Abstract
During the jet grouting process, large volumes of high pressurized fluids injected into the soils will cause significant ground displacements, which may bring harmful impacts on surrounding environment. Therefore, it is essential to provide an accurate estimation of the ground displacement in the design stage. Based on multiple nonlinear regression (MNLR) and support vector regression (SVR), the prediction approaches are established, respectively. The column radius (Rc), Young’s modulus (E), and distance from column center to target point (LOA) are selected as the input parameters, while the displacement of target point A at the radial direction (δA) is taken as the output parameter. Comparisons results on the prediction performance of ground displacements indicate that the MNLR‐based approach has a better prediction effect. The design charts of the MNLR‐based approach for predicting the ground displacement are created, which will be helpful for the practicing engineers to get a quick estimation.
Highlights
Jet grouting is invented based on the combination of hydraulic mining technology and grouting technique and has become one of the most popular ground improvement techniques in different construction fields for preventing geohazards in worldwide area [1,2,3,4,5,6,7,8,9,10,11,12,13]
Because large volumes of high pressurized fluids are injected into the fine grained soils during the jet grouting process, it will cause significant ground displacements, which may bring harmful impacts on surrounding environment [36,37,38]. erefore, it is essential to provide an accurate estimation of the ground displacement in the design stage
Predicting the ground displacements caused by installing jet grouted columns is an important issue in the design stage of jet grouting, and large error in prediction may induce harmful results in engineering practice
Summary
Jet grouting is invented based on the combination of hydraulic mining technology and grouting technique and has become one of the most popular ground improvement techniques in different construction fields for preventing geohazards in worldwide area [1,2,3,4,5,6,7,8,9,10,11,12,13]. Most researchers mainly focused on the prediction of diameter and strength of jet grouted columns [39,40,41,42,43,44], and there are few published literatures related to ground displacement caused by installation of jet grouted columns. Shen et al [31] proposed a method to calculate the lateral displacements caused by installing vertical jet grouted columns in clayey soils based on the analytical solution developed by Verruijt [45]. Wang et al [8] proposed an approach to estimate the ground displacements caused by installation of horizontal jet grouted columns.
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