A construction method of ultra-deep anti-sliding anchor pile retaining wall concrete

Abstract

The invention discloses a construction method of wall-retaining concrete for super-deep anti-sliding anchored piles. PVC ducts with the diameter phi of 150 mm are embedded in the wall-retaining concrete for wall-retaining concrete pouring in a next cycle; an operation window with the size of 20x20 cm is reserved on a wall-retaining concrete formwork to facilitate duct joint processing; and the upper and lower ducts are temporarily blocked through sealing covers or tapered protecting covers during concrete pouring and are connected through sleeves after pouring. The construction method guarantees the concrete conveying quality and avoids loss of the concrete workability and slump, and disintegration will not occur within 50 meters; hoisting space is not occupied during concrete pouring, excavation or muck removal can be synchronously carried out at the pit bottom, the work efficiency is improved, the construction speed is increased, and the overall cost is reduced; the concrete does notneed to be secondarily transferred and is not conveyed from a pit, concrete falling is avoided, and the safety performance is improved; and the concrete is conveyed through a pipeline, wall retainingconstruction can be continuously carried out without interruption, the concrete pouring time is shortened, and the quality is guaranteed.

Description

technical field [0001] The invention relates to the technical field of retaining wall construction, in particular to a construction method of ultra-deep anti-sliding anchor pile retaining wall concrete. Background technique [0002] The exit section of a high-speed railway tunnel at a speed of 350 kilometers per hour is shallowly buried, bedding, and biased. Pre-reinforced piles for reinforcement and protection. [0003] A total of 12 anti-slide anchor piles are installed on the right side of the line, the pile spacing is 7.0m, the pile length is 28-30m (the excavation depth is 30.92-47.57m), and the pile cross-section is 3×2m. The center distance of the line is 11-19.89m, the pile body is poured with C35 concrete, and the excavated part above the designed pile length is backfilled with C20 concrete. [0004] In the existing scheme, the lock is 30cm above the original ground, 2m deep, and the retaining wall is 25cm thick C20 reinforced concrete. The 1m section of the reta...

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Problems solved by technology

[0005] However, the existing scheme has the following disadvantages: ① It is time-consuming, labor-intensive, and labor-intensive to transport concrete vertically in the clear space, and it must be transported backwards to the pouring place before it can be put into the mold. The construction progress is slow and the construction cost is increased; ② Vertical transportation has high safety requirements. The requirements for wire ropes, suspension rings, and hoists are high, and the concrete attached to the bucket is easy to drip, which affects the safety of underground construction personnel; ③ Each anti-slide pile can only work in a single line when pouring the wall protection concrete, and cannot do other work. Low work efficiency and slow overall construction progress

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