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Old 07-26-2011, 07:02 PM   #1
sunsou7h9
 
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Default 地铁屏蔽门玻璃6天内“两爆” 乘客怀疑玻璃质量差

  昨天一早,不少乘客自轨交10号线老西门站上车,斯可络空压机突然发现驶往虹桥火车站方向的一块屏蔽门玻璃已经碎裂。轨交运营方证实,爆裂发生在当日运营开始前。无独有 偶,就在7月14日,轨交11号线桃浦新村站也曾发生屏蔽门玻璃爆裂的意外输送皮带
  6天内,上海地铁发生两起屏蔽门玻璃爆裂事件,令不少乘客忧心玻璃爆裂伤人伤车,碎玻璃掉进轨道内会否 影响行车安全?MaxMara 意大利代购接下来别的轨交线路还会发生类似问题吗?抛光加工厂不少网友表示:“屏蔽门本来是防止跳轨自杀的,上海至东北专线但现在却威胁了上班族的安全。”
  目击者说:玻璃爆裂前已经开裂了
  老西门站碎裂的这块玻璃,位于第14号和第15号屏蔽门之间,属站台屏蔽玻璃(属于屏蔽门整体工程的一 部分,上海会所装潢是屏蔽门之间的连接),11号线桃浦新村站爆裂的也属于站台屏蔽玻璃。
  对于玻璃碎裂的具体情形,记者在站内询问了多名工作人员,但大多数人表示不知道输送皮带。经过两个多小时的询问,记者终于找到知情人,对方回忆说,在当天凌晨4点多,他已经看到这块玻璃上有明显 的裂痕,“一个多小时后,玻璃‘哗啦’一下全部碎了。”玻璃碎裂后,碎玻璃都下坠在附近,并未四下飞溅。知 情人估计,碎裂时间大致是当天清晨5点20分左右,上海至东北专线这与轨交方面事后从监控录像内看到的情况及事发时间基本吻合。水帘式喷漆柜此时,当日的10号线运营并未开始。
  乘客质疑:才装一年多怎么就碎了
  不少乘客得知事发经过后,感叹幸运:“若发生在上班早高峰,可能会有乘客被划伤。”
  很多乘客表示不解:“前几天11号线屏蔽门玻璃不是刚刚碎过一次吗,百叶窗帘怎么现在10号线屏蔽门玻璃又碎了,这些屏蔽门玻璃都刚安装一年多。”乘客肖女士说:“两次爆裂事件才隔了 几天,本来用来保障乘客安全的屏蔽门,玻璃质量却这么经不住考验,叫乘客怎么能放心乘坐轨交。 ”
  对最近的地铁屏蔽门玻璃发生这样的意外,不少热心市民对于玻璃的质量以及材质提出了质疑。 据介绍上海会所装潢,现今全上海安装屏蔽门的地铁站大概有200个左右,平均每个站台大概有194块左右的玻璃。不过,地铁方 面表示,屏蔽门玻璃爆裂仍属于小概率事件。
  厂家勘查:碎玻璃没棱角,不会伤人
  事发后,上海地铁方面立即请技术人员到达现场勘查。斯可络空压机现场勘查的地铁技术人员告诉记者,地铁站所用的玻璃都是一种“铯钾玻璃”,这种强化玻璃的成本要比普通的钢 化玻璃高出50%到100%,抗冲击度优于普通钢化玻璃,其防火能力也远大于普通钢化玻璃。非标准金属装饰栏杆型材加工地铁屏蔽门采用的钢化玻璃即便破碎了,五金冲压螺丝螺帽不会像普通玻璃一样出现有棱角的玻璃碎片,而是会粉碎成无数指甲大小、没有棱角的小碎粒,不会 伤人。
  该技术人员表示,尽管这种玻璃安全性能比较好,抛光加工厂但仍存在一定的自爆率,昨晨10号线屏蔽门玻璃仍属自爆,是正常现象。
  地铁回应:对全线玻璃排查隐患
  对于爆裂的玻璃,地铁方面声称,晚上地铁停止运营之后,立即维修更换,在今天运营开始之前 维修完成。
  地铁相关人员表示,力争将地铁的一切做到最好,百叶窗帘尽量避免类似事故的再次发生。输送皮带针对近期在地铁发生的两起屏蔽门玻璃自爆情况,包缝机自动剪线上海地铁要求屏蔽门项目总承包商和相关生产商组织力量调查原因,并安排技术人员对全线玻璃进行一次检查,地 铁运营方也将积极配合,防止类似情况再次发生。
  上海地铁强调说,德斯兰空压机乘客候车时请按照警示站在黄线外,不要挨着玻璃门,消防泵以防事故发生伤及个人。MaxMara 意大利代购不过在采访的过程中,记者发现依然有不少乘客喜欢斜靠在屏蔽门候车。
  [三问屏蔽门玻璃爆裂原因]
  疑问1:地铁站台温差大导致爆裂?
