Ứng dụng mạng lưới lò xo vào xử lý ổn định toàn khối nền đất yếu tại đồng bằng sông Cửu Long

Abstract

The purpose of this paper is to study the effectiveness of various soft soil improvement methods in the Mekong delta by modelisation. The shallow soil-cement mixing method was proposed and its performance can be evaluated by lattice spring model for many solids (LSMnS) that was extended  from the basic model (LSM) to determinate effective mechanical properties of porous media with one or many solid components. This model was validated by comparisons with the other existing models, the maximal difference was always less than 1.6 %. Various soil-cement mixed samples with different cement proportions were simulated to investigate their different physical properties in order to evaluate the shallow soil-cement mixing method. It is demonstrated that the effective bulk modulus Ke  and shear modulus Ge  are increased by 47 % and 50 %, respectively, when the cement proportion is equal to 13 %.