Open Channel and Longitudinal Cofferdam Project Attributed to CGGC.
承建的导流明渠和纵向围堰工程。
The second stage foundation pit of the TGP will be bounded by the upstream and downstream transverse cofferdams and the longitudinal concrete cofferdam.
三峡工程二期上下游横向围堰与混凝土纵向围堰共同形成基坑，保证二期工程施工。
The second stage construction area on the main river bed is formed by the second stage up & downstream transverse cofferdams and the longitudinal con crete cofferdam.
三峡工程二期上、下游横向围堰与混凝上纵向围堰共同形成二期基坑，测绘工作要求很高。
A longitudinal concrete cofferdam was demolished by way of underwater controlled blasting.
利用水下控制爆破方法拆除了大源渡河中的混凝土纵向围堰。
A longitudinal concrete cofferdam was demolished by way of underwater controlled blasting.
利用水下控制爆破方法拆除了大源渡河中的混凝土纵向围堰。
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