Research On Excavation Methods Tecnology Optimization Base On Shallow Mining Excavation Tunnel

The decelopment of underground railway which has played certain promoter action to people's life and society's progress enormous alleviate traffic jams of city ground.But the construction technique question,all the time, has been the diffcult question in the tunnel construction.how to carry on the subway tunnel construction, as well as which reasonable way adopts to carry on the construction is the engineering comparison issue of concern.The article depending on the Shenyang subway engineering project and takeing the youth avenue-Huaiyuan gate area compartment's subway tunnel construction as the background,uses FLAC software carrying on numerical simulation analysis.In view of Shenyang's geological situation as well as the applicable scope and the characteristic of each excavated the way, The articl mainly design the entire cross section method, the two-sided wall guiding hole method and retain the nuclear subsoil terrace cultivation to carry on the simulation. In order to enhance the article persuasive power,the article carry on the simulation analysis againsting each kind of excavation method main stage, so that tunnel excavation met the question in the distribution department construction.The artical mainly take the wall rock stress, the monitored point displacement, the elastoplasticity region, the cable axle and the lining intenal force analyzes three excavation methods as the objective function the rationality, obtains the most superior excavation method under the Shenyang unique geological condition. Meanwhile, after obtain a reasonable method excavation, the article were optimized analysing on influence of advance, as the the scope of the small duct grouting direct relationship to the tunnel wall rock around the stability of the problem, so the article carry on simulated analysis on the scope of themall duct grouting, as that obtain the best reasonable scope of the small duct grouting. This numerical simulation of a parameter is subject to the survey was, in the article was a result, ty engineering practice, for there is value.The parameter of numerical simulation are obtained by the survey, so the result of the simulation have the truthfulness and reliabilit, meanwhile,there is valueble for the project.