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| Research on the In-situ Monitoring of Post-construction Settlement of Bridge-subgrade Transition Section |
| JIA Liang1, LIANG Rong1, YAO Kai2 |
| (1.Lanzhou University of Technology, Lanzhou, Gansu 730050, China; 2.National University of Singapore, Singapore 117576, Singapore) |
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Abstract Abstract：Research purposes： The settlement of back fill behind abutment is the main cause for the differential settlement and the vehicle bumping at bridge-head. To explore the post-construction settlement of bridge-subgrade transition section under self weight and vehicle load, in- situ monitoring of subgrade settlement is carried out on the Lanyon highway. Settlement cells are embedded in various depths of the driveway and the shoulder of highway. Long- term settlement monitoring is conducted to investigate the variation of settlement with time and space, to provide a basic data for future research on bridge-subgrade transition section in highway construction. Research conclusions： (1) The settlement of highway shoulder is greater than that of the driveway;(2) The settlement of subgrade will increase with time, while the settlement of bridge-subgrade transition section tends to be stable after one year;(3) The vehicle load has insignificant effect on the subgrade settlement;(4) Logarithm models can predict the post-construction settlement of the subgrade accurately;(5) This research achievements can provide the reference for the design and construction of bridge-subgrade transition section.
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Received: 29 March 2017
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2017, Vol. 34 
