ANALYSIS BETWEEN NUMERICAL AND FIELD TESTS OF HIGH FILL REINFORCED WIDENING EMBANKMENT
WANG Jiaquan1，ZHOU Jian2，3，CONG Lin4，DENG Yibing5
(1. Department of Civil Engineering，Guangxi University of Technology，Liuzhou，Guangxi 545006，China；2. Department of Geotechnical Engineering，Tongji University，Shanghai 200092，China；3. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education，Tongji University，Shanghai 200092，China；4. Key Laboratory of Road and Traffic Engineering of Ministry of Education，Tongji University，Shanghai 200092，China；5. College of Ocean Environment and Engineering，Shanghai Maritime University，Shanghai 200135，China)
Abstract：Associating with mountain freeway widening project，the field test of high fill old and new embankments of geocell treatment was carried out to analyze the lateral displacement，settlement and soil pressure laws of high fill embankment，and the effect of geocell treatment is also studied. Based on field test，the three-dimensional thin membrane element is used to simulate geocell，and three-dimensional elastoplastic model is proposed. The geocell reinforced characteristics and the deformation law of high fill widening embankment by the sensitivity analysis of the relevant parameters are analyzed. The results show that the three-dimensional thin membrane element can better reflect treatment effect that geocell reinforces high fill embankment. Compared with the field test，the field reinforced effect by using numerical experiments is achieved，and the law of geocell treatment of high fill embankment through the analysis of parameter change of geocell，filling and the spacing of reinforcement materials is also achieved，and thus geocell reinforced mechanism is further discussed. Under itself gravity loads of widening embankment，the vertical displacement mainly is concentrated in the upper part of the widening embankment and lateral displacement gradually is reduced from the top surface to the bottom of embankment. Geocell layer plays the role in decentralizing the load transfer，reducing the lateral deformation and differential settlements. The higher moduli of filling and reinforcement material are，and the smaller reinforcement spacing is，and the reinforcement effect is better. The reasonable distance for the geocell spacing is 2–3 m. These conclusions may be useful to the design and analysis of reinforced-embankment on high fill and the interface between new and old embankments in widened embankment.
王家全，周健,丛林，邓益兵. 高填方加筋新旧路堤现场试验与数值模拟分析[J]. 岩石力学与工程学报, 2010, 29(S1): 2943-2950.
WANG Jiaquan1，ZHOU Jian2，3，CONG Lin4，DENG Yibing5. ANALYSIS BETWEEN NUMERICAL AND FIELD TESTS OF HIGH FILL REINFORCED WIDENING EMBANKMENT. , 2010, 29(S1): 2943-2950.
