三峡水库运行条件下兰陵溪场镇库岸边坡稳定性分析
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摘要
根据三峡库水位调控方案,在分析库水位变化与岸坡稳定性的一般规律的基础上,对兰陵溪场镇库岸边坡稳定性进行定性分析,并采用传递系数法计算四个剖面在不同工况条件下的稳定性系数。结果表明:蓄水时,各实测剖面的稳定性均下降,发生局部岸踏的可能性自北向南逐渐增大;汛期防洪库水位从高程175 m降为145 m时,稳定性最差,极有可能发生整体性塌岸事故。因此,只有在水位骤降这种极限状态下保持稳定,才能确保兰陵溪场镇库岸边坡的安全,这对边坡防治以及水库安全运营提供了科学依据。
According to the controlled method of the water level of the Sanxia Reservoir,the article is based on the common regulation between the water level variety and slope stability,qualitatively analyzes the slope stability beside the Lanlingxizhen reservoir and takes the passing coefficient to calculate the stability value of the four sections under the difficult construction conditions.The results shows that the stability of the real measured section is all dropped down while sluicing,the possibility of some part banks collapsed will be more from north to south.For the flood season,the water level of the flood reservoir is from 175m to 145m,its stability is the poorest while is more possible to result in whole bank collapsed.Therefore,if it can keep stable only when the water level drops rapidly,the side slope of the Lanlingxichangzhen reservoir will be safe,which provide scientific basis for side slope prevention and reservoir safe.
According to the controlled method of the water level of the Sanxia Reservoir,the article is based on the common regulation between the water level variety and slope stability,qualitatively analyzes the slope stability beside the Lanlingxizhen reservoir and takes the passing coefficient to calculate the stability value of the four sections under the difficult construction conditions.The results shows that the stability of the real measured section is all dropped down while sluicing,the possibility of some part banks collapsed will be more from north to south.For the flood season,the water level of the flood reservoir is from 175m to 145m,its stability is the poorest while is more possible to result in whole bank collapsed.Therefore,if it can keep stable only when the water level drops rapidly,the side slope of the Lanlingxichangzhen reservoir will be safe,which provide scientific basis for side slope prevention and reservoir safe.
引文
[1]朱冬林,任光明,聂德新,等.库水位变化下对水库滑坡稳定性影响的预测[J]水文地质工程地质.2002,3:6-9.
[2]张文杰,等.水位升降对库区非饱和土质岸坡稳定性的影响[J].浙江大学学报(工学版).2006,40(8):1035-1036
[3]黄润秋,张倬元,王士天.高边坡稳定性的系统工程地质研究[M].成都:成都科技大学出版社,1991.
[4]罗晓红,李进元.水库蓄水对库岸滑坡影响分析[j].水电设计,2003,19(3):61-64.
[5]朱冬林,任光明,聂德新,等.库水位变化下对水库滑坡稳定性影响的预测[J]..水文地质工程地质,2002,(3):6-9.
[6]杨绪波,黄润秋,曹运江.库水位变化下某泄洪洞进口高边坡的稳定性分析[J].地质灾害与环境保护,2005,16(3):307-309.
[7]王旭升,常宏,谭建民.斜坡地下水渗透力计算与稳定性分析[J].水文地质工程地质,2003,(2):41-45.
[2]张文杰,等.水位升降对库区非饱和土质岸坡稳定性的影响[J].浙江大学学报(工学版).2006,40(8):1035-1036
[3]黄润秋,张倬元,王士天.高边坡稳定性的系统工程地质研究[M].成都:成都科技大学出版社,1991.
[4]罗晓红,李进元.水库蓄水对库岸滑坡影响分析[j].水电设计,2003,19(3):61-64.
[5]朱冬林,任光明,聂德新,等.库水位变化下对水库滑坡稳定性影响的预测[J]..水文地质工程地质,2002,(3):6-9.
[6]杨绪波,黄润秋,曹运江.库水位变化下某泄洪洞进口高边坡的稳定性分析[J].地质灾害与环境保护,2005,16(3):307-309.
[7]王旭升,常宏,谭建民.斜坡地下水渗透力计算与稳定性分析[J].水文地质工程地质,2003,(2):41-45.
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