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地铁区间分离式隧道狭窄空间内整体道床浇筑逆作法施工技术

2018-09-19马瑞华

价值工程 2018年30期

马瑞华

摘要:通过对地铁单洞单线隧道整体道床普遍采用的轨排推进法施工工艺的研究,提出了在隧道底板上铺设正式轨排,作为轨道平板车运输的临时轨道,由远及近浇筑道床混凝土的新方法,即逆作法;并研发了轨行式混凝土泵管托架、轨行式三点布料漏斗、临时砂枕等实用工装,有效地解决了狭小空间物流组织困难、易损伤未达龄期道床、施工工效低、作业环境差、产生垃圾多等以往轨排推进法施工中存在的不足,在单线单洞隧道整体道床施工领域具有一定的推广价值,亦可用于高速铁路、轻轨等物流组织困难地段的施工。

Abstract: Through the study of the construction technology of the track pushing method commonly used in the monolithic track bed of the single hole single track tunnel of the subway, this paper puts forward a new method for the construction of a temporary track for the transportation of a track plate vehicle, which is a new method of building the concrete of the track bed from far and near, that is, the reversed construction method. The practical tooling of rail type concrete pump tube bracket, rail line type three point cloth funnel and temporary sand pillow has been developed, which effectively solved the shortcomings in the construction of narrow space logistics organization, easily damaged unage bed, low construction efficiency, poor working environment and more garbage. It has certain popularization value in the construction of monolithic track bed for single track and single tunnel,it can also be used for the construction of the difficult parts of the logistics organization of high-speed railway and light rail.

關键词:单洞单线;整体道床;永临结合轨道;砂枕;泵管托架;逆作法

Key words: the single hole single track;monolithic track bed;permanent and impending track;sand pillow;pump tube bracket;reversed construction method

中图分类号:U455 文献标识码:A 文章编号:1006-4311(2018)30-0134-03

0 引言

随着我国经济的不断发展和城市化水平的进一步推进,城市面临着越来越大的交通压力,交通拥堵日益严重,因城市轨道交通(地铁)自身具有的快捷性和便利性,使得地铁成为最现代化和最舒适环保的出行方式之一。

整体道床具有轨道平顺性好、整体稳定性高、刚度均匀性好、结构耐久性强、使用寿命长和养护维修工作量少等优点,已经成为国内外城市轨道交通的轨道结构主要形式。

目前,地铁隧道内整体无砟道床的施工方法普遍采用的技术为轨排法推进式施工[1]。由于城市地铁隧道内的施工作业空间狭小,大型机械设备无法运作,施工物流组织困难。多年来,普遍采用人工配合小型机械施工方式,导致了人工用量大、作业工效低、施工精度低、作业成本高、作业环境差等突出问题。……

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