Combined with the construction of Kelewan Tunnel, through advanced geological forecast, analysis of detection data such as vault subsidence, horizontal convergence, floor deformation and surface settlement, daily cons...Combined with the construction of Kelewan Tunnel, through advanced geological forecast, analysis of detection data such as vault subsidence, horizontal convergence, floor deformation and surface settlement, daily construction observation and construction investigation, this paper expounds the three-step construction technology and specific construction points in collapsible loess long tunnel. The application of this method gives full play to the utilization degree and advantages of space and machinery, realizes the rapid tunneling construction method on the premise of ensuring the construction safety of collapsible loess long tunnel, and at the same time, it better solves many technical problems in collapsible loess tunnel construction.展开更多
Cast-in-place box girder under construction at G ramp of Wenzhou-Zhuangzhuang junction crosses the A and B ramps at the same time. Facing the limited working space of two bridges crossing at the same time, the stress ...Cast-in-place box girder under construction at G ramp of Wenzhou-Zhuangzhuang junction crosses the A and B ramps at the same time. Facing the limited working space of two bridges crossing at the same time, the stress of the bracket system is complex. How to realize the safe and rapid construction of the cast-in-place box girder without affecting the safety of the existing structure is of great significance. This paper calculates and demonstrates the design and construction of the bracket system of the cast-in-place box girder at the upper span. At the same time, it discusses the site cleaning, erection, preloading and other aspects in the construction process, illustrates the construction technical matters needing attention related to the construction of the expressway under construction, and ensures the safety quality and construction progress requirements of the site construction, hoping to provide some reference for the same type of buckle bracket on-span construction projects.展开更多
文摘Combined with the construction of Kelewan Tunnel, through advanced geological forecast, analysis of detection data such as vault subsidence, horizontal convergence, floor deformation and surface settlement, daily construction observation and construction investigation, this paper expounds the three-step construction technology and specific construction points in collapsible loess long tunnel. The application of this method gives full play to the utilization degree and advantages of space and machinery, realizes the rapid tunneling construction method on the premise of ensuring the construction safety of collapsible loess long tunnel, and at the same time, it better solves many technical problems in collapsible loess tunnel construction.
文摘Cast-in-place box girder under construction at G ramp of Wenzhou-Zhuangzhuang junction crosses the A and B ramps at the same time. Facing the limited working space of two bridges crossing at the same time, the stress of the bracket system is complex. How to realize the safe and rapid construction of the cast-in-place box girder without affecting the safety of the existing structure is of great significance. This paper calculates and demonstrates the design and construction of the bracket system of the cast-in-place box girder at the upper span. At the same time, it discusses the site cleaning, erection, preloading and other aspects in the construction process, illustrates the construction technical matters needing attention related to the construction of the expressway under construction, and ensures the safety quality and construction progress requirements of the site construction, hoping to provide some reference for the same type of buckle bracket on-span construction projects.
