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A Study On Chemical Grouting Of Quartz Sand, Bingfeng Xue 2018 The University of Western Ontario

A Study On Chemical Grouting Of Quartz Sand, Bingfeng Xue

Electronic Thesis and Dissertation Repository

Chemical grouting has been used in engineering projects for decades. The primary objectives of chemical grouting in geotechnical engineering projects are to increase the soil strength, to decrease the soil permeability, and to control deformations of in-situ soil. In the design and applications of chemical grouting, laboratory testing of chemical grouted samples is an important step for the feasibility assessment.

The advantages of sodium silicate grout include high penetrability, flexible set times, and environmentally friendly, which makes it one of the most employed grouts in applications. Recently, an innovative sodium silicate, which has the silica to alkali ratio of 4 ...


Development Of A Hydraulic Conductivity Placement Window Using Centrifuge Techniques, Greg Thomas 2018 University of Arkansas, Fayetteville

Development Of A Hydraulic Conductivity Placement Window Using Centrifuge Techniques, Greg Thomas

Civil Engineering Undergraduate Honors Theses

A centrifuge soil testing device, currently operated by researchers at the University of Arkansas, was used to develop a technique to determine a hydraulic conductivity placement window. The purpose of this research was to develop a placement window by means of a centrifuge instead of by means of a panel board. Soil specimens were created at standard PRcotor energy and at 50 percent of Standard Proctor energy at -3 percent of optimum, -1.5 percent of optimum, two specimens at optimum, +1.5 percent of optimum, and +3 percent of optimum water content. Values of hydraulic conductivity for the respective ...


Liquefaction-Induced Dragload And/Or Downdrag On Deep Foundations Within The New Madrid Seismic Zone, Ishimwe Elvis 2018 University of Arkansas, Fayetteville

Liquefaction-Induced Dragload And/Or Downdrag On Deep Foundations Within The New Madrid Seismic Zone, Ishimwe Elvis

Theses and Dissertations

Deep foundation elements are typically used to transfer structural loads for multi-story buildings and large-span bridges to a competent soil layer when 1) the soil close to the ground surface has no sufficient bearing capacity, and when 2) liquefiable soils are encountered. The majority of the bridges constructed within seismic zones rely upon the stability of earthen embankments and deep foundation that are installed above or within liquefiable soil deposits. Despite large factor of safety values or different load and resistance factors being used to adequately design deep foundations within seismic areas, soil liquefaction may cause extensive damage to the ...


The Intrinsic Properties Of Reconstituted Soils, Nabeel Shaker Mahmood 2018 University of Arkansas, Fayetteville

The Intrinsic Properties Of Reconstituted Soils, Nabeel Shaker Mahmood

Theses and Dissertations

Reconstituted specimens are often utilized to characterize engineering properties of cohesive soils. A series of undrained triaxial tests were conducted on reconstituted soil specimens to evaluate 1) the influence of stress path, 2) the intrinsic shear strength behavior, and 3) the small-strain characteristics. The stress path tests were conducted on kaolinite specimens reconstituted from slurries with water content values of one and one-half times the liquid limit of the soil (1.5LL). To evaluate the intrinsic undrained shear strength and the intrinsic small-strain properties, the triaxial tests were performed on kaolinite and illite specimens that were reconstituted at two levels ...


Introduction To Infrastructure - The Influence Of Natural Disasters On Infrastructure, Tri Tam Nguyen, Sean M. Raday, Daniel Leverick 2018 Rowan University

Introduction To Infrastructure - The Influence Of Natural Disasters On Infrastructure, Tri Tam Nguyen, Sean M. Raday, Daniel Leverick

Student Research Symposium Posters

In this paper, three major hurricanes in 2017 were examined to determine the damage these hurricanes have done to the infrastructure. Infrastructure has an important role in the nation’s sustained economic development. Infrastructure consists of two main types which are “hard” infrastructure and “soft” infrastructure. Hard infrastructure is the physical networks which include transportation, power, etc. while soft infrastructure is institutions and human capital. Inadequate and inefficient performance of “hard” or “soft” infrastructure would prevent economy from achieving full growth. In the past decades, a significant increase in the number of natural disasters has had great impact on infrastructure ...


Hawai'i Wildlife Fund V. County Of Maui, Lowell J. Chandler 2018 Alexander Blewett III School of Law at the University of Montana

Hawai'i Wildlife Fund V. County Of Maui, Lowell J. Chandler

Public Land and Resources Law Review

In Hawai’i Wildlife Fund v. County of Maui, the Ninth Circuit held that the plain language of the Clean Water Act provides jurisdiction over indirect discharges of pollutants from a point source into groundwater that is shown to be connected to navigable waters. The court found that studies confirmed pollutants entering the Pacific Ocean were fairly traceable to the County of Maui’s sewage disposal wells. In affirming the district court’s ruling, the Ninth Circuit held that Maui County violated the Clean Water Act by discharging pollutants into a navigable water without the required permit. The court also ...


