Tester for interface of different materials under point/rectangular load and photoelastic test method

Abstract

The invention discloses a tester for an interface of different materials under a point / rectangular load and a photoelastic test method. The tester comprises a test platform, a model box device, and a loading system, wherein the model box device is arranged on the test platform; the model box device and the test platform are horizontally arranged; and the loading system is arranged on the upper part of the test platform to load / unload the point / rectangular load on / from the model box device. The photoelastic test method comprises the following steps of: building and regulating a model test platform according to test requirements, processing a model material, arranging a cross cursor, and mounting and regulating the model box device; selecting and regulating the loading system; and post-processing test data by using a noncontact photoelectric data acquisition system and combining reference proportion base points. The invention can acquire stress transmission and deformation data in a model material, particularly the stress transmission and deformation data of the interface of two different materials in real time, and provides accurate test data for corresponding theoretical and actual engineering research.

Description

technical field [0001] The invention belongs to the field of foundation and foundation engineering test research, in particular to a method for synchronizing the boundary layer stress field and displacement field for simulating the transmission mechanism and deformation analysis of the additional stress of the boundary layer under multi-point (rectangular) loads of materials with different foundation soil properties The test device and method of measurement. Background technique [0002] According to the State Council's "Medium and Long-Term Railway Network Planning", by 2020, my country's railways will build "four vertical and four horizontal" railway express passenger transport channels and three intercity passenger transport systems in the Bohai Rim, Yangtze River Delta, and Pearl River Delta areas, and build passenger dedicated lines 1.6 More than 10,000 km. In addition, in order to improve the railway freight transportation capacity, during the "Eleventh Five-Year Plan"...

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Problems solved by technology

Continuous features and bulk features can be converted to each other under certain conditions, but the mechanism is extremely complicated

The existing foundation additional stress and settlement calculation theory is based on the continuum mechanics theory for relatively many studies on horizontal stratification, but combined with the granular material mechanics theory for different structures, different foundation treatment forms, different foundation properties and other conditions The additional stress distribution and transmission in the vertical interface layer and the calculation of foundation settlement (deformation) are seldom studied, especially for the lack of understanding of the mechanical mechanism of uneven foundation settlement under embankment loads, only qualitative understanding, so At this stage, there is no additional stress and settlement calculation method for uneven subgrade settlement

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