Existing pipeline fender post chiseling-away method suitable for pipe jacking method construction

The invention provides an existing pipeline fender post chiseling-away method suitable for pipe jacking method construction. The method comprises the steps that firstly, the invasion limit size is determined according to the size of a pipeline fender post invaded into a pipe jacking channel; secondly, the fender posts within the invasion limit size are constructed in different areas; 3, chiseling away the clearance-invading pipeline fender posts by using a pouring jacket method, positioning according to the clearance-invading size, and constructing a pouring jacket; 4, chiseling away the fender posts of the invasion limit pipeline in a gradual excavation mode; in other words, after construction of the pouring jacket is completed, firstly chiseling away the invasion-limiting pipeline fender posts at half of the height of the pouring jacket, then descending the pouring jacket, and continuing to chiseling away half of the remaining height until the pouring jacket is chiseled away to the outside of a pipe jacking