Construction method of rear-embedded pile foundation

A construction method and pile foundation technology, which is applied in the direction of foundation structure engineering, foundation structure repair, sheet pile wall, etc., can solve the problems of not suitable for the overall foundation reinforcement of buildings and industrial equipment, complicated process, etc., and achieve quality assurance and safety and reliability Sexuality, simple operation, good economic and social benefits

Inactive Publication Date: 2012-12-12
河北省建筑科学研究院有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the patent process is complicated and not suitable for the overall foundation reinforcement of construction and industrial equipment

Method used

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  • Construction method of rear-embedded pile foundation
  • Construction method of rear-embedded pile foundation
  • Construction method of rear-embedded pile foundation

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] The post-implantation pile foundation construction method of the present invention, as figure 1 As shown, using the original building foundation 1 to increase the implanted pile foundation at the base of the original building, the specific steps are as follows:

[0023] (1) Hole formation: Excavate the original building foundation 1, dig out the lead hole 4 outside the building foundation, dig and implant the pile hole according to the design, the implanted pile hole includes 2 parts of the pile body and 7 parts of the enlarged head, and the enlarged head part The lower part is a pot-bottom-shaped structure. Such as image 3 As shown, the expansion head 7 is supported by the anchor rod 5, and the anchor rod is a radial structure. Anchor rod 5 puts into reinforcement cage after artificially forming a hole, and pours plain cement slurry. The anchor rod is a ra...

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Abstract

The invention relates to a construction method of a rear-embedded pile foundation. By utilizing an original building foundation, an embedded pile foundation is added on the original building foundation, and the construction method comprises the following steps of: (1) digging a hole on the outer side of the original building foundation, and digging and embedding a pile hole according to design; (2) embedding the pile hole when digging at every 0.5-1.0 meter, and carrying out once retaining wall support by utilizing concrete; (3) hacking the bottom of the original building foundation, lowering a reinforcing steel bar, binding a reinforcing steel bar cage in the formed hole, and lowering a grouting pipe; (4) pressing the concrete into a base expanding pier by a concrete conveying pump and maintaining; and (5) after pouring the concrete for 40-60 hours, flushing the grouting pipe by water, and carrying out pressure grouting, wherein the ratio of water to ash of slurry is 1 to 0.4. According to the invention, through hole introduction at the outer side of the original building foundation to dig the hole, the concrete is poured to the formed hole to form the pile, the bearing capacity of the original building foundation is effectively improved, a space of the original building is fully utilized, and the construction method has good economic benefit and social benefit.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and relates to a method for strengthening the overall foundation of a building, in particular to a post-implantation pile foundation construction method. Background technique [0002] With the development of urban construction, in order to save land, the original buildings need to be renovated, added floors or increased use load for some purpose. If the bottom floor is to be demolished and multi-storey and high-rise buildings are rebuilt, it is necessary to consider the difficulty of demolition and analyze its economic indicators. Underpinning technology is an effective way to solve this problem. Underpinning methods include foundation widening and deepening underpinning, decorative underpinning, base addition and subtraction and strengthening of stiffness, tree root pile underpinning, grouting underpinning or deviation correction underpinning, etc. The above-mentioned underpinning...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D37/00E02D5/44
Inventor 王维玉梁玉国王利广李仕良赵拓王凤恩翟广涛李建波曹海勃何晓晨脱腾
Owner 河北省建筑科学研究院有限公司
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