Study On Rapid Construction Technique Of Jindong Tunnel

Jindong tunnel is one of the most important elevenconstructions throughout country, with a length of 9108 meters.It belongs to Yuhuai Railroad. It has a great deal of badengineering geology, including fracture, cleavage, karsts, mashgas, coal measure strata, rock boast shock and large distortionof soft rock. Because its geology conditions, structure is complex,and the construction is difficult, it adopts coattail design,which includes high technology.In this paper, many actual questions in construction arestudied. It presents large span construction on soft surroundingrock, and uses double pilots method instead of three pilots methodaccording to the mechanics of different constructions ways.Constructions technology and measure on mash gas, coal measurestrata, and high pressure natural gasare established, rapid technology of large span construction onsoft surrounding rock is settled better.Throughout the analysis of technology and economy, its workefficiency is high, and benefit is good. It is good to build hilltunnels, especially rapid construction of large span constructionon soft surrounding rock under complex geology conditions.