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

A technology of cement mixing piles and construction methods, which is applied in foundation structure engineering, sheet pile walls, buildings, etc., and can solve the problems of inability to effectively exert the coordination and interaction between piles and soil, insufficient bearing capacity of weak soil foundations, and influence on the construction period of superstructures, etc. problems, to achieve the effect of shortening the construction period of electroosmosis, improving the strength of the foundation, and facilitating quality control

CN107630450BActive Publication Date: 2019-11-12HOHAI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-11-12

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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
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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....

Examples

Embodiment Construction

[0037]The invention proposes constructing the cement mixing pile containing carbon fiber in the soft ground, and arranging conductive blocks on the top of the cement mixing pile containing carbon fiber to form an electrode. Lay a sand cushion layer on the surface and arrange plastic drainage boards between adjacent cathodes and anodes, and inject calcium chloride solution or sodium silicate solution with a design concentration into the soil from the top of the plastic drainage board in time intervals. When the direct current is connected, the ions in the soil produce electroosmosis and chemical reaction, the water is discharged by the plastic drainage board, and the air bubbles gather near the conductive block, which can be manually removed. When the drainage rate obviously slows down or tends to zero, reverse the electrode and connect the direct current; when the electroosmosis reinforcement effect reaches the expected effect or changes little, stop the electroosmosis to compl...