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Abstract: Jiangshuiquan tunnel, which is 8 lane tunnel with double holes, approximately 3100m in length, 170 to 207 square meters in excavation area, and 80km/h in the design speed, is located in Beijing-shanghai high-speed expressway. In consideration of large scale and tight schedule, a new excavation method named as ”steel-rock wall combined supporting method” is proposed, which is on the basis of CD...