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construction Research Congress 2024, CRC 2024

作者： Younesi Heravi, Moein Jang, Youjin Chauhan, Hardik Song, Kwonsik Dept. of Civil Construction and Environmental Engineering North Dakota State Univ FargoND United States Dept. of Engineering Technology Indiana Univ.-Purdue Univ. Indianapolis IndianapolisIN United States

ISBN: (数字)9780784485293

ISBN: (纸本)9780784485293

Awkward working postures are deviations of body parts from their neutral position. construction workers who hold these postures for a long term are exposed to discomfort, reducing safety and productivity. While several studies have been conducted to assess the effect of awkward postures on human physical and musculoskeletal system like muscles and joints, little research has attempted to explore the impact of awkward posture selection on physiological system. This investigation is necessary for a broader comprehension of risky factors resulting from the awkward working postures of construction workers. Accordingly, this study aims to evaluate if and how physiological responses such as heart rate and skin temperature will be affected by awkward working postures. The study utilizes a non-invasive wearable wristband biosensor to measure and monitor participants' physiological signals during performing construction tasks in a simulated laboratory experiment. Signals in natural and awkward postures are then analyzed, and further comparisons are discussed. The results show that postures have significant impacts on physiological patterns, specifically when sustained for a longer duration. The findings of this study are expected to be used for the recognition of awkward working postures and further for the safety management interventions of worker behavior. © CRC 2024. All rights reserved.

关键词： Biosensors

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Multi criteria decision making for identifying appropriate level of automation

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construction Robotics 2024年第2期8卷 1-23页

作者： Krishnamoorthi, Sundararaman Benny, Raphael Building Technology and Construction Management Division Department of Civil Engineering Indian Institute of Technology Madras Chennai India

Optimization of resources is essential for sustainability in construction. construction automation contributes to optimal resource utilization. However, not much research has been carried out to quantify the benefits of automation in construction and to identify the most appropriate level of automation in a given project. This paper presents a methodology to identify optimal automated construction processes through model composition and stochastic search. This is applicable for both on-site and off-site construction. Through model composition, millions of potential solutions are generated. These are automatically evaluated through discrete event simulation; and performance parameters such as cost and time are computed. Through a multi-criteria decision making algorithm called RR-PARETO4, the best automated solution is identified taking into account trade-offs among conflicting objectives that are acceptable to the user. The methodology is demonstrated using a case study which shows its potential application at the stage of planning, pre-construction and during construction of the project. Through multi-criteria decision making, appropriate automated construction systems can be identified, and overall project performance can be increased.

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Design and development of tunnel liner void detection system

Design and development of tunnel liner void detection system

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ITA-AITES World Tunnel Congress, WTC 2024

作者： An, Aixia Luo, Weibin Tian, Guoqin Xu, Yinran Gao, Lin Zheng, Junxing Gansu Highway and Transportation Construction Group Co Ltd Lanzhou China Gansu Road and Bridge Construction Group Co Ltd Lanzhou China Huazhong University of Science and Technology School of Civil and Hydraulic Engineering Wuhan China

ISBN: (纸本)9781032800424

The space between the primary support and secondary lining of tunnel supporting structures is usually backfilled by grouting concrete slurry. Grouting quality significantly affects integrity of supporting structures, and therefore, the safety of tunnels. Several tunnel lining failure accidents have demonstrated that insufficient grouting and grouting defects may cause serious collapse disasters. As such, many non-destructive evaluation techniques have been developed to detect grouting defects, such as ground penetrating radar (GPR). However, these techniques cannot perform a real-time inconstruction-process grouting defects and voids evaluation. Therefore, this study aims to develop a novel equipment based on a Raspberry Pi, which can evaluate grouting quality during construction process. This equipment can automatically detect concrete backfill quality by monitoring the conductivity of backfill. Then, the Raspberry Pi connects to the internet and uploads evaluation results in real time. A smartphone application is developed, which can visualize the grouting quality detection results by Raspberry Pi. © 2024 The Author(s).

