[1] Weng Xiaolin, Cui Zhifang, Song Wenjia, Ma Haohao, et al. Response mechanism for widened pavement structuresubjected to ground differential settlement [J]. Journal of Southeast University (English Edition), 2013, 29 (1): 73-78. [doi:10.3969/j.issn.1003-7985.2013.01.015]

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Response mechanism for widened pavement structuresubjected to ground differential settlement()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

29

Issue:

2013 1

Page:

73-78

Research Field:

Traffic and Transportation Engineering

Publishing date:

2013-03-20

Info

Title:

Response mechanism for widened pavement structuresubjected to ground differential settlement

Author(s):

Weng Xiaolin¹;  Cui Zhifang²;  Song Wenjia¹;  Ma Haohao¹

¹Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an University, Xi’an 710064, China
² He’nan Zhongyuan Expressway Co., Ltd., Zhengzhou 450052, China

Keywords:

widened road;  full-size model;  finite element analysis;  additional stress;  critical differential settlement

PACS:

U416.16

DOI:

10.3969/j.issn.1003-7985.2013.01.015

Abstract:

By the use of a large-scale ground differential settlement simulator, a full-size model test is performed to study the strain response and the deformation behavior of both the wearing course of asphalt cement and the base course of cement-stabilized gravel. Moreover, with the differential settlement at the bottom of the pavement structure as the constraint condition, a plane finite element model is established, which is used to study the stress variation of different pavement layers in response to the differential settlement of varying magnitudes. It shows that, under the effects of the ground differential settlement, the wearing course is subjected to the tensile stress while the base course to the compressive stress and the maximum additional tensile stress and compressive stress occur in the area of 1 m from the splicing joint between the new and the old subgrade. Plastic deformation develops in both layers when the ground differential settlement reaches 14 cm. When the differential settlement at the bottom of the pavement goes up to 1 cm, the maximum additional stress in the surface of the base course will reach 0.28 MPa, which surpasses 0.276 MPa that is specified in the current specifications as the maximum splitting tensile strength for cement-stabilized base material.

References:

[1] Ma Xiaohui. Research on mechanic response of jointed pavement structure in highway widening project[D].Shanghai: School of Transportation Engineering, Tongji University, 2008.(in Chinese)
[2] Tan Zhiming, Yao Zukang. Structural analysis of concrete pavements on soft subsoils with differential settlements[J].The Journal of Geotechnical Engineering, 1989, 11(2):54-63.(in Chinese)
[3] Huang Qinlong, Lin Jianming, Qian Jinsong. Influence of pavement under discrepant deformation after construction between existing subgrade and that to be widened[J]. Journal of Tongji University: Natural Science, 2005, 33(1):759-762.(in Chinese)
[4] Allersma H G B, Ravenswaay L, Vos E. Investigation of road widening on soft soil using a small centrifuge [J].Transportation Research Record, 1994, 1462:47-53.
[5] Han J, Akins K. Use of geogrid-reinforced and pile-supported earth structures[C]//Proceedings of International Deep Foundation Congress. Orlando, FL, USA, 2002: 668-679.
[6] Habib H A A, Brugman M H A, Uijlting B G J. Widening of Road N247 founded on a geogrid reinforced mattress on piles[C]//Proceedings of the Seventh International Conference on Geosynthetics. Nice, France, 2002: 369-372.
[7] Fu Zhen, Wang Xuancang, Chen Xingguang, et al. Differential settlement characteristics and influencing factors of widening subgrade[J].Journal of Traffic and Transportation Engineering, 2007, 7(1):54-55.(in Chinese)
[8] Weng Xiaolin, Wang Wei, Liu Baojian. Model experimental research on deformation characteristics of widening loess roadbed and dynamic compaction method effect[J].China Journal of Highway and Transport, 2011, 24(2):17-22.(in Chinese)
[9] Weng Xiaolin, Zhang Liujun, Li Lintao, et al. Model test on control techniques for differential settlement of roading widening[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(1):159-164.(in Chinese)

Memo

Memo:

Biography: Weng Xiaolin(1980—), male, doctor, associate professor, wengxiaolin2000@sohu.com.
Foundation items: The National Natural Science Foundation of China(No.51008032), the China Postdoctoral Science Foundation(No.2011M501430), the Foundation of Central Universities of Ministry of Education(No.CHD2012JC011, CHD2011JC083).
Citation: Weng Xiaolin, Cui Zhifang, Song Wenjia, et al. Response mechanism for widened pavement structure subjected to ground differential settlement[J].Journal of Southeast University(English Edition), 2013, 29(1):73-78.[doi:10.3969/j.issn.1003-7985.2013.01.015]

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