Construction Engineering and Management Commons^™

Feasibility Study For A Continuous Mansfield Hollow State Park Multi-Use Path, Owen P. Spangler

Honors Scholar Theses

This report aims to design a pedestrian river crossing that connects the north and south ends of Mansfield Hollow State Park, utilizing both a new paved pathway and bridge construction. This report first uses GIS data to complete a feasibility study on pathway routing and cost. A preliminary route was selected based on grading and cost analysis. The requirements for constructing a multi-use pathway in the State of Connecticut were then explored, attempting to find a best-fit pathway alignment to accomplish that goal. Through a lengthy literature review, it was found that the pathway design would have to deviate from …

Numerical Investigations Of Gfrc Beams Strengthened In Shear With Innovative Techniques, Marwa H. Bondok, Gamal I. Khaleel, Ahmed S. Debaiky, Mohamed H. Makhlouf

Mansoura Engineering Journal

This paper discusses the Finite Element analysis (FE) conducted to predict the behavior of Glass Fiber Reinforced Concrete (GFRC) beams without shear reinforcement (stirrups) and strengthen them with proposed techniques to increase their shear strength. for this study, A total of eighteen (18) (120 * 300 * 2200 mm) specimens were modeled using Ansys™ mechanical. The main variables were the percentage of discrete glass fiber in the concrete (0.0, 0.6, and 1.2%), the type of main reinforcing bars (steel or GFRP), the shear strengthening material (GFRP or steel) links, the strengthening systems (side near-surface mounted (SNSM) bars, externally bonded (EB) …

System Dynamics And Topsis Models For Sustainable Building Materials Selection Considering Life Cycle Assessment, Shimaa Elshoubaky, Emad Elbeltagi, Mohammed Abd Elrahman, Islam Elmasoudi

Mansoura Engineering Journal

Construction industry is the most contributor to the environmental impacts. Achieving sustainability in construction is complicated, but one of the most optimal strategies is selecting sustainable building materials.

The major goal of this study is to present a new idea for choosing sustainable building materials (SBMs) by simulating sustainability parameters' behaviour. This research proposes a System Dynamics (SD) model along with the TOPSIS method based on the dynamic interactions among a number of sustainable criteria to help decision makers in sustainable building materials selection. The sustainable criteria that form system boundary are determined from previous studies and experts′ opinions. The …

Considerable Factors In Determining The Sustainability Benefits Of The Demolition Of An Existing Structure For A New Build And Of The Renovation Of An Existing Structure, Dev Boyd Hippenstiel

Construction Management

The decision between whether to demolish or renovate a building comes down to which one will satisfy the owner’s needs and objectives while remaining within budget. This project will identify factors in determining sustainability benefits between a completely new construction project that demolishes the existing structure prior to rebuilding and a renovation project that reuses some or all of the existing structure. Research on construction data, interviews conducted with leading industry members, and journals that reported on both these strategies are presented. This project will examine considerations that reduce the demolition’s negative impact on the environment and improve the overall …

Designing Safety Vests To Fit Women, Claire Peters

Construction Management

This paper focuses on the design and construction of safety vests for women, particularly in XS and XXL sizes. Safety vests are an essential piece of protective equipment worn by individuals working in environments requiring high visibility for safety reasons. The American National Standards Institute (ANSI) and the International Safety Equipment Association (ISEA) develop safety vest standards to ensure 360-degree visibility of workers, but these standards create limitations in manufacturer’s abilities to create a well-fitted vest for women of smaller stature, particularly in the sizes between XXS and S, as the required square inches of material result in a baggy …

Housing In Kibera's Soweto East Informal Settlement, Kenya: A Socio-Technical Evaluation, Tiernan Brennan

Masters

In 2003, the Kenya Slum Upgrading Programme (KENSUP) was launched in partnership with UN-Habitat and the Government of Kenya (GoK) to improve the livelihoods of people in Kenya by 2020 through the provision of improved shelter, infrastructure, land tenure and income generation. Kibera is an informal settlement in Kenya where varying housing typologies and traditional vernacular-style designs coexist with modern housing units. Soweto East was one of eighteen villages located in Kibera selected for KENSUP’s first major housing development initiative. Soweto East was selected from a screening of several housing projects that could be subjected to a socio-technical (STE). The …

