Analysis Of Asphalt Pavement Structure Based On Master Curve Parameters Of Dynamic Modulus Of Asphalt Mixture,
2024
Engineering Research Center of Catastrophic Prophylaxis and Treatment of Road & Traffic Safety of Ministry of Education , Changsha University of Science & Technology , Changsha , Hunan 400114 , China ;School of Traffic and Transportation Engineering , Changsha University of Science & Technology , Changsha , Hunan 400114 , China
Analysis Of Asphalt Pavement Structure Based On Master Curve Parameters Of Dynamic Modulus Of Asphalt Mixture, Liu Zhaohui, Yang Xin, Huang You, Liu Li
Journal of China & Foreign Highway
In order to study the effect of the change in the master curve parameters of the dynamic modulus of asphalt mixture and the interaction on the structural response of asphalt pavement,a three-dimensional model of the asphalt pavement structure was established using the finite element method,and the structural calculations of asphalt pavement with semi-rigid base and flexible base were carried out.The master curve parameters of the dynamic modulus δ,α,β,and γ were taken as the influencing factors,and the maximum tensile strain at the bottom of the asphalt layer and the vertical compressive strain at the top of the subgrade were set as …
Mechanism Of Water‑Damaged Landslides Of Embankments And Comparison Of Reinforcement Measures,
2024
Anhui Transport Consulting & Design Institute Co ., Ltd., Hefei , Anhui 230088 ,China ;Highway Traffic Energy Saving and Environmental Protection Technology Transportation Industry R&D Center ,Hefei , Anhui 230088 ,China
Mechanism Of Water‑Damaged Landslides Of Embankments And Comparison Of Reinforcement Measures, Hu Minghua, Zhang Baiyong, Xu Kui
Journal of China & Foreign Highway
Water damage to embankments serious ly affects the normal operation of highways,so it is extremely important to ensure the stability of the embankment.In addition,it is necessary to analyze the mechanism and study the safety control measures for water-damaged landslides of the embankment.A highway subgrade embankment was studied,and the causes and formation mechanism of the landslide were qualitatively analyzed based on the on-site deformation monitoring and stability calculation.Then,the stability coefficients of different reinforcement schemes were calculated.An appropriate reinforcement scheme was recommended by considering the project cost,construction technology,and construction period.The results indicate that uneven settlement of the embankment stratum is the fundamental …
Meso-Mechanical Properties Of Bearing Ratio Of Waste Lime‑Fly Ash Macadam And Soil Mixture Based On Discrete Element,
2024
Kunshan Transportation Development Holding Group Co ., Ltd., Suzhou , Jiangsu 215335 ,China
Meso-Mechanical Properties Of Bearing Ratio Of Waste Lime‑Fly Ash Macadam And Soil Mixture Based On Discrete Element, Zhang Xiaofei, Chen Yuru, Zhang Song, Gao Lei, Tian Angran, Tang Qiang
Journal of China & Foreign Highway
In the process of applying construction waste to subgrade,the bearing capacity of the material has an important impact on the service performance of roads.In order to evaluate the meso-mechanical properties of construction waste used as subgrade filler,the bearing ratio test of waste lime-fly ash macadam and soil mixture with different stone contents was carried out by using discrete element software.The strength formation mechanism was revealed by using the discrete element method.The results show that the bearing ratio of the mixture increases with the increase in the stone content and reaches the maximum value when the stone content is 80%.In the …
Review On Lcca And Lca Methods For Pavement Based On Bim,
2024
College of Transportation and Civil Engineering , Fujian Agriculture and Forestry University , Fuzhou , Fujian 350004 , China
Review On Lcca And Lca Methods For Pavement Based On Bim, You Shengjie, Hu Yonggang, Liu Xinsuo, Zheng Xiaoyan
Journal of China & Foreign Highway
Currently,life cycle cost analysis (LCCA ) and life cycle assessment (LCA ) methods are commonly used to assess the economic and environmental impacts of pavement during the whole life cycle.However,there are drawbacks in the application of LCCA and LCA methods,such as a large amount of data and multiple data categories,which lead to a tedious evaluation process.In view of this,some scholars have tried to combine building information modeling (BIM ) with LCCA and LCA methods to optimize the evaluation process.In the pavement field,the combination of LCCA and LCA with BIM is still in its infancy,lacking a summary of relevant research results.Therefore,this …
