Construction method applied to deviation rectification of sea silt soil square pile groups

Abstract

The invention relates to the technical field of deflection correction for foundations of buildings or structures, in particular to a deflection correction method applied to deflected square pile groups in coastal and neritic muddy soils. The method includes the following steps: step 1, searching for the skewed pile group, layered grouting on the inclined side of the skewed pile group, and solidifying sea silt; step 2, drilling drainage sand wells on the inclined opposite side of the skewed pile group; step 3, placing The side of the grouting solidification area away from the deflected pile group is excavated layer by layer, and the back plate and hydraulic thrust device are installed close to the solidified sea silt; step 4, calculate the hydraulic thrust value Fx to be applied to the back plate, and use the obtained value Start the hydraulic thrust device to apply force to the back plate; step 5, backfill and solidify after the deflected pile group is restored to its position. The method of the invention can prevent the displacement of the soil layer during deviation correction by solidifying the sea silt on the side of the deviation, and realize fast and safe deviation correction. The force applied to the square pile through the back plate and the solidification area can realize the gradual transition of the pile body and passive pressure relief, and enhance the bearing capacity of the pile group.

Description

technical field [0001] The invention relates to the technical field of deflection correction for foundations of buildings or structures, in particular to a deflection correction method applied to deflected square pile groups in coastal and neritic muddy soils. Background technique [0002] In recent years, due to the continuous heating up of real estate, the scale and quantity of building construction have repeatedly hit history. At the same time as building construction, technical personnel have relaxed the quality requirements in various stages of construction such as foundation pile production, survey, design, and construction. There are many pile tilting accidents. Depending on the geology of the construction area, the types of foundation piles used are also different. According to the characteristics of coastal and neritic soft soil foundations, the square pipe pile foundation has been widely used in the foundation engineering of buildings such as coastal roads, bridge...

AI Technical Summary

Problems solved by technology

The above method requires the use of a large excavator, and some small foundation pits have no way to park a large excavator, and even the movement of a large excavator may deflect the pile foundation that was not originally deflected

In addition, there are "Rectification Technology and Reinforcement Measures of Prestressed Pipe Pile in Soft Soil Foundation" (Zhang Jijiang), "Example of Correction and Reinforcement of Prestressed Pipe Pile in Soft Soil Foundation" (Fu Jianzhou), "Prestressed Soil Foundation Pipe pile correction and reinforcement and construction quality control" (Fu Jianzhou) and other papers summarize the correction technology and reinforcement measures in common soft soil foundations. Resetting and rectifying the deviation, without considering the gradual transition force of the pile body and passive pressure relief

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