当盾构施工引起的地层沉降过大时，可能导致地表建筑物倾斜、地下管线断裂、地面、桥梁、道路等发生破坏，对周围环境产生不利影响。
The undue stratum settlement is likely to cause the bad effect to the around environment such as incline of building, rupture of underground pipelines, destroy of ground and Bridges and roads.
本文介绍了市政道路管线中非开挖施工技术的含义及非开挖技术的现状，并分析了该技术在城市管道铺设中的应用。
This article introduced the meaning and the present situation of non-excavation construction technique and analyzed its application in the city pipelining.
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