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

A hard rock, large diameter technology, applied in the field of geotechnical engineering, can solve the problems of high cost, difficult selection, and few types, and achieve the effect of reducing cost

Inactive Publication Date: 2016-07-27
DALIAN JIUDING XIANGRUI SPECIAL ENG TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

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Embodiment Construction

[0022] The hard rock crushing tool and method in the large-diameter pile hole of the present invention can be applied to large-diameter piles, and is mainly suitable for large-diameter piles with a diameter of not less than 800 mm. There is hard rock in the pile hole. Hard rock refers to saturated uniaxial Hard rock with a compressive strength greater than 60Mpa.

[0023] Wherein the crushing tool comprises a guide pipe 1 and an inner support frame 2 of the guide pipe bent frame, a pile hole retaining wall 6 and a small-aperture drilling rig bit 7, generally mostly a diamond drill bit or a down-the-hole hammer. see figure 1 and Figure 5 , first weld the inner bracket 2 of the guide tube bent frame, then adjust and weld the guide tube 1 to the inner bracket of the guide tube bent frame, the guide tube bent frame is welded firmly, and each guide tube 1 is parallel and aligned. The guide tube bent frame is generally in the form of a ring, with a guide tube in the middle and 4 ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D13/08
CPCE02D13/08
Inventor 卢明全林伟张洪军毕立坤
Owner DALIAN JIUDING XIANGRUI SPECIAL ENG TECH RES INST CO LTD
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