Method for processing soft foundation by combining electrochemical grouting with slurry-cemented discrete material pile

Abstract

The invention provides a method for processing a soft foundation by combining electrochemical grouting with a slurry-cemented discrete material pile. The method provided by the invention comprises the following steps of: forming a pile hole by drilling and protecting a wall with slurry; adding discrete materials; crossly arranging electric geosynthetics electrodes in foundation soil as a cathode and placing a grouting pipe in the pile hole as an anode; grouting cement slurry into the discrete materials through the grouting pipe; switching on a power supply on a soil-between-piles electrode and a grouting pipe electrode; carrying out electrochemical grouting on a soil body around the pile by utilizing an electric field acting force, wherein the cement slurry permeates into the soil body around the pile from the pile hole under the effects of an electric osmosis force; meanwhile, solidifying drained water of the soil between the piles by the electric osmosis; condensing the slurry to form the slurry-cemented discrete material pile and enhancing the strength of the soil between the piles at the same time; and paving cushion layers on a pile top and the top face of the soil between the piles to form a composite foundation. The method provided by the invention is simple in construction process, strong in maneuverability, convenient for quality control, obvious in economic benefits and obvious in effects of managing a soft soil foundation; and construction machines are shorter, so that the method can be widely applied to road sections including a space-limited high-voltage transmission line, a bridge interchange and the like.

Description

technical field [0001] The invention relates to the technical field of soft soil foundation treatment, in particular to a method for treating soft foundations with electrochemical grouting combined with grouted solid-dispersed material piles. It is mainly suitable for engineering technical fields such as soft soil foundation treatment of coastal and riverside highways. [0002] Background technique [0003] The pile-soil coordinated action to share the upper load is the essential feature of the pile-based composite foundation for soft soil foundation. The treatment of foundation soil includes two categories: pile displacement enhancement and soil consolidation compression enhancement. Prior to the present invention, the Chinese patent "A Pile Composite Foundation Construction Method of Pile-Soil Interaction Slurry Solid Dispersion Material" (ZL200510038903.X) disclosed a method of drilling holes and mud walls with drilling rigs, and injecting cement slurry and slurry into ...

AI Technical Summary

Problems solved by technology

Although this method improves the drainage and consolidation rate of the soil between the piles, the chemical reaction sediment also has a certain cementation effect on the pile and soil; however, ...

Images