Method for reducing negative friction in backfill area of cast-in-situ bored pile

The invention relates to a method for reducing negative friction resistance in a backfill area of a cast-in-situ bored pile, which comprises the following steps: according to the current situation of backfill soil in a loess high-fill area and the construction position of a subsequent pile foundatio...

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Bibliographic Details
Main Authors YANG XIJING, WU ZHENG, QI XIPENG, DANG TAO, REN LIJUN, LIANG HUI, SHAO YINGGANG, YE SUXIAN, CHEN QIANG, ZHANG HAOTIAN, MIAO MIAO, LEI WEI, CAO GENG
Format Patent
LanguageChinese
English
Published 06.12.2022
Subjects
EMBANKMENTS
EXCAVATIONS
FIXED CONSTRUCTIONS
FOUNDATIONS
HYDRAULIC ENGINEERING
SOIL SHIFTING
UNDERGROUND OR UNDERWATER STRUCTURES
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Summary:The invention relates to a method for reducing negative friction resistance in a backfill area of a cast-in-situ bored pile, which comprises the following steps: according to the current situation of backfill soil in a loess high-fill area and the construction position of a subsequent pile foundation, solidifying backfill soil in an area needing pile foundation pore-forming by using a high-pressure jet grouting pile, and performing pile foundation pore-forming construction after cement paste is solidified, so as to reduce the negative friction resistance in the backfill area of the cast-in-situ bored pile. The problem of hole wall collapse during loess high filling area pile foundation hole forming can be effectively solved, and the pile forming efficiency and quality of a pile foundation during pile foundation construction are improved. When a cast-in-situ bored pile is constructed, a longitudinal grouting main pipe, a horizontal grouting branch pipe and a grouting head are arranged on a reinforcement cage i
Bibliography:Application Number: CN202211278463