广州港出海航道试挖槽边坡稳定性分析

Slope stability analysis for trial dredged channel in seaward channel of Guangzhou Harbor

基于广州港出海航道2008年1月、4月及9月3次航道测量的地形资料,结合相关的水文资料,从边坡稳定性角度分析了试挖槽的回淤情况。通过对比得出了伶仃航段（KP17~KP60）航道东、西两侧边坡坡比的总体变化。结果表明,2008年1月坡比分别为1∶11.1和1∶11.7,4月分别为1∶8.6和1∶8.5,9月分别为1∶8.8和1∶8.4。1月到4月平均坡比变化较大,4月到9月平均坡比变化较小,坡比基本稳定在1∶8.5左右。

Based on the topographical survey data from the seaward channel of Guangzhou Harbor during January,April and September in 2008,the phenomenon of sedimentation in trial dredged channel was analyzed from the perspective of slope stability with the related hydrological data.The general variation of slope ratio in both east and west of the Lingding channe（lKP17~KP60）was obtained by means of the comparison of the survey data.The results show that the slope ratio in January 2008 are 1∶11.1 and 1∶11.7 respectively,in April are 1∶8.6 and 1∶8.5 respectively,and in September are 1∶8.8 and 1∶8.4 respectively.The change of average slope ratio from January to April is bigger,while the change from April to September is smaller.The slope ratio is basically stable at about 1∶8.5.