大独山隧道穿越断层专项施工方案(修)

中铁二十局集团有限公司大独山隧道穿越断层专项施工方案1目录1、编制依据··············································································12、编制原则··············································································12.1高效、适用原则·································································12.2安全原则··········································································12.3符合本单位技术水平的原则··················································13、适用范围··············································································14、工程概况··············································································64.1隧道概况··········································································64.2断层施工存在的风险··························································65、穿越断层安全施工方案····························································65.1严格施工流程····································································65.2加强超前地质预报·····························································75.3加强监控量测····································································76、施工方案··············································································86.1方案实施·········································································86.2做好围岩量测，明确掌握围岩动态，指导施工。·····················217、技术措施············································································217.1超前预报·······································································217.2围岩固结、堵水······························································217.3初期支护·······································································21中铁二十局集团有限公司大独山隧道穿越断层专项施工方案27.4仰拱·············································································217.5衬砌施工······································································218、施工安全管理制度································································218.1坚持专人负责的原则·························································218.2集思广益的原则·······························································228.3坚持施工程序的原则·························································228.4执行设计的原则·······························································228.5预防为主的原则·······························································22中铁二十局集团有限公司大独山隧道穿越断层专项施工方案1大独山隧道穿越断层专项施工方案1、编制依据1.1《沪昆客专长昆贵州段指导性施工组织设计》；1.2《高速铁路隧道工程施工技术指南》、《高速铁路隧道工程施工质量验收标准》；1.3《铁路隧道工程施工安全技术规程》（TB10304-2009，J947-2009）；1.4《铁路隧道超前地质预报技术指南》（铁建设【2008】105号）；1.5《大独山隧道设计图第二册共四册》；2、编制原则2.1高效、适用原则本方案能高效运行，适合本工程，能正确指导施工；2.2安全原则本方案的操作实施要安全，并能指导安全施工；2.3符合本单位技术水平的原则本方案投入的设备、现场组织协调均符合本单位现有水平，能确保方案顺利实施。