Cast-in-situ bored pile hole forming method

A technology of bored piles and cast-in-place piles, which is applied in the direction of drilling equipment and methods, drill pipes, drill pipes, etc., which can solve the problems of large cleaning costs and achieve the effects of reducing pollution and expanding the outer diameter

Active Publication Date: 2020-11-17
江苏省岩土工程勘察设计研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to improve the problem that a large amount of cleaning costs are likely to be caused by the way of mud discharge for hole formation, this application provides a method for hole formation of bored piles

Method used

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  • Cast-in-situ bored pile hole forming method
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  • Cast-in-situ bored pile hole forming method

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Embodiment Construction

[0050] The following is attached Figure 1-5 The application is described in further detail.

[0051] The embodiment of the present application discloses a method for forming holes of bored piles. refer to figure 1 , the hole-forming method comprises the following steps: preparation before construction, burying the casing, drilling, clearing the hole, drilling drainage hole 8, reaming, and the specific implementation method of each step is as follows:

[0052] S1: Preparations before construction, conduct geological and topographic surveys on site, measure and set out lines, and then clean up the working face for hole forming operations, and determine the pile positions. The deviation of pile positions must not exceed the requirements of specifications and designs. Construction engineering drilling rig 1, measuring instrument, casing, hole finder and other equipment and construction materials such as steel cage and concrete enter the site.

[0053] S2: Bury the casing, and ...

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Abstract

The invention relates to the technical field of geotechnical investigation construction, in particular to a cast-in-situ bored pile hole forming method. The cast-in-situ bored pile hole forming methodcomprises the steps of carrying out preparation before construction, carrying out pile casing burying, carrying out drilling, carrying out hole cleaning, carrying out drainage hole drilling, carryingout chambering and the like, and in the chambering step, a pre-drilled pile hole during drilling is gradually squeezed to the designed pile hole diameter through three times of squeezing and chambering. The method has the effects that a small amount of soil is discharged in the hole forming process so that pollution to the construction environment can be reduced, and the construction pollution discharge cost is reduced.

Description

technical field [0001] The present application relates to the field of geotechnical investigation and construction, in particular to a method for forming holes in cast-in-situ bored piles. Background technique [0002] At present, the engineering drilling rig is a drilling rig used for the construction of large-diameter cast-in-situ piles in high-rise buildings, bridge infrastructure and other projects; It is used to drill cores, ore cores, cuttings, gaseous samples and liquid samples, etc., to prove the conditions of underground geology and mineral resources. [0003] The bored concrete cast-in-situ piles of related technologies have been widely used in various industrial and civil construction fields in my country. The hole forming methods can adopt methods such as rotary positive and negative circulation drilling, impact hole forming, rotary drilling and soil extraction. The common feature of these methods is that pile holes need to be dumped during the hole forming proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/04E21B7/28E21B7/02E21B17/22E21B10/44E21B10/26E21B10/32E02D15/04
CPCE02D15/04E21B7/02E21B7/04E21B7/28E21B10/26E21B10/322E21B10/44E21B17/22
Inventor 刘敬锋李全军郑成勇单林锋李凡罡张珺却
Owner 江苏省岩土工程勘察设计研究院
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