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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Main Authors | , , , , , , , , , , , , |
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Format | Patent |
Language | Chinese English |
Published |
06.12.2022
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Subjects | |
Online Access | Get full text |
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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 |
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Bibliography: | Application Number: CN202211278463 |