Soil cement expanding uplift pile

Abstract

The invention relates to a soil cement expanding uplift pile taking anti-floating restraint for underground buildings and structures or a pile foundation for resisting the inclination of the underground buildings. The underground buildings and structures of an area with a higher underground water level all have structural anti-floating problems, so the uplift pile is necessary to be adopted to restrain the buoyancy of underground water for the underground buildings; in order to prevent the inclination of the underground buildings, inclined pulling force generated by the uplift pile foundation needs to be adopted to restrain the inclination, so the uplift pile includes a vertical uplift pile generating vertical pulling force and an inclined uplift pile generating inclined pulling force; and in order to increase the uplift force of the uplift pile inside a soft soil layer, the diameter, the pile body roughness and the expanding diameter of the uplift pile are increased. The soil cement expanding uplift pile comprises a soil cement material with changeable diameter, a set cement material, an anchorage body, an anchorage plate, an end-part locking pipe, a PVC sleeve, an anchorage device, and the like and adopts an intermediate and high pressure jet grouting and anchorage drag-in one-step molding method and a stirring jet grouting and anchorage drag-in one-step molding method.

Description

1. Technical field: [0001] The invention relates to the field of geotechnical engineering, in particular to a pile foundation used for anti-floating constraints on underground buildings and structures or anti-slope of ground buildings. 2. Background technology: [0002] In areas with high groundwater levels, underground buildings and structures have structural anti-floating problems, and uplift piles must be used to restrain the buoyancy of groundwater on buildings; in addition, in order to prevent buildings from tilting, uplift piles must be used Oblique pull to restrain. Therefore, the uplift piles include vertical uplift piles that generate vertical tension and oblique uplift piles that generate oblique tension. Currently commonly used uplift piles are: bored reinforced concrete piles, static pressure pipe piles (PHC piles), static pressure square piles, anchor piles, and bottom expansion piles. Through the frictional resistance generated by the relative movement betwee...

AI Technical Summary

Problems solved by technology

In the weak soil layer, due to the small friction resistance between the uplift pile body and the foundation soil, especially the smooth surface of the static pressure prefabricated pile, the generated friction resistance is even greater. To obtain a larger pullout force, only Increase the length and diameter of piles, which will lead to higher cost of uplift piles and longer construction period

Although the use of bored piles can obtain higher pullout resistance, but the cost, quality and construction period of the construction are relatively long

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