淺埋雙側(cè)偏壓小凈距隧道圍巖壓力變化規(guī)律研究

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SUN Botao12，CHEN Jiazheng12，LI Zhong1，2，HAN Yang1，2

（1. School of Civil Engineering， Shijiazhuang Tiedao University， Shijiazhuang O50043， China； 2. The Ministry of Education Jointly Established the Key Laboratory of Road and Railway Engineering Safety and Security， Shijiazhuang O50O43，China）

Abstract：Inordertostudy the variationlawofsurrounding rock pressure inshallow burieddouble sidedbiassmall spacing tunnels underdiferent influencingfactors，taking Chaoyang Tunnelastheengineering background，usingFLAC3Dnumerical simulationsoftware，thevariationlawofsurroundingrockdisplacementfieldandplasticzoneinshalowburieddoublesidedbias small spacing tunnelsunder diferentsurface slopes，tunnelburial depths，and tunnelclearance wasanalyzed.Theresearch resultsshowthatwiththecontinuous increaseof surface slopeand tunnelburialdepth，thedisplacementandplasticzoneof surroundingrockcontinuetoincrease，whilewiththecontinuousincreaseoftunnelclearance，theverticaldisplacementof surroundingrock firstincreases，thendecreases，andfinallyincreases，andthehorzontaldisplacementcontinues toincrease. When theclear distanceof the tunnelissmall，the plasticarea aroundthetunnel islarger，andtheoppositeistrue when the clear distance is increased.

Keywords：bilateral bias；smallclear distance tunel；surface slope；burial depth；clear distance；analysis indicators

0 引言

在我國基礎(chǔ)建設(shè)投資不斷增大的前提下，國內(nèi)交通基礎(chǔ)設(shè)施建設(shè)規(guī)模和建設(shè)速度得到飛速發(fā)展，隧道工程建設(shè)數(shù)量日益增加[1-2]。（剩余6716字）