Design method of pile-anchor-support combined supporting structure

The invention discloses a method for determining anchor rod arrangement and anchor rod length in a pile-anchor-support combined supporting system. The method comprises the following steps that 1, soil physical and mechanical parameters of a foundation pit of the pile-anchor-support combined supporting system and the excavation depth of each position are determined; step 2, selecting a section enclosure type of each area according to the characteristics of the foundation pit; step 3, section enclosure design; step 4, determining calculation parameters of the graphic design; 5, calculating a plane horizontal deformation curve of the enclosure structure; and 6, determining the arrangement length of the anchor rod. According to the method for determining the anchor rod arrangement and the anchor rod length in the pile-anchor-support combined supporting system, the pile-anchor-support combined supporting structure can be optimally designed, it can be ensured that deformation of all enclosure profiles meets the sta