天津软土地层重叠盾构隧道施工地表变形规律研究
U455.43%U231.3; 重叠盾构隧道施工会对地层产生二次扰动,造成地表变形加剧.为研究其地表变形规律,依托天津地铁5号线宾馆西路—环湖西路区间和6号线环湖西路—宾馆西路区间隧道工程,采用FLAC3D对两种开挖顺序进行数值模拟,并对15个地表监测断面的实测数据进行分析,得到天津软土地层重叠盾构隧道施工地表变形规律.研究结果表明:(1)本工程中上部隧道推进土压力和静止土压力比值α的合理取值范围为2.0～2.4,下部隧道α宜取1.2～1.6;(2)对地表实测数据进行拟合,可近似认为Peck公式中的沉降参数 k服从N～(0.981,0.230)的分布;(3)不同开挖顺序地表沉降曲线的形状和宽度...
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| Published in | 铁道标准设计 Vol. 66; no. 10; pp. 130 - 136 |
|---|---|
| Main Authors | , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
中国矿业大学(北京)力学与建筑工程学院,北京 100083
01.10.2022
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1004-2954 |
| DOI | 10.13238/j.issn.1004-2954.202107310001 |
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| Abstract | U455.43%U231.3; 重叠盾构隧道施工会对地层产生二次扰动,造成地表变形加剧.为研究其地表变形规律,依托天津地铁5号线宾馆西路—环湖西路区间和6号线环湖西路—宾馆西路区间隧道工程,采用FLAC3D对两种开挖顺序进行数值模拟,并对15个地表监测断面的实测数据进行分析,得到天津软土地层重叠盾构隧道施工地表变形规律.研究结果表明:(1)本工程中上部隧道推进土压力和静止土压力比值α的合理取值范围为2.0～2.4,下部隧道α宜取1.2～1.6;(2)对地表实测数据进行拟合,可近似认为Peck公式中的沉降参数 k服从N～(0.981,0.230)的分布;(3)不同开挖顺序地表沉降曲线的形状和宽度无变化,开挖顺序2的最大地表沉降增加0.8 mm;(4)"先下后上"的开挖顺序时,地表沉降槽宽度主要受下部隧道影响. |
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| AbstractList | U455.43%U231.3; 重叠盾构隧道施工会对地层产生二次扰动,造成地表变形加剧.为研究其地表变形规律,依托天津地铁5号线宾馆西路—环湖西路区间和6号线环湖西路—宾馆西路区间隧道工程,采用FLAC3D对两种开挖顺序进行数值模拟,并对15个地表监测断面的实测数据进行分析,得到天津软土地层重叠盾构隧道施工地表变形规律.研究结果表明:(1)本工程中上部隧道推进土压力和静止土压力比值α的合理取值范围为2.0～2.4,下部隧道α宜取1.2～1.6;(2)对地表实测数据进行拟合,可近似认为Peck公式中的沉降参数 k服从N～(0.981,0.230)的分布;(3)不同开挖顺序地表沉降曲线的形状和宽度无变化,开挖顺序2的最大地表沉降增加0.8 mm;(4)"先下后上"的开挖顺序时,地表沉降槽宽度主要受下部隧道影响. |
| Author | 江玉生 杨鑫康 何擎 漆伟强 |
| AuthorAffiliation | 中国矿业大学(北京)力学与建筑工程学院,北京 100083 |
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| Author_FL | JIANG Yusheng QI Weiqiang YANG Xinkang HE Qing |
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| Keywords | 重叠盾构隧道 地表沉降 数值模拟 土压力分析 软土地层 实测数据 |
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| Snippet | U455.43%U231.3; 重叠盾构隧道施工会对地层产生二次扰动,造成地表变形加剧.为研究其地表变形规律,依托天津地铁5号线宾馆西路—环湖西路区间和6号线环湖西路—宾馆西路区间隧... |
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| Title | 天津软土地层重叠盾构隧道施工地表变形规律研究 |
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