超深砂性基础拦河围堰防渗技术

Anti-seepage Technology of Deep Sand Foundation Cofferdam

以北支江综合整治上游水闸、船闸工程中围堰施工为例,介绍超深砂性基础拦河围堰的结构方案,并分别就该工程的上下游围堰进行围堰断面设计。采用简化毕肖普法对围堰稳定性进行分析,发现上下游围堰稳定性均满足规范要求。最后,对北支江综合整治上游水闸、船闸工程中超深砂性基础拦河围堰防渗的主要施工方法、技术参数及质量保证措施等进行详细阐述。

The construction of the cofferdam project for the comprehensive improvement project of the upstream sluices and ship locks project of Beizhi River was researched.The structural scheme design of the ultra-deep sand foundation cofferdam was introduced,and the cofferdam sections of the upstream and downstream cofferdams of the project were respectively designed.Afterwards,the simplified Bishop method was used to analyze the stability of the cofferdam.It was found that the stability of the upstream and downstream cofferdams could meet the specification requirements.Finally,the main construction methods,technical parameters and quality assurance measures were introduced for the ultra-deep sand foundation cofferdam in the comprehensive improvement project of the upstream sluices and ship locks of Beizhi River.