Experimental Research on Destruction Mode and Anchoring Performance of Carbon Fiber Phyllostachys pubescens Anchor Rod with Different Forms

The anchoring technology is extensively applied in reinforcing protection of the earth relics. Now that no specification is available for different new anchor rods in earth relics protection due to diversified destruction modes of earth relics and complexity of engineering technology conditions, it is urgent to guide reinforcing design and construction with a complete detailed anchor rod research document. With the new carbon fiberPhyllostachys pubescensanchor rod as the research object, six lots of in situ tests are designed to, respectively, study the destruction mode and anchoring performance of the carbon fiberPhyllostachys pubescensanchor rod under different anchor lengthL, anchor rod diameterD, bore diameterH, grouting materialS, rib spacingR, and inclination angleAin this paper. By studying load shift curve experiment in drawing of the anchor rod, the destruction mode and ultimate bearing capacity of the carbon fiberPhyllostachys pubescensanchor rod in different experiment lots are obtained, and the concept of permitted application valueNin anchor rod design is proposed. By studying strain distribution characteristics of anchor rods in experimental lots along the length direction under action of the permitted application valueNand combining the existing destruction mode and ultimate bearing capacity, this paper analyzes influences ofL,D,H,S,R, andAon anchoring effect of the carbon fiberPhyllostachys pubescensanchor rod; gives the reasonable value range ofL,D,H, andRwhen the carbon fiberPhyllostachys pubescensanchor rod is used for reinforcing design of the earth relics; and provides favorable experiment basis for reinforcing design of the earth relics based on the carbon fiberPhyllostachys pubescensanchor rod.

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