Calculation of Ultimate Bearing Capacity of Pile Foundations of Highway Bridges under the Coupling of Steep Slope and KarstZhongju Feng, Shaofen Bai, Wu Min, Jingbin He, Zhouyi Huang, Yunxiu Dong, Haibo Hu and Jixing YinE3S Web Conf., 198 (2020) 02017DOI: https://doi.org/10.1051/e3sconf/202019802017