Construction method for vibrator pipe sinking high-pressure grouting underpinning pile extracting

A technology of high-pressure grouting and construction methods, which is applied in the direction of sheet pile walls, foundation structure engineering, construction, etc., can solve the problems of hidden dangers left by construction, high cost, and large vibration and noise, and achieve improved bearing capacity, high work efficiency, and The effect of low vibration and noise

Active Publication Date: 2010-06-16
SHANGHAI ZHIPING FOUNDATION ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Punching and grabbing method: use a heavy hammer to crush underground obstacles (pile bodies), and then grab the debris with a grab bucket. The disadvantages of the punching and grabbing method are: large vibration and noise, long construction period, and high cost
Strong hoisting method: Large-tonnage cranes and other lifting equipment are used to forcibly lift and pull out. The disadvantage of the strong hoisting method is that underground obstacles are often pulled out, and underground piles cannot be completely removed, leaving hidden dangers for future construction.
Immersed tube water injection method: use mechanical power to pressurize the steel pipe, inject water to replace the soil around the pil

Method used

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  • Construction method for vibrator pipe sinking high-pressure grouting underpinning pile extracting
  • Construction method for vibrator pipe sinking high-pressure grouting underpinning pile extracting
  • Construction method for vibrator pipe sinking high-pressure grouting underpinning pile extracting

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Embodiment Construction

[0019] See attached figure 1 , attached figure 2 , The construction steps of the present invention include: vibrating the steel casing, grouting to strip the soil around the pile body, pulling out the pile and grouting underpinning. Excavate the pile top structure of the pile 1 to be pulled out and the soil around the pile 1 to expose the pile head, and sink the steel casing 2 to the design elevation of the pile 1 by using the vibration sinking method. Locator 3, the locator 3 is four pieces evenly arranged in the lower end of the steel casing 2 and fixed to the inner wall of the steel casing 2, the locator 3 is mainly to ensure the distance between the steel casing 2 and the pile 1, so as to facilitate the drill pipe 5 Drill down and lower the wire rope hoisting ring 4. Then the high-pressure rotary jetting drill pipe 5 is drilled down to the design elevation of the pile 1 along the inner wall of the steel casing 2 and the side wall of the pile 1. When the drill pipe 5 ris...

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Abstract

The invention discloses a construction method for vibrator pipe sinking high-pressure grouting underpinning pile extracting, which is characterized by comprising the following steps: vibrating and sinking a steel sleeve; grouting and stripping a pile body and peripheral soil body; extracting the pile; and grouting and underpinning. Compared with the prior art, the construction method has the advantages of small pile extracting force by only considering the self-weight of the pile body, low vibration noise, complete elimination of underground obstacles, and no hidden dangers remaining in subsequent pile foundation construction, great improvement on the bearing capacity of the foundation soil, and no influence on the peripheral environment. Meanwhile, the construction method has convenient construction and high working efficiency, and is a resource-saving and environment-friendly construction method.

Description

technical field [0001] The invention relates to pile foundations of building structures, in particular to a construction method for removing old structures and building pile foundations by vibrating immersed tubes and high-pressure grouting for underpinning and pulling out piles. Background technique [0002] At present, in the foundation and foundation construction of old building renovation projects, the removal of prefabricated piles, cast-in-place piles, steel piles and Wooden stakes etc. Punch grab method: Use a heavy hammer to crush underground obstacles (pile bodies), and then grab the debris with a grab bucket. The disadvantages of the punch grab method are: large vibration and noise, long construction period, and high cost. Strong hoisting method: Large-tonnage cranes and other lifting equipment are used to forcibly lift and pull out. The disadvantage of the strong hoisting method is that underground obstacles are often pulled out, and underground piles cannot be c...

Claims

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Application Information

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IPC IPC(8): E02D9/02
Inventor 陈富海唐红书
Owner SHANGHAI ZHIPING FOUNDATION ENG CO LTD
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