A construction method for vibration forming cement stabilized crushed stone base

Abstract

The invention discloses a construction method of a vibration-formed cement-stabilized macadam foundation. The construction method comprises the steps of testing, paving, grouting, rolling, maintenanceand detection; a vibrating compaction tester composed of a supporting frame with through holes, a sliding plate and a moving frame is utilized, through static compaction and vibrating compaction, a compaction test outside an indoor imitation chamber is achieved, and the maximum dry density and optimal moisture content of different layers above and below a sample are obtained, thereby selecting appropriate vibration frequencies of a rolling bar and road roller; through the initial pressure of the rolling bar after each time of grouting and the overall rolling of the road roller after three times of grouting, even gap filling of a roadbed can be ensured, cracks are reduced, and the service life of a road is prolonged.

Description

technical field [0001] The invention relates to the technical field of traffic civil engineering, in particular to the technical field of a construction method for vibration-forming cement-stabilized gravel base. Background technique [0002] At present, most of the highways and urban roads in my country have been built with inorganic binder base and asphalt binder surface layer structure, of which the inorganic binder base is mostly cement stabilized gravel. Cement-stabilized crushed stone consists of aggregates and mortar, wherein the aggregates are graded crushed stones, and the mortar consists of water, cement and aggregates. The strength formation principle of cement-stabilized macadam pavement base is: use graded crushed stones as aggregates, use mortar to fill the gaps in the aggregates, and pave and compact according to the principle of embedded extrusion. , requires crushed stones to form a skeleton, with high overall strength and good board performance. However, ...

AI Technical Summary

Problems solved by technology

However, due to the different rolling degrees of the upper and lower layers of the base layer, the gap filling degree of the upper and lower gravel skeletons is different. If the gaps are not filled enough, the filling material will not be compacted, and if the gaps are too full, the gravel will not be able to form a skeleton. The "stone-stone" structure results in more cracks in the cement-stabilized macadam base, which will reflect upwards and cause corresponding cracks in the asphalt binder surface, which will affect the quality and service life of the road

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