Prestressed anchor system and construction method of slope protection device

Abstract

The invention discloses a pre-applied force anchoring system for a slope protection device and a construction method thereof. The pre-applied force anchoring system comprises a threaded rod (1), concrete bamboo joint blocks (2), connection discs (3), a spring (4) and a nut (5). The concrete bamboo joint blocks (2), the connection discs (3) and the threaded rod (1) form an integrated anchoring body (6), and the concrete bamboo joint blocks (2) and the connection discs (3) are arranged at intervals. The anchoring body (6) is placed into an anchor hole (7), and the gap between the anchoring body (6) and the anchor hole (7) is filled with concrete mortar. The nut (5) is screwed on the threaded rod (1) in a matched mode. The nut (5) tightly presses the slope protection structure and the concrete bamboo joint blocks (2) through the spring (4). The construction method is characterized in that all the concrete bamboo joint blocks (2), all the connection discs (3) and the threaded rod (1) form the integrated anchoring body (6), the anchoring body (6) is placed into the anchor hole (7), and the gap between the anchoring body (6) and the anchor hole (7) is filled with the concrete mortar. According to the pre-applied force anchoring system for the slope protection device and the construction method thereof, the construction speed can be increased, site construction is convenient and quick, the anti-drawing strength and the shearing strength are both ideal, and the constraint effect on soil bodies is good.

Description

technical field [0001] The invention relates to the field of reinforcement of swelling-shrinking soil slopes, in particular to a pre-stressed anchoring system and a construction method of a slope protection device for preventing the slope of swelling-shrinking soil from shallow sliding and collapsing. Background technique [0002] Expansion-shrinkage soil has significant expansion-contraction, fissures, and over-consolidation properties. The slope after excavation of the above-mentioned soil mass will undergo repeated swelling of water absorption and shrinkage of water loss under the action of atmospheric force. The expansion and contraction active layer will be formed; and the unloading relaxation deformation of the soil will occur due to the release of over-consolidation stress, that is, the unloading release layer will be formed. As a result, the structure of the surface expansive soil is loose, cracks develop in the dry season, and the intensity is very low in the rainy ...

AI Technical Summary

Problems solved by technology

[0004] The anchoring system and construction method of the slope protection device in the prior art have the following disadvantages: 1. After the anchor rod and the anchor cable are put into the anchor hole, it needs to be filled with cement mortar, the pouring amount on site is large, the construction speed is slow, and it needs to wait for the cement to dry 2. The bonding strength and frictional resistance of the anchor rod or anchor cable and the cement mortar are not ideal, resulting in unsatisfactory pullout strength of the anchorage system, which is not conducive to restraining the deformation of the soil; 3. After the body expands and contracts with the seasons, it is inevitable to form a gap between the pressure plate or the frame hoop, and it is difficult to adjust the tightness of the anchorage in the prior art, and it is impossible to apply pre-stress to the anchor rod and the anchor cable.

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