High-pressure washing anchor planting and recharging comprehensive biological protection structure of soft and hard smashing interbedding type composite rock slope and construction method of structure

Abstract

The invention relates to a high-pressure washing anchor planting and recharging comprehensive biological protection structure of a soft and hard smashing interbedding type composite rock slope and a construction method of the structure. A retaining wall is arranged at the bottom of the slope, and self-compacting concrete is arranged in a crushed zone; slope anchor cables penetrate through an incompetent bed, and the bottom ends of the slope anchor cables extend into a hard rock layer; transverse frame beams and longitudinal frame beams are arranged on the surface of the slope, galvanized meshes are arranged in the longitudinal frame beams and the transverse frame beams and are filled with planting soil, and vegetation is planted on the planting soil. The construction method includes the steps that firstly, the retaining wall is arranged and reinforced on a retaining wall cushion layer; then, the crushed zone is drilled and cleaned, and holes are recharged with filling materials; the transverse frame beams and the longitudinal frame beams are poured in the slope, and the galvanized meshes are laid between the longitudinal frame beams and the transverse frame beams; the slope anchor cables penetrate and are inserted in the slope, and the ends of the slope anchor cables are fixed through anchors; finally, the planting soil is laid and the vegetation is planted. The slope protection structure has the advantages that the reinforcing effect is remarkable, self strength of rock is high, and the use amount of concrete and the use quantity of the anchor cables are small, and has good technological and economic benefits.

Description

technical field [0001] The invention relates to a rock slope protection structure and a construction method, in particular to a soft and hard broken interlayer composite rock slope high-pressure flushing, anchoring and recharging comprehensive ecological protection structure and a construction method. Background technique [0002] In the construction of expressways in mountainous areas, it is inevitable to encounter a large number of composite rock slopes. At present, for rocky slopes in China, the main construction method is shotcrete or shotcrete protection. This construction method is slope surface protection, which is not suitable for soft rock interbedded composite rock slopes, and the slope protection The method requires a large area of ​​sprayed grout or shotcrete, and the construction period is long and the construction cost is high. In the case of severe weathering and fracture of rock formations, well-developed joints, and thicker broken rock formations, the method...

AI Technical Summary

Problems solved by technology

For example, a slope protection structure (authorized announcement number CN20131133541), a drainage ditch is set on the top of the slope to reduce the rock mass sliding caused by a large amount of rainwater washing in the rainy season, and steel barbed wire is used to anchor the slope to protect the surface of the slope. However, this method The broken blocks and weak layers in the rock stratum cannot be treated, and the rock stratum is prone to slip-crack damage; another example is the highway flexible slope protection structure (authorized announcement number CN203977436u), which uses anchor rods to anchor the slope deeply, and the surface adopts The method of laying galvanized mesh is used for protection. However, this method has not yet dealt with the rock fracture zone, which is prone to slip-crack damage. The surface is covered with galvanized mesh on a large area, and the construction requirements for the overlap of galvanized mesh are high.

[0004] To sum up, the existing slope protection structures have carried out different degrees of deep anchorage and shallow protection measures, which have reduced the slope slip-crack damage, block slip damage, slip-tear-crack- Shear damage, etc., but there are still things that can be improved, mainly reflected in the incomplete treatment of the weak rock formations and broken zones of the slope, and the difficulty of surface protection construction, etc.

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