摘要
在台风、风暴潮等海况中的强风浪作用下,土质海堤常发生破坏甚至决堤。考虑海堤土体在高水位波浪作用时发生液化的情况,用Geo-slope软件计算海堤整体滑动稳定性的安全系数,并与高水位静水状态、无波浪作用低水位时和波浪作用液化后低水位时3个工况计算的海堤安全系数进行比较分析。4个工况计算的安全系数分别为2.226、2.392、2.082和2.056。结果表明,波浪作用造成土体液化时,对海堤整体稳定性的影响并不明显,而临海侧低水位时对海堤整体稳定性的影响则很显著;强风浪情况下海堤的决口等破坏并不是由于波浪作用造成土体强度降低引起海堤整体滑动所导致的,具体机制仍需进一步研究。
Under the action of strong wind wave in the sea conditions of typhoon, storm surge and so on, soil seawall is often damaged or even broken. Considering the situation that the soil mass of seawall will be liquefied under the action of high water-level wave, Geo-slope software was used to calculate the safety factor for the overall sliding stability of seawall. The calculation result was compared with the safety factors calculated in other three conditions including high water level at calm water state, low water level with wave action, and low water level after liquefaction under wave action.The safety factors calculated in the four cases were 2. 226, 2. 392, 2. 082 and 2. 056 respectively.The results show that when the wave action is causing soil liquefaction, it doesn＇t produce a significant influence on the overall stability of seawall, but it produces a significant influence on the stability of seawall which is at the low level of sea side; the destructions such as seawall breach under strong wind wave are not caused by the overall seawall sliding due to reduction of soil strength under wave action, and it＇ s specific mechanisms still need further study.
出处
《水运工程》
北大核心
2016年第7期128-133,共6页
Port & Waterway Engineering
基金
山东省地勘基金项目(鲁勘字(2013)055)
