SupportandReinforcementofaFoundationPitofJinshaRoadinNanshaZhangZhaohui(GuangdongEliteArchitecturalCo.,Ltd.Foshan528312,China)Abstract:BasedonthefoundationpitprojectdesignanditsreinforcementinNansha,theprojectaboutthecompositesoilnailwallsforretainingandprotectingthegraniteresiduallayerhasbeendescribed.Thecausesoflargedeformationduringtheconstructionofthefounda-tionpithasbeenanalyzed,andtheprojectreinforcementhasbeenproposed.Themonitoringresultsshowthattheanalysisofcausesfortheaccidentiscorrect,andthereinforcementschemeisfeasible.Keywords:foundationpitsupport;graniteresiduallayer;compositesoilnailingwall;deepdisplacement;reinforcementGUANGDONGARCHITECTURECIVILENGINEERING201311JAN2013No.11,1,,,。710m,15600m2,±0.0012.0m,-0.50m,-5.85m,5.35m,1。,,,,,。22.1,(Qml)(g),:〈1〉:,,,,,,0.7~4.6m;〈2-1〉:~,、,,,,0.5~2.8m;〈2-2〉:,,,,0.8~24.6m;〈2-3〉:,,,,,0.8~9.4m;〈2-4〉:,,,,,,1.3~15.5m;〈2-5〉:,,,,1.4~9.0m;〈2-6〉:,,,张朝辉(广东博意建筑设计院有限公司广东佛山528312):以南沙金沙路项目基坑工程设计及加固处理为背景,介绍了花岗岩残积层地区采用复合土钉墙支护的工程实例;针对基坑施工中局部区域产生的较大变形,分析其原因并提出加固方案,监测结果表明事故的原因分析正确,加固方案可行。:基坑支护;花岗岩残积层;复合土钉墙;深层位移;加固f800@1000f800@10004-41191g(kNm3)c(kPa)j(°)qsk(kPa)〈1〉18.2101020〈2-1〉18.5251735〈2-2〉15.964.910〈2-3〉19.402325〈2-4〉19.526.417.640〈2-5〉19.68512〈2-6〉2002528〈2-7〉20.52827.645〈3〉21252060〈4-1〉22402880:JAN2013No.1201311,,,0.8~8.0m;〈2-7〉:,、,,,,1.3~6.2m;〈3〉:~,、,,,,1.4~8.9m;〈4-1〉:,,,,,,1.5~8.3m;〈4-2〉:,,、、,,,,,,3.0~23.7m;〈4-3〉:,,、、,,、,,,,0.5~4.4m;〈4-4〉:,,、、,,,,,,0.5~6.3m。2。2.2,,,。,,;,,,-4.9m~-7.1m,-5.8m~-7.2m。,。33.1①,,,,;②,;③;④,-1.0m,1.0m。3.2⑴,1。⑵,,,,,。⑶,1.5m,,[1-3]。:①,f150,f114×3,0.5,1.3m,9m;②,f150,3×7f5,M30;③f8@200×200,C20100。(4-4)3,,,1.382,。3.3,(),,[6-7],20.55〈4-1〉〈2-1〉〈2-2〉〈3〉〈4-2〉〈4-3〉〈4-4〉〈2-3〉〈4-1〉0.451.000.459630-6-9-12-15-18-21-24-27-30-33-30.707.5013.0017.5032.0033.2036.301.209.5012.5032.0035.0040.1032.5029.5020.8017.2010.609.600.8038.5035.0032.0016.8012.309.502.001.00(m)5.68ZK976.71ZK985.56ZK965.64ZK95〈4-2〉〈4-3〉〈4-4〉〈2-2〉203f48300×3008.10300100040008#@200×200,5cm300×3006.502.25()50004000100030035°15°1500500f600@40010003000585010041501600375010006005003×7f5@2m,L=30m,5.0m,F=140kN,F2=200kN(L=12m)L=1500@1500f600@500JAN2013No.1201311。⑴:、、()、。⑵:2d,3d,。⑶:≤50mm;≤40mm;2m,0.5m。498d,,8~13m,2~3m,3.5~4.0cm,,。,,。,,,0.3m,,。,,0.1m,12~18m。128d,5.5cm,,,,,。,,。,。5,。2,f48@1000,L=18m,F=100kN(),()。,,2,,,。2,1,。,5.8cm,5.8cm,,,,。66.1,,,(),。。(),。6.2,,,。,,,。[1],.[M].:,1997[2],,.[M].:,2003[3],.()[M].:,2000[4],,.[J].,2005(2)[5]GB50497-2009[S]21