Down-the-hole drill follow-pipe hole-forming backfill concrete stable free face collapse processing construction method

A construction method and down-the-hole drilling technology, which are applied in earth-moving drilling, vertical well equipment, wellbore lining, etc., can solve the problem that the extension surface of the collapse cannot be supported, and achieve the effects of wide application range, simple construction technology and low cost.

Active Publication Date: 2014-05-07
SINOHYDRO BUREAU 5
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Problems solved by technology

[0003] In the tunnel excavation and subsequent deformation treatment construction, the tunnel collapse treatment adopts the form of anchor shotcrete support, and the anchor shotcrete is used to seal the cracks in the surrounding rock to strengthen and protect the surrounding rock, but the extension surface of the collapse cannot be supported.

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  • Down-the-hole drill follow-pipe hole-forming backfill concrete stable free face collapse processing construction method

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Embodiment Construction

[0021] The specific embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0022] as attached figure 1 As shown, the down-the-hole drill and the pipe forming hole of the present invention backfill the concrete to stabilize the empty surface and deal with the landslide construction method, and the specific steps are as follows:

[0023] The first step: seal the collapse cavity 6 with sprayed concrete to prevent the slag from injuring people after the collapse, and pull out a small platform at the position of the collapse cavity 6, and pile up sand bags (not shown in the figure) to seal it. Concrete with a thickness of 20cm is sprayed on the outside of the bag to strengthen the strength of the sand bag; the thickness of the sand bag is between 2.5m and 3m; the sand bag is bonded with sprayed concrete layers when stacked.

[0024] Step 2: pull out a platform inside the supported steel arch 1 at the bottom o...

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Abstract

The invention relates to a down-the-hole drill follow-pipe hole-forming backfill concrete stable free face collapse processing construction method which comprises the following steps: spraying concrete into a collapsed cavity to carry out sealing; drawing a platform inside an erected steel arch at the bottom of a backfill concrete layer, erecting a construction platform on the platform by utilizing a scaffold and installing a down-the-hole drill on the construction platform; when the down-the-hole drill drills to the collapsed cavity from the backfill concrete layer through collapsed slag bodies, enabling the down-the-hole drill to exit a drilling tool and enabling a steel pipe to be left inside the backfill concrete layer, the collapsed slag bodies and the collapsed cavity; communicating one end of the bottom of the steel pipe with a pump pipe of a concrete delivery pump and spraying the concrete into the steel pipe until the collapsed cavity is full filled with the concrete. The down-the-hole drill follow-pipe hole-forming backfill concrete stable free face collapse processing construction method disclosed by the invention has the superior effects of simple construction process, low safety risk, high construction efficiency, low cost, wide application range and excellent effects.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a down-the-hole drilling and pipe-forming hole-forming backfilling concrete stabilization method for dealing with landslides on the empty surface. Background technique [0002] In recent years, China's water conservancy and hydropower construction projects have developed rapidly, and the number and scale of projects under construction have reached unprecedented levels. Tunnels are a common type of hydraulic structures, such as diversion tunnels, diversion tunnels, and flood discharge tunnels. During the construction of tunnel excavation and support or post-deformation treatment, different degrees of landslides often occur due to various reasons, such as geological, earthquake, design and human factors. At this time, it is necessary to support the landslide, and the landslide treatment itself is a construction technology with great difficulty and high safety risk. es...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10
Inventor 姜凌宇张卫林杨万华
Owner SINOHYDRO BUREAU 5
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