Stability Criteria of Rubble Mounds on Soft Ground Improved via the Deep Cement Mixing Method

摘要

The construction of a rubble mound on soft ground, which was improved using the deep cement mixing method, was observed instrumentally and analyzed. To establish the design criteria for the rubble mound on the improved ground, two types of analyses of soil deformation behavior and slope stability were performed for various cases of rubble mounds on soft ground and backfills: the finite element method and the Bishop simplified method. Horizontal displacements and settlements at the rubble mound crests were analyzed as a function of the embankment safety factor. In addition, dimensionless displacement factors, R_x and R_y, are proposed to increase the adaptability of the analytical results in the field. The factors considered include soil displacements, such as horizontal displacement and settlement induced by a combination of rubble mound construction and improved ground. The analytical results show that soil movement increased considerably when the safety factor of rubble mounds was lower than 1.3. The suggested horizontal displacement and settlement critical values are given when the embankment safety factor is 1.3.View full textDownload full textKeywordsdeep cement mixing method, dimensionless displacement factors, horizontal displacement, safety factor of slope, settlement, soil improvementRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/1064119X.2010.514254