Directional secant pile grouting structure and directional secant pile grouting soil reinforcement method

The invention discloses a directional secant pile grouting structure. The directional secant pile grouting structure comprises a pile A and a pile B for building a secant pile wall, and further comprises a grouting system, wherein a circular steel cage is arranged inside the pile B; the grouting system comprises a grouting pump for output grout, a grouting pipe for conveying grout and grouting output pipes for reinforcing surrounding soil through compaction grouting; the grouting pump is connected with the grouting output pipe through the grouting pipe; a plurality of the grouting output pipes are arranged on the peripheral side surface of the steel cage of the pile B; a plurality of grout outlets are formed in the grouting output pipes; the grout outlets face to soil on one side which is required to be reinforced and the soil on one side is reinforced by grouting. The invention further discloses a directional secant pile grouting soil reinforcement method. The directional secant pile grouting structure and t