Shield tunnel integral box culvert top surface slurry pipeline extension device and method

According to the shield tunnel integral type box culvert top face slurry pipeline extending device and method, the problem that arrangement of slurry pipelines of a slurry shield tunneling machine and subsequent construction of tunnel segments influence each other can be solved, and the risk that the slurry pipelines in a tunnel integrally slip off is avoided. The device comprises a pipeline extension mechanism, a movable slurry inlet pipe, a movable slurry outlet pipe, a slurry box, a box culvert unit slurry inlet pipe and a box culvert unit slurry outlet pipe, wherein first valves are arranged at the outlet ends of the box culvert unit slurry inlet pipe and the box culvert unit slurry outlet pipe; the pipeline extending mechanism is movably installed on a trolley at the rear end of the shield tunneling machine and communicated with a shield tunneling machine slurry inlet pipe and a shield tunneling machine slurry outlet pipe of the shield tunneling machine through slurry hoses. The front ends of the movable