Numerical Simulation Study On Scour Erosion Of Bridge Pile Foundations In Service,
2025
Ankang City Transportation Bureau , Ankang , Shaanxi 725000 , China
Numerical Simulation Study On Scour Erosion Of Bridge Pile Foundations In Service, Wang Shang, Mi Jiangchuan, Chen Mingtao, Song Dan, Zhang Qiao, Zhang Yong, Wang Weixiao
Journal of China & Foreign Highway
Bridge pile foundations in servic e are subjected to long-term scour erosion caused by sediment-laden water flow,leading to a gradual expansion of the eroded and worn areas.This in turn results in varying degrees of damage to the pile foundation structure and reduces the durability and safety of the bridge.In order to study the impact of scour erosion on bridge pile foundations,this study took the Hanjiang No.1 Bridge in Ankang City as the research object.The ANSYS FLUENT software was used to conduct three-dimensional numerical simulations of the pile foundation and analyze the distribution characteristics and patterns of scour erosion under different …
Research On Influence Of Shield Synchronous Grouting Parameters On Surface Deformation,
2025
Changsha Metro Group Co ., Ltd., Changsha , Hunan 410000 , China
Research On Influence Of Shield Synchronous Grouting Parameters On Surface Deformation, Luo Xu, Zhang Zhaofeng, Fu Helin, Cao Guiqian, Zhao Chuanming
Journal of China & Foreign Highway
In order to determine reasonable grouting parameters,control surface settlement,and reduce the risk of excessive surface settlement caused by irrational synchronous grouting parameters,this study studied the shield tunnel project between maglev T 2 station and maglev T 3 station.A numerical simulation method was adopted to study the influence of grouting pressure,grouting volume,and the elastic modulus of slurry on surface deformation.The results show that the tunnel synchronous grouting has a significant effect on surface settlement control.A greater grouting pressure,equivalent grouting layer thickness,and elastic modulus of slurry mean a smaller surface settlement.As the three parameters increase,the variation range of surface settlement decreases and …
Intelligent Vehicle Path Tracking Control Integrating Road Adhesion Constraints,
2025
School of Mechanical Engineering , Southeast University , Nanjing , Jiangsu 211189 , China ;China Automotive Technology and Research Center Co ., Ltd ., Tianjin 300300 , China
Intelligent Vehicle Path Tracking Control Integrating Road Adhesion Constraints, Zhang Zhiguo, Wang Pu, Zhang Xinglong, Wang Yan
Journal of China & Foreign Highway
In the field of fault-tolerant control for intelligent vehicle path tracking,the existing methods based on model predictive control (MPC ) have limitations.They often assume that the vehicle model parameters are fixed and ignore the impact of dynamic changes in model parameters,which are caused by factors such as vehicle load changes and external environmental interference,on the path tracking accuracy.When the steering system fails,the front wheel steering angle commands calculated by MPC cannot be directly executed and need to be converted into yaw moment control.Although the existing sliding mode yaw moment control methods have strong robustness,the chattering problem affects the stability and …
Research On Parametric Method Of Highway Bim Based On Digital Delivery,
2025
CCCC Second Highway Consultants Co ., Ltd.,Wuhan ， Hubei 430056 , China
Research On Parametric Method Of Highway Bim Based On Digital Delivery, Li Jinlong, Wang Xinnan
Journal of China & Foreign Highway
By analyzing the application points and the current situation of digital delivery in each stage of highway engineering construction,this study found that the lack of parameter management and definition in the modification and refinement process of building information modeling (BIM ) source files at each stage led to difficulties in the splitting and refinement of BIM at each stage and even the need for reconstruction.To this end,a method for strengthening the overall planning of the whole life cycle was proposed.By clarifying the demand for model parameters according to the application points of each stage,a mechanism for parameter reservation and classification …
Reconstruction Plan Of Small-Spacing Interchange Connection Sections On Expressway : A Case Study Of Xinlong‒Gangkou Interchange On Zhongshan‒Jiangmen Expressway,
2025
Guangdong Communication Planning & Design Institute Group Co .,Ltd., Guangzhou , Guangdong 510440 , China
Reconstruction Plan Of Small-Spacing Interchange Connection Sections On Expressway : A Case Study Of Xinlong‒Gangkou Interchange On Zhongshan‒Jiangmen Expressway, Jie Qiang, Fu Xinsha
Journal of China & Foreign Highway
The plan design for the small-spacing interchange connection on the expressway directly affects operational efficiency and driving safety.To achieve the conversion of traffic flow between different expressways,this study explored the reconstruction plan of the connection section under the condition that the interchange spacing did not meet the Design Specification for Highway Alignment (JTG D20‒2017 ) and investigated two connection schemes,including auxiliary lane and collector-distributor lane by taking the Xinlong –Gangkou interchange of the Zhongshan‒Jiangmen Expressway reconstruction and expansion project as an example.The results show that the auxiliary lane is recommended in consideration of the long-term service level,speed coordination,operational efficiency,and engineering …
Design Of Champlain Bridge In Canada,
2025
China Design Group Co . Ltd., Nanjing , Jiangsu 210014 , China
Design Of Champlain Bridge In Canada, Xie Yaning, Zhou Yanfeng, Marwan Nader
Journal of China & Foreign Highway
The Champlain Bridge,an iconic gateway spanning the St.Lawrence River in Montreal,showcases not only the excellence of engineering but also becomes an integral part of the city ’s landscape.With a main span of 240 m,the bridge employs a unique single-pylon harp-shaped double-plane cable-stayed structure.The upper pylon is inspired by a tuning fork in its lateral design,while the upper crossbeam artfully mimics the shape of a bow tie,endowing the bridge with a visual beauty that harmoniously blends elegance and strength.The bridge deck,with a total width of 60 m,was the widest double-plane cable-stayed bridge in the world when it was completed.The typical spans …
Research On Bridge Jacking Decision Based On Carbon Emission Analysis,
2025
Guangdong Provincial Highway Construction Co ., Ltd., Guangzhou , Guangdong 510000 , China
Research On Bridge Jacking Decision Based On Carbon Emission Analysis, Zhang Xinmin, Hu Chengze, Gao Hongbo, Yang Yunping, Sun Zhihong, Cao Hongyou
Journal of China & Foreign Highway
To lift the longitudinal section of existing bridges in highway reconstruction and expansion projects due to insufficient under-bridge clearance,this study took the reconstruction of a 32.5 m T-beam bridge in the reconstruction and expansion project of the Guangzhou‒Shenzhen Expressway as the research object.By using a carbon emission factor method,carbon emissions of three reconstruction schemes,including broken-column jacking,conversion of bearing pads into bridge piers,and demolition and reconstruction,were calculated under different lifting heights,and the corresponding construction and installation costs were compared.The results show that when the longitudinal section of the bridge is lifted to a certain height,the economic benefits of the broken-column jacking …
Research On Rc-Uhpc Composite Slab Frame Culvert Technology In Wave-Affected Areas,
2025
Fujian Communications Planning & Design Institute Co ., Ltd., Fuzhou , Fujian 350000 , China ;Research and Development Center of Transport Industry of New Materials , Technologies Application for Highway Construction and Maintenance of Offshore Areas , Fuzhou , Fujian 350000 , China
Research On Rc-Uhpc Composite Slab Frame Culvert Technology In Wave-Affected Areas, Qiu Junfeng
Journal of China & Foreign Highway
To address the problems in the construction of offshore bridges and culverts such as the structures susceptible to waves,limited layout,and high cost of soft foundation treatment,this paper proposed a new technical solution for reinforced concrete and ultra-high performance concrete (RC-UHPC ) composite slab frame culverts.With supporting engineering,the ordinary box culvert was selected as a comparison scheme for technical and economic analysis,and the design points and construction procedures of new structures were introduced.Based on the calculation results of the overall bearing force,the bearing performance of the top slab under different load conditions was analyzed,along with an investigation of the secondary internal …
Inverse Analysis Of Thermal Parameters Of Concrete Box Girder Based On De-Bp Neural Network,
2025
China National Chemical Construction Investment Co ., Ltd., Beijing 102308 , China
Inverse Analysis Of Thermal Parameters Of Concrete Box Girder Based On De-Bp Neural Network, Yao Yong, Yan Yu, Sun Bo Wen, Wang Yuesong, Jiang Tianyong
Journal of China & Foreign Highway
In view of temperature cracks in concrete box girders easily occurring during construction,an inverse analysis method based on uniform design theory and differential evolution back propagation (DE-BP ) neural network was proposed to accurately obtain the thermal parameters of concrete box girders and ensure the reliability of temperature analysis of concrete box girders.This method established the nonlinear relationship between the temperature peak of characteristic points and the thermal parameters through the DE-BP neural network.By using the uniform design method and the Abaqus finite element numerical model,130 sets of sample data were generated.Based on the ratio of 12∶1 for training samples …
Field Test Research On Optimization Of Smooth Blasting Parameters Based On Drilling Speed,
2025
CCCC Central-South Engineering Company Ltd ., Changsha , Hunan 410000 , China
Field Test Research On Optimization Of Smooth Blasting Parameters Based On Drilling Speed, Wang Haitao, Lu Jianghua, Liu Yang, Huang Mingli, Wu Xuan
Journal of China & Foreign Highway
This study aims to address poor adaptability and timeliness in the design of smooth blasting hole parameters in t he past.With the drilling and blasting method-based construction of large cross-section tunnels in Botanggou and Tielugou along the Zunhua‒Qinhuangdao Expressway as the research background and Ⅲ and Ⅳ grade surrounding rocks of porphyritic granite as the research object,statistical regression analysis and theoretical derivation were conducted on the measured data during on-site drilling according to the rock solidity coefficient.Based on this,a simple parameter design method for a smooth blasting layer based on the drilling speed index of an air leg anchor rod …
Distribution Characteristics Of Internal Distress And Maintenance Decision-Making For Asphalt Pavement Based On Three-Dimensional Ground-Penetrating Radar,
2025
School of Traffic & Logistics Engineering , Xinjiang Agricultural University , Urumqi , Xinjiang 830091 , China
Distribution Characteristics Of Internal Distress And Maintenance Decision-Making For Asphalt Pavement Based On Three-Dimensional Ground-Penetrating Radar, Li Xiaohua, Song Liang, Ye Wei, Xie Xiaodong, Yang Jiangang, Gao Jie
Journal of China & Foreign Highway
The distribution characteristics of internal distress in pavement structures and the corresponding maintenance decisions are crucial for improving road performance and extending service life.Based on three-dimensional ground-penetrating radar (3D GPR ) technology,this study investigated the internal distress of a 12-kilometer section of both driving and overtaking lanes of an expressway in Hubei Province.High-resolution images of internal pavement distress were obtained,and milling maintenance decisions were optimized by employing these images and a modular decision-making model.Through an efficient and non-destructive technique,the distribution characteristics of internal pavement distress were analyzed,and potential distress types were identified,providing a scientific basis for maintenance decision-making.Data analysis revealed …
Integrated Decision Support System For Optimizing Time And Cost Trade Offs In Linear Repetitive Construction Projects,
2025
The British University in Egypt
Integrated Decision Support System For Optimizing Time And Cost Trade Offs In Linear Repetitive Construction Projects, Ahmed Gouda Mohamed
Civil Engineering
time and cost performance. Traditional scheduling techniques often struggle to effectively address these complexities. This paper aims to enhance project optimization by introducing a metaheuristicbased Time-Cost Trade-off (TCT) framework specifically designed for repetitive project environments. Unlike previous studies that focus solely on single-algorithm applications, this research evaluates two metaheuristic optimization strategies—Genetic Algorithm (GA) and Particle Swarm Optimization (PSO)—within a consistent problem setting. The framework employs both algorithms, which are independently assessed for their effectiveness in tackling the Linear Repetitive Project Time-Cost Trade-off (LRPTCT) problem. The methodology utilizes task decomposition alongside the Line of Balance (LOB) scheduling technique, facilitating a more …
Practicality Of Implementing Sub-Clause 8.4 [Advance Warning] Of The Fidic 2017 Red Book In Egypt,
2025
American University in Cairo
Practicality Of Implementing Sub-Clause 8.4 [Advance Warning] Of The Fidic 2017 Red Book In Egypt, Gehad Ibrahim
Theses and Dissertations
Disputes in construction projects can cause cost and time overruns that can be detrimental to the parties involved and to the project. Several measures have been advocated by the industry’s practitioners in an attempt to avoid disputes and their adverse impacts. One of these measures is the introduction of advance warning sub-clauses in construction contracts, where the contracting parties play a proactive and collaborative role in warning each other of potential adverse impacts to the project. Such clauses have been in the NEC suite of standard construction contracts for decades and have recently found their way to the 2017 edition …
Investigating The Properties Of Eco-Bricks Composed Of Sawdust, Bamboo, And Varying Composition Of Sugarcane Bagasse Ash And Portland Cement,
2025
De La Salle Santiago Zobel School
Investigating The Properties Of Eco-Bricks Composed Of Sawdust, Bamboo, And Varying Composition Of Sugarcane Bagasse Ash And Portland Cement, Wilfred Victor C. Marasigan, Julia Sophia Antonia S. Encarnacion, Czyrus Michael A. Bajeta, Alijah F. Gonzales, Juan Carlo T. Gumangan
Sinaya: A Philippine Journal for Senior High School Teachers and Students
With the construction industry contributing nearly 40% of global greenhouse gas emissions, there is a growing need for innovative and sustainable building materials. This research investigates a new eco-friendly concrete brick incorporating sugarcane bagasse ash (SCBA), sawdust, and bamboo fibers. Three eco-brick mixtures, each containing 2% bamboo fiber and 10% sawdust by weight but with varying proportions of Portland cement (PC) and SCBA, were tested against a standard brick for compressive strength, flexural strength, and water absorption. The optimal mixture, with 2% bamboo fiber by weight, 10% sawdust by weight, 85% PC, and 15% SCBA, exhibits compressive and flexural strength …
An Llm Approach For Automating The Analysis Of Bim (Ifc) Data,
2025
American University in Cairo
An Llm Approach For Automating The Analysis Of Bim (Ifc) Data, Miral Selim
Theses and Dissertations
This thesis introduces a novel methodology for automating the analysis of Building Information Modeling (BIM) data using LangGraph, an advanced extension of the LangChain framework, and integrating Google’s Gemini Large Language Model (LLM) with IfcOpenShell. BIM, and specifically Industry Foundation Class (IFC) files, are widely used in the construction industry for representing and managing building data. However, analyzing this data effectively remains a significant challenge due to its volume and complexity. Additionally, analyzing BIM data typically requires knowledge of different BIM software depending on the application. This research addresses this challenge by creating a workflow that utilizes LangGraph’s ability to …
Optimization Of Pile Construction Sequence Using Cfa Machines,
2025
The American University in Cairo AUC
Optimization Of Pile Construction Sequence Using Cfa Machines, Omar Wael Ammar
Theses and Dissertations
In most construction projects with deep foundations, piling activities are critical to the project schedule and often fall on the critical path. The piling construction process requires a diverse range of resources, including equipment, materials, and skilful labour. Without carefully planning the construction process according to installation standards, there is a significant risk of time and cost overruns. These overruns are caused by inefficiencies such as equipment idle or lost time due to required lags between closely spaced piles. Therefore, it is essential to develop an optimized construction sequence to minimize these risks and enhance overall project efficiency. The primary …
Exploring Sustainable Practices In Educational Buildings During The Project Lifecycle In Egypt,
2025
Future university in egypt
Exploring Sustainable Practices In Educational Buildings During The Project Lifecycle In Egypt, Abdallah Awny, Youssef A. Awad, Hosam Hegazy, Ibrahim Mahdi
Future Engineering Journal
Sustainable construction approaches are essential for mitigating environmental concerns and enhancing energy efficiency in educational facilities. This research examines sustainability solutions in Egyptian educational institutions, concentrating on the design, building, and operating stages. The study combines quantitative and qualitative assessments from a survey of 66 industry experts, evaluating essential sustainability criteria like energy efficiency, water conservation, material sustainability, and operating expenses. Statistical methods, such as the Relative Importance Index (RII) and correlation analysis, were used to assess the relevance and interrelations among sustainability factors. The findings reveal that energy efficiency (RII: 0.82) and the promotion of health and well-being (RII: …
Centralized, Decentralized And Hybrid Wastewater Management Approaches – Gap Study,
2025
Future University in Egypt
Centralized, Decentralized And Hybrid Wastewater Management Approaches – Gap Study, Zeyad Kadry, Ahmed M. Ebid Dr., Ibrahim Mahdi
Future Engineering Journal
This literature review highlights advancements in wastewater management, emphasizing hybrid systems that integrate centralized and decentralized approaches. It underscores the cost-effectiveness and scalability of decentralized wastewater management (DWWM) for small urban and rural areas, despite higher land and capital needs. Optimization frameworks utilizing advanced computational tools, such as genetic algorithms and GIS, have proven effective in reducing costs and enhancing resource recovery, with decision-support frameworks tailored for rural planning. The integration of synergistic technologies like vertical farming and photovoltaic energy enhances the sustainability and resilience of decentralized systems in urban contexts. Additionally, innovative treatment methods, including nano-disinfection and advanced coagulation, …
Study Of Capital And Operation Costs For Reverse Osmosis Desalination Plants,
2025
The American University in Cairo AUC
Study Of Capital And Operation Costs For Reverse Osmosis Desalination Plants, Habiba Mahdy Mohamed
Theses and Dissertations
Desalination is a progressively common solution to supply freshwater in numerous parts of the globe where this resource falls short. Among all desalination techniques, seawater reverse osmosis (SWRO) is the most globally prevalent technology. Evaluating a desalination technology's cost-effectiveness is essential to ensure a well-designed plant can be implemented successfully and within an acceptable budget. In the Egyptian context, where water scarcity heightens the urgency of effective resource allocation, economic indicators such as capital expenditure (CAPEX) and operational expenditure (OPEX) are pivotal in shaping policy and planning decisions. Adopting this integrated financial perspective ensures that desalination projects are not only …
Caed Shop Entrance Wall Redesign,
2025
California Polytechnic State University, San Luis Obispo
Caed Shop Entrance Wall Redesign, Ellen Elizabeth Untalan, Joelle Schalesky, Katherine Evalyn Timbes
Architectural Engineering: Graduate Reports
This project involved the replacement and redesign of the north wall at the CAED Support Shop at Cal Poly, San Luis Obispo. The redesign aligned the wall with the adjacent Engineering West building. The original concrete wall was designed with jagged recesses to accommodate large trash bins. These recesses no longer serve their intended function due to the permanent relocation of these bins. The replacement CMU low lift grouted wall optimizes courtyard space, enhances aesthetic cohesion, and maintains architectural features consistent with the existing structure. The following report outlines the process necessary to complete this project, including the permitting process, …
