Carbonaceous rock roadbed structure and construction method thereof

Abstract

The invention discloses a carbonaceous rock roadbed structure and a construction method thereof. The construction method comprises the steps that a rubble layer is laid on the upper portion of an original roadbed soil layer, a rubble layer, a carbonaceous rock layer, an improved composite soil roadbed and a pavement structure layer are sequentially laid on the rubble layer, and a modified composite anti-seepage curing agent is evenly sprayed to a roadbed slope; the bottom surface of the rubble layer is a slope inclined to the drainage side, and the top of the rubble layer is a step-shaped horizontal slope surface; the top surface of the rubble layer is higher than the water line and is a slope inclined to the drainage side; each layer of slope surface of the carbonaceous rock stratum is aslope inclining to the drainage side, and the top surface of the carbonaceous rock stratum is a horizontal slope surface; the carbonaceous rock roadbed structure further comprises a drainage system. Disintegration and softening of carbonaceous rock are inhibited through the modified composite anti-seepage curing agent layer, the improved composite soil roadbed, the gravel layer and the rubble layer, the waterproof performance is improved, the strength and stability of the roadbed are guaranteed, the quality of the roadbed is improved, meanwhile, the carbonaceous rock and other waste materialsare fully utilized, and the utilization rate of soil resources is increased.

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...

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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

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