40-50cm ultra-large-thickness cement stabilized macadam base layer paving construction process

Abstract

The invention discloses a 40-50cm ultra-large-thickness cement stabilized macadam base layer paving construction process, which specifically comprises the following steps: a mixture is mixed and transported to a paving operation road surface, the mixture is conveyed to a spiral distributing device through a scraping plate in a hopper of a large-thickness paver, the mixture is spread in the full width direction by the spiral distributing device, a height-adjustable screed plate scrapes the mixture to a to-be-paved height, and the mixture is compacted by a rammer to form a paving surface; and then a road roller meeting the large-thickness construction requirement is adopted for rolling according to the sequence of initial rolling, re-rolling and final rolling. Through the ultra-large-thickness paving construction technology, the construction quality is guaranteed, the integrity of the base layer is provided, the production efficiency is improved, the flatness of the base layer is improved, and segregation is little; and highway quality is improved, highway diseases are effectively prevented, and the service life of the highway is prolonged.

Description

technical field [0001] The invention belongs to the technical field of road base paving construction technology, and in particular relates to a 40-50 cm super-thick cement stabilized crushed stone base paving construction process. Background technique [0002] At present, in the construction of highway pavements at all levels, the construction technology of layered paving and compaction of water-stabilized layers is basically adopted when the compaction thickness exceeds 20cm. The knot is not firm, the flatness is poor, the longitudinal joint is difficult to deal with, the overall stress condition is poor, and there is a big difference between the indoor test and the engineering construction, the construction control precision is low, the performance of the mechanical equipment is unstable, and the material segregation and other factors are affected. It often leads to insufficient filling of the voids of the gravel skeleton or too much filler, so that the mixture cannot form...

AI Technical Summary

Problems solved by technology

[0002] At present, in the construction of highway pavements at all levels, the construction technology of layered paving and compaction of water-stabilized layers is basically adopted when the compaction thickness exceeds 20cm. The knot is not firm, the flatness is poor, the longitudinal joint is difficult to deal with, the overall stress condition is poor, and there is a big difference between the indoor test and the engineering construction, the construction control precision is low, the performance of the mechanical equipment is unstable, and the material segregation and other factors are affected. It often leads to insufficient filling of the voids of the gravel skeleton or too much filler, so that the mixture cannot form a dense skeleton structure, resulting in more cracks and lower strength of the cement-stabilized gravel base. The service life of the upper layer of the road is significantly reduced, the driving comfort and safety are significantly reduced, the maintenance cost is increased, and the overall quality of the road is affected

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