Method for blasting pile well five-eye conical cut and structure

Abstract

The invention discloses a method for blasting a pile well five-eye conical cut and a structure. The method is operated according to the following steps of drilling, pore cleaning, powder charging, wiring, checking, erecting a steel tube support, laying a spring matress, pressing sand bags and blasting. The pore-forming method and pore opening covering adopted by the invention are all different from a pore-forming form and a covering form in common use; a five-eye conical cut method is adopted for a blast pore; pore forming can be realized through operating a drilling device by a worker, and the pore opening is covered; the spring mattress is laid on the steel pipe support, and the sand bags are pressed on the spring mattress to prevent flyrock at the pore opening; after pore forming by the method, the blasting control is accurate, the blasting loosening quality is good, the flyrock at the pore opening is controlled well, and no flyrock is at the pore opening basically; the sand bags are the bags which are filled with sand on the scene; a scaffolding steel pipe or a reinforcing steel bar can be used for the support, is available, can be used for many times; the spring mattress can be bought from a second-hand market, can be used repeatedly, and has low servicewear; and compared with a conventional steel tube support, more floor plates are saved and a better control effect is achieved..

Description

technical field [0001] The invention relates to a blasting method and structure, in particular to a blasting method and structure of a five-hole conical cut in a pile shaft, belonging to the technical field of building blasting. Background technique [0002] With the increase of high-rise and super-high-rise buildings, the design and construction of pile foundations is becoming more and more common, and its safety and reliability have also been recognized by everyone. However, due to the different geological structures and the requirements for designing rock-socketing, most of the pile foundations need to be drilled into the rock. If manual drilling is used to drill into the rock, not only the labor intensity is high, but the benefit is also extremely low. Considering the cost, progress and Under the premise of occupational health and safety, rock blasting is generally chosen, and the hole coverage during blasting is also particularly important, and its reliability directly ...

AI Technical Summary

Problems solved by technology

However, due to the different geological structures and the requirements for designing rock-socketing, most of the pile foundations need to be drilled into the rock. If manual drilling is used to drill into the rock, not only the labor intensity is high, but the benefit is also extremely low. Considering the cost, progress and Under the premise of occupational health and safety, rock blasting is generally chosen, and the hole coverage during blasting is also particularly important, and its reliability directly affects the construction safety on site.

Images