Construction method of T-shaped pile and T-shaped drilling tool for construction of T-shaped cast pile

Abstract

The invention relates to the field of treatment of building foundations, in particular to a construction method of a T-shaped pile and a T-shaped drilling tool for construction of the T-shaped cast pile. The construction method of the T-shaped pile comprises the steps that a large-torque slewing drilling machine, namely a construction machine, is adopted and is mounted through conventional processes including moving in place, centering and leveling; a large-section pile cap hole is formed through an auger bit; after the large-section pile cap hole is formed, the auger bit is located in the original position and is in a static state, and a drill rod continues to rotate to downwards push a squeezing and expanding drilling tool, so that a pile rod hole for a small-section pile body is formed; the rotary drilling procedure is conducted, a threaded bit is made to protrude towards the outer side of the auger bit, and pile lateral threads are rolled on the pile rod hole for the small-section pile body in a negative angle tangency point direction; and redundant soil of the compaction-thread T-shaped drilling tool and a pile cap is rotatably lifted to the ground. The construction method and the T-shaped drilling tool can improve the bearing capacity of a pile foundation and have the advantages that labor and time are saved, and the efficiency is high.

Description

technical field [0001] The invention relates to the field of building foundation treatment, in particular to a construction method of a T-shaped pile and a T-shaped drilling tool for the construction of the T-shaped cast-in-place pile. Background technique [0002] With the rapid development of the country's industrial and civil construction fields, the requirements for building foundations are getting higher and higher, especially for various types of pile foundations that are widely used. The foundations of buildings such as high-rise buildings, bridges and industrial plants generally adopt conventional bored concrete piles. [0003] CIP and PIP construction methods of pouring reinforced concrete piles are often used in foundation reinforcement, foundation pit retaining wall, reservoir plugging and other projects. But both have flaws. The Chinese invention patent "Application No. 86100705 for Drilling and Grouting Pile Method" (expired) has announced a new method of pour...

AI Technical Summary

Problems solved by technology

The Chinese invention patent "Application No. 86100705 for Drilling and Grouting Pile Method" (expired) has announced a new method of pouring reinforced concrete piles, which overcomes the shortcomings of the gap between the pile body and the soil of the PIP construction method: "Drilling to the desired depth

[0007] However, this method requires too much horsepower and high energy consumption for construction equipment, which is not conducive to the adoption of

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