Multifunctional test device and test method for simulating foundation load

Abstract

The invention belongs to the technical field of geotechnical engineering, and particularly relates to a multifunctional test device for simulating a foundation load. The multifunctional test device comprises a test box body for containing a sample; a portal frame is erected at the upper part of the test box body; a jack is arranged on the portal frame, and is vertically arranged and is positionedin the center of the test box body; the upper end of the jack is fixed with the portal frame; the lower end of the jack is detachably connected with a cover plate; the size of the cover plate is matched with an inner cavity of the test box body; a load sensor is arranged on the cover plate; a soil layer deformation tester, a pore water pressure meter and a soil pressure meter are arranged in the sample; and the soil layer deformation tester, the pore water pressure meter, the soil pressure meter, the load sensor and the jack are electrically connected with an external controller. The device can simulate the whole treatment process of soil with various properties and different foundations, can test the development and change of rock-soil parameters of foundation treatment for a long time, can perform load test on the bearing capacity of a consolidated or reinforced foundation, and is simple in structure and intuitive and reliable in test.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and in particular relates to a multifunctional test device and a test method for simulating foundation load. Background technique [0002] Our country has a vast territory, and there are many types of foundation soils. There are many weak foundations and special foundations. These foundations often cannot meet the requirements of bearing capacity and deformation, and buildings can only be built on them after artificial reinforcement. The purpose of foundation treatment is to improve the engineering properties of the foundation soil through foundation treatment technologies such as preloaded drainage consolidation, compacted cement-soil piles, compaction piles, and cement-soil mixing piles, such as improving the shear strength, compressibility, and permeability characteristics of the foundation soil. Wait. In the process of foundation treatment, the stress in the soil, pore water...

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Problems solved by technology

[0003] At present, in the teaching and scientific research of geotechnical engineering, there is no system that can systematically and comprehensively simulate the whole process of various soil properties and different foundation treatments, and test the development and changes of geotechnical parameters of foundation treatments for a long time (including: pore water pressure, earth pressure, etc.). , soil layer deformation and ground subsidence and other parameters such as time and space changes), and a multi-functional experimental device that can perform load tests on the load-bearing capacity of the consolidated or reinforced foundation

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