Urban Tunneling Shield Construction Quality Control Under Complicated Environment

Along with the continuous increase of economic strength, in order to alleviate the increasing traffic pressure, the subway construction plays an important role in the city construction and development. Because the pace of development planning construction of subway line lagged behind the city, which often appear in new subway lines subway construction in the present stage is to through the existing municipal bridges, pipelines at the same time in order to avoid serious phenomenon, some sources of risk and the emergence of tunnel with small clear spacing or small radius construction condition. The existing municipal bridges, municipal pipelines, city building(structure) of buildings, subway line in the planning stage should try to avoid, to ensure that existing and new structure safety, avoid small radius, small spacing and through the ground structures of shield construction under complex conditions. But in the harsh conditions, cramped conditions, new subway lines the construction under complex conditions can hardly be avoided, in order to ensure the new subway construction safety, we will often encounter in the metro construction through the ground structures, small clear spacing, small turning radius and the shield in water rich sand layer receives is the key technology of quality control study, to guide the application of future similar projects.In this paper, taking Zhengzhou Metro Line 1 as the background, according to the 1 sources of risk through the shield construction process, through pipelines group and for building effects and the emergence of small spacing construction, through theoretical calculation and the proposed solutions, through the control of construction quality control measures, through the monitoring data the reaction quality control. Reasonable measures of quality control for Zhengzhou Metro in the future similar engineering plays a guiding significance.