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地铁隧道穿越南水北调干渠施工影响分析
收稿日期: 2013-03-08
修回日期: 2013-05-13
网络出版日期: 2013-07-17
Analysis on Influence of Shield Tunneling Crossing Underneath Existing Trunk Canal of SouthtoNorth Water Transfer Project
Received date: 2013-03-08
Revised date: 2013-05-13
Online published: 2013-07-17
以郑州轨道交通2号线向阳路站—南四环站区间盾构隧道下穿南水北调干渠工程为例，利用Midas/GTS有限元软件对地铁隧道下穿南水北调干渠在未通水及通水2种工况下进行对比模拟分析，通过现行沉降控制标准，得出以下结论： 1）左右线之间间距在2倍洞径以上，可有效减少左右线隧道对干渠的叠加影响； 2）在干渠未通水的情况下，隧道在渠底覆土8 m可满足沉降要求，在干渠通水之后，下穿隧道在渠底覆土厚度建议大于12 m。从地铁隧道施工方面考虑盾构施工对南水北调干渠可能产生的影响，以期为地铁隧道下穿南水北调干渠明渠设计及施工过程中线间距、覆土厚度选择、下穿时序及盾构掘进参数提供借鉴。
杨喜 , 邹琦 , 王庆 . 地铁隧道穿越南水北调干渠施工影响分析[J]. 隧道建设, 2013 , 33(7) : 562 -566 . DOI: 10.3973/j.issn.1672-741X.2013.07.006
The shieldbored tunnel from Xiangyanglu Station to Nansihuan Station of line 2 of Zhengzhou Metro crosses underneath the trunk canal of Southtonorth Water Transfer Project. The shield tunneling crossing underneath the trunk canal is simulated by means of Midas/GTS finite element program. Conclusions drawn are as follows: 1) If the spacing between the left Metro tunnel tube and the right Metro tunnel tube is more than 2d (d=tunnel diameter), the overlapping influence of the construction of the twin tunnel tubes on the trunk canal can be effectively reduced; 2) When there is no water in the trunk canal, the settlement requirements can be met when the overburden of the tunnel is 8 m; When there is water in the trunk canal, the overburden of the tunnel is proposed to be 12 m.
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