Abstract Views :139 |
PDF Views:136
Authors
Affiliations
1 Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environmental Monitoring, Ministry of Education, CN
2 School of Geosciences and Info-Physics, Central South University, Changsha, CN
3 Hunan University of Technology, Zhuzhou, CN
Source
International Journal of Earth Sciences and Engineering, Vol 9, No 4 (2016), Pagination: 1839-1844
Abstract
Elastoplastic numerical calculation model for three dimensional finite element for tunnel is set up based on PLAXIS 3D and displacement prediction model for tunnel surrounding rock is established based on improved grey prediction theory; with stress distribution, strain pattern and displacement variation pattern in excavation process of tunnel analyzed, relation between parameter and deformation studied, calculation procedure and method for improved grey prediction theory presented so as to obtain settlement and displacement of arch crown in front of tunnel face within certain extent in tunnel excavation process by prediction. Suitong Tunnel is taken as test subject to carry out contrastive analysis relation among three displacement-time curves namely value of simulating calculation, predicted value and measured value and perform cross validation of the above mentioned three values. The validation result shows that the model is able to properly embody deformation pattern of surrounding rock, with prediction precision of displacement value satisfying requirement of specification and having larger scope of application in prediction of surrounding rock stability than that of other methods. The abstract section is mandatory, with a word limit of 200 words. The scope, aims, results and conclusions may be summarized here. Avoid inserting any reference in this section.
Keywords
Numerical Calculation, Grey Prediction Theory, Displacement Prediction, Tunnel Face.
Full Text
