Device and method for reinforcing soft soil foundation through combination of strong drainage preloading and electroosmosis

Abstract

The invention discloses a device and method for reinforcing a soft soil foundation through combination of strong drainage preloading and electroosmosis, and relates to the technical field of soft soil foundation reinforcing engineering. The device for reinforcing the soft soil foundation through the combination of strong drainage preloading and electroosmosis comprises at least one drainage assembly, the drainage assembly comprises at least one strong drainage plate and an electroosmosis unit, the strong drainage plate is coated with a filter membrane, a drainage channel is formed between the strong drainage plate and the filter membrane, the strong drainage plate is connected with a Venturi tube, and the interior of the Venturi tube is hollow to form a jet flow inner cavity of which the front and back are correspondingly connected with a fluid inlet and a fluid outlet; and the electroosmosis unit comprises an anode and a cathode which are matched for use, the anode is a steel bar inserted into the soft soil foundation, the cathode is an electrode arranged in the drainage channel, and the electrode and the steel bar are matched to enable pore water with positive charges to permeate the filtering membrane and flow into the drainage channel. The soft soil foundation can be reinforced, the consolidation effect of the deep layer part and the shallow layer part is further improved, and the void ratio of the soil body is reduced.

Description

technical field [0001] The invention relates to the technical field of soft soil foundation reinforcement engineering, in particular to a device for strengthening soft soil foundation with strong drainage preloading combined with electroosmosis, and also relates to a method for strengthening soft soil foundation with strong drainage preloading combined with electroosmosis. Background technique [0002] At present, the reinforcement of soft soil foundation usually adopts the method of preloading and drainage consolidation. The preloading and drainage consolidation methods mainly include vacuum preloading and surcharge preloading. During soft foundation reinforcement treatment, hard sand wells or drainage plates are generally installed in the soft foundation as drainage channels, and drainage consolidation occurs under the self-weight load of the piled material or vacuum load preload, so that the pore water in the soft foundation can pass through the drainage. The channel disc...

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Problems solved by technology

The effect of electroosmotic drainage is carried out by using the equivalent preloaded load diagram. figure 1 Although this electro-osmotic drainage method has a better effect on the shallow part of the soft soil foundation, it is difficult to drain the deep part of the depth of more than 6 meters.

[0004] In the prior art, some people combine vacuum preloading or surcharge preloading with electroosmosis to drain soft soil foundation respectively, and the equivalent preloading load diagram of vacuum preloading combined with electroosmosis is added figure 2 , the equivalent preloading load diagram of surcharge preloading combined with electroosmosis participated in image 3 , although these two combined methods can improve the drainage effect of soft soil foundation, they are still not ideal, and the void ratio in the deep part is still relatively large

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