摘要
由于浅水区波浪的非线性影响显著,浅埋管道受非线性波浪荷载的影响大,由于波浪的传播造成海床面波压力随周期变化,而波压力会进一步传递到海床中,管道周围的渗流压力会随波浪的传播发生变化,为了保证管道长期运行的稳定性,需要研究海底管道周围渗流压力的变化。基于Biot固结理论和一阶近似孤立波理论研究了非线性波浪作用下浅水区埋置管道周围的渗流压力分布,推导海床内管道周围的渗流压力解析解,并与已有的非线性波的试验结果及推进波的数值计算结果进行比较。计算结果表明,在孤立波的作用下,海底管道附近的渗流压力呈正弦分布,与试验结果一致。同时,根据不同波浪理论得出的渗流压力差别较大,工程计算中应根据海况条件合理地选择相应的波浪理论。
Due to the effect caused by nonlinear shallow waves, the nonlinear wave load has a great influence on the shallow buried pipelines. The wave pressure on seabed surface changes periodically with the propagation of waves, and it will further pass to the sea-bed, so the seepage force around pipelines will change over the propagation of waves. In order to ensure their stability, we need to study the seepage pressure around the pipelines. Based on the Biot consolidation theory and the first-order solitary wave theory, the distribution of seepage force caused by nonlinear waves around the buried pipelines in shallow water is studied, and the relevant analytic solution is derived and compared with the existing test and the numerical results. The calculated results show that the seepage force around the buried pipelines exhibits a sinusoidal distribution under the effect of solitary waves, and they agree well with the test ones. Since the seepage forces based on different wave theories have great differences, the corresponding wave theory should be chosen according to the sea conditions in practical engineering.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2015年第5期932-936,共5页
Chinese Journal of Geotechnical Engineering
