Abstract：
As a soft-rock shallow-buried tunnel passes through urban areas, surrounding residential buildings are disturbed and even damaged by vibrations that occur during blasting construction, and therefore, special damping measures are needed. Using the new Hongyan tunnel on the Chongqing hub railway as an example, tunnelling technology that combines a boom-type roadheader with smooth blasting is studied based on such mechanical equipment as the boom-type roadheader and milling machine adopted in tunnel construction. The results indicate that this combined boom-type roadheader and controlled blasting excavation method apparently reduces the construction vibrations and is applicable to the construction of tunnel sections with an overburden of 15~20 m, while a half-section fully-mechanized excavation method is suggested for the construction of tunnel sections with an overburden of less than 15 m.
XIE Da-Wen
.Experimental Study of Tunnelling Technology Combining a Boom-Type Roadheader with Smooth Blasting[J] MODERN TUNNELLING TECHNOLOGY, 2015,V52(3): 216-220
2015, Vol. 52 