浅埋双侧偏压小净距隧道围岩压力变化规律研究

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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

在我国基础建设投资不断增大的前提下，国内交通基础设施建设规模和建设速度得到飞速发展，隧道工程建设数量日益增加[1-2]。（剩余6716字）