Growing Up The Geological Hazards Of Tunnel Construction And Control Technology

With the foundational facilities construction development in China, for improving the highway aligment standard, realizing the transportation high-speed, heavy-carry, need to building a large number of long and large tunnel. But these tunnel usually through region with complicated geology term, construction geology hazards usually take place.lt serious influence the building of tunneLTherefore, advance geological prediction and estimate, geology hazards management became the most important lesson in the tunnel surveys and construction to settle.This paper base on the survey , design , construction and kinds of geology hazards in Dafengyakou tunnel, the longest tunnel in Yunnan province, the geology term of the zone it through is more complicated construction. With analyze and introduce advance geological prediction and estimate, The technology of control blasting and information construction, put forward the control mechanisms andmethods for the geology hazards of the long and large tunnel under the complicated geology term, obtaining the result in several aspects as follows:(1) Summarizing the current investigative result of the mechanisms and terms for normal geologies hazards, put forward the geology hazards occurrence is not only has something to do with topography and physiognomy, stratigraphic rock character, geology structure, but also the dynamic respond cause by the interference of the construction is the important factor for its occurrence;(2) the technique of advance geological prediction, as TSP to represent, is applied in tunnel engineering, its accuracy is high, hand over the information on time, the forecast distance is long and interference construction is so small, and effectively control with the geology hazards occurrence;(3) Base on the smooth surface blasting in Dafengyakou tunnel, putting forward a set of method for choosing the parameter of smooth surface blasting.Then argue effectively that the control blasting not only can shorten construction period, reduce the super owing dig the deal, but also able to protect surrounding rock at the same time, decreacing the rate geology disaster take place ;(4) The supervisement and the measurement, collections and handles information continually, feedbackinformation about the mechanics dynamic changes on the reunite construction that includes the surrounding the rock and support, so develop the surrounding the rock loading ability and provides the reasonable opportune moment for the second lining.This paper researched geology hazards and control mechanisms in long and large tunnel,which provides some reference values for design construction and further research in this realm.