Hard rock stratum drilled pile radial grading hole forming construction method and application

A construction method and technology of bored piles, which are applied in the direction of drilling equipment and methods, drill bits, drilling equipment, etc., and can solve the problems of insufficient footage, large investment of manpower, thick sediment, etc.

Pending Publication Date: 2021-04-27
RAILWAY TENTH GROUP NORTHWEST ENG
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0002] In the construction of impact drilling, mud pool construction and standardized enclosure are required first. The construction of impact drilling requires a lot of manpower. The construction of impact drilling requires large power connection or high-power generators to run power supply all day long. T

Method used

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Embodiment Construction

[0019] Here, the exemplary embodiments will be described in detail, and the "first" or "second" etc. only mean to distinguish the same kind of components or devices, and do not represent limitations.

[0020] The radially graded hole-forming construction method of hard rock formation bored piles in the embodiment of the present invention comprises the steps of:

[0021] a. Construction preparation, equipped with total station, rotary drilling rig, drill bit and casing. The drill bit includes a barrel drill bit and at least two pick sand bucket drill bits with increasing diameters. The diameter of the barrel drill bit is smaller than the pick pick sand bucket drill bit diameter. ;

[0022] b. To measure and stake out, use a total station to locate the center of the pile and mark it;

[0023] c. Bury the casing and align the center of the casing with the center of the pile;

[0024] e. The barrel drill bit is drilled into the hole, and the rotary drilling rig is equipped with ...

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Abstract

The invention relates to the technical field of rock stratum drilling, and provides a hard rock stratum drilled pile radial grading hole forming construction method and application. According to the hard rock stratum drilled pile radial grading hole forming construction method, when pile diameter pile foundation construction is carried out through a rotary drilling rig, firstly, a barrel drill bit is arranged for drilling construction, after drilling is carried out to the designed depth, cutting tooth bailing hopper drill bits with the gradually-increased diameters are sequentially replaced for hole expanding drilling till a hole is formed, and the hole forming efficiency of large-pile diameter and larger-pile diameter hard rock stratum is improved. According to the hard rock stratum drilled pile radial grading hole forming construction method, the rock entering capacity of the rotary drilling rig is improved, and the hole forming speed of the hard rock stratum is increased.

Description

technical field [0001] The invention relates to the technical field of drilling in rock formations, in particular to a construction method and application for radially graded drilling of bored piles in hard rock formations. Background technique [0002] In the construction of impact drilling, mud pool construction and standardized enclosure are required first. The construction of impact drilling requires a lot of manpower. The construction of impact drilling requires large power connection or high-power generators to run power supply all day long. The requirements for power configuration measures are relatively high. High consumption, poor verticality and thick sediment in the process of percussion drilling, the percussion drilling speed is extremely slow in rock formations with relatively hard geology, and even the phenomenon of no footage throughout the day occurs. Contents of the invention [0003] Embodiments of the present invention provide a construction method and a...

Claims

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Application Information

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IPC IPC(8): E21B7/00E21B7/20E21B7/28E21B10/26E21B27/00
CPCE21B7/00E21B7/20E21B7/28E21B10/26E21B27/00
Inventor 王雄雄满孝锋金生涛郝轲刘坤禄
Owner RAILWAY TENTH GROUP NORTHWEST ENG
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