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Tang C.-Z.,Wuhan Municipal Engineering Quality Supervision Station | Peng X.-Q.,Wuhan Bureau of Civil Engineering Design Examination
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2010

After describing the hydrogeological profile in Wuhan area, the groundwater conditions in station excavation of first-phase project of Wuhan Metro Line 2 are especially introduced. A treatment method for the problem of groundwater is proposed combined with the current status of design of groundwater of Wuhan subway. Source


Zhang D.-M.,Tongji University | Zou W.-B.,Wuhan Municipal Engineering Quality Supervision Station | Yan J.-Y.,Maintenance Management of Shanghai Metro Co.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2014

Grouting is frequently used to control and adjust the large transverse deformation of shield tunnels in clays. However, the grouting is usually performed based on the engineering experience. The control mechanism of grouting for the tunnel transverse deformation is not clear. In this paper, the method to simulate the performance of grouting through the resulted soil expansion is proposed and validated. The effect of grouting on the large transverse deformation of shield tunnels is investigated in terms of the change of tunnel diameter and joint movement using numerical simulation. The optimization is finally carried out through the parametric study. The researches indicate that the grouting can significantly reduce the tunnel transverse deformation and joint opening, and can also produce remarkable joint offset when the volumetric strain of ground caused by the grouting is larger than 3%. The grouting firstly causes rotation and then rigid movement of tunnel segements. Thereafter, the joint opening reduces more significantly due to the segmental rotation at the beginning of grouting. The joint offset increases significantly due to the rigid movement of tunnel segments when more grouting is injected. Source


Tang C.-Z.,Wuhan Municipal Engineering Quality Supervision Station | Peng X.-Q.,Wuhan Bureau of Civil Engineering Design Examination | Wang Y.,Wuhan Municipal Engineering Quality Supervision Station
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2012

Combined with a municipal project in Wuhan, the cause analysis and treatment of ascident risk of excavation are discussed. The experience and lessons are summarized. Some aspects for construction of excavations in old clayey soils, are investigated. It will provide reference for similar projects. Source


Tang C.-Z.,Wuhan Municipal Engineering Quality Supervision Station | Peng X.-Q.,Wuhan Bureau of Civil Engineering Design Examination | Xiong Q.-M.,Wuhan Municipal Engineering Quality Supervision Station | Wang Y.,Wuhan Municipal Engineering Quality Supervision Station
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2012

Aiming at the technical characteristics of constructing excavations of stations of project stage No.1 of Metro Line 3 in Wuhan, combined with the geological and hydrogeological characteristics, the possible risks during construction process of excavations are analyzed, and the corresponding countermeasures are put forward so as to control and reduce the construction risks and to ensure the safety of excavation construction. Source


Chen P.,China Communications Construction Company Ltd. | Zhang Y.,China Communications Construction Company Ltd. | Tang D.,Wuhan Municipal Engineering Quality Supervision Station | Zhuang Y.,China Railway First Survey and Design Institute Group Co.
Modern Tunnelling Technology | Year: 2013

Rock mass parameters are the key factors of the security analysis in geotechnical engineering, and at present, the inverse analysis is normally used to determine the rock mass parameters. Aiming at the problems concerning local optimization solution and initial value input with conventional inverse method, the MATLAB software is adopted to develop the inversion program of parameters based on simulated annealing arithmetic method (SAA), realizing the analysis with coupling of simulated annealing method and AB AQUS finite element software. The global optimization inversion is to be reached by means of setting the probability of escaping from local optimization solution during the inversion of iterative process. The calculation experimental model concept is proposed to validate the effectiveness and practicability of the inversion program, and the effective parametric inverse analysis is carried out based on a foundation pit project in Nanjing. Source

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