This retaining wall failure occurred in Kuala Lumpur, Malaysia in 2009. The failure was caught on video, albeit with a crappy camera phone. But it’s well worth a look! Dave Petley of the Landslide Blog […]
Construction has started on the tunnel boring machine launch pit for the WSDOT SR 99 Tunnel Project (Viaduct Replacement). The 420 foot long pit is being constructed using secant pile retaining walls, with 2 rows […]
A retaining wall failed along the A13 autobahn in Schonberg, Austria. Few details are available at this point, but the wall did fall onto a passing truck, killing the driver. Snowmelt was likely a factor […]
Another case study from RetainingWallExpert.com, this one for the failure of a 38-ft high geogrid-reinforced modular block MSE retaining wall. They note that the failure of the retaining wall follows their typical recipe, ‘Just Add […]
The ARES wall system is a geosynthetic reinforced MSE wall with a concrete panel facing. Most concrete panel systems use metallic reinforcement. On this project, the on-site backfill soil did not meet electrochemical requirements for […]
A drilled pier wall is an example of a retaining wall that you might use when global stability or bearing capacity considerations preclude you from a shallow foundation for a conventional retaining wall. In this […]
Check out this dramatic photo of an excavator that toppled down a hill in Wellsley, MA adjacent to a commuter rail line. According the WickedLocal.com article, the operator was working at a construction site on […]
The photo of this failed SPL wall is pretty remarkable. It was discussed in a thread I came accross on EngTips.com. The originator of the thread (kleo) says he was involved from the contractor side […]
This summer, the National Concrete Masonry Association (NCMA) will release the third edition of its Design Manual for Segmental Retaining Walls (DMSRW) along with SRWall 4.0 software for the design of segmental retaining walls. SRW walls with higher wall heights often make use of geotextile or geogrid reinforcement putting them in the category of mechanically stabilized earth retaining walls or MSE Walls. The first edition of the manual was published in 1993 and is routinely used for everything from landscaping walls to multi-tiered commercial and residential retaining walls. This summer is shaping up to be a busy one for those in the retaining wall business as the FHWA NHI 2009 MSE Wall Manual is set to be released around the same time frame as well. Read on for more info on the DMSRW. (Screen shot by Gabriela Mariscal from NCMA via CE News)
In this part 2 of 2, various types of retaining walls are examined as possible alternatives in a side-hill retaining wall situation. These include conventional wall types such as CIP walls, MSE walls, gravity walls and soldier pile walls and some less conventional approaches such as lighweight concrete fill, hybrid soil-nail and geofoam wall systems, ground improvement and micropile walls.
Part 1 of this Side Hill Retaining Wall article covered the definition, significance, problems and failure modes, investigation techniques, analysis, and construction considerations of side hill walls. A PDF version is now available for download as well. Click through for the article and the download link!