| 盾构法隧道施工对邻近摩擦单桩影响的研究 |
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| 引用本文： | 王丽,郑刚.盾构法隧道施工对邻近摩擦单桩影响的研究[J].岩土力学,2011,32(Z2):621-627. |
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| 作者姓名： | 王丽 郑刚 |
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| 作者单位： | 大连交通大学土木与安全工程学院;天津大学滨海土木工程结构与安全教育部重点实验室; |
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| 基金项目： | 国家重点基础研究发展计划(973计划)资助项目(No.2010CB732106) |
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| 摘 要： | 采用对隧道洞室周边及开挖面的土体施加由盾构机引起的各种荷载的方法模拟盾构施工,通过变化隧道埋深、隧道数量及开挖顺序研究盾构法开挖隧道对邻近摩擦单桩的影响。计算结果表明,隧道与桩的水平距离不变时,隧道埋深存在一个临界值,当隧道埋深为此临界值时隧道开挖引起的桩顶沉降、桩身侧移最大;隧道埋深较小时,隧道开挖会使桩产生较小的上移;隧道与桩的水平距离缩小相同值时,隧道埋深越小,开挖引起的桩顶沉降增加量越大;双隧道开挖引起的桩顶最终沉降量大于单隧道开挖引起的桩顶最终沉降量;双隧道同时开挖引起的桩顶沉降量、桩顶最大侧移大于双隧道先后开挖引起的桩顶沉降量、桩顶最大侧移;无论是同时开挖还是先后开挖,垂直双隧道引起的桩顶沉降量明显小于平行双隧道引起的桩顶沉降量。
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| 关 键 词： | 盾构法 桩-隧道相互作用 隧道埋深 平行双隧道 垂直双隧道 开挖顺序 |
| 收稿时间： | 2010-10-22 |
Research on effects of shield driven tunneling on adjacent single friction-pile |
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| WANG Li,ZHENG Gang.Research on effects of shield driven tunneling on adjacent single friction-pile[J].Rock and Soil Mechanics,2011,32(Z2):621-627. |
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| Authors: | WANG Li ZHENG Gang |
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| Institution: | 1. School of Civil and Safety Engineering, Dalian Jiaotong University, Dalian, Liaoning 116028, China; 2. MOE Key Laboratory of Coast Civil Structure Safety, Tianjin University, Tianjin 300072, China |
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| Abstract: | Metro is an effective way to solve the traffic problem in downtown around the world.It happens occasionally that metro tunnel is constructed near building foundation such as pile foundation.It is a difficult job to evaluate the effect of tunneling on piles nearby.Finite element method is adopted to fully understand the effect.Pressures and shearing forces are enforced on the soils in the finite element models to simulate the real reactions between shield driven machine and the soil surrounded during tunneli... |
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| Keywords: | shield driven pile-tunnel interaction buried depth of tunnel twin parallel tunnels twin vertical tunnels sequence of tunneling |
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