Long spiral drilling and percussion drilling dual-machine composite pore-forming grouting pile construction method

A technology of percussion drilling rig and long screw, applied in sheet pile wall, foundation structure engineering, construction, etc., can solve the problems of shallow rock penetration, slow hole forming speed, and easy blocking of pipes when pouring concrete.

Active Publication Date: 2017-09-05
荣泰建设集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It not only solves a series of problems such as the small diameter of the hole drilled by the auger drill, the shallow depth of the rock, and the easy plugging of the pouring concrete, but also solves the problems of the hole wall collapse and the slow hole formation speed during the drilling process.

Method used

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  • Long spiral drilling and percussion drilling dual-machine composite pore-forming grouting pile construction method
  • Long spiral drilling and percussion drilling dual-machine composite pore-forming grouting pile construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] The construction method of long auger drill and percussion drill dual-machine composite hole-forming cast-in-place pile provided in this embodiment includes the following steps:

[0085] (1) Construction preparation

[0086] (1) Staffing: Management personnel have clear responsibilities, workers with one specialty and multiple abilities, and special projects must hold certificates to work.

[0087] (2) According to the requirements of geological conditions and construction drawings for the depth of rock entry, and considering the mechanical efficiency, calculate the combination ratio of rotation and impact. According to calculations, the combination of one-rotation and four-flushing in this project is the best, with a total of 2 long auger drilling rigs and 8 percussion drilling rigs.

[0088] (3) See Table 2 for staffing:

[0089] Table 2 Construction staff configuration table

[0090]

[0091] (4) Technical preparation

[0092] 1) Joint review of drawings

[0...

Embodiment 2

[0148] Embodiment 2 construction method application situation and popularization and application prospect:

[0149] (1) This construction method is applied to Qingdao Iron and Steel Co., Ltd.'s urban steel plant environmental protection relocation coking area reserve coal tank project. This project is located in Dongjiakou Industrial Zone, Boli Town, Huangdao District. The total engineering volume of the pile foundation is 11580m3, and the subcontracted engineering volume 57903, the contract price is 6.7 million yuan. The design service life of this project is 50 years, the seismic fortification intensity of this project is 7 degrees, and the seismic fortification is Class C. The foundation of the project is located on the mudflat, and the upper part is backfilled with gravel. The construction is difficult and the construction period is tight. The load of the pile foundation is large, and the rock penetration is required to be deep, so a large pile foundation is required.

[...

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Abstract

The invention discloses a long spiral drilling and percussion drilling dual-machine composite pore-forming grouting pile construction method. The method comprises the following steps of (1) construction preparation, (2) long spiral drilling primary pore forming, (3) percussion drilling machine secondary chambering and rock entering, (4) the from-inside-to-outside one-spiral multi-percussion dual-machine joint construction technology, and (5) reinforcement cage placement and concrete pouring. According to the method, under the condition of guaranteeing the pore-forming quality, the pore-forming efficiency and rock-entering depth are greatly improved through the construction technology, and the construction efficiency is greatly improved; spiral and percussion composite construction is achieved, the noise and vibration duration is short, and the phenomena of pile breaking, virtual piles, necking down, hole collapse and repeated construction are avoided; and several devices carry out construction at the same time, the foundation treatment speed is increased, a user can use a foundation in advance, and social and environment protection benefits are remarkable.

Description

technical field [0001] The invention relates to a construction method of a long auger drill and a percussion drill dual-machine composite hole-forming cast-in-situ pile, belonging to the technical field of building construction. Background technique [0002] Bored pile refers to the pile foundation formed by forming a pile hole in the foundation soil by means of mechanical drilling, punching, steel pipe extrusion or manual excavation on the project site, and placing a steel cage in it and pouring concrete. Bored piles are widely used in engineering projects with poor geological conditions due to their mature construction technology, high bearing capacity, and few restrictions on use. [0003] However, from the perspective of the traditional construction technology of cast-in-place piles, the single mechanical hole-forming process either has low hole-forming efficiency or shallow depth of penetration into the rock. Therefore, a single pile-forming machine generally has a cer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/38
CPCE02D5/38
Inventor 贾茂来薛鹏赵建林高峰
Owner 荣泰建设集团有限公司
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