不同降雨强度下渣土受纳场边坡地下水渗流和稳定性的数值模拟分析
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摘要
城市建设活动中产生的以弃土、弃料为主的建筑渣土的大量堆积容易形成稳定性极差的渣土边坡,而降雨条件的影响使得渣土边坡更不稳定,可能产生极大的潜在危害。选取某渣土受纳场边坡为研究对象,利用GEOSTUDIO数值模拟软件中的SLOPE/W和SEEP/W分析模块,通过设计5种不同降雨强度工况,对不同降雨强度条件下渣土边坡地下水渗流和稳定性进行了数值模拟计算与分析。结果表明:渣土边坡坡体内的地下水主要从下部渗透率较大的强风化岩层中流出;随着降雨强度的增大,坡体内相应位置处的总水头和孔隙水压力逐渐升高,并且地下水水位线也逐渐升高,而渣土边坡的稳定性逐渐降低。
In the urban construction activities,a large amount of construction waste which is mainly made up of abandoned soil and abandoned material is easy to form a sediment slope with poor stability.In addition,the rainfall has a negative influence on the stability of sediment soil slope,which may cause great potential harm.with GEO-STUDIO software,this paper analyzes a characteristic slope of construction sediment receiving field to study the groundwater seepage and stability characteristics under rainfall conditions.The paper designs five different intensities of rainfall cases and obtains the seepage contour and stability results of construction sediment slope.The numerical simulation results show that the groundwater flows out from the weathered rock strata.As the rainfall intensity increases,the total head and pore water pressure in the same position of slope increases gradually,and the groundwater level in the slope also rises,however,the stability coefficient of sediment soil slope decreases gradually.
In the urban construction activities,a large amount of construction waste which is mainly made up of abandoned soil and abandoned material is easy to form a sediment slope with poor stability.In addition,the rainfall has a negative influence on the stability of sediment soil slope,which may cause great potential harm.with GEO-STUDIO software,this paper analyzes a characteristic slope of construction sediment receiving field to study the groundwater seepage and stability characteristics under rainfall conditions.The paper designs five different intensities of rainfall cases and obtains the seepage contour and stability results of construction sediment slope.The numerical simulation results show that the groundwater flows out from the weathered rock strata.As the rainfall intensity increases,the total head and pore water pressure in the same position of slope increases gradually,and the groundwater level in the slope also rises,however,the stability coefficient of sediment soil slope decreases gradually.
引文
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[14]李新卫,晏鄂川,李辉.暴雨作用下铜仁地区典型滑坡变形机理研究[J].人民长江,2016,47(7):44-49.
[15]赵勇,刘之葵,王晓华.降雨条件下浅层滑坡渗流模拟与稳定性探讨[J].人民长江,2016,47(18):44-49.
[2]孙广忠.中国典型滑坡[M].北京:科学出版社,1988.
[3]郑明新,王全才.降雨滑坡的时空预测新方法[J].中国地质灾害与防治学报,1997(3):45-49.
[4]钟荫乾.滑坡与降雨关系及其预报[J].中国地质灾害与防治学报,1998(4):81-86.
[5]柳源.中国地质灾害(以崩、滑、流为主)危险性分析与区划[J].中国地质灾害与防治学报,2003,14(1):95-99.
[6]李峰,郭院成.降雨入渗对边坡稳定性作用机理分析[J].人民黄河,2007,29(6):44-45.
[7]李焕强,孙红月,孙新民,等.降雨入渗对边坡性状影响的模型实验研究[J].岩土工程学报,2009,31(4):589-594.
[8]娄一青,曹良珍,王志军,等.降雨入渗对边坡稳定性影响分析[J].水力发电,2008,34(5):19-22.
[9]谭文辉,璩世杰,高丹青,等.降雨入渗对边坡稳定性的影响分析[J].武汉理工大学学报,2010(15):39-43.
[10]连志鹏,殷坤龙.三峡库区巴阳移民新村库岸稳定性分析与塌岸预测[J].安全与环境工程,2007,14(4):40-43.
[11]郭利娜,胡斌,胡启晨.基于Geo-Slope软件对青莲寺边坡的稳定性分析[J].安全与环境工程,2011,18(6):20-24.
[12]张国超,范付松,赵鑫.间歇性降雨对滑坡稳定性的影响[J].安全与环境工程,2011,18(4):1-6.
[13]雷迪.库岸边坡稳定性影响因素敏感性分析简[J].人民长江,2014(S2):95-97.
[14]李新卫,晏鄂川,李辉.暴雨作用下铜仁地区典型滑坡变形机理研究[J].人民长江,2016,47(7):44-49.
[15]赵勇,刘之葵,王晓华.降雨条件下浅层滑坡渗流模拟与稳定性探讨[J].人民长江,2016,47(18):44-49.