资源描述：
《有孔管桩群桩沉桩引起的超孔隙水压力模型试验分析.pdf》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、第34卷第3期公路交通科技Vol．34No．32017年3月JournalofHighwayandTransportationResearchandDevelopmentMar．2017doi:10．3969/j．issn．1002-0268．2017．03．007有孔管桩群桩沉桩引起的超孔隙水压力模型试验分析廖幼孙,雷金波,杨康,柳俊(南昌航空大学土木建筑学院,江西南昌330063)摘要:为了深入研究有孔管桩群桩沉桩引起的超孔隙水压力变化规律,基于室内模型试验,对无孔管桩群桩和3种布孔方式的有孔管桩群桩沉桩时引起的超孔隙水压力进行了监测,分析了沉桩顺序、布孔方式等因素对超孔隙水压力时空
2、消散的影响,获得了无孔管桩群桩和3种布孔方式的有孔管桩群桩沉桩时超孔隙水压力随时间、深度、径向距离和沉桩顺序的变化规律。通过对比分析可知,有孔管桩群桩沉桩产生的超孔隙水压力小于无孔管桩群桩,表明有孔管桩群桩在一定程度上能降低超孔隙水压力,其中星状布孔方式的有孔管桩群桩沉桩产生的超孔隙水压力峰值最小,消散速率最快,最有利于减小沉桩挤土效应,沉桩效应最佳。关键词:道路工程;超孔隙水压力;模型试验;有孔管桩;群桩;挤土效应中图分类号:TU473文献标识码:A文章编号:1002-0268(2017)03-0045-07ModelExperimentalAnalysisonExcessPoreWa
3、terPressureduetoSinkingofPipe-pileGroupwithHolesLIAOYou-sun,LEIJin-bo,YANGKang,LIUJun(SchoolofCivilEngineeringandArchitecture,NanchangHangkongUniversity,NanchangJiangxi330063,China)Abstract:Forthesakeofresearchingthechangelawofexcessporewaterpressureduringsinkingofpipe-pilegroupwithholes,basedoni
4、ndoormodeltest,theexcessporewaterpressuresofpipe-pilewithoutholeand3kindsofpipe-pilegroupwithholescausedbypilesinkingaremonitored.Theinfluencesofpile-sinkingsequenceandhole-disposalmodeonthetime-spacedissipationofexcessporewaterpressureareanalyzed.Thevariationrulesoftheexcessporewaterpressureofpi
5、pe-pilewithoutholeand3kindsofpipe-pilegroupwithholesdissipationwithtime,depth,radialdistanceandpile-sinkingsequenceduringtheprocessofpile-sinkingareobtained.Throughthecomparisonandanalysis,itisfoundthattheexcessporewaterpressureofpipe-pilegroupwithholesislessthanthatofthepile-pilegroupwithouthole
6、,indicatingthatthepipe-pilegroupwithholescanreduceexcessporewaterpressureinsomedegree,amongwhichthepipe-pilegrouppenetratedinaradialwayhastheleastpeakofexcessporewaterpressure,andthedissipationrateisthefastest,whichisthemostfavorableforreducingthesqueezingeffectofthesinkingpiles,andpilesinkingeff
7、ectisthebest.Keywords:roadengineering;excessporewaterpressure;modeltest;pipe-pilewithhole;pilegroup;soil-compactingeffect收稿日期:2016-04-08基金项目:国家自然科学基金项目(51268048);江西省教育厅科研基金项目(GJJ14527)作者简介:廖幼孙(1990-),男,江西崇仁人,硕士．(919612
