Steel pipe pile group vibration piling method and positioning tool

Abstract

The invention discloses a steel pipe pile group vibration piling method and a positioning tool. The method comprises the following steps that S1, foundation investigation is conducted; S2, the frictional resistance of the foundation is calculated according to the number of the steel pipe group piles, the perimeter of a single steel pipe pile of the steel pipe group piles, the buried depth of the steel pipe group piles and the unit area dynamic frictional resistance of the foundation, vibratory hammer model selection is conducted according to the frictional resistance of the foundation, and the vibration force of a single vibratory hammer and the number of vibratory hammers are determined, it is ensured that the product of the vibration force of a single vibratory hammer and the number of the vibratory hammers is larger than the frictional resistance, and the multiple vibratory hammers form a vibration system through a synchronizer; S3, the steel pipe group piles are positioned by inserting positioning columns into guide pipes, it is ensured that pile tips of the steel pipe group piles are aligned with designed pile positions, and the middle of the connecting tool is connected with the vibration system; and S4, piling is carried out to the designed elevation. According to the scheme, the multiple vibratory hammers form the vibration system through the synchronizer, and pile driving is conducted on the steel pipe group piles at the same time, so that influences on adjacent or nearby constructed steel pipe piles are avoided, the period is short, and machine idling is avoided.

Description

technical field [0001] The invention relates to the field of underground space engineering, in particular to a method for vibrating pile driving of steel pipe group piles and a positioning tool. Background technique [0002] At present, for the rapid construction sites of communication towers in China, the construction technology of steel pipe piles is often used. Steel pipe piles can be completed within 5 days in the shorter processing cycle. Generally, the diameter is 0.4-11.5 meters and the length is 5-12 meters. They can be transported in containers, and their weight is lighter than that of precast concrete. Generally, each pile is 3-8 tons. The following problems exist in the construction of steel pipe group piles in the prior art: (1) During the piling process, it will affect the adjacent or nearby steel pipe piles that have been constructed, and adversely affect their strength and installation orientation. (2) The construction period is long and the efficiency is low...

AI Technical Summary

Problems solved by technology

The following problems exist in the construction of steel pipe group piles in the prior art: (1) During the piling process, it will affect the adjacent or nearby steel pipe piles that have been constructed, and adversely affect their strength and installation orientation

(2) Long construction period and low efficiency

(3) The machine is idle for a long time, and cranes and pile drivers are used intermittently during the whole process, resulting in high construction costs

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