Application of Pipe Shed Technology in Supper Shallow Buried and Large Span Incremental Launching Box Culvert

The soil covering on incremental launching box culvert in the city channel from Zhengzhou to Kaifeng is thin,while the span and the jacking length of the box culvert is the largest in China.To avoid moving with the box culvert,rupture,collapse and some other phenomena appearing to the pavement in the process of jacking box covert,the large pipe shed support technology can be adopted to protect the top when jacking box culvert.