Split full-length grouting anchorage facility

Abstract

The invention relates to a split type total-length grouting and anchoring device which belongs to slope reinforcement engineering. The split type total-length grouting and anchoring device is composed of an anchor rod, anchor bars, a counter-force steel plate and cement mortar, wherein the anchor bars are located in the anchor rod, the counter-force steel plate is located at the head end of the anchor rod, and the anchor rod is filled with the cement mortar. The anchor rod is anchored in an unstable body and a stable body of a side slope. The anchor bars are arranged side by side and are of unequal lengths, and the number of the anchor bars is three. Each anchor bar is divided into a cementation-free segment and force applied segments; each cementation-free segment is a segment of high-strength polyester tape wound on the corresponding anchor bar, and the exposed parts of the anchor bars are the force applied segments; the force applied segments of each anchor bar are located at the head end and the tail end of the corresponding anchor bar, and each cementation-free segment is located between the corresponding two force applied segments. The head ends of the anchor bars are all fixed on the counter-force steel plate of an anchor head. The formation strength of the free segment and the formation strength of the anchoring segment of the anchor rod can be achieved to the maximum degree through the split type total-length grouting and anchoring device, the progressive failure on the two sides of the sliding surface of a traditional total-length grouting type anchor rod is eliminated, and the carrying capacity of the anchor rod is improved to a great extent. The anchoring device is fast in construction, can be used under any soil layer and has low requirements for site size and net clearance, and the disturbance caused by construction in surrounding buildings is little.

Description

technical field [0001] The invention belongs to the category of slope reinforcement engineering, and specifically relates to a split-type full-length grouting and anchoring facility. Background technique [0002] In recent years, with the improvement of drilling equipment and the continuous improvement of hole forming technology, anchoring technology has become one of the most economical and effective methods to improve slope stability and solve complex high slope engineering problems. A large number of studies have shown that under the action of load, the bond stress of the bolt along the length direction has obvious inhomogeneity. The specific performance is that there is a relatively obvious stress concentration at the proximal end of the sliding surface, but the end of the anchor is almost unstressed. With the yield failure of the anchor tendon / mortar or mortar / rock-soil contact surface, the anchor will produce " Progressive" damage (see figure 1 ). However, the curre...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems existing in the current anchoring technology, the present invention proposes a split-type full-length grouting anchoring facility, which decomposes the traditional full-length grouting anchoring method into multiple anchoring units, and solves the problem in slope reinforcement engineering. Inhomogeneity of Bonding Stress of Anchor Rod along Length Direction under Moderate Load

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