超大深基坑支护结构设计及数值模拟分析.pdfVIP

2025年4期江西建材岩土工程与勘察

超大深基坑支护结构设计及数值模拟分析

张朋

中国建筑技术集团有限公司，北京100013

摘要：为研究超大基坑支护结构设计的可靠性，文中以某超大深基坑工程为例，通过CEO5软件对基坑进行数值模拟分析，并与现

场监测数据进行对比。结果显示，基坑开挖后，土体最大水平位移最初集中在桩顶，随着开挖加深和预应力锚索技术的应用，位移最

大值逐渐转移到桩身1/2处；随着基坑开挖的深入，内部土体出现隆起现象，而受排桩加固的紧邻土体隆起较小，在基坑周边开始出

现沉降，且随着开挖深度的增加，桩体沉降量逐渐增加；基坑开挖过程中，桩体周边土体的水平和竖直应力逐渐降低，而基坑侧壁土体

的应力分布变化不大，表现出稳定性。

关键词：支护结构；数值模拟；锚索技术；现场监测

中图分类号：TU74文献标识码：B

DesignandNumericalSimulationAnalysisofExtra-largeDeepFoundation

PitSupportingStructure

ZhangPeng

ChinaBuildingTechniqueGroupCo.Ltd.,Beijing100013

Abstract:Inordertostudythereliabilityofsupportstructuredesignofsuper-largefoundationpit,thispapertakesasuper-largedeepfounda-

tionpitprojectasanexample,andusesGEO5softwaretoconductnumericalsimulationanalysisoffoundationpit,andcomparesitwiththe

fieldmonitoringdata.Theresultsshowthatafterexcavation,themaximumhorizontaldisplacementofsoilinitiallyconcentratedonthepiletop,

withthedeepeningofexcavationandtheapplicationofprestressedanchorcabletechnology,themaximumdisplacementgraduallytransferredto

1/2ofthepilebody.Withthedepthoffoundationpitexcavation,theinternalsoiluplifts,whiletheadjacentsoilstrengthenedbypilerowhas

asmallupliftandbeginstosettlearoundthefoundationpit,andthepilesettlementgraduallyincreaseswiththeincreaseofexcavationdepth.

Duringtheexcavationoffoundationpit,thehorizontalandverticalstressofthesoilaroundthepiledecreasesgradually,whilethestressdistri-

butionofthesoilonthesidewalloffoundationpitchangeslittle,showingstability.

Keywords:Supportingstructure;Numericalsimulation;C