{"id":{"repo_id":"mit","oai_identifier":"oai:dspace.mit.edu:1721.1/46244"},"canonical_url":"https://search.dev.ndltd.org/etd/mit/oai:dspace.mit.edu:1721.1/46244","repository":{"repo_id":"mit","name":"MIT","base_url":"https://dspace.mit.edu/oai/request"},"display":{"title":"Characterization of consolidation and creep properties of Salt Lake City clays","abstract":"The reconstruction of the Interstate 1-15 highway embankments in Salt Lake City (SLC) involves the design and construction of bridges and embankments over 20 - 30 m of soft SLC clays. A surcharging scheme to overconsolidate the soft, layered foundation soils is required to reduce post-construction creep settlements. Seven Constant Rate of Strain Consolidation (CRSC), nine special Type B (surcharge) oedometer, two special Type C (reload) oedometer, 16 Ko-Consolidated phase of direct simple shear SHANSEP and six Ko-Consolidated phase of triaxial SHANSEP tests were run on radiographed tube samples to evaluate the consolidation and creep properties of the SLC clays. Comparison between the end-of-primary (EOP) compression curves from continuous loading and those from incremental loading shows that continuous loading gives higher values of the maximum virgin compression ratio (CRmax), especially for S-shaped compression curves on high water content clays. Continuous loading also provides more reliable estimates of preconsolidation stress ([sigma]'p). Data from 19 oedometer tests show that Ca/CR increases with increasing natural water content and has a mean value of about 0.042. The thesis presents correlations for predicting the reduction in creep rate of SLC clays as a function of the amount of surcharge (AOS). These correlations show greater benefit from surcharging than reported by Ladd (1989) for other cohesive soils. The thesis also contains correlations for predicting the long-term settlements of SLC foundation clays that are overconsolidated due to aging from prior embankment construction.","abstract_html":"The reconstruction of the Interstate 1-15 highway embankments in Salt Lake City (SLC) involves the design and construction of bridges and embankments over 20 - 30 m of soft SLC clays. A surcharging scheme to overconsolidate the soft, layered foundation soils is required to reduce post-construction creep settlements. Seven Constant Rate of Strain Consolidation (CRSC), nine special Type B (surcharge) oedometer, two special Type C (reload) oedometer, 16 Ko-Consolidated phase of direct simple shear SHANSEP and six Ko-Consolidated phase of triaxial SHANSEP tests were run on radiographed tube samples to evaluate the consolidation and creep properties of the SLC clays. Comparison between the end-of-primary (EOP) compression curves from continuous loading and those from incremental loading shows that continuous loading gives higher values of the maximum virgin compression ratio (CRmax), especially for S-shaped compression curves on high water content clays. Continuous loading also provides more reliable estimates of preconsolidation stress ([sigma]'p). Data from 19 oedometer tests show that Ca/CR increases with increasing natural water content and has a mean value of about 0.042. The thesis presents correlations for predicting the reduction in creep rate of SLC clays as a function of the amount of surcharge (AOS). These correlations show greater benefit from surcharging than reported by Ladd (1989) for other cohesive soils. The thesis also contains correlations for predicting the long-term settlements of SLC foundation clays that are overconsolidated due to aging from prior embankment construction.","abstract_has_math":false,"creators":["Ng, Nicky Si Yan, 1974-"],"institution":"Massachusetts Institute of Technology","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":"Massachusetts Institute of Technology. Department of Civil and Environmental Engineering","school":null,"contributors":[],"advisors":["Charles C. Ladd and John T. Germaine."],"committee_chairs":[],"committee_members":[],"year":1998,"date_issued":"1998","date_published":"1998","updated_at":"2026-07-22T22:21:57Z","subjects":["Civil and Environmental Engineering"],"languages":["eng"],"rights":["M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission."],"rights_urls":["http://dspace.mit.edu/handle/1721.1/7582"],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/1721.1/46244","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Charles C. Ladd and John T. Germaine."]},{"key":"dc:contributor.department","label":"Department","values":["Massachusetts Institute of Technology. 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They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission."]