1Thoughts on tunnel water inrush in changing zones of groundwater level in karst areasZHENG Kexun, PEI Xiongwei, ZHU Daiqiang, WU Shuyu, GUO Weixiang473-4792Karst geological problems and countermeasures of the Huayingshan super-long tunnel on the Guang'an-Linshui highwayTANG Kehang, WAN Chuan, TAN Gang, CHEN Zilong480-4873Application of grouting sealing technology on karst high-pressure water inrush in a deep-buried extra-long tunnelHE Qiao, ZHU Daiqiang, ZHENG Kexun, ZHU Jianyun, HUANG Yong488-4954Influence of drainage on karst groundwater at an existing tunnel in the east-spring mountains, ChongqingHE Suhebateer, JIANG Liangwen, ZHANG Guitong496-5015Karst features of the Lianhuatai hydropower station and engineering significanceLYU Yaocheng, LI Yuqiang, ZHANG Furong, JU Guanghong502-5076Analysis on leakage of a karst reservoir in southwestern ChinaXUE Wei, YUAN Zongfeng, ZHOU Mi508-5147Karst geological conditions of the planned Ronglai reservoir in Guizhou ProvinceLIU Hao, TIAN Maozhong515-5238Application of the tracer test in karst hydrogeological prospecting:An example of Heilongtan, Lijiang, YunnanHAN Xiao, CHEN Xin, ZHENG Kexun, LIU Sheng524-5319Simulation of karst groundwater balance in the Westshan mountains, Heqing county, Yunnan ProvinceLIU Ruitong, WANG Jinguo, ZHOU Yun, HUANG Hua, CHEN Changsheng532-53810Formation mechanism of the karst spring in Dalongjing, Zhijin, Guizhou ProvinceMAO Jicheng, LIU Hong, ZUO Shuangying, HU Xuan539-54511Dynamic characteristics of karst water in underground rivers during dry seasons at the Yangniu village, Huaxi district, GuiyangDAI Tianhao, WANG Zhongmei, CHEN Yao, ZHANG Yadi, JIANG Jianxu, ZOU Lei546-55112Karst hydrogeology and risk assessment of the Huali tunnelTIAN Zutao, ZHANG Jun552-55813Stability assessment of the spoil ground on the Liupanshui-Weining expressway in Guizhou ProvinceSHEN Mingxiang, LUO Hongming, LIU Zhipeng, MU Risheng, PENG Kunjie559-56414Mechanism of geological hazards in the middle Permian collapse in the Wulingshan mountains of Guizhou ProvinceCHENG Pengxiang, LI Zongfa565-57215Application of the landsonar to detecting hidden hazards of tunnel base on high-speed railway in karst areasWANG Zefeng, ZHONG Shihang573-57716Geophysical characteristics and geological interpretation of karst strataTANG Kexuan, ZHAO Nan578-58317Analysis of foundation selection of a water-transmission aqueduct across a karst area in Guizhou ProvinceXIE Hongjian, WU Qingwen, YANG Wen584-59018Optimization of pile foundation for high-rise buildings in deep-covered karst areasLI Xiang, YIN Ji, WEI Jiaqi, WEI Maji591-59919A new technology of reinforcement by cast-in-place pile foundation in karst areasDU Hailong, HE Moli, LUO Xiaobin, BIN Bin, ZHAO Tiejun600-60620Technologies to deal with karst caves beneath pile foundation of the big bridge on the Laos-China railwayLI Qiang, Qin Yushun607-611 