运营地铁盾构隧道洞门渗漏水病害整治

城市地铁隧道洞门渗漏水病害较多。基于此,文章针对某城市运营地铁盾构隧道洞门出现的渗漏水病害进行了调研,对洞门渗漏水病害的原因进行了分析。结果表明,外部土体扰动、二次注浆不密实形成含水空腔以及洞门处刚性和柔性接触是产生渗漏水病害的主因。通过两起典型的运营地铁隧道洞门渗漏水治理案例阐述了洞门渗漏水治理的技术要点和难点,提出了洞门渗漏水病害治理原则和建议。

Remediation of Water Leakage at Portal of Operating Shield Tunnel

It′s very often to encounter water leakage at the portal of urban metro tunnel.An investigation is con⁃ducted aiming at the water leakage diseases at the portal of certain urban operating shield tunnel,and the causes are analyzed.The results show that the main causes of water leakage include disturbance of external soil mass,watercontaining cavity due to non-impacted secondary grouting,and rigid and flexible contact at portal.The key techni⁃cal points and difficulties are described based on two typical cases of water leakage remediation at portal of operating metro tunnel,and the principles and recommendations for treatment of water leakage at tunnel portal are proposed.