| Stability of the Guiding Dike in Yangtze Estuary Under the Wave Load |
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| 作者姓名： | 闫澍旺 刘润 范期锦 谢世楞 |
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| 作者单位： | [1]School of Civil Engineering, Tianjin University, Tianjin 300072, China [2]Yangtze Estuary Watenvay Construction Co. Ltd., Shanghai 200003, China [3]The First Waterway Design Institute, Tianjin 300222, China |
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| 基金项目： | This work was supported by the Research and Development Project of the Ministry of Communications of China （Grant No. 2003329C01010） |
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| 摘 要： | 1 .IntroductionIt has beenrealizedthat constructing gravitystructures onsoft soil foundations is a difficult task,especiallyinthe marine area where boththe geological and environmental conditions are severe .Thisisnot only because the bearing capacity of the soft foundation is relatively low, but also because thestrength of the soft soil will befurther weakened bythe waveloading (Andersenet al .,1988 ;Ander-sen and Lauritzsen,1988 ; Yasuhara ,1988) .The strength weakening may cause serious d…
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| 关 键 词： | 软粘土 强度弱化 堤防 动力三轴实验 有限元分析 |
| 收稿时间： | 2005-09-10 |
| 修稿时间： | 2005-11-06 |
Stability of the Guiding Dike in Yangtze Estuary Under the Wave Load |
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| YAN Shu-wang , LIU Run , FAN Qi-jin , XIE Shi-leng.Stability of the Guiding Dike in Yangtze Estuary Under the Wave Load[J].China Ocean Engineering,2005,19(4):659-670. |
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| Authors: | YAN Shu-wang LIU Run FAN Qi-jin XIE Shi-leng |
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| Abstract: | During the construction of the guiding dike in the Yangtze Estuary, some of the caisson structures sank into the soil for 1 -5 m or slid about 20 m away from the original place when a strong storm attacked this area. Dynamic triaxial tests were carried out to simulate the behavior of foundation soils under wave loading. The test results show that the excessive settlement and lateral movement of the caissons are due to the weakening of the soft clay strength during the strong storm. The test results 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 combining vertical drains with surcharge loading was proposed to strengthen the foundation soil. On the improved soil foundation, the dike has been reconstructed and undergone several strong storms without any damage. A finite element approach has been developed for analyzing the settlement and stability of the dike under the action of strong storm. |
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| Keywords: | soft clay strength weakening dike dynamic triaxial test FE analysis |
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