土压平衡盾构全断面硬岩施工技术.pdf
文档页数：4文档大小：1.47MB文档格式：pdf2014年5月上 工技术 第43卷第9期 CONSTRUCTION TECHNOLOGY127 o:10.7672/sgjs2014090127 土压平衡盾构全断面硬岩施工技术 闫建诚 (中国中铁一局集团有限公司,陕西西安710054 摘要]盾构隧道开挖断面范围为硬岩地层时存在盾构掘进速度慢、盾构姿态控制难度大、设备及刀具磨损严重 且刀具更换频繁等问题。结合实际工程,介绍了盾构选型、掘进模式选择、盾构掘进参数和盾构姿态控制、刀具管 理等关键措施,确保盾构安全顺利推进 [关键词]隧道工程盾构全断面砂层;渣土改良;沉降 中图分类号]U455.3 [文献标识码]A [文章编号]1002-8498(2014)09-0127-04 Construction Technology of Earth Pressure Balance Shield in theWhole Section Hard Rock LayerYan JianchengChina Railway First Group Co .Ltd .Xi'an ,Shaanxi 710054 ,China ) Abstract :There are some difficulties when tunnel section locating in weathered hard rock stratum such asslow tunneling speed ,difficulties in controlling shield posture ,equipment and serious tool wearing andfrequent tools replacing .Based on actual project ,key measures are introduced to ensure the safety andsuccessful shield construction including choosing the reasonable selection shield and driving modestrictly controlling of shield tunneling parameters and shield posture ,and strengthening shield toolsmanagementKey words :tunnels ;shields ;whole section sand layer ;soil amelioration ;settlement1工程概况 2.1选型原则 某盾构区间岩石地质条件复杂,既有极为松软 隧道穿越范围围岩强度、裂隙发育程度和地下 的淤泥质土、砂层,又有坚硬的微风化混合岩、辉绿 水含量等地质...
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