The total length of Lianhuashan tunnel of Pumei railway is 10.497km.
At about 10:00 on October 18, with the sound of a gun, the smoke filled the Lianhuashan tunnel of Pumei railway constructed by China Railway 17th Bureau, and the No.1 inclined shaft and No.2 inclined shaft section were officially connected, marking the overall connection of Lianhuashan tunnel. The
Pumei railway, with a total length of 556km, is one of the railway network planning projects in the Economic Zone on the west side of the Straits. It is an important part of the national railway network and the Haixi railway network, and an important trunk line connecting the Ganlong railway, the Changfu railway and the Hefu railway. There are two inclined shafts in Lianhuashan tunnel. Since the start of construction in January 2017, the main tunnel construction has been organized according to 4 working areas and 6 working faces including the entrance, exit and inclined shaft. On December 3, 2018, the entrance and inclined shaft section 1 will be connected, and on January 17, 2019, the exit and inclined shaft section 2 will be connected. The
Lianhuashan tunnel runs through Junkou town of Jianning county and Shuixi town of Ninghua County, with a total length of 10.497km and a maximum buried depth of 380m. It is the longest tunnel of Pumei railway, and bears the key task of the whole railway construction period. It is a control project of the whole line. Lianhuashan tunnel is the most complex control engineering tunnel in the construction of Pumei railway. Under the influence of regional structural factors, the tunnel site has developed fault and fracture structures, and there are 24 geophysical anomaly risk zones, including 5 class I and 19 class II anomalies. In March 2019, the daily water inflow of a working face is up to more than 10000 cubic meters, and the water in the tunnel is serious. Through the drainage of multiple pipelines day and night, the construction difficulties are overcome with all efforts.
in order to overcome the difficulties of many faults, frequent changes of surrounding rock, large amount of fissure water, complicated logistics organization of single track and single tunnel, and limitation of construction site in the tunnel, all the construction workers of China Railway No.17 Engineering Group Co., Ltd. strictly follow the principle of "first prediction, pipe ahead of time, strict grouting, short footage, strong support, early closure and frequent measurement", constantly optimize the construction scheme and orderly promote the tunnel. Road construction. Ninghua county power supply company of State Grid continues to promote the work of pairing and co construction with Pumei railway, cooperate with each other to ensure power supply and provide strong guarantee for railway construction. In view of the problems of long single track, small cross-section, long length and difficult logistics organization in the construction process, the construction workers adopt the complete set of tunnel tooling implemented by China Railway Corporation, and ensure the quality and progress of the tooling.
* * new Meizhou City railway to Jianning mountain from the northwest of Fujian Province. The line is drawn from the North Station of Jianning County, Puzhou railway. The Jianguan mountain station, which is built at Jianning, Ninghua, Qing Liu and Liancheng, ends at Ganlong line, with a total length of 162 km, with a total investment of 11 billion 96 million yuan. The daily passenger train is 16 pairs, with the annual maximum cargo flow density of 14 million tons. Among them, the railway in Ninghua is 39.2km long, with a total investment of 1.193 billion yuan. There are three intermediate stations, including huangshatan station, Shuixi station and Hewu station, which are designed according to electric traction and driving speed of 160km / h, and are expected to be completed in 2020. The
Lianhuashan tunnel is responsible for the construction period of the whole Pumei railway and plays a key role in the opening of the whole Pumei railway. The completion of the Pumei railway will further promote the economic development of the old revolutionary base areas and the Soviet areas along the line and help the people along the line to overcome poverty.