Practical Overview Of Revised Section 918, Geosynthetics_Piccoli, Santino Piccoli 2018 Purdue University

Practical Overview Of Revised Section 918, Geosynthetics_Piccoli, Santino Piccoli

Purdue Road School

INDOT Standard Specifications Section 918, Geosynthetics, has been revised and updated, broadening the tools available to designers and contractors challenged with variable soil types and site conditions. The revision effort included harmonizing Section 200, 600, and 900 language relative to the design and use of geosynthetics. Section 918 broadly pertains to geosynthetics, which includes geotextiles, geogrids, geocells, geomembranes, and geocomposites. This session includes a practical discussion about specific changes to geotextile specifications and the addition of geotextile types.


An Investigation Of Load And Resistance Factor Design Of Drilled Shafts Using Historical Field Test Data, Kam Ng, Jessica Garder, Sri Sritharan, Jeramy Ashlock 2018 University of Wyoming, Laramie, WY

An Investigation Of Load And Resistance Factor Design Of Drilled Shafts Using Historical Field Test Data, Kam Ng, Jessica Garder, Sri Sritharan, Jeramy Ashlock

Sri Sritharan

To achieve engineered designs with consistent levels of reliability, the Federal Highway Administration (FHWA) mandated that all new bridges initiated after October 1, 2007, including those founded upon drilled shafts, be designed according to the Load and Resistance Factor Design (LRFD) approach. As the first step in developing efficient regional LRFD procedures for drilled shafts, the Drilled SHAft Foundation Testing (DSHAFT) database was formulated. DSHAFT was aimed at assimilating high quality, historical drilled shaft test data from Iowa and the surrounding states, and it presently contains data from 41 drilled shaft load tests, 38 of which are O-cell load tests ...


Spot-R By Triax, Purdue ECT Team 2018 Construction Engineering & Management, Purdue University

Spot-R By Triax, Purdue Ect Team

ECT Fact Sheets

Triax’s Spot-r system was developed to tackle the construction industry’s unique safety and productivity challenges, stemming from a demonstrated lack of total jobsite visibility and automatically collected, easily accessible field data. Spot-r by Triax combines a proprietary mesh network with sensor technology to record and transmit previously unattainable workforce and equipment location, activity and safety data within a defined area – all in real-time.

The Spot-r network is installed around the site and operates in a 900 MHz network, with a subset using a cellular connection to forward Spot-r sensor data to Triax’s custom, cloud dashboard. In the ...


Purdue’S Biowall, Purdue ECT Team 2018 Construction Engineering & Management, Purdue University

Purdue’S Biowall, Purdue Ect Team

ECT Fact Sheets

Mechanical ventilation, energy recovery ventilation, and infiltration (air that leaks into a building) are commonly used to introduce fresh air. These are all valid approaches, but a living plant-based filter is an innovative complement to these traditional technologies. A Biowall has the potential to improve indoor air quality while reducing the quantity of air needed for ventilation, creating the potential for energy savings. Figure 1 shows a Biowall prototype being evaluated in the ReNEWW House, a research home located near the Purdue University campus (http://www.renewwhouse.com/).


Mdp (Machine Drive Power) Intelligent Compaction Technology, Purdue ECT Team 2018 Construction Engineering & Management, Purdue University

Mdp (Machine Drive Power) Intelligent Compaction Technology, Purdue Ect Team

ECT Fact Sheets

Caterpillar developed MDP (Machine Drive Power) technology to fill this gap. Rather than an accelerometer and vibratory drum, it uses the principle of rolling resistance to provide indications of soil stiffness. This allows it to perform more reliably on cohesive and granular soils with less variability than accelerometer systems. It also means that the technology can be used on both vibratory and static drum compactors, which are often used on larger sites. While the technology is quite useful on its own, it is even better as a complementary technology to the existing accelerometer-based systems. Contractors who use vibratory soil compactors ...


An Experimental Investigation Of The Influence Of Sampling On The Behavior Of Intermediate Soils, William Lukas 2018 University of Massachusetts Amherst

An Experimental Investigation Of The Influence Of Sampling On The Behavior Of Intermediate Soils, William Lukas

Doctoral Dissertations

Laboratory tests were performed in order to determine the effects of tube sampling disturbance on intermediate soils. Synthetic soils composed of Kaolin clay and silica silt, a reconstituted natural silt, and block sample specimens of a sensitive marine clay were tested. Tube sampling disturbance was simulated in a triaxial stress path system with bender element using the Ideal Sampling Approach prior to reconsolidation and undrained shear. ISA strain cycles of ±0.5, ±1 and ±3% were used to represent progressively greater degrees of disturbance. The influence of overconsolidation ratio (OCR) was explored by testing at OCRs of 1, 1.8 ...


