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1、中交第一航务工程局有限公司 京沈京冀铁路客运专线JSJJSG-6标段东伍岭隧道挑顶进洞专项施工方案京沈京冀铁路客运专线JSJJSG-6标段东伍岭隧道辅助坑道入正洞挑顶施工方案 编制： 复核： 审核： 中交第一航务工程局有限公司京沈京冀客专标段指挥部2014年09月11日目 录1编制说明11.1编制原则11.2编制范围11.3编制依据12工程概况22.1隧道概况22.2辅助坑道工程概况23施工组织安排23.1施工组织机构23.2施工安排34 施工组织方案54.1总体思路54.2斜井进入正洞施工方案64.3施工注意事项105主洞开挖及支护施行方案105.1超前小导管施工105.2台阶法施工125.
2、3三台阶法135.4锚喷支护196塌方处理措施206.1封闭坍塌面206.2注浆固结坍塌岩渣206.3钢花管超前支护206.4架设工字钢架206.5监控测量217质量、进度、安全、文明、环保保证措施217.1质量保证措施217.2进度计划保证措施227.3安全施工保证措施237.4文明施工保证措施247.5环境保护措施25Opinions and suggestions on the partys mass line educational practiceAccording to the central and provincial, municipal unified deployment
3、, according to municipal Party committee about carrying out the partys mass line educational practice activity in the citys implementation opinions, the spirit of the partys mass line educational practice activities from 20* in January to 99 months, carried out at all levels of departments and direc
4、tly affiliated institutions and grass-roots party organizations. According to my actual County, the county to carry out the education practice put forward the following implementation opinions.First, the overall requirementsCounty county education practice to the eighteen Party of eight, the spirit
5、of the the third Plenary Session of the 18th CPC Central Committee as the guidance, conscientiously implement the spirit of general secretary Xi Jinping book series of important speech, earnestly implement the Central Committee really, opinions and advice , party implementing the guiding ideology of
6、 opinions to determine the objectives and requirements, step method, in accordance with the look in the mirror, dress up, wash bath, cure treatment, the general requirements of for the people pragmatic honest people as the theme, in carrying forward the spirit of Zhuanglang Zhuang, improve their wor
7、k style, service to the masses of the people, the foundation of consolidating grassroots, promote transformation across efforts, to further implement the central eight regulations and The opposition party and government austerity waste regulations , double section provincial regulations, municipal p
8、rovisions of the twelve plan and the implementation measures for on improving the work style of close ties with the masses law, highlight style building, carry out the whole wind spirit, resolutely oppose formalism, bureaucracy, hedonism and wasteful extravagance to solve the problems, Party members
9、 and cadres of the style and the masses of people strong, the Ministry of Party members and cadres to further improve their thinking and understanding, to further change the style of the wind, the masses to close, honest and pragmatic people honest image to further establish the foundation to furthe
10、r reinforce the basic level. Style of the building of the new results to promote the construction of a powerful force of the county and the ecological culture of the county and county construction.In educational practice activities of the unit is mainly: the county and below county departments under
11、 the organs, enterprises and institutions directly under the township, street, and community, village, non-public economic organizations, social organizations and other grass-roots organizations. Agencies and branches, each single unit, follow the rules on internal institutions. Educational practice
