Article
Engineering, Geological
Baogang Mu, Wenkun Yang, Yanlong Zheng, Jianchun Li
Summary: This article presents a case study on predicting while tunnelling in a rock tunnel project in Shenzhen, China. The study found that the torque penetration index is a better parameter for predicting rock excavation penetration rate than the field penetration index, and statistical models can accurately predict construction progress.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2022)
Article
Engineering, Geological
Shaokang Hou, Yaoru Liu, Wenyu Zhuang, Kai Zhang, Rujiu Zhang, Qiang Yang
Summary: This paper proposes a shield jamming risk prediction method based on numerical samples and random forest classifier. By establishing a database with samples of different risk levels and conducting feature importance analysis, the model is successfully built and shows good prediction performance on the test set.
Article
Multidisciplinary Sciences
Dipaloke Majumder, M. N. Viladkar, Mahendra Singh
Summary: A novel numerical paradigm (Three Analysis Method) is proposed for finite element analysis of tunnels excavated in squeezing ground. The elastic-plastic behavior of the rock mass and the interaction between tunnel support structure and rock mass are considered in this study. The framework is applied to a case study of a hydro-electric project in India, and the tunnel convergence, stress distribution, ground-reaction behavior, and support characteristic are quantified.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Civil
Qixiang Yan, Haojia Zhong, Chuan Zhang, Zechang Zhao, Yanxin Wen, Ping Wang
Summary: The leakage of water through segmental joint gaskets is a major concern for underwater shield tunnels, affecting their normal serviceability. Investigating the sealing performance of the joint gaskets is essential in evaluating the waterproof capacity of these tunnels.
Article
Construction & Building Technology
Atik Sarraz, Hikaru Nakamura, Taito Miura
Summary: In this study, a mesoscale model of steel fiber reinforced concrete (SFRC) considering different fiber shapes (straight and hook end) and orientations was proposed. The model successfully predicted the macroscopic response and cracking behavior of SFRC under direct tensile and bending loads. The mechanical hook action was found to be the most important parameter for hook end fibers, while bond-slip properties played a crucial role for straight fibers. The anisotropy caused by fiber shapes and orientations was mainly controlled by hook end fibers, which exhibited superior load capacity and delayed crack propagation.
CEMENT & CONCRETE COMPOSITES
(2023)
Article
Engineering, Geological
Weiwei Liu, Jianxun Chen, Yanbin Luo, Lijun Chen, Zhou Shi, Yunfei Wu
Summary: This study investigated the large deformation control methods for large-span tunnels in squeezing rock, focusing on the Lianchengshan Tunnel of the Baoji-Hanzhong expressway in Shaanxi Province, China. Results showed that the double primary lining method was more effective in controlling deformation compared to the single primary lining method in chlorite schist formations. This research provides theoretical basis and practical reference for similar large-span tunnels in squeezing rock.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Engineering, Civil
Wenhui Yang, Dingwen Zhang, Anhui Wang
Summary: This study investigates the influence of construction of a river channel and a bridge on existing metro tunnels in Changzhou. It proposes a protection scheme based on 3D numerical modelling and evaluates the safety of the tunnel structures through field monitoring. The results provide insights into the construction stages and the mechanism of disturbance during short-distance pile construction.
Article
Construction & Building Technology
Xinjiang Wei, Mobao Zhang, Shaojun Ma, Chang Xia, Xingwang Liu, Zhi Ding
Summary: Based on a specific engineering case, this paper discusses the deformation characteristics and influencing factors when EPB shield tunnels cross existing metro tunnels, including the three stages of settlement development, horizontal displacement characteristics, and the impact of pipe roof prereinforcement. Recommendations are made to optimize shield tunnelling parameters before the second crossing.
ADVANCES IN CIVIL ENGINEERING
(2021)
Article
Acoustics
Shengli Yang, Hao Yue, Gaofeng Song, Junjie Wang, Yanyao Ma, Fengqi Liu
Summary: This study investigates the interaction between the roof strata and the longwall shield under dynamic impact load conditions through a 3D physical modeling platform. Findings reveal that the level of face and roof failures are influenced by the magnitude of the dynamic impact load, and the position and height of the roof fall play a crucial role in the stability of the roof and face.
SHOCK AND VIBRATION
(2021)
Article
Computer Science, Interdisciplinary Applications
Jingkang Shi, Fei Wang, Dongming Zhang, Hongwei Huang
Summary: This study investigates the short-term spatial-temporal distribution of excess pore water pressure (EPWP) induced by large diameter slurry shield tunneling in saturated soils. The distribution of EPWP is mainly influenced by shield conicity, soil compressibility, grouting pressure and tunnel diameter. The temporal distribution of EPWP is equivalent to a certain spatial distribution in the longitudinal direction.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Engineering, Geological
Hui Yang, Hongtao Shi, Xueliang Jiang, Chan Liu, Lei Yu
Summary: This study concludes that the position and construction sequence of double-line shield tunnels can have varying effects on the stress, inclination, and settlement of frame structures. The finite element analysis showed that different tunnel locations and construction sequences can impact the frame structure differently, highlighting the importance of careful planning and monitoring during tunneling operations.
GEOTECHNICAL AND GEOLOGICAL ENGINEERING
(2021)
Article
Energy & Fuels
Ferenc Deak, Matthew A. Perras, Istvan Szucs, Akos Torok
Summary: This study examined a new method of using acoustic emission (AE) monitoring data and stress analysis to calculate rock mass strength. The AE data from the National Radioactive Waste Repository (NRWR) were used to detect stress changes in the rock mass. The method used AE data to back-calculate parameters and developed an objective function based on the AE initiation threshold. The findings suggest that most AE events can be related to the crack initiation threshold, and significant irreversible deformations occur in the vicinity of the excavation damage zones.
Article
Engineering, Civil
Mukhtiar Ali Soomro, Naeem Mangi, Dildar Ali Mangnejo, Noor Ahmed Memon
Summary: This study investigated the lateral response of an existing vertically loaded 2 x 2 pile group due to the advancement of twin stacked tunnels in dry sand through centrifuge model tests and numerical simulations using an advanced hypoplastic soil model. The results showed that the most significant lateral movement of the pile cap was induced after the twin tunneling in each test. Additionally, the induced bending moment and pile deflection were critical on completion of twin tunnels in test ST.
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
(2022)
Article
Acoustics
Linchuan Guo, Yuli Zhao, Xu Wang
Summary: This study presents a novel biodynamic system modelling method to investigate how the human body responds to low-frequency vibrations. The design parameters of the seating suspension system and cushion are optimized to minimize vibration transmission, and the connection between negative Poisson's ratio and quasi-zero stiffness is explored.
JOURNAL OF VIBRATION AND CONTROL
(2023)
Article
Engineering, Civil
Gursarbjot Singh, Joshua Woods
Summary: This study aims to develop a numerical modelling approach for exposed steel base plate connections that can capture their nonlinear cyclic behavior. Two modelling approaches, suitable for detailed study of connection behavior and nonlinear time-history analysis of a structure, are proposed. Results show that both approaches can capture the nonlinear cyclic response of the connections, but their limitations are also discussed.
CANADIAN JOURNAL OF CIVIL ENGINEERING
(2022)