汛期河道施工导、排流设计方案及技术要点

Design Schemes and Technical Essentials of Diversion and Drainage for River Channel Construction in Flood Season

为了提高城镇防洪能力,新开河道是一种快速有效的分洪措施。而新老河道交叉处的施工导、排流设计方案直接影响新开河道的顺利进行,具有重要研究意义。基于肖山冲水系改造工程特点,提出一套以土围堰及管桩围堰为主,降排水为辅的施工导、排流设计方案,分析相关施工技术重难点,总结围堰、基坑排水等技术要点,提出雨季及汛期施工导流方案注意事项,为类似工程提供参考依据。

In order to improve the flood control ability of cities and towns,the construction of a new river channel is a rapid and effective flood diversion measure.The design schemes of diversion and drainage for the construction at the intersection of new and old river channels directly affect the smooth process of the new river channel,which has the important research significance.Based on the Characteristics of Xiaoshanchong Drainage System Reconstruction Project,a set of construction diversion and drainage design scheme with the earth cofferdam and pipe pile cofferdam as the main part and the dewatering and drainage as the auxiliary part is put forward.The relevant key points and difficulties of construction technology are analyzed.The technical essentials of cofferdam and foundation pit drainage are summarized.The points for attention in the construction diversion scheme in the rainy and flood seasons are put forward,which provide the reference for the similar projects.