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铁路隧道衬砌自1965年使用喷混凝土以来,迄今已完成约20公里。根据调查,质量状况,一般良好,尚未发现影响行车安全的病害。通过几年的实践,对它的性能有了初步认识,工艺有所改进,质量逐步提高。但由于施工经验和试验资料不多,目前尚难进入进行设计的阶段。为加快这一技术的发展,首先要对喷混凝土衬砌的作用原理、工艺要求和质量检验方法等问题,进行试验研究。 1973年7至11月,第四铁路工程局9205工
The railway tunnel lining has been completed to date about 20 kilometers since it was used in 1965. According to the survey, the quality condition is generally good, and no disease that affects traffic safety has been found yet. Through several years of practice, a preliminary understanding of its performance, technology has improved, and gradually improve the quality. However, due to the lack of construction experience and experimental data, it is difficult to enter the design stage. In order to speed up the development of this technology, we must first carry out experimental research on the action principle, technological requirements and quality inspection methods of shotcrete lining. From July to November 1973, 9205 workers of the Fourth Railway Engineering Bureau