Bored under-reamed filling pile and fabricating method therefor

The technology of a bottom-expanding cast-in-place pile and its manufacturing method is applied in the field of drilled-bottom-expanding cast-in-situ pile and its manufacture, which can solve the problems of poor uplift bearing capacity, troublesome construction, long pile body, etc., and achieve the purpose of increasing the bearing area of ​​pile ends, The effect of simple construction and small investment

Inactive Publication Date: 2005-07-06
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used solution in the past is to use straight-hole uplift piles to provide uplift resistance. This is currently recognized as one of the most reliable methods. However, due to the poor geology in Shanghai, which is a soft soil foundation, ordinary straight-hole drilling and grouting Pile can only rely on peripheral frictional resistance to provide uplift bearing capacity, the pile body to be used is generally longer, the number of piles is large, and the investment is large
In addition, combined with different foundation design requirements, there are also various pile types in the project, such as rammed gravel concrete pouring piles at the bottom of holes, ra

Method used

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  • Bored under-reamed filling pile and fabricating method therefor
  • Bored under-reamed filling pile and fabricating method therefor
  • Bored under-reamed filling pile and fabricating method therefor

Examples

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[0014] The present invention will be further described below with reference to the drawings and embodiments.

[0015] The present invention mainly includes a pile body 1, which is characterized in that: the cast-in-place pile has an enlarged head 2 at the bottom of the pile body 1, and a reinforcement cage 3 is provided outside the pile body 1 during specific production and implementation. The enlarged head is made of concrete, its cross-section is isosceles trapezoid or conical, the inclination angle is greater than 30 degrees, the enlarged head is 1.5-2.5 times the pile diameter, and the entire pile is 30-70 meters long. A method for manufacturing a bored and expanded bottom cast-in-place pile, which is characterized in that: the method for making the cast-in-place pile includes the following steps: a. Measuring and lofting and positioning the pile position; b. Embedding the protective tube and placing the drill in place; c. The level of the grinding disc of the drilling rig and...

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Abstract

The invention discloses a bottom enlarged cast-in-place pile with dilled hole, wherein: the cast-in-place pile is arranged with an enlarged footing on the bottom. The enlarged footing of the invention formed by mechanical pressure and enlarged base drill bit enlarges the loaded area of the pile end and can provide more than two over three pulling-resistant force of the whole pile. The invention can satisfy the engineering demand of pulling-resistant load bearing, reduce the length and number of pile, simplify the construction and reduce cost.

Description

Technical field: [0001] The invention relates to the technical field of large-scale civil construction materials in the aspect of anti-floating and anti-tension of structures in engineering, in particular to a bored bottom-expanding cast-in-place pile and a manufacturing method thereof. Background technique: [0002] The underground water table in Shanghai area is relatively high, and the anti-floating of underground structures is often one of the important issues in underground engineering design. The commonly used solution in the past is to use straight-hole uplift piles to provide uplift resistance. This is currently recognized as one of the most reliable methods. However, due to the poor geology in Shanghai, which is a soft soil foundation, ordinary straight-hole drilling and grouting Pile can only rely on peripheral frictional resistance to provide uplift bearing capacity, the pile body to be used is generally longer, the number of piles is large, and the investment is ...

Claims

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Application Information

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IPC IPC(8): E02D5/44
Inventor 包旭范王海燕
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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