1 / 6

Mitigating Issues with Shale Beds and Swimming Pools in Expansive Soils

Learn about challenges posed by expansive shale beds and swimming pools in expansive soils, and discover effective solutions to prevent differential heave and seepage issues. This case study from San Jose highlights the importance of proper drainage and membranes.

paulbryan
Download Presentation

Mitigating Issues with Shale Beds and Swimming Pools in Expansive Soils

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Part 6 SPECIAL PROBLEMS: SHALE BEDS and SWIMMING POOLS

  2. Shale lenses • One of the most vexing problems are discrete beds of expansive shale that often cross a developed pad • These seams will swell asymmetrically, as a function of effective normal force, as sketched here

  3. Differential heave is a major problem for highways wherever they cross inclined strata containing clay (upper left) • Similar phenomena can occur due to frost heave, shown at lower left

  4. Seepage from swimming pools constructed of porous gunite shells with water-cement ratios <0.45 can cause problems in expansive soils if structures are located close by, as sketched here.

  5. Case study of distressed home in San Jose, CA. Instrumentation showed that most of the swimming pool seepage percolated through the floor of the pool shell, but sufficient moisture seeping from one side caused soils to heave, as shown.

  6. The recommended solution included ample subdrainage around the gunite pool shell, and an HDPE membrane, sketched here.

More Related