Design method for built-in foundation of high and steep slope bridge

The invention discloses a design method for a built-in foundation of a high and steep slope bridge, which provides a more scientific design basis for the design of the built-in foundation and greatly improves the engineering economy of the built-in foundation. Comprising the following steps: (1) initially simulating building-in foundation design parameters; (2) calculating the lateral pressure P1 of the most unfavorable shear-resistant height below the anchoring surface according to the stress of the anchoring point; (3) calculating the shear capacity T of the rock mass in the most unfavorable height range below the anchoring surface; (4) judging whether the shear capacity T of the rock mass at the worst height below the anchoring surface is greater than the lateral pressure P1 at the worst height below the anchoring surface; (5) calculating the vertical allowable bearing capacity [P] of the built-in foundation according to the built-in foundation degree H determined in the step (4); (6) checking whether the