Study On Highway Tunnel Displacement Monitoring Measurement And Their Application

Based on the highway tunnel monitoring measurement research project in the expressway from Jiyuan to the Jincheng , combined displacement monitoring measurement which carried on in 436 cross sections of nine separated tunnels and one double-arches, this thesis has embeddedly studied the highway tunnel displacement monitoring measurement theory and the plan, the data processing and the management benchmark, the effect factors of wall rock displacement as well as their application in the tunnel engineering construction and drawed main results as follows:1. It is established that a set of practical effective displacement monitoring measurement management system and solved the lag problem of monitoring measurement information the effective, enabled the monitoring measurement information n to be applied in the first time.2. The thesis proposed the conclusion that used wall rock displacement rate of change combined the geological information for judgment of wall rock stability, replaced the traditional method which takes the final amount of wall rock displacement as the wall rock stability criterion.3. The displacement monitoring measurement about four kinds excavation method included terrace excavates, entire cross section, the double-arches tunnel and the drill hole excavates in advance to the highway tunnel has been concluded the analysis research along with the time and the spatial change, and has obtained the typical section wall rock displacement time effect and the three-dimensional effect rule in each kind of situation.4. The paper discussed the caused factors of wall rock displacement, and proposed the wall rock displacement of the highway tunnel related to not only geologic effects but also the design effects and construction effects and other factors.The geologic effectst is the main factor which influens wall rock displacement.5. The thesis concluded the method and the criterion using displacement monitoring information to change wall rock category, the change of construction methods, the forecast dangerous situation and the determination supports and protections opportunity. thorough research to the displacement monitoring measurement information in the actual project application。The project practice proved that the application research of this article for the Jijin expressway tunnel construction has achieved great social and economic benefits and It has the great promoted value.