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| Study on Application of TSP Advanced Forecast in Tunnel Construction |
| YANG Feng, LI Zhi-hua, Shi Jian-lin |
| The Third Railway Survey and Design Institute Group Corporation, Tianjin 300251 ,China |
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Abstract Research purposes: The unfavorable geologic phenomenon, such as karsts，collapse, and water bursting etc.，are often encountered during tunnel excavation. In order to ensure the construction safety, the advanced geological forecast should be conducted. The TSP advanced forecast becomes one of commonly-used geological forecast methods at home and abroad because of its wide application scope，far forecast distance，high accuracy，simple operation, rich results ,less influence on construction and short forecast period.
Research conclusions: The TSP forecast technology was used for the Lijiaying Tunnel and it worked well. The forecast results proved that by using the TSP method, the geological conditions of the area within 100-150 meters in front of the working face of the tunnel could be well known timely, and also the forecast result could be sent timely. Meanwhile, the applicable procedures of TSP forecast method were so simple that it was possible to carry on the forecast work without the influence on the tunnel construction. With the TSP technology, the basis could be provided to the tunnel construction and parameter adjustments to guarantee the construction safety.
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Received: 13 August 2012
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2013, Vol. 30 
