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Foundation excavation retaining and protecting cast-in-situ bored pile construction method and equipment thereof

A technology for bored piles and foundation pit support, which is applied to foundation structure engineering, sheet pile walls, buildings, etc., can solve problems such as high construction cost, low construction efficiency, and difficulty in forming holes, and achieve green and environmentally friendly construction. The hole speed is accelerated, the effect of preventing hole collapse and hole diameter shrinkage

Inactive Publication Date: 2015-08-12
SHENZHEN GONGKAN GEOTECHN GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a construction method of bored piles for foundation pit support, aiming at solving the problem of difficulty in forming holes and low construction efficiency in the construction process of bored piles for foundation pit support in the prior art. and high construction costs

Method used

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  • Foundation excavation retaining and protecting cast-in-situ bored pile construction method and equipment thereof
  • Foundation excavation retaining and protecting cast-in-situ bored pile construction method and equipment thereof
  • Foundation excavation retaining and protecting cast-in-situ bored pile construction method and equipment thereof

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] The implementation of the present invention will be described in detail below in conjunction with specific embodiments.

[0029] Such as Figure 3-8 Shown is the preferred embodiment provided by the present invention.

[0030] The foundation pit support bored pile construction method provided in this embodiment is used to form support piles around the foundation pit, which includes the following construction steps:

[0031] 1), refer to image 3 As shown, the pile position is positioned at the construction site, and the rotary drilling tool 103 is used to pre-pilot the hole;

[0032] 2),...

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Abstract

The invention relates to the technical field of foundation excavation retaining and protecting cast-in-situ bored piles and discloses a foundation excavation retaining and protecting cast-in-situ bored pile construction method and equipment thereof. The method comprises the following steps: 1, adopting a rotary excavating drilling tool to guide a hole in advance; 2, adopting a vibratory hammer to convey a pile casing into the soil layer downward from a hole opening ; 3, adopting the rotary excavating drilling tool to drill to the elevation position at the bottom of the pile casing; 4, adopting an air compressor to supply air into the hole till the air comes out of an opening at the upper end of the hole, and then utilizing a down-the-hole hammer to drill on a bed rock layer; 5, after the down-the-hole hammer drills to a final hole, pulling out the down-the-hole hammer, and infusing slurry into the hole; 6, cleaning the interior of the hole, placing a steel reinforcement cage into the hole, and pouring concrete into the hole; 7, utilizing the vibratory hammer to pull out the pile casing. According to the construction method, a pile casing retaining wall is utilized, and the hole collapse and hole shrinkage can be prevented; the down-the-hole hammer is utilized for cooperating with the air compressor to supply the air, great rock breaking capability is achieved, a rotary drilling machine is adopted for cleaning the hole, the hole formation is made to be greatly accelerated, the construction progress is sped up, and the cost is saved.

Description

technical field [0001] The invention relates to the technical field of bored piles for foundation pit support, in particular to a construction method and equipment for foundation pit support bored piles. Background technique [0002] With the needs of urban development, a large number of new high-rise and super high-rise buildings need to excavate deep foundation pits on the proposed site and effectively support the side walls of the foundation pits. The foundation pit support generally adopts the method of bored piles, and a circle of support piles is formed around the foundation pit. Therefore, when the bedrock of the proposed site is buried deep, and the depth of the foundation pit supporting piles is large, problems such as difficulty in forming holes in the bedrock and inclined holes often occur. [0003] In the existing foundation pit support pile hole forming technology, when constructing the support pile in the bedrock layer 300, the punching drilling process or the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/38E02D13/08E02D11/00
Inventor 尚增弟雷斌李红波左文荣王晶叶坤宋明智骆以道
Owner SHENZHEN GONGKAN GEOTECHN GRP
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