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A Case on Excavation Plan and Design of Adjacent Railroad Tunnel  

김선홍 (㈜유신코퍼레이션 터널부)
정동호 (㈜유신코퍼레이션 터널부)
석진호 (㈜유신코퍼레이션 터널부)
정건웅 (㈜유신코퍼레이션 터널부)
서성호 (㈜유신코퍼레이션 터널부)
Publication Information
Explosives and Blasting / v.20, no.3, 2002 , pp. 59-71 More about this Journal
Abstract
The points of this design case are the planning and excavation method of a new double-tracked railroad tunnel which is approx. 11∼22 meters apart from existing single-tracked railroad tunnel. For the optimum excavation method some needs are required in design stage, such as the reduction of noise and vibration, public resentment, damage of buildings and construction costs. Hence the estimation and application of allowable noise and vibration criterion is important. The ground coefficient (K, n) of this site is determined by field trial blasting. The excavation method is chosen to satisfy the allowable noise and vibration criterion. In addition, in order to ensure the stability of existing single-tracked railroad tunnel, the instrumentation of maintenance level is accompanied during the construction stage. As a result of this design condition, central diaphragm excavation with line drilling and pre-large hole boring blasting is applied to the area within 15 meters apart from existing tunnel. And above 15 meters apart, pre-large hole boring blasting is designed.
Keywords
Excavation Method; Blasting Noise and Vibration; Field Trial Blasting; Ground Coefficient; Central Diaphragm; Pre-Large Hole Boring Method;
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