G MS THESIS_final version_Maxim Prokudin.pdf - Digital Repository ...

124C(I) + C(K) - Stress-SettlementStress-settlement results for groups of cement type I and type K piers are plotted in Figure 82through Figure 89. The testing was performed similarly tot eh testing of groups of aggregatepiers.The groups of two, four, five and six piers were tested, as well as unit cell and a single pier.All the groups of piers were constructed and tested at 305 mm and 610 mm length except forthe 610 mm group of four piers, where the test was omitted and replication of the testresulted in no particular success. The replication of similar matrix soil conditions wascomplicated by inability to recreate same level of matrix soil compaction and moisturecontent.A single tell-tale plate was installed for each group of piers. A great amount of piermovement was anticipated due to a plunging mechanism of failure. Piers were loaded to alevel of 12 mm of total top of the pier displacement.The same steel cover plates were utilized for the purpose of loading and uniform distributionof applied load. Similar to groups of aggregate piers tested in the previous stage, the plateswere placed in a neatly excavated footing area and a concrete cap was poured between theplate and the piers to provide a uniform load distribution.No load tests were performed on plates supported with unreinforced matrix soil at this stageof testing. Only single pier type of load test was performed on the unreinforced matrix soiland, therefore, no results are shown for the unreinforced unit cell, group of two, four, fiveand six plate stress-settlement tests on the unreinforced matrix soil.