Construction method of municipal rainwater and sewage separation pipeline

The invention relates to a construction method of a municipal rainwater and sewage separation pipeline. The construction method of the municipal rainwater and sewage separation pipeline comprises thesteps that first, a pipeline trench is excavated; second, a trench foundation pit is supported; third, a draining system in the trench is constructed; fourth, a concrete pipeline base is poured; fifth, the rainwater and sewage separation pipeline is mounted; sixth, an intersection of the rainwater and sewage separation pipeline is constructed; seventh, the trench is backfilled and compacted; and eighth, a steel sheet pile is pulled out. The construction method of the municipal rainwater and sewage separation pipeline has the beneficial effects that through a device arranged at a hole mouth toprevent soil from being carried out when the pile is pulled, the situation that the constructed pipeline is damaged due to the fact that too much soil is carried out when the pile is pulled after thetrench is constructed can b