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地铁2号线昼夜施工全速掘进

2017-08-25 08:17:06   中国青年网

攻坚克难打造精品工程

2号线南北贯穿哈尔滨,部分站点周边建筑密集,地层富水富沙,施工难度非常大。哈尔滨地铁2号线建设者统筹协调设计、施工、监理等诸多环节,采取站点明、暗挖与区间盾构有机结合的办法,见招拆招破解施工难题。

近日,记者在2号线一期人民广场站了解到,该站点是在建车站中施工较为复杂的换乘车站,施工人员正在紧张地进行焊接、拼装等作业。“该场站为地下三层车站,设计结构较为复杂,在车站深基坑施工过程中,工程难点较多。”人民广场站项目部经理崔制峰告诉记者。

“由于施工区域地处中心城区又是交通要道,为减小影响,我们采取了难度较大的倒边盖挖施工方式进行,相较于明挖法施工,可以将对周边的影响降到最低。”崔制峰告诉记者,该站靠近松花江,施工区域最近的地方距离江面只有不到100米的距离,富水、富沙且粘性高的不利地质是施工面临的又一挑战。为保证安全质量,施工方攻坚克难,成功规避了深基坑开挖涌水风险、结构坍塌风险,保证了周边居民和建筑的安全,攻克了地铁深基坑施工的一大难题。

同样的难度,也出现在地铁2号线哈尔滨站、省政府站等地,为了最大程度减少对交通的影响,这些站分别采取倒边施工和暗挖的方法。“2号线南北贯穿哈尔滨,沿途都是交通干道,为此采取局部盖挖方式,或倒边施工、分段施工,以保证市民正常通行,减少施工给城市生活带来的不便。”负责地铁2号线建设的中电科哈尔滨轨道交通有限公司工程部部长王海军告诉记者。

一个个被攻克的难关离不开超前谋划筹备,早在2014年哈市就开始提前谋划,针对每个场站地上、地下复杂的情况,每一个地铁站和区间的方案设计都煞费苦心,提前制定施工方案,实现无缝衔接,同步多点位平行推进,确保工程顺利实施。

优质服务追求更高标准

随着地铁2号线建设的不断推进,哈市对地铁服务有了更高的要求,目前,哈市确定将地铁2号线打造成为首条无人驾驶线路。

“地铁无人驾驶技术在国内属于新兴事物,目前国内只有广州、上海地铁线路运用到无人驾驶技术,让列车具备全自动正线运行、自动进出站、自动开关门等功能,列车空调、照明系统也可实现远程控制。”哈尔滨地铁集团2号线项目负责人陈培军告诉记者,无人驾驶需要预留出更多时间进行后期调试,这就意味着地铁2号线各站点的工期都要提前完成。然而,哈尔滨每年有效施工期只有8个月左右,这无疑对工期进度又有了新的要求。

地铁2号线采用BOT运作模式,哈尔滨地铁集团作为政府监管部门,积极帮助项目公司协调相关问题,确保项目顺利进行。“建设之初要不是地铁集团及时帮忙协调相关部门进行管线迁移,工程进度也不会这么快。”地铁2号线尚志大街站项目部郑经理告诉记者,该站位于城市中心,涉及给水、排水、燃气、电力通信网络等主管网,管线迁移难度很大。

记者采访中了解到,哈尔滨地铁集团始终把“规划好、建设好、管理好”地铁,作为各项工作的根本目的和最终目标。在规划设计上,广泛征求社会各界的意见,科学确定线路走向、站点设置。同时,坚持高标准、严要求,从工地围挡、现场硬化铺装、残土车水冲洗运输等细节入手,狠抓文明施工管理,努力把对城市环境的影响降到最低。

图为地铁2号线衡山路站盾构机向省政府站掘进。 本报记者刘心杨摄

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