Small-diameter pile cluster used for pile foundation and construction method of small-diameter pile cluster

Abstract

The invention aims at providing a pile foundation which can obtain large stress area and meanwhile is capable of saving cost, environment-friendly and free of pollution, and a construction method of the pile foundation and relates to a small-diameter pile cluster used for the pile foundation and a construction method of the small-diameter pile cluster. The small-diameter pile cluster is composed of two or more small-diameter piles, pile tops are in contact or engagement, and the diameter of the piles forming the pile cluster is smaller than 800 mm. Soil can be stirred on the peripheries of the piles of the pile cluster in advance, and cement slurry can be injected into soil bodies on the peripheries of the piles for curing; and the piles in the pile cluster can include pile end carriers. The construction method of the small-diameter pile cluster includes the steps that firstly, pile positions are reserved according to design requirements; and secondly, small-diameter pile construction is conducted on the pile positions at the same time or conducted on the pile positions in sequence, cemented soil piles can be formed in the soil bodies on the peripheries of the piles before the small-diameter piles are constructed, the diameter of the cemented soil piles which are finally formed is larger than or equal to the maximum diameter of the pile cluster, and small-diameter pile construction is conducted before the strength of the cemented soil piles meets the requirement for initial setting.

Description

technical field [0001] The application relates to a pile foundation form and a construction method thereof, in particular to a small-diameter pile cluster used for a pile foundation and a construction method thereof. Background technique [0002] In the field of existing pile foundation construction technology, it is usually divided into end-bearing piles and friction piles, which are mainly divided according to the force on the pile end or the force on the pile circumference. Of course, the force of some piles is also between the two types of piles. between. With the development of construction technology, the requirements for the bearing capacity of pile foundations are increasing. When higher requirements are put forward for the bearing capacity of piles, regardless of end-bearing piles or friction piles, they are often increased by increasing the diameter and length of the pile. To increase the bearing area of ​​the pile end and the pile side by means of increasing the ...

AI Technical Summary

Problems solved by technology

However, there are also some problems. Firstly, in order to increase the area of ​​side resistance and end resistance, increasing the pile diameter greatly wastes the compressive strength of the material of the pile foundation itself; The mud retaining wall not only does not use the original soil, but also produces a large amount of muck and mud that needs to be discarded and disposed of, which increases the construction cost and brings environmental pollution during the construction; once again, with the expansion of the pile diameter, the corresponding construction cost is getting higher and higher. High, the technical difficulty of construction is increasing

Images