日前，黄委会设计院小浪底设计分院的各项目负责人和技术人员在工地聚首，总结上半年经验，找出工作差距，对下半年的设计工作进行了研究．大家认为，上半年各项设计工作均较好完成．排沙洞无粘结后张预应力混凝土衬砌结构设计是首次在我国水利水电隧洞衬砌设计中采用的新技术 Recently, the heads and technicians of various projects of Xiaolangdi Design Branch of the Design Commission of the Yellowis Design Commission gathered at the construction site to sum up the experience in the first half of the year, identify the work gaps and conduct a study on the design work in the second half of the year. We all think that all the design work in the first half of the year was completed well. The design of sand-lining tunnel after unbonded post-tensioned prestressed concrete lining is the first new technology adopted in the design of water conservancy and hydropower tunnel lining in China