Building foundation treatment method for region with liquefied soil bearing stratum

Abstract

The invention relates to the technical field of constructional engineering, and discloses a construction foundation treatment method for a region with a liquefied soil bearing stratum, which comprises the following steps: 1) digging an upper foundation pit earthwork; (2) vacuum preloading treatment is conducted on the inner bottom face of the foundation pit, and then quantitative loading is applied; (3) a plurality of foundation piles are constructed downwards on the inner bottom face of the foundation pit, and the pile tops of the foundation piles do not exceed the inner bottom face of the foundation pit; 4) digging out bearing stratum soil bodies among the foundation piles; and (5) a reinforced cushion layer is additionally arranged between the foundation piles. According to the method for treating the building foundation in the area with the liquefied soil bearing layer, when the building foundation in the area with the liquefied soil bearing layer is treated, the liquefied soil layer in the foundation pit is replaced and filled with gravel, then the reinforced cushion layer is additionally arranged, and the foundation is compacted and compacted, so that the compactness change of the foundation is small when the foundation is vibrated, and the liquefaction phenomenon cannot occur, and therefore, the construction efficiency is improved. By the adoption of the scheme, the purpose of improving the construction quality can be achieved.

Description

technical field [0001] The invention relates to the technical field of construction engineering, in particular to a construction foundation treatment method in areas with liquefied soil bearing layers. Background technique [0002] In the alluvial plain of the Yellow River, the liquefaction of the bearing layer of the foundation generally occurs during building construction (the liquefaction of the bearing layer means that the saturated sand and silt particles in the bearing layer tend to become denser under strong vibrations, and the gap between the particles Relative displacement occurs between the particles, and the pore water between the particles is squeezed too late to drain, so the pore water pressure rises sharply. When the pore water pressure rises to be close to the total positive pressure on the soil particles, the friction between the soil particles The shear resistance is close to zero, and the soil at this time is like a liquid), but how to effectively eliminat...

AI Technical Summary

Problems solved by technology

[0002] In the alluvial plain of the Yellow River, the liquefaction of the bearing layer of the foundation generally occurs during building construction (the liquefaction of the bearing layer means that the saturated sand and silt particles in the bearing layer tend to become denser under strong vibrations, and the gap between the particles Relative displacement occurs between the particles, and the pore water between the particles is squeezed too late to drain, so the pore water pressure rises sharply. When the pore water pressure rises to be close to the total positive pressure on the soil particles, the friction between the soil particles The shear resistance is close to zero, and the soil at this time is like a liquid), but how to effectively eliminate the liquefaction of the bearing layer, reduce the construction cost, and reasonably compress the construction period, there is no relatively mature relevant experience at present, so a new method is urgently needed to solve the above problems