Formula Development and Application of Wall Protection Slurry for Long-distance Horizontal Freezing Boreholes and Thorough PilesGuojing Jiang, Xiaomin Zhou, Fangzheng Li, Wei Gao, Jianrong Sun, Yufu Han and Zhigang YangE3S Web Conf., 218 (2020) 03026DOI: https://doi.org/10.1051/e3sconf/202021803026