山区高速铁路桥梁墩台边坡防护接口技术研究

Study on Interface Technology of Abutment Slope Protection for High-speed Railway Bridge in Mountain Area

长昆高速铁路桥梁墩台边坡防护工点共有879处,桥路相接325处,桥隧对接85处,本线工程地形起伏较大,桥梁墩台边坡具有不连续单一性、空间性和极不规则性等特点,桥与路基、桥与隧道之间高陡边坡防护工程顺接的系统设计问题非常复杂。结合长昆高速铁路桥路、桥隧连接处以及桥墩之间高陡边坡顺接防护设计,提出了桥梁墩台边坡与相邻路基、隧道相接处边坡防护方案以及桥墩之间的边坡防护方案,通过设置挡土墙、桩板墙、防护桩等防护结构物以及调整顺接边坡起坡点位置,使桥路、桥隧、桥墩之间的高陡边坡顺接安全美观。

There are 879 work points of bridge pier and abutment slopes protection, 325 connections between bridge and subgrade and 85 connections between bridge and tunnel on Chang-Kun high-speed railway. The topographic relief of this line is large. The Abutment slope of the bridge has some special characteristics including discontinuous unicity, spatiality, irregularity and so on. The system protective design of the high-steep slope link between bridge and subgrade or tunnel is a much complicated problem. On the basis of the protective design of the high-steep slope connection between bridge and subgrade or tunnel, and between bridge piers on Chang-Kun high-speed railway, the protection scheme of the slope link between bridge and subgrade or tunnel and between piers is summarized. By setting retaining wall, slab-pile wall, protective piles and adjusting starting point of the slope in order to make the high-steep slope link between bridge and subgrade or tunnel, and between piles safe and beautiful.