A construction method for strengthening soft foundation with carbon fiber cement mixing pile combined with electroosmotic method

Abstract

The invention discloses a construction method for soft foundation consolidation by utilizing carbon fiber cement mixing piles combined with the electroosmosis method. The construction method is characterized in that conductive carbon fibers are added into the conventional cement mixing piles, and conductive blocks are arranged at the tops of the piles to form electrodes; and besides, a horizontalsand cushion layer and vertical plastic drainage plates are laid to serve as drainage channels, and a calcium chloride solution or sodium silicate solution is injected into the soil among the piles during different periods of time from the top ends of the plastic drainage plates, so as to shorten the electroosmosis period and improve the strength of the soil among the piles. With the adoption of the construction method for soft foundation consolidation by utilizing carbon fiber cement mixing piles combined with the electroosmosis method, the problems of electrode erosion of the electroosmosismethod and gathering and accumulating of gas bubbles are effectively solved, and the advantages as follows are achieved: the construction time is short, the strength of the foundation after treatmentis high, and the post-construction settlement is little

Description

technical field [0001] The invention relates to a weak soil foundation reinforcement technology, in particular to a construction method for reinforcing soft foundations with carbon fiber cement mixing piles combined with an electroosmotic method, which is mainly applicable to the technical field of soft soil foundation reinforcement engineering in coastal and riverside areas. Background technique [0002] Weak soils such as muddy soils and high-saturation soft clays are widely distributed in coastal and riverside areas. As one of the most commonly used soft foundation reinforcement measures, cement mixing pile composite foundation technology still has some deficiencies; for example, the high moisture content of the soil leads to a longer hardening time of cement soil, which delays the construction progress of the superstructure; as a cement mixing pile composite foundation When applied, the soil between the piles has not been properly treated and cannot function effectively....

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Problems solved by technology

[0004] Purpose of the invention: In order to overcome 1) the low bearing capacity of the soil between conventional cement mixing piles, which cannot effectively exert the coordinated effect of piles and soil; Construction period of superstructure; ③During conventional electroosmosis construction, metal electrodes are easy to corrode and difficult to replace, and the electrical conductivity will decrease after “passivation”; ④During conventional electroosmosis construction, accumulation of cathode air bubbles leads to insufficient soil reinforcement effect and defects, to solve the problems of insufficient bearing capacity of soft soil foundation and large settlement after construction, and propose a construction method of carbon fiber cement mixing pile combined with electroosmotic method to strengthen soft foundation

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