摘要
长江口导堤在建造期间遭到了强风暴的袭击,致使一部分沉箱结构沉入土中1～5m,或偏移初始位置20m。通过动三轴试验模拟波浪荷载作用下地基的变化情况,试验结果显示,沉箱的过度沉陷和侧移是由于强风暴使得软黏土强度弱化所致。根据试验结果,提出排水板加堆载预压的方法来加固软土地基,并证明该方法的有效性。在加固的软土地基上对导堤进行重建,重建后经历几次强风暴该导堤无损坏迹象。
Under the attacking of a strong storm,during constructing the guiding dike in Yangtze Estuary,some of the caisson structures were sinking into the soil for 1–5 m or slide away about 20 m from the original place.Dynamic triaxial tests are carried out to simulate the behavior of foundation soils under wave loading.The results show that the excessive settlement and lateral movement of the caissons are due to the strength weakening of the soft clay during the strong storm,and also show that the ability of the soft clay to resist the wave force will be greatly increased when the soft soil samples are suitably improved.Based on the test results,an improvement method associating vertical drains with surcharge loading is proposed to strengthen the foundation soil.With the improved soil foundation,the dike was reconstructed and underwent several strong storms without any damage.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2006年第z1期3245-3249,共5页
Chinese Journal of Rock Mechanics and Engineering
关键词
土力学
软黏土
强度弱化
导堤
动三轴试验
soil mechanics
soft clay
strength weakening
guide dike
dynamic triaxial test
