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This webinar was co-sponsored by ASCE's Geo-Institute (G-I) and ASCE Continuing Education

See other webinars on the topic of Grouting.

Instructor:  Michael J. Byle, P.E., D.GE, F.ASCE

Course Length: 90 Minutes

Purpose and Background

Carbonate and evaporite geologic formations underlie a large portion of the world.  These formations contain soluble compounds that result in portions of the formations dissolving over time to produce cavities, conduits, enlarged joints, caves, etc. The landforms resulting from these features are referred to as karst. Karst poses many geotechnical concerns such as subsidence, sinkholes, uneven structural support, high groundwater production, and groundwater sensitivity to contamination. Grouting is often used to mitigate many of these concerns.

Grouting in karst poses unique challenges due to the nature and distribution of karst features in the subsurface. There are a number of different grouting techniques that can be used effectively, but each has its own considerations and limitations. This webinar will present these methods and discuss measures for control the grouting program to optimize the benefit and minimize the potential for a performance failure and cost overruns. This webinar also discusses applications of jet grouting, limited mobility grouting, hot bitumen grouting, and others.

This presentation includes a brief introduction to karst and the implications for geotechnical grouting. It also discusses methods and strategies and provides examples for mitigating various aspects of karst.

Primary Discussion Topics

• Geotechnical issues in karst
• Mechanics of Grouting in karst
• Applications and limitations of various methods for grouting in karst

Learning Outcomes

Upon completion of this course, you will be able to:

• Develop an understanding of the interaction of grout and karst features
• Learn the key factors in controlling grout injections in karst
• Recognize the long-term versus short-term issues for grout performance in karst
• Develop an understanding of the mechanics of various types of grouting

Webinar Benefits

• Learn new solutions for age old problems associated with karst
• Learn effective approaches to mitigating karst issues with grouting
• Avoid costly errors that ensue from use of inappropriate grouting methods
• Find out the latest approaches to grouting in karst
• Learn the latest technology to effectively grout in karst

Webinar Outline

• Introduction to karst
• Geotechnical issues in karst
• Grouting mitigation strategies and mechanics
• Grouting methods for karst
• Investigation needs
• Grouting control and verification
• Example cases

Assessment of Learning Outcomes

Students' achievement of the learning outcomes will be assessed via a short post-assessment (true-false, multiple choice and fill in the blank questions).

Intended Audience<

• Geotechnical engineering consultants
• Geotechnical contractors
• Site development professionals
• Engineering geologists
• Structural engineers

How to Earn your CEUs/PDHs and Receive Your Certificate of Completion

To receive your certificate of completion, you will need to complete a short on-line post-test and receive a passing score of 70% or higher within 1 year of purchasing the course.

How do I convert CEUs to PDHs?

1.0 CEU = 10 PDHs [Example: 0.1 CEU = 1 PDH]