Tunnel surrounding rock advanced horizontal water stop grouting construction method

The invention discloses a tunnel surrounding rock advanced horizontal water stop grouting construction method. The tunnel surrounding rock advanced horizontal water stop grouting construction method comprises the following specific steps that grouting holes are formed in the whole section and grouting is conducted, specifically, the grouting holes are formed in all soil bodies of an excavation area, an arch crown area around a tunnel, areas on two sides and an inverted arch area and grouting is conducted; in the process of forming the grouting holes, if water overflows from the grouting holes,drilling is stopped immediately, grouting operation is implemented, and after grouting is completed, the grouting holes are reformed at the original positions; if a new water overflowing situation occurs in the process of reforming the grouting holes, drilling is stopped again, grouting is conducted again, and the process is repeated until the depths of the grouting holes formed in the positionsmeet the design requiremen