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Tunnelling performance prediction of cantilever boring machine in sedimentary hard-rock tunnel using deep belief network

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Journal of Mountain Science 2023年第7期20卷 2029-2040页

作者： SONG Zhan-ping CHENG Yun ZHANG Ze-kun YANG Teng-tian School of Civil Engineering Xi'an University of Architecture and TechnologyXi'an 710055China School of Civil Engineering Yancheng Institute of TechnologyYancheng 224051China Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering Xi'an 710055China School of Highway Chang’an UniversityXi’an 710064China China Railway Construction Bridge Engineering Bureau Group Co. Ltd.Tianjin 300300China

Evaluating the adaptability of cantilever boring machine(CBM) through in-depth excavation and analysis of tunnel excavation data and rock mass parameters is the premise of mechanical design and efficient excavation in the field of underground space *** paper presented a case study of tunnelling performance prediction method of CBM in sedimentary hard-rock tunnel of Karst landform type by using tunneling data and surrounding rock *** uniaxial compressive strength(UCS),rock integrity factor(Kv),basic quality index([BQ]),rock quality index RQD,brazilian tensile strength(BTS) and brittleness index(BI) were introduced to construct a performance prediction database based on the hard-rock tunnel of Guiyang Metro Line 1 and Line 3,and then established the performance prediction model of cantilever boring *** the deep belief network(DBN) was introduced into the performance prediction model,and the reliability of performance prediction model was verified by combining with engineering *** study showed that the influence degree of surrounding rock parameters on the tunneling performance of the cantilever boring machine is UCS > [BQ] > BTS >RQD > Kv > *** performance prediction model shows that the instantaneous cutting rate(ICR) has a good correlation with the surrounding rock parameters,and the predicting model accuracy is related to the reliability of construction *** prediction of limestone and dolomite sections of Line 3 based on the DBN performance prediction model shows that the measured ICR and predicted ICR is consistent and the built performance prediction model is *** research results have theoretical reference significance for the applicability analysis and mechanical selection of cantilever boring machine for hard rock tunnel.

关键词： Urban metro tunnel Cantilever boring machine Hard rock tunnel Performance prediction model Linear regression Deep belief network

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Analytical model of vertical load acting on jacked pipe considering soil arching effect in cohesionless soil

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Underground Space 2024年第1期14卷 263-284页

作者： Yu Zhang Lianjin Tao Xu Zhao Jun Liu Weizhang Liao Fei Guo Xiaohui Yang Ruiqin Zhong Beijing Advanced Innovation Center for Future Urban Design Beijing University of Civil Engineering and ArchitectureBeijing 102627China The Key Laboratory of Urban Security and Disaster Engineering Ministry of EducationBeijing University of TechnologyBeijing 100024China Beijing Municipal Construction Group Co. LtdBeijing 100045China Beijing Municipal Engineering Institute Beijing 100037China

For the project of pipe jacking in cohesionless soil,it is key to determine the vertical load on jacked pipe so as to predict the jacking force *** this paper,a new parabolic soil arching model was proposed to calculate the vertical load on jacked *** proposed analytical model was composed of parabolic soil arching zone,parabola-typed collapse zone and friction arch *** with existing literature,the key parameters(i.e.,height of parabolic soil arching,horizontal pressure coefficient and width and height of friction arch)were *** addition,considering that the trajectory of major stress is parabola,the formula of horizontal pressure coefficient was deduced in the friction *** parabolic soil arching zone is assumed as a three-hinged arch with reasonable arch axis,and the formula of load transfer was derived considering the transition effect of parabolic soil *** results of experiment,theoretical models and numerical model were adopted to verify the proposed analytical ***,the influence of the key parameters on the vertical load on jacked pipe were also discussed in *** work provides a meaningful reference for evaluating the vertical load on jacked pipe for design of pipe jacking.

关键词： Jacked pipe Soil arching effect Theoretical model Parabolic soil arching model Vertical load

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Attention-based LSTM predictive model for the attitude and position of shield machine in tunneling

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Underground Space 2023年第6期13卷 335-350页

作者： Qing Kang Elton J.Chen Zhong-Chao Li Han-Bin Luo Yong Liu State Key Laboratory of Water Resources Engineering and Management Wuhan UniversityWuhan 430072China School of Civil&Hydraulic Engineering Huazhong University of Science&TechnologyWuhan 430074China Tunnel Engineering Company Wuhan Municipal Construction Group Co.LtdWuhan 430023China

