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Cast-in-place pile hole-forming construction process in strong karst development area

A construction technique and cast-in-situ pile technology, which is applied in the direction of sheet pile walls, foundation structure engineering, drilling equipment and methods, etc., can solve problems such as easy deflection of karst caves and restrict construction period, and achieve the goal of saving concrete costs and improving construction efficiency Effect

Pending Publication Date: 2022-02-18
广州铁路投资建设集团有限公司 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, during the drilling process of the drilling rig, the drill bit is easily deflected when encountering a karst cave, which seriously restricts the construction period

Method used

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  • Cast-in-place pile hole-forming construction process in strong karst development area
  • Cast-in-place pile hole-forming construction process in strong karst development area
  • Cast-in-place pile hole-forming construction process in strong karst development area

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Embodiment Construction

[0026] The present invention will be further described in detail below with reference to the accompanying drawings. The similar elements in different embodiments use the associated similar element reference. In the following embodiments, many detail descriptions are for better understanding of this application. However, those skilled in the art can recognize that some features may be omitted in different cases, or may be replaced by other elements, materials, and methods. In some cases, some operations related to this application are not shown or described in the specification, which is to avoid excessive descriptions of the core part of the present application, and those skilled in the art, detailed description The relevant operation is not necessary, and they can completely understand the relevant operations in accordance with the description in the specification and the general technical knowledge in the art.

[0027] In addition, the characteristics, operations, or features de...

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Abstract

The invention discloses a hole-forming construction process for a cast-in-place pile in a strong karst development area. The construction process comprises the following steps that a pile casing hole is excavated according to the pile position of a cast-in-place pile foundation, and a pile casing is buried in the pile casing hole; a cohesive soil rammer is filled between the pile casing and a hole wall of the pile casing hole; a drill bit is aligned to the center of the pile position, perpendicularity of the drill bit is adjusted, and drilling is conducted in the axial lead direction of the pile casing; slurry is injected into the pile casing, and the height of the slurry is kept higher than the pile casing footing; perpendicularity of the hole wall of the pile hole is measured in the drilling process; and when the hole wall deflects, the drill bit is rectified so as to keep the drill bit in a vertical state. In the drilling construction process, the slurry is injected into the pile casing, and compared with a previous concrete filling mode, the concrete cost can be effectively saved, steps caused by super-square concrete after construction can be saved, and construction efficiency is improved.

Description

Technical field [0001] The present invention relates to the field of infusion pile construction, and in particular, there is a coefficient of macroporous strength development processes. Background technique [0002] In the subway construction project in the limestone area of ​​the karst-developing area, there are more cave development zones, and the bottom is complex, the amount of homogenesis is high. During the construction of the pile, it is often used due to the occurrence of the landslide accident, usually with concrete backfill. Caves, thereby increasing the workload of the concrete in the back of the piles when the post-foundation pit is excavated. Also, during the drilling process, the drill bit encounters a cave that the cave is easily skewed, and the construction period is severely restructured. Inventive content [0003] The main solution of the present invention is to provide a material cost capable of saving concrete, and correcting the drill's drill bit to improve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/00E21B7/28E21B47/022E02D5/38E02D15/04
CPCE21B7/00E21B7/28E21B47/022E02D5/38E02D15/04
Inventor 贺婷李伟亮彭洪秋焦长洲张清涛徐冠玉刘自兵杨雁彬陈钰博尹兴龙
Owner 广州铁路投资建设集团有限公司
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