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Construction method for filling and building subgrade by using silty-fine sand as filling materials

A construction method and technology of silt and fine sand, applied in roads, roads, buildings, etc., can solve problems such as failure to meet compaction standards, achieve engineering construction quality assurance, meet the requirements of design and technical specifications, and ensure construction schedule requirements. Effect

Active Publication Date: 2014-11-26
SHENYANG RAILWAY SURVEY DESIGN CONSULTING CO LTD
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Problems solved by technology

Conventional subgrade filling construction cannot meet the compaction standard

Method used

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  • Construction method for filling and building subgrade by using silty-fine sand as filling materials

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Embodiment Construction

[0041] Note: The technical terms involved in this application, such as: A group, B group filler, improved soil, foundation coefficient K30, etc., all come from the industry standard of the People's Republic of China "Code for Design of Railway Subgrade" (TB 10001—2005 / J 447— 2005), and the entire construction and acceptance standards are also implemented with reference to this standard and related industry standards.

[0042] 1) The subgrade bed part shall be filled with improved soil according to the conventional filling method.

[0043] 2) Groups A and B of fillers are used below the foundation bed to wrap the edges. Specifically, the two sides of the road base are filled with fillers of groups A and B with a horizontal width of 2.0m, and the middle is filled with fine sand. Track-type bulldozers for compaction.

[0044] Emphasis in the present invention is below the foundation bed silty fine sand filling construction, introduce silty fine sand direct filling construction m...

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Abstract

The invention relates to a construction method for filling and building a subgrade by using silty-fine sand as filling materials. The construction method comprises the following steps that (1) a railway subgrade bed is subjected to edge covering by adopting filling materials in groups A and B, concretely, the filling materials in groups A and B with the horizontal width being 2.0m are adopted for filling and building at the two sides of the subgrade body under the subgrade bed, the silty-fine sand is adopted for filling and building in the middle, and a crawler type bulldozer is adopted for compact compression; (2) the subgrade bed is filled and built by adopting modified soil or qualified filling materials in groups A and B. The construction method has the advantages that the silty-fine sand is reasonably utilized, the engineering manufacturing cost is reduced, the defect caused by the subgrade filling and building by the silty-fine sand is overcome, the construction operability is high, the large-area construction is convenient, and the construction progress requirements can be ensured.

Description

technical field [0001] The invention relates to a civil engineering construction method. In particular, it relates to a construction technology and method for filling fine sand roadbeds. Background technique [0002] In railway engineering, highway engineering, and municipal engineering, a large amount of soil (or) stone filling must be carried out. The filling construction of earth and rock materials accounts for a very large proportion in the projects of these industries, and the construction methods and quality of earth and rock filling projects directly affect the quality and cost of corresponding projects. Therefore, master the construction technology theory and methods of earth and rock filling projects Very important. [0003] Subgrade filling construction usually adopts qualified general fillers (block stones, crushed stones, and gravel fillers in Group A and B fillers), and adopts layering, paving leveling, watering or drying, mechanical rolling (rollers), inspec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01B2/00E01C3/04
Inventor 金发良刘铁丰郭俊清王忠文杨庆云刘运泽陈效星陈必强李伟鲍雪银谭军周磊孙闯
Owner SHENYANG RAILWAY SURVEY DESIGN CONSULTING CO LTD
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