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湖南一城市防洪堤6年5次垮塌 有的石料手捏成渣

2016-09-12 15:12:09   新华网

首先是石料质量。防洪堤边上原来有一座数十米高的石山,建造大堤主要是就地取材,石山如今被夷为平地。一位参与开山取石的当地人向记者举报称,其中大约20%的石料类似于“风化石”,每吨比市场价格要低20元。

举报人在现场向记者指认,类似“风化石”的石料在大堤外立面和垮塌处横断面随处可以看到。记者随机统计发现,在一个面积约20平方米的大堤外立面,就有12块这样的石头。这些石料大部分用木棍一戳就碎,有的直接用手可以抠下来一大块。用手或搓或捏,有的石块便成为碎渣。

此后,记者又与滨河路二段建设工程指挥部多位负责人来到现场。他们坦言,这种石头是“炭质页岩”,硬度不够,存在质量隐患,容易影响石头间粘连,导致整体结构不稳,确实不应该进入大堤建造环节。

其次是施工过程。工程指挥部负责人称,按照设计要求,大堤要采取“满浆满缝”的砌墙方式,即砌好一层石头,铺一层砂浆。在垮塌断口处,不少石头间完全看不到砂浆。多名负责人在现场表示,并非所有堤段都做到了“满浆满缝”,存在偷工减料行为。

参与防洪堤施工的一位包工头透露,砂浆中水泥沙子的比例应该达到1比3,但实际只有1比5。此外,防洪堤靠近外面的部分是“满浆满缝”,而其他部位则是采用“干浆”砌法。

2011年,道县县委办的一份材料中也指出,造成垮塌的原因,一是施工质量,从现场情况看,个别地方砂浆混凝土施工未达到质量要求;二是填土过快,未完全达到碾压要求,土体较松软,空隙率较大。

在现场,当地有关部门负责人表示,除了工程质量问题,大堤附近地下排污管建设多次爆破、排水不畅等因素,也是大堤垮塌的原因。

 “不下雨时就谁都不管”,未提供质检和监理报告

据了解,这段防洪堤是道县滨河路二段房地产开发项目的配套工程,整个项目占地约180亩,其中商业、住宅开发用地为110亩,开发商为永州兴龙置业有限公司,防洪堤计划投资约800万元。

根据道县政府与兴龙置业公司的协议,开发商除了房产开发,还需承担滨河路二段道路、风光带、防洪堤及护栏工程等基础设施建设。道县政府根据工程进度,将土地成交价款分期返还给开发商。

记者拿到工程指挥部一份2008年的会议纪要,其中写明,防洪堤建设单位为道县人民政府,责任单位为道县水利局,承建单位为永州兴龙置业有限公司。同年,兴龙置业公司将防洪堤工程转交由祁阳县水利水电建设工程公司承建。

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