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

A technology of impact rolling and construction method, applied in the direction of roads, roads, road repairs, etc., can solve problems such as large settlement, low water content, loose aeolian sand structure, etc., and achieve the effect of reducing project costs

Active Publication Date: 2013-03-27
NO 1 ENG CO LTD OF CHINA RAILWAY 22ND CONSTR BUREAU +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings of the description.

[0024] Introduced with the selected YCT25A triangular impact compactor, such as figure 1 As shown, its construction process is as follows:

[0025] The construction preparation stage includes (1) compiling the construction plan, formulating the construction methods and technical measures of the main projects; (2) providing technical training to the construction personnel, familiarizing with the design drawings, and making technical disclosure; (3) carrying out measurement and lofting in the impact and rolling test section ;Placing the centerline piles and side piles of the line, in order to ensure that the edge base of the subgrade is fully compacted, each side is widened by 1-2m, and the scope of scouring and rolling is marked with a lime line, and clearly marked with a small red flag, so that the driver can identify it; ( 4) According to the avoi...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C3/04E01C19/28
Inventor 施德旭徐高山徐冬青杨金有王伟周兵役李猛庞前凤赵传标唐水波李晓飞李心剑肖春春
Owner NO 1 ENG CO LTD OF CHINA RAILWAY 22ND CONSTR BUREAU
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