Highway pavement subbase construction method

Abstract

The invention relates to a highway pavement subbase construction method, and belongs to the technical field of building construction. The method is used for improving the strength of gravelly soil andimproving and utilizing an existing soil source to enable an originally substandard material to reach the technical standard of a subbase material of a pavement. According to the construction method,30% of gravels are doped into 70% of gravelly soil according to a mass ratio, the gravelly soil is improved, a land leveler and a road roller are matched to stir and compact the mixed gravelly soil and a gravel mixture, the mixed gravelly soil and original gravel particles in a soil body jointly form a framework structure, a bearing capacity of the soil body is improved, and deformation resistance of the subbase is enhanced. The actually measured deflection value of the gravelly soil subbase after the gravelly soil subbase is improved by mixing the gravelly soil is obviously improved, and thegravelly soil subbase improved by the gravelly soil is more compact in structure.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a construction method for a highway pavement subbase. Background technique [0002] The subbase of the road is the main bearing layer of the road pavement load, and the subbase requires high strength to bear the road load. At present, the general subbase construction methods are mainly in the form of graded gravel, limestone, water-stabilized gravel, etc. Although the material strength is high, the construction cost is relatively high, which is not conducive to the use in areas with underdeveloped economy and low traffic volume. . [0003] Red gravel soil with iron-manganese nodules is widespread in a certain place. The gravel soil generally has low strength and relatively poor test indicators such as liquid-plastic limit, which cannot meet the requirements of the subbase material required by the code. In order to meet the requirement of low cost of road construct...

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Problems solved by technology

At present, the general subbase construction methods are mainly in the form of graded gravel, limestone, water-stabilized gravel, etc. Although the material strength is high, the construction cost is relatively high, which is not conducive to the use in areas with underdeveloped economy and low traffic volume

[0003] Red gravel soil with iron-manganese concretions is widespread in a certain place. The gravel soil generally has low strength, and the test indicators such as liquid-plastic limit are also relatively poor, which cannot meet the requirements of the sub-base material required by the specification.

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