Supporting structure for rock roadbed heightening and construction method

Abstract

The invention discloses a supporting structure for rock roadbed heightening and a construction method. The structure comprises a rock roadbed, prestressed anchor cables, a connecting rod, a wall panel, a connecting rod and geogrids. The prestressed anchor cables are obliquely arranged in the rock roadbed, the wall panel is arranged at the top of a cantilever type retaining wall and connected withthe cantilever type retaining wall through the connecting rod; a plurality of layers of the geogrids and fillers are arranged on the rock roadbed on the inner side of the wall panel to form a heightened roadbed. The shear resistance and rigidity of the cantilever type retaining wall can be effectively improved by installing the prestressed anchor cables, so that the deformation of the vertical wall is effectively reduced, and the stability and the normal use of the cantilever type retaining wall are ensured. The mounting of the wall panel can effectively improve the use height of the cantilever type retaining wall, and can ensure the stability of the plurality of layers of the geogrids. The prestressed anchor cables and the geogrids belong to flexible structures and are high in shock resistance, an existing cantilever type retaining wall is not dismounted, and thus the manufacturing cost is reduced.

Description

technical field [0001] The invention relates to road construction technology, in particular to a retaining structure and construction method for raising rocky roadbed. Background technique [0002] In the process of road reconstruction, it is difficult to avoid the situation that the elevation of the road surface increases, and the original supporting structure must be raised. The cantilever retaining wall is one of the commonly used retaining structures for fill slopes. The applicable height of the cantilever retaining wall should not exceed 6m. In actual engineering, the following problems may occur: [0003] 1. The design height of the existing cantilever retaining wall is not enough and needs to be increased. [0004] 2. Heightening the cantilever retaining wall will increase the earth pressure at the bottom of the retaining wall, which will cause the wall to overturn, crack and other damage. [0005] 3. The vertical wall of the cantilever retaining wall will produce o...

AI Technical Summary

Problems solved by technology

[0003] 1. The design height of the existing cantilever retaining wall is not enough and needs to be increased

[0004] 2. Heightening the cantilever retaining wall will increase the earth pressure at the bottom of the retaining wall, which will cause the wall to overturn, crack and other damage

[0005] 3. The vertical wall of the cantilever retaining wall will produce outward deformation. If the deformation of the vertical wall continues to accumulate, it will seriously affect the stability and normal use of the cantilever retaining wall itself

[0007] 1. The original cantilever retaining wall is demolished, and other supporting structures such as the buttress retaining wall structure are built; however, there are problems of damaging the environment, troublesome construction and high cost

[0008] 2. New unloading plate or pallet structure, but it will cause the deformation of the vertical wall of the cantilever retaining wall

[0009] 3. Add oblique prestressed anchor cables or vertical stress anchor cables to the original cantilever retaining wall; but a single measure cannot guarantee the overall stability of the elevated structure

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