CHINESEKARSTGEOLOGYANDMEASURESTOPREVENTGEOHAZARDSDURINGSHIELDTUNNELLINGANDDEEPEXCAVATIONINKARSTREGIONWITHCAVERNS
CHINESEKARSTGEOLOGYANDMEASURESTOPREVENTGEOHAZARDSDURINGSHIELDTUNNELLINGANDDEEPEXCAVATIONINKARSTREGIONWITHCAVERNS.pdf
KarstlandscapesarewidelydistributedanddifferentcharacteristicsaredisplayedindifferentregionsduetotheeffectofvariousnaturalenvironmentalfactorswhichoccurthroughoutChina.Buriedkarstcavernsystemscoveredbysandystrata,whicharewidelydistributedinGuangdongProvince,possessthefollowingfeatures:highfissurewatercontent,highrockpermeability,susceptibilitytocollapse,variabilityinshapeandanirregulardistribution.Whenashieldtunnelisconstructedinthiskindofenvironment,hazards,suchassinkholes,theingressofwaterorstones,anddamagetotheconstructedtunnelsmayoccur.Thus;karstcavesneedtobetreatedbeforetunnelconstruction.Socketdiaphragmwallsareusuallyadoptedtoretainsoilandtocut-offgroundwaterduringdeepexcavationsinGuangdongprovince,forthesafetyoftheexcavationandtoreducetheimpactonthesurroundings.However,geohazardsoftenoccurduringtheconstructionofdiaphragmwallsinkarstregions,causingproblemssuchasdiaphragmwallcollapse,waterormudingress,groundcollapseandlong-terminstability.Thispaperpresentsaprocedureforkarstcavetreatmenttomitigatepossiblehazardsduringshieldtunnellinginkarstregions.Theconstructionprocedureincludesfieldinvestigations,judgment,treatment,andeffectivenesschecks.
作者：CUIQinglongSHENShuilongXuYeshuangWUHuainaWU,Yongxia
作者单位：StateKeyLaboratoryofOceanEngineering,DepartmentofCivilEngineering,ShanghaiJiaoTongUniversity,Shanghai200240,China
母体文献：第八届中日盾构隧道技术交流会论文集
会议名称：第八届中日盾构隧道技术交流会
会议时间：2015年9月9日
会议地点：南京
主办单位：中国土木工程学会,中国岩石力学与工程学会,中国公路学会
语种：chi
分类号：
关键词：karstcaverntunnellingdiaphragmwalldeepexcavationkarstcaverntreatmenthazards
在线出版日期：2018年11月22日
基金项目：
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