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电缆隧道建成后,周边新建工程将会对既有电缆隧道产生一定的影响。以宁波澄浪电缆隧道为例,分析了顶管电缆隧道的破坏模式,并结合实际工程和国内外相关规范,提出黏土地层中顶管电缆隧道的位移及附加荷载控制值;通过使用有限元软件Plaxis建立多个有限元模型,得到不同相对位置处的新建并行隧道对既有电缆隧道的影响规律,并以此为依据提出了电缆隧道的保护区范围。
After the construction of the cable tunnel, the surrounding new construction will have an impact on the existing cable tunnel. Taking Ningbo Chenglang Cable Tunnel as an example, this paper analyzes the failure mode of the top-tube cable tunnel, and puts forward the displacement and additional load control value of the top-tube cable tunnel in the clay strata combined with the actual project and relevant norms at home and abroad. By using the finite element software Plaxis established a number of finite element models and obtained the influence laws of the newly-built parallel tunnels on the existing cable tunnels at different relative positions. Based on this, the range of protection zones for cable tunnels was proposed.