Steel pipe composite pile for collapsible loess

Abstract

The invention provides a steel pipe composite pile for collapsible loess, and belongs to the technical field of a building pipe pile. The steel pipe composite pile for collapsible loess comprises a steel pipe sleeve, steel insertion plates, a pile point and a concrete pile core, wherein each steel insertion plate comprises a horizontal hollow insertion plate and a vertical arc-shaped insertion plate; a plurality of horizontal hollow insertion plates are uniformly arranged on the outer walls of the vertical arc-shaped insertion plates; a plurality of steel insertion plates are uniformly arranged inside the steel pipe sleeve; a plurality of clamping grooves corresponding to the horizontal hollow insertion plates are uniformly arranged in the peripheral direction of the steel pipe sleeve andare used for being clamped with the horizontal hollow insertion plates; the pile point is arranged at the end part of the steel pipe sleeve; and the concrete pile core is arranged inside the steel pipe sleeve. The steel pipe composite pile for collapsible loess can prevent the water collapsibility of a loess body in the horizontal direction; water in the loess can be adsorbed so as to reduce the loess sedimentation; the pile side negative frictional resistance is further eliminated or reduced; and the bearing capability of the pile foundation is improved.

Description

technical field [0001] The invention relates to the technical field of construction pipe piles, in particular to a steel pipe composite pile used for collapsible loess. Background technique [0002] In recent years, the use of pile foundations has been increasing. Pile foundations have good bearing capacity, but due to collapsible loess soaking in water, collapsible deformation will occur, and pile foundations will have a large negative friction resistance. In severe cases, it will cause buildings to Therefore, how to reduce the negative friction resistance of pile foundation in collapsible loess has important engineering practical significance. [0003] Existing measures to reduce negative frictional resistance are mainly burying isolation piles or protective piles and pile body surface coating method. The pile body surface coating method is to coat a special asphalt on the pile side surface above the neutral point of the pile body. When the relative displacement between t...

AI Technical Summary

Problems solved by technology

However, asphalt will corrode and age when in contact with soil with a large water content for a long time, and eventually fail, making the bearing capacity of the pile foundation insufficient

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