Method for carrying out densely buckled concrete piling construction by drilling holes through flexible cutter

Abstract

The invention discloses a method for carrying out densely buckled concrete piling construction by drilling holes through a flexible cutter. A method for carrying out secondary drilling hole forming construction by a drill bit of the flexible cutter is adopted on transition round holes. Adjacent piles are mutually occluded. The defect of the poor waterproof effect of a conventional pile-pile tangency mode can be overcome. The construction quality and the stability of the integral foundation pit are ensured. An underground engineering structure is constructed under the lowest cost and the smallest construction risk. The feasibility and the economy of a reinforced concrete pouring and densely buckled construction technology are improved. The problem of overlapping among the piles is solved. The method disclosed by the invention has no specific requirement on the slow setting time of concrete and has the advantages that the method is mechanical and simple, is simple and convenient to operate and has low construction pollution and low noise pollution and low perturbation to surrounding buildings. The engineering cost is effectively reduced.

Description

technical field [0001] The invention relates to the field of concrete pile row construction, in particular to a construction method of close-knit concrete pile row with soft knife drilling, which is used for deep foundation pit support engineering structures. The construction process adopts a secondary hole-forming construction method. The construction method can It is used in the construction of closed-cut bored and cast-in-place piles in fields such as open-cut tunnel engineering, high-rise building engineering, and water conservancy engineering. Background technique [0002] There are many forms of pile row structures at present, and the commonly used construction structures, advantages and disadvantages correspond to the following: [0003] 1. Underground diaphragm wall, advantages: good water-stop performance, can withstand vertical loads with high rigidity, can retain soil, impermeability and load bearing; disadvantages: construction machinery costs are high, and const...

AI Technical Summary

Problems solved by technology

This process has the advantages of underground continuous wall, and has the advantages of low cost of machinery and high construction efficiency; it makes up for the defects of various existing foundation pit support methods, and forms an economical, relatively simple process and satisfies the barrier. The foundation pit row pile method required by the soil water stop, and can also improve the theory and method of deep foundation pit support in a certain sense

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