With the strong support of relevant organizations in the tunnel industry and based on the existing statistical data,statistical analysis is made on 74 super-long highway tunnels over 10 km completed and in operation,under construction,and planned and designed as of 2023 in China.In which,there are 25 tunnels completed and in-operation,31 tunnels under construction,and 18 planned and designed tunnels.Statistical analysis is conducted from the aspects of length,province,highway,location,technical standard,construction method,designer,and contractor.The analytical results show that there are a total of 62 such tunnels with a length of 10-14.9 km each,10 with a length of 15-19.9 km each,and two with a length over 20 km each.These tunnels are mainly distributed in the southwest China,accounting for approximately 63%,and with the highest numbers in Sichuan and Yunnan provinces.There are 65 expressway tunnels,accounting for approximately 88%.There are 68 and six mountain and underwater tunnels,respectively.These tunnels are mainly subject to the two-way four-lane design and mainly constructed by drilling and blasting method.The combination method of TBM + drilling and blasting has emerged in these tunnels.There are 31 designers and 52 contractors,respectively.
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万方数据