Laserfiche WebLink
TABLE B-2 - ESTIMATED SEISMICALLY -INDUCED COVER DISPLACEMENT <br />NORTH COUNTY RECYCLING CENTER AND SANITARY LANDFILL <br />LODI, CALIFORNIA <br />rrlCi>n.r AC(~FiC[~FC+_ 2002 as adanted from Brav and Rathie, 1998 and Brav et.al.,1998 Procedure) <br />Area <br />Critical Slope <br />�..-.-`.7 <br />Failure Wedge <br />to <br />Height (ft) <br />--mss <br />Static <br />F.S. <br />_-_ -----1----. <br />ky1�( <br />(g) <br />Average <br />Shear Wave <br />(3) <br />Velocity <br />(fps) <br />T,14I <br />(sec) <br />Tm t5(, <br />(sec) <br />T /T <br />8 m <br />MHEA <br />/MHA* <br />NRF (6) <br />DS -959 <br />(7i <br />sec <br />- <br />NRF cs( <br />MHEA cover*, <br />or h... <br />ky/k . <br />Calculated <br />(9) <br />Displacement , <br />inches <br />Assumptions: Design horizontal site acceleration in rock = 0.15g for M=6.8 MCE) event on the Great Valle 6-7 Fault at a distance of 47km from the site <br />MHA ro.k 0.159 <br />Proposed <br />Final <br />Cover <br />Cover <br />2 <br />NA <br />0.15 <br />800 <br />0.01 <br />0.55 <br />0.018 <br />I <br />16 <br />1.270 <br />0.24 <br />0.63 <br />0.7 <br />(1) From slope stability analysis. <br />(2) k, = yield acceleration obtained from pseudo -static slope stability analysis. <br />(3) Estimated from Bray et.al., 1998, Figure 3. <br />(4) T, = 4H/V, <br />where: H = Height of the failure surface in pseudo -static analysis <br />V,= Average shear wave velocity of the failure wedge <br />(5) Tm = Mean Period of the MCE as determined from data in Bray, et. al., (1998), Figure 2b. <br />(6) MHEA is the Maximum Horizontal Equivalent Acceleration of the potential failure mass in the slope. This is the same as k mar. <br />MHA is the Maximum Horizontal Acceleration for the MCE at the site. For this evaluation a value of 0.15 g is calculated. <br />Ratio MHEA/MHA*NRF obtained from Bray & Rathje, 1998, Figure 7b (rock site) or ASCE/SCEC, Fig. 11.2. This publication recommends this ratio need not be taken to be >1. <br />(7) D5-95 from Bray et. al., (1998), Figure 2c. <br />(8) NRF, Non-linear response factor from Bray and Rathje (1998). Figure 6b. <br />(9) From Bray and Rathje (1998), Figure 13. <br />*Includes a 1.25 magnification factor to account for 2-D effects for the cover per Bray, et.al, 1998, page 225-226. <br />References: Bray, J.D., E.M. Rathje, A.J. Augello and S.M. Merry, 1998, "Simplified Seismic Design Procedure for Geosynthetic-Lined, Solid -Waste Landfills," <br />Geosynthetics International, Vol. 5, Nos. 1-2. <br />Bray, J.D., and E.M. Rathje, 1998, "Earthquake Induced Displacements of Solid Waste Landfills," ASCE Journal of Geotechnical and Geoenvironmental Engineering, <br />Vol. 124, No. 3, March. <br />ASCE/SCEC, 2002, Recommended Procedures for Implementation of DMG Special Publication 117 Guidelines for Analyzing and Mitigating Landslide Hazards in CA. <br />