A Ground Treatment Method for Eliminating Negative Frictional Resistance

Abstract

The invention discloses a ground treatment method for eliminating negative frictional resistance. The negative frictional resistance produced by the self-weight consolidation of soil is treated by combining loose piles and flexible piles. The loose piles can be gravel piles or sand piles. The stone piles, loose piles and flexible piles are arranged in rows at intervals, and a gravel soil cushion is laid on the upper foundation surface. The present invention reduces the consolidation settlement of the foundation soil itself through construction compaction and vibration density of loose piles, and then transmits the load to the bearing layer of the base through the construction of flexible piles, so as to reduce the stress and compression deformation of the reinforcement area, And due to the joint action of bulk piles and flexible piles, the effect of "squeezing" and "holding" on the soil between the piles is produced, and the consolidation settlement of the foundation soil and the negative friction resistance caused by it are restrained. At the same time, through drainage consolidation and replacement of flexible piles, the composite foundation treatment method also greatly improves the bearing capacity of the foundation.

Description

Technical field [0001] The present invention belongs to the special foundation processing field in geotechnical engineering, involving a foundation method for eliminating resistance resistance. Background technique [0002] The pile foundation is widely used in engineering practice with its strong adaptability, high load capacity, and small sedimentation.In general, under the working characteristics, piles bear most of the upper loads, which have a downward displacement compared to the soil.In some cases, the pile side soil will generate downward displacement relative to the pile, thereby generating downward rubber resistance to the pile body, which is called negative rubber resistance (NSF).Due to the existence of negative rubber resistance and the drop -down load (the total of the resistance resistance) generated on the pile body, it may cause destruction of the pile body, the soil of the pile ends, or the uniform settlement of the foundation.How to reasonably consider the impa...

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Problems solved by technology

[0013]Technical problem: the present invention is aimed at the newly deposited under-consolidated soil site where the negative frictional resistance effect is gradually increasing, but the processing and solution methods are single and backward, and it is difficult to In order to effectively solve the problem of negative friction resistance and ensure the design requirements of foundation settlement deformation and bearing capacity structure, it provides a method of constructing loose piles first, and then constructing flexible piles. The combined use of the two kinds of piles can well eliminate the Ground Treatment Method for Eliminating Negative Friction Resistance Effect Caused by Soil Consolidation

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