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浙江建筑,第27卷,第2期,2010年2月ZhejiangConstruction,Vo.l27,No.2,Feb.2010:2009-10-13:(1971-),,,,1TheGeologicalConditionandtheMainGeotechnicalProblemsoftheHangzhouNo.1Subway王松平1,陈勇华2WANGSongping,CHENYonghua(1.,310030;2.,510010):,1,20m,23~28m18,,,1,:;;;:U231+.3:B:1008-3707(2010)02-0012-041147.9km,,,,,829(29m)29,122.1地貌单元及土层性能1,,:~~20~30m:~,,;,1,,,!:~,,,∀11,2.2水文地质条件:,:,#1~#7,,0.5m2∃2%2,6.0~10.85m,-3.23~1.63m,111&,alQ34#1~#7,qc=2~8MPa,~mQ24∀1,mQ141,2,,,allQ23∋,∃1,∃2,,(,almQ23%1,%2,qc6MPa,alQ131,,2,3,~,2~30cm33.1抛石沉船等地下障碍物,,,,,10~30cm,,,,,,,,15m,,,,3.2暗塘暗浜,,,,,,5m,,,13第2期:13.3浅层沼气,,,,,,,,,,,0.43MPa:+,,,-18~-22m,,,,,,,3.4河流的冲刷,16m,,122m,,,,,,3.5软土1,∀1∀212,,,,,,,,,,,,,,68%,,,13m,,,,,,,,5m,,,1)3~1)4,3.6承压水突涌,,,,;,,,,∗=25m∗16m,,4~8m,13m,3[1];23.6m,8m,,,,,,,,,,17m3.7砂土液化20m#1~#7,7,~,,,+16m,3.8流砂,10E04~10E-03cm/s,14201027,,,,,,,0.76,,,,,,,,3.9基坑挖土工况及对软土地层性能的影响,,,,,−[2],,,800mm,1)1.1,,,20~25m,,,49mm,50mm,,,,,m,3.10土性对盾构掘进时地面沉降的影响,,,(1cm3cm),(),,3.11盾构进出洞时坑外土体加固,,,,,,11#,,,,,,+,,,1#,,,,,,,,4(1),2,,,,,,,(2),,,,[1].[J].,2009,26(4):33-35.[2],,.[J].,1999(3):6-10.15第2期:1