关键词： Grouting

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Micromechanical analysis of particle corner effect on bearing and deformation behaviors of coral sand slope foundation under a strip footing

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Journal of Central South University 2025年第2期32卷 624-642页

作者： PENG Yu LUO Zhao-gang HE Shao-heng QU Li-ming DING Xuan-ming Key Laboratory of New Technology for Construction of Cities in Mountain Area Chongqing UniversityCollege of Civil EngineeringChongqing 400045China Department of Civil and Environmental Engineering the Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Faculty of Geosciences and Environmental Engineering Southwest Jiaotong UniversityChengdu 610031China

To understand the specific behaviors of coastal coral sand slope foundations,discrete element method(DEM)was employed to examine the effect of breakable particle corners on the performance of coral sand slope foundations under a strip footing,from macro to micro *** results demonstrate that the bearing characteristics of coral sand slope foundations can be successfully modeled by utilizing breakable corner particles in *** dual effects of interlocking and breakage of corners well explained the specific shallower load transmission and narrower shear stress zones in breakable corner particle ***,the study revealed the significant influence of breakable corners on soil behaviors on ***,progressive corner breakage within slip bands was successfully identified as the underling mechanism in determining the unique bearing characteristics and the distinct failure patterns of breakable corner particle *** study provides a new perspective to clarify the behaviors of slope foundations composed of breakable corner particle materials.

关键词： micromechanical analysis coral sand slope foundation particle corner breakage corner interlock

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Cutting of Existing Station Pile Walls by Shield Machine Cutter Head: Mechanism and Response Analysis 12

Cutting of Existing Station Pile Walls by Shield Machine Cut...

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12th Academic Conference of Geology Resource Management and Sustainable Development, GRMSD 2024

作者： Wo, Liujie Zhao, Xingxing Yang, Ji He, Jinhua Wang, Yixian Ningbo Construction Engineering Safety and Quality Supervision Service Center Ningbo315012 China China Railway No.4 Engineering Group Co. Ltd. Hefei230022 China School of Civil Engineering Hefei University of Technology Hefei230009 China

ISBN: (纸本)9798331314545

In order to investigate the mechanism of tool response to the action of existing pile wall when shield cutting existing station, to avoid tool damage and to ensure the cutting quality, we establish the numerical simulation of the tool cutting rebar with the background of Ningbo Railway Line 8 shield penetrating the pile wall of the existing station, investigate the failure mechanism of the rebar damage, and analyse the influence of the parameters of the cutting edge width, the depth of cut and the speed of cut on the rebar and the cutting force. The results show that the tool advances and the front reinforcement extrusion, located in the front face of the tool below the bar section is sheared and spalled to form a chip failure;tangential force and blade width, depth of cut are directly proportional to the cutting speed on the cutting force has a small impact. construction should control the configuration of tool parameters, in order to prevent the tool due to the frictional resistance of the front face is too large and produce large wear, affecting the construction efficiency and progress. © 2024 Proceedings of the 12th Academic Conference of Geology Resource Management and Sustainable Development, GRMSD 2024. All rights reserved.

关键词： Railroad yards and terminals

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The Influence of Coating Material and Thickness on the Corrosion Degree of Q345 Steel 1

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2nd International Conference on Innovative Solutions in Hydropower engineering and civil engineering, HECE 2022

作者： Wan, Li Pan, Xiang Huang, Lizhen Huang, Baotao Yang, Cai Du, Yiming Capital Construction Management Office Hubei Engineering University Xiaogan China School of Civil Engineering Architecture and the Environment Hubei University of Technology Wuhan China School of Civil Engineering Hubei Engineering University Xiaogan China School of Naval Architecture and Maritime Zhejiang Ocean University Zhoushan China

ISBN: (数字)9789819917488

ISBN: (纸本)9789819917471

In order to investigate the anti-corrosion effect of coated steel of steel bridge, Q345 steel plate specimens with three types of coatings, including zinc coating, aluminum coating and zinc-aluminum coating, are produced by the arc spraying technology. In the present study, chlorine corrosion tests are performed to investigate the influence law of different coating material and its thickness on the corrosion degree. Then the calculation results of two corrosion indicators are compared and analyzed. It is shown that the two corrosion indicators reflect the same corrosion law of three kinds of coating steel. The corrosion of all coated specimens is obviously severe in the early stage and gradually gentle in the later stage. It is also found that during the whole corrosion cycle, the corrosion rate of aluminum coating is smaller and change slower than the other two kinds of coatings, whereas the coating thickness of 200 μm of aluminum coating changes significantly. Therefore, aluminum coating is recommended as a priority, and the recommended coating thickness range of which is 100–150 μm. © 2023, The Author(s).

