As a shaft sinking method adapted to go through unstable water bearing strata in thick alluvium, special shaft sinking methods have experienced major development in China during the past decades.

• 特殊凿井技术作为深厚表土不稳定含水地层的井筒施工方法,数十年来在我国得到了很大的发展,目前我国的冻结法凿井应用之广在世界上已名列前茅;