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Junxiu Liu, Xuhui Huang, Kai Li, Yuntong Dai and Wei Ma
Basement excavation may induce deformations of the adjacent tunnels. The response of existing tunnels to basement excavation considering the critical unloading ratio is rarely studied. In this study, a three-dimensional numerical model is established to ...
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Ping Lou, Weixiong Huang and Xinde Huang
Research on tunnel excavation has rarely considered the effect of the tunnel excavation on a complete building. Therefore, this paper considered a building with a double basement and piles, and a three-dimensional finite-element model for shield tunnels ...
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Jianye Li, Qian Fang, Xiang Liu, Jianming Du, Gan Wang and Jun Wang
This article investigates and presents a case study on the Beijing Subway Line 12 excavation beneath the existing Qinghuayuan Tunnel. The composite pre-reinforcement technique was used in conjunction with the shallow tunneling method to control the disto...
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Zheng Wei and Yusheng Jiang
Surface surcharge changes the existing equilibrium stress field of the stratum and adversely affects the existing tunnel. This paper presents a simplified analytical solution for calculating the longitudinal displacement of existing tunnels that are subj...
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Wenxiang Xu, Jianjun Shi and Hao Zhang
Building a new tunnel adjacent to an existing tunnel has become a common means of transformation in engineering. Existing tunnels are prone to some deterioration, such as cavities and cracks under long-term traffic load. This kind of deterioration tunnel...
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Armen Z. Ter-Martirosyan, Valery P. Kivliuk, Ilya O. Isaev and Victoria V. Rud
With the evolution of modern cosmopolitan cities, subterranean spaces have developed in dense urban environments. Hence, new metro tunnels often intersect with those in operation. The top-priority task of designers is to evaluate the effect of new constr...
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Cong Nie, Dongming Zhang, Linghan Ouyang, Xu Huang, Bo Zhang and Yue Tong
Undercrossing construction can cause severe structural deformation of the above existing tunnel in operation. The induced longitudinal differential settlement between the segments can pose a huge risk to running subways, hence it is of great importance t...
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Ziyong He, Chao Li, Qiao He, Yang Liu and Jiangong Chen
This paper studies the influence law of existing tunnels on the construction of intersecting new tunnels in a shallow slope burial context through 3D numerical analysis. The emphasis is on exploring the effect of new tunnels constructed in 54 conditions,...
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Junwei Zhang, Duanying Wan, Weiting Gao, Lei Zhou and Meng Wang
A dynamic disturbance will induce cracks around the tunnel in tunnel blasting or shield construction. To investigate the overall stability of cracks with various angles during a fixed borehole (round hole explosion) blasting, models containing an individ...
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Xu Zhang, Chiyu Liang, Shimin Huang and Youjun Xu
Straight-wall arch cross-sections are usually designed at the entrance and exit tunnels of subway stations, and dense underground pipelines often cross these cross-sections at close range. Among these pipelines, gas pipelines have the highest risk level....
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Xiang Liu, Annan Jiang, Qian Fang, Yousheng Wan, Jianye Li and Xinping Guo
In this paper, we study the effects of the shield tunnel construction on the deformation of an existing pipeline parallel to and above the new shield tunnel. We propose an analytical solution to predict the spatiotemporal deformation of the existing pipe...
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Xianghui Deng, Junxin Shi, Xiaolin Li, Rui Wang, Jinzeng Zhang and Xin Yang
Given the complexity and diversity of rock formations, existing constitutive models struggle to accurately portray their mechanical properties, leading to substantial discrepancies between numerical simulation outcomes and reality. This inadequacy fails ...
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Dai Xianyao, Wang Guobin, Ye Ming and Zhang Yongquan
With the growing demand for transportation, there has been a significant increase in road-related projects, leading to potential risks in the safety of existing structures. This paper presents a study on the influence of new tunnel construction on the st...
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Casey L. Denham, Mayuresh Patil, Christopher J. Roy and Natalia Alexandrov
Flight testing has been the historical standard for determining aircraft airworthiness. However, increases in the cost of flight testing and the accuracy of inexpensive CFD encourage the adoption of certification by analysis to reduce or replace flight t...
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Yue Jiang, Yanlin Li, Aijun Yao, Xiangzhi Gao and Hui Li
In recent years, there has been a rise in the construction of expansive underground structures and shield tunnels with exceptionally large diameters. These projects introduce unique challenges regarding their impact on the surrounding soil and structures...
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Gang Wei, Pengfei Xiang, Haibo Jiang, Di Sun, Fengjun Xu and Huifang Guo
For the effect of two-sided sudden surcharge/unloading on existing shield tunnels, an indoor dimensional reduction model test was conducted at a scale of 1:15.5, measuring the ground settlement, lateral convergence of the shield tunnel, and additional su...
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Serge Sutulo and C. Guedes Soares
Possible reduction of the installed power on newly designed merchant ships triggered by requirements of the Energy Efficiency Design Indices (EEDI) raised concern in possible safety degradation and revived interest in manoeuvrability standards to make th...
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S. A. Gryaznova,N. V. Khvorost
Pág. 83 - 86
Analysis of emergency operation modes of a tunnel ventilation systems used in subway systems has shown that they do not provide stable gas air streams in case of fire in the rolling stock and its stop in the tunnel, and there is no methodological support...
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S. A. Gryaznova,N. V. Khvorost
Pág. 152 - 156
Analysis of the emergency operation modes of tunnel ventilation systems used in subways has shown that these modes do not provide the steady gas-air flows in case of fire in the rolling stock and its stop in the tunnel; and there is no methodological sup...
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Yunfei Gao, Guogui Huang, Yinxi Li, Junyuan Zhang, Zeng Yang and Meng Wang
Homogenization methods can characterize the mechanical properties of these materials based on appropriate constitutive models and data. They are also applied to the characterization of mechanical parameters under complex geotechnical conditions in geotec...
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