Construction method of plastic casing occlusal pile

Abstract

The invention discloses a construction method of plastic casing occlusal piles. The steps are: (1) constructing the first pile holes at intervals; (2) lowering the first steel reinforcement cage carrying the first plastic hollow tube into the first pile holes , pour sand into the first plastic hollow tube; pour concrete in the first pile hole to form the first pile body; (3) construct the second pile hole between adjacent first pile holes; (4) carry The second reinforcement cage of the second plastic hollow pipe is lowered into the second pile hole, and sand is poured into the second plastic hollow pipe; then pouring concrete in the second pile hole forms the second pile body; (5) A high-pressure rotary jet drill is used to drill holes between the first pile body and the second pile body, and spray cement slurry to form cement mortar, and the cement mortar connects the adjacent first pile body and the second pile body as a whole. Utilizing the application, a single concrete pile body can be used to form a supporting wall with good water-stop performance and soil-retaining performance, without additionally setting a water-stop curtain.

Description

technical field [0001] The invention relates to a construction method of a plastic casing occlusal pile. Background technique [0002] The middle of the traditional support piles is generally 20cm, and the outer row is equipped with a water-stop curtain. The water-stop curtain is generally formed by overlapping cement-soil mixing piles. The support piles and the water-stop curtain are combined to retain soil and water. For foundation pit projects with strict deformation control and complex geological conditions, the combination of underground diaphragm wall and occlusal piles for retaining soil and water is usually used. [0003] The occlusal pile is a foundation pit enclosure structure in which the piles are interlocked with each other. The piles are arranged in a staggered arrangement of plain piles and meat piles. The plain piles are plain concrete piles without reinforcement, and the meat piles are Are on reinforced concrete piles. The overlapping concrete part between...

AI Technical Summary

Problems solved by technology

[0005] At present, occlusal piles are a common form of foundation pit support in engineering, but due to the high complexity of underground engineering and the limitation of construction technology, compared with bored piles, the cost is high, and the initial setting of plain pile concrete There are strict requirements on time, pile position deviation, and verticality deviation, otherwise problems such as poor quality of concrete joints between plain piles and meat piles will easily occur, resulting in water leakage and other accidents

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