Tool and method for smashing hard rock in large-diameter pile hole

Abstract

The invention discloses a tool and method for smashing hard rock in a large-diameter pile hole. Under the condition that hard rock exists in the pile hole in the pile forming process, low-cost rapid construction can be achieved. Guiding pipes are aligned and welded to an internal supporting frame of a guiding pipe bent frame, and the guiding pipes are aligned in parallel; the guiding pipe bent frame can be annular or square, and the guiding pipes are fixed on the guiding pipe bent frame and evenly distributed; a drilling rock stratum at the top of the drilled hole is completely removed through a pile hole forming drill jig, a pile hole retaining wall is downwards placed into a top hole collapse section, a bottom pile hole wall is kept stable, and the welded guiding pipe bent frame is downwards placed in, regulated to a vertical state and stably welded to the pile hole retaining wall 6; and a down-the-hole hammer is used for forming holes to designed depths along the guiding pipes, rock is smashed in a honeycomb shape, and then a pile is quickly formed through a conventional pile forming process. Compared with dedicated special equipment such as a large-caliber down-the-hole hammer and a high-power drill jig, the manufacturing cost is lowered by at least 50%, and the speed is increased by 3-4 times.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering. Background technique [0002] At present, the pile-forming technology in the field of geotechnical engineering is mature, and there are corresponding pile-forming techniques and applicable pile-forming equipment and equipment for Quaternary overburden, extremely soft rock, soft rock, soft rock, and relatively hard rock. And process selection is relatively simple, but currently there are few types of hole-forming processes and equipment for hard rocks, the selection is difficult and the cost is high, especially for large-diameter piles, except for large-diameter DTH hammers, there are almost none. Contents of the invention [0003] The technical problem solved by the present invention is to provide a pile-forming method, which solves how to construct quickly and at low cost when there is hard rock in the pile hole during the pile-forming process. [0004] The technical scheme a...

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Problems solved by technology

[0002] At present, the pile-forming technology in the field of geotechnical engineering is mature, and there are corresponding pile-forming techniques and applicable pile-forming equipment and equipment for Quaternary overburden, extremely soft rock, soft rock, soft rock, and relatively hard rock. The process selection is relatively simple, but there are few types of hole-forming processes and equipment for hard rocks, the selection is difficult, and the cost is high, especially for large-diameter piles. Except for large-diameter DTH hammers, there are almost no

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