Six shields on line 18 of guangzhou metro started

Recently, 6 shield tunneling machines of guangzhou metro line 18 from wanqingsha to hengli section, hengli to panyu square section, panyu square to nancun wanbo section, shaxi to pomegranate gang section have started, and line 18 has gradually entered the peak period of shield tunneling. At present, there are 12 shield tunneling machines on the whole line.
      Line 18 needs to run through 9 rivers and advance in complex mixed strata such as arry siltstone and granite. It passes through nansha - dongguan fault group, xinhui-shiqiao fault zone, baini - shawan fault zone, guangsan fault, and shougouling fault, etc. It also needs to run through railway tracks, etc. The surrounding underground pipelines are numerous and the environment is complex. Many obstacles above and below ground greatly increase the difficulty and risk of shield construction.
     In order to ensure the safety and stability of shield construction, all parties involved in the construction of guangzhou metro combined line set up a shield engineering construction management team, so as to ensure orderly and scientific construction in terms of timely preventing shield construction risks and solving shield construction problems. According to the characteristics of the line, the shield tunneling engineering construction management team led the development of the shield tunneling machine, the supervision and management methods of pipe segment production and a series of shield tunneling construction risk prevention measures. Through a comprehensive set up a sound system of the shield tunnel construction management, and good planning in advance of shield machine supervision, logoff acceptance, transport approach, such as work, such as organization of shield gunner shield construction special operations personnel to carry out the key job training, provides the shield construction technology and experience accumulation, standardize the management of the shield before starting work.
        In order to meet the safety requirements of high-speed train operation, line 18 adopts the single large shield tunneling of 8.8 meters, and other supporting facilities of the shield tunneling machine have also been greatly optimized. In order to improve the tunneling efficiency of shield tunneling machine, new technologies such as freezing cutter plate, on-line monitoring of cutter, continuous belt machine slag discharge and so on are adopted to ensure the normal tunneling over long distance in extreme complex strata. At the same time, the line relies on the supporting production of dry mix mortar, shield tail seal grease, foam agent and other collection and supply of the scientific and technological industrial park located in nansha by China railway construction south China construction company, which improves the overall construction efficiency.
       According to the construction plan, more than 40 shield tunneling machines will be installed at the same time on line 18 during the peak construction period, and the subway builders will further strengthen the safety and quality management, and promote the progress, green, ecological and civilized construction.
        Up to now, the civil engineering of line 18 has been completed by 21%. Among the 9 stations, 8 are for civil construction and 1 is for preliminary preparation. Of the 8 sections, 5 are for civil construction, and the entry line for longpillow is for civil construction. Wanqingsha car depot, longzhen parking lot for civil construction.