Sand-filling roadbed construction method

A construction method and sand-filling technology, which can be applied to roads, roads, buildings, etc., can solve problems such as high construction costs and shortage of construction resources, and achieve the effects of eliminating common quality problems, avoiding soil erosion, and using local materials

Pending Publication Date: 2018-07-31
CHINA CONSTR FOURTH ENG DIV
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a sand-filled subgrade construction method to solve the problems of shortage of expressway subgrade construction resources and high cost in areas where existing land resources are scarce

Method used

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Examples

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Embodiment

[0020] Taking a certain road located on the west side of the Linjiang River in the Xianghu New City area of ​​Nanchang County as an example, it is basically arranged parallel to the outside of the slope foot on the east side of the current Gandong Levee, 0-40m away from the slope foot. The start point is K0+200.238, the end point is K4+600, the total length is 4.4km, and the average filling thickness is greater than 2m. The groundwater level is mainly controlled by the climate and the waters of the Ganjiang River, with an average of 5.75m.

[0021] 1. Analysis of key issues in sand-filled subgrade construction

[0022] Fine sand is non-viscous, has dilatancy, shear resistance, small cohesion, large internal friction angle, and large permeability coefficient. When saturated loose sand is shaken, sand particles will be suspended in water and become liquid-like. The sand can be cohesive into agglomerates, and it will loosen after soaking in water, which has poor stability.

[0...

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PUM

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Abstract

The invention discloses a sand-filling roadbed construction method. The sand-filling roadbed construction method comprises the following steps of measuring and laying off, original surface cleaning and road camber forming, excavating horizontal and vertical drainage blind drains, laying drainage blind drain anti-seepage geotechnical cloth, backfilling graded broken stone processing, paving seepagegeotechnical cloth, fine sand layering filling and compaction, surrounding soil filling and compaction, and roadbed prepressing and settlement observation. In the sand-filling roadbed construction, fine sands used as a roadbed filler is river sands with fine grained sands, silt content of the fine sands is no larger than 5%, optimum water content of heavy compaction standard is 9%-12%, and maximum dry density is 1.53g/cm<3>-1.58g/cm<3>. The problems of resource shortage and high cost of express way roadbed construction in an existing the area with shortage land resources are solved. The invention belongs to the technical field of the roadbed construction.

Description

technical field [0001] The invention relates to a roadbed construction method, which belongs to the technical field of roadbed construction. Background technique [0002] With the rapid development of urban social economy and the continuous improvement of the city's motorization level, road traffic flow presents a trend of rapid increase, and road traffic congestion is further aggravated. Urban expressways can effectively relieve traffic pressure and bring convenience to residents. The development of urban expressways is an important part of China's urban development. The subgrade construction of urban expressways has a greater demand for soil sources and higher requirements for the quality of soil sources. How to carry out expressway subgrade construction in areas with scarce land resources is an urgent problem to be solved. Contents of the invention [0003] The object of the present invention is to provide a construction method of sand-filled subgrade to solve the pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/04E01C3/00
CPCE01C3/00E01C3/04
Inventor 姚伟贺彭振峰何强龙周翔
Owner CHINA CONSTR FOURTH ENG DIV
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