关键词： Aluminum coatings

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Research on the Influence Factors of Road Traffic Accidents in Wuhan Based on Social Network Analysis

Research on the Influence Factors of Road Traffic Accidents ...

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2023 International Conference on construction and Real Estate Management: The Human-Centered construction Transformation, ICCREM 2023

作者： Lui, Zhijiang Yan, Hang Duan, Zhen Lu, Keqin Dept. of Civil Engineering and Architecture Wuhan Univ. of Technology Wuhan China China Seventh Bureau International Engineering Construction Co. Ltd. Guangzhou China

ISBN: (数字)9780784485217

ISBN: (纸本)9780784485217

As the scale of cities expands, traffic safety has become a common problem in cities around the world. It is significant to deeply analyze the causes and mechanisms of road traffic accidents for the sustainable development of cities. This study firstly collects the data of road traffic accident in Wuhan City from 2018 to 2022. Through analyzing the characteristics and causes of road traffic accidents in Wuhan City, the influencing factors of road traffic accidents are identified from the aspects of road conditions, traffic facilities, and personnel behavior. Secondly, social network analysis method (SNA) is adopted to construct the network correlation structure between various factors and assess their effect. Finally, based on the identified key influencing factors, this study conducts an in-depth analysis of the road traffic safety situation in Wuhan City, and provides recommendations for the government of Wuhan City to improve the safety of road traffic. The results of this study can assist the government in formulating more effective policies for traffic safety management and facilitate the sustainable development of urban construction. © ASCE.

关键词： Sustainable development

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Smart adaptive technologies for intelligent transportation systems (ITS): efficient design through BIM integration

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Technological Sustainability 2024年第4期3卷 474-499页

作者： Kuol, Abraham Gharehbaghi, Koorosh Farnes, Ken Tee, Kong Fah McManus, Kerry RMIT University Department of Civil and Environmental Engineering King Fahd University of Petroleum and Minerals Swinburne University of Technology Interdisciplinary Research Center for Construction and Building Materials King Fahd University of Petroleum and Minerals

Purpose: While efficient design in engineering projects is crucial, this paper aims to examine the integration of Building Information Modeling (BIM) into railway Intelligent Transportation Systems (ITS). The paper provides some key understanding of integrating BIM and ITS to improve the efficiency of railway infrastructure projects. Design/methodology/approach: An in-depth qualitative analysis of three ITS case studies was conducted to understand BIM’s global impact and benefits in railway infrastructure projects. While case study one investigated the Crossrail (UK), the other two case studies were TUC Rail (Belgium) and the Intercity railway network (Norway). Findings: The findings include the specific benefits of BIM, regarding the railway infrastructure. The result indicated that BIM benefits were consistently the same across all case studies. Although Case study 1 was the only one that boasts a high reduction in waste and reworks, all of the case studies showed less rework and delays due to BIM. The results indicated that the advantages of BIM for such projects are cost optimization, reduction in waste, rework and lessening delays. Subsequently, this leads to the ease and efficiency with which structures and railways can be built. The outcomes can ultimately assist transportation planners in better planning and managing railway projects. Practical implications: This study proposes the integration of BIM into railway projects as a part of their ITS. The BIM integration into railway projects as a part of their ITS fits within the overall planning to handover phases. Specifically, the BIM integration improves the design process of typical railway projects. Thus, the most significant advantage of BIM for railway projects is to further improve their design process leading to a higher degree of constructability. Originality/value: Railway infrastructure performs a major role in economic and regional development. The complexity of railway projects continues to increas

关键词： Building information modeling (BIM) Constructability Intelligent transportation systems (ITS) Railways projects

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Laboratory assessment of tensile properties of root-soil composite of Amorpha fruticose

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Journal of Mountain Science 2025年第3期22卷 1062-1074页

作者： TAO Gaoliang YANG Chuanhui CHEN Qingsheng NIMBALKAR Sanjay XIAO Henglin WANG Qing Innovation Demonstration Base of Ecological Environment Geotechnical and Ecological Restoration of Rivers and Lakes Key Laboratory of Intelligent Health Perception and Ecological Restoration of Rivers and LakesMinistry of EducationHubei University of TechnologyWuhan 430068China School of Intelligent Construction Wuchang University of TechnologyWuhan 430223China School of Civil and Environmental Engineering University of Technology Sydney(UTS)Ultimo NSW 2007Australia

Plant root systems serve as a natural reinforcing material,significantly improving soil ***,the tensile strength of soil is crucial in mitigating the formation of ***,this study aims to investigate the influence of plant roots on the tensile strength of *** this investigation,Amorpha fruticose was selected due to its large root diameter and the ease of root *** tensile tests were conducted on individual roots and root-soil complexes under three varying *** results indicate a power law relationship between root diameter and tensile *** root content and dry density notably enhance the tensile strength of the root-soil complex while roots mitigate damage associated with soil *** root content increases from 0 to 10,the maximum enhancement in tensile strength of the root-soil complex reaches 42.3 *** tensile strength of the root-soil complex at a dry density of 1.7 g/cm^(3)is four to five times greater than that of the complex at a dry density of 1.4 g/cm^(3).Moreover,as moisture content increases,the tensile strength of the root-soil complex initially rises before declining,with an increase range of 7.7-35.8 *** findings provide a scientific basis for understanding the role of vegetation roots in soil tensile strength and for guiding slope reinforcement strategies.

关键词： Root soil complex Tensile strength Root content Dry density Moisture content

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Effect of slope angle on fractured rock masses under combined influence of variable rainfall infiltration and excavation unloading

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Journal of Rock Mechanics and Geotechnical engineering 2024年第10期16卷 4154-4176页

作者： Xiaoshuang Li Qihang Li Yunmin Wang Wei Liu Di Hou Chun Zhu School of Urban Construction Changzhou UniversityChangzhou213164China College of Civil Engineering Qilu Institute of TechnologyJinan250200China School of Resources and Safety Engineering Chongqing UniversityChongqing400044China Sinosteel Maanshan General Institute of Mining Research Co.Ltd. Maanshan243000China Guizhou Survey and Design Research Institute for Water Resources and Hydropower Guiyang550001China School of Earth Sciences and Engineering Hohai UniversityNanjing210098China

Intense precipitation infiltration and intricate excavation processes are crucial factors that impact the stability and security of towering and steep rock slopes within mining *** primary aim of this research was to investigate the progression of cumulative failure within a cracked rock formation,considering the combined effects of precipitation and excavation *** study was conducted in the Huangniuqian eastern mining area of the Dexing Copper Mine in Jiangxi Province,*** engineering geological investigation was conducted,a physical model experiment was performed,numerical calculations and theoretical analysis were conducted using the matrix discrete element method(Mat-DEM),and the deformation characteristics and the effect of the slope angle of a fractured rock mass under different scenarios were *** failure and instability mechanisms of the fractured rock mass under three slope angle models were *** experimental results indicate that as the slope angle increases,the combined effect of rainfall infiltration and excavation unloading is reduced.A novel approach to simulating unsaturated seepage in a rock mass,based on the van Genuchten model(VGM),has been *** to the vertical displacement observed in a similar physical experiment,the average relative errors associated with the slope angles of 45,50,and 55were 2.094%,1.916%,and 2.328%,***,the combined effect of rainfall and excavation was determined using the proposed ***,the accuracy of the numerical simulation was *** findings contribute to the seepage field in a meaningful way,offering insight that can inform and enhance existing methods and theories for research on the underlying mechanism of ultra-high and steep rock slope instability,which can inform the development of more effective risk management strategies.

关键词： Open-pit to underground excavation Rainfall infiltration Similarity simulation Numerical simulation Image recognition Slope angle

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