Shield machine may deviate from its design axis during excavation due to the uncertainty of geological environment and the complexity of *** study therefore introduced a framework to predict the attitude and position of shield machine by combining long short-term memory(LSTM)model with attention *** data obtained from the Wuhan Rail Transit Line 6 project were utilized to verify the feasibility of the proposed *** adding the attention mechanism into the LSTM model,the proposed model can focus more on parameters with higher *** analysis based on Pearson correlation coefficient was conducted to improve the prediction efficiency and reduce the irrelevant input *** with LSTM model,LSTM-attention model has higher *** mean value of coefficient of determination(R^(2))increases from 0.625 to 0.736,and the mean value of root mean square error(RMSE)decreases from 3.31 to *** proposed LSTM-attention model can provide an effective prediction for attitude and position of shield machine in practical tunneling engineering.

关键词： LSTM Shield machine Attitude and position prediction Attention mechanism Tunnel excavation

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Effect of acid rain on chemical structure and rheological properties of bitumen at different depths 7th

Effect of acid rain on chemical structure and rheological pr...

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7th Chinese-European Workshop on Functional Pavements, CEW 2023

作者： Zou, Yingxue Chen, Anqi Wu, Shaopeng Li, Yuanyuan Gao, Yangming Amirkhanian, Serji State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan China School of Civil Engineering and Architecture Wuhan Institute of Technology Wuhan China Section of Pavement Engineering Faculty of Civil Engineering & Geosciences Delft University of Technology Delft Netherlands Department of Civil Construction and Environmental Engineering University of Alabama Tuscaloosa United States

ISBN: (纸本)9781032480923

The rapid development of economy has led to an increase of acid rain that can react with the bitumen physically and chemically, causing further damage to the bitumen properties. Therefore, the effects of acid rain on the chemical composition and rheological properties of bitumen at different depths were investigated in this study. Fourier transform infrared spectroscopy and dynamic shear rheometer tests were performed on the bitumen samples after immersion in acid rain. The results show that in the early stage of immersion, acid rain leads to carbonyl dissolution, reduction of complex modulus, increase of phase angle, and softening of bitumen, thus improving the fatigue cracking resistance. In the late stage of immersion, bitumen is gradually oxidized to form carbonyl group. The change degree of complex modulus and phase angle decreases, and the fatigue cracking resistance is weakened with time. The effect of acid rain on the fatigue cracking resistance fluctuates more for bitumen at 0~50 μm and is more stable for bitumen at 50~100 μm. Keywords: bitumen, acid rain, chemical structure, rheological properties, fatigue cracking Resistance © 2024 The Author(s).

关键词： Fourier transform infrared spectroscopy

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Numerical investigation for the flexural load behaviour of profiled composite slab strengthened with CFRP

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Materials Today: Proceedings 2022年 61卷 1115-1125页

作者： Abdulrazzaq, Marwah M. Hilo, Salam J. Sabih, Saba M. Hilmi, Shams A. Al-Zand, Ahmed W. Ali, Mustafa M. Department of Building and Construction Technology Engineering AL-ESRAA University College Baghdad Iraq Civil Engineering Department University of Technology Iraq Selangor Malaysia

The profiled composite slab (PCS) is a composite structural system consisting of profiled steel sheet in-filled with concrete in the troughs and connected using studs. This system is a structural load bearing element. Lately, this system has been increasingly used as flooring or roofing structural element. The PCS has become as an extension or development to the most popular now a day's composite slab called profiled steel sheet dry board which was brought to the United Kingdom as an alternative to timber joist flooring for small span domestically buildings. Similarly, to other structural members, PCS demands strengthening and continuous upgrading due to many reasons like exposing to accidents or to improve its ability to bear an extra load. There are a quite limited studies related to the improvement of the PCS strength thus, this study suggests investigating the effect of using carbon fiber reinforced polymer (CFRP) plates to strength the PCS and enhance its ability to carry an extra load. Three parametric studies were considered in this study, the effect of thickness, length and location of the CFRP plates on the flexural load behaviour. The FE analysis results, proved that using CFRP as a strengthen technique for the PCS system has a positive effect on the ultimate flexural bearing capacity which increased by 16.5%, 29.5% and 41.0% using different CFRP plate thickness (1.5, 3.0, and 4.5 mm, respectively). Moreover, when different CFRP plates length (1000, 1500 and 2000 mm) were used the ultimate flexural bearing capacity raised up to 4.0%, 10.0% and 16.5% respectively while the amount of increment were 16.5% and 39.0% when using different CFRP number of sheets (2 and 4 sheets respectively). Lastly, this study strongly recommends using CFRP sheets as a strengthen technique for the PCS system. © 2022

