Chen H.-W.,China Railway 22nd Construction Bureau Co.
Tiedao Xuebao/Journal of the China Railway Society | Year: 2012
Considering the fact that the Shibanshan Tunnel of the Shijiazhuang-Taiyuan Passenger Dedicated Line was located in the arid mountain area where underground water resources were lacking, the ecological environment was fragile and tunnel construction had some impact on local domestic and production water supply, study on recovery of the underground water level was made. The influence of construction measures including grouting reinforcement, radial grouting reinforcement and shotcreting and support closing time on recovery of the underground water level was analyzed to provide technical basis for reasonable choice of design and construction schemes. The results show as follows: Recovery of the underground water level is related to engineering factors in the tunnel affected area; different support closing modes cause obviously differentiated effect on recovery of the underground water level whereas little effect is created when referring to the support closing time.
Deng H.,Beijing University of Technology |
Chen K.,China Railway 22ND Construction Bureau Co. |
Deng Q.,Beijing University of Technology |
Ni T.,Beijing University of Technology |
Zhu M.,Beijing University of Technology
Research Journal of Applied Sciences, Engineering and Technology | Year: 2013
In this study, the author has developed a data management system of tunnel monitoring by using ACCESS database and made a new exploration in the field of tunnel monitoring data management. This study introduces the principles, the methods and the functions of this system. The system sets data input, data management, data applications and other functions all in one. It has made a good connection between the visual interface of front deskand the ACCESS database for monitoring information storage. What's more, it has realized functions of data entering, storage, querying, generating tense curve and space state diagrams, regression analysis and reports generating. The successful application in the engineering practice proves the validity and reliability of this system and it also providesanew way for tunnel monitoring data analysis. © Maxwell Scientific Organization, 2013.
Liu J.,Qingdao Technological University |
Xing X.,China Railway 22nd Construction Bureau Co. |
Liu Z.,Qingdao Technological University
Advanced Materials Research | Year: 2012
As Steel reinforced concrete (SRC) structure has a good prospect in Practical engineering, large number of studies carried out home and abroad, as for the study of the Steel reinforced concrete composite torsion, research data is not mature at present time. This paper analyzed the steel reinforced concrete members' Torsion properties under combined force by method of the finite element analysis. Considering the main affecting factors like compression ratio to reveal the SRC structures under the force of monotonic torque's characteristics of the damage and capacity, etc.
Dai C.-Q.,Shandong University of Science and Technology |
Wang L.,Shandong University of Science and Technology |
Huang M.-Q.,China Railway 22nd Construction Bureau Co.
Beijing Gongye Daxue Xuebao/Journal of Beijing University of Technology | Year: 2012
Urban tunnel engineering has the characteristics including poor engineering geological condition, sensitive to displacement transformation of ground building structure, complicated underground pipeline network, complex construction managements, high degree of difficulties, and more potential risk factors, which are so easy to cause collapses, ground-surface settlements, cracks on upper building structure, and the collapse engineering accidents so that it a risk management analysis. By building the urban tunnel construction mechanical model and designing the orthogonal simulating test scheme, the ground settlement value of tunnel construction is calculated by using the orthogonal simulating test hierarchy theory, the influence weight of complex risk index at every factor level in tunnel construction is calculated. The tunnel construction risk value and the risk ranking of each working condition combined with Jiaozhou Bay sub-sea tunnel are obtained.
He M.,Tsinghua University |
Xin K.,Tsinghua University |
Guo J.,Tsinghua University |
Guo J.,Chinese Research Institute of Highway |
Guo Y.,China Railway 22nd Construction Bureau Co.
Zhongguo Tiedao Kexue/China Railway Science | Year: 2012
In general, Self-Centering Pier (SCP) consists of load bearing components, self-centering components, energy dissipaters and joints (e.g. tongue groove joint etc.). SCP has outstanding reparability and negligibly small post-earthquake residual deformation. Its mechanical characteristics, including bearing capacity, lateral stiffness and hysteretic behaviour are analyzed theoretically. The analytical expression of the lateral stiffness of SCP as a function of the flexural stiffness of load bearing components, the tensile stiffness of self-centering components and energy dissipater, the initial pretension and the physical dimension of pier is derived. The concept and formula of the intrinsic lateral stiffness of SCP are proposed to reveal the inherent property of SCP. The upper bound and lower bound of SCP lateral stiffness are the flexural stiffness of load bearing components and the intrinsic lateral stiffness of SCP respectively. The fan-bladed hysteretic behaviour of SCP is the result of superposing the hysteretic behaviour of energy dissipaters upon the self-centering components. Based on performance-based design principle, self-centering 3 steps (SC3S) design method in which post-earthquake residual deformation is considered, is proposed for engineering practice.