Member $299.00 | Non-Member $349.00
Sponsored by ASCE's Geo-Institute and ASCE Continuing Education.
INSTRUCTOR: Jerry A. DiMaggio, P.E., M.ASCE
The teleconference method allows the audience to see this webinar straight from my office, without having to travel. I have attended many ASCE webinars and find that ASCE knows how to put together an effective webinar. - Anonymous Attendee
Purpose and Background
In January 2009, ASCE initiated a new series of webinars that address the practical implementation of Load and Resistance Factor Design (LRFD) for geotechnical features. The series is broadly divided into two major areas: LRFD Fundamentals and LRFD Applications. The LRFD fundamentals are taught in a two-part webinar that includes discussion on basics of LRFD, loads, load combinations and limit states. The LRFD applications address a number of topics ranging from shallow foundations, deep foundations (drilled shafts, driven piles, and micropiles) and earth retaining structures (fill walls, cut walls, mechanically stabilized earth (MSE) walls and ground anchors). Also included among the applications topic is a 90-minute standalone webinar covering subsurface explorations and the testing and application of soil and rock tests. The subsurface exploration material presented in this cut walls webinar has application to all other application topics which address a specific type of geotechnical feature.
It is assumed that participants enrolling in any of the application focused webinars have a fundamental understanding of the design and construction of geotechnical features. Ideally, the participants should also have taken the initial two-part webinar on LRFD fundamentals.
This webinar offering concentrates on cut walls (top down construction). Cut walls have a wide range of applications and encompass a diverse range of wall families including sheet pile, post and panel, H-pile and lagging, slurry and soil mix. These walls resist lateral earth and water pressures through their structural stiffness and anchorages. The LRFD platform offers a rational framework for consideration of different types of walls. This webinar will use the American Association of State Highway and Transportation Officials (AASHTO) LRFD Bridge and Structures Specifications as a basis for the technical content. Applicable articles in Sections 11, 10 and 3 of the 6th Edition (2012) of AASHTO LRFD Specifications will be used as a basis of discussion.
The webinar will assume that the participant has a basic working knowledge of design and construction of cut retaining walls including fundamental aspects of earth pressure theories and earth pressure diagrams. It will include discussion on the terminology and types of cut walls, lateral earth pressure design approaches for cut walls, applicable load factors, use of minimum and maximum load factors for permanent loads, permanent and transient surcharge loads, identification of limit states and resistance factors, pressure surfaces for geotechnical and structural analysis, and consideration of extreme event limits state such as scour and seismic events. Introductory information on ground anchor application, construction and design of ground anchor walls in the context of limit states and general concepts will also be presented. A standalone webinar on ground anchor walls addresses the application of ground anchors in all types of cut walls in more detail.
Learning Outcomes
The webinar will help you perform external stability analysis to size cut retaining walls using the LRFD approach.
Seminar Benefits
- Learn basics of LRFD based analysis of cut retaining walls
- Continue building on the knowledge gained from previous LRFD webinars
- Examine the possibilities and benefits of improved communications between geotechnical and structural specialists for cut wall design
Intended Audience
The webinar will benefit professionals with 0-25 years of practical experience in analysis/design and construction of earth retaining structures. Basic knowledge of geotechnical principles, LRFD and earth pressure theories is a prerequisite.
- Geotechnical and structural specialists
- General civil engineering specialists involved in the selection, design and construction of cut retaining walls
- General and specialty wall contractors
Seminar Outline
- Terminology and types of cut walls
- Lateral earth pressures
- Consideration of surcharges
- Loads and load factors
- Failure modes and limit states
- External stability analysis for sheet pile, H-pile, slurry and soil mix walls
- Introduction to ground anchor application, construction and design
- Extreme events