李育朝
【摘 要】 随着国内高速铁路板式轨道的快速发展和先进的测量控制技术手段的使用,为地铁轨道工程的施工和发展提供了一个全新的思路和模式。但是地铁轨道不同于高速铁路,在设计技术标准、工况边界条件、环境减振降噪需求等方面存在着差异。为此,借鉴高速铁路无砟轨道技术,上海地铁尝试在12号线设计了1组9号单开预制板道岔,论文以该工程实践为背景,提出了地铁道岔预制板合理的设计尺寸,开发了地铁板式道岔数字化精调和自密实混凝土配合比设计、配置及灌注、板式道岔铺设成套技术,可为地铁板式道岔设计及施工提供借鉴。
【关键词】地铁板式道岔;自密实混凝土灌注;板式道岔精调
【中图分类号】U213.2
【文献标识码】A·B
Research and Application of Subway Slab Turnout Technology Track
Li Yu-zhao
(China Railway First Group New Railway Laying Corporation Xianyang Shaanxi 712000)
【Abstract】With the rapid development of domestic high-speed railway slab track and the use of advanced measurement and control technology, it provides a new idea and mode for the construction and development of subway track project. However, the subway track is different from the high-speed railway, there are differences in the design of technical standards, working conditions boundary conditions, environmental noise reduction requirements. To this end, drawing on the high-speed railway ballastless track technology, the Shanghai subway to try in the 12 line design of a group of 9 single open prefabricated slab turnout, the paper to the engineering practice as the background, put forward the subway switch prefabricated slab reasonable design size, The design and configuration of the subway slab turnout digital fine adjustment and self-compacting concrete mix design, configuration and perfusion, slab turnout laying complete sets of technology, for the subway plate turnout design and construction to provide reference.
【Key words】Subway slab turnout;Self - compacting concrete;Slab turnout fine tuning
1. 概述
京津、京滬高速铁路从德国引入18号、42号大号码板式无砟道岔,道岔板在工厂内分段预制,现场机械化铺设,精调到位后,灌注自密实混凝土,然后在其上铺设道岔钢轨件。经过工程实践,先后在沪杭、郑徐等高速铁路项目得到推广应用。地铁道岔区整体道床浇筑混凝土方量较大,要求一组单开道岔一次浇筑成形,工人劳动强度大,混凝土浇筑过程中对已精调到位的道岔轨排会产生扰动,影响道岔几何形位。考虑将高速铁路板式道岔的理念引入地铁,需要结合地铁特殊的工况条件进行板长、板宽的设计,并开发配套的道岔板运输、铺设、精调工艺和配套的工装。上海地铁12号线尝试设计了一组9号单开板式道岔,并在虹梅路站进行了试铺,取得了良好效果。……