Consolidation theory of homogeneous multilayer treatment by air-boosted vacuum preloading

Abstract Air-boosted vacuum preloading, composed of anticlogging vertical drains and an outer booster system, is a new foundation treatment method that is beneficial to accelerating soil consolidation by applying different pressures between soil and vertical drains. Based on the assumption of equal strain, the present paper has simplified the calculation model of the air-boosted vacuum preloading method. Combined with the Newman-Carroll equation, the analytical solution for the consolidation of the double-layer soil foundation is proposed using separation of variables. Moreover, the theoretical solutions of consolidation without well resistance and ideal wells were given, and a chart convenient for engineering practice was acquired. Results show that the setting of well diameter ratio should not be more than 10 in engineering practice. At present, the consolidation theory of air-boosted vacuum preloading is imperfect and only focuses on the reinforcement mechanism of single-layer foundation. Therefore, it is of great significance to perfect the consolidation theory of air-boosted vacuum preloading with multiple layers.

[1]  Jinshan Sun,et al.  Properties and numerical simulation for self-weight consolidation of the dredged material , 2020 .

[2]  Theodoros Triantafyllidis,et al.  Predicting undrained static response of sand with non-plastic fines in terms of equivalent granular state parameter , 2020, Acta Geotechnica.

[3]  Mengmeng Lu,et al.  Analytical Solution for Consolidation of Band-Shaped Drain Based on an Equivalent Annular Drain , 2019, International Journal of Geomechanics.

[4]  Yi‐Feng Chen,et al.  Plane-strain consolidation theory with distributed drainage boundary , 2018, Acta Geotechnica.

[5]  Junjie Zheng,et al.  Semi-analytical and semi-numerical method for plane strain consolidation of double-layer foundation considering stress paths , 2017 .

[6]  Lin-Shuang Zhao,et al.  Analytical solutions to the axisymmetric consolidation of a multi-layer soil system under surcharge combined with vacuum preloading , 2017 .

[7]  Yuanqiang Cai,et al.  Combination of vacuum preloading and lime treatment for improvement of dredged fill , 2017 .

[8]  Scott W. Sloan,et al.  Analytical solution and numerical simulation of vacuum consolidation by vertical drains beneath circular embankments , 2016 .

[9]  Y. Zhuang,et al.  Evaluation of Vacuum Preloading with Vertical Drains as a Soft Soil Improvement Measure , 2016, Soil Mechanics and Foundation Engineering.

[10]  Scott W. Sloan,et al.  A new analytical model for consolidation with multiple vertical drains , 2016 .

[11]  John T. Christian,et al.  New Approach to Analysis of Consolidation Data at Early Times , 2016 .

[12]  K. Xie,et al.  A study on the one-dimensional consolidation of double-layered structured soils , 2016 .

[13]  Jiankun Liu,et al.  A new approach to improve soft ground in a railway station applying air-boosted vacuum preloading , 2015 .

[14]  H. Ying,et al.  Pore Pressure Response to Groundwater Fluctuations in Saturated Double-Layered Soil , 2015 .

[15]  Koichi Maekawa,et al.  Seismic interaction of underground RC ducts and neighboring bridge piers in liquefiable soil foundation , 2015 .

[16]  Bin Shuai,et al.  Analysis on Topological Properties of Dalian Hazardous Materials Road Transportation Network , 2015 .

[17]  S. Ganesh Kumar,et al.  A Case Study of Vacuum Consolidation of Soft Clay Deposit , 2015 .

[18]  R. Vivas-Reyes,et al.  Radial Consolidation for equal strain with resistance in the vertical drain , 2015 .

[19]  P. Cleall,et al.  Consolidation of sensitive clays: a numerical investigation , 2013 .

[20]  M. Rahman,et al.  The effect of drained pre-shearing on the undrained behaviour of loose sand with a small amount of fines , 2013 .

[21]  Buddhima Indraratna,et al.  Soft ground improvement via vertical drains and vacuum assisted preloading , 2012 .

[22]  Zhang Gong-xin,et al.  Mechanism and numerical simulation of the "soil piles" in the fresh hydraulic mud fill treated by surface-layer improvement technique , 2012 .

[23]  D. T. Bergado,et al.  PVD improvement combined with surcharge and vacuum preloading including simulations , 2011 .

[24]  Dennes T. Bergado,et al.  FULL-SCALE EMBANKMENT CONSOLIDATION TEST USING PREFABRICATED VERTICAL THERMAL DRAINS , 2010 .

[25]  Hong Peng-yun.  Large-scale model tests on dewater of dredged clay by use of ventilating vacuum method , 2009 .

[26]  Ernian Pan,et al.  Displacements and Stresses Due to a Uniform Vertical Circular Load in an Inhomogeneous Cross-Anisotropic Half-Space , 2006 .

[27]  Buddhima Indraratna,et al.  Radial consolidation of clay using compressibility indices and varying horizontal permeability , 2005 .

[28]  G. J. Chen,et al.  Consolidation of multilayered half space with anisotropic permeability and compressible constituents , 2004 .

[29]  Jinchun Chai,et al.  Effect of hydraulic radius on long-term drainage capacity of geosynthetics drains , 2004 .

[30]  Jianguo Wang,et al.  State space solution of non-axisymmetric Biot consolidation problem for multilayered porous media , 2003 .

[31]  G. Imai,et al.  One-dimensional consolidation modeling based on the isotach law for normally consolidated clays , 2003 .

[32]  Peter H. Morris,et al.  ANALYTICAL SOLUTIONS OF LINEAR FINITE-STRAIN ONE-DIMENSIONAL CONSOLIDATION , 2002 .

[33]  Kanghe Xie,et al.  A study on one-dimensional nonlinear consolidation of double-layered soil , 2002 .

[34]  T Hongo,et al.  Pre-Failure Behavior of Deep-Situated Osaka Clay , 1998 .

[35]  Atsuo Onoue,et al.  Consolidation of Multilayered Anisotropic Soils by Vertical Drains with Well Resistance , 1988 .

[36]  S. Hansbo,et al.  CONSOLIDATION BY VERTICAL DRAINS , 1981 .

[37]  S. Hansbo.  Consolidation of fine-grained soils by prefabricated drains , 1981 .

[38]  R. Barron.  Closure of "Consolidation of Fine-Grained Soils by Drain Wells" , 1948 .

[39]  H. Gray.  Simultaneous Consolidation of Contiguous Layers of Unlike Compressible Soils , 1944 .

[40]  Nabor Carrillo,et al.  Simple Two and Three Dimensional Case in the Theory of Consolidation of Soils , 1942 .