| 宁波滨海软土地铁盾构隧道地表沉降效应与数值模拟研究 |
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| 引用本文： | 王小军,蒋勇,王文笛,韩凯吉,毛志鹏.宁波滨海软土地铁盾构隧道地表沉降效应与数值模拟研究[J].路基工程,2018,0(4):61. |
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| 作者姓名： | 王小军 蒋勇 王文笛 韩凯吉 毛志鹏 |
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| 作者单位： | 1.浙江大学宁波理工学院, 浙江宁波 315100 |
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| 基金项目： | 宁波市科技惠民项目:宁波复杂软土地质条件下微型钢管桩的承载特性及工程应用研究（2017C50021） |
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| 摘 要： | 从宁波地铁1号，2号线现场实测数据的peck、Sagaseta公式及其公式修正的角度出发，揭示了滨海软土地铁单线和双线隧道盾构法施工地表横向沉降槽的形状、最大沉降量及其影响范围，分析了地表测点纵向累计沉降量与盾构推进距离之间的关系。结果表明:以修正的peck和Sagaseta公式拟合曲线的相关系数和拟合精度均有提高。通过ANSYS软件模拟了宁波滨海软土地铁单线和双线隧道盾构法施工地表横向和纵向沉降规律，并与实测数据结果进行了对比分析，模拟值大于实测值，模拟结果偏于保守。
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| 关 键 词： | 滨海软土 地铁工程 盾构隧道 地表沉降 数值模拟 |
| 收稿时间： | 2019-11-11 |
Research on Ground Surface Settlement Effect and Numerical Simulation of Shield Tunnel of Subway in Soft Soil of Coast in Ningbo |
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| Abstract: | The shapes of ground surface transverse settlement trough, the largest settlements and their influence ranges of coastal soft soil subway under single and double shield tunnel excavation are revealed by putting the measured data from Ningbo urban rail transit No.1 and No.2 lines into Peck, Sagaseta formula and our modified formula. The relationship curves between longitudinal cumulative settlement of ground surface monitoring points and shield advance distance are also analyzed. The results show that the correlation coefficient and precision of fitting curve are improved by our modified Peck and Sagaseta formula.The transverse and longitudinal settlement laws of ground surface for coastal soft soil subway under single and double shield tunnel excavation are simulated by ANSYS software, compared and analyzed with the results of measured data. Analog value is greater than the measured value and the simulation results are conservative. |
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