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A platform for research: civil engineering, architecture and urbanism
Bendable expansion anchor rod
A bendable expansion anchor rod comprises expansion windowing faces and a hollow anchor rod body. The hollow anchor rod body is composed of multiple anchor rod body sections, two expansion windowing faces are arranged on each anchor rod body section, the upper edges of the expansion windowing faces and the lower edge of the anchor rod body are hinged through hinges, and the anchor rod body sections are in hinged connection through a first lug plate and a second lug plate. Sand which has certain grain diameter is adopted as a filling material of the anchor rod body, so that the requirement on airtightness of the anchor rod body is lowered. The expansion windowing faces after being jacked open by the filling material in the anchor rod body make contact with surrounding rock, and number of contact points between the anchor rod and a hole wall is increased, so that anchoring force is improved. After the windowing faces on the same anchor rod body section are opened, a straight-line anchor rod is changed into a broken-line anchor rod, so that the anchor rod can be used for anchor holes with bending curvature and can adapt to changes of the anchor holes due to rock stratum movement. The sand has fluidity when grain diameter is reduced to a certain degree, so that the sand and the anchor rod can be recycled by utilizing a pumping and draining device after anchoring operation is completed.
Bendable expansion anchor rod
A bendable expansion anchor rod comprises expansion windowing faces and a hollow anchor rod body. The hollow anchor rod body is composed of multiple anchor rod body sections, two expansion windowing faces are arranged on each anchor rod body section, the upper edges of the expansion windowing faces and the lower edge of the anchor rod body are hinged through hinges, and the anchor rod body sections are in hinged connection through a first lug plate and a second lug plate. Sand which has certain grain diameter is adopted as a filling material of the anchor rod body, so that the requirement on airtightness of the anchor rod body is lowered. The expansion windowing faces after being jacked open by the filling material in the anchor rod body make contact with surrounding rock, and number of contact points between the anchor rod and a hole wall is increased, so that anchoring force is improved. After the windowing faces on the same anchor rod body section are opened, a straight-line anchor rod is changed into a broken-line anchor rod, so that the anchor rod can be used for anchor holes with bending curvature and can adapt to changes of the anchor holes due to rock stratum movement. The sand has fluidity when grain diameter is reduced to a certain degree, so that the sand and the anchor rod can be recycled by utilizing a pumping and draining device after anchoring operation is completed.
Bendable expansion anchor rod
LIU JIE (author) / XU CHUNLIN (author) / LI JIANLIN (author) / YANG YU NAN (author) / WANG RUIHONG (author) / HE JIANWEI (author) / YU ZHENMIN (author)
2015-12-23
Patent
Electronic Resource
English
| European Patent Office | 2018