关键词： Finite element method

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Variations in hydraulic properties and collapse deformation of loess under vertical stress

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Environmental Earth Sciences 2025年第6期84卷 1-11页

作者： Ran, Guoliang Zhu, Yanpeng Li, Tong Feng, Guangke Yang, Wen Lanzhou University of Technology Gansu Lanzhou China Lanzhou Resources & Environment Voc-Tech University Gansu Lanzhou China School of Civil Engineering Lanzhou University of Technology Gansu Lanzhou China China Nuclear Huachen Construction Engineering Co. LTD Shaanxi Xixian New Area China

To study the effect of vertical stress on the collapsibility and hydraulic properties of Lanzhou loess during infiltration, a series of constant head permeability tests were conducted on unsaturated remolded loess under different vertical stresses using a one-dimensional soil column permeameter. The tests yielded collapse deformation curves, wetting front, cumulative infiltration volume, volumetric water content time-history curves, and soil–water characteristic curves. The unsaturated permeability coefficient was calculated using the wetting front advancement method, and its relationship with suction and volumetric water content was established. The study results indicated: (1) The wetting front advancement rate gradually slowed down over time, especially under higher vertical stress;the relationship between the wetting front advancement and time can be described by a power function. (2) The infiltration rate experienced three stages with increasing time: rapid infiltration, significant infiltration, and stable infiltration, significantly influenced by vertical stress. The relationship between cumulative infiltration volume and time can be described by the Philip infiltration model. (3) The collapse deformation over time can be divided into three stages, with stress significantly affecting the time intervals and collapse deformation amounts at each stage. (4) The soil–water characteristic curves during the infiltration process shifted upward with increasing stress, which also significantly impacts the air entry value and the absorption rate. The unsaturated permeability coefficient increased with decreasing matric suction and increased with increasing volumetric water content. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2025.

关键词： Sediments

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Exploring the Combined Effects of Socio-Political Conflicts and Patriarchic Society on a construction Career Path: Evidence from Afghan Female Professionals

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International Journal of construction Education and Research 2024年第1期20卷 98-118页

作者： Kakar, Ahmad Shah Hasan, Abid Construction Engineering and Management Dept. of Civil Engineering Indian Institute of Technology Delhi New Delhi India School of Architecture and Built Environment Faculty of Science Engineering and Built Environment Deakin University Geelong Australia

Women’s under-representation in the construction industry is evident in developing and developed economies worldwide. Previous studies show that several factors, including cultural and societal norms, result in the low participation of women in the construction industry. This study explores the combined effects of socio-political conflicts and patriarchic society on female construction professionals’ experiences and career paths in the Afghan construction industry. The thematic analysis of the qualitative data collected from in-depth semi-structured interviews with eight Afghan female construction professionals revealed that social and political unrest influenced their career choices and career growth in the Afghan construction industry. In addition, widespread corruption and security issues distinctly shaped their work experiences. The findings also revealed the negative influence of overprotective culture and religious beliefs on women professionals’ experiences and careers. Finally, this study found that office-based roles, family support, and technology adoption encouraged women’s participation in the Afghan construction industry. Given the scarcity of research from similar contexts, this study provides empirical evidence on various challenges female professionals face in the construction industry in patriarchic societies and war-affected and conflict-sensitive regions. © 2023 The Author(s). Published with license by Taylor & Francis Group, LLC.

关键词： Afghanistan construction industry patriarchy war women professionals

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Mechanical Properties of Spatial Intersecting Nodes with Steel Fiber-Reinforced Recycled Concrete in Oblique Grids 9

Mechanical Properties of Spatial Intersecting Nodes with Ste...

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9th International Technical Conference on Frontiers of Hydraulic and civil engineering technology, HCET 2024

作者： Wang, Jinge Wang, Feicheng Meng, Ziwei Wei, Daoquan Construction Institute Guangdong Technology College Zhaoqing526070 China College of Civil Engineering Guilin University of Technology Guilin541004 China

