Design and Implementation of a Chain-Type Direct Push Drilling Rig for Contaminated Sites

Pinghe Sun, Shengwei Zhou, Han Cao, Guojun Cai, Shaohe Zhang, Qiang Gao, Gongbi Cheng, Biao Liu, Gongping Liu, Xinxin Zhang, Yun Liu, Dongyu Wu, Zhenyu Ding, Lan Zeng, Guangdong Liao, Leilei Liu, Xiaokang Wang, Ting Xiao, Jing Jin, Hanhan Yang