Vibratory pile driving method and positioning tool for steel pipe group piles

Abstract

The invention discloses a vibration piling method and positioning tool for steel pipe group piles, comprising the following steps: S1: ground survey; S2: according to the number of steel pipe group piles, the circumference of a single steel pipe pile of the steel pipe group pile, the steel pipe group pile Calculate the frictional resistance of the foundation based on the depth of penetration into the soil and the dynamic frictional resistance per unit area of ​​the foundation, select the vibratory hammer type according to the frictional resistance of the foundation, determine the vibratory force and the number of vibratory hammers of a single vibratory hammer, and ensure: the vibratory force of a single vibratory hammer× The number of vibrating hammers > frictional resistance, several vibrating hammers are used to form a vibrating system through synchronizers; S3: The steel pipe group piles are positioned through the positioning column and the guide pipe is inserted to ensure that the pile tips of the steel pipe group piles are aligned with the designed pile position, and the middle part of the tooling is connected Connect with vibration system; S4: Piling to design elevation. In this scheme, multiple vibratory hammers are used to form a vibration system through a synchronizer, and piles are driven on the steel pipe pile group at the same time, so as to avoid affecting the adjacent or nearby steel pipe piles that have been constructed, the cycle is short, and the machinery 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 pile groups 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 in the whole process, resulting in high construction costs

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