A guiding device and method for drilling advance grouting bolt holes in tunnels
A technology of advanced grouting and guiding device, which is applied in the direction of drill pipe, drill pipe, earthwork drilling and mining, etc. It can solve the inconsistency between the direction of the drilling and the direction of the center line of the tunnel, the inconsistency of the circumferential spacing of the drilling, and the random influence of manual operation, etc. problems, to prevent rapid wear, reduce potential safety hazards, and improve work efficiency
Active Publication Date: 2018-10-02
CHINA RAILWAY NO 17 BUREAU GRP
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Problems solved by technology
[0006] The present invention solves the problem that the drilling stage of the current grouting bolt construction is often affected by the arbitrariness of manual operation, the direction of the drilling is inconsistent with the direction of the center line of the tunnel, and the circumferential spacing of the drilling is inconsistent, causing serious safety hazards. Technical problem, to provide a guiding device and method for tunnel advance grouting bolt drilling
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[0024] A guide device for tunnel advance grouting bolt drilling, comprising a spreader beam 5, a hanger 12 for connecting the spreader beam 5 and external connectors, a vertically connected to the left and right ends of the spreader beam 5 A pair of spreader vertical bars 4 and a pair of bearings 2 respectively installed at the end of each spreader vertical bar 4 for jacking up the drilling rod 1 .
[0025] The pair of spreader vertical bars 4 are rotationally connected to the left and right ends of the spreader beam 5 through a rotating shaft 6 respectively; a return spring 7 is connected between the two spreader vertical bars 4 .
[0026] The lower ends of the pair of hanger vertical rods 4 are all provided with suspension hooks 3, and the pair of suspension hooks 3 are horizontally oppositely arranged and there is an interval between the adjacent ends of the two suspension hooks 3; the pair of bearings are respectively installed on two One end adjacent to the suspension hoo...
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The invention relates to tunnel construction equipment, in particular to a guiding device and method for drilling holes of tunnel advance grouting bolts. It solves the technical problems that the direction of the drilling hole is inconsistent with the direction of the center line of the tunnel and the circumferential spacing of the drilling holes is inconsistent in the drilling stage of the construction of the grouting anchor rod at present, which causes potential safety hazards. A guide device for tunnel advance grouting bolt drilling, comprising a spreader beam, a hanger rod for connecting the spreader beam and external connectors, a pair of spreader verticals vertically connected to the left and right ends of the spreader beam Rod and a pair of bearings respectively installed at the end of each spreader vertical rod for supporting the drill pipe. The device improves the accuracy of the drilling direction during the pre-drilling process of the advance grouting anchor rod in the weak surrounding rock tunnel, thereby reducing safety hazards and significantly improving work efficiency. The device has the characteristics of reasonable design, convenient disassembly and assembly, and simple operation. It is suitable for construction occasions such as roads, railway tunnels, urban subways, hydraulic water diversion tunnels, and mine excavation.
Description
technical field [0001] The invention relates to tunnel construction equipment, in particular to a guiding device and method for drilling holes of tunnel advance grouting bolts. Background technique [0002] In order to improve the safety during tunnel excavation, in the process of excavating weak surrounding rocks of grades IV and V, in addition to using I-beam arches + steel mesh + shotcrete for closed support, grouting anchors are often used for support. Advanced support reinforcement. [0003] When pre-grouting bolt support, the root of the bolt is supported on the I-shaped steel frame close to the face of the tunnel, and the front end of the bolt goes deep into the surrounding rock of the vault, and the weak surrounding rock of the vault is improved by grouting under pressure. stability. For the sake of convenience, a pneumatic rock drill is generally used to drill the hole, and then the bolt is driven in before grouting; for the convenience of operation during drillin...
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IPC IPC(8): E21B19/24
CPCE21B19/24
Inventor 王新民潘树林涂齐亮郝玉强杨林李冰闫苏涛
Owner CHINA RAILWAY NO 17 BUREAU GRP