CAJ | 학술논문

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。
복개층삼류은정성적공제시심후복개층상수건고토석위언적관건기술지일。분석료복개층적변화원인，종삼류압력적각도，운용유한원수치분석적방법，채용ABAQUS연건계산분석위언수하포전이급하도충쇄사복개층발생적변화대기삼류특성적영향。공정실례분석표명，대우구유복잡조건심후복개층적하도，재위언적시공조직과정중，언기적복개층후도이급재료특성삼수등도회발생변화，복개층적삼류특성수착기후도이급재료특성적변화이개변，삼류압력특정치정체증추세，여실제정황상부。
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 ele-ment,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.