为进一步加强引汉济渭秦岭隧洞工程投资的控制，确保陕西省引汉济渭调水工程按期完成，针对水利部概算“编规”的局限性，在现有法律法规和定额的基础上，重点研究了4个关键问题的解决方法： 1）“编规”对引水隧洞项目的划分较粗，无法满足秦岭隧洞工区多、费用组成复杂的要求，设计采用金字塔型分工区结构进行概算组织； 2）进口硬岩TBM掘进设备购置费高、断面单一，难以反复利用，“编规”仅在石方开挖单价中计取设备折旧费将使施工单位面临巨亏，设计采用折旧费由施工单位和业主分摊的方案达到了风险共担的目的； 3）秦岭隧洞最大独头通风距离达到16 km，超越了“编规”最大12 km的极限，设计采用二次曲线拟合，准确确定TBM轴流通风机调整系数； 4）“编规”中隧洞排水费已包含在临时设施费内综合考虑，不单独计列，无法适应多次穿越富水层的秦岭隧洞，设计根据预测涌水量和排水方案计算排水费，使概算合理，留有余地。

In order to further strengthen the investment control for Qinling Tunnel of Hanjiang RiverWeihe River Water Diversion Project and accomplish the project on schedule, the solutions of four key problems are studied based on the existing regulations and quotas, in view of the limitations of Regulations for Budget of Water Project Design, the Ministry of Water Resources of the People′s Republic of China. 1) The regulations cannot meet the requirements of Qinling Tunnel due to its coarse classification of water diversion tunnels. The pyramid structure is employed for budget estimation. 2) The cost of imported hard rock TBMs, most of which have a single cross section and can hardly be reutilized, is very high. In the regulations, the equipment depreciation is taken into consideration only in the unit price of rock excavation, leading to huge losses for the construction company. Thus, the equipment depreciation is shared by both the construction company and the owner, so as to achieve risk sharing. 3) The maximum deadend ventilation distance in Qinling Tunnel reaches 16 km, which is beyond the limit of 12 km specified in the regulations. The quadratic curve fitting is adopted to accurately determine the adjustment coefficient of TBM axial flow fan. 4) The cost of tunnel drainage in the regulations is included in the temporary facilities fee instead of independent budget. This is not applicable for Qinling Tunnel which passes waterrich strata several times. Thus, the drainage fee is calculated according to the predicted water gushing volume and the drainage scheme, which is more rational and allows for unforeseen circumstances.