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1974年3～4月,交通部铁路基建局、科技委组织了交通部科学研究院、第二、三铁路设计院、北京铁路局、第四铁路工程局、西南交通大学分别对丰沙线、××线和东北地区隧道的整体道床进行了调查,并综合以前对成昆线等隧道整体道床调查情况,提出以下几点认识。 一、对隧道内采用整体道床的估价
From March to April 1974, the Railway Infrastructure Bureau and the Science and Technology Committee of the Ministry of Communications organized the Scientific Research Institute of the Ministry of Communications, the Second and Third Railway Design Institute, Beijing Railway Administration, Fourth Railway Engineering Bureau and Southwest Jiaotong University, × × line and the northeast tunnel of the overall track bed were investigated, and integrated on the previous line of the Chengdu-Kunming tunnel ballast survey as a whole, put forward the following understanding. First, the tunnel in the overall assessment of the use of ballast