Thermal consolidation experiment model device of soft clay

Abstract

The invention discloses a thermal consolidation experiment model device of soft clay. The thermal consolidation experiment model device comprises a base, a top cover, an internal barrel and an external barrel, wherein the internal barrel sleeves the external barrel, the top cover is arranged at upper ends of the internal barrel and the external barrel, the base is arranged at lower ends of the internal barrel and the external barrel, the base and the top cover are in bolt connection with the external barrel by at least three anchor rods to encircle, a drainage plate is arranged in the internalbarrel, a conductive wire is wound around an outer wall of the internal barrel, an iron rod is arranged in the drainage plate, a piston is arranged at an upper end of the internal barrel, a sleeve groove is formed in the center of the piston and is matched with the drainage plate, a wire through hole is formed in a top end of the sleeve groove, the sleeve groove sleeves the drainage plate and cando upward and downward motion so as to compress soil in the internal barrel, the iron rod and the conductive wire are respectively connected with a positive electrode and a negative electrode of a power supply, an air pressure cavity is encircled and formed between the piston and the internal barrel, an air injection small hole is formed in the bottom cover, a pressurization pump is connected with the air injection small hole by a pipeline, and the pressurization pump is inflated to simulate pile-loading pressure. By the method, the problems of air leakage under vacuum preloading, vacuum degree reduction and non-uniform heating of soil around a manhole during the thermal consolidation process are solved.

Description

technical field [0001] The invention relates to a soft clay thermal consolidation experimental model device for experiments under vacuum preloading, which belongs to the technical field of soft clay reinforcement measures in geotechnical engineering, and is suitable for vacuum preloading to strengthen soft soil, and is also suitable for thermal consolidation to strengthen soft soil The small-scale soil model experiment is also suitable for the combination of the two to strengthen soft clay. Background technique [0002] At present, the vacuum preloading technology is to form a negative pressure through a vacuum device and a sealing system, and then transfer the negative pressure to the deep layer of the foundation with the help of vertical drainage bodies, such as sand wells, plastic drainage boards, plastic hoses, etc. (collectively referred to as shafts), to form shafts 1. The pressure difference between the soil and the outside world makes the pore fluid in the soil gathe...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a soft clay thermal consolidation experimental model device, which can solve the problems of air leakage under vacuum preloading, vacuum degree reduction, and uneven heating of the soil around the manhole during thermal consolidation.

[0007] The soft clay thermal consolidation experimental model device provided by the present invention can effectively solve the problem of air leakage and uneven heating of the soil during the vacuum preloading process of the soil, so that the technology of thermal consolidation can be better developed.

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