3、适用范围根据设计图纸：洞身依次穿越大兴寨断层、龙门地断层、垮岩断层、大湾断层、营盘坡断层、杨家冲断层、永宁镇断层等7个断层，8个推测破碎带，4个可溶岩与非可溶岩接触带。如下表示：中铁二十局集团有限公司大独山隧道穿越断层专项施工方案2起讫里程长度m风险等级附注D1K853+170～D1K853+24070中可溶岩与非可溶岩接触带D1K853+365～D1K853+41550高F1推测破碎带D1K853+700～D1K853+800100高F2推测破碎带D1K854+510～D1K854+610100高F3推测破碎带D1K855+025～D1K855+125100高F4推测破碎带D1K855+200～D1K855+320120高大兴寨断层D1K855+580～D1K855+680100高F5推测破碎带D1K856+110～D1K856+16050高龙门地断层D1K856+210～D1K856+335125中F6推测破碎带D1K856+615～D1K856+750135高垮岩断层D1K857+250～D1K857+30050高大湾冲断层D1K857+695～D1K857+77075高营盘坡断层D1K858+070～D1K858+11040中F10推测破碎带D1K858+290～D1K858+33060中可溶岩与非可溶岩接触带D1K859+350～D1K859+40050高杨家冲断层D1K859+800～D1K859+950150高永宁镇断层D1K860+235～D1K860+28550中可溶岩与非可溶岩接触带D1K860+285～D1K860+510225中F12推测破碎带D1K860+770～D1K860+82050高可溶岩与非可溶岩接触带大独山隧道共有7个断层、8个推测破碎带与4个可溶岩与非可溶岩接触带，其施工的工艺参数严格按照施工图纸、规范施工。其支护参数如下：可溶岩与非可溶岩接触带：D1K853+170～D1K853+240段长度为70m。采用Ⅳc型复合式衬砌，台阶法临时仰拱，拱部设置Φ42×3.5mm的小导管，每环40根，每根长度为4.0m，纵向每2.4m一环，全环Ⅰ18型钢拱架，间距0.8m。可溶岩与非可溶岩接触带：D1K858+290～D1K858+330段长度为60m。采用Ⅳb型复合式衬砌，台阶法临时横撑，拱部设置Φ42×3.5mm的小导管，中铁二十局集团有限公司大独山隧道穿越断层专项施工方案3每环40根，每根长度为4.5m，纵向每3.0m一环，全环Ⅰ18型钢拱架，间距1.0m。根据超前预报实施帷幕注浆。可溶岩与非可溶岩接触带：D1K860+235～D1K860+285段长度为50m。采用Ⅳc型复合式衬砌，台阶法临时仰拱，拱部设置Φ42×3.5mm的小导管，每环40根，每根长度为4.0m，纵向每2.4m一环，全环Ⅰ18型钢拱架，间距0.8m。根据超前预报实施超前周边注浆。可溶岩与非可溶岩接触带：D1K860+770～D1K860+820段长度为50m。采用Ⅴc型复合式衬砌，台阶法临时仰拱，拱部设置Φ42×3.5mm的小导管，每环50根，每根长度为4.0m，纵向每2.4m一环，全环Ⅰ22a型钢拱架，间距0.6m。根据超前预报实施超前周边注浆。大兴寨断层：D1K855+200～D1K855+320段长度为120m。采用Ⅴ级抗水压1.0Mpa复合式衬砌，台阶法临时仰拱，拱部设置Φ76×6mm的中管棚，每环50根，每根长度为8.0m，纵向每6m一环，全环Ⅰ20b型钢拱架，间距0.6m。根据超前预报实施超前周边注浆。龙门地断层：D1K856+110～D1K856+160段长度为50m。采用Ⅴ级抗水压0.5Mpa复合式衬砌，台阶法临时仰拱，拱部设置Φ76×6mm的中管棚，每环50根，每根长度为8.0m，纵向每6m一环，全环Ⅰ20b型钢拱架，间距0.6m。根据超前预报实施超前周边注浆。垮岩断层：D1K856+615～D1K856+750段长度为135m。采用Ⅴ级抗水压1.0Mpa复合式衬砌，台阶法临时仰拱，拱部设置Φ76×6mm的中管棚，每环50根，每根长度为8.0m，纵向每6m一环，全环Ⅰ20b型钢拱架，间距0.6m。根据超前预报实施帷幕注浆。中铁二十局集团有限公司大独山隧道穿越断层专项施工方案4大湾冲断层：D1K857+250～D1K857+300段长度为50m。采用Ⅴ级抗水压0.5Mpa复合式衬砌，台阶法临时仰拱，拱部设置Φ76×6mm的中管棚，每环50根，每根长度为8.0m，纵向每6m一环，全环Ⅰ20b型钢拱架，间距0.6m。根据超前预报实施超前周边注浆。营盘坡断层：D1K857+695～D1K857+770段长度为75m。采用Ⅴ级抗水压1.0Mpa复合式衬砌，台阶法临时仰拱，拱部设置Φ76×6mm的中管棚，每环50根，每根长度为8.0m，纵向每6m一环，全环Ⅰ20b型钢拱架，间距0.6m。根据超前预报实施帷幕注浆。杨家冲断层：D1K859+350～D1K859+400段长度为50m。采用Ⅴ级抗水压1.0Mpa复合式衬砌，台阶法临时仰拱，拱部设置Φ76×6mm的中管棚，每环50根，每根长度为8.0m，纵向每6m一环，全环Ⅰ20b型钢拱架，间距0.6m。根据超前预报实施帷幕注浆。永宁镇断层：D1K859+800～D1K859+950段长度为150m。采用Ⅴ级抗水压1.0Mpa复合式衬砌，台阶法临时仰拱，拱部设置Φ76×6mm的中管棚，每环50根，每根长度为8.0m，纵向每6m一环，全环Ⅰ20b型钢拱架，间距0.6m。根据超前预报实施帷幕注浆。F1推测破碎带：D1K853+365～D1K853+415段长度为50m。采用Ⅴc型复合式衬砌，台阶法临时仰拱，拱部设置Φ42×3.5mm的小导管，每环50根，每根长度为4.0m，纵向每2.4m一环，全环Ⅰ22a型钢拱架，间距0.6m。F2推测破碎带：D1K853+700～D1K853