Method of pile foundation construction in miscellaneous fill region and sludge region

A construction method and technology of miscellaneous soil filling, which are applied in infrastructure engineering, sheet pile walls, buildings, etc., can solve the problems of difficult impact formation, silt trapped in manholes, waste holes or waste piles, etc., and reduce pollution. , The effect of avoiding drilling deflection and saving material costs

Inactive Publication Date: 2019-03-15
深圳市蛇口招商港湾工程有限公司
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Problems solved by technology

[0002] When carrying out pile foundation construction in shallow sea silt areas and miscellaneous soil backfill sites, due to the loose soil, after the drilling machine hits the piling point once to form a hole and pulls out the hammer head, the silt will quickly fill the hole, causing the hole to collapse.
Even the hammer head will b

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  • Method of pile foundation construction in miscellaneous fill region and sludge region

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[0045] The present invention will be further described in detail below with reference to the accompanying drawings.

[0046] A kind of pile foundation construction method in miscellaneous fill and silt zone, such as figure 1 shown, including the following steps:

[0047] P1: Construction preparation: Before the pile foundation construction, the geological conditions of the site should be verified, and the site impurities should be removed.

[0048] replace the soft soil with a depth of 0.6-1.0m in the upper layer, mix with 15% lime and mix on site, backfill after evenly mixing, level and compact with an excavator or road roller, sprinkle water for 7 days, and lay a road substrate to form a construction road , Between the construction access road and the construction site, it needs to be rolled and trimmed into a smooth slope, so that the drilling rig and construction vehicles can smoothly enter and exit from the construction access road. After the construction access road is...

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Abstract

The invention provides a method of pile foundation construction in a miscellaneous fill region and a sludge region, and relates to the technical field of pile foundation construction. The common problem that due to the fact that a drilled hole is prone to collapsing in the process that pile foundation construction is conducted in the shallow sea sludge region and the miscellaneous soil backfillingregion, an abandoned hole or an abandoned pile is caused is solved. According to the technical scheme, the method is characterized by comprising the steps of construction preparation, pile position lofting, fabrication and embedment of a pile casing, slurry preparation, drilling construction, inspection of a formed hole, hole cleaning, fabrication and installation of a steel reinforcement cage, installation of a guide pipe, hole cleaning for the second time, pouring of underwater concrete and removal of the guide pipe and the steel pile casing. The method of pile foundation construction in the miscellaneous fill region and the sludge region is suitable for pile foundation construction in the miscellaneous fill region and the sludge region and achieves the purposes that the pile foundationconstruction quality is ensured, and the construction efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of pile foundation construction, in particular to a construction method for pile foundations in miscellaneous fill and silt areas. Background technique [0002] When carrying out pile foundation construction in shallow sea silt areas and miscellaneous soil backfill sites, due to the loose soil quality, after the drilling machine hits the piling point once to form a hole and pulls out the hammer head, the silt will quickly fill the hole and cause the hole to collapse. It will even bury the hammer head, making it difficult to impact into a hole. Even if the hole is impacted, the hole will be easily collapsed when the steel cage is installed and cleaned for the second time, and the steel cage will be buried, resulting in waste holes or piles. The consequences are very serious and inherently need to be improved. Contents of the invention [0003] The purpose of the present invention is to provide a pile found...

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Application Information

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IPC IPC(8): E02D5/38E02D7/18E02D15/04E02D15/06E02D5/66
CPCE02D5/385E02D5/665E02D7/18E02D15/04E02D15/06E02D2250/0023
Inventor 刘英红
Owner 深圳市蛇口招商港湾工程有限公司
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