Novel cemented soil composite pile

Abstract

The invention provides a novel cemented soil composite pile which comprises a main pile body, a pile core portion, a sand-gravel cushion and pile-surrounding soil. The pile core portion is arranged atthe middle position in the main pile body. A filling cavity is arranged in the pile core portion. The pile-surrounding soil is evenly arranged on the outer side of the main pile body. Pre-buried water drainage pipes are mounted on the two sides in the pile-surrounding soil. The sand-gravel cushion is arranged at the top of the main pile body. A torsion rib mounting plate is welded to the bottom of the pile core portion. Fixed torsion ribs are welded to the surface of the torsion rib mounting plate. A pile core column is mounted at the tops of the fixed torsion ribs. Steel bars are wound around the surface of the pile core column. A damping layer is arranged on the outer side of the pile core portion. A geotextile bag layer is arranged on the outer side of the damping layer and is filled with geotextile bags. Through a series of structures, the novel cemented soil composite pile has the advantages of being stable in structure, convenient to mount and fix, good in fixing effect and thelike.

Description

technical field [0001] The invention relates to the field of construction engineering, in particular to a novel cement-soil composite pile. Background technique [0002] Composite pile is a new pile type proposed in the geotechnical field in recent years, which solves many problems of the traditional pile type, such as stratum limitations, backward technology, and high engineering cost. The core pile is constructed within a certain period of time after construction to form a composite pile with external flexibility and internal rigidity. The construction methods of cement-soil external piles often use high-pressure rotary spraying, cement mixing or stirring rotary spraying, etc. After the pile is formed, the core pile is inserted into the core pile by sinking, drilling or hammering to form a composite pile, although the type of composite pile There are many types of construction methods, but most of the pile types are affected by the differences in the strata, the setting t...

AI Technical Summary

Problems solved by technology

The construction methods of cement-soil external piles often use high-pressure rotary spraying, cement mixing or stirring rotary spraying, etc. After the pile is formed, the core pile is inserted into the core pile by sinking, drilling or hammering to form a composite pile, although the type of composite pile There are many types of construction methods, but most of the pile types are affected by the difference in strata, the setting time of cement soil, and the core pile pile technology. The construction is difficult, and the construction quality and construction period are not easy to guarantee.

[0003] In the relatively developed eastern coastal areas of our country, silt and silty soft clay with high water content, high compressibility, poor permeability, low strength and high sensitivity are widely distributed, and the strength and performance of the mixing pile are affected by soil quality, Factors such as groundwater have a great influence, especially when encountering silty soil, peat soil, etc., and the construction quality is difficult to control; the precast concrete core pile needs to be aligned with the center of the mixing pile before sinking, and it is difficult to ensure the core in the actual construction process. The pile position is absolutely centered, and it is prone to deflection during the sinking process, and it is difficult to achieve the expected effect of the composite pile in the end; when the core pile is installed in the cement soil, it not only needs to consume a lot of energy, but also the vibration itself has a great impact on the surrounding environment. The impact is also greater, and at the same time, due to the vibration and extrusion, the excess pore water pressure generated in the soil around the pile is not easy to dissipate

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