Engineering pile deviation preventing structure of soft soil foundation and pretreatment method

Abstract

The invention relates to an engineering pile deviation preventing structure of a soft soil foundation and a pretreatment method. The engineering pile deviation preventing structure is characterized in that: a reinforcing structure is arranged on the circumference of an engineering pile, the reinforcing structure comprises a plurality of stirring piles which encircle a bearing platform and are continuously arranged in a grid structure, the stirring piles are flush with the engineering pile, the depths of the stirring piles are 1.2 to 1.4 times depth of a foundation pit, and the reinforcing structure is positioned in a 2 / 3 to 3 / 4 foundation pit range using the center of the foundation pit as a center. The pretreatment method of the engineering pile deviation preventing structure comprises the following steps of: digging a pit slag filling layer in original pile sinking, positioning the stirring piles, preparing cement paste, spouting, stirring and sinking, hoisting, repeating the spouting, stirring and sinking step, repeating hoisting till the orifice, closing and cleaning a stirrer, moving to the next pile, and repeating the processes. Compared with the prior art, the engineering pile deviation preventing structure of the soft soil foundation and the pretreatment method provided by the invention have the advantage of effectively preventing the engineering pile from deviating when the foundation pit of the soft soil foundation is dug.

Description

technical field [0001] The invention relates to the construction field, in particular to a structure and a pretreatment method for anti-engineering pile deflection during excavation of foundation pits on soft soil foundations. Background technique [0002] Most existing buildings are equipped with basements for more efficient use of space. During engineering construction, engineering piles are required first, which are piles that are used in engineering and ultimately act under force in buildings and structures. Engineering piles are piles used on engineering entities, which must bear a certain load. Test piles are used for testing and design. If it is a relatively large project, test piles should be made separately. If the project is not important, use the actual pile. You can do it. [0003] The soft soil foundation in coastal areas is generally dominated by silt or silty soil, which has a large liquid index, is in a flow-plastic state, has low shear strength, high compr...

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Problems solved by technology

[0005] 2) Under the action of excess pore water pressure, the soil mass will be displaced; weak and saturated silt and muddy silt have poor water permeability

At the same time, due to the soil squeezing effect during the pile-forming process of prefabricated piles, and with the increasing number of piles, the stress accumulated in the soil is getting larger and larger, and the release of local stress during excavation can easily cause the displacement of piles.

[0007] Due to the high investment cost and long time of foundation treatment in the early stage, it is difficult to fully guarantee the quality of pile deviation during foundation pit excavation, which will bring greater economic and quality losses to subsequent treatment.

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