Method of quickly solidifying surface layer of blown filled muck soft foundation

Abstract

The invention relates to a method of quickly solidifying a surface layer of a blown filled muck soft foundation. The method comprises the following steps: delimiting a construction area of a certain area, and building safe construction passageways around the construction area; then paving a non-woven fabric, a drain board and a filter pipe, binding the filter pipe and the plastic drain board together, exposing 0.5-0.8 m of the plastic drain board, and then paving geotechnical cloth on the upper part of the filter pipe; arranging a jet pump in every 800-100 m<2> area; paving a plastic film on the upper non-woven fabric as a suffocation film; in a vacuum drainage process, carrying out on-film settlement observation and removing water accumulated on the film immediately; in the middle periodof drainage solidification, using a vibrator properly on the suffocation film to increase the vibrating load, and coating the vibrator with the non-woven fabric as on-film protection during vibration;and when the bearing force of the solidified muck reaches 50 Kpa or meets a designed demand, finishing solidification of the surface layer. According to the method provided by the invention, the construction period can be saved, steps such as a working cushion are saved, waste utilization of the muck is achieved, the solidification speed is high, the effect is good, and line production can be achieved.

Description

technical field [0001] The invention relates to a method for drainage and consolidation of silt soft foundations in port engineering, in particular a method for rapid consolidation of the surface layer of dredged silt soft foundations, which is used to reinforce the floating silt on the surface of newly filled silt, 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 dredging to re...

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