Multistage anchoring type resin anchor rod and anchoring method thereof
An anchoring and bolting technology, which is used in the installation of bolts, earth-moving drilling, mining equipment, etc., can solve the problems of tensile failure and inability to adapt to the deformation and displacement of the surrounding rock, so as to prevent the failure from being pulled, and eliminate the transmission superposition. Effects, Effects of Spreading Loads
Inactive Publication Date: 2014-04-30
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology
[0004] In order to solve the technical problem that the existing bolt cannot adapt to the deformation and displacement of the surrounding rock and is broken and fails, the present invention proposes a multi-section anchoring resin bolt and a construction method for the bolt
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[0020] Such as figure 1 , figure 2 The multi-segment anchoring resin anchor shown in the figure includes an anchor body 1 and an orifice pretensioner 2. The orifice pretensioner 2 is composed of a nut 2.1, a pressure spring 2.2 and a tray 2.3, and is arranged on the anchor body 1 at intervals. There is a point anchoring section, and the remaining sections are free sections; the point anchoring section is processed with a toothed ring knife 7 on the anchor body 1 of the section, and the toothed ring knife 7 is covered with a two-component resin anchoring drug roll 6, The two-component resin anchoring cartridge 6 is covered with isolation washers 5 at both ends; thus, the anchor rod body 1 is sequentially divided into the first free section 4.1, the first point anchoring section 3.1, the second free section 4.2, and the second Point anchoring section 3.2, third free section 4.3, third point anchoring section, the length of each point anchoring section and free section should e...
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The invention discloses a multistage anchoring type resin anchor rod and an anchoring method of the multistage anchoring type resin anchor rod. The multistage anchoring type resin anchor rod comprises an anchor rod body and an orifice pretensioner. Point anchoring sections are arranged on the anchor rod at intervals. Other sections are free sections. According to the point anchoring sections, tooth-shaped annular cutters are machined at the positions, provided with the point anchoring sections, of the anchor rod body. The tooth-shaped annular cutters are sleeved with two-component anchoring resin cartridges. The two ends of each two-component anchoring resin cartridge are sleeved with isolation gaskets. Accordingly, the anchor rod body is sequentially divided into the first free section, the first point anchoring section, the second free section, the second point anchoring section, the third free section and the third point anchoring section from an orifice, and it is required that the first free section is located in a surrounding rock loose area, the third point anchoring section is located in a surrounding rock elastic area, and other sections are located in a surrounding rod plastic area. The number of the point anchoring sections, the number of the free sections and the lengths of all the sections can be adjusted according to the surrounding rock pressure distribution characteristics, loads are dispersed, ultra-strong stress concentration is prevented from happening to the ends of the anchor rod, and the anchor rod body is prevented from breaking or being pulled out.
Description
technical field [0001] The invention relates to anchor rods for strengthening various rock mass engineering such as mine roadways, traffic tunnels, underground engineering, rock mass slopes, etc., and is especially suitable for reinforcing anchor rods for soft rock engineering. Background technique [0002] At present, the bolt anchoring method is mainly an end-anchor anchor or a full-length anchor anchor, which are composed of an anchor body, an orifice pretensioner and an anchoring agent. The technology related to the present invention is end-anchored bolts. The end-anchored anchor is equipped with a two-component resin anchoring agent at the bottom of the anchor body. This anchor is referred to as "resin anchor"; this "resin anchor" anchoring form is often formed at the anchoring end. In the stress concentration area, the rock mass around the anchorage end will be damaged, resulting in the failure of the bolt support, or the bolt will be broken due to the deformation of ...
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IPC IPC(8): E21D21/00E21D20/00
Inventor 王渭明高鑫
Owner SHANDONG UNIV OF SCI & TECH
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