Under-Slab Utility Installation with Aggregate Piers: It's All About Planning
Aggregate pier ground improvement is commonly used in North America to support buildings. The technology has expanded in the last decade thanks to refinement and introduction of new techniques, more rigorous...

Drones: An Engineering Reconnaissance Tool of Tomorrow, but Here Today!
About six years ago, I began researching geotechnical engineering applications of unmanned aerial vehicles (UAVs), or drones. My initial efforts were encouraged by most of my colleagues, but were criticized...

Next-Generation Drones Bolster Bridge Inspections
A preflight, flight, and postflight drone system saves time and money in bridge inspections. It can also create a digital "twin" of bridges....

Next-Generation Sonar Improves on Best Existing Technology
A sonar system capable of visualizing underwater environments in real time can be used for underwater bridge inspections and other construction-related tasks....

Tunnel Safety (part of "Transformative Tunnel")
As part of meeting the stringent safety requirements of the Washington State Department of Transportation (WSDOT), the State Route 99 tunnel is designed to be one of the safest ever constructed, with state-of-the-art...

Design of the Future Mexico City Airport: Attaining Resilience in Soft Ground
The Lake Texcoco region to the east of Mexico City is famed for its deep lacustrine deposits of compressible clay, which amplify ground shaking during seismic events. The area is also gradually subsiding...

Photogrammetry for Rock Engineering: A Snapshot of State-of-the-Art Rock Mapping
Generally speaking, photogrammetry is the science of turning photographs into 3D models. While flashy advertisements may convey the idea that it's as simple as pushing a button (e.g., on a drone remote)...

The Rise of UAVs Signals a New Era in Geotechnics: Big Data in Geotechnics is Coming from Above
If you have been following the news, browsing the internet, or even gazing up in the sky, it is likely that you have seen an Unmanned Aerial Vehicle (UAV), also commonly known as Unmanned Aircraft System...

Innovations in Geosynthetic Rolled Erosion Control Products: From Forests to Fibers
Over the last 50 years, many different types of geosynthetic rolled erosion control products (RECPs) have emerged, ranging from different structure types to different fiber types. Natural-fiber...

Achieving Success and Avoiding Failures with Permeable Pavements
This chapter provides experienced-based recommendations on how to achieve success with permeable pavements. This information is based on an informational survey completed by designers,...

Quality Assurance/Quality Control
The contract between the purchaser and the supplier shall state the responsibilities of each party and the conditions under which the work will be accepted or rejected....

Site Conditions
The owner and the engineer should visit the proposed site during the initial planning phase and periodically throughout design to identify site conditions and constraints. A survey of...

Detailed Site Investigations
This section addresses site investigation issues that are important for detailed design and construction of microtunneling projects. These site investigations include the following: Geotechnical...

Construction Support Services
A preconstruction survey of existing structures within the anticipated construction zone of influence should be conducted before any construction begins. A plan for structures that need...

Instrumentation and Monitoring
A detailed plan for monitoring possible ground surface movements caused by the microtunneling operations should be prepared. The plan is typically prepared by the engineer in consultation...

Advanced Fracture Control Procedures for Deepwater Platforms and Compliant Towers
This paper describes an integrated approach to fracture control problems – applied first as a necessary adjunct to the authors' own engineering practice, then in developing...

Condition Indices, Performance Measures, and Managing Performance Data for Geotechnical Asset Management – Don't Get Buried!
Why don't transportation agency assets like pavements, bridges, and earthwork have a Check Engine light? Why can't you simply pull up the complete history and...

Improving Construction Quality by Seeing What's Hidden Underground
One of the challenges of deep foundation projects is the inability to see what's being built at depth. Construction is hidden below ground, in soil or rock conditions that...

The Science, Information, and Engineering Needed to Manage Water Availability and Quality in 2050

Evaluation of the KeySystem II Retaining Wall
By Keystone Retaining Wall Systems, Inc. with TenCate Geosynthetics Geogrid Reinforcement
Prepared by the Highway Innovative Technology Evaluation Center (HITEC). This report describes a HITEC evaluation designed to determine the basic capabilities...

 

 

 

 

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