摘要
覆盖层渗流稳定性的控制是深厚覆盖层上修建高土石围堰的关键技术之一。分析了覆盖层的变化原因,从渗流压力的角度,运用有限元数值分析的方法,采用ABAQUS软件计算分析围堰水下抛填以及河道冲刷使覆盖层发生的变化对其渗流特性的影响。工程实例分析表明,对于具有复杂条件深厚覆盖层的河道,在围堰的施工组织过程中,堰基的覆盖层厚度以及材料特性参数等都会发生变化,覆盖层的渗流特性随着其厚度以及材料特性的变化而改变,渗流压力特征值呈递增趋势,与实际情况相符。
The control of seepage stability of covering layer is one of the key technologies of building high cofferdam on deep overburden. The paper analyzed the reasons for the change of covering layer from the perspective of seepage pressure,used the method of numerical analysis of finite element,calculated and analyzed the influence of filling of underwater part of cofferdam and changes of covering layer made by channel scour to the seepage characteristics by using ABAQUS software. Project analysis shows that for a deep overburden watercourse on a complex condition,during the cofferdam construction organization,the coating thickness of cofferdam＇s base and its material properties parameters will be changed,the cover layer＇s seepage characteristics vary with its thickness and material properties. Seepage pressure characteristic values show an increasing trend,which matches the actual situation.
出处
《人民黄河》
CAS
北大核心
2014年第8期127-129,共3页
Yellow River
基金
湖北省教育厅科学技术研究项目(Q20131306)
三峡大学人才科研启动基金资助项目(KJ2012B008)
