摘要
兴建河口海湾水库是国内外解决水资源不足的一项重要措施,其对水资源的充分利用具有极其重要的意义。本文依托沐官岛海湾水库工程,考虑海洋水文和地质条件因素,采用有限元分析软件ABAQUS建立了大型三维渗流和稳定性仿真有限元模型,开展多种潮位工况下拦海坝的孔隙水压、渗流速度和竖向沉降仿真计算,对沐官岛拦海坝渗流与稳定性进行分析。分析得出,在20年一遇潮位下,拦海坝的防渗性能良好,对海水与淡水起到阻隔作用。在50年、100年一遇潮位时,防渗墙内部产生渗流速度,这是由于水压差过大、渗流强度增加而产生的结果。拦海坝的不均匀沉降控制较好,不会发生坝体尤其是心墙的开裂。提出防渗墙加固措施,为坝基渗流预防、稳定性设计以及后续拦海坝建设与使用的安全性保证提供参考依据。
The construction of the bay reservoir at the estuary of river is an important measure to solve the shortage of water resources at home and abroad,which is of great significance to the full utilization of water resources.Based on Muguandao bay reservoir project,considering marine hydrological factors and geological conditions,this paper established a large-scale three-dimensional seepage and stability simulation finite element model by using the finite element analysis software ABAQUS.The simulation calculation of pore water pressure,seepage velocity and vertical settlement of the sea retaining dam under various tide level conditions were carried out,and the seepage and stability of Muguandao sea retaining dam were analyzed.The analysis showed that under the tide level with a return period of 20 years,the anti-seepage performance of the sea blocking dam was good,and it played a role in blocking seawater and fresh water.When the tide level occurred once every 50 or 100 years,the seepage velocity occurred in the impervious wall,which was the result of the excessive water pressure difference and the increase of seepage intensity.The uneven settlement of the sea retaining dam was well controlled,and the cracking of the dam body,especially the core wall,would not occur.The reinforcement measures of cut-off wall were put forward to provide reference basis for seepage prevention of dam foundation,stability design and safety guarantee of subsequent construction and use of sea retaining dam.
作者
曹同钢
朱成浩
刘红军
王志朋
CAO Tonggang;ZHU Chenghao;LIU Hongjun;WANG Zhipeng(College of Environmental Science and Engineering,Ocean University of China,Qingdao 266100,China;Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering,Qingdao 266100,China)
出处
《海洋湖沼通报》
CSCD
北大核心
2023年第5期53-60,共8页
Transactions of Oceanology and Limnology
基金
国家自然科学基金项目(41572247)
中央高校基本科研业务费专项(202061027,202261063)。
关键词
海湾水库
渗流
稳定性
数值模拟
拦海坝
ocean reservoir
seepage
stability
numerical simulation
sea retaining dam
