Analysis Of Internal Force And Deformation Of Double-Row Steel Sheet Pile Cofferdam In Different Working Conditions,
2023
CCCC Tunnel Engineering Company Limited, Nanjing, Jiangsu 211100, China
Analysis Of Internal Force And Deformation Of Double-Row Steel Sheet Pile Cofferdam In Different Working Conditions, Yang Qin, Fang Zhongqiang, Liu Yi, Tu Qiliang
Journal of China & Foreign Highway
To understand the internal force and deformation generation mechanism of the double-row steel sheet pile cofferdam in complex stress conditions and determine the most unfavorable working condition, this paper adopted the finite element method to analyze the displacement, axial force of steel tie bars and bending moments of steel sheet piles in various construction stages at different water levels and under different load types. The study shows that the deformation and internal force of the cofferdam are affected by the water level, fill light weight, vertical construction load, horizontal wave load, and wind load. The most unfavorable conditions for displacement …
Design Of Prefabricated Deep-Water Combined Steel Sheet Pile Cofferdam,
2023
Key Laboratory of Large-span Bridge Construction Technology, Ministry of Transport, CCCC Second Harbor Engineering Company Ltd., Wuhan, Hubei 430040, China
Design Of Prefabricated Deep-Water Combined Steel Sheet Pile Cofferdam, Fu Su, Ceng Jian, Yang Suhai, Wang Chao, Deng Songtao
Journal of China & Foreign Highway
By taking the pier bearing platform 9# of the non-navigable bridge in the eastern flood-relief area of Shenzhen-Zhongshan Link as the research project, this paper introduced the cofferdam structure of prefabricated combined steel sheet piles using the support-first construction process from the aspects of the cofferdam structural form, cross-section type of steel sheet piles, construction process, and support system, and adopted the finite element method to numerically analyze the whole cofferdam construction process. The combined cross-section of cap-shaped steel sheet piles and H-shaped steel greatly improves the rigidity of steel sheet piles. Additionally, the construction process of the support-first method …
Performance Analysis Of Steel Bridge Deck Reinforced By Uhpc Based On Fracture Mechanics,
2023
Guangdong Communication Planning & Design Institute Group Co., Ltd., Guangzhou, Guangdong 510080, China
Performance Analysis Of Steel Bridge Deck Reinforced By Uhpc Based On Fracture Mechanics, Long Yiyu, Chen Shuangqing, Tang Chunyan, Peng Yajun, Zhou Zejian
Journal of China & Foreign Highway
At the deck-rib welding joints of orthotropic steel bridge decks, cracking can easily occur under the vehicle load, and the fatigue risk of steel bridge decks can be effectively reduced by UHPC reinforcement. To investigate the effect of UHPC-reinforced steel bridge decks, this paper carried out finite element analysis based on linear-elastic fracture mechanics. By taking the orthotropic steel bridge deck test as the reference, the fatigue performance at the weld toe was calculated, and the reliability of the finite element model was verified. Stress intensity factor calculation analysis was performed by inserting an initial crack at the weld detail, …
Stress Analysis And Monitoring Of Composite Cable Hanging Basket During Construction,
2023
School of Civil Engineering, Suzhou University of Science and Technology, Suzhou, Jiangsu 215011, China
Stress Analysis And Monitoring Of Composite Cable Hanging Basket During Construction, Zhou Su, Li Xinsheng, Liu Chentao, Shao Mingjie
Journal of China & Foreign Highway
Composite cable hanging baskets are also known as front and rear pivot combined hanging baskets. By taking the construction monitoring of a single-tower and double plane cable-stayed bridge as the research project, this paper demonstrated the rationality, practicability and advancement of the composite cable hanging baskets during construction, and carried out modeling analysis of the whole construction stage. Meanwhile, the batch tension values of the construction sections were determined according to the deformation of the hanging basket during the construction stage, and then the theoretical and measured values of the basket’s deformation and stress during the construction stage were analyzed …
Study On Influence Of Overcrossing Construction Of Xingquan Railway Lyugu No .2 Tunnel To Existing Chenba Tunnel Of Fuxia Railway,
2023
Fujian Railway Construction Co., Ltd., China Railway 24th Bureau Group Corporation Limited, Fuzhou, Fujian 350013, China
Study On Influence Of Overcrossing Construction Of Xingquan Railway Lyugu No .2 Tunnel To Existing Chenba Tunnel Of Fuxia Railway, Fan Dequan
Journal of China & Foreign Highway
To study the influence of tunnel crossing construction on the existing tunnel structures, this paper took the overcrossing construction of the existing Chenba tunnel of Fuxia railway of Xingquan railway Lyugu No. 2 tunnel as the research project. By adopting the numerical simulation method of finite element, it studied the change rules of the displacement field and stress field of the existing tunnels affected by the overcrossing construction of the new tunnels. The results show that the influencing range subject to the effect of Lyugu No. 2 tunnel’s excavation on the existing Chenba tunnel is roughly within the range of …
Research On Performance Simulation Of Previous Concrete Considering Characteristics Of Void Structures,
2023
Shandong Luqiao Group Co., Ltd., Jinan, Shandong 250014, China
Research On Performance Simulation Of Previous Concrete Considering Characteristics Of Void Structures, Zheng Shuai, Dan Jingsong, Han Weiwei, Lv Yigang, He Jie, Pei Fucai
Journal of China & Foreign Highway
Pervious concrete contains a large number of macroscopic voids. To analyze the influence of the void structures on the mechanical properties of pervious concrete, this paper adopted the random void method to build a simulation model of pervious concrete, and study the effect of the characteristics of the void structures on the force properties. Firstly, two kinds of pervious concrete specimens with two void content levels were made indoor, and then the specimens were cut after curing and molding. Next, image enhancement and threshold segmentation were conducted on the section images of the cut surfaces, and two-dimensional digital images of …
Study On Frost Resistance And Pore Structure Of Nano-Sio 2 Modified Pavement Concrete Under Fatigue Load,
2023
Guangxi Transport Vocational and Technical College, Nanjing, Guangxi 530000, China
Study On Frost Resistance And Pore Structure Of Nano-Sio 2 Modified Pavement Concrete Under Fatigue Load, Zhou Xuexiang, Zheng Wenshi, Wu Cong
Journal of China & Foreign Highway
To improve the frost resistance of concrete pavement under fatigue load, this paper simulated the freeze-thaw damage of concrete pavement under vehicle load by indoor fatigue loading and alternating freeze-thaw cycling test. Meanwhile, it designed the bending tensile test to test the residual bending tensile strength of nano SiO2-modified pavement concrete after freezing and thawing, and adopted the mercury injection method to test the microscopic pore structures of concrete. Additionally, by employing the electron microscope, the change rules of pores in the concrete under the action of fatigue load were observed, and the effect of nano SiO2 dosage, the number …
Influence Of Natural Environment On The Serviceability Of Emulsified Asphalt Cold Recycled Mixture,
2023
Sichuan Vocational and Technical College of Communications, Chengdu, Sichuan 613000, China
Influence Of Natural Environment On The Serviceability Of Emulsified Asphalt Cold Recycled Mixture, Yang Puxin
Journal of China & Foreign Highway
To improve the early serviceability of emulsified asphalt cold recycled mixtures, this paper studied the effect of curing conditions on the mechanical strength and stability of emulsified asphalt cold recycled mixtures by conducting indoor tests. The results show that in the same test conditions, the indoor emulsified asphalt cold recycled mixture can better characterize the serviceability of practical projects. Compared to the indoor specimen mixture, the stability and cleavage strength of field mixture core samples are increased by an average of 5.5% and 10.7% respectively. Under the curing time of no less than 7 d, the stability, cleavage strength and …
Experimental Study On Recycled Brick Powder Foam Concrete Based On Slurry Substitution Method,
2023
School of Civil Engineering, Changsha University of Science & Technology, Changsha, Hunan 410114, China
Experimental Study On Recycled Brick Powder Foam Concrete Based On Slurry Substitution Method, Liao Shixian, Huang Lei
Journal of China & Foreign Highway
Foam concrete is a kind of porous lightweight building material characterized by sound insulation and noise reduction, heat insulation and fire resistance, heat preservation and frost resistance. However, it has defects such as low strength, high porosity and poor integrity, thus limiting its wide application in the field of building materials. Recycled brick powder can be prepared from construction waste of clay bricks and has certain volcanic ash activity. Meanwhile, the mechanical properties of foam concrete can be improved by employing waste bricks as an admixture in cement-based composite materials. In view of the problems of the cement substitution method, …
Study On Mix Design And Performance Of Permeable Concrete Considering Sand Ratio And Aggregate To Binder Ratio,
2023
Henan Puwei Expressway Co., Ltd., Puyang, Henan 457000, China
Study On Mix Design And Performance Of Permeable Concrete Considering Sand Ratio And Aggregate To Binder Ratio, Wei Yazhou, Ji Rongqing
Journal of China & Foreign Highway
Considering the effect of the sand ratio and aggregate to binder ratio, this paper improved the traditional mix ratio design method-volumetric method, and investigated the influence of the sand ratio, aggregate to binder ratio, and maintenance method on the mechanical properties and permeability coefficient of pervious concrete based on the improved method. The results show that under the sand ratio of 15%, the compressive strength of concrete is significantly increased and the permeability is not affected. When the aggregate to binder ratio is 3.0‒3.1, the compressive strength and permeability coefficient of the concrete can be both considered. Additionally, compared to …
Experimental Study On Mechanical Properties Of Steel-Polypropylene Mixed Fiber Rubber Concrete,
2023
Shanxi Transportation Survey & Design Institute Co., Ltd., Taiyuan, Shanxi 030031, China
Experimental Study On Mechanical Properties Of Steel-Polypropylene Mixed Fiber Rubber Concrete, Qiu Jiandong
Journal of China & Foreign Highway
Waste rubber materials can be recycled to obtain rubber aggregates, which can be employed in cement concrete products. This paper carried out mechanical performance tests on ordinary concrete and rubber concrete (rubber substitution rate of 20%) with different fiber combinations (doped MS, co-doped PP, and mixed MS-PP), and mainly examined the slump, density, compressive strength, modulus of elasticity, split tensile strength, and rupture strength of the concrete. The results show that the relevant performance indexes decrease significantly after 20% of rubber aggregate is added to the concrete. However, the mechanical performance of ordinary concrete and rubber concrete with the combination …
Application Of Bim Forward Design In Complex Three-Dimensional Traffic Design Stage,
2023
CCCC First Highway Consultants Co., Ltd., Xi'an, Shaanxi 710075, China
Application Of Bim Forward Design In Complex Three-Dimensional Traffic Design Stage, Wang Bo, Zhu Xinghu, Pei Wangjian, Ge Puta
Journal of China & Foreign Highway
To improve the accuracy and efficiency of complex three-dimensional traffic design, and provide basic digital data for the whole life cycle, this paper researched and investigated the application of BIM technology in the complex three-dimensional traffic design stage by taking the convergence project of the Qianhai section of Shenzhen Coastal Expressway and Nanping Expressway in Guangdong as a case study. Meanwhile, it put forward the BIM forward design schemes for the fields of roads, bridges, and tunnels, carried out secondary development, and built the three-dimensional parametric model, with the design results optimized. Additionally, design analysis and application were conducted to …
Research On Interchange Reconstruction Design Of Minxiao Hub,
2023
CCCC Second Highway Consultants Co., Ltd., Wuhan, Hubei 430056, China
Research On Interchange Reconstruction Design Of Minxiao Hub, Hu Tian, Tan Ximing, Yi Xuebin, Wei Hui
Journal of China & Foreign Highway
Based on the design of the Minxiao hub interchange, this paper analyzed the technical problems of frequent traffic accidents after the initial reconstruction of Minxiao hub interchange, and put forward corresponding reconstruction suggestions. In the interchange design details, the design points about the dual lanes adopting single lanes and speed change lanes only put forward the distance requirement of 60 m for the transition sections, but whether the gradual changes of the travel lanes and hard shoulders are completed in the same road section or not is not clarified. The initial reconstruction of Minxiao hub interchange is designed to complete …
Exploring Long-Term Protective Effect Of High Vertical Sand Barrier On Top Of Complex Longitudinal Sand Ridge In Taklamakan Desert,
2023
Foshan University, Foshan, Guangdong 528000, China
Exploring Long-Term Protective Effect Of High Vertical Sand Barrier On Top Of Complex Longitudinal Sand Ridge In Taklamakan Desert, Jin Changning
Journal of China & Foreign Highway
By taking the high vertical sand barriers deployed on the top of the complex longitudinal sand ridges in the hinterland of Taklamakan Desert as the object, this paper investigated the sand protection effect from the long-term perspective on the basis of several years’ comparative observation. The result analysis shows that in addition to the recognized sand blocking effect, high vertical sand barriers also have a more important role of sand fixation, which means that the barriers can change the original overall movement of sand dunes into only the falling sand slope forward, with the windward slopes basically fixed. Even if …
Study And Implementation Of Jacking Scheme Of Vertical Curve Beam With Two -Way Longitudinal Slope Without Adjusting Temporary Pier Top Elevation,
2023
CCCC Changsha Construction Co., Ltd., Changsha, Hunan 410200, China
Study And Implementation Of Jacking Scheme Of Vertical Curve Beam With Two -Way Longitudinal Slope Without Adjusting Temporary Pier Top Elevation, Zhang Hongwu, Ke Hongjun, Chen Zhuoyi, Yang Wu
Journal of China & Foreign Highway
The bridge alignment design is the straight line+circular curve+straight two-way longitudinal slope vertical curve variable curvature steel bridge jacking. To deal with this problem, this paper analyzed the shortcomings of existing schemes such as real-time or multiple adjustments to the temporary pier top elevation, and proposed a jacking scheme of taking full advantage of the steel bridge’s characteristics including small flexural rigidity, strong adaptive deformation ability and high material strength, without adjusting the temporary pier top elevation. Additionally, the whole-process finite element simulation analysis was conducted on this scheme via a background project, with the calculation results revealing safety and …
Data Analysis And Early Warning Platform For Bridge Health Monitoring Based On Matlab-Java Fusion,
2023
Shenzhen High Speed Engineering Consulting Co., Ltd., Shenzhen, Guangdong 518000, China
Data Analysis And Early Warning Platform For Bridge Health Monitoring Based On Matlab-Java Fusion, Wang Zhiwen, Mao Yongjia, Ding Youliang
Journal of China & Foreign Highway
Bridge health monitoring provides important support for daily operation and maintenance management of bridges. Meanwhile, real-time analysis, evaluation and early warning of bridge health monitoring data are the core requirements for enhancing bridge monitoring and safety protection, which can help grasp the operation status of bridge structures in real time and guard against major safety risks of bridge operation. This paper combined traditional signal processing and statistical analysis with modern machine learning and deep learning, and developed a platform for real-time analysis and warning of bridge health monitoring data based on Matlab-JAVA integration. Online cleaning, feature extraction, performance evaluation and …
Application Of Dry Sbs Modification Technology In Yanhai Highway,
2023
Jiangsu Eastern Expressway Management Co., Ltd., Yancheng, Jiangsu 224000, China
Application Of Dry Sbs Modification Technology In Yanhai Highway, Zhang Han, Meng Chunlin, Zhao Mingfang, Lu Chuanzhong, Ji Guoqi
Journal of China & Foreign Highway
Dry SBS-modified asphalt pavement technology is to produce SBS-modified asphalt mixtures by adding specific SBS modifiers, which aims to solve the performance degradation of SBS-modified asphalt in transportation and storage. By relying on the coastal highway repair projects, this paper compared the effects of different dry SBS mixing contents on the test results by the indoor dry SBS and matrix asphalt compatibility test and asphalt mixture performance evaluation test. Meanwhile, based on the test results, the recommended dry SBS mixing content for the coastal highway upper layer milling and resurfacing maintenance project was proposed and applied on a large scale …
Analysis Of Factors Affecting Construction And Demolition Waste Reduction In Egypt,
2023
The British University in Egypt
Analysis Of Factors Affecting Construction And Demolition Waste Reduction In Egypt, Ayman Ahmed Ezzat Othman, Ahmed Osama Daoud, Obas John Ebohon, Ali Bayyati
Architectural Engineering
Construction projects are associated with construction and demolition waste (CDW) generated at different stages. In Egypt’s case, the CDW problem has become a significant challenge, and the need to find sustainable solutions is overwhelming. Based on recent investigations in the literature, it was found that six main factors are affecting CDW reduction (CDWR) as follows: (1) waste-efficient materials procurement measures; (2) waste-efficient materials procurement models; (3) green materials procurement approach; (4) legislation; (5) culture & behaviour; and (6) awareness. In this study, a representative sample of Egyptian construction firms was screened to (1) investigate the applicability and effectiveness of CDWR …
Data-Driven Analysis Of Construction Bidding Stage-Related Causes Of Disputes,
2023
Missouri University of Science and Technology
Data-Driven Analysis Of Construction Bidding Stage-Related Causes Of Disputes, Muaz O. Ahmed, Islam H. El-Adaway
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Construction bidding is a complex process that involves several potential risks and uncertainties for all the stakeholders involved. Such complexities, risks, and uncertainties, if uncontrolled, can lead to the rise of claims, conflicts, and disputes during the course of a project. Even though a substantial amount of knowledge has been acquired about construction disputes and their causation, there is a lack of research that examines the causes of disputes associated with the bidding phase of projects. This study addresses this knowledge gap within the context of infrastructure projects. In investigating and analyzing the causation of disputes related to the bidding …
Bim And Digital Twins In Infrastructure Projects: An Overview From The Transportation Professional's Perspective,
2023
Louisiana State University
Bim And Digital Twins In Infrastructure Projects: An Overview From The Transportation Professional's Perspective, Natállia Mendes
LSU Master's Theses
Transport infrastructure has undergone significant changes in recent years due to the digitalization of construction methods. Consequently, there is an increasing demand for more productive and cost-effective technologies to optimize various aspects such as time, cost, changes, waste, and errors in projects. Notably, technologies such as Building Information Modeling (BIM) and Digital Twin (DT) hold the potential to enhance the performance of infrastructure projects. While BIM has received substantial attention in recent years, Digital Twin is relatively new to the construction industry. This leads to a scarcity of studies on DT and its integration with other emerging technologies like BIM. …