  对于此次屏蔽门玻璃爆裂的原因,前往事故现场勘查的技术人员称,上海装饰装潢首先考虑的是温度因素。轨道通道的温度通常都比较高,而站台上的温度相对要低。因此,屏蔽门内外就形成了十 几摄氏度的温差。由于热胀冷缩,形成了屏蔽门玻璃容易爆裂的一个基本条件。
  温差会否导致屏蔽门爆裂?同济大学建筑材料研究所所长、德斯兰空压机博士生导师张雄教授认为,非标准金属装饰栏杆型材加工上海轨交站现有的温差不足以导致钢化玻璃爆裂,屏蔽门所采用的钢化玻璃为铯钾防火玻璃,比起普 通钢化玻璃,斯可络空压机铯钾玻璃有一定的隔热性,能够在短时间内抵挡一定的高温炙烤。
  疑问2:列车行驶产生的风压导致爆裂?
  地铁屏蔽门紧邻轨道,列车进、出站所产生的风速和风压是否会导致屏蔽门爆裂呢?对此,现场勘查的专业技 术人员称,上海粘合剂屏蔽门玻璃爆裂也与地铁内“活塞风”有关。“当有地铁经过时,站台处会形成‘活塞风’,正是相当10级风的 ‘活塞风’使屏蔽门内外形成了巨大的压力差,这也会导致屏蔽门更加容易爆裂。”技术人员还特别强调说,假如 玻璃上有裂痕,这样的“压力差”特别容易引起爆裂。
  不过,对于这个问题,张雄教授表示,上海奉贤电焊机列车进出站肯定会对屏蔽门上的钢化玻璃产生一定的压力,但是地铁方面在建设时应该对此就已经有足够考虑的。 “在安装屏蔽门前,地铁方面应该已经对列车所产生的风速、风压进行过测算,然后根据压力大小,上海奉贤电焊机加上一定浮动的安全系数,来选择需要的钢化玻璃厚度。”
  还有一种观点认为,因为每天几分钟一班的地铁一经过,消防泵玻璃就会有明显的震动,自然也会加速玻璃的老化。
  疑问3:屏蔽门玻璃本身有质量问题?
  对于乘客怀疑的质量问题,地铁方面强调,所有屏蔽门供应商都是按照国家规定,经过严格的招投标过程产生 的,上海会所装潢已经要求屏蔽门项目总承包商和相关生产商组织力量调查原因。但对具体厂商名单,地铁方面却表示:“还不清楚 ,需要进一步了解”。
  地铁方面解释,目前上海地铁内所安装的屏蔽门是由多家不同生产厂商提供的,输送皮带发生屏蔽门玻璃爆裂事故的10号线和11号线,分别由两家屏蔽门生产商提供,“他们负责生产屏 蔽门,上海至东北专线但是屏蔽门上的玻璃,是再转包出去,由其他玻璃生产厂家生产的。”但在老西门站现场,曾有人称,两次发生爆 裂事故的屏蔽门玻璃供货商应是同一家企业。
  记者昨天前往轨交10号线老西门站采访时,五金冲压螺丝螺帽正值有身穿带英文标志“westinghouse(西屋)”制服的技术人员参与勘查,对方表示自己仅负责勘 查,是否有做过安全测试,不太清楚。但地铁方面的技术人员表示,消防泵当初采购这种铯钾玻璃时都进行了一系列的测试,上海装饰装潢例如用载重量50吨的卡车对其进行反复碾压、高温测试以及压强测试等,测试结果表明这种玻璃的安全性能还是 挺高的。
  记者随后致电西屋月台屏蔽门(广州)有限公司,接听电话的张先生表示,消防泵上海轨交10号线的屏蔽门确实是该公司生产的,不过具体情况要问上海的相关负责人,但截至发稿仍未打通该负 责人电话。
  ■新闻链接
  多城地铁都曾现屏蔽门玻璃莫名爆裂水帘式喷漆柜
  7月14日11号线桃浦新村站站台屏蔽门爆裂,MaxMara 意大利代购昨日10号线老西门站屏蔽门玻璃再次爆裂。德斯兰空压机有网络媒体曝 “上海近年有少数站点在不同的时间曾发生过玻璃爆裂,总数不超过十块。 ”对此,上海地铁方面昨对本报记者表示,上海目前只发生两起屏蔽门玻璃自爆事件。至于屏蔽门爆裂的原因有很 多,或许是硬物撞击所致,或许是温差所致,也不排除是玻璃自身老化。
  记者查询以往新闻发现,广州、香港、重庆、上海粘合剂北京等地的地铁屏蔽门玻璃也曾数度发生爆裂,抛光加工厂但并未造成人员伤亡,制冷设备回收,玻璃碎裂的原因大都不明,运营方推测为自爆,个别为硬物撞击。其中广州地铁玻璃屏蔽门爆裂事件在8年发生 了将近10起。
  ■相关新闻
  长途客运总站候车厅二楼扶栏玻璃摇摇欲坠
  昨日,有网友微博曝料称,水帘式喷漆柜上海长途客运总站候车大厅二楼一块玻璃破碎,看上去摇摇欲坠。上海奉贤电焊机网友担心下玻璃雨砸到一楼候车乘客。
  记者随后来到了上海长途客运总站候车大厅,发现该玻璃安装于自动扶梯二楼入口旁的候车大厅一处扶栏上, 面积大约有1个多平方米。这块玻璃是多层玻璃,破碎的是中间的夹心层。一旁的清洁工人告诉记者,玻璃并非今 天碎的,已经有一段时间了。长途客运总站相关负责人表示,上海粘合剂站方已经向厂家订做新的玻璃,最多一周后就可以更换完毕。
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