Variable-diameter cement-soil mixing pile model test device

Abstract

The invention provides a variable-diameter cement-soil mixing pile model test device which comprises a numerical control platform module. The numerical control platform module is in signal connection to a grouting and powder spraying module, a temperature control module, a test box module and a cement-soil mixer module. One side of the cement-soil mixer module is connected to the grouting and powder spraying module through a grouting pipe, the bottom of the cement-soil mixer module is connected to the test box module, and the test box module is connected to the temperature control module. According to the variable-diameter cement-soil mixing pile model test device, construction of a cement-soil mixing pile under actual working conditions is simulated, the lifting speed and the mixing speed of a mixer and the grouting and powder spraying speed of the grouting and powder spraying module are controlled through the numerical control platform module, meanwhile, soft soil in the test box body can be heated and refrigerated, and the piling effects in different seasons and different temperature conditions are simulated, a basis is provided for engineering practice, operation is convenient, manpower and material resources are saved, resources are saved, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of test equipment for construction, in particular to a variable-diameter cement-soil mixing pile model test device. Background technique [0002] Cement-soil mixing pile is a way of foundation treatment. It uses cement as a curing agent. Through special mixing machinery, the curing agent is mixed with the surrounding soil by spraying grout deep in the foundation, and then physical and chemical reactions occur. , making the soft soil harden into an excellent foundation with integrity, water stability and certain strength. The cement-soil mixing pile was first successfully developed in Sweden. In China, in 1977, the General Building Research Institute of the Ministry of Metallurgy and the Water Transport Planning and Design Institute of the Ministry of Communications carried out indoor experiments and mechanical development. In 1980, it was successfully applied in the soft soil foundation reinforcement projec...

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Problems solved by technology

At present, many studies on cement-soil mixing piles are still in the finite element or field test stage. In the finite element research, the parameter selection is quite different from the field and cannot accurately represent the actual situation, which makes the results obtained by the finite element method far from the actual working conditions. ;In the field test, the demand for manpower and material resources is large, the test cost is high, and the change of the field environment has a great impact on the test results, so it is imperative to develop indoor model tests

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