Pile-forming method for cast-in-place pile in coral sand foundation

Abstract

The invention discloses a pile-forming method for a cast-in-place pile in a coral sand foundation. The method is characterized by comprising: reinforcing a piling position of a cast-in-place pile and the coral around by preliminary grouting, such that a column body isolated from the peripheral foundation and underwater is formed, then piling in the column body. The construction method is characterized in that after the grouting of certain depth is finished, a grouting pipe is lifted, and then the grouting process is repeated, such that reinforced areas of different depths are equal. According to the size of the area to be reinforced, single, three or a plurality of grouting pipes can be uniformly arranged symmetrically. The pile-forming method is easy to realize, simple and convenient to operate, low in cost, and capable of effectively reducing a side friction resistance caused by stressing and breaking of the coral sand and attenuation of a pile end bearing force, and is a good method for forming the cast-in-place pile on coral reef.

Description

technical field [0001] The invention relates to a pile foundation construction method, in particular to a pile forming method in coral reef sand foundation. Background technique [0002] Coral reefs are rock and soil bodies formed by the remains of reef-building coral groups after long-term geological processes, and the main component is calcium carbonate. my country's modern coral reefs are mainly distributed in the South China Sea Islands and the northern coast, and the islands and reefs in the South China Sea are basically composed of coral reefs. Coral reefs are almost the only type of land in my country in the South China Sea. All of my country's current military and fishery facilities in the South China Sea are built on coral reefs without exception. [0003] Pile foundation refers to a deep foundation composed of piles and pile caps (referred to as caps) connected to the top of the piles or a single pile foundation connected by columns and pile foundations. The clas...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the technical problem of coral reef sand broken due to drilling on the coral reef sand site, as well as the technical problem of reducing the side friction resistance and pile end resistance of cast-in-situ piles due to the broken coral reef sand, as well as the groundwater problem. Pile forming method of bored pile in coral reef sand

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