Anti‑Freezing Performance Of Cement-Stabilized Mixture For Recycled Aggregate From Solid Construction Waste,
2024
China Road & Bridge Corporation , Beijing 100011 , China ;East Africa R&D Center , China Communications Construction Company Ltd , Nairobi 999070 , Kenya
Anti‑Freezing Performance Of Cement-Stabilized Mixture For Recycled Aggregate From Solid Construction Waste, Zheng Jiajia, Zhang Laijun, Wang Xihui, Xie Jianwei, Chen Zhiyong
Journal of China & Foreign Highway
This paper investigated the effects of particle size and content of recycled aggregate on the anti-freezing performance of cement-stabilized recycled aggregate mixture,so as to provide a reference for the fine utilization of recycled aggregate with different particle sizes.The basic performance indexes of recycled aggregates with different particle sizes were tested,and the optimum moisture content and maximum dry density were determined by compaction test.The specimens were prepared with 4% cement content,and the anti-freezing performance of the mixture was evaluated by testing the unconfined compressive strength loss of the mixture after the freeze-thaw cycle.The results show that the optimum moisture content increases,and …
Experimental Study On Road Performance Of Resin Elastomer For Seamless Expansion Joints Of Bridges,
2024
Jiangsu Communications Engineering Construction Bureau , Nanjing ,Jiangsu 211899 , China
Experimental Study On Road Performance Of Resin Elastomer For Seamless Expansion Joints Of Bridges, Zhou Wei, Sheng Liang, Gao Qin, Zhang Hui, Zhao Menglong
Journal of China & Foreign Highway
Seamless expansion joint is a new type of bridge expansion joint.In order to study the road performance of resin elastomer for seamless expansion joints,the feasibility of applying resin elastomer to small and medium displacement expansion joints of bridges was explored.Through the rutting test at 60 ℃, low-temperature beam bending test at −10 ℃,dynamic modulus test,Poisson's ratio test,and overlay test (OT),the high and low temperature stability,deformation performance,and fatigue crack resistance of the resin elastomer were compared.The test results show that the dynamic stability of the resin elastomer at 60 ℃ is more than 31 000 times/mm,and the bending strain at low …
Experimental Study On Adhesive Pe Rformance Of Second-Order Thermosetting Epoxy Asphalt In Bridge Deck Pavement,
2024
Yichang Transportation Authority , Yichang , Hubei 443000 , China
Experimental Study On Adhesive Pe Rformance Of Second-Order Thermosetting Epoxy Asphalt In Bridge Deck Pavement, Zhou Changdong, Dai Mingjing, Zhao Mingyu, Li Zhiqiang, Lei Yuxiang, Ding Qingjun
Journal of China & Foreign Highway
Based on the Wujiagang Yangtze River bridge project in Yichang,the interfacial shear strength and pull-out strength of the second-order thermosetting epoxy asphalt material between RA asphalt concrete and high viscoelastic SMA asphalt concrete in pavement structure were studied under different spraying amount,different first-stage curing time,different curing time,and different service temperatures.In addition,the influence of spraying amount on shear fatigue resistance was studied.The results show that with the increase in the spraying amount of the second-order thermosetting epoxy asphalt,the adhesive performance and shear strength are improved,and the shear fatigue resistance of the structure is enhanced.At a construction ambient temperature of 25‒35 ℃,the …
Design And Key Technologies Of Bridges With Long‑Cantilever Closed Steel Box Composite Girder,
2024
Shanxi Transportation Science Highway Survey and Design Institute Co ., Ltd., Taiyuan ,Shanxi 030032 , China ;Shanxi Transportation Survey & Design Institute Co .,Ltd., Taiyuan ,Shanxi 030032 , China
Design And Key Technologies Of Bridges With Long‑Cantilever Closed Steel Box Composite Girder, Ji Jiandong, Wang Bin
Journal of China & Foreign Highway
