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Bag bottom expanding rigid-flexible combined pile and construction method thereof

A technology of combined piles and pockets, applied in sheet pile walls, foundation structure engineering, construction, etc., can solve the problems of uncontrollable bottom expansion effect and insufficient bearing performance of pile foundation, so as to improve the utilization rate of pile body and promote penetration range, the effect of ensuring continuity

Active Publication Date: 2014-04-23
ZHEJIANG TIANRUN CONSTR +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, in order to solve the problems of insufficient bearing capacity of the pile foundation and uncontrollable bottom expansion effect, it is urgent to invent a new type of rigid-flexible composite pile with different pile types and pocket bag grouting at the bottom.

Method used

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  • Bag bottom expanding rigid-flexible combined pile and construction method thereof
  • Bag bottom expanding rigid-flexible combined pile and construction method thereof
  • Bag bottom expanding rigid-flexible combined pile and construction method thereof

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Embodiment Construction

[0034] Prefabrication and transportation of various pipe piles, cement-soil mixing or rotary grouting construction technology, bag manufacturing process, grouting pipe connection technology and grouting grout ratio are not repeated in this embodiment, and the focus is on the implementation of the structures involved in the present invention. Way.

[0035] figure 1 It is a schematic diagram of a bag-bottomed rigid-flexible composite pile of the present invention; figure 2 It is a schematic diagram of the grouting channel at the pile connection place of the present invention; image 3 It is a schematic diagram of the arrangement of the expanded bottom bag in the present invention. refer to Figure 1~3 The rigid-flexible combined pile with pocket bottom expansion mainly includes: TSC pile 1, cement soil around the pile 2, PRC pile 3, PHC pile 4, pile end cement soil 5, and pile bottom expansion head 7.

[0036] Taking the cement-soil formed by the high-pressure rotary jet g...

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Abstract

The invention relates to a bag bottom expanding rigid-flexible combined pile. The bag bottom expanding rigid-flexible combined pile is formed by connecting the following prefabricated pipe piles including a TSC (prestress concrete thin wall concrete) pile, a PRC (prestress reinforcement concrete) pile and a PHC (prestress high-strength concrete) pile from top to bottom. The bottom end of the PHC pile is provided with a pile bottom expander packed by a bag; the inside of the prefabricated pipe piles is provided with a grouting duct; both ends of every pile is provided with perforated pipe pile joints, and the side wall of the pile at the bottom is provided with a grout outlet; the outside of the combined pile is packed by surrounding cemented soil. According to the bag bottom expanding rigid-flexible combined pile, based on the law of horizontal load bearing of the pile bodies inside soil, the prefabricated pipe piles with the anti-bending and anti-shearing performance gradually improved, which are connected in a combined mode, are sequentially planted inside the cemented soil, and the expanded is grouted after the bag with stable characteristics is set to improve the vertical bearing capacity of the piles, so that relatively higher technical and economical benefits can be obtained. The invention also discloses a construction method of the bag bottom expanding rigid-flexible combined pile.

Description

technical field [0001] The invention relates to a rigid-flexible combined pile with expanded bottom of bladder bag, in particular to a combined pile whose flexural and shear performance is gradually improved from bottom to top, and the pile bottom is provided with a high-pressure grouting bladder, which belongs to the field of foundation treatment. It is suitable for soft soil foundation treatment projects, especially for building pile foundation projects with non-rock-socketed piles and non-deep and hard bearing layers. Background technique [0002] The bearing capacity of the rigid-flexible composite pile foundation is provided by the pile and the soil between the piles. Through the construction of the rigid-flexible composite pile, the compaction and reinforcement of the soil between the piles can be realized, and the bearing potential of the foundation soil can be fully utilized and effectively solved. The problem of insufficient bearing capacity of the soil foundation. ...

Claims

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Application Information

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IPC IPC(8): E02D5/50
Inventor 叶喆宏姜平平胡旭东陈强王新泉
Owner ZHEJIANG TIANRUN CONSTR
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