Super-high backfill open hole structure for strengthening lateral restraint and construction method thereof

The invention discloses a super-high backfill open hole structure for strengthening lateral restraint and a construction method thereof. The super-high backfill open hole structure includes an open hole, the open hole includes side walls and an arch ring, the upper part of the open hole is backfilled with backfill soil, side slopes are arranged on the two sides of each side wall, transverse columns are arranged among the side walls and the side slopes, one end of each transverse column extends into the corresponding side slope, and the other end of each transverse column extends out of the corresponding side slope and is connected with the corresponding side wall. According to the construction method of the super-high backfill open hole structure, transverse excavating of a tunnel is conducted from the side walls on both sides of the open tunnel to the side slopes, backfilling of concrete is conducted on the interior of the tunnel to form the transverse columns, the transverse columnsare made to extend out of