Risky Business: Identifying an Acceptable Rockfall Standard
For many parts of the U.S. highway system, cut slopes in rock are as common as bridges and embankments. These cut slopes, as well as some natural ones, produce rockfalls that pose risks to highway conditions...

Introduction
Many institutions and private industry organizations have prepared guidance documents with the latest scientific and engineering information on proper design, installation, maintenance,...

Design Considerations Common To All Permeable Pavements
Impervious cover in watersheds without controls result in increased stormwater runoff and decreased groundwater recharge in response to rainfall events. This increased runoff can be the...

Permeable Interlocking Concrete Pavement (PICP)
Permeable interlocking concrete pavement (PICP) consists of (impervious) manufactured concrete units that form permeable voids and joints, when assembled into a laying pattern. The openings...

Alternative Technologies
In recent years, new permeable pavement product variations have entered the market. This chapter describes general characteristics for several emerging products. The following types of...

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,...

Maintenance
While site selection and proper construction are the most critical factors in establishing that permeable pavements function as designed, all must be inspected and maintained to maximize...

Hydrologic and Hydraulic Design Methods
Computational methods for hydrologic analysis, hydraulic functions, and treatment capacity of permeable pavements vary depending on the complexity of the design and level of detail in...

Permeable Pavement Research Needs
The implementation of permeable pavement installations and practices are expanding and becoming more commonplace. With this increased usage comes expanded and improved information on design,...

Microtunneling Operation
The shaft should provide safe working conditions and fully support the ground. Jacking and receiving shaft support system and sizes are typically determined by the contractor. See Chapter...

Evaluation of Hail Suppression Efforts
The rationale for conducting project evaluations is to find out how successful the operations are in achieving the desired results. This assessment is more easily said than done. It is...

The Soil-Rock Boundary: What Is It and Where Is It?

Laterite - A Stable or Unstable Tropically Weathered Soil?

Summary of Approaches for Estimating Playa Lake Flooding
Playa, or terminal, lakes are common in semi- and arid environments; and their characteristic level, hard, and usually dry surfaces make them ideal for airports, as they are used in the...

Estimation of Curve Numbers for Concrete and Asphalt
All impervious surfaces are assigned a Curve Number (CN) of 98. However, no field or experimental evidence exists (to our knowledge) that shows why the impervious CN was assigned a value...

A Dynamic Climate Downscaling Prediction System for N.E. Brazil
The International Research Institute for climate prediction (IRI) is collaborating with several levels of government and various local and foreign researchers in several key disciplines...

The Big Dig's Big Dig
Widely recognized as the most demanding component of Boston's Central Artery/Tunnel Project, the tunnel jacking work performed beneath operating rail tracks represents a quantum...

Advances in Buoy Technology for Wind/Wave Data Collection and Analysis
Considerable advances have been made recently to reduce the cost of gathering meteorological and oceanographic data from coastal waters, especially for meteorological and oceanographic...

Foundations in Weathering Profiles from Igneous and Metamorphic Rocks

Side Shear of Large Diameter Drilled Shafts in Weathered Geomaterials

 

 

 

 

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