摘要
关于盾构隧道施工引起管线变形和土层沉降的影响,相对于传统圆形盾构,类矩形盾构施工的研究较为少见,具有一定的新颖性。针对类矩形盾构隧道施工对邻近地下管线及土体沉降的影响,采用室内缩尺寸模型试验,考虑正常管线,非连续管线,非连续破损管线以及4种不同深度处的土体沉降的因素,分析砂土地层中,在管隧垂直工况下,类矩形盾构隧道开挖对地下管线变形及土体沉降的影响。试验结果表明:几种形式的地下管线沉降变形规律一致,均关于隧道轴线对称,呈"V"型分布;非连续管线最大沉降小于连续管线,管线两端在隧道宽度范围外的沉降大于连续管线;非连续管线弯矩变化趋势比连续管线缓和,最大正负弯矩值均小于连续管线;非连续破损管线在管线两侧负向弯矩变化较大;深层土体沉降符合高斯分布,土体最大沉降随土层埋深增加呈正比关系增大。
Compared with the traditional circular shield,the research on the influence of shield tunnel construction on pipeline deformation and soil settlement is relatively rare and of certain novelty.For the influence of quasi-rectangular-type shield tunnel construction on adjacent underground pipelines and soil settlement,the indoor shrinkage model test is adopted,normal pipelines,non-continuous pipelines,discontinuous damaged pipelines and soil settlement factors under four different depths are considered.The deformation law of the deformation of the underground pipeline and the settlement of the soil in the sand-soil layer under the vertical conditions of the tunnel and the tunnel are analyzed.The test results show that the settlement and deformation laws of several types of underground pipelines are consistent,and the tunnel axis is symmetrical,and the distribution is V type.The maximum settlement of the discontinuous pipeline is smaller than that of the continuous pipeline,and the settlement of both ends of the pipeline outside the tunnel width is larger than that of the continuous pipeline.The change trend of bending moment of discontinuous pipelines is more relaxed than that of continuous pipelines,and the maximum positive and negative moment of discontinuous pipeline is less than that of continuous pipeline;The negative bending moment of the discontinuous damaged pipeline changes greatly on both sides of the pipeline;The settlement of deep soil conforms to Gaussian distribution,and the maximum settlement of soil increases with the increase of soil depth.
作者
魏纲
王辰
丁智
尹鑫晟
丁玉琴
WEI Gang;WANG Chen;DING Zhi;YIN Xinsheng;DING Yuqin(Department of Civil Engineering,Zhejiang University City College,Hangzhou,Zhejiang 310015,China;College of Civil and Architecture,Anhui University of Science and Technology,Huainan,Anhui 232001,China)
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2019年第S02期3905-3912,共8页
Chinese Journal of Rock Mechanics and Engineering
基金
浙江省科技厅公益技术研究项目(2016C33051)。
关键词
隧道工程
类矩形盾构
模型试验
非连续管线
沉降
弯矩
tunnel engineering
quasi-rectangular shield
model test
discontinuous pipeline
settlement
bending moment
