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Full-Text Articles in Civil and Environmental Engineering

Study On Parameter Optimization Of Feet‐Lock Anchor Pipes Of Tunnels In Unconsolidated Formation, Tang Heqing, Jiang Xishan, Yang Peng Mar 2023

Study On Parameter Optimization Of Feet‐Lock Anchor Pipes Of Tunnels In Unconsolidated Formation, Tang Heqing, Jiang Xishan, Yang Peng

Journal of China & Foreign Highway

In order to give full play to the supporting role of the feet-lock anchor pipe in the tunnel with unconsolidated formation, it is necessary to obtain the optimal construction parameters of the feet-lock anchor pipe. Based on a tunnel project on the Huaping–Lijiang Expressway in Yunnan Province, this paper conducted numerical simulation and field test analysis. By comparing the arch subsidence and horizontal convergence of the supporting structure when the feet-lock anchor pipe with different parameters was constructed, the paper explored the characteristics and causes of the influence of construction parameters on the feet-lock effect. The results show that the …

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Simulation Study On Flame Retardant Effect Of Warm‐Mixed Flame Retardant Pavement In Highway Tunnel Mar 2023

Simulation Study On Flame Retardant Effect Of Warm‐Mixed Flame Retardant Pavement In Highway Tunnel

Journal of China & Foreign Highway

In order to obtain the flame retardant effect of the warm-mixed flame retardant asphalt pavement in highway tunnels, based on the finite element method and thermodynamics theory, the thermal analysis module of Ansys finite element software was used to study the flame retardant effect of ordinary asphalt pavement, flame retardant asphalt pavement, and warm-mixed flame retardant asphalt pavement under different fire scales. The maximum temperature of the three types of pavement increased with the increase in the fire scale. Under any fire scale, the flame retardant effect of the warm-mixed flame retardant asphalt pavement was increased by 4.9%–8.5% compared with …

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Installation Construction Technology Of Composite Girder Cable‐Stayed Bridge Superstructure In Deep‐Cutting Gorge, Ren Lei, Lu Liang, Dong Zhengliang Mar 2023

Installation Construction Technology Of Composite Girder Cable‐Stayed Bridge Superstructure In Deep‐Cutting Gorge, Ren Lei, Lu Liang, Dong Zhengliang

Journal of China & Foreign Highway

In view of the installation problems of superimposed beam cable-stayed bridge across the deep canyon, this paper studied the superimposed beam lifting, transport on beam, and superimposed beam installation and proposed three kinds of lifting technology with tower truss crane, beam lifting door crane, and large tower crane, as well as two kinds of installation technology including piecemeal assembly by full rotating deck crane and whole segment assembly truss deck crane. It also made a relative comparative analysis, solving the difficulty in vertical lifting on such bridges and providing a reference for the construction of the same type of cable-stayed …

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Experiment Research Of High Pressure Jet Grouting Pile On Ultra‐Shallow Buried Tunnel In Strong Weathered Stratum, Lu Liyang, Liu Huan, Li Pinpin Mar 2023

Experiment Research Of High Pressure Jet Grouting Pile On Ultra‐Shallow Buried Tunnel In Strong Weathered Stratum, Lu Liyang, Liu Huan, Li Pinpin

Journal of China & Foreign Highway

By taking the ultra-shallow buried construction of Xinwu Tunnel in Luoding–Xinyi Expressway in Guangdong Province as the engineering background, the key construction parameters and formation reinforcement effect of high-pressure rotary churning pile in ultra-shallow buried tunnel surrounding rock of fully weathered strata were compared. The results show that: ① slurry pressure, rotary churning speed, and lifting speed have obvious effects on the static load bearing capacity of a single pile. Under the same static load condition, greater slurry pressure indicates a lower cumulative settlement value of a single pile and a smaller increase in cumulative settlement value, and the change …

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Study On Anti‐Scattering Performance Of Asphalt Concrete On Aggregate Scattering Pavement Of Highway, Yang Siyuan, Chen Guiliang Mar 2023

Study On Anti‐Scattering Performance Of Asphalt Concrete On Aggregate Scattering Pavement Of Highway, Yang Siyuan, Chen Guiliang

