主动控制预制压入式沉井侧壁和刃脚邻近土体应力路径演化与变形响应特征

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中图分类号：F301.24;P901 文献标志码：A 文章编号：2095-1329（2026）01-0019-06

Stress path evolution and deformation response of soils surrounding side wall and blade foot of active control press-in prefabricated shaft

JI Maojie，WANG Jianxiu，LONG Yanxia，WU Weifeng，SUN Yuanwei ZHANG Yuanhan，PAN Weiqiang，LI Hao，GUO Yan， ZHU Ling （1.ShanghaihntongetroCo，td.anghai，ina;2.ongjiUiversityanghi; 3.Shanghai Tunnel EngineeringandRail TransitDesignandResearch Institute，Shanghai 200235; 4.ShanghaiTunnel EngineeringConstruction Co.，Ltd.，Shanghai 20oo32，China）

Abstract：Undertheconstructionofanactivecontrol press-inprefabricatedshaft （ACPP），theevolutionofstresspathsandthe mechanisms goveringthedeformationresponseof thesuroundingsoilsremaininsuffcientlyunderstood.Toclarifytheunderlying behaviorandsupport stabilityassessmentandsafetycontrol duringshaftsinking，thisstudyisbasedontheACPPemergencyhaftof BeiqingRoadStationonShanghaiMetroLine13andadoptsanintegratedapproachcombiningnumericalsimulationandlaboratory stres-pathtesting.TheentiresinkingprocesswassmulatedusingABAQUS，fromwhchrepresentativestresspathsofsoilelemetsat diferenteptsjacnttothdewallandteuigedgeextractedndtmappdaslodingstorsfore-pattraial tests to investigatesoilmechanicalresponsesunderdiferentstresspathsResultsiicatethatunderACPonditions，thestrspaths ofsoilsalongtheshaftsideexhibitpronouncedstratifcation：theshallowzoneisdominatedbystressreleaseinducedbyecavation unloading;themiddlezonedevelopsatypicalunloadingreloadingcyclicpathwiththemostsignfcantstressredistribution;andthe deepzonenearthecutingedgeshowsstepwiseeloadingrecoveryofonfingpressureafterprogressvenloadig，whileaialstres eitheraccumulatescontinuouslyorundergoes minoradjustments.Thetests furthershowthatthemidlesoftclayexperiences more pronouncedradialreboundduringunloading，uggestingapotentiallsnsitiveinteralforfuctuations insinkingrateanddiertial setlement.Tesefdingsprovideareferenceformchanicalanalsis，onstructionpacingoptimization，adsfetycontrofCPP shaft sinking.

Keywords：actieoolprsipreabcaedsaft;soilssoingidewalladbladefoot;umcalsiulatn;sthtet

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