软土地基岸滩抛石围堰变形规律研究

Deformation Study of Sluice Riprap Cofferdam on Soft Soil Foundation

在深厚软土地基条件下,抛石围堰容易产生沉降和整体滑移等变形。温州市某框架海堤工程施工中,采用Midas GTS NX有限元软件,对不同断面型式、不同施工次序下的岸滩抛石围堰进行数值分析。该实例分析总结了施工对抛石围堰产生的影响规律,结果表明:台阶式抛石围堰沉降相对较小,建议施工中先实施外海侧部分,可有效减小围堰整体的沉降,提高施工成效,节省成本。

Under the condition of deep soft soil foundation,riprap cofferdam is easy to produce deformation such as settlement and overall slip.Midas GTS NX finite element software is used to analyze the embankment riprap cofferdams with different section types and construction sequence in a frame seawall project in Wenzhou City,by which the influence law of construction on riprap cofferdam is summarized.Experimental results show that the settlement of stepped riprap cofferdam is relatively small.During constructing,it is recommended to implement the offshore part first,which can effectively reduce the settlement of whole cofferdam with high constructing effect and lower costs.