Construction method of ultrasoft foundation raft working cushion layer

Abstract

The invention provides a construction method of an ultrasoft foundation raft working cushion layer, comprising the following steps of: paving a layer of single-sided waterproof woven fabric on an ultrasoft foundation; paving a layer of a trellised bamboo raft with a distance of each square of 40*40cm on the waterproof woven fabric; paving another two layers of bamboo fences on the bamboo raft; finally covering a filament geotextile on the two layers of bamboo fences; then carrying out operation of hydraulically filling sandy soil, wherein the operation of hydraulically filling the sandy soil is divided into twice or a plurality of times of hydraulic filling; hydraulically filling a sandy soil layer to form the working cushion layer, and laying a foundation of piling a plastic sheet pile; lapping when paving the waterproof woven fabric and the filament geotextile; lashing the bamboo raft by 10-model lead wires; paving the bamboo fences on the bamboo raft to be lapped in a staggering way, and lashing the bamboo fences with the bamboo raft to form a whole body; and carrying out the operation of hydraulically filling the sandy soil. The invention has the effects that the working cushion layer completely bears the loading pressure of the sandy soil, thereby ensuring non mud overflow after the plastic sheet pile is piled; the construction period and the cost are saved; and the ultrasoft foundation is treated by once reinforcement treatment and once formation.

Description

technical field [0001] The invention relates to a method for constructing a raft-type working cushion on an ultra-soft foundation, which is used for immediately constructing the working cushion on the mud surface after the harbor basin of Tianjin Lingang Industrial Zone is blown and filled. Background technique [0002] In order to adapt to the rapid development of Tianjin Lingang Industrial Zone, foundation reinforcement treatment must be carried out immediately after mud blowing in some harbor basins, but the foundation soils are all ultra-soft foundations. Traditional construction method: After the silt in the harbor basin has been dried for 1-2 years and the soil has reached a certain hardness, the traditional foundation reinforcement construction process will be carried out, but this will greatly delay the later investment and use time of the harbor basin land. If the method of secondary treatment is adopted, the construction period of manual inserting boards is also in...

AI Technical Summary

Problems solved by technology

Traditional construction method: After the silt in the harbor basin has been dried for 1-2 years and the soil has reached a certain hardness, the traditional foundation reinforcement construction process will be carried out, but this will greatly delay the later investment and use time of the harbor basin land

If the method of secondary treatment is adopted, the construction period of manual inserting boards will also be increased, and it will be a double waste in terms of labor costs and material costs.

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