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Hole pile hole-forming construction method and device suitable for high backfill karst geology

A construction method and hole pile technology, which are applied to drilling equipment and methods, sheet pile walls, earthwork drilling and mining, etc., can solve the problems of high construction cost, low construction efficiency and high risk factor of full-circle and full-shroud, and achieve large Cost and construction period advantages, material cost saving, safe and reliable construction effect

Pending Publication Date: 2019-11-08
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AI Technical Summary

Problems solved by technology

Traditional manual excavation has low construction efficiency and high risk factor; ordinary rotary drilling construction is prone to hole collapse and drill sticking under complex geological conditions with high backfill; and the construction cost of full rotary full casing is too high
The above three pore-forming methods all have certain limitations. Therefore, it is necessary to find a pore-forming method that is applicable to various geological conditions and has fast construction, quality assurance, safety, reliability, and low cost.

Method used

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  • Hole pile hole-forming construction method and device suitable for high backfill karst geology

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Embodiment Construction

[0017] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.

[0018] In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral Ground connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

[0019] The device used in the present invention is as figure 1 As shown, it includes a DTR steel casing 1 and a casing boot 7. The up...

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Abstract

The invention discloses a hole pile hole-forming construction method and device suitable for high backfill karst geology. Hole formation with hole pile depth h being less than or equal to 10 m adoptssmall protective cylinder and rotary excavating machine combined construction; hole formation with hole pile depth h being more than 10 m and less than or equal to 16 m adopts big and small protectivecylinder and rotary excavating machine combined construction; and hole formation with hole pile depth h being more than 21 m and less than or equal to 50 m adopts DTR full abrasion drill, big protective cylinder and rotary excavating machine combined construction. The problems of hole collapse and drill clamping are effectively solved, and one-time formation of the hole pile is realized. Meanwhile, by a fully mechanized construction and rotary excavating machine unearthed way, the construction progress of the hole pile is accelerated greatly.

Description

technical field [0001] The invention relates to a hole-forming construction method and device for hole piles suitable for high-backfill karst geology, and belongs to the technical field of building construction. Background technique [0002] Foundation engineering is an important part of construction engineering, and the quality of foundation engineering is directly related to the structural safety of the entire building. The cast-in-place pile foundation is one of the main foundation forms, how to carry out hole-forming construction operations efficiently and economically has become an important topic of great concern to the construction industry. Traditional manual excavation has low construction efficiency and high risk factor; ordinary rotary drilling construction is prone to hole collapse and drill sticking under complex geological conditions with high backfill; and the construction cost of full rotary full casing is too high. The above three pore-forming methods all h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/20E21B10/43E21B17/00E21B17/08E02D5/66
CPCE21B7/20E21B10/43E21B17/00E21B17/08E02D5/66
Inventor 刘英龙翔刘子轩任江绘龙胜花
Owner CCFED THE FIGTH CONSTR & ENG
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