Earth-structure Interaction Analysis for Subsidence Damage Mitigation.
Kane-WF; Triplett-TL; Yarbrough-RE; Murphy-EW
The Evolution of Abandoned Mine Land Tech : A Symp Proc Riverton WY6/14-16/89 PP 79-98 :79-98
Previous work on subsidence damage mitigation has centered on qualitative field studies to determine the effects of subsidence on existing structures, or on monitoring ground movements. While the importance of these studies cannot be overstated, the need for the analytical examination of earth-structure interaction is essential if any further progress is to be made on the problem. The U.S. Bureau of Mines study described herein follows a plan of observation, testing, and modeling which can be expanded as more information becomes available and conclusions are drawn. Results from the initial test foundations reveal the three-dimensional racking nature of subsidence movements, as well as the fact that the use of footing reinforcing can reduce permanent foundation damage. Interface testing has shown that a proposed damage mitigation technique, plastic sheet on sand, is effective in reducing stresses induced by drag, but that the less costly approach of simply putting plastic down before pouring the footing is more effective in reducing stresses. Finally, the use of simple computer models can provide insight into the mechanisms involved during subsidence, and provide a rapid method to proof-test theories and techniques before further field implementation. The flexibility that such an approach provides is extremely valuable in optimizing damage mitigation techniques in such a complex problem.
The Evolution of Abandoned Mine Land Tech.: A Symp. Proc., Riverton, Wy, 6/14-16/89, PP. 79-98