Construction method of plastic sleeve secant pile

Abstract

The invention discloses a construction method of a plastic sleeve secant pile. The construction method comprises the following steps of: (1) constructing first pile holes at intervals; (2) putting down first reinforcement cages carrying first plastic hollow pipes into the first pile holes, pouring sand into the first plastic hollow pipes, and pouring concrete into the first pile holes to form first pile bodies; (3) constructing second pile holes between the adjacent first pile holes; (4) putting down second reinforcement cages carrying second plastic hollow pipes into the second pile holes, pouring sand into the second plastic hollow pipes, and pouring concrete into the second pile holes to form second pile bodies; and (5) drilling holes between the adjacent first pile bodies and second pile bodies by adopting a high-pressure rotary jet drill, and spraying cement paste to form cement mortar, wherein the cement mortar connects the adjacent first pile bodies and second pile bodies into a whole. By utilizing the construction method, a supporting wall with good water stopping performance and soil retaining performance can be formed by adopting a single concrete pile body, and a water stopping curtain does not need to be additionally arranged.

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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