Grouting-type self-expansion anchor rod structure
A self-expansion and grouting technology, applied in the installation of anchor rods, infrastructure engineering, sheet pile walls, etc., can solve problems such as poor anchorage of anchor rods, and achieve the effect of improving compactness and anchoring performance.
Active Publication Date: 2019-01-18
SHIJIAZHUANG TIEDAO UNIV +1
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Problems solved by technology
[0003] The purpose of the present invention is to provide a grouting type self-expanding bolt structure to solve the technical problem of poor bolt anchorage existing in the prior art
Method used
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specific Embodiment approach
[0028] see figure 1 , as a specific embodiment of the grouting type self-expanding bolt structure provided by the present invention, multiple groups of grouting holes 7 are arranged at equal intervals along the axial direction of the grouting section 14 to improve the anchoring effect.
[0029] refer to figure 1 and image 3 , as a specific embodiment of the grouting type self-expanding bolt structure provided by the present invention, the lateral telescopic expansion unit includes a plurality of steel arches 12 and a rotating hinge 11 connecting two adjacent steel arches 12 . Adjacent steel arches 12 are rotatably connected by means of rotary hinges 11. When the cables 10 are stretched, the adjacent steel arches 12 move closer to each other, so that the lateral telescopic expansion unit expands and squeezes the borehole, and extends into the drill hole. In the hole wall, improve the anchoring effect.
[0030] see figure 1 and image 3 , as a specific embodiment of the gr...
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The invention provides a grouting-type self-expansion anchor rod structure, and belongs to the technical field of rock mass reinforcing. The grouting-type self-expansion anchor rod structure comprisesa hollow grouting rod body and a lateral expansion device, an anchoring section is coaxially connected to one end of a grouting section of the hollow grouting rod body, a grout-stopping cap is arranged at the other end of the grouting section, and the grouting section is provided with diversion holes and multiple grouting holes communicated with the diversion holes; the lateral expansion device comprises a grout-blocking tray, a slide cylinder, multiple lateral telescopic expansion units and multiple inhaul cables, the grout-blocking tray and the slide cylinder are slidably arranged at the two ends of the grouting section respectively, the two ends of each lateral telescopic expansion unit are connected with the grout-blocking tray and the slide cylinder respectively, one ends of the inhaul cables are connected with the slide cylinder, the other ends of the inhaul cables penetrate through a penetrating hole, and with the assistance of external force applied to the inhaul cables, the lateral telescopic expansion units retract in the axial direction of the grouting section and expand outwards. According to the grouting-type self-expansion anchor rod structure, the compactability ofrock mass can be improved, the anchor rod structure can also tightly fit the pore-wall rock mass, and thus the anchoring performance of an anchor rod is improved.
Description
technical field [0001] The invention belongs to the technical field of rock mass reinforcement, and more specifically relates to a grouting type self-expanding bolt structure. Background technique [0002] In tunnel and slope engineering, bolts have been widely used in the reinforcement of fractured rock mass. In the current bolt anchoring technology, the bolt is usually a solid threaded steel bar. By grouting the gap between the solid bolt and the drilled hole, after the grout solidifies, the friction between the thread on the surface of the rod body and the grouting body is used to achieve Reinforcement of fractured rock mass. In engineering practice, this anchoring method has two disadvantages: (1) The anchor rod is wrapped by the grouting body, the contact surface between the two is limited, and it is not fully solidified to form a whole, and the anchor rod is easy to be removed from the grouting body. (2) Due to the influence of drilling unloading, the rock mass of th...
Claims
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Patent Timeline
Login to View More IPC IPC(8): E21D21/00E21D20/02E02D17/20E02D5/74
CPCE02D5/74E02D17/20E21D20/021E21D20/028E21D21/004
Inventor 袁维韩振中王安礼邱浩浩
Owner SHIJIAZHUANG TIEDAO UNIV