加筋均质边坡稳定影响因素的敏感性研究
|
摘要
采用正交分析表设计单指标多因素试验,通过荷兰法和瑞典法计算加筋边坡的稳定安全系数。结合 20 m 高土工格栅加筋边坡算例,分析了各因素对加筋边坡稳定影响的敏感性,按其大小依次为:粘聚力、内摩檫角、地震作用、重度、筋层数、筋材抗拉强度、坡比、筋层间距、地面超载和地下水位。重点讨论了加筋对边坡稳定的影响,并认为在边坡工程中,如果条件许可应优先采用粘聚力高、内摩檫角大的填料,需要加筋时,在总加筋力相等的前提下,铺设多层强度适中的格栅比少量高强度格栅的加筋效果好。
Based on the factors of reinforced slope computed with Holland method and Sweden method, the tests of single index and multiple factors were designed according to orthogonality table in the paper. Associated with the example of slope with the height of 20 meters reinforced by geogrids, the sensibilities of the factors influencing on the stability of slope were analysed. In sequence, the sensibilities of factors are as follows in their magnitude order: cohesion, angle of internal friction, seism, unit weight, the reciprocation of number of geogrids layers and space between layers, number and tensile strength of geogrids, slope angle space between geogrids layers, overload in top of slope and underground water level. The discussion laid emphasis on the effects of reinforcement. If possible, backfill with high cohesion and big angle of internal friction should be adopt preferentially. When reinforcements are needed, under the condition of the same total tensile strength of reinforcement, it’s better to install more geogrids with moderate strength than less ones with high strength.
Based on the factors of reinforced slope computed with Holland method and Sweden method, the tests of single index and multiple factors were designed according to orthogonality table in the paper. Associated with the example of slope with the height of 20 meters reinforced by geogrids, the sensibilities of the factors influencing on the stability of slope were analysed. In sequence, the sensibilities of factors are as follows in their magnitude order: cohesion, angle of internal friction, seism, unit weight, the reciprocation of number of geogrids layers and space between layers, number and tensile strength of geogrids, slope angle space between geogrids layers, overload in top of slope and underground water level. The discussion laid emphasis on the effects of reinforcement. If possible, backfill with high cohesion and big angle of internal friction should be adopt preferentially. When reinforcements are needed, under the condition of the same total tensile strength of reinforcement, it’s better to install more geogrids with moderate strength than less ones with high strength.
引文
[1]张旭辉,龚晓南,徐日庆.边坡稳定影响因素敏感性的正交法计算分析[J].中国公路学报,2003,16(1):36-39.
[2]ToshiakiKatagiri,HiromiHaneda, et al. steep reinforced embankment using geogrids-laboratory pull-out test of geogrid and its finite element analysis[A].Proc of the4th international conference on geotextiles,geomembranes and related products[C].Netherlands:InternationalGeotexileCociety,1990,1:45-51.
[3]陈永辉,施建勇,马文斌.土工织物加筋堤坝复合有限元分析方法[J].水利学报,2003,3(1):28-33.
[4]吴贵生.试验设计与数据处理[M].北京:冶金工业出版社.1997,47-48,214-215.
[5]江见鲸,宋昆仑,傅德炫.土建工程实用计算程序选编[M].北京:地震出版社,1992.
[6]周志刚,郑健龙.公路土工合成材料设计原理及工程应用[M].北京:人民交通出版社,2001.
[7]徐少曼,洪昌华.考虑加筋垫层的堤坝下软基稳定分析法[J].土木工程学报,2000,33(4):88-92.
[8]刘惠珊,徐攸在.地基基础工程283问[M].北京:中国计划出版社,2002.
[9]赵川,周亦唐.土工格栅加筋碎石土大型三轴试验研究[J].岩土力学,2001,22(4):419-422.
[10]M Srbulov. analyses of stability of geogrid reinforced steep slopes and retaining walls[J].Computers andGeotechnics,2001,28(3):255-268.
[11]张建国.土工织物对地基的加筋效果[A].岩土力学与工程[C].大连:大连理工大学出版社,1995,641-645.
[12]李广信,陈轮,蔡飞.加筋土体应力变形计算的新途径[J].岩土工程学报,1994,16(3):46-53.
[13]钟国强,周亦唐等.用有限元强度折减法求加筋土挡墙的稳定安全系数[J].昆明理工大学学报(理工版),2003,28(1):123-126.
[2]ToshiakiKatagiri,HiromiHaneda, et al. steep reinforced embankment using geogrids-laboratory pull-out test of geogrid and its finite element analysis[A].Proc of the4th international conference on geotextiles,geomembranes and related products[C].Netherlands:InternationalGeotexileCociety,1990,1:45-51.
[3]陈永辉,施建勇,马文斌.土工织物加筋堤坝复合有限元分析方法[J].水利学报,2003,3(1):28-33.
[4]吴贵生.试验设计与数据处理[M].北京:冶金工业出版社.1997,47-48,214-215.
[5]江见鲸,宋昆仑,傅德炫.土建工程实用计算程序选编[M].北京:地震出版社,1992.
[6]周志刚,郑健龙.公路土工合成材料设计原理及工程应用[M].北京:人民交通出版社,2001.
[7]徐少曼,洪昌华.考虑加筋垫层的堤坝下软基稳定分析法[J].土木工程学报,2000,33(4):88-92.
[8]刘惠珊,徐攸在.地基基础工程283问[M].北京:中国计划出版社,2002.
[9]赵川,周亦唐.土工格栅加筋碎石土大型三轴试验研究[J].岩土力学,2001,22(4):419-422.
[10]M Srbulov. analyses of stability of geogrid reinforced steep slopes and retaining walls[J].Computers andGeotechnics,2001,28(3):255-268.
[11]张建国.土工织物对地基的加筋效果[A].岩土力学与工程[C].大连:大连理工大学出版社,1995,641-645.
[12]李广信,陈轮,蔡飞.加筋土体应力变形计算的新途径[J].岩土工程学报,1994,16(3):46-53.
[13]钟国强,周亦唐等.用有限元强度折减法求加筋土挡墙的稳定安全系数[J].昆明理工大学学报(理工版),2003,28(1):123-126.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心