无基坑水下筑坝技术的探索和实践

提出一种新的土石坝构筑方式然后把(简称无基坑水下筑坝技术):即利用枯水期,在适宜布置土石坝的河床上下游坝坡脚处抛填块石,形成戗堤,然后把有一定粒径要求的砂砾或石渣料进行堆填至出水面,随后,对填料进行加密处理以形成坝基平台。在平台上进行坝基防渗处理和大坝拦洪度汛体的施工。该方法可简化施工工序、提高工效,为一次截断河床,全年施工的土石坝度汛提供了重要的技术保障。

Non-Foundation-Pit Underwater Dam Construction Technology Research and Practice

A new kind of the earth dam structure has been introduced which can be called as the non-foundation-pit underwater dam construction technique. In the dry season,the stone rubbles were tipped in the proper place in the couch upstream and downstream of the earth dam,till the closure dikes were formed.Grits or rubbles with a certainty particle diameter particle diameter were tipped above the surface water between two closure dikes.The filled staff was densified into the dam foundation bench.Then the waterproofing treatment and flood retention barrier construction can be done on the platform of the same level.This technique has proved to simplify the working process,and increase work efficiency.It intercepted the river bed in one step and provided the earth dam construction with the significant technology support,especially increased the safety guarantee in the flood season.