基于行车舒适性的土工格栅处治涵洞路基差异沉降技术

doi:10.11896/cldb.19070178

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Abstract At present, geogrid is used to treat the differential settlement of the bridge and culvert subgrade, which has been proved effective. In order to improve the utilization rate of geogrid in the subgrade treatment, this paper innovatively introduces the driving comfort index into the differential settlement control of the culvert retailing backwall subgrade. Based on the human-vehicle-road coupling system model, the influence of different types vehicle and different vehicle speeds on the maximum vertical acceleration of the human body was analyzed. The correlation between the vertical acceleration of the human body at different vehicle speeds and the differential settlement value was obtained by multiple regression calculations, and the subgrade differential settlement control standard in polyline subgrade mode based on driving comfort was proposed. By establishing the numerical calculation model of the culvert retailing backwall subgrade, the differential settlement of the top surface of the culvert subgrade under different geogrid laying methods, density, location, length and grid modulus was calculated and analyzed. The differential settlement layout scheme of culvert subgrade treated by geogrid based on driving comfort was proposed, and the scheme was verified by field test. The research results show that the length of the grid is the main factor affecting the treatment effect of the subgrade of the culvert. The proposed comfort-based culvert retailing backwall subgrade geogrid laying scheme can significantly improve the utilization of the grid and effectively control the differential settlement of the subgrade. The research results can provide theoretical value and reference significance for the laying of culvert retailing backwall geogrid in the mountainous area.

Key words： subgrade engineering culvert subgrade driving comfort geogrid differential settlement

Published: 23 February 2021

CLC number:

U449.5

Fund:This work was financially supported by Hebei Provincial Department of Transportation Science and Technology Project (JD-2020018), Gansu Province Science and Technology Major Project (1302GKDA009), Gansu Provincial Department of Transportation Science and Technology Project (2016-05), Gansu Luqiao Construction Group Science and Technology Project (2018-BXSG-QT17).

Corresponding Authors: wxc2005@chd.edu.cn

About author:: Longting Ding, a doctoral student at Chang'an University, major research interests in road materials and structures, and published more than 10 high-level papers at home and abroad.
Xuancang Wang, a second-level professor at Chang'an University, a doctoral tutor, an expert of government's Special Allowance by the State Council, and the Ministry of Transportation's “Wufu-Zhenhua Outstanding Teacher Award” in the Field of Transportation Education. He has won more than 40 provincial and ministe-rial level scientific and technological progress awards, more than 80 national invention utility model patents and software copyrights, published 7 monographs and textbooks, and published more than 300 papers.

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	DING Longting
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	FU Linjie
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	GOU Xiangwei

Cite this article:

DING Longting,WANG Xuancang,FU Linjie, et al. Research on Differential Settlement Technology of Culvert Subgrade Treated by Geogrid Based on Driving Comfort[J]. Materials Reports, 2021, 35(4): 4079-4087.

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http://www.mater-rep.com/EN/10.11896/cldb.19070178 OR http://www.mater-rep.com/EN/Y2021/V35/I4/4079

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