Surface-layer fast solidification method for soft foundation with dredger soil

Abstract

The invention relates to a surface-layer fast solidification method for a soft foundation with dredger soil. The surface-layer fast solidification method includes steps of delimiting a construction region with the certain area and erecting a safe construction channel on the periphery of the construction region; laying two layers of non-woven fabrics on a soil surface in the construction region; building a shallow-layer water drainage plate; then distributing filter tubes among the non-woven fabrics to be used as water drainage channels and connecting submersible type vacuum pumps onto the filter tubes to realize vacuum water drainage; laying plastic membranes on the tops of the upper-layer non-woven fabrics to be used as air closure membranes; observing settlement on the membranes in a vacuum water drainage process and draining water accumulated on the membranes in time; using vibrators on the air closure membranes in good time to increase vibration load in the middle of a water drainage solidification period, and wrapping non-woven fabrics on the vibrators to realize membrane protection during vibration; and completing surface-layer solidification after bearing capacity of the solidified soil reaches 50Kpa or meets designed requirements. By the aid of the method, a work period can be shortened, work procedures such as work cushioning and the like are omitted, waste recovery of the soil is realized, solidification speed is fast, an effect is good, and assembly line production can be realized.

Description

technical field [0001] The invention relates to a method for drainage and consolidation of silt soft foundations in port engineering, in particular to a rapid surface consolidation method for dredging and filling silt soft foundations, which is used to reinforce the floating silt on the surface of new dredging and filling, and is used as a construction support for deep reinforcement. force layer. Background technique [0002] In port engineering construction, one of the key technologies is silt treatment and silt utilization, which is one of the main factors affecting project quality, construction period and cost. Lianyungang's silt has fine particles, high water content, and poor physical and mechanical indicators. During the construction of the port, the silt must be treated, and the silt must be excavated or drained and consolidated for use as a foundation. Commonly used silt reinforcement technologies and processes are: [0003] Rock replacement: Use mechanical dredgi...

AI Technical Summary

Problems solved by technology

The disadvantages are: a large amount of rock filling is required, resulting in a waste of natural resources; the sludge excavated by machinery and the sludge squeezed out by blasting cause secondary handling and pollution; the sludge resources cannot be fully and effectively used

The disadvantage is: like vacuum preloading, it needs a lot of drying time and auxiliary engineering measures, and the cost is high

The disadvantages are: a large amount of admixture is added, and the cost is high, and it is only used in the key parts of the project; the quality of the project is not easy to guarantee, and this process has been canceled in many areas

The commonly used method in the prior art is: sedimentation and drying for 4 months, after laying woven cloth and bamboo battens, use mountain bark soil as a working cushion, which not only greatly increases the project cost, but also brings great construction risks