Performance Of The Grout Curtain At The Kentucky River Lock And Dam No. 8, Robert C. Hatton 2018 University of Kentucky

Performance Of The Grout Curtain At The Kentucky River Lock And Dam No. 8, Robert C. Hatton

Theses and Dissertations--Civil Engineering

Karst bedrock conditions and deterioration of the lock and dam structures have resulted in significant leakage through, underneath, and around Lock and Dam No. 8 on the Kentucky River. During severe droughts, the water surface in Pool No. 8 has been observed to drop below the crest of the dam, resulting in water supply shortages and water quality issues for surrounding communities reliant on the pool. Presently, the primary purpose of Lock and Dam No. 8 is water supply. Pool No. 8 is currently where the cities of Nicholasville (Jessamine County, KY) and Lancaster (Garrard County, KY) draw their water ...


Agenda For The Fifth Meeting Of The Forum On Soil Dynamics, Shamsher Prakash 2017 Missouri University of Science and Technology

Agenda For The Fifth Meeting Of The Forum On Soil Dynamics, Shamsher Prakash

Forum for Promotion of Soil Dynamics in India

No abstract provided.


Membership Of Forum For Promotion Of Soil Dynamics In India, Shamsher Prakash 2017 Missouri University of Science and Technology

Membership Of Forum For Promotion Of Soil Dynamics In India, Shamsher Prakash

Forum for Promotion of Soil Dynamics in India

No abstract provided.


Minutes Of The Fifth Meeting Of The Forum For Promotion Of Soil Dynamics In India, Shamsher Prakash 2017 Missouri University of Science and Technology

Minutes Of The Fifth Meeting Of The Forum For Promotion Of Soil Dynamics In India, Shamsher Prakash

Forum for Promotion of Soil Dynamics in India

No abstract provided.


The Role Of Soil Stiffness In Reverse Fault Rupture Propagation, Moises I. Buelna 2017 California Polytechnic State University, San Luis Obispo

The Role Of Soil Stiffness In Reverse Fault Rupture Propagation, Moises I. Buelna

Master's Theses and Project Reports

A nonlinear Mohr-Coulomb constitutive model with a strain dependent yield surface and non-associated flow was employed to study the plastic soil properties which affect the rate of surface fault rupture propagation in reverse events. These numerical simulations show a trend for soils with higher stiffness to have a higher rate of rupture propagation. Additionally the study shows the effects of strain softening and hardening on the rate of rupture propagation. Soils which strain harden exhibiting ductile behavior typically require more basal offset to rupture to the surface than soils which strain soften exhibiting brittle behavior. These results agree with our ...


Development Of An Internal Camera-Based Volume Determination System For Triaxial Testing, Sean Elliott Salazar 2017 University of Arkansas, Fayetteville

Development Of An Internal Camera-Based Volume Determination System For Triaxial Testing, Sean Elliott Salazar

Theses and Dissertations

Accurate measurement of axial, radial, and volumetric strain parameters are critical to the understanding of phase relationships and the constitutive behavior for saturated and unsaturated soils. The use of photographic monitoring techniques for laboratory-based measurement of these parameters have become common. A novel technique that utilized camera instrumentation located within the triaxial testing cell was developed and validated. By placing the instrumentation inside of the cell, instead of the instrumentation being located outside of the cell, the technique eliminated cumbersome corrections required to account for optical distortions due to 1) the refraction of light at the confining fluid-cell wall-atmosphere interfaces ...


Cost-Savings Of Implementing Site-Specific Ground Motion Response Analysis In Design Of Mississippi Embayment Bridges, Ethan Ryan Benton Baker 2017 University of Arkansas, Fayetteville

Cost-Savings Of Implementing Site-Specific Ground Motion Response Analysis In Design Of Mississippi Embayment Bridges, Ethan Ryan Benton Baker

Theses and Dissertations

Deep dynamic site characterization and a site-specific ground motion response analysis (SSGMRA) were conducted for a bridge site in Monette, Arkansas. The SSGMRA indicated the design acceleration response spectrum determined using the American Association of State Highway and Transportation Officials (AASHTO) general seismic procedure could be reduced by 1/3 for the short period range due to attenuation of the short-period ground motions. The steel girder pile-bent bridge, originally designed using the AASHTO general seismic design procedure, was redesigned using the updated seismic demands estimated from SSGMRA. A cost-savings analysis was then conducted to determine the potential savings associated with ...


Geophysical Delineation Of Megaporosity And Fluid Migration Pathways For Geohazard Characterization Within The Delaware Basin, Culberson County, Texas, Jonathan David Woodard 2017 Stephen F. Austin State University

Geophysical Delineation Of Megaporosity And Fluid Migration Pathways For Geohazard Characterization Within The Delaware Basin, Culberson County, Texas, Jonathan David Woodard

Electronic Theses and Dissertations

ABSTRACT

Differential dissolution of gypsum karst within the Delaware Basin poses a significant threat to infrastructure that society depends on. The study area is located in Culberson County, Texas and traverses a distance of approximately 54 kilometers along RM 652 within the Gypsum Plain which is situated on the northern margin of the Chihuahua Desert and includes outcrops of Castile and Rustler strata that host karst geohazards. Regions of karst geohazard potential have been physically surveyed proximal to the study area in evaporites throughout the Castile Formation outcrop; minimal hazards, in comparison to the Castile Formation, have been documented in ...


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