Construction waste improved expansive soil subgrade structure

Abstract

A Construction waste improved expansive soil roadbed structure comprises a roadbed surface layer and an expansive soil filling layer under the roadbed surface layer, wherein the expansive soil fillinglayer is arranged on a construction waste pore water protective cushion filling layer, inverted filter layers are arranged on both sides of the construction waste pore water protective cushion filling layer, and a construction waste improved soil filling layer is filled on both sides and above the expansive soil filling layer. The roadbed structure is reconstructed by adopting the mixed modification of construction waste in the expansive soil area and utilizing the non-uniform characteristics of the particle size of the broken construction waste, thereby reducing the engineering cost of the roadbed capillary water protection of the urban expressway, effectively utilizing the construction waste and reducing the environmental pollution at the same time.

Description

technical field [0001] The invention relates to the field of road construction in expansive soil areas, in particular to an expansive soil subgrade structure improved by construction waste. Background technique [0002] As the country enters the stage of high-speed economic development, urbanization is accelerating, and new rural areas and urban village renovation projects have started intensively. Garbage is directly transported to the suburbs and other urban fringe areas for landfill, resulting in increasing environmental and land pollution. With the urban construction driving the construction of inter-city expressways, for the construction of inter-city expressways in expansive soil areas, due to The water stability of expansive soil is poor, and the volume expands after rainwater, and the strength drops rapidly. However, due to the cost and material limitations in the construction of expressways, most expansive soils need to be used as roadbeds after relevant treatment d...

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Problems solved by technology

[0003] In order to solve the problem of high logistics cost and high material cost when the expansive soil area is transformed by using the closed covering method and the interlayer method in the prior art, the present invention provides a construction waste improved expansive soil subgrade structure. The district uses construction waste for mixed modification and utilizes the characteristics of the uneven particle size of the crushed construction waste to transform the roadbed structure, thereby reducing the cost of roadbed capillary water protection projects for urban expressways, and also effectively utilizing the construction waste. Garbage, reduce environmental pollution

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