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| Experiment and numerical simulation on interaction between piled bridge foundation and stabilizing piles in the slope with intercalated layer |
| FU Zhengdao1，2，JIANG Guanlu1，2，LIU Qi1，LIAO Dan1，WANG Zhimeng3 |
(1. School of Civil Engineering，Southwest Jiaotong University，Chengdu，Sichuan 610031，China；2. Key Laboratory of
High-Speed Railway Engineering，Ministry of Education，Southwest Jiaotong University，Chengdu，Sichuan 610031，China；
3. China Railway Eryuan Engineering Group Co.，Ltd.，Chengdu，Sichuan 610031，China) |
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Abstract When stabilizing piles are installed close to or far away from the piled bridge foundation in the slope，the shear deformation of soils around the bridge foundation may produce significant lateral loading and cause the deflection of bridge piles. A project on railway line from Chengdu to Lanzhou was investigated experimentally and numerically regarding the interactions between the bridge foundation and stabilizing piles. The results show that the maximum bending moment occurs close to the interface of the intercalated layer and bedrock. Because the rear stabilizing piles are installed so near the bridge foundation，the interaction between them is significant. The bearing mode of rear stabilizing pile installed directly behind the bridge foundation comes closer to the anchor anti-slide pile due to the resistance of the bridge foundation. A major part of the lateral load is concentrated in the pile cap correspondingly. Compared with the front stabilizing piles，the rear stabilizing piles have an obvious advantage to minimize the shear deformation of soils around the bridge foundation. The lateral displacement of the pile cap decreases firstly and then increases with the increasing distance of rear stabilizing piles. There is an optimal location for rear stabilizing piles which can decrease the lateral displacement of the bridge foundation effectively. To make the front stabilizing piles work at full capacity，the piles should be installed near the bridge foundation.
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2018, Vol. 37 
