The main HZMB finally start paving is expected by the end of November to complete
Original title: HZMB main works in the final section of the road pavement is expected to be completed at the end of November began yesterday (13 days), the Hong Kong Zhuhai Macao bridge main project officially began operations last section of the road pavement. CCTV reporter Zhang Lei: I am now located in the Hong Kong Zhuhai Macao Bridge submarine tunnel, the construction site behind me is the ongoing submarine tunnel pavement pavement operations. This section of pavement is also the last section of pavement construction work in the main project of Hong Kong Zhuhai Macao bridge. Hong Kong Zhuhai Macao Bridge Island tunnel pavement project leader Zhang Hong: this process, our image is called "wearing clothes" project. The main project of Hong Kong Zhuhai Macao Bridge is 29.6 kilometers long, consisting of three parts: bridge, island and tunnel. The 6.7 kilometer Island tunnel project is the key control project of the bridge. The deepest part of the tunnel is located below 40 meters of the sea surface. High temperature, high humidity and poor ventilation conditions have posed a great challenge to the "dressing" of the road. Hong Kong Zhuhai Macao Bridge Island tunnel pavement project leader Zhang Hong: we purchased a lot of large fans, blowing inside the tunnel, the entire tunnel as a one-way ventilation pipe. In view of the special environment inside the tunnel, we adopted warm mixing technology to reduce the temperature. Compared with the traditional asphalt pavement site, the tunnel pavement almost no obvious smoke production, just paving asphalt than traditional asphalt temperature decreased by tens of degrees. In accordance with the construction schedule, paving work will be completed by the end of November. Hong Kong Zhuhai Macao Bridge Island tunnel project chief engineer Lin Ming: the main project has basically been completed, large equipment has entered the field, is now in full installation. Another month or so, we can enter the joint commissioning test phase, by the end of the year has conditions for opening up, we have confidence. Difficult to overcome the 20 meters wide paver, China Hong Kong Zhuhai Macao bridge design life 120 years, of which, the design life of pavement for 15 years. In the lower reaches of the Pearl River Estuary, such as a high temperature, high humidity, high salinity environment, how to make the durability of the road to play the greatest role, is the focus of the bridge builders. To this end, the submarine tunnel pavement operations, engineers on the innovative use of a self designed and manufactured super large paver to solve this problem. CCTV reporter Zhang Lei: This is a pavement machine equipment tailored for the Hong Kong Zhuhai Macau bridge subsea tunnel pavement, this machine has a very vivid nickname - "Transformers" super large paving machine, it can be free and dynamic adjustment in 12 meters to 20 meters. The width of the tunnel width of the Hong Kong Zhuhai Macao Bridge is 12.5 meters, but the width of the tunnel entrance is 15.5 meters, and the connection between the bridge and the artificial island is 19.5 meters. The different specifications of the pavement, if use the traditional method to paving, with two sets of paver to work at the same time, it not only uniformity will decline, the joints will be generated and concurrent when the pavement is an important potential future durability. HZMB Island tunnel pavement engineering machine designer Qi Kailong: it is the biggest characteristic of a machine to replace the two machine, the whole a paving. The majority of domestic and foreign road is double machine and machine paving, and paver is inevitably a joint destruction of the uniformity of the original materials, easy formation of rutting, collapse, influence the life of the pavement. In addition, in order to solve the problem of uneven asphalt mixing in the super wide paving process, engineers have added two times mixing device to the super large paver in the paving process. HZMB Island tunnel pavement engineering machine designer Qi Kailong: this blade is forced extrusion feeding and unloading rolled material piled in aniseed when the edge is over, it is not uniform, we put the material inhomogeneous material through two stirring squeeze in the past to solve the stalls uniform shop problem. Two sets of parallel pavement can be changed into one-time full scale integral pavement, which not only solves the problem of evenness and mixing uneven, but also greatly improves the efficiency. At present, this kind of pavement paving equipment has been used in many highways and special super wide highway pavement in china. Editor: early Xiaohui