In order to meet the span requirements of bridges over the Yellow River and reduce the interference of temporary construction facilities on flood discharge from the Yellow River,the Linyi Yellow River Bridge was studied.The main bridge adopted a continuous long-cantilever closed steel box composite girder of (112 + 28 × 128 + 120) m and was divided into two parts,with the maximum length of the parts being 1 912 m.The steel box composite girder was constructed by incremental launching method without temporary piers,and the bridge deck was installed after the closed steel box girder was in place.The installation sequence of …
Supporting Capacity Anal Ysis And Construction Scheme Optimization Of Support System For Cast‑In‑Situ Box Girders In High‑Pier Wading Bridges,
2024
Faculty of Civil Engineering and Mechanics , Kunming University of Science and Technology , Kunming ,Yunnan 650500 , China
Supporting Capacity Anal Ysis And Construction Scheme Optimization Of Support System For Cast‑In‑Situ Box Girders In High‑Pier Wading Bridges, Guo Tao, Yao Yuchen, Ma Hongze, Huang Xiaomin, Zhang Yongchun
Journal of China & Foreign Highway
Although a concrete bridge su pport system is a temporary structure,it still has a supporting capacity.With the development of bridge engineering,concrete bridges with high piers and long spans are gradually applied in deep reservoir areas,and the forces on scaffolding are more and more complex.Traditional manual calculations in structural mechanics can no longer completely reflect the stress-strain states of scaffolding with irregular configurations,special parts,and uncommon conditions.Thus,it is necessary to use a numerical method to calculate the supporting capacity of scaffolding and design construction schemes.This paper took a concrete wading bridge with high piers as an example.An evaluation method based on the …
A Rapid Test Method For Deflection Of Small And Medium‑Span Bridges,
2024
China Railway Development and Investment Group Co ., Ltd., Kunming , Yunnan 650200 , China
A Rapid Test Method For Deflection Of Small And Medium‑Span Bridges, Zhang Aipin, Ma Lindong, Chang Zhugang, Fan Zhihao
Journal of China & Foreign Highway
Bridge deflection response is on e of the most important indicators used for structural condition assessment of bridges.There are currently many methods and devices for deflection measurement,but they are not satisfying in terms of economy,applicability,and measurement accuracy at the same time.This paper proposed a rapid and highly accurate method for measuring mid-span deflection of small and medium-span bridges.By using the high accuracy of displacement transducers in direct contact measurement,an auxiliary measurement device was developed to transfer the deflection of the measurement points on the bridge to the displacement transducer in the form of a rigid connection,thus achieving accurate and dynamic …
Numerical Simulation Of Mechanical Performance For Anti‑Collision Steel Pontoon,
2024
China Construction Fifth Engineering Division Co ., Ltd., Changsha , Hunan 410002 , China
Numerical Simulation Of Mechanical Performance For Anti‑Collision Steel Pontoon, Han Xiaolei, Wang Bo, Li Weidong
Journal of China & Foreign Highway
Anti-collision steel pontoo n has good plasticity and energy absorption properties in ship-bridge collision.To explore the factors affecting the anti-collision performance of the anti-collision pontoon,a collision model composed of ship,anti-collision pontoon,and pier system was built based on finite element software Ansys/LS-DYNA.The collision mechanism and process were numerically simulated,and the effects of connection type between anti-collision pontoon and pier,peak angle of pontoon,and anti-collision pontoon stiffness on the collision force of the pier were investigated.The three-stage division method of collision force curve was put forward.The analysis shows that the fixed inwall of the anti-collision steel pontoon and connection to the pier surface …
Deformation And Damage Characteristics Of A Newly Operated Tunnel Caused By Above Foundation Pit Construction,
2024
China Railway Southern Investment Group Co ., Ltd., Shenzhen , Guangdong 518060 , China
Deformation And Damage Characteristics Of A Newly Operated Tunnel Caused By Above Foundation Pit Construction, Liu Jiqiang, Zhu Min, Hao Kun, Chen Dengwei, Chen Xiangsheng
Journal of China & Foreign Highway
