High-efficiency curing method for soft soil site with high moisture content

Abstract

The invention belongs to the technical field of environment rock-soil engineering and discloses a high-efficiency curing method for a soft soil site with high moisture content. The high-efficiency curing method comprises an in situ chemical curing step and a preloading drainage step; the in situ chemical curing step comprises investigating sites, determining physical and chemical indexes such as depth, area, moisture content, organic matter content, liquid plastic limit and salt content of the soft soil site; blending a curing agent, determining the types, adding ratio, and initial and final setting time of the curing agent based on the physical and chemical indexes; blocking the site, and building partition walls for site blocking in the soft soil site; carrying out chemical curing construction, and uniformly mixing the blended curing agent with to-be-cured soft soil; carrying out preloading drainage construction according to three construction modes of vacuum preloading or surchargepreloading or vacuum surcharge preloading; unloading and repairing the site; after preloading time reaches 28 days, swabbing off drained water from the upper surface layer of curing blocks, unloadingand injecting cement slurry into a drain board for secondary repair and reinforcement by adopting a high-pressure grouting pump.

Description

technical field [0001] The invention relates to the technical field of environmental geotechnical engineering, in particular to an efficient curing method for soft soil sites with high water content. Background technique [0002] Soft soil sites with high water content such as natural water tidal flats, silt dumps, and sludge landfill pits in my country are widely distributed, and dredged silt and domestic sludge have high water content, large liquid-plastic limit, low permeability, and strong fluidity. It is difficult to achieve the purpose of reinforcement by using general surcharge preloading or vacuum preloading methods, and the drainage period is long and the cost is high. For such soft soil sites, in-situ chemical solidification is also considered in engineering. That is, through grouting or powder spraying mixing equipment, cement, fly ash and other curing agents are fully mixed with mud, and chemical reactions occur, so as to achieve the purpose of precipitation and ...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a high-efficiency solidification method for high-moisture-content soft soil sites, which solves the technical problems of high-moisture-content soft soil solidification disposal cost, long cycle, unsatisfactory effect and poor reliability in the prior art

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