Construction method for out-of-terrace slurry retaining wall reinforced concrete cast-in-place pile

Abstract

The invention discloses a construction method for an out-of-terrace slurry retaining wall reinforced concrete cast-in-place pile. The construction method comprises the steps of first, foundation leveling, second, drilling and hole clearing, third, steel sleeve installation, fourth, reinforcement cage lifting, fifth, steel sleeve fixing, sixth, concrete pouring, seventh, steel sleeve removal, and eighth, pile head maintenance. According to the construction method for the out-of-terrace slurry retaining wall reinforced concrete cast-in-place pile, a terrace at the elevation position is directlyobtained through foundation leveling, site backfilling is reduced or even eliminated when the elevation of the site terrace cannot meet the actual construction requirements, and an earthwork operationprocess is reduced; meanwhile, soil excavation between piles in a later stage is eliminated, so that the construction progress is improved; and since a pile head protrudes out from the terrace, operators can directly observe whether concrete is poured out of the pile surface in the concrete pouring construction process, so that insufficient poured concrete or ultrahigh concrete caused by underground operation and the lack of experience or operational errors of operators is avoided, the common quality problem of the pile head of the slurry retaining wall concrete cast-in-place pile is solved,and the construction speed is increased and the construction quality is improved while ensuring green construction and construction safety.

Description

Technical field [0001] The invention belongs to the technical field of mud wall-protecting cast-in-place piles, and specifically relates to a construction method of a reinforced concrete cast-in-place pile with mud protective walls out of the ground. Background technique [0002] With the development of national economic construction, industrial and civil buildings, bridges, ports and wharves and other high-heavy buildings have increased. As a deep foundation, bored piles are used as deep foundations. The construction technology continues to mature through drilling rig research and development, instrument replacement, process summary and other means. More and more, more and more widely. The mud-protected reinforced concrete bored pile construction is a process of bored piles. Due to its concealment, complexity and continuity of the process, a series of quality accidents and common quality problems are prone to occur, especially the quality of the pile head is not good. Qualified...

AI Technical Summary

Problems solved by technology

The construction of reinforced concrete bored piles with mud retaining walls is a process of bored piles. Due to the concealment of the construction, the complexity and continuity of the process, a series of quality accidents and common quality problems are prone to occur, especially the poor quality of the pile head. Qualified is especially common. After the pile is excavated in the soil between the piles, it is easy to disturb the pile body and damage it, which brings great economic losses and safety hazards to the project.

Secondly, backfilling is required when the ground elevation is lower than the design elevation, which is time-consuming and labor-intensive. After the pile foundation construction is completed, the excavation efficiency of the soil between the piles is low, and it is seriously affected by rain and snow. At the same time, the pile foundation inspection is limited by the site, and the delay time Long, seriously affecting the construction progress

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