Method for reinforcing soft soil foundation by taking industrial solid waste as main raw material

Abstract

The invention discloses a method for reinforcing a soft soil foundation by taking industrial solid waste as a main raw material. The raw material of a soft soil curing agent comprises the following components according to mass percent: 35.0% to 42.0% of carbonated steel slag, 22.0% to 27.0% of slag powder, 6.0% to 10.0% of fly ash, 24.0% to 35.0% of cement and 2.0% to 5.0% of lime, gypsum or a mixture of lime and gypsum in any proportion. When the sum of the mass of soft soil, the mass of water and the mass of the soft soil curing agent is 100%, the mixing ratio of the soft soil curing agent is 12.0% to 20.0%; and according to the method, water is added according to the water cement ratio of 0.45 to 0.55, the mixture is stirred so as to prepare soft soil curing agent slurry, and the soft soil curing agent slurry is injected into the soft soil foundation. According to the method, the carbonated steel slag, the slag powder and the fly ash are used for replacing a cement curing agent, so that the problem of low utilization rate of industrial solid waste is solved, the reinforcing cost of a mixing pile of the soft soil foundation is greatly reduced, the treatment problem of the soft soil foundation in urban development and construction is also solved, and the requirements of technical regulations of a reinforcing method of the mixing pile of the soft soil foundation (YBJ225-91) are met.

Description

technical field [0001] The invention relates to a soft soil foundation reinforcement method using industrial solid waste as the main raw material, and belongs to the technical field of soft soil foundation reinforcement. Background technique [0002] my country is a big steel producing country, which produces a large amount of steel slag every year. For a long time, the utilization rate of steel slag in my country has been low, but the amount of slag discharged is still increasing by tens of millions of tons every year, and a large amount of steel slag is piled up into slag mountains, occupying a lot of land. A large amount of steel slag is discarded and piled up, and it is difficult to make full use of it. The important reason is that its composition contains a large amount of free oxides (f-CaO, f-MgO), and these free oxides are easy to react with water or steam to produce volume expansion (f-CaO , f-MgO reaction expansion ratios are 98% and 148%, respectively), which mak...

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Problems solved by technology

[0006] The purpose of the present invention is to aim at the above-mentioned defects existing in the prior art, and provide a kind of method that uses industrial solid waste as the main raw material to strengthen the soft ground, to solve the problem that a large amount of cement is used in the treatment of the existing soft ground, which cannot meet social needs and Difficult to process waste from steel mills

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