12、 with step by step.To adhere to the county leadership, leadership and leading cadres to focus on outstanding catch to directly contact the service of the masses of law supervision departments and window units, service industry, educational practice, pay attention to grasp the heavy towns, streets an
13、d villages, community education activities and the masses of grassroots groups in close contact to strengthen, and the majority of Party members, cadres and the mass line line Marx doctrine view of the masses and the partys education.Always speak seriously as a basic attitude, adhere to positive edu
14、cation, to carry out criticism and self criticism group, adhere to the pragmatic, more emphasis on leadership, pay more attention to the layers of the demonstration, more focus on the four winds, solve the problem, pay more attention to open the door, the participation of the masses, pay more attent
15、ion to the classification guidance. Orderly, pay more attention to the cooperation and cohesion driven, more strict requirements on injection, really supervision practice, ensure education practice is not empty is not empty is not partial, not as a mere formality.Two, the key point of the taskThe ma
16、in task of the countys education practice is to seize against four wind this focus on centralized solve outstanding problems asked County, township leadership and leading cadres of the four winds, the disadvantages of the style, scale behavior to a large scale investigation, overhaul, cleaning great
17、ly. At the same time, respond to the concerns of the masses, safeguard the interests of the masses, pay attention to solve practical problems, solve the people around the unwholesome tendencies especially on eat, take the card, Yong lazy luxury, extravagance and waste fees, privileges and other issu
18、es, timely and effective, without any discount to solve, to improve the style of real implementation of the requirements of real to the grassroots, real let group Benefit the public.(a) focus on solving the four winds outstanding issuesThe central and provincial requirements, the county leadership a
19、nd leading cadres of key performance concept is not correct, do not dare to play, to engage in image project, political project, a leadership guide, a set of ideas, orders and prohibitions, and a policy, there are countermeasures county. The units directly under the heavy focus on solving Yung lazy
20、drag, buck passing skin, work is not implemented, the service is not active. The dynamic problem of law enforcement and supervision departments and window units, service industry mainly solve the door hard, ugly face, something difficult, and arbitrary charges, fines, levies, and breach of privilege
21、, chinakayao, not the problem of law. The township, street The collar of leading bodies and leading cadres to solve key does nottheir own conditions to develop the correct road, the maximum to avoid investment risk, gain profit.(three) vigorously promote the brand. To establish brand awareness, awar
22、eness of the use of brand, brand value, brand acquisition performance, enhance the competitive strength. Concentrated manpower, careful planning, packaging and publicity of a number of unique, market influence and coverage of the brand, the implementation of key breakthroughs, to enhance the competi
23、tive strength, walking business road the competition of alienation and characteristics, the pursuit of stability and development of the market.(four) to promote the integration of resources. To further broaden their horizons, effective integration of resources within the group, the city resources, o
