Grouting lifting deformation based on energy method
1.School of Geoscience and InfoPhysics, Central South University, Changsha, Hunan 410083, China; 2.College of Mechanical and Electrical Engineering, Central South University, Changsha, Hunan 410083, China
Abstract:To solve the lifting deformation and damage of concrete covering caused by improper pressure control of dam grouting, based on the minimum potential energy principle, single and multiple holes grouting concrete covering models were respectively established to calculate the deformation of concrete covering. The stresses of soil and the concrete covering for single hole grouting were analyzed to establish single hole potential energy equations of concrete covering grouting lifting deformation. Based on the principle of minimum potential energy, the deformation value of grouting analytic solutions was estimated.The model was extended to multiple grouting hole to set up multiple holes grouting concrete covering uplift analytic model of deformation and to analysis the effects of casting parameters on the deformation. According to engineering example, ABAQUS finite element analysis software was used to establish a threedimensional finite element lifting deformation analysis model of concrete covering grouting for single and multiple holes. The results show that analytic solutions are well consistent with field experimental data analysis, which shows the effectiveness of analytic solutions.