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1966年到1967年期間,我們和原鉄路专业設計院,中国科学院工程力学研究所、清华、同济、建材科学研究院等兄弟单位一起,曾組成噴射混凝土战斗組,配合鉄道兵和二局等施工单位,在××綫的几座隧道內采用了噴射混凝土衬砌,总計完成近两千米,并进行了有关試驗。从而使我們对这項新工艺有了一些初步的認識。然而,我們的認識还是很不完整的——噴射混凝土衬砌的貭量如何?隧道交付运营后这些衬砌状态如何?能不能滿足工程要求?存在着那些問題?今后如何提高?还有待进一步总
From 1966 to 1967, together with former Kushiro Professional Design Institute, Institute of Engineering Mechanics of Chinese Academy of Sciences, Tsinghua University, Tongji Institute of Building Materials and other fraternal units, we formed a squirting jet concrete battle group, cooperating with the construction of road battles and second board Units, in the × × line of several tunnels using jet concrete lining, a total of nearly two kilometers completed, and carried out the test. So that we have some initial understanding of this new technology. However, our understanding is still quite incomplete - what is the mass of shotcrete lining? What are the lining conditions after the tunnel is delivered? Can the requirements of the project be met? Are there any problems? How to improve in the future?