Silt-subgrade sluice foundation construction method

Abstract

The invention discloses a silt-subgrade sluice foundation construction method. The silt-subgrade sluice foundation construction method comprises the steps that sand piles are adopted to replace silt around a pile position where a stirring pile is about to be placed; and cement added with water glass is adopted as a curing agent, stirred with the silt and hardened to form a cement stirring pile. Onthe basis of low construction cost, the pile forming quality is effectively guaranteed, operation is convenient, and construction is convenient.

Description

technical field [0001] The invention relates to the construction technology of a sluice, in particular to a construction method for a sluice foundation on a silt foundation. Background technique [0002] Silt geology is a relatively common geological condition in coastal areas. The common methods used for the treatment of sluice foundations located on silt foundations include bored piles, prefabricated concrete pipe piles, CFG piles, and cement mixing pile composite foundations. In terms of cost, bored piles are the most expensive, followed by prefabricated concrete pipe piles and CFG piles, and cement mixing piles are the lowest; due to low price, simple construction equipment, convenient operation process, no noise and pollution, cement mixing piles are usually the first choice is recommended. [0003] When the organic matter content such as shell debris and humus debris in the sludge is more than 3%, and there is underground confined water, the pile quality of the cement...

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Problems solved by technology

[0004] (1) The cement mixing pile uses cement as the curing agent. After the soft foundation soil is deeply stirred with a special machine, the cement hydrate and gel formed by the cement hydration and hydrolysis reaction will condense the soil particles into a certain Cement-soil with cohesion and friction angle, but organic matter makes this reinforcement effect greatly weakened, which will hinder the hydration reaction of cement, affect the strength growth of cement-soil, and thus affect the quality of piles

[0005] (2) When there is pressurized water underground, the cement slurry of the mixing pile is easily diluted when it encounters water, and the loss is serious without restraint

Although the ordinary cement slurry has good injectability, a larger grouting volume and grouting reinforcement range can be obtained during grouting, which can effectively improve the bearing capacity of the formation; but the ordinary cement slurry has poor dispersion resistance and is easily diluted by groundwater. Affect its strength and water blocking performance, and its shrinkage rate is large

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