地铁区间隧道“桩洞法”施工掌子面变形控制技术研究

发布时间：2018-04-01 07:08

  本文选题：桩洞法　切入点：掌子面　出处：《应用基础与工程科学学报》2017年05期

【摘要】：依托济南市轨道交通R1线玉符河站-王府庄站区间隧道浅覆土长距离穿越城市主干道(刘长山路)工程,提出了一种无碍交通、节能环保、产业化水平高、环境污染小的绿色快速装配式区间隧道施工新方法——桩洞法,并详细研究了采用围岩自稳放坡+机械护盾支撑的掌子面变形控制方案.研究结果表明:不同的放坡角度工况下,掌子面安全性能指数不同;随着放坡角度从40°增至45°、50°、60°,最危险滑动面安全系数从1.649逐渐减至1.528、1.408、1.221;随着护盾前插长度的增加,坡体安全系数、坡顶沉降和坡面水平位移变化不敏感.当放坡角度为60°+护盾前插深度为1.0m时,掌子面变形安全系数为1.19,确保了掌子面开挖的安全可控;研究成果可为类似条件下掌子面稳定控制提供依据.
[Abstract]:Relying on the tunnel between Yufuhe station and Wangfuzhuang station of Jinan rail transit line R1, which passes through the main urban road (Liuchang Mountain Road) in a long distance with shallow soil, the paper puts forward a kind of project, which is unobstructed traffic, energy saving and environmental protection, and high level of industrialization. A new method of construction of green fast assembly interval tunnel with little environmental pollution, pile and hole method, is studied in detail. The control scheme of face deformation is studied in detail, which is supported by mechanical shield braced by surrounding rock self-stabilizing caving slope. The research results show that under different slope angle conditions, The safety performance index of palm surface is different; with the slope angle increasing from 40 掳to 45 掳/ 50 掳/ 60 掳, the safety factor of the most dangerous sliding surface is gradually reduced from 1.649 to 1.528 / 1.408 / 1.221; with the increase of shield forward insertion length, the slope safety factor increases, The slope top settlement and horizontal displacement are insensitive. When the slope angle is 60 掳shield forward insertion depth is 1.0 m, the face deformation safety factor is 1.19, which ensures the safety and controllability of the face excavation. The research results can provide the basis for the stability control of palm surface under similar conditions.
【作者单位】： 济南轨道交通集团有限公司;
【基金】：济南市博士后创新项目 济南市优秀创新团队(济政字[2016]40号) 山东省自然科学基金项目(ZR2016EEQ25);山东省自然科学基金项目(ZR2017MEE065) 山东省住建厅科技项目(2017-K2-011) 住房城乡建设部科学技术项目(2016-S3-008,2016-K4-053) 山东省住房城乡建设厅科学技术项目(2017-K2-012,2017-K4-009,FW-20161001:A7)
【分类号】：U231.3;U455.4
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本文编号：1694477