Study On Thermal Property Of Fast Growing Grass Fiber And Its Asphalt Mortar, Xia Chaoming, Jiang Kang, Wu Chaofan, Liu Kefei

Journal of China & Foreign Highway

In order to investigate the thermal properties of fast-growing grass fiber and its asphalt mortar, the physical properties and thermal properties of bamboo fiber, reed fiber, and its asphalt mortar were tested and compared with those of lignin fiber and its asphalt mortar by physical property test, thermal weight loss test, and differential scanning calorimetry test. The results show that the addition of plant fiber can effectively improve the high temperature performance of asphalt, but it has a slight inhibition effect on the low temperature performance of asphalt. The quality loss of plant fiber in different temperature ranges is the …

Influence Of Curvature Radius On Mechanical Properties Of Small And Medium Span Continuous Rigid Frame Bridge During Construction Stages, Xie Yangfu, Ye Yuansheng, Gui Shuirong, Yang Yu

Journal of China & Foreign Highway

In order to study the mechanical properties and the influence of curvature radius on the mechanical properties of curved rigid frame bridge constructed by span-by-span assembly method, this paper took the continuous rigid frame bridge with a two-box standard section (35 + 35 + 35) m of Hongdu Overpass in Nanchang City as the engineering background. By changing the curvature radius, the influence of curvature radius on the mechanical properties of small- and medium-span continuous rigid frame bridges constructed by span-by-span assembly method during construction was studied. The results show that the mechanical properties such as the main beam stress, …

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 …

Study On The Effect Of Quicklime On The Properties Of Cold Mix Asphalt, Liu Tao, Yi Ming, Song Tao

Journal of China & Foreign Highway

The low initial strength of cold mixed asphalt mixture leads to the delay of traffic opening time, and the large void ratio leads to poor water stability and other problems, which seriously hinder the development of cold mixed environment-friendly construction mode. In this paper, based on the principle that the heat of quicklime in the presence of water promotes the rapid loss of water in the cold mixed mixture, the mixing test and cohesion test of the MS-3 slurry cold mixed asphalt mixture with quicklime were carried out to explore the influence of quicklime on the demulsification time and cohesion. …

The Calculation Theory Of Humidity For Subgrade ：A Perspective Review

Journal of China & Foreign Highway

Subgrade humidity has a significant impact on its stiffness, deformation, and other properties. The theoretical calculation method of humidity field has always been one of the key issues in road engineering as a research method to evaluate its evolution law and mechanism. This paper reviewed and summarized the control equation of subgrade humidity calculation, hydraulic characteristics of unsaturated subgrade soil, and influencing factors of humidity. It was found that there were few studies on the coupling effects of multiple fields and factors such as stress, seepage, vegetation, and atmosphere in the whole calculation method system. It is suggested to carry …

Experimental Study On Shear Strength Of Ehp Piles, Wang Nanjiang, Liu Jianlong, Qiu Chengchun, Zhang Yuting, Tao Xiaoyu

Journal of China & Foreign Highway

The new environmental homogeneous plastic (EHP) pile improves the construction technology of traditional soil-cement mixing piles. It mixes the soil-cement slurry evenly in advance and then pours it into holes, so as to form piles with controllable physical properties. In order to test the strength of EHP piles, direct shear tests were carried out on field core sampling, field stirring sampling, and laboratory sampling, and the effects of pile depth, cement content, age, and curing conditions on shear strength were discussed. The test results show that the shear stress-displacement curve of the in-situ core sample is strain-softening; the shear strength …

Analysis On Influence Factors Of Swelling Deformation Of Gravel Pile In Soft Soil Area Based On Orthogonal Numerical Test, Fan Liujun, Lu Xiaoming, Miao Peng

