Lock catch steel cofferdam leaking stoppage construction method

The invention discloses a lock catch steel cofferdam leaking stoppage construction method. The leaking stoppage effect directly influences the safety and the construction period of follow-up bottom sealing and bearing platform pier body construction. The method is especially suitable for the construction area of the Yellow River extra-large bridge. Filling materials are obtained locally, funnel materials are processed by on-site excess materials, a vibrating rod is adopted for assistance in the filling process, the method is convenient and rapid to operate on site, plugging can be repeatedly and rapidly conducted again if leakage is found out at a certain position so that construction of the next procedure can be smoothly conducted, and meanwhile the effects of saving energy, protecting the environment and being free of pollution are achieved. The funnel and the PVC pipe used in the filling process are processed and modified according to existing materials, so that the cost is saved; operation and transfer ar