A Construction Method for Reducing Negative Frictional Resistance of Pipe Pile

Abstract

The invention provides a construction method used for reducing negative friction force of tubular piles. The construction method comprises the following steps of: step I, estimating depth of a negative friction force neutral point, and prefabricating or processing a connecting component, wherein the tubular pile connecting component is used for connecting the upper tubular pile to the lower tubular pile, the lower part of the tubular pile connecting component is fixedly connected with the lower tubular pile, and the upper part of the tubular pile connecting component is in sleeve connection with the upper tubular pile; step II, performing field leveling and pre-filling soil; step III, performing tubular pile construction; and step IV, performing foundation and building construction, and reducing negative friction force. The construction method can solve the post-construction settlement problem of a soft soil foundation, also greatly reduces or eliminates negative friction force, caused by post-construction settlement, used for the tubular piles, reduces quantity of foundation piles which resist negative friction force, achieves the purposes of being stable, economical and reasonable in structure, and has a very good use value and a very good popularization value.

Description

technical field [0001] The invention relates to the field of pile foundation engineering, in particular to a construction method for reducing the negative frictional resistance of pipe piles. Background technique [0002] In recent years, in some coastal cities, with the improvement of the marine economic development strategy, there has been an upsurge of land reclamation, and the newly added "land" by reclamation often still exists relatively thick under the filling and dredging filling layers. The silt layer and silty clay layer form a thick filling soft soil foundation site; however, the construction of the foundation and superstructure cannot wait until the filling soft soil foundation is consolidated. Therefore, the pile foundation design at this time is the most difficult. The most serious problem is the problem of negative friction of pile foundation in deep soft soil filling. In order to resist negative friction resistance, a large number of foundation piles must be ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a construction method for reducing the negative friction of pipe piles (prestressed pipe piles, steel pipe piles) for the incompletely consolidated foundation formed by reclamation, which can solve the problem of soft soil foundation. It can also greatly reduce or eliminate the negative frictional resistance acting on the pipe pile caused by post-construction settlement. It has the advantages of economy and simplicity, and has good use value and promotion value.

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