Foundation pit crossing pipeline suspension protection construction method

The invention relates to the technical field of underground pipeline protection, and provides a foundation pit crossing pipeline suspension protection construction method which comprises the following steps: S1, surveying and setting out to determine a foundation pit excavation sideline; s2, excavating an exploring groove and determining the position of a pipeline; s3, a supporting beam is erected above the foundation pit, a plurality of hanging beams are arranged above the supporting beam, the supporting beam is parallel to the pipeline, and the hanging beams are perpendicular to the supporting beam; s4, temporary working wells are excavated on the two sides of the pipeline, and the bottoms of the working wells are lower than the bottom of the pipeline A hole is drilled in the soil body at the bottom of the pipeline, after a lifting rope passes through the hole and bypasses the bottom of the pipeline, the two ends of the lifting rope are connected to the two ends of the corresponding lifting beam correspondi