discharging water from the water bag, taking pictures of the laser plane by the industrial camera during the water discharging process, and analyzing the pictures to obtain the three dimensional deformation characteristics. The provided device and method have the advantages that high precision realtime measurement on the internal deformation of soil can be achieved, the macroscopic shape change of spacial soil arch can be observed, multiple work conditions can be simulated, the size of the testing device is small, the test operation is convenient, and the efficiency is improved.

Description

technical field [0001] The invention belongs to a model test device in the technical field of soft soil foundation treatment, in particular to a device and method for a transparent soil model test of pile-supported embankment soil arching effect. Background technique [0002] In soft soil areas, due to the high water content of the soil, the small compressive modulus of the soil, and the low strength of the soil, infrastructure, such as high-speed railways and expressways, often encounter problems such as excessive settlement and insufficient foundation bearing capacity. Therefore, most engineering constructions in soft soil areas require foundation treatment. [0003] Rigid pile-supported embankment is a form of embankment in which rigid piles with pile caps are used as the subgrade. In engineering practice, the center distance of rigid piles is generally between 2.5 and 5 times the pile diameter. In this kind of embankment structure, the piles and the soil between the pi...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome that the traditional pile-supported embankment model test cannot directly observe the internal deformation of the embankment soil and the macroscopic displacement form of the space soil arch, and propose a pile-supported embankment transparent soil model test device, which can realize various engineering Conditions, including different pile cap sizes, with or without hanging mesh reinforcement, pile piercing soft soil layer and no piercing, etc. common working conditions in actual engineering; the model test uses PIV technology to observe the internal displacement of transparent soil with high precision; the device Small size, short test preparation time, convenient test operation, not only improves the efficiency of scientific research, but also can be used as a teaching instrument

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