Steel sheet pile foundation pit supporting system for abrupt slope excavation

The utility model relates to the technical field of abrupt slope excavation, in particular to a steel sheet pile foundation pit supporting system for abrupt slope excavation, which comprises a plurality of mutually connected supporting units, each supporting unit comprises a steel sheet pile, a cement mixing pile and I-shaped steel, and one side of the steel sheet pile is contacted with earthwork to be excavated; cement mixing piles are arranged on the other opposite sides of the steel sheet piles, and the steel sheet piles are tightly attached to the cement mixing piles; the I-shaped steel and the cement mixing pile are arranged on the same side of the steel sheet pile and are respectively arranged on two opposite sides of the cement mixing pile; two ends of the inner supporting beam are movably connected with the I-shaped steel and the steel sheet pile respectively. In the utility model, the steel sheet pile is arranged on one side of the cement mixing pile, so that the steel sheet pile plays a role in reta