Construction method of water drainage uplift pile

Abstract

The invention discloses a construction method of a water drainage uplift pile which has the water drainage function and the uplift characteristic at the same time. The construction method is characterized by comprising the following steps: excavating a foundation pit, constructing a retaining wall, drilling holes, conducting slip casting and pouring a bearing platform. The construction method is simple, high in operability and obvious in economic benefit. A soil engineering bag is used, therefore, the diameters or the wall thicknesses of an impervious reinforced concrete pile and a pervious plain concrete pile can be effectively controlled, and corrosion and damage of underground water to reinforcing steel bars can be effectively avoided. Meanwhile, compared with other water drainage piles, the water drainage uplift pile has the advantages that the uplift bearing capacity can be provided, the pervious concrete part which can drain water can synchronously provide the functions of the compression bearing capacity and the soil lateral pressure, and the aims of water drainage and the uplift bearing capacity are effectively achieved.

Description

technical field [0001] The invention relates to the technical field of construction pile foundation and soft soil foundation treatment, in particular to a construction method of drainage and uplift piles. Background technique [0002] There is a liquefiable soil layer in the foundation soil layer. Under the action of seismic cyclic load, the saturated sandy soil will change the porosity and cause the increase of the excess static pore water pressure due to the reorganization of the sand particles and the change of the structure. When the groundwater Liquefaction or instability occurs when the force acting on the particle reaches the effective stress. The loss of sand strength caused by liquefaction is an important reason for the damage of buildings during earthquakes. The drainage channels are pre-buried in the building pile foundation, and when the super static pore water pressure rises, the water is discharged, which can effectively avoid the liquefaction of the sand laye...

AI Technical Summary

Problems solved by technology

Once the pull-out bearing capacity characteristics of the pile foundation are considered, it is necessary to consider adding a steel cage in the pile foundation; and as a pervious concrete pile with relatively good water permeability and vertical compressive bearing capacity, if it is directly placed in the permeable concrete pile body With steel cages, groundwater is likely to cause corrosion of the steel cages, thus losing its pull-out bearing capacity characteristics

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