... into a series of repeating unit cells. In this way, the typical unit cell is defined by taking a single PVD as its center and idealized as a circular domain to reflect its geometric equivalence. EPWP excess pore water pressure PVD prefabricated vertical drain PVTD prefabricated...

... empirical approach for calculating settlement in soft clay lumps improved by applying the VCM, estimating that settlement at a 90% degree of consolidation corresponds to 4%–9% of the prefabricated vertical drain installation depth. This finding should enable more accurate pre-construction predictions...

...J. Wang; R. Anda; H. Fu; X. Hu; X. Li; Y. Cai The vacuum consolidation behavior of dredged slurry improved by horizontal drainage-enhanced geotextile (HDeG) application was investigated. For comparison, vacuum consolidation tests using a prefabricated vertical drain (PVD) and layered prefabricated...

...Z. Zhang; G. Ye; H. Xing ABSTRACT: Soft soils may pose many challenges to construction of roadway embankments, such as low bearing capacity, excessive settlement, and slope instability. A combined method involving the use of deep mixed (DM) columns and prefabricated vertical drains (PVDs...

...F. Xu; J.-C. Chai ABSTRACT: The likely range of values of the maximum lateral displacement of the ground caused by embankment loading of a soil deposit improved by the installation of geosynthetic prefabricated vertical drains (PVDs) was investigated. This involved a study of 18 field cases...

... is an aluminum cylinder of 0.32 m inside diameter and 0.75 m high, was used to simulate the consolidation process of soft soils with a prefabricated vertical drain (PVD) at the center of the cylinder (Figure 1). The PVD-S allows a maximum percentage settlement of 41%, which is a typical value in very soft soils...

...J. Saowapakpiboon; D.T. Bergado; Y.M. Thann; P. Voottipruex ABSTRACT: This paper presents the effects of vacuum and heat preloading of a prefabricated vertical drains (PVD) that are used to accelerate consolidation of soft Bangkok clay. Laboratory model tests were conducted in small-scale...

...D.G. Lin; K.T. Chang ABSTRACT: A prefabricated vertical drain (PVD)-improved ground under embankment surcharge loading at the Second Bangkok International Airport was modelled using a three-dimensional finite difference program and proposed matching schemes. The matching schemes used an equivalent...

...D. Basu; M. Prezzi In the present study, the effect of soil disturbance on prefabricated vertical drain (PVD)-enhanced soft soil consolidation was studied using finite element (FE) analysis. Both square and triangular PVD installation arrangements were considered. The actual shapes of the PVD...

...D. Basu; M.R. Madhav Ground treatment of soft soil deposits by prefabricated vertical drains (PVDs) is a common practice in geotechnical engineering. The PVDs accelerate the consolidation process and help to rapidly increase the strength and stiffness of soil. Certain operational problems...

...A.L. Welker; R.B. Gilbert; J.J. Bowders Many different formulations for converting a prefabricated vertical drain with a rectangular cross section to an equivalent diameter well have been developed. In addition to equivalent diameter, engineers must also consider the impact of smear when designing...

...N. Miura; J.C. Chai This paper reports the long-term discharge capacities of four types of prefabricated vertical drains (PVDs) confined in clay. The results indicate that under clay confinement, the PVD discharge capacities significantly reduced with time. The discharge capacity reduction may...

...B.C. Rawes This paper studies the properties of prefabricated vertical drains (PVDs) that are the controlling factors in the specification of PVDs. The ASTM D 4716 standard test method has generally become the most widely used test method for measuring the discharge capacity of a PVD. In this test...

...D.T. Bergado; R. Manivannan; A.S. Balasubramaniam Filtration tests on soil-geotextile filter systems were conducted in the laboratory in order to evaluate the filtration and clogging performance of prefabricated vertical drain (PVD) geotextile filter jackets in soft Bangkok clay. Initially...