The construction of foundation pits in granite residual soil layers is prone to causing upheaval deformation and structural damage in shield tunnels below.Based on the engineering case of a newly operated metro tunnel collinear with the above long-distance deep foundation pit in Shenzhen,a three-dimensional finite element model was established to investigate the variation law of the heave and horizontal convergence of the shield tunnel caused by the deep foundation pit excavation.The correlation between the longitudinal stress of the lining structure and the damage was analyzed.The results indicate that the tunnel deformation caused by foundation pit unloading is primarily vertical heave,accompanied …
Dynamic Response Rules Of Adjacent Buildings To Blasting Construction In Shallow Buried Tunnels,
2024
Sichuan Chuanjiao Road and Bridge Co ., Ltd., Guanghan , Sichuan 618300 , China
Dynamic Response Rules Of Adjacent Buildings To Blasting Construction In Shallow Buried Tunnels, Luo Yanping, Li Jigang, Wang Sheng, Zeng Bin, Lai Jinxing, Feng Zhihua, Qiu Junling
Journal of China & Foreign Highway
In order to study the dynamic response rule of overlying buildings during blasting construction in shallow buried tunnels,the urban tunnel in Fuzhou was taken as the engineering background,and the on-site monitoring and Ansys/LS-DYNA simulation were used to analyze the structural response of overlying buildings.The monitoring results show that the building is most obviously affected by blasting in the vertical direction and has an obvious elevation amplification effect,and the maximum vibration velocity is 2.45 cm/s.The vibration velocity in all directions gradually decreases and tends to be stable with the increase in explosion center distance and decays rapidly when the explosion center …
Deflection Basin Characteristics Of Distressed Roads Under Moving Load,
2024
Yellow River Laboratory , Zhengzhou University , Zhengzhou , Henan 450001 , China
Deflection Basin Characteristics Of Distressed Roads Under Moving Load, Cai Yingchun, Xie Shenjian
Journal of China & Foreign Highway
The deflection basins of roads under moving load imply the distress information of subgrade and pavement.Therefore,how to use the information of deflection basins under moving load to rapidly test road distresses non-destructively has received much attention.In this paper,the finite element model of semi-rigid base asphalt pavement was established.By setting different types and degrees of finite element distress models,the continuous changes of surface deflection basins under moving load were analyzed.The results show that when the load moves to the distress area,the center deflection value of surface deflection basins in each distress model will become larger.When transverse cracks appear in the pavement …
Curing Mechanism And Influencing Factors Of Cement Mixing Piles Reinforcing Peat Soil,
2024
The First Engineering Company of CCCC Fourth Harbor Engineering Co ., Ltd., Guangzhou , Guangdong 510450 , China
Curing Mechanism And Influencing Factors Of Cement Mixing Piles Reinforcing Peat Soil, Feng Rongxian, Zhong Gaibing, Liu Liang, Liang Jianyuan, Gu Meixiang
Journal of China & Foreign Highway
The cement mixing pile is used to reinforce the deep peat soil foundation in Malaysia's east coast railway construction.The key in this project is to determine the cement mix proportion and additives.Considering the high organic matter content and strong environmental acidity of coastal peat soil,physical and mechanical tests of peat soil and laboratory uniaxial compression tests of cement soil under different mix proportions and influencing factors were conducted.Test results show that the mean compressive strength decreases by 0.35 MPa with the increase in cement-water from 0.5 to 0.9.Adding mineral powder gives a relatively poor curing effect while adding fly ash …
Safety Of Optimized Concrete Median Barrier Without Planting Soil,
2024
Guangdong Provincial Freeway Co .,Ltd., Guangzhou ,Guangdong 510660 , China
Safety Of Optimized Concrete Median Barrier Without Planting Soil, Zhong Chunyao, Ma Qing, Li Yangfan, Gong Shuai, Liu Siyuan, Yan Shuming
Journal of China & Foreign Highway
In order to study the safety of optimized concrete median barrier without planting soil,the technology combining computer simulation,sled test,and full-scale impact test of real vehicles was adopted for analysis and verification.In addition,a scheme was proposed to improve the anti-overturning ability of the barrier without planting soil by strengthening the supporting block,and the scheme of setting a 20 cm-high supporting block between the barrier walls was optimized.The safety of the barrier scheme was evaluated by taking the most unfavorable large truck as an example.The results show that the protection level of the optimized concrete median barrier without planting soil is SAm, …