24、ther industries and regional resources, mutual trust, mutual benefit, seeking win-win principle, in the framework of national policies and regulations, strict inspection and argumentation, legal consultation, examination and approval procedures, strict regulation of economic activities, attract inje
25、ction the social investment to the industry group, to achieve leveraging the development, ensure that the value of state-owned assets.(five) to strengthen the construction management personnel. Strengthen the management of education and training of cadres and workers of the existing business, firmly
26、 establish the concept of the market, enhance the sense of crisis to adapt to market competition, the sense of urgency, improve the ability to respond to market competition, improve management and operation of the market. At the same time, according to the need of industrial development, vigorously
27、the introduction of high-quality management management personnel, and strive to build a high-quality professional management team, hard work, and promote the entire workforce knowledge structure, age structure, structure optimization and upgrading ability, enhance core competitiveness, adapt to the
28、need of market competition.(six) seriously study the policy for policy. Serious research about social support the development of cultural undertakings in the country and the XX policy, especially the policy of industrial development, financial investment policy, financial policy and tax policy, and
29、actively seek policy, projects and funds, enterprise and industry group mission to promote leapfrog development.1编制说明1.1编制原则遵循工程建设规律和技术规律，围绕安全质量目标，合理安排工艺流程和施工顺序。充分利用现有人员与设备，做到配套、实用，合理调度,做到辅助坑道转正洞施工与辅助坑道自身施工互不影响。尽量减少临时工程，科学布置施工平面图，统筹安排各单项工程进度。对施工现场全过程控制，实行动态管理。1.2编制范围本方案适用于东伍岭隧道辅助坑道转正洞施工作业，主要介绍东伍岭隧道辅
30、助坑道转入正洞施工及正洞施工的方法。1.3编制依据 东伍岭隧道通风指导性设计图及其他有关设计文件、施工图、实施性施工组织设计、招投标文件等。 现场实地踏勘调查资料。 工程所在地的地理位置、交通条件及地质条件。 原铁道部和中国铁路总公司现行设计规范、施工规范、验收标准。同类工程施工资料及相关施工工艺。 可利用的新技术、新工艺、新材料、新设备资料。国家、行业及河北省有关工程建设的法律、法规、标准、条例。2工程概况2.1隧道概况新建北京至沈阳铁路客运专线河北段站前工程JSJJSG-6标起止里程为DK147+996DK174+668，正线长26.86km。标段内的隧道2座长22.365km。二工区承担
31、线路全长11.29km（起讫桩号为DK163+380DK174+668）；途经娘娘沟村、南塔子沟村、河南营村等。该合同段的工程项目包含11033m隧道一座。东伍岭隧道位于承德市双滦去陈栅子乡境内，隧道起讫里程为DIK163+380 DK174+413，全长11033m，设计为单洞双线隧道。隧道内线间距5.0m，最大埋深491m。2.2辅助坑道工程概况为加快施工进度，满足工期要求，本隧道设置横洞一座，斜井两座，横洞和斜井均设于线路前进方向左侧，与大里程方向夹角分别为137、106.3、90，长度为165m、800m、640m。均采用无轨运输，净空采用双车道断面。工程特点：工期紧，任务重。工程难点
32、：一是不良地质条件下开挖、支护；二是确保安全前提下，快速施工；三是合理组织开挖和通风排尘。3施工组织安排3.1施工组织机构主要工程技术和管理人员由单位选派，抽调专业技术能力强、综合素质高，曾参与过长大隧道施工的人员负责本工程施工。施工组织机构见图3.1-1。图3.1-1 施工组织机构3.2施工安排3.2.1人员安排组织在隧道工程施工方面具有三年以上施工经验，并对其进行过专业知识培训的作业人员，组成专业化施工队伍。根据隧道施工的特点、难点，安排较强的隧道施工班组形成独立的作业面负责东伍岭隧道辅助坑道转正洞挑顶施工。作业班组任务及劳力配备表见表3.2-1。表3.2-1 作业班组任务划分及劳力配备表
33、序号作业班组人数任务安排1土石方开挖班30担任主洞的两作业面的土石方开挖2喷锚支护班20担任主洞喷锚支护任务，含锚杆、挂网施工3出碴班15担任土石方运输工作4测量班3担任测量放样工作5工地相关试验2负责工地相关试验工作配备机械操作手：挖掘机司机2人，装载机司机3人，空压机操作手2人，焊工6人。3.2.2机械设备安排为在规定工期内完成施工任务，必须实现辅助坑道开挖的快速施工，这就对机械设备配备提出了高要求。针对上述情况，平导进正洞挑顶施工在机械设备安排上，根据施工进度计划，加强机械设备的投入。投入的主要施工机械见表3.2-2。表3.2-2 主要施工机械表序号设备名称规格型号数量计划进场日期1挖掘
34、机PC220-6Z1台2010.6.252装载机柳工50C3台2010.6.273空压机重庆4L-20/87台2010.6.304湿喷机TK5002台2010.6.306全站仪TS15a1台2010.6.257水准仪DNA3001台2010.7.18凿岩机YT-2817台2010.7.13.2.3物资供应安排为确保施工过程中，物资材料供应及时，且质量、数量满足工程需要，在物资供应安排上做到有组织有计划地进行采购与供应，并做好材料的储备工作，保证施工用料。施工前，还要做好供水、供电的安排。施工用水可利用高山水池内的水，采取管道供水方式，将水输送到工作面。施工用电可利用平导内既有的电线线路供电。4
35、 施工组织方案4.1总体思路辅助坑道开挖接近正洞时，逐渐抬高辅助坑道拱顶高程，接长钢架长度。从正洞与辅助坑道相交处起，采用棚架进入正洞，进行交叉段正洞开挖。棚架斜向上爬坡开挖至正洞中线处达到正洞拱顶高程，再向前以平坡开挖至正洞外侧上台