Carbonaceous Rock Subgrade Structure and Its Construction Method

Abstract

The invention discloses a carbonaceous rock roadbed structure and a construction method thereof, comprising paving a flake layer on the upper part of the original soil layer of the roadbed, and paving a crushed stone layer, a carbonaceous rock layer, an improved composite soil roadbed and a pavement structure layer on the flake layer in sequence , the subgrade slope is evenly sprayed with modified composite anti-seepage curing agent; the bottom surface of the flake layer is a slope inclined to the drainage side, and the top of the flake layer is a stepped horizontal slope; the top surface of the gravel layer is higher than the water level line, The top surface of the stone layer is a slope inclined to the drainage side; the slope of each layer of the carbonaceous rock layer is a slope inclined to the drainage side, and the top surface of the carbonaceous rock layer is a horizontal slope; the carbonaceous rock subgrade structure also includes a drainage system. The present invention inhibits the disintegration and softening of carbonaceous rock by modifying the composite anti-seepage curing agent layer, improving the composite soil road bed, the crushed stone layer and the flake layer, improves the waterproof performance, ensures the strength and stability of the roadbed, improves the quality of the roadbed, and at the same time Make full use of carbonaceous rock and other waste materials, and improve the utilization rate of soil resources.

Description

technical field [0001] The invention belongs to the technical field of road or railway construction engineering, and relates to a carbonaceous rock subgrade structure and a construction method thereof. Background technique [0002] Carbonaceous rock is a special rock that is easy to weather, crack, disintegrate, and soften, and its engineering properties vary greatly with the environment. It is distributed in large quantities in southwest regions such as Guangxi and Yunnan. Most concentrated; in the densely distributed areas of carbonaceous rocks mentioned above, a large number of expressways and railways need to be built. If roads need to be built on high and steep hillsides, cutting slopes to build roads will produce a large amount of waste carbonaceous rocks. [0003] In the process of realizing the present invention, the inventor found that there are at least the following problems in the prior art: if these waste materials are piled aside and cannot be used, they will o...

AI Technical Summary

Problems solved by technology

[0003] In the process of realizing the present invention, the inventor found that there are at least the following problems in the prior art: if these waste materials are piled aside and cannot be used, it will take up a lot of land resources and have a great impact on the surrounding environment

Studies have found that the performance of dry carbonaceous rock waste materials meets the requirements of roadbed fillers. However, in areas with more carbonaceous rocks, the climate is hot and humid and rainy. Under the action of rain, carbonaceous rock roadbed fillers are prone to disintegration and softening, resulting in subgrade Subsidence and other disasters

Images