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成都地下管廊建设的十八般武艺

2017-08-14 07:19:06   中国青年网

位于成洛大道的地下综合管廊模型。

三台“巨无霸”同时掘进,工业化预制拼装——

□本报记者 程文雯 文/图

供水管、燃气管、通信管……城市的地下和空中,有许多管线。过去,这些城市的“生命线”往往由管线产权单位各自实施、管理,各自为营、建管混乱,“马路拉链”和“空中蜘蛛网”屡见不鲜。

不过,在成都,这些问题正在逐渐解决。记者从成都市城乡建设委员会获悉,作为国家地下综合管廊试点城市,成都市目前正在实施地下综合管廊工程的项目有32个,总里长约71.7公里,总投资约85亿元。

这些工程进展如何?又是如何帮助城市实现管线科学管理的?8月8日,记者来到施工现场,探访成都地下管廊建设的十八般武艺。

国内直径最大的盾构综合管廊项目

在位于成洛大道的地下综合管廊项目施工现场,8号井口外,记者看到一个1:1的模型,展示出这段地下管廊将来是什么样。

据展示,整个圆形管廊外径9米,内径8.1米,内部分为上下两层,每层再划分出一大一小两个仓室,四个仓室从上到下、从左到右分别为“水电信舱”“高压电力舱”“燃气舱”和“输水舱”。入廊管线包括自来水、燃气、通信、电力、垃圾渗滤液管等。“四个仓室相互独立,即使某一仓室出现问题,也不会影响到其他仓室。”中铁十四局集团有限公司项目生产经理郭长龙介绍。

“这里是目前国内直径最大的盾构综合管廊项目。”城投集团驻现场代表陆江告诉记者。所用盾构机是一台外径9.33米,身长126米的“巨无霸”。施工中,只需要开挖井口位置的路面,将盾构机由井口放到地下后,就全机械化掘进。此外,沿线设置的21座综合井,还能实现出线、投料、通风、逃生等一系列功能,“以后城市中需要埋线、维修,可以直接从井口进出,不用再开挖路面。”

为缩短工期,该工程由三台盾构机同时掘进,预计春节前就能完工。

预制装配式建设

日月大道综合管廊全长约7.3公里,其中标准段1.7公里采用工业化预制拼装方式:先将钢筋按设计要求加工成型,装入模具中,再倒入搅拌好的混凝土,干燥后,一个2米长4米高的管节就成型了,经过蒸汽养护后,就可以运送到施工现场安装。

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