This paper introduces the main manufacture technologies and sinking method of large caisson.

本文介绍大型沉井施工的主要技术。

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The freezing method became the preferred shaft sinking method when constructing in thick alluvium and unstable aquifer.

冻结法已成为深厚冲积层及不稳定含水层的首选施工方法。

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This paper analyses the piston effect problem in dellling shaft sinking method and its detriments. In the meantime, the approaches of solving the problem are proposed by the author.

本文分析了钻井法凿井中所出现的钻井活塞效应问题及带来的危害．提出了解决钻井活塞效应的方向和途径。

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