摘要:
城市地下管线的开裂导致水油气等的泄露通常会对周围环境产生重要影响,由于其隐蔽性,问题发现滞后,导致预测起来相对困难。同时,突发的管线破裂渗漏会导致地质环境的改变,从而影响基础结构的力学特性,对工程安全构成直接威胁。目前,突发流量大小对地铁隧道的影响程度还没有准确定论。本文以哈尔滨地铁建设为依托,研究了精确寻找管线破裂而产生的水流源的方法,并根据现场实测数据分析地下输水管线的破裂造成水流对地表沉降、隧道拱顶沉降、净空收敛的影响。
关键词:
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地铁隧道
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监测
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渗流
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地表沉降
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管线
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CD法
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拱顶沉降
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净空收敛
Abstract:
The leakage of oil, gas and water owing to the pipe cracking will usually have an important impact on the surrounding environment, and the forecast become relatively difficult because of the pipe concealment and the prob- lems finding' hysteresis quality. At the same time, the sudden pipeline rupture leakage can lead to the change of the geological environment, which affects the mechanical properties of the infrastructure, and has a direct threat to the project safety. At present, the influence degree of the sudden leakage flow size to the subway tunnel is not accurate conclusion. This paper to Harbin metro construction, researches the method about looking for the source of seepage caused by break of the pipeline, and analyses the underground line leakage causes the influence on the ground surface settlement, tunnel vault settlement, and clearance convergence, according to the field measured data.
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