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平行矩形顶管施工对地表沉降的影响分析

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在平行矩形顶管的设计施工中,施工导致的地表沉降是非常重要的考虑因素.为探究平行矩形顶管之间的相互位置对地表沉降的影响,通过数值模拟的方法,对不同施工参数下的平行矩形顶管施工过程进行对比研究,获得施工引起的地表沉降曲线的变化规律.研究表明,当两矩形顶管间距与管径的比值较小时,先行管对后行管的影响明显,两平行顶管中间位置的地表沉降较大,随着比值的增加,中间位置地表沉降从36.6 mm下降到24.9 mm,地表沉降曲线从"U"形转变为"W"形;埋深与管径的比值较小时,地表沉降值最大,但顶管间的相互影响不明显,地表沉降曲线总体呈现"W"形,随着埋深增加,地表沉降值从41.1 mm下降到36.6 mm,此时沉降曲线过渡为"U"形,顶管之间的影响集中在中间区域,该区域地表沉降随各参数变化幅度较小.
Analysis of the Effect of Parallel Rectangular Pipe Jacking Construction on Surface Settlement
In the design and construction of parallel rectangular pipe jacking,the surface settlement caused by construction is a very important consideration.In order to investigate the influence of the mutual position between parallel rectangular jacking pipes on the surface settlement,a comparative study on the construction process of parallel rectangular jacking pipes under different construction parameters is carried out through numerical simulation to obtain the change rule of the construction-induced surface settlement curve.The study shows that when the ratio of two rectangular jacking pipe spacing to pipe diameter is small,the influence of the first pipe on the later pipe is obvious,and the surface settlement in the middle of the two parallel jacking pipes is larger,and with the increase of the ratio,the surface settlement in the middle position decreases from 36.6 mm to 24.9 mm,and the surface settlement curve is transformed from the"U"shape to the"W"shape;when the ratio of burial depth to pipe diameter is small,the surface settlement value is the largest,but the mutual influence between the top pipes is not obvious,and the surface settlement curve shows"W"shaped in general.As the burial depth increases,the surface settlement value decreases from 41.1 mm to 36.6 mm,at which point the settlement curve transitions into a"U"shape.The influence between the pipe jacking sections is concentrated in the central area,where the surface settlement varies little with changes in various parameters.

rectangular pipe jackingparallel pipe jackingsurface settlementfinite elementsABAQUS

张纬韬、曹广勇、葛安星、胡聪

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安徽建筑大学土木工程学院,合肥 230601

安徽建筑大学建筑结构与地下工程安徽省重点实验室,合肥 230601

中铁四局集团上海工程有限公司,上海 200070

矩形顶管 平行顶管 地表沉降 有限元分析 ABAQUS

2024

四川轻化工大学学报(自然科学版)
四川理工学院

四川轻化工大学学报(自然科学版)

影响因子:0.44
ISSN:2096-7543
年,卷(期):2024.37(6)