| 南钰,严中,陈凯.盾构下穿施工对既有城市道路沉降影响研究[J].安徽建筑大学学报,2022,30(): |
| 盾构下穿施工对既有城市道路沉降影响研究 |
| Wear under Shield Construction for Both City Road Subsidence Impact Study |
| 投稿时间：2021-06-25 修订日期：2021-09-07 |
| DOI： |
| 中文关键词: 盾构下穿 隧道埋深 开挖距离 沉降峰值 |
| 英文关键词: shield under wear tunnel buried depth the excavation distance sedimentation peak |
| 基金项目:安徽省高等学校自然科学基金重点项目 |
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| 中文摘要: |
| 针对盾构下穿对既有城市道路造成的影响，以合肥市地铁建设4#线天水路站～翠柏路站盾构区间为工程背景。运用Midas GTS NX建立数值分析模型，研究隧道埋深和开挖距离对道路沉降的影响。结果显示：先开挖左线时，沉降在开挖第五到第十环过程中发生突变；埋深在2D以内时，随着开挖的进行，沉降曲线从“单谷”转为“双谷”，但沉降峰值始终保持在左线隧道中心线附近；埋深超过2D，双线隧道的相互作用可以忽略，全线贯通时的沉降峰值出现在双线隧道中心线上方；埋深始终与影响范围成正比，与影响程度成反比；合理安排这两种因素能够有效控制道路沉降，保证施工安全进行。 |
| 英文摘要: |
| For influence of shield underpassing on existing urban roads, the shield interval from Tianshui Road Station to Cuibai Road Station of Hefei City Rail Transit Line 4# was used as the engineering background. The numerical analysis model of tunnel underpassing urban road was established by using Midas GTS NX to study the influence of tunnel burial depth and excavation distance on road settlement. The results show: When the left line is excavated first, the mutation occurs during the excavation process from the fifth to the tenth ring. When the buried depth is within 2D, the settlement curve gradually changes from "Single Valley" to "double Valley" with the progress of excavation, but the peak always appears above left tunnel’s center; When the buried depth is more than 2D, the interaction of double track tunnel can be ignored, and the peak settlement appears above the center line of double track tunnel; The buried depth is always in direct proportion to the influence range and inversely proportional to the influence degree; Reasonable arrangement of these two factors can keep the road’s settlement and ensure the engineering’s safety. |
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