Reinforcing method of vacuum preloading lead pipe pile gas injection carbonized super-soft foundation

Abstract

The invention discloses a reinforcing method of a vacuum preloading lead pipe pile gas injection carbonized super-soft foundation, and belongs to the technical field of super-soft foundation reinforcing treatment of geotechnical engineering. The reinforcing method comprises the steps of site treatment and exploration, first pile group construction and beating, spraying mixing equipment placement and debugging, curing agent spraying and mixing, first treatment system layout, vacuum preloading-gas injection carbonized treatment, first site treatment completing, continuous construction, final treatment and the like. The reinforcing method has the advantageous of a vacuum preloading method, a magnesium oxide carbonization curing method and a pipe pile composite foundation, the drainage efficiency and the infiltration diffusion efficiency of carbon dioxide are greatly improved through coordination work of vacuum preloading and pipe pile gas injection, the compacting displacement action of apipe pile on soft soil is fully utilized, mud soil is effectively glued through hydration products and carbonization products, thus the intensity of the soft soil composite foundation is enhanced, and the stability is improved. The reinforcing method has the characteristics that the treatment effect is good, the period is short, and low-carbon and environmentally-friendly and economic efficiencyare achieved, and resource utilization of industrial waste in soft foundation treatment is achieved.

Description

[0001] Field [0002] The invention belongs to the technical field of reinforcement treatment of silt soft soil in environmental geotechnical engineering, and in particular relates to a reinforcement method for vacuum precompressed duct pile gas injection carbonization supersoft foundation. Background technique [0003] With the rapid development of civil engineering construction in our country, a large amount of silt, silty soil or dredging fill is often encountered in the construction of airport terminals, railways and highways, and civil buildings, especially in coastal areas along the river. These silt soft soils have water content. High rate, high permeability, large liquid-plastic limit, and low shear strength cannot meet the direct needs of the project. It is often necessary to carry out drainage and solidification treatment on these soft soil foundations to reduce the groundwater level and uneven settlement and improve the strength of the foundation. Traditional silt ...

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Problems solved by technology

[0007] In view of the deficiencies in the above-mentioned background technology, the present invention aims to propose a method for strengthening supersoft foundations by vacuum preloading and gas injection carbonization of duct piles, so as to solve the problems of long treatment period, low bearing strength, high economic cost, and problems of supersoft foundations in the prior art. Technical problems of poor environmental benefits, uneven carbonation of ventilation and poor stability

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