ACL Project List

In order to compare the methods for the protection of the wall tops and the prevention of water penetration into the wall core, two types of caps were installed on top of the test wall:  1– a hard mortar and stone cap based on the Park’s current methods of stabilization, and 2– an experimental soft vegetative cap.  Temperature and moisture probes were installed to monitor and evaluate the performance of each cap, the wall masonry and surrounding ground/fill.


Environmental monitoring was carried out for one year beginning in the fall of 2008, in order to understand when and how moisture enters the test wall, and to evaluate the performance of the hard cap and soft cap.  Sets of probes were installed in each cap and in different layers, as well as at grade levels adjacent to the test wall.

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