Ground treatment method of automatic frequency conversion vacuum preloading combined with electroosmosis

Abstract

The invention discloses a foundation treatment method of full-automatic variable-frequency vacuum prepressing combined electroosmosis. The foundation treatment method comprises the following steps of(1) establishing a standard model, and determining the optimal drainage speed and the minimum electroosmosis voltage according to the standard model; (2) setting N-grade vacuum degrees, wherein the N-grade vacuum degrees are increased step by step at arithmetic progression; determining the maximum electroosmosis voltage, and setting M-grade electroosmosis voltage values, wherein the M-grade electroosmosis voltage values are increased step by step at arithmetic progression; and (3) applying the N-grade vacuum degrees step by step, applying the M-grade electroosmosis voltage values step by stepuntil the electroosmosis voltage reaches the maximum if the drainage speed is less than the optimal drainage speed, and then applying the next grade of vacuum degree, wherein when the vacuum degree reaches the maximum, the foundation treatment is completed. According to the foundation treatment method, the vacuum degrees and the electroosmosis voltage values are applied step by step, so that the phenomenon that a drainage board is clogged is effectively reduced, the continuous drainage time is extended, and additionally, the foundation consolidation time is shortened.

Description

technical field [0001] The invention relates to the technical field of ultra-high viscosity foundation reinforcement. More specifically, the present invention relates to a ground treatment method of fully automatic variable frequency vacuum preloading combined with electroosmosis. Background technique [0002] Since the Swedish scientist Kjellamn proposed the method of vacuum preloading for drainage and consolidation of soft ground in 1952, engineers all over the world have begun to design different methods and applications for different geological characteristics. The traditional vacuum preloading technology is to first drive plastic drainage boards into the foundation; then, lay sand cushions and drainage pipes on soft soil; and then seal them with sealing film. The vacuum device is used to discharge the water and air under the sealing film to achieve the effect of reinforcement. After the 1980s, my country improved the process and design method of vacuum preloading. Sin...

AI Technical Summary

Problems solved by technology

However, emerging vacuum treatment processes such as vacuum preloading combined with pushing and electroosmosis are prone to clogging of the drainage board when the soil is ultra-high viscosity, ultra-low strength, extremely high moisture content, and has almost no bearing capacity, resulting in drainage The flow rate of the slab decreases, which prolongs the foundation consolidation time, delays the construction period, and limits the use of vacuum preloading foundation treatment

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