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In Situ Testing for Evaluation of Modulus Reduction and Damping of Municipal Solid Waste at a Hazardous Waste Landfill
Matasovic N.a, Zekkos D.b, Sahadewa A.c, Carlson C.P.d
a Geo-Logic Associates, Inc., Costa Mesa, 92626, United States
b Dept. of Civil and Environmental Engineering, Univ. of Michigan, 2016 GG Brown Lab, Ann Arbor, 48109, United States
c Civil Engineering Program, Bandung Institute of Technology, 514 CIBE Building, Bandung, Indonesia
d Geosyntec Consultants, Inc., Kennesaw, 30144, United States
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© 2018 American Society of Civil Engineers.This paper presents preliminary results of a field experimental program that was conducted to investigate the dynamic properties of municipal solid waste (MSW) disposed of and comingled with hazardous waste at a hazardous waste landfill in Southern California. The investigation was performed in the linear and nonlinear strain range. The linear portion of testing was performed by means of crosshole, downhole, and SASW sounding. The nonlinear portion of testing was performed under four normal stress levels applied as a proxy for testing at greater depths (i.e., at higher confining stresses). A static vertical load and cyclic loading in the horizontal direction were applied by means of mobile Vibroseis shakers owned and operated by NHERI@UTexas. At each testing location, vertical array pairs of three-component geophones embedded in MSW were used to record the response of waste to cyclic loading over a relatively-broad range of shear strain (0.001% to 0.2%). The experimental program also included trenching in the waste, in situ waste density measurement, and recovery of bulk samples for laboratory testing. The linear and nonlinear in situ testing results were interpreted in terms of normalized, confining-stress-dependent shear modulus. This information fills-in a gap in comparable, published data for a neighboring hazardous waste site with MSW of similar composition and age. A discussion about how to develop equivalent viscous damping curves from this data by means of engineering judgment and constitutive modeling is also provided.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text]This paper is based upon research supported by the National Science Foundation (NSF), Division of Civil and Mechanical Systems under Grant No. CMMI-1041566 and partially by Grant No. CMMI-097178 through participation of the NSF-funded NHERI@UTexas Equipment Site personnel. Any opinions, findings, conclusions and recommendations expressed in this paper are those of the authors and do not necessarily reflect the views of the NSF. The authors would like to thank Dr. Farn-Yuh Menq, Cecil G. Hoffpauir, and Robert Kent of the NHERI@UTexas Equipment Site for their contribution with in-situ testing. The contributions of Robbie Warner of Geo-Logic Associates who provided many valuable comments is also gratefully acknowledged.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1061/9780784481486.047[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]