Journal of China & Foreign Highway

The gravel pile composite foundation is usually accompanied by swelling deformation when vertical settlement deformation occurs. The research on the swelling deformation characteristics and influencing factors of gravel pile composite foundations is of great importance for analyzing the settlement rule and deformation mechanism of gravel pile composite foundations. Based on an orthogonal numerical test, this paper used the finite element software Midas GTS to analyze the main influencing factors of the swelling deformation of the gravel pile and used range and variance analysis to analyze the sensitivity and significance of each influencing factor. Finally, through regression analysis, the optimized swelling …

Test And Finite Element Analysis On Flexural Properties Of Steel Plate‒Uhpc Composite Beam, Huang Yun, Zhao Hua, Tu Lei

Journal of China & Foreign Highway

In order to study the flexural properties of steel plate-ultra-high performance concrete (UHPC) composite beams, the static test of the flexural properties of a steel sheet-UHPC composite beam was first carried out. Then, Abaqus finite element software was used to simulate the whole process of static loading of the specimen, and different ways were used to simulate the studs in the composite beam. The most appropriate model was thus selected. Finally, based on the calibrated finite element model, the parameters of the steel plate-UHPC composite beam were analyzed, the main parameters included: UHPC compressive strength, steel plate strength, and stud …

Research On Reasonable Completion State And Construction Stage Of Fenghuang Road Bridge, Chen Qiang, Gao Libao, Du Hongliang

Journal of China & Foreign Highway

In order to study the reasonable completion state of Fenghuang Road Bridge and analyze the construction stage, the finite element model was first established by Midas/Civil, and the correlation matrix was extracted. The minimum strain energy of Fenghuang Road Bridge was used as the objective function, and the mathematical optimization model was established by Matlab to determine the reasonable completion state and construction sequence of the bridge. To ensure reasonable cable force of the bridge, the construction cable force was solved by the forward assembly iteration, and the law of the construction cable force was basically the same as that …

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 …

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 …

Study On Arrangement Law Of Grouting Bolt In Mountain Tunnel, Zhao Licai

Journal of China & Foreign Highway

In the sandy soil area with abundant water content, grouted bolts can solve the problems of poor stability of surrounding rock and groundwater erosion in tunnel construction. However, the unreasonable arrangement of grouted bolts will cause the waste of slurry and fail to achieve the predetermined grouting effect. Based on the differential equation of slurry diffusion, this paper realized the numerical simulation of grouted bolts in a tunnel through software secondary development. Combined with mathematical statistics, the influence of the distance of grouted bolts, tunnel radius, and grouting time on the formation of grouting rings in mountain tunnels was studied. …

Experimental Study On The Diagonal Shear Of Asphalt Mixture At Micro‐Surfaces, Huang Weirong, Yang Yuzhu, Wang Cheng, Huang Feng, Yang Bo

Journal of China & Foreign Highway

A new 45° diagonal shear test was conducted to study the shear properties of the SBR-modified emulsified asphalt mixture at the micro-surface under the influence of different loading rates, different interface states, and different temperatures and water. The shear failure forms at the micro-surface at different temperatures were explained, and the effects of viscous layer oil, soil, and water on the shear strength at the micro-surface were analyzed. The results show that a faster loading rate at the micro-surface indicates higher shear strength. The shear failure mode of micro-surface at normal temperature is mainly an interlayer shear failure, while that …

Study On Thermal Property Of Fast Growing Grass Fiber And Its Asphalt Mortar, Xia Chaoming, Jiang Kang, Wu Chaofan, Liu Kefei

Journal of China & Foreign Highway

In order to investigate the thermal properties of fast-growing grass fiber and its asphalt mortar, the physical properties and thermal properties of bamboo fiber, reed fiber, and its asphalt mortar were tested and compared with those of lignin fiber and its asphalt mortar by physical property test, thermal weight loss test, and differential scanning calorimetry test. The results show that the addition of plant fiber can effectively improve the high temperature performance of asphalt, but it has a slight inhibition effect on the low temperature performance of asphalt. The quality loss of plant fiber in different temperature ranges is the …