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://dspace.mit.edu/handle/1721.1/7582"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/1721.1/46244"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1998.","Includes bibliographical references (v. 1, leaves 184-187)."]},{"key":"dc:description.abstract","label":"Abstract","values":["The reconstruction of the Interstate 1-15 highway embankments in Salt Lake City (SLC) involves the design and construction of bridges and embankments over 20 - 30 m of soft SLC clays. A surcharging scheme to overconsolidate the soft, layered foundation soils is required to reduce post-construction creep settlements. Seven Constant Rate of Strain Consolidation (CRSC), nine special Type B (surcharge) oedometer, two special Type C (reload) oedometer, 16 Ko-Consolidated phase of direct simple shear SHANSEP and six Ko-Consolidated phase of triaxial SHANSEP tests were run on radiographed tube samples to evaluate the consolidation and creep properties of the SLC clays. Comparison between the end-of-primary (EOP) compression curves from continuous loading and those from incremental loading shows that continuous loading gives higher values of the maximum virgin compression ratio (CRmax), especially for S-shaped compression curves on high water content clays. Continuous loading also provides more reliable estimates of preconsolidation stress ([sigma]'p). Data from 19 oedometer tests show that Ca/CR increases with increasing natural water content and has a mean value of about 0.042. The thesis presents correlations for predicting the reduction in creep rate of SLC clays as a function of the amount of surcharge (AOS). These correlations show greater benefit from surcharging than reported by Ladd (1989) for other cohesive soils. The thesis also contains correlations for predicting the long-term settlements of SLC foundation clays that are overconsolidated due to aging from prior embankment construction."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["S.M."]},{"key":"dc:title","label":"Title","values":["Characterization of consolidation and creep properties of Salt Lake City clays"]}]}],"canonical_facts":{"dc:contributor.advisor":["Charles C. Ladd and John T. Germaine."],"dc:contributor.department":["Massachusetts Institute of Technology. Department of Civil and Environmental Engineering"],"dc:creator":["Ng, Nicky Si Yan, 1974-"],"dc:date.accessioned":["2009-06-30T18:25:04Z"],"dc:date.available":["2009-06-30T18:25:04Z"],"dc:date.issued":["1998"],"dc:description":["Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1998.","Includes bibliographical references (v. 1, leaves 184-187)."],"dc:description.abstract":["The reconstruction of the Interstate 1-15 highway embankments in Salt Lake City (SLC) involves the design and construction of bridges and embankments over 20 - 30 m of soft SLC clays. A surcharging scheme to overconsolidate the soft, layered foundation soils is required to reduce post-construction creep settlements. Seven Constant Rate of Strain Consolidation (CRSC), nine special Type B (surcharge) oedometer, two special Type C (reload) oedometer, 16 Ko-Consolidated phase of direct simple shear SHANSEP and six Ko-Consolidated phase of triaxial SHANSEP tests were run on radiographed tube samples to evaluate the consolidation and creep properties of the SLC clays. Comparison between the end-of-primary (EOP) compression curves from continuous loading and those from incremental loading shows that continuous loading gives higher values of the maximum virgin compression ratio (CRmax), especially for S-shaped compression curves on high water content clays. Continuous loading also provides more reliable estimates of preconsolidation stress ([sigma]'p). Data from 19 oedometer tests show that Ca/CR increases with increasing natural water content and has a mean value of about 0.042. The thesis presents correlations for predicting the reduction in creep rate of SLC clays as a function of the amount of surcharge (AOS). These correlations show greater benefit from surcharging than reported by Ladd (1989) for other cohesive soils. The thesis also contains correlations for predicting the long-term settlements of SLC foundation clays that are overconsolidated due to aging from prior embankment construction."],"dc:description.degree":["S.M."],"dc:identifier.uri":["http://hdl.handle.net/1721.1/46244"],"dc:language.iso":["eng"],"dc:publisher":["Massachusetts Institute of Technology"],"dc:rights":["M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission."],"dc:rights.uri":["http://dspace.mit.edu/handle/1721.1/7582"],"dc:subject":["Civil and Environmental Engineering"],"dc:title":["Characterization of consolidation and creep properties of Salt Lake City clays"],"dc:type":["Thesis"]},"updated_at":"2026-07-22T22:21:57Z"}