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| 隧道开挖对周围土体及桩基影响的试验研究 | |
| 引用本文： | 孙庆,杨敏,冉侠,Leung C F.隧道开挖对周围土体及桩基影响的试验研究[J].同济大学学报(自然科学版),2011,39(7):989-993. |
| 作者姓名： | 孙庆 杨敏 冉侠 Leung C F |
| 作者单位： | 1. 同济大学岩土及地下工程教育部重点实验室,上海200092;同济大学地下建筑与工程系,上海200092 2. 中信泰富(中国投资)有限公司,上海,200080 3. 新加坡国立大学土木工程系,新加坡,119260 |
| 摘 要： | 通过离心机试验研究了粘土中隧道开挖引起的土体瞬时和长期沉降.对不同的隧道与桩间距情况进行了3组离心机试验,研究隧道开挖对桩基的瞬时和长期影响.试验结果表明,高斯曲线法计算的土体瞬时沉降与试验值比较吻合,而计算的长期沉降低估了地表沉降的影响范围.隧道开挖引起的桩身最大轴力和弯矩都发生在隧道起拱线附近,而且桩基反应都是随着... |
| 关 键 词： | 隧道开挖 离心机试验 桩基础 土体位移 轴力 弯矩 侧向变形 |
| 收稿时间： | 4/13/2010 3:31:55 PM |
| 修稿时间： | 5/11/2011 2:58:21 PM |
Test Study on Tunnelling induced Soil Movements and Pile Responses |
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| SUN Qing,YANG Min,RAN Xia and Leung C F.Test Study on Tunnelling induced Soil Movements and Pile Responses[J].Journal of Tongji University(Natural Science),2011,39(7):989-993. | |
| Authors: | SUN Qing YANG Min RAN Xia and Leung C F |
| Institution: | Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education,Tongji University,Shanghai 200092,China;Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China;Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education,Tongji University,Shanghai 200092,China;Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China;CITIC Pacific China Holdings Limited,Shanghai 200080,China;Department of Civil Engineering,National University of Singapore,Singapore 119260,Singapore |
| Abstract: | Centrifuge model tests have been conducted to study the effects of tunneling induced soil movements and single pile responses in both short and long terms in clay. Three tests are performed to evaluate the effects of distance between pile and tunnel on pile responses due to tunnel excavation. The results reveal that the surface settlement calculated by Gaussian curve in short term show agreement with centrifuge test. However, Gaussian curve underestimates the measured settlement in long term at the far end of the ground surface. Both maximum induced pile axial force and bending moment take place at the tunnel spring elevation. In addition, the pile responses decrease with an increase in pile-to-tunnel distance. However, the induced surface settlement, pile bending moment and deflection continue to increase for some time after the completion of tunnel excavation. So the effects of tunnelling in long term cannot be ignored. |
| Keywords: | tunnelling centrifuge test pile foundation soil movement axial force bending moment lateral deflection |
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