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Construction method for undisturbed soil pressure irrigation concrete pile with down-mounted pile top

A technology of undisturbed soil extraction and concrete pouring, which is applied in sheet pile walls, foundation structure engineering, construction, etc., can solve the problems that the pile top soil laitance cannot be completely removed, and the pile body contains mud, so as to save labor costs and reduce waste , the effect of improving efficiency

Active Publication Date: 2014-04-09
SHANGHAI STRONG FOUND ENG
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the quality problems in the prior art that the soil laitance on the top of the pile cannot be completely removed, and the occurrence of mud in the pile body, etc., and provide a kind of soil-absorbing and pressure-grouting concrete pile placed under the pile top. Construction method

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  • Construction method for undisturbed soil pressure irrigation concrete pile with down-mounted pile top
  • Construction method for undisturbed soil pressure irrigation concrete pile with down-mounted pile top
  • Construction method for undisturbed soil pressure irrigation concrete pile with down-mounted pile top

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Embodiment 3

[0088] Embodiment 3, in some cases, the hardness of the soil layer is relatively large, and it is necessary to carry out pilot hole drilling to loosen the hard soil layer. The specific construction process is as follows: a. Measure and locate, determine the center point of the concrete pile, and then use a special drilling rig to conduct the pilot hole; after the pilot hole, set the sheath tube around the center point; or bury the sheath tube first, and then lead the hole;

[0089] b. Place the sheath pipe vertically into the soil layer by means of vibration or pressing;

[0090] c. Align the center of the drill pipe with the pilot hole at the center point of the sheath pipe, and start drilling;

[0091] d. After drilling down to the design depth, first lift the drill pipe to the position where the drill bit valve can be opened, then start the concrete pump, pump concrete to the drill pipe through the pipeline, spray concrete from the lower end of the drill pipe, and continue ...

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Abstract

The invention provides a construction method for an undisturbed soil pressure irrigation concrete pile with a down-mounted pile top. A grab bucket is adopted for cleaning the pile top, so that the difficulty that the pile top which is positioned below a construction working surface is difficult to construct by the conventional construction method is solved; the shortcoming that soil laitance of the pile top is brought into a pile body and affects the quality of the pile body is overcome; the difficulty in construction of soft soil layers is also solved.

Description

technical field [0001] The invention relates to the technical field of foundation engineering, in particular to a construction method of an original soil-extracted pressure grouting concrete pile placed under a pile top. Background technique [0002] The undisturbed soil pressure pouring concrete pile overcomes the shortcomings of the widely used mud retaining wall rotary drilling into holes and pouring underwater concrete piles. If the replacement soil is broken and mixed with water during the pile formation process to form a mud that is about 3 times the volume, after normal , Reverse circulation discharge, resulting in a large amount of mud discharge; construction efficiency is extremely low, water and electricity consumption is serious, and serious quality defects such as excessively thick sediment, broken piles, and mud inclusions often occur. It inherits the advantages of long auger drilled grouting piles. First, special auger drilling tools are used to drill to the de...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/38
Inventor 刘全林宋伟民
Owner SHANGHAI STRONG FOUND ENG