Landslide mass upper deformation road outer retaining wall reinforcing structure and construction method thereof

Abstract

The invention discloses a landslide mass upper deformation road outer retaining wall reinforcing structure and a construction method thereof. The landslide mass upper deformation road outer retaining wall reinforcing structure is characterized in that a plurality of self-propelled hollow grouting anchor rods are arranged in a deformation retaining wall, a plurality of steel pipe piles which are internally provided with steel bar bundles and are poured and filled are vertically arranged at the bottom of the outer side of the deformation retaining wall, stepped enlarged foundations are fixed at the tops of the steel pipe piles; a fitting slope reinforcing layer is poured on the surface of the deformation retaining wall; and at least two rows of anchor cables connected with the ground are fixed on the deformation retaining wall. According to the construction method of the landslide mass upper deformation road outer retaining wall reinforcing structure, reinforcing construction can be conducted on the deformation retaining wall on the premise that an existing retaining wall is not dismantled, the landslide mass on the lower portion of the deformation retaining wall is deeply reinforced, the foundations are expanded after the anti-sliding force of a side slope is improved, half-range communication can be achieved, road breaking construction is not needed, the sliding resistance of the side slope is improved, the natural side slope is reinforced, and the phenomenon of uneven settlement or overturning of the retaining wall foundations can be effectively prevented.

Description

technical field [0001] The invention relates to the technical field of civil engineering construction, in particular to a reinforcement structure for a deformed road outer stop at the upper part of a landslide body and a construction method for a reinforced structure for a deformed road outer stop at the upper part of a landslide body. Background technique [0002] When building open-line highways in mountainous areas, in order to reduce the amount of excavation and support in the road during construction, retaining walls are generally built on the outside of the road, and then the subgrade is formed by filling inside the retaining wall, so most road sections use half-fill and half-fill Dig the way to pass through the natural slope. [0003] The surface layer of the natural slope is generally Quaternary slope accumulation, residual gravel soil or strongly weathered, strong unloading toppled deformed rock and soil mass. In general, the interface between the loose body on the...

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Problems solved by technology

However, these current treatment methods have certain shortcomings. The treatment method of removing the retaining wall and expanding the foundation reconstruction needs to demolish the existing retaining wall, deepen the foundation of the retaining wall and expand the foundation of the retaining wall. This method requires broken road construction, and its construction period is long. , high cost, high safety risk, and the sliding surface is built on the lower part of the retaining wall foundation, and the retaining wall is built on the upper part of the landslide body, which has not completely solved the engineering safety problem; Road construction, the construction period is long, the cost is high, and the safety risk is high; the treatment method of not demolishing the retaining wall and filling the slag to counter-press the slope toe of the retaining wall is simple in construction, but if the slope is steep, it will require a lot of land acquisition, which is wasteful. If slag is filled on the landslide body, the piled load may cause the slope to slide down at an accelerated rate; the treatment method of not removing the retaining wall and anchoring and spraying support can only treat the symptoms, not the root cause. Although the retaining wall is reinforced, the retaining wall The lower part is unstable, which is equivalent to a building built on the desert; the treatment method of not demolishing the retaining wall and installing anti-slide piles on the outside of the retaining wall foundation needs to excavate the pile foundation at the lower part of the deformed retaining wall, which has high construction safety risks and a long construction period. Long, high construction cost

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