Abstract:Underground project implementation is a large-scale dynamic system complicated with site condition and undefined property of rock and soil involved therein. Therefore,it brings much difficulty upon the analysis. In allusion to specific project implementation schemes and existing problems for excavation work,and based on the analysis of visualization for scientific computing,a visual data analysis method for soil mechanical parameters disturbed by construction is proposed with an algorithm of volume visualization by setting up an analytical approach of visualization to the mechanical parameters change of disturbed soil that is caused by project implementation. A proposed solution for the realization of visual expression in mechanical parameters for disturbed soil during project implementation,i. e.,V,volume visualization of voxel-based rendering (direct volume rendering),has been applied to the analysis of visualization of soil mechanical parameters disturbed by project implementation. Volume data set contains soil mechanical parameters outside foundation pit and 3D data of displacement field,i. e.,volume data set V that is a high dimensional vector field to be employed for visualization analysis of various construction parameters in various construction stages. A direct volume rendering method of excavation data analysis about anchor-abutment of Runyang bridge constructed by freezing excavation method is studied and some unusual problems have been found by visualization analysis of soil mechanical parameters disturbed by construction process. Volume data set of excavation work and the 3D structure have been set up. Almost all soil mechanical parameters and soil displacement fields have been involved in this volume data. The soil behavior at anytime of excavation stages is discussed. A complete visualization analysis system of soil mechanical parameters disturbed by project implementation is given for the purpose of studying the whole processes of soil mechanical parameters disturbed by project implementation during excavation with visualization analysis method. Practical application shows that launching of visualization analysis method into underground construction project is very imminent with significant results and it builds up a graphics linkage between man and data instead of written text or numerical tabulation.