The present technique is a new thin cutoff wall construction method by modifying the original method as to use flat drill bit instead of cross bit and adopt positive and negative circulating system.

冲切成槽薄壁混凝土防渗墙施工技术是在原冲击成槽建造防渗墙的基础上，对冲击钻头和施工工艺加以改进，用扁钻头代替十字钻头，用正反两种循环系统进行泥浆循环的一种新防渗墙施工方法。

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It is essential to control assembly and welding deformations for large scale spheral tank with thin wall in order to guarantee spheral tank construction quality.

大型薄壁球罐组装及焊接变形的控制是保证球罐施工质量的关键，文章从球罐半成品、球罐组装及焊接工艺三方面介绍了控制球罐组装及焊接变形的措施。

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It briefly introduces the construction method for the main works of thin wall large cylinder breakwater engineering and summarizes some construction experience and matters needing attentions.

文章简要介绍薄壁大圆筒防波堤工程主要工序的施工方法，总结了一些施工经验及注意的问题。

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