Earthquake liquefaction potential at Patoka Dam, Indiana
Marcuson, William F. (William Frederick); Gilbert, P. A.
Miscellaneous PaperAbstract: A preliminary exploration of the damsite revealed foundation materials with extremely low penetration resistance. The site is in a seismic Zone 2 (Algermissen) and near the border of a seismic Zone 3. Consequently, a laboratory study wa.s conducted to evaluate the liquefaction potential of the foundation materials when subjected to an earthquake. To evaluate the liquefaction potential, undisturbed samples of the foundation soils were obtained using a fixed-piston sampler and drilling mud. The materials were found to be fine clayey sands, fine silty sands, fine sandy clays, and silty clays. The in situ dry density was determined to range from 88 to 104 pcf in the depths considered to be critical in regard to liquefaction potential. Cyclic triaxial tests were conducted on material representative of the five depths that were anticipated to be subject to liquefaction. Based on the results of these tests, the foundation is expected to liquefy if subjected to an earthquake of magnitude 6.5 with a peak acceleration of 0.17 g or greater. Logs of borings are given in Appendix A. A simplified procedure for evaluating liquefaction potential is given in Appendix B.
Soils and Pavements Laboratory (U.S.)Engineer Research and Development Center (U.S.)
Dam foundations; Earthquake resistant structures; Foundation investigations; Soil liquefaction; Patoka damsite; Patoka Dam; Earth fill dam; Indiana; Hydraulic structures; Earthquake effects
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