ISBN: (纸本)9781643685595

To investigate the mechanical properties of oblique grid spatial intersecting nodes filled with steel fiber-reinforced recycled concrete (OGSIN-SFRRC), a three-dimensional solid model was developed using ABAQUS. This study examines the effects of six parameters on the mechanical behavior of the intersecting nodes under axial compression: spatial intersecting angle, planar intersecting angle, symmetry coefficient, steel ratio in the cross-section, recycled aggregate replacement rate, and steel fiber content. The results reveal that the wall thickness of the steel tube and the strength of the concrete should be uniform in both the joint and non-joint regions. The spatial intersecting angle, symmetry coefficient, and aggregate replacement rate significantly affect the initial stiffness and ultimate load of the components. Components with a higher steel ratio necessitate a greater vertical range of circumferential restraint. Specimens with higher aggregate replacement rates exhibit diminished load-bearing capacity, with the ultimate load and elastic stiffness decreasing by 14.10% and 10.19%, respectively, for specimens with a 100% replacement rate compared to those with a 0% replacement rate. Steel fibers substantially improve the ultimate load and energy dissipation capacity of the components. The OGSIN-SFRRC demonstrates superior axial compression and seismic performance, making it suitable for practical engineering applications. Additionally, nonlinear fitting of the existing CFST bearing capacity formula provided a revised calculation formula for joint bearing capacity that accounts for parameter variations, enabling accurate estimation of the ultimate bearing capacity of OGSIN-SFRRC. © 2024 The Authors.

关键词： Fiber reinforced concrete

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Effects of fracture evolution and non-Darcy flow on the thermal performance of enhanced geothermal system in 3D complex fractured rock

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International Journal of Mining Science and technology 2024年第4期34卷 443-459页

作者： Yachen Xie Jianxing Liao Pengfei Zhao Kaiwen Xia Cunbao Li Department of Civil and Mineral Engineering University of TorontoToronto M5S1A4Canada College of Water Resources and Hydropower Sichuan UniversityChengdu 610225China State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsWuhan 430071China College of Civil Engineering Guizhou UniversityGuiyang 550025China Institute of Geosafety School of Engineering and TechnologyChina University of GeosciencesBeijing 100083China State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering Shenzhen UniversityShenzhen 518060China

In fractured geothermal reservoirs,the fracture networks and internal fluid flow behaviors can significantly impact the thermal *** this study,we proposed a non-Darcy rough discrete fracture network(NR-DFN)model that can simultaneously consider the fracture evolution and non-Darcy flow dynamics in studying the thermo-hydro-mechanical(THM)coupling processes for heat extraction in geothermal *** further employed the model on the Habanero enhanced geothermal systems(EGS)project located in ***,our findings illustrate a clear spatial-temporal variation in the thermal stress and pressure perturbations,as well as uneven spatial distribution of shear failure in 3D fracture *** shear failure is mainly concentrated in the first fracture ***,channeling flow have also been observed in DFNs during heat extraction and are further intensified by the expansion of fractures driven by thermal ***,the combined effect of non-Darcy flow and fracture evolution triggers a rapid decline in the resulting heat rate and *** NR-DFN model framework and the Habanero EGS's results illustrate the importance of both fracture evolution and non-Darcy flow on the efficiency of EGS production and have the potential to promote the development of more sustainable and efficient EGS operations for stakeholders.

关键词： Coupled THM model Non-Darcy flow Deformable DFN Enhanced geothermal systems

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Enhancing Knowledge Management in the construction Industry: Exploring the Impact of Semantic Web Technologies 7th

Enhancing Knowledge Management in the Construction Industry:...

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7th International Conference on construction, Real Estate, Infrastructure, and Project Management, ICCRIP 2023

作者： Kone, Venkatesh Mahesh, Gangadhar Ingle, Prachi Vinod Department of Civil Engineering National Institute of Technology Karnataka Surathkal India School of Construction Nicmar University Pune Pune India

ISBN: (纸本)9789819649013

This research paper investigates the practical applications of Semantic Web technologies within the construction industry, specifically focusing on their role in knowledge management. The methodology employed for this research entails a systematic literature review, wherein relevant studies pertaining to Semantic Web technologies in the construction industry are gathered and meticulously analyzed. The study’s findings provide valuable insights into the benefits, challenges, and opportunities associated with the implementation of Semantic Web technologies for knowledge management purposes. The research reveals that Semantic Web technologies play a vital role in facilitating enhanced knowledge discovery, integration, and retrieval within construction projects. By establishing interoperability and integrating diverse data sources, these technologies effectively break down data silos and enable a comprehensive view of project information. Moreover, the study demonstrates that Semantic Web technologies support efficient collaboration, improve decision-making processes, and enable advanced analytics and predictive capabilities within construction projects. The significance of this research paper lies in its contribution to the understanding of Semantic Web technologies and their potential to revolutionize knowledge management practices within the construction industry. In conclusion, this research paper highlights the transformative impact of Semantic Web technologies on knowledge management in construction, establishing a robust foundation for future research and practical implementation in this dynamic industry. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Latent semantic analysis

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