Concrete structure is commonly used in the anchorages of a large cable-suspended pipeline crossing construction.With the increase of span and load,the stress on the concrete anchorages may rise rapidly.In case of trad...Concrete structure is commonly used in the anchorages of a large cable-suspended pipeline crossing construction.With the increase of span and load,the stress on the concrete anchorages may rise rapidly.In case of traditional anchoring structurefixed by anchor rods,concrete cracking will occur,thereby reducing the anchorage life.To solve this problem,the pre-stressed structure was designed to effectively improve the ef-ficiency of anchoring and reduce engineering cost.In the crossing construction of ChinaeMyanmar Gas Pipeline,the pre-stressed technology was used to establish an effective pre-stressed anchoring system,which integrates the pre-stressed structures(e.g.tunnel anchorages in the anchors)and the optimization measures(e.g.positioning mode,anchorage structure,concrete placement,pre-stressed,and medium injection),in line with the crossing structure and load features of this project.The system can delay the occurrence of concrete cracking and enhance the stress durability of the structure and anchoring efficiency.This technology has been successfully applied in the crossing construction of Chi-naeMyanmar Gas Pipeline,with good economic and social benefits,indicating that this technology is a new effective solution to the opti-mization of suspended pipeline anchorage structures,providing technical support for the development of pipeline crossing structure.展开更多
基金2011-2012 S&T project of CNPC Chuanqing Drilling Engineering Co.,“Study on Applicability of crossing construction technology in Chinae-Myanmar pipeline project”。
文摘Concrete structure is commonly used in the anchorages of a large cable-suspended pipeline crossing construction.With the increase of span and load,the stress on the concrete anchorages may rise rapidly.In case of traditional anchoring structurefixed by anchor rods,concrete cracking will occur,thereby reducing the anchorage life.To solve this problem,the pre-stressed structure was designed to effectively improve the ef-ficiency of anchoring and reduce engineering cost.In the crossing construction of ChinaeMyanmar Gas Pipeline,the pre-stressed technology was used to establish an effective pre-stressed anchoring system,which integrates the pre-stressed structures(e.g.tunnel anchorages in the anchors)and the optimization measures(e.g.positioning mode,anchorage structure,concrete placement,pre-stressed,and medium injection),in line with the crossing structure and load features of this project.The system can delay the occurrence of concrete cracking and enhance the stress durability of the structure and anchoring efficiency.This technology has been successfully applied in the crossing construction of Chi-naeMyanmar Gas Pipeline,with good economic and social benefits,indicating that this technology is a new effective solution to the opti-mization of suspended pipeline anchorage structures,providing technical support for the development of pipeline crossing structure.
