Rapid Treatment Method for Grout Leakage of Large Diameter Pile Foundation

Abstract

The invention relates to a rapid processing method of the grout leakage of a large-diameter pile foundation. The processing method comprises the steps of preparing for construction, positioning and paying off, processing steel sheet piles, inserting stiffening steel sheet piles, constructing the pile foundation, pulling out the steel sheet piles and processing pile holes. The first stiffening steel sheet piles and the second stiffening steel sheet piles of the same structure are inserted into the periphery of a steel casing in sequence at equal intervals, and then the second steel sheet pilesare inserted between the first stiffening steel sheet piles and the second stiffening steel sheet piles at equal intervals, so that protection piles on the periphery of the steel casing are formed; the first stiffening steel sheet piles, the second stiffening steel sheet piles and the steel sheet piles are inserted and sunk along the periphery of the steel casing, so that the bottom ends of the protection steel sheet piles pass through a grout leakage area to reach a stable support layer, a small cofferdam protection circle is formed, the grout leakage path is obstructed, and the drilling construction is smoothly operated.

Description

technical field [0001] The invention relates to the field of pile foundation construction foundation engineering, in particular to a rapid treatment method for large-diameter pile foundation grout leakage. Background technique [0002] At present, with the rapid development of bridge construction technology, various heavy and difficult bridges have been built and passed smoothly, and the construction technology of bored piles has become increasingly mature. In the pile foundation construction organization of various large bridges, bored piles are becoming more and more common. Before drilling the cast-in-situ pile, it is necessary to set out the line and lower the steel casing in advance. The steel casing can protect and guide the drilling process, and it must be ensured that the steel casing can be lowered into the hard rock formation to prevent drilling. During the drilling process, adverse phenomena such as slurry leakage occurred, which affected the overall construction...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a rapid treatment method for large-diameter pile foundation grout leakage in the pile foundation construction of existing large bridges, and the pile foundation grout leakage treatment still has grout leakage and the effect is not ideal. Add a circle of stiffened steel sheet piles around the periphery of the large-diameter steel casing, sink the bottom of the stiffened steel sheet piles through the slurry leakage layer (range) and reach the stable bearing layer, forming a small cofferdam protection ring to block the mud leakage path to ensure the smooth progress of drilling construction; in addition, this method is simple in structure, convenient and fast in construction, improves construction efficiency and ensures construction quality

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