Pile forming method for submerged orifice impact jet grouting composite pile

A composite pile and pile-forming technology, which is applied in the direction of sheet pile walls, buildings, foundation structure engineering, etc., can solve the problems of weak adaptability of core piles and small ground range, so as to increase the ability to resist horizontal loads, improve seismic performance, The effect of increasing end resistance

Inactive Publication Date: 2017-08-08
BEIJING RONGCHUANG GEOTECHNICAL ENG CO LTD
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Problems solved by technology

[0008] The invention provides a pile-forming method of down-the-hole impact rotary grouting composite piles to solve the problems that the existing composite piles are applicable to a small stratum range and have weak adaptability to core piles

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  • Pile forming method for submerged orifice impact jet grouting composite pile
  • Pile forming method for submerged orifice impact jet grouting composite pile
  • Pile forming method for submerged orifice impact jet grouting composite pile

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Embodiment Construction

[0031] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the present invention will now be described with reference to the accompanying drawings.

[0032] The invention discloses a pile-forming method of a submerged-hole impact rotary-grouting composite pile, which comprises the following steps:

[0033] Step A: first use the down-the-hole impact high-pressure rotary grouting pile construction technology to form the cement-soil outer pile 1; Spraying, that is, horizontal high-pressure spraying above the bottom of the down-the-hole impactor. While drilling, provide high-pressure water (slurry) with a pressure of not less than 15MPa to the injector to cut and soften the soil to ensure the radial aperture during drilling; In addition to the construction of rotary grouting piles in cohesive soil, silt and loose sand, large diameter rotary grouting piles can also be formed in dense sand layers, pebbles, gravels, and m...

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Abstract

The invention provides a pile forming method for a submerged orifice impact jet grouting composite pile. The pile forming method for the submerged orifice impact jet grouting composite pile comprises the following steps that A, a cement soil outer pile is formed by the adoption of a submerged orifice impact high-pressure jet grouting pile construction process; and B, then a core pile is arranged in the cement soil outer pile, and the submerged orifice impact jet grounding composite pile is formed, wherein the core pile is a grouting pile or a cement soil prefabricated pile or a steel pile. The pile forming method is suitable for general stratums such as cohesive soil, floury soil and sandy soil and also suitable for complex stratums such as muddy soil, grait, gravel, boulder, ripraps and artificial land reclamation regions. The submerged orifice impact jet grouting composite pile can be used as a compressive pile or an uplift pile in a pile foundation and also can be used as a strengthened body of a composite ground foundation or a support pile in foundation pit engineering.

Description

[0001] The present invention requires the patent number: 201620969302.4, and the title of the invention is: down-the-hole impact rotary grouting composite pile, the priority of the Chinese patent. technical field [0002] The invention relates to the field of geotechnical engineering, in particular to a method for forming a down-the-hole impact rotary spraying composite pile. Background technique [0003] In the field of geotechnical engineering, according to the purpose, piles can be divided into several categories such as compression piles and uplift piles in foundation engineering, support piles and curtain piles in foundation pit support, and rigid reinforcements in composite foundations; According to the construction technology, it can be divided into two categories: cast-in-place piles and prefabricated piles, among which prefabricated piles include concrete prefabricated piles and steel piles. The two types of piles currently used most in the field of pile foundations...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/34E02D5/46E02D5/48E02D5/50E02D5/56
CPCE02D5/34E02D5/46E02D5/48E02D5/50E02D5/56
Inventor 张亮戴斌马云飞朱允伟刘宏运郭大庆马恩帅
Owner BEIJING RONGCHUANG GEOTECHNICAL ENG CO LTD
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