土压平衡盾构全断面硬岩施工技术

Construction Technology of Earth Pressure Balance Shield in the Whole Section Hard Rock Layer

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。

There are some difficulties when tunnel section locating in weathered hard rock stratum such as slow tunneling speed, difficulties in controlling shield posture, equipment and serious tool wearing and frequent tools replacing. Based on actual project, key measures are introduced to ensure the safety and successful shield construction including choosing the reasonable selection of shield and driving mode, strictly controlling of shield tunneling parameters and shield posture, and strengthening shield tools management.