据介绍,坍塌其实是排污涵渠沉降,该渠为浆砌片石结构,排污渠底板下方7米左右,就是深圳地铁11号线后松区间暗挖隧道,至于发生沉降的原因,现场工作人员表示,初步分析是排污渠基底长期受茅洲河污水浸泡,上部地质疏松,但也不排除地铁施工诱发沉降的因素。
事故发生后,施工方立即组织人员进行抢修,对周边的建筑物进行了实时监测,并采用混凝土对沉降地点进行临时加固等措施,发生沉降的具体原因还在进一步的调查当中。

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