城市垃圾填埋体的动力特性及地震响应
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摘要
结合某垃圾填埋场工程 ,利用表面波频谱分析法 (SASW )测试垃圾填埋体的剪切波速 ,得到了用于静动力响应分析的填埋体参数。在假定地表降水入渗为填埋场垃圾土体唯一补给来源的前提下 ,提出了确定浸润线自由面的方法 ,通过静力和动力有限元计算 ,对某填埋场边坡进行了稳定分析。对最危险滑动面的位置分析后发现 ,在地震过程中 ,滑动面的位置比较集中。在此基础上 ,对Newmark方法进行了改进 ,采用圆弧滑动面 ,得到了填埋场在地震作用下的永久位移。实例分析表明 ,垃圾在填埋过程中的初始压实 ,对埋场的地震稳定具有重要意义。
A method to calculate the leachate curve of free?faced headline is proposed in the paper. It is assumed that the leachate of precipitation is the only water source into the municipal solid waste (MSW). According to the results of experiments on the MSW, the stability of a wasteland is analyzed by means of the static?dynamic finite element method. It is demonstrated that the positions of the most dangerous slide surfaces during earthquake are fairly concentrated. Based on the conclusion, the permanent displacement of a wasteland during earthquake can be obtained by means of Newmark method on the circular?arc slide surface. An example has shown that initial packing is of great importance on its stability.
A method to calculate the leachate curve of free?faced headline is proposed in the paper. It is assumed that the leachate of precipitation is the only water source into the municipal solid waste (MSW). According to the results of experiments on the MSW, the stability of a wasteland is analyzed by means of the static?dynamic finite element method. It is demonstrated that the positions of the most dangerous slide surfaces during earthquake are fairly concentrated. Based on the conclusion, the permanent displacement of a wasteland during earthquake can be obtained by means of Newmark method on the circular?arc slide surface. An example has shown that initial packing is of great importance on its stability.
引文
[1] 陈云敏,王立忠,胡亚元等.城市固体垃圾填埋场边坡稳定分析[J]土木工程学报,2000,33(3):92～97
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[3] 钱学德,郭志平城市固体废弃物(MSW )的工程性质[J]岩土工程学报,1998,20(5)1～6
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[12] Newmark,N ,M ..Effectsofearthquakesondamsandem bankments.Geotchnique,1965,15(2):139～160
[13] SeedH .B ..Considerationintheearthquakedesignofearthandrockfilldams.Geotchnique,1979,29(3):215～263
[14] MorochnikV .,BardetJ .P ..IdentificationofDynamicPropertiesofOIILandfill.J .Geotech.andGeonvin.En grg.,ASCE ,1998,124(3):186～196
[15] MatasovicN .,KavazanjianE ..CyclicCharacterizationofOIILandfillSolidWaste.J .Geotech.andGeonvin.Engrg.,ASCE ,1998,124(3):196～210
[16] BrayJ .D .,RathjeE .M ..EarthquakeInducedDisplacementsofSolidWasteLandfills.J .Geotech.andGeonvin.Engrg.,ASCE ,1998,124(3):242～253
[17] McEnroeB .M ..Maximumsaturateddepthoverlandfilllin er.J .Envir.Engrg.,ASCE ,1989,119(2):262～270
[18] 陈云敏,吴世明,曾国熙.表面波频谱分析法及其应用.岩土工程学报,1992,14(3):61～65
[2] 张振营,吴世明,陈云敏.城市生活垃圾土性参数的室内实验研究[J]岩土工程学报,2000,22(1):35～39
[3] 钱学德,郭志平城市固体废弃物(MSW )的工程性质[J]岩土工程学报,1998,20(5)1～6
[4] 温振统城市固体废弃物填埋场沉降与稳定分析[D]杭州:浙江大学土木系,1999
[5] MitchellK .,SeedR .B ,SeedH .B .Kettlemanhillswastelandfillslopefailure.I:Liner systemproperties.J .Geotech.Engrg.,ASCE ,1990,116(4):647～668
[6] SeedR .B .,MitchellJ .K .,SeedH .B .Kettlemanhillswastelandfillslopefailure.Ⅱ:StabilityAnalyses.J .Geotech.Engrg.,ASCE ,1990,116(4):689～690。
[7] BookterT .J .,HamR .K .Stabilizationforsolidwasteinlandfills.J .Envir.Engrg.,ASCE ,1982,108(6):1089～1100
[8] RoversF .A ,FarquharG .J ..Infiltrationandlandfillbehav ior.J .Envir.Engrg.Div.,ASCE ,1973.99(5):671～690
[9] SoydemirC ..SeismicdesignoflandfilsforNEunitedstates.Proceedings:Thirdinternationalconferenceonrecentadvancesingeotechnicalearthquakeengineeringandsoildynamics,St.Louis,Missouri,1995
[10] ChangTzyy shiou,WeiBao zhu,HallK .M .,ChangKuo ping.Earthquake inducedlateraldisplacementofalandfill,Proceedings:Thirdinternationalconferenceonrecentadvancesingeotechnicalearthquakeengineeringandsoildynamics.St.Louis,Missouri,1995
[11] AugelloA .J .,BrayJ .D .,AbrahamsonN .A .,SeedR .B ..Dynamicpropertiesofsolidwastebasedonback analysisofOIIlandfill.J .Geotech.andGeonvin.Engrg.,ASCE ,1998,124(3):211～222
[12] Newmark,N ,M ..Effectsofearthquakesondamsandem bankments.Geotchnique,1965,15(2):139～160
[13] SeedH .B ..Considerationintheearthquakedesignofearthandrockfilldams.Geotchnique,1979,29(3):215～263
[14] MorochnikV .,BardetJ .P ..IdentificationofDynamicPropertiesofOIILandfill.J .Geotech.andGeonvin.En grg.,ASCE ,1998,124(3):186～196
[15] MatasovicN .,KavazanjianE ..CyclicCharacterizationofOIILandfillSolidWaste.J .Geotech.andGeonvin.Engrg.,ASCE ,1998,124(3):196～210
[16] BrayJ .D .,RathjeE .M ..EarthquakeInducedDisplacementsofSolidWasteLandfills.J .Geotech.andGeonvin.Engrg.,ASCE ,1998,124(3):242～253
[17] McEnroeB .M ..Maximumsaturateddepthoverlandfilllin er.J .Envir.Engrg.,ASCE ,1989,119(2):262～270
[18] 陈云敏,吴世明,曾国熙.表面波频谱分析法及其应用.岩土工程学报,1992,14(3):61～65
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