Abstract：Research purposes: The railway project from Algiers to Oran in Algeria Constracted by China is an important part of road network ringing the Mediterranean Economic Zone in the north part of Algeria，with the total length of 55 km to connects the capital and main industrial areas． The 7． 342 km long Ganntas Tunnel is an important controlling engineering and passes through the low mountain area of Ganntas with complex topographic and geological conditions． Algeria had invited a number of survey institutions from Italy and France to research the geological survey for decades，but little achievements had been made． After winning the bidding by China in 2008，the comprehensive geological survey method was used for the geological survey of this railway by Chinese experienced senior technicians．
Research conclusions: The stratum，geologic structure and hydrogeological condition of the tunnel was found out，and the main parameters related to the RQD，Q max ，crack development and surrounding rock classification were gained． In accordance with the France surrounding rock classification method，the rock mass quality score of RMR was obtained，achieving very good results． The comprehensive geological survey methods should be widely used in foreign projects．
曹 峰，范春林. 综合地质勘察方法在甘塔斯隧道的应用实例[J]. 铁道工程学报, 2011, 28(8): 18-22.
CAO Feng，FAN Chun － lin. Application of Comprehensive Geological Survey Methods in Construction of Ganntas Tunnel in Algeria. 铁道工程学报, 2011, 28(8): 18-22.
China Railway First Survey and Design Institute Group Ltd． Geological Investigation Report of Ganntas Tunnel ［R］． Xi ＇an: China Raiway First Survey and Design Insitute Group Ltd，2011．
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2011, Vol. 28 
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