欢迎来到天天文库
浏览记录
ID:32413273
大小:1.63 MB
页数:5页
时间:2019-02-04
《营口软土地区桩网复合地基沉降规律研究》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、第35卷第5期世界科技研究与发展Vol.35No.52013年10月573-577页WORLDSCITECHR&DOct.2013pp.573-577营口软土地区桩网复合地基沉降规律研究刘浜葭张玲(辽宁工程技术大学建筑与工程学院,阜新123000)摘要:为研究滨海软土地区高铁地基的沉降问题,以哈大高铁营口东站附近软土地基处理工程为研究对象,对路基填筑过程和工后长期地基沉降进行观测。利用有限元数值分析软件ADINA建立相应的数值计算模型,研究了地基表面沉降规律。研究表明:地基沉降主要发生在路基填筑施
2、工期内,填筑期的沉降量占总沉降量的70%以上;路基填筑施工过程中,地基沉降曲线呈倒钟形,刺入现象明显,在CFG桩周沉降曲线呈“∩”形。基于现场实测数据,建立了工后长期地基沉降预测模型。对比分析结果表明,路基填筑完工三个月后(大约100d)预测公式精度较高,最终预测沉降量与观测值误差在021%~056%之间,可以满足工后长期沉降预测要求。上述研究成果将为处理滨海地区高速软土路基工程,预测和控制工后沉降提供了合理的依据。关键词:滨海地区;软土路基;桩网复合地基;沉降;数值模拟中图分类号:TU472文献标
3、识码:Adoi:10.3969/j.issn.1006-6055.2013.05.003ResearchonSettlementLawofPilenetCompositeFoundationofHighspeedRailwayinSoftSoilareainYingkouCityLIUBangjiaZHANGLing(CollegeofArchitectureandEngineering,LiaoningTechnicalUniversity,Fuxin123000)Abstract:Inord
4、ertoresearchthefoundationssettlement,thesoftsoilsfoundationtreatmentprojectinYingkoudongstationofHaDahighspeedrailwaywastakenastheresearchobjects.Thefoundationssettlementhasbeencontinuouslyobservedduringthefillingandpostconstruction.Thecalculationmo
5、delofthefoundationhasbeenestablishedbyADINAsoftwareandthesettlementlawofpilenetcompositefoundationwasresearched.Theresearchresultsshowthatthefoundationssettlementmainlyoccursintheembankmentfillingconstructionperiod.Thefoundationssettlementinfillingcon
6、structionperiodaccountsforabove70percentofthetotalsettlement.Thesettlementcurvesshowasinvertedbellshapedduringthefillingconstructionandhasanobviouspiercephenomenon.Thesettlementcurvesaroundthecementflyashgravepilesshowas‘∩’shape.Thesettlementspredictio
7、nempiricalformulaofthefoundationsgroundhasbeenestablishedbasingonthefieldmonitoringresults.Thecomparisonbetweentheresultsshowsthatpredictorformulahashighprecisionaftertheembankmentfillingconstructionaboutthreemonthor100days.Theerrorisbetween0.21%~0.56%b
8、etweenthefinalpredictvaluesandobservedvalues.Itspredictionprecisioncanmeetengineeringneed.Theaboveresearchachievementswillprovidearationalsuggestiononthefoundationssettlementpredictionandpostconstructioncontrolen
此文档下载收益归作者所有