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隧道建设(中英文) ›› 2013, Vol. 33 ›› Issue (5): 348-353.DOI: 103973/jissn1672-741X201305003

• 研究与探索 • 上一篇    下一篇

大直径泥水盾构施工对软土地层的沉降影响研究

朱建明1, 程海峰1, 江强2,3   

  1. (1.北方工业大学建筑工程学院, 北京 100144; 2.江阴市人民政府重点工程建设办公室, 江苏江阴 214400;3.河海大学土木与交通学院, 江苏南京 210098)
  • 收稿日期:2013-01-04 修回日期:2013-03-18 出版日期:2013-05-20 发布日期:2013-05-16
  • 作者简介:朱建明(1963—),男,江苏盐城人,1998年毕业于北京科技大学采矿工程专业,博士,副教授,主要从事地下工程的研究与教学工作。
  • 基金资助:

    国家自然科学基金资助项目(10872016)

Study on Soft Ground Settlement Caused by Large Diameter Slurry Shield Boring

ZHU Jianming1, CHENG Haifeng1, JIANG Qiang2, 3   

  1. (1. College of Architecture and Civil Engineering, North China University of Technology,Beijing 100144, China; 2. Jiangyin People’s Government Key Project Construction Office, Jiangyin 214400, Jiangsu, China; 3. Civil Engineering and Transportation Institute of Hohai University, Nanjing 210098, Jiangsu, China)
  • Received:2013-01-04 Revised:2013-03-18 Online:2013-05-20 Published:2013-05-16

摘要:

依托江苏江阴澄江西路过江隧道工程,对大直径泥水盾构施工对软土地层的扰动影响进行研究。主要研究方法及结论如下: 1)对盾构掘进中地表纵向沉降规律进行探讨,在前人研究的基础上对引起土体扰动的4个阶段进行验证,得出软土地层施工中不同阶段对土体扰动程度的比例。2)使用ABAQUS有限元软件,建立三维有限元模型,在数值计算中考虑土体非线性变形。通过数值模拟可知,横、纵、竖向位移趋势符合工程实况,最大沉降量与实测数据比较接近;增大上部土层的E,c,φ值可以有效地减小软土地层的沉降量,降低盾构施工对土体的扰动影响。从而论证了通过对土体表层注浆加固可以达到减小沉降,降低土体扰动的目的。

关键词: 江阴澄过江隧道, 大直径泥水盾构, 土体沉降, 软土地层, 注浆加固, 数值模拟

Abstract:

The disturbance to soft ground caused by large diameter slurry shield boring is studied, with Chengjiang West Road rivercrossing tunnel in Jiangyi city, Jiangsu province as an example. The main contents and conclusions of the study are as follows: 1) The rules of the longitudinal ground surface settlement caused by shield tunneling are studied, the four stages of the ground disturbance caused by shield tunnel are verified on basis of previous study results, and the percentages of the ground disturbance caused by shield tunneling in different stages are obtained. 2) 3D finite element model is established by means of ABAQUS finite element software and the nonlinear deformation of the ground is considered in the numerical calculation. The numerical simulation shows that the trends of the transverse, longitudinal and vertical displacement coincides with the actual conditions of the works, and the maximum settlement value is close to the measured data; the settlement of the soft ground can be effectively reduced by increasing the values of E, c and φ of upper soil layers, and in turn the disturbance to the ground caused by shield tunneling can be reduced. It is concluded that the settlement and disturbance of the ground can be reduced by means of grouting reinforcement of the surface layers of the ground. 

Key words: large diameter slurry shield, ground settlement, soft ground, grouting reinforcement, numerical simulation