Engineering Business Card: Track Loop Project Overview: The total investment for the rail transit loop is about 34.2 billion yuan. The total length of the line is 51 kilometers, of which the underground line is about 42 kilometers long. There are 33 stations along the line, as well as 3 parking lots, 3 110 kV main substations and 1 control center. Construction period: Construction started at the end of October 2013 and completed in 2017. On May 1st, at the construction site of the Rail Transit Sports Park Station, workers Liu Zhiwei and his colleagues were holding “wind gunsâ€â€”rock drills to carry out the construction. The rock drills will go wherever hard rock will be drilled. hole. Can only dig 2 meters a day At 11 o'clock in the morning, the reporter entered an inclined shaft more than 20 meters deep underground. In the dim well, the air is muddy and the noise is loud. The journalist's feet are full of mud, and if he is not careful, he will fight. "Yeah, bang!" On the platform of the inclined mast up to 4 meters, Liu Zhiwei wearing a knee-deep water boots was drilling a hole in a rock drill. The relevant person in charge of the City Rail Group stated that the sports park station was designed as a second-floor underground excavation station. Before the station is built, an inclined shaft with a length of 510 meters must be dug as a passage for construction and transportation materials. During the excavation of the inclined shaft, taking into account the safety impact of surrounding residents' travel and blasting on the surrounding buildings, the construction adopted a drill-and-blast method, that is, artificial blasting and blasting of blastholes. The main task of Liu Zhiwei and his colleagues is to excavate inclined shafts and drill holes. Peng Yonghui, who is responsible for the construction of the track station of the sports park, said that the rock driller has a wind pipe and a water pipe. When the hole is drilled, the wind pipe gives power, and the water pipe is used to reduce the temperature of the rock drill. Peng Yonghui said that a worker can drill more than 20 blastholes a day, and this 6-meter-wide, 5.5-meter-high inclined shaft cross-section needs to drill more than 100 blastholes. After the blastholes are drilled, they are placed in the holes. Explosives. “Even if the explosives are opened, the project is still very difficult.†The relevant person in charge of the City Rail Group stated that since the start of construction in November last year, a maximum of 2 meters will be excavated each day, and the most difficult place can only be excavated 1 meter per day. Tired, dirty and injured are common The rock drill weighed 49 kilograms. When working, Liu Zhiwei needed another colleague to be his deputy. When drilling, the workers’ bodies will involuntarily shake with the drill bit. So, during most of the working hours of the day, their bodies are shaking. "After work, I often have the illusion that the body does not consciously shake up." Liu Zhiwei said. Not only that, injuries are also common. When you drill, you will inevitably fly debris, and accidentally splash it on your face. "Where it splashes, it loses a piece of skin wherever it is. These are all scars." Liu Zhiwei pointed to his left face. The reporter also noticed that Liu Zhiwei’s helmet was also stained with mud and his clothes were wet. “The water in the pipe is often spilled on the body. The uniform will be changed for a long time.†Liu Zhiwei said. After more than 10 years of dry excavation, Liu Zhiwei has seen a variety of geology: poor lithology, poor geological structure, poor geology, and aquifers. They can use the most reasonable method of construction according to their experience. How to select the drilling location, drilling angle, drilling depth, and how to clear the hole in the cross section, he has mastered the right, there is very little occurrence of cannon refilling. “Drilling boreholes, others feel tired, dirty, and dangerous. We are accustomed to it. In fact, tunnels cannot be wiped out, the rain can't shower, and the sun can't dry.†Liu Zhiwei said with a scorn that he couldn’t feel the spring, summer, autumn and winter cycle in underground construction. . In an instant, it was already at 12 noon and it was time for lunch. Liu Zhiwei and his colleagues packed up the rock driller and strode out of the inclined shaft. The sun, the blue sky, and the white clouds looked so dazzling... The orbital loop was opened to traffic at the end of 2017 “The entire ring line is expected to be ready for trial operation by the end of 2017.†The relevant person in charge of the City Rail Group said that by then, it will greatly facilitate the citizens traveling around. According to reports, the rail transit loop will be connected in series with the Shapingba Formation, Guanyinqiao Formation, Renhe Formation, Nanping Formation, and the Da Yangshi Formation. The Shapingba Railway Station, Chongqing North Station, the 4km long-distance hub, Chenjiaping Passenger Station, and Chongqing West will be connected. Stations and other large passenger flow distribution points. The maximum capacity of the vehicle is 2,700 passengers. Compared with the 6 trains currently in operation on Line 1, the number of passengers carrying more than 50% of passengers. For the public, transfer is more convenient. Of the 33 stations in the orbital loop, 13 stations have transfer functions. For example, transfer at the Olympic Sports Center Station and the No. 5 feeder line, transfer at the Erlang Station to the No. 12 line, transfer at the Chongqing West Railway Station with the No. 5 and No. 12 lines, and at the Shapingba station, the No. 1 line and No. 9 Line transfer and so on. According to the City Rail Group, there are bus stops, parking lots, and other supporting transportation facilities planned at the station along the track, which can be easily connected with other modes of transportation to effectively relieve traffic pressure. This article is a reprint of online media. It only represents the author's point of view. It has nothing to do with this site. If news articles and comments infringe your legal rights, please call us and we will handle it in a timely manner. Razor Barbed Wire,Plastic Barbed Wire,Galvanized Barbed Wire,Steel Razor Barbed Wire Anping Xinlong Wire Mesh Manufacture Co.,Ltd. , https://www.xinlongfence.com