Prefabricated vertical drains(PVDs)are commonly used to shorten the drainage path for consolidation as part of the improvement of marine soft ground.Many studies that focus on the primary consolidation settlement of P...Prefabricated vertical drains(PVDs)are commonly used to shorten the drainage path for consolidation as part of the improvement of marine soft ground.Many studies that focus on the primary consolidation settlement of PVD-improved soft ground have been conducted;however,residual settlement has been scarcely investigated.Residual settlement is the net effect of secondary compression and the remaining primary consolidation and generally occurs while the facilities are operating.In this study,residual settlement was investigated using the measured field settlement data obtained from the surface settlement plate and multilayer settlement gauges.This study determined that PVD still has some effect on residual settlement and can reduce the settlement times.Residual settlement is only related to the PVD-improved soil layer and only occurs significantly in the middle zone of that layer over a few months.The middle zone may be related to the time delay of excess pore water pressure dissipation.This study concluded that the remaining primary consolidation in the PVD-improved soil layer is the primary cause of residual settlement,whereas secondary compression in the PVD-improved soil layer is only a minor cause.展开更多
Albert Einstein is credited with saying, “Insanity: doing the same thing over and over again and expecting different results.” Then in the 1980s, we watched as poor Bill Murray kept waking up to the very same day, v...Albert Einstein is credited with saying, “Insanity: doing the same thing over and over again and expecting different results.” Then in the 1980s, we watched as poor Bill Murray kept waking up to the very same day, very same activities, and same exact results in the comedy “Groundhog Day”. We challenge you to look at the process of design, delivery, and operations for our buildings. Are we all stuck in “insanity” or “Groundhog Day?” We keep doing things the same way and expecting different results. This article explores how the utilization of facility data from design to operations can not only break the paradigm of “insanity,” it can make our facilities more efficient and sustainable to construct and operate. Our basic premise is that if you do not have accurate “data” about your facility it will be very difficult, if not impossible, to operate your facility effectively.展开更多
基金This research was supported by the Basic Science Research Program through the National Research Foundation of Korea(NRF)funded by the Ministry of Education(No.2020R1I1A3067248).
文摘Prefabricated vertical drains(PVDs)are commonly used to shorten the drainage path for consolidation as part of the improvement of marine soft ground.Many studies that focus on the primary consolidation settlement of PVD-improved soft ground have been conducted;however,residual settlement has been scarcely investigated.Residual settlement is the net effect of secondary compression and the remaining primary consolidation and generally occurs while the facilities are operating.In this study,residual settlement was investigated using the measured field settlement data obtained from the surface settlement plate and multilayer settlement gauges.This study determined that PVD still has some effect on residual settlement and can reduce the settlement times.Residual settlement is only related to the PVD-improved soil layer and only occurs significantly in the middle zone of that layer over a few months.The middle zone may be related to the time delay of excess pore water pressure dissipation.This study concluded that the remaining primary consolidation in the PVD-improved soil layer is the primary cause of residual settlement,whereas secondary compression in the PVD-improved soil layer is only a minor cause.
文摘Albert Einstein is credited with saying, “Insanity: doing the same thing over and over again and expecting different results.” Then in the 1980s, we watched as poor Bill Murray kept waking up to the very same day, very same activities, and same exact results in the comedy “Groundhog Day”. We challenge you to look at the process of design, delivery, and operations for our buildings. Are we all stuck in “insanity” or “Groundhog Day?” We keep doing things the same way and expecting different results. This article explores how the utilization of facility data from design to operations can not only break the paradigm of “insanity,” it can make our facilities more efficient and sustainable to construct and operate. Our basic premise is that if you do not have accurate “data” about your facility it will be very difficult, if not impossible, to operate your facility effectively.
