Lanzhou to identify Road collapse causes

Collapse of Zhangye road pavement.

On August 23, Zhangye road after road collapse, attracted a lot of attention.

After the accident, City Council, municipal management Department quickly organized emergency power for pumping the water seepage problems in subsidence area job management. At present, the Group of experts on accident investigation, accident road collapse for the formation of district 25m, 3.5M-9m wide, deep 3.0M-3.5M.

Collapse of Zhangye road pavement.

The main reason causing the collapse:

Zhangye road backfill underground pipeline is not dense, collapsed sections projects frequently, underground pipe density and other factors, resulting in sudden collapse of pavement.

Second, Zhangye road, rain sewage pipe leakage.

Third ground of Zhangye road rainwater channel deformation, leakage, loss of soil around the underground pipeline, causing local cavity, combined with the night of 22nd sudden heavy rains, exacerbating the subgrade soil erosion, causing Road collapse.

Road surface subsidence area and repair processes of rain sewage pipelines and communication lines, combined with the observations of the expert group, in charge of the leadership of the municipal government requirements: one is to take the time to immediately organize backfill operation, ensure the safety of underground pipelines. Second, fractured sewage pipelines, strong weak or damaged, we assume the implementation of repairs. Third, scientific construction, ensuring quality, full restoration of pavements. Four are on Zhangye road sector-wide use of geophysical methods for exploration, identify holes and engineering. To respond actively to social concerns to the social progress of the rescue work in a timely manner and media.

(Editors: Zhong Qinghui UN660)
2016-08-24 12:55:21
Surging

兰州查清路面塌陷原因

　　张掖路塌陷的路面。

　　8月23日，张掖路路面塌陷后，引起各方高度关注。

　　事故发生后，市建设局、市政管理处等迅速组织抢险力量对塌陷区域的渗水问题进行了抽水作业处置。目前，经过专家组对事故现场认真调查，事故形成的道路塌陷区长25m，宽3.5m-9m，深3.0m-3.5m。

　　张掖路塌陷的路面。

　　造成塌陷的主要原因：

　　一是因张掖路地下管线回填不密实，塌陷区段工程建设频繁，地下管道密集等多种因素，造成路面突发塌陷。

　　二是张掖路步行街地下雨污水管道存在渗漏。

　　三是张掖路步行街地面雨水明渠变形，有渗漏，地下管道周围土体流失，造成局部空洞，加之22日夜突降大雨，加剧对路基土体冲刷，引起路面塌陷。

　　针对路面塌陷区及雨污水管线和通讯线路抢修进程，结合专家组意见，市政府分管领导要求：一是抓紧时间，立即组织开展回填作业，确保地下管线安全。二是对已断裂的排污管线、强电弱电及破损明渠实施抢修。三是科学施工，确保质量，全面恢复路面。四是对张掖路全区段采用物探方法进行探查，查明存在的空洞体，并进行工程处理。 要积极回应社会关切，及时把抢险工作的阶段性进展情况向社会和媒体公布。

(责任编辑：钟庆辉 UN660)
2016-08-24 12:55:21
澎湃