向莆铁路隧道施工作业要点手册一、超前地质预报....................................................................................11、预报内容.......................................................................................12、预报方法.......................................................................................13、预报分级.......................................................................................24、预报流程.......................................................................................35、预报要点.......................................................................................4二、超前支护............................................................................................41、超前小导管注浆............................................................................42、大管棚............................................................................................6三、隧道开挖方法....................................................................................81、全断面法........................................................................................82、台阶法............................................................................................93、环形开挖预留核心土法..............................................................114、中隔壁法（CD法）...................................................................135、三台阶七步开挖法......................................................................156、双侧壁导坑法..............................................................................17四、初期支护..........................................................................................191、喷射混凝土..................................................................................192、锚杆..............................................................................................213、钢架..............................................................................................234、钢筋网..........................................................................................24五、防排水..............................................................................................251、洞口及地表防排水......................................................................252、洞内排水.....................................................................................253、结构防排水..................................................................................26六、仰拱及二次衬砌..............................................................................281、仰拱..............................................................................................282、二次衬砌......................................................................................29七、监控量测..........................................................................................31-1-第1页共35页编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第1页共35页一、超前地质预报1、预报内容（1）地层岩性，特别是对软弱夹层、破碎地层、煤层及特殊土的预测预报。（2）地质构造，特别是对断层、节理密集带、褶皱轴等影响体完整性的构造发育情况的预测预报。（3）不良地质，特别是溶洞、暗河、人为坑洞、放射性、有气体及高地应力等发育情况的预测预报。（4）地下水，特别是对岩溶管道水、富水断层、富水褶皱轴富水地层等的预测预报。2、预报...
