Placing concrete plug on site to substitute the weak plane is adopted after comparing several treatment schemes.

经多种处理方案比较，选用混凝土洞塞来置换一定范围的地质软弱面。

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This paper presents the reasons for taking this measures, layout of concrete plug, excavation, backfilling and inspection of construction quality.

详细论述了采用该技术的原因、洞塞的布置、开挖、回填和施工质量检测等。

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Abstract: : Based on the practical cases of construction, this paper discusses the key points of concrete plug pipeline construction technology of municipal sewage project.

摘要：本文根据工程案例，对市政污水工程砼承插管道施工技术要点作出了论述。

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Dena Libner, a spokeswoman for the Central Park Conservancy, said the workers found the munitions after removing a concrete plug from the mouth of the cannon.

CNN: STORY HIGHLIGHTS