The Quality Control Of Key Nodes Box Culvert Jacking In Existing Lines Under Complicated Condition

With the continuous development of China’s high-speed railway,highway,China’s high-speed railway,highway has formed a huge network connecting all major cities.With the rapid development of economy,the rapid advance of urbanization,the large area around the city to transform the city,the expansion of urban area,the development of the new area and the old city also to the more.Upgrading the old road,urban expressway to build scale,cross multiple lines appear more and more in the city.Exiguous in the present city covers an area of great increasingly difficult to interchange to the appropriate location.In this complex environment,through the construction of box culvert jacking under development for nearly 80 years later,more and more applications and then renewed vigor.Although after years of development and expand the wear construction technology already quite mature,but in the modern city high-rise buildings,a variety of geological staggered,a variety of traffic line multifarious wear under the complex working conditions for jacking construction and working condition of the complex details of processing technology and the ability to control and look very young.In this paper,with the background of complex conditions,combined with the Jacking under analysis box culvert under wear in the construction of key section,and corresponding key nodes of the construction technology and quality assurance system through of the construction of common construction technology and technical points.Wear the three-ring rapidness of zhengzhou north ring under the railway engineering as the main case is introduced and summarized in a typical multiple lines cross,a variety of geological staggered,a variety of supporting requirements,more box culvert construction at the same time of wear under complicated conditions in jacking construction of key nodes,the division of key nodes and the corresponding construction technology and construction methods of detail processing;It introduces a new working pit surrounding structure without support reinforcement construction methods,as well as the principles and elements of this support construction methods,and by supporting the entire construction period of monitoring data to validate the Supporting Information on the surrounding structures and supporting effect work pits;Based on the actual engineering construction quality control management,summarized from the project with six sigma quality control management for the macroscopic control combined with PDCA cycle control method of new methods of quality management control theory,with a number of key nodes for quality control of the actual effect and engineering overall situation of the completion of the verification and application effect of this method of construction quality control management.