Construction process using fine sand as subgrade filler

Abstract

The present invention relates to a construction process using fine sand as a subgrade filler. The construction process comprises: 1, determining an optimal water content; 2, determining a spreading thickness; 3, selecting construction equipment; and 4, controlling a rolling process, wherein the rolling process is divided into three stage, static pressing is performed one time with a bulldozer or avibration road roller, vibration pressing is performed 4-6 times with the vibration road roller, the speed is gradually increased during the rolling, vibration rolling is performed through strong vibration, the overlap width of the wheel tracks is not less than 1 / 3 m, the wheel tracks are distributed on the whole operation surface, the rolling driving speed is controlled at less than 4 km / h at the beginning stage, the rolling is performed on the straight section road surface from both edges of the subgrade to the middle, is performed on the curved section road surface from the inner side to the outer side of the subgrade, and is performed longitudinally forward and backward, the vertical overlap of the adjacent two forward-and-backward sections is more than 20 m so as to achieve effects of no pressing missing and no dead end and ensure the uniform rolling, and the vibration road roller uses 50-80 m as the unit rolling section, and rolls 4-5 times according to the follow sequences thatthe static pressing and the vibration are sequentially performed, the rolling is performed from the edge to the middle, and the speed is gradually increased. According to the present invention, the construction process is simple, fast, feasible, and has the reduced cost.

Description

technical field [0001] The invention belongs to the road paving construction technology, in particular to the construction technology using silty fine sand as roadbed filler. Background technique [0002] The existing road paving construction technology is developing rapidly, and the technology of using silty sand as roadbed material needs to be perfected to make it more feasible and efficient for paving. Contents of the invention [0003] The purpose of the present invention is to provide a construction technique using silt and fine sand as roadbed filler, which is simpler, faster, more feasible and lowers the cost. [0004] The purpose of the present invention is achieved like this: a kind of construction technology that adopts fine sand as roadbed filler, step 1, the determination of optimal water content: according to soil engineering test, fine sand indoor standard compaction test, the water content test interval is 11% to 14%, the optimum moisture content is 13.6%, ...

AI Technical Summary

Problems solved by technology

[0002] The existing paving construction technology is developing rapidly, and the technology of using fine sand as roadbed material needs to be perfected to make it more feasible and efficient for paving

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