|
| 叠落盾构隧道施工扰动及控制措施研究 |
| Research on the Disturbance and Control Measures of Overlapping Shield Tunnel Construction |
| 投稿时间：2025-04-11 修订日期：2025-06-17 |
| DOI： |
| 中文关键词: 叠落盾构隧道 施工扰动 先建隧道 注浆加固 |
| 英文关键词: overlapping shield tunnel construction disturbance pre-built tunnels grouting reinforcement |
| 基金项目:地铁动荷载下非饱和膨胀土动力特性及振动传播机理研究 |
|
| 摘要点击次数: 92 |
| 全文下载次数: 0 |
| 中文摘要: |
| 针对叠落盾构区间后建隧道施工对邻近先建隧道影响问题,以合肥地铁8号线灵~耀区间叠落盾构隧道工程为背景,通过数值模拟,研究了后建隧道施工对地层和先建隧道结构的影响。结果表明,后建隧道施工会造成地表进一步沉降和引起先建隧道结构变形；竖向和斜向叠落隧道掘进引起地表最大沉降点分别位于拱顶上方和两隧道轴线之间位置；先建隧道受影响区域主要集中在后建隧道掌子面前方4倍洞径到后方3倍洞径范围；叠落隧道间距越小,则后建隧道对于先建隧道的影响越大；上下隧道联合注浆加固控制措施可有效减弱对先建隧道的影响。 |
| 英文摘要: |
| Considering the impact of sequentially constructed tunnels on adjacent pre-existing tunnels, this study investigates the effects of post-construction tunnel excavation on the ground and the structure of the pre-existing tunnel, using the overlapping shield tunnel project of the Ling-Yao section of Hefei Metro Line 8 as a case study. Numerical simulations were employed to analyze these effects. The results indicate that the construction of the subsequent tunnel leads to further surface settlement and structural deformation of the pre-existing tunnel. The maximum surface settlement points caused by vertical and inclined overlapping tunnel excavation are located above the arch and between the axes of the two tunnels, respectively. The area of significant impact on the pre-existing tunnel is primarily concentrated within a range of 4 times the tunnel diameter ahead of the face of the subsequently constructed tunnel to 3 times the diameter behind it. The smaller the distance between the overlapping tunnels, the greater the impact of the subsequent tunnel on the pre-existing one. Furthermore, the implementation of combined grouting reinforcement measures for the upper and lower tunnels can effectively mitigate the impact on the pre-existing tunnel. |
|
View Fulltext
查看/发表评论 下载PDF阅读器 |
| 关闭 |