Aided Design Method And Application Of Rutting Prevention And Maintenance In Asphalt Pavement Based On Digital Holographic 3d Detection,
2024
Guangdong Jiaoke Technology R&D Co ., Ltd., Guangzhou ,Guangdong 510550 , China
Aided Design Method And Application Of Rutting Prevention And Maintenance In Asphalt Pavement Based On Digital Holographic 3d Detection, Wang Jingfei, Wang Wang, Xu Xinquan, Huang Zhijian, Ti Jing, Yao Yanru
Journal of China & Foreign Highway
As one of the common diseases of asphalt pavement,rutting has significant impacts on the service life and traffic safety of the pavement.Mild rutting in asphalt pavement during preventive maintenance can lead to increased use of maintenance materials due to rutting deformation.Accurately calculating the amount of materials needed to fill rutting in maintenance designs is of great significance for ensuring maintenance quality and efficiency.Based on the requirements of maintenance engineering,this paper analyzed the problems in maintenance designs that use traditional methods and the data they generate for rutting detection.A design method was proposed for rutting prevention and maintenance in asphalt pavement,assisted …
Success Factors Analysis In Sorong-Manokwari Railway Infrastructure's Project Evaluation With Fuzzy Ahp Method,
2024
Universitas Indonesia, Faculty of Engineering, Civil Engineering Department
Success Factors Analysis In Sorong-Manokwari Railway Infrastructure's Project Evaluation With Fuzzy Ahp Method, Flora Tresia Wehelmina Kambuaya, Ayomi Dita Rarasati
Smart City
An infrastructure project is a long-term project that has two consequences in the form of uncertainty related to risk and expansive costs. Are infrastructure projects a good long-run stimulus to growth economy? Particularly for new developing areas like Papua island where project preparation evaluation has to be established in order to implement the project. Railway infrastructure is a project initiated in 2018 by Indonesia President and is currently still under administration processing. As a new incubator project, the first train project in Papua Land contains several factors that may be essential to drive project success. The critical success factors as …
Evaluation Of Insurance Policies In The Saudi Arabian Construction Contracts,
2024
The British University in Egypt
Evaluation Of Insurance Policies In The Saudi Arabian Construction Contracts, Ahmed Gouda Mohamed
Civil Engineering
The construction sector is more complicated and prone to risk than many other industries due to the size of the projects and the financial capital involved. Arranging insurance is the prudent course of action for risk management in the construction sector. There is a lack of clarity in insurance policies for public construction projects in the Kingdom of Saudi Arabia (KSA), which poses additional risks to all involved contracting parties. The aim of this research is to evaluate insurance policies in the KSA's public construction projects to identify the key deficiencies and obstacles and provide a road map for improvement …
Mitigating Uncertainty: Analyzing The Role Of Risk Management In The Construction Industry,
2024
Harrisburg University of Science and Technology
Mitigating Uncertainty: Analyzing The Role Of Risk Management In The Construction Industry, Mike Nwafor
Harrisburg University Dissertations and Theses
The construction industry, inherently dynamic and complex, faces a myriad of uncertainties that can significantly impact project outcomes. In this context, effective risk management emerges as a critical component in ensuring project success and sustainability. This abstract explores the role of risk management in the construction industry, highlighting its multifaceted impact on project timelines, costs, and overall quality. Risk management in construction includes detecting, assessing, and managing possible hazards and opportunities throughout the project's life cycle. It includes a proactive approach to anticipating, analyzing, and responding to uncertainties driven by factors such as design modifications, material shortages, labor concerns, weather …
