Application report for commencement of highway bridge and culvert works
There are 5 culverts in this section, including 2 slab culverts and 3 circular pipe culverts. Gravel cushion is used for culvert cushion, C20 concrete is used for tunnel body, cap stone and end wing wall, C30 concrete is used for cover plate and pipe joint, and M7.5 mortar rubble is used for cone slope and foundation. Main construction contents: culvert foundation, abutment body, end wall, cover plate, cap stone, paving, water retaining wall, abutment backfill and ancillary works. Overall construction sequence: foundation pit excavation → foundation soft soil treatment → foundation formwork installation → foundation concrete pouring → abutment body formwork installation → abutment body concrete pouring → abutment cap formwork installation → abutment cap concrete pouring → slab formwork installation → slab concrete pouring → end wing wall formwork installation → end wing wall concrete pouring → waterproofing and ancillary construction → abutment back backfilling