| 盾构隧道下穿管道施工引起的管-土相互作用研究 |
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| 引用本文： | 可文海,管凌霄,刘东海,邓建林,李科,徐长节.盾构隧道下穿管道施工引起的管-土相互作用研究[J].岩土力学,2020,41(1):221-228. |
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| 作者姓名： | 可文海 管凌霄 刘东海 邓建林 李科 徐长节 |
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| 作者单位： | 1. 华东交通大学 江西省岩土工程基础设施安全与控制重点实验室，江西 南昌 330013；2. 杭州市城东新城建设投资有限公司，浙江 杭州310016；3. 浙江杭海城际铁路有限公司，浙江 嘉兴314499；4. 浙江大学 滨海和城市岩土工程研究中心，浙江 杭州 310058 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)（No.2015CB057801）；国家杰出青年科学基金（No.51725802）；国家自然科学基金项目（No.51338009，No.51878276） |
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| 摘 要： | 采用Loganathan公式研究了盾构隧道下穿管道施工引起的地下管道处土体竖向位移，利用考虑土中剪力传递的Pasternak模型模拟管-土相互作用，运用修正Vlasov模型中的迭代流程计算出Pasternak模型的关键参数——弹性系数k与剪切系数gs。将计算结果与已有文献结果及工程监测数据进行对比，深入分析了迭代求解k、gs值的Pasternak模型与传统模型的计算差异，并进一步研究了土中剪力、管道与隧道的夹角、土体弹性模量及隧道半径的变化对管-土相互作用的影响。研究结果表明：迭代求解的k、gs值能提升Pasternak模型的精确度；土中剪力对管道竖向位移计算值的影响可达15.3%；随着管道与隧道夹角的减小，管道的竖向位移增大、弯矩减小；土体弹性模量与隧道半径的增大均会增加管道的竖向位移和弯矩。
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| 关 键 词： | Pasternak模型 修正Vlasov模型 弹性系数 土中剪力 剪切系数 |
| 收稿时间： | 2018-12-24 |
| 修稿时间： | 2019-05-05 |
Research on upper pipeline-soil interaction induced by shield tunnelling |
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| KE Wen-hai,GUAN Ling-xiao,LIU Dong-hai,DENG Jian-lin,LI Ke,XU Chang-jie.Research on upper pipeline-soil interaction induced by shield tunnelling[J].Rock and Soil Mechanics,2020,41(1):221-228. |
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| Authors: | KE Wen-hai GUAN Ling-xiao LIU Dong-hai DENG Jian-lin LI Ke XU Chang-jie |
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| Institution: | 1. Jiangxi Key Laboratory of Infrastructure Safety Control in Geotechnical Engineering, East China Jiaotong University, Nanchang, Jiangxi 330013, China;
2. Hangzhou Chengdong New City Construction Investment Co., Ltd., Hangzhou, Zhejiang 310016, China; 3. Zhejiang Hanghai Intercity Railway Co., Ltd., Jiaxing, Zhejiang 314499, China; 4. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou, Zhejiang 310058, China |
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| Abstract: | The vertical displacement of soil in the underground pipeline caused by the construction of shield tunnel was studied based on the Loganathan function. The Pasternak model considering shear transfer in soil was used to simulate the pipeline-soil interaction. The key parameters of the Pasternak model—elastic coefficient k and shear coefficient gs were solved by using the iterative procedure in the Modified Vlasov model. The calculation results were compared with the results of existing literatures and engineering monitoring data, and the differences between the proposed model and the existing result were also explored. Furthermore, a parametric study was conducted to analyse the influence of soil shear stiffness, cross angle, soil modulus and tunnel radius on the pipeline-soil interaction. The results show that the values of spring factor k and shear stiffness factor gs solved via the iteration procedure can improve the accuracy of the Pasternak model; the influence of soil shear resistance on the calculated vertical displacement of pipeline is up to15.3%; with the decreases of cross angle between the pipeline and the tunnel, the vertical displacement of pipeline increases and bending moment decreases; the increase of soil elastic modulus and the tunnel radius will increase the vertical displacement and the bending moment of pipeline. |
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| Keywords: | Pasternak model modified Vlasov model elastic modulus soil shear resistance shear stiffness factor |
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