Combined steel casing and construction method of waterborne drilled pile based on same

Abstract

The invention discloses a combined steel casing and a construction method of a waterborne drilled pile based on the same. The combined steel casing comprises an outer steel casing and an inner steel casing which is arranged in the outer steel casing and comprises a steel casing body; the steel casing wall is provided with an opening contact seam along the axial direction; lockpin devices of the opening contact seam are alternately arranged on the casing wall at both sides of the opening contact seam; the lockpin devices comprise locking sleeves respectively connected with the casing wall of the opening contact seam; and the locking sleeves at both sides are connected by bolts. The drilled pile can be constructed in the inner steel casing capable of being opened and closed for repeated use. After the final setting construction of the drilled pile is finished, the bolts of the lockpin devices of the steel casing capable of being opened and closed for repeated use are drawn out, the inner steel casing capable of being opened and closed is pulled out, and the outer steel casing can also be pulled out. The steel casing can be pulled out for repeated use, greatly reduces the consumptionof the steel casing and decreases the construction cost.

Description

technical field [0001] The invention belongs to foundation construction methods, and in particular relates to a construction method of bored piles above water. Background technique [0002] At present, the construction method of bored piles on the water is to set up a drilling platform, sink and place a steel casing to form a hole, then clean the hole, and carry out pile foundation construction in the steel casing. Part of the steel casing is cut off, and the steel casing in contact with the pile body is not removed. The steel casing of this structure cannot be used repeatedly, and the materials for recycling the steel casing are few, the consumption of steel is large, and the cost is high. Contents of the invention [0003] The object of the present invention is to provide a construction method for above-water bored piles based on a combined steel casing and the combined steel casing to solve the above problems. [0004] Achieving one of the objectives of the present in...

AI Technical Summary

Problems solved by technology

The steel casing of this structure cannot be used repeatedly, and the material for recycling the steel casing is small, the amount of steel is large, and the cost is high

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