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Study on Method and Application of Geological Forecast in Tunnel

Author: ZhangCunLiang
Tutor: ZuoYongFeng
School: Xi'an University of Science and Technology
Course: Geotechnical Engineering
Keywords: Time-distance curve TSP reflected wave Minimum offset Advanced horizontal drilling forecast Integrated advanced geological forecast
CLC: U452.11
Type: Master's thesis
Year: 2011
Downloads: 97
Quote: 2
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Abstract


Tunnel geological prediction is an important guarantee for the safe construction of the tunnel . With the complexity and uncertainty of the geological conditions of the tunnel geological disasters have occurred, ahead forecasting is an important part in the tunnel construction . However , most of the existing methods of forecasting experience - based prediction , the prediction accuracy to be improved further . The main content of this study : ( 1 ) the physical and mechanical properties of the rock -based , with the time-distance curve analysis method to study the propagation characteristics of the reflected wave reflection interface . Reflected wave propagation characteristics according to TSP , a preliminary understanding of the high-quality production -like structure of the detection zone , and the minimum offset the smallest guns spacing optimization design . ( 2 ) combined the Dongtang ditch tunnel prediction instance , data acquisition , through the installation of sensors buried casing , blasting cap selection and dynamite source dose selection , optimization , optimal data acquisition program , provide a strong guarantee for the data processing . (3 ) on the impact of diamond drilling principle drilling process were analyzed , and combined with concrete examples of the impact of drilling forecast experience : normal drilling , drilling in rock powder smaller that the surrounding rock , rock integrity ; contrary surrounding rock joints and more crushing and development . (4) discusses the comprehensive advanced geological forecast principle , the steps of the integrated forecasting , early warning method of tunnel advance geological forecast . Comprehensive Advanced Prediction different means of forecasting techniques complement each other , learn from each other , confirm each other , areas with complex geological conditions is valuable , because any misjudgment will cause irreparable damage .

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CLC: > Transportation > Road transport > Tunnel project > Investigation, design and calculation > Survey > Tunnel engineering geological and hydrogeological investigations
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