Journal of China & Foreign Highway

Due to the lack of quantitative evaluation methods for aggregate scattering degree of expressway asphalt pavement in China and abroad, according to the disease characteristics of surface layer spalling, this paper adopted the Cantabro standard dispersion test to sample the concrete of the section with aggregate scattering of Huangqunan Expressway (G3) in Zhejiang Province. The dispersion impact damage modes of the mixture with different severity were analyzed, and the anti-dispersion performance of concrete was evaluated by mass loss rate and water absorption rate. The results show that aggregate scattering will reduce the density of the concrete structure at the surface …

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Variable Speed Limit Control Method For Highway Under Dense Fog, Sun Jiancheng, Qiao Jiaxing Mar 2023

Variable Speed Limit Control Method For Highway Under Dense Fog, Sun Jiancheng, Qiao Jiaxing

Journal of China & Foreign Highway

In order to solve the problem of traffic safety on expressways under dense fog and change the original fixed speed limit measures, a variable speed limit control method based on the safe allowable speed was proposed. The speed limit value was calculated based on the regulations in road traffic safety law on the speed under dense fog by considering that the traffic law does not mention the road alignment conditions, road conditions, and other factors, and the monitor data was used to approximate replace the data of individual vehicles for data optimization, and the safe speed and safe distance of …

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Application Of Digital Image Processing In Cracks Of Concrete Pavement, Gao Fan, He Chunguang, Wang Pengzhang, Qin Yanping, Duo Huaqiong Mar 2023

Application Of Digital Image Processing In Cracks Of Concrete Pavement, Gao Fan, He Chunguang, Wang Pengzhang, Qin Yanping, Duo Huaqiong

Journal of China & Foreign Highway

The image obtained by using the traditional crack detection method of concrete pavement has some problems, such as low contrast and high noise, which makes it difficult to meet the requirements of modern road engineering management or non-destructive testing. In order to eliminate the interference in crack images, digital image processing technology was used to improve the image quality through computers. This paper took digital image processing as the core and introduced its development and application in pavement cracks. Based on the research progress and achievements of digital image processing on pavement cracks in recent years, the principles and characteristics …

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Design And Experimental Study On Special Spherical Support Of Pingtang Bridge, Tang Zhi, Ma Baihu, Du Bin, Xu Xiangdong, Xia Junyong Mar 2023

Design And Experimental Study On Special Spherical Support Of Pingtang Bridge, Tang Zhi, Ma Baihu, Du Bin, Xu Xiangdong, Xia Junyong

Journal of China & Foreign Highway

The vertical bearing capacity of the 16# pier of Pingtang Bridge is 10 000 kN, and the horizontal bearing capacity along the bridge is 12 000 kN, which is 120% of the vertical bearing capacity. The support angle needs to reach the technical parameter requirements of 0.05 rad, which far exceeds the requirements of 10–40% horizontal force of conventional highway supports. According to the specific engineering situation, a new type of support with a large horizontal bearing capacity was designed. Firstly, the finite element model of the support was established to analyze the mechanical properties of the support, and the …

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Study On Practical Method Of Safety Assessment For Bridges Under Heavy‐Cargo Transportation, Jiang Xu, Wang Wanfeng, He Zhensheng, Gao Xuefeng Mar 2023

Study On Practical Method Of Safety Assessment For Bridges Under Heavy‐Cargo Transportation, Jiang Xu, Wang Wanfeng, He Zhensheng, Gao Xuefeng

Journal of China & Foreign Highway

In order to meet the requirements of the industry for the high efficiency, safety, and reliability of the traffic safety assessment of heavy-duty vehicles, this paper proposed a method that combined a real-time monitoring system with a finite element method for the traffic safety assessment of heavy-duty vehicles on bridges and verified the method through practical projects. The paper evaluated the bridge’s technical condition level before the heavy-duty vehicle passes and determined the resistance reduction factor considering the bridge’s technical condition level. The finite element analysis model of the bridge was established, and the reliability of the model was verified …

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Study On Pavement Performance Of Waterborne Epoxy Emulsified Asphalt And Its Application In Micro‐Surface, Jiang Hai, Liu Dachang Mar 2023

Study On Pavement Performance Of Waterborne Epoxy Emulsified Asphalt And Its Application In Micro‐Surface, Jiang Hai, Liu Dachang

Journal of China & Foreign Highway

In order to improve the pavement performance at micro-surface, waterborne epoxy resin was used to modify the emulsified asphalt, and the compatibility, microstructure, mechanical properties, rheological properties, and pavement performance of mixtures of the modified emulsified asphalt were studied. The storage stability test shows that the epoxy emulsion has good compatibility with emulsified asphalt. With the increase in waterborne epoxy resin content, the modified emulsified asphalt tends to form an epoxy resin-dominated skeleton structure. At the same time, with the increase in waterborne epoxy resin content, the adhesion and mechanical properties of emulsified asphalt and aggregate are significantly improved. At …

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Modeling Leachate Treatment Processes In Adsorbent-Amended Hybrid Constructed Wetland, Ishfaqun Nisa Mar 2023

Modeling Leachate Treatment Processes In Adsorbent-Amended Hybrid Constructed Wetland, Ishfaqun Nisa

USF Tampa Graduate Theses and Dissertations

Due to their efficiency in removing ammonia nitrogen, Constructed Wetlands (CW) are currently considered a very useful method for on-site leachate treatment. In recent years, the use of adsorbent media in CWs, such as zeolite and biochar, to improve pollutant removal efficiency has been explored and these studies indicate that incorporating zeolite can improve the nitrification process, while the addition of biochar can enhance the denitrification process and the removal of organic compounds. However, studies on mechanistic/process models simulating performance of adsorbent-amended CWs for treating landfill leachate are limited. This study presents simulation results for both unamended and adsorbent-amended hybrid …

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The Intersection Of Utility Coordination And Sue, Natalie Parks, Ken Kerr Mar 2023

The Intersection Of Utility Coordination And Sue, Natalie Parks, Ken Kerr

Purdue Road School

ASCE recently released two new SUE standards—ASCE 38-22 is the updated SUE standard commonly used during the utility coordination process during design, and ASCE 75-22 is the new utility as-built standard that is essential for the accurate location of newly relocated facilities in construction. This presentation will illustrate the interaction and relationship between SUE and utility coordination to enhance project deliverables and reduce risk during construction.

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Under Water: How To Green Up Your Roadway Project, Brian Tornes Mar 2023

Under Water: How To Green Up Your Roadway Project, Brian Tornes

Purdue Road School

Learn effective streambank stabilization techniques and funding resources that can be used to protect your roadways. Presenters will explain how to select the most effective stream bank restoration technique— natural channel design, traditional engineering, or both. Also learn how to maximize water quality and asset protection through stream bank stabilization using case studies that compare cost, form, and function. Lastly, we will review funding opportunities for the proposed green strategies.

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Alternative Delivery: Beyond Design-Build, Steve Davidson, William Stringer Mar 2023

Alternative Delivery: Beyond Design-Build, Steve Davidson, William Stringer

Purdue Road School

Owners are facing increased pressure to deliver major infrastructure projects in a timely and cost-efficient manner. Pain from inflation and labor/material short- ages are felt nationwide. To maximize limited budgets, owners are exploring alternative delivery methods. Attendees will learn about the benefits and pitfalls of progressive design-build (PDB) and construction manager/general contractor (CM/GC). Presenters will share best practices for determining if PDB and CM/GC are appropriate for your project and provide case study examples.

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Indiana Electric Vehicle Infrastructure Implementation Update, Diane Newton, Scott Manning, Kerri Garvin Mar 2023

Indiana Electric Vehicle Infrastructure Implementation Update, Diane Newton, Scott Manning, Kerri Garvin

Purdue Road School

2022 was a big year for EV infrastructure in Indiana. Starting with the approval of Indiana’s EV Implementation Plan in September 2022, INDOT and their team have been working fast and furiously to plan and deploy a network of DC Fast Charging Stations across the state. We will give an update on the plan implementation and next steps to inform stakeholders across the state on what they need to know for the next few years.

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Environmental Assessments On A Local Project, Robert Winebrinner, Trevor Wieseke, Summer R. Elmore, Alison Krupski, Mike Maurovich Mar 2023

Environmental Assessments On A Local Project, Robert Winebrinner, Trevor Wieseke, Summer R. Elmore, Alison Krupski, Mike Maurovich

Purdue Road School

This presentation will go through the environmental process of a recent $125M local project within Noblesville. What are the major differences between the National Environmental Policy Act (NEPA) and State Environmental Policy Act (SEPA) process as it relates to an environmental assessment (EA)? What is required, what is not required, and what is optional? How long does the process take? Join us as we walk through this exciting process and experience.

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Design, Collaborate, Thrive: The Broad Ripple Avenue Project, Jessica Hawley, Emily Nelson, Ericka Miller Mar 2023

Design, Collaborate, Thrive: The Broad Ripple Avenue Project, Jessica Hawley, Emily Nelson, Ericka Miller

Purdue Road School

Broad Ripple Avenue (College Avenue to Winthrop Avenue) needed large-scale stormwater improvements. With the help of the Lochmueller Group and the Broad Ripple Village Association, Indianapolis DPW perceptively took this opportunity to also improve pedestrian facilities and regional multi-modal connectivity by combining multiple regional projects into one construction contract. This consolidation allowed for a cohesive public message through proactive public involvement. Presenters will share how consensus was built between invested parties through a successful public and private partnership.

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Decades In The Making: Reimagine Pleasant Street, Alison Krupski, Tanner Mckinney, Mike Maurovich Mar 2023

Decades In The Making: Reimagine Pleasant Street, Alison Krupski, Tanner Mckinney, Mike Maurovich

Purdue Road School

The Reimagine Pleasant Street project is a multi-year initiative that will result in improved east-west connectivity, accessibility, and safety for the City of Noblesville, while still honoring its urban character and historic features. Participants will learn how the project team addressed the challenges and complexities of completing this $125 million local project in the heart of the city. Construction for phase 1 began in the fall of 2022, and phases 2 and 3 will start in the fall of 2023.

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How To Prepare Meaningful Crash Analysis, Taylor Ruble Mar 2023

How To Prepare Meaningful Crash Analysis, Taylor Ruble

Purdue Road School

Many people outside of traffic engineering are required to conduct a crash history analysis as part of their scoping efforts for non-safety funded projects. Some engineers may not have much experience working with crash data or may not know how best to manipulate it to arrive at meaningful results. Using real-world examples, this presentation will walk through each step in requesting, filtering, diagramming, and interpreting crash data.

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I-70 Truck Automation Corridor Update, Diane Newton, Scott Manning, Anmol Sidhu Mar 2023

I-70 Truck Automation Corridor Update, Diane Newton, Scott Manning, Anmol Sidhu

Purdue Road School

Truck automation arrived in the Midwest in 2022 with the advertising of procurement for truck platooning and Level 2 and 4 automations on trucks in operations on I-70. We will discuss the readiness of infrastructure and industry to accept this technology, debunk the headlines on automation, discuss real-world feedback from both technology and trucking industries, and spotlight the partners who are helping INDOT and DriveOhio advance this project.

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Using Raised Crosswalks To Elevate Pedestrian Safety, Bradley Pease, William Hall Mar 2023

Using Raised Crosswalks To Elevate Pedestrian Safety, Bradley Pease, William Hall

Purdue Road School

Discussion of how and when Carmel implemented raised crosswalks for successful traffic calming and enhanced pedestrian safety.

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Evansville Airport Terminal And Passenger Access, Jamin Heldt, Nate Hahn Mar 2023

Evansville Airport Terminal And Passenger Access, Jamin Heldt, Nate Hahn

Purdue Road School

The Evansville Airport has completely updated the terminal area and passenger access to the terminal. A plan is underway to expand the passenger parking area in the future. This presentation will review the past updates and walk through future goals.

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Dispelling Hma And Rap Myths, Bill J. Pine Mar 2023

Dispelling Hma And Rap Myths, Bill J. Pine

Purdue Road School

Today’s asphalt mixtures are higher in quality than ever before due to an increased understanding of mix design, quality control, production, and laydown operations. If you are a project owner, consultant, or contractor, there are fundamental principles that should be understood and incorporated to ensure long-term HMA performance. This session will address these principles, including the use of RAP, to help separate facts from fiction.

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Traffic Signal Preemption Near Active Railroad Crossings Revisited, Gregory Richards Mar 2023

Traffic Signal Preemption Near Active Railroad Crossings Revisited, Gregory Richards

Purdue Road School

This session is an updated version of “Traffic Signal Advance Pre-emption Design within 200’ of Active Railroad Crossings,”—a 2012 Purdue Road School presentation. The issue of Traffic Signal Preemption has changed, positively and negatively, for INDOT and the railroads. A review of the updated traffic signal preemption material will benefit designers, operations staff, and local agencies.

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South Bend Airport Tw B Realignment And Apron Project, Lisa Kinsman, Patrick Mac Carthaigh, Jeff Thoman, Ashley Thorsen Mar 2023

South Bend Airport Tw B Realignment And Apron Project, Lisa Kinsman, Patrick Mac Carthaigh, Jeff Thoman, Ashley Thorsen

Purdue Road School

South Bend Airport is in the process of a major reconstruction project to realign Taxiway B to provide a Runway Incursion Mitigation (RIM), separate Taxiway B from the Terminal Apron, and make adjustments to the terminal apron to correct drainage. This presentation will provide a full review of the project.

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Hydraulic Modeling And Environmental Flows To Inform Ecological Models, Aubrey E. Harris Mar 2023

Hydraulic Modeling And Environmental Flows To Inform Ecological Models, Aubrey E. Harris

Civil Engineering ETDs

The widespread availability of high-quality terrain and long-term hydrologic monitoring data has increased opportunities in hydraulic modeling to support regional planning and decision-making. Hydraulic modeling is already a prevalent tool in riverine construction design for issues like flood control and erosion protection. Despite hydraulic models also being relevant for characterizing habitat conditions, the use of hydraulic modeling for ecological assessment has been fragmented in scale and application. The state of the science presents multiple ways to identify environmental flow criteria and hydraulic estimation of habitat areas. However, it has been challenging to combine these approaches as a parsimonious and effective …

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Additive Manufacturing Of Engineered Cementitious Composites With Ultra-High Tensile Ductility, Amir Bakhshi Mar 2023

Additive Manufacturing Of Engineered Cementitious Composites With Ultra-High Tensile Ductility, Amir Bakhshi

Civil Engineering ETDs

One of the critical factors in the development of additive manufacturing in the construction industry is designing suitable materials for 3D printing applications. 3D concrete printing (3DCP) has gained significant attention due to the abundance and availability of concrete. However, concrete is a brittle material and, without proper reinforcement, cannot meet the requirements for structural purposes. Engineered Cementitious Composites (ECC), known for high ductility, and strain-hardening with low fiber contents, can potentially eliminate the need for steel reinforcement in 3D printing without any need for manual placement of reinforcement. A set of systematic tests on ECC mix designs' fresh and …

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Planning For Pedestrians And Bicyclists During Construction Projects, John Habermann, P.E. Mar 2023

Planning For Pedestrians And Bicyclists During Construction Projects, John Habermann, P.E.

Purdue Road School

This session will explore how the Texas Department of Transportation Waco District addressed pedestrian/bicyclist safety and mobility during a multi-year construction project along I-35. This presentation will demonstrate the value of online tools, field implementations, and data collection. Attendees will learn the value of assembling a stakeholder steering committee; counting pedestrian and bicyclists before, during, and after construction; effectively using pavement clings; and using a webpage dedicated to pedestrian/bicyclist updates.

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Preparing Municipalities For Ev, Diane Newton, Kerri Garvin Mar 2023

Preparing Municipalities For Ev, Diane Newton, Kerri Garvin

Purdue Road School

This session will cover many common questions about electric vehicles (EVs) that many cities and towns ask. What are the different charger types? Where do EV charging stations fall in our zoning guidelines? Are there public safety considerations with charging stations? Should we electrify our fleets? Are there funding opportunities for any of this? What can we do to be prepared? Join us as we answer these questions and more.

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Interstate Highway Congestion Policy Request: When And How, Douglas Homan, Alan Holderread, Michelle Witkowski Mar 2023

Interstate Highway Congestion Policy Request: When And How, Douglas Homan, Alan Holderread, Michelle Witkowski

Purdue Road School

This session will highlight current IHCP tables, policy tables, request templates, analysis tools, INDOT queue analysis spreadsheet, INDOT detour route summary spreadsheet, hourly day-of-the-week con- version factors, additional modeling efforts, common and repeated mistakes, IHCP exception checklist, and example projects.

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