Construction method for processing aeolian sand roadbed base through impacting and grinding

Abstract

The invention discloses a construction method for processing an aeolian sand roadbed base through impacting and grinding, which is characterized by comprising the following steps of: (1) preparing construction, i.e. carrying out measurement lofting, list clearing and levelling on an impacting and grinding segment; (2) checking moisture content; (3) impacting and grinding the roadbed base, i.e. controlling the longitudinal and horizontal movement of an impact-type road roller by an impact-type compactor which travels at constant speed; (4) checking the bearing capacity and the compactness of the roadbed base, i.e. detecting the compactness of a soil body by adopting two indexes, i.e. a compacting factor and a foundation factor, and using a sand replacement method; (5) checking the settlement amount of the roadbed base; (6) levelling the grinding surface of the roadbed base; and (7) carrying out vibrating compacting on the roadbed base. The invention applies the processing method impacting and grinding a roadbed to the construction of the aeolian sand roadbed base with large post-construction settlement amount caused by difficult compaction of the traditional construction process; and in addition, compared with the traditional processing method, i.e. a replacement method, a heavy-tamping method, and the like, the impacting and grinding method has the advantages of simpleness, convenience, fastness, labor and time saving, engineering cost reduction, and the like.

Description

technical field [0001] The invention relates to a construction method for treating aeolian sand subgrade base by impact rolling. Background technique [0002] With the great development of China's railways, the standards for subgrade compaction are getting higher and higher. At the same time, the operation of large-tonnage and high-speed railways has put forward higher requirements for the safety of existing lines. Especially in the quality control of roadbed construction in the desert, the desert roadbed base is all aeolian sand, the aeolian sand has a loose structure and low water content, and it is difficult to compact it with traditional construction techniques, resulting in a large amount of post-construction settlement. It is very expensive to adopt the filling method and dynamic compaction method for construction. How to save time and labor, improve the quality of the subgrade, and greatly reduce the project cost, what kind of base treatment construction method to use...

AI Technical Summary

Problems solved by technology

Especially in the quality control of roadbed construction in the desert. The base of the desert roadbed is made of aeolian sand. The aeolian sand has a loose structure and low water content. It is difficult to compact it with traditional construction techniques, resulting in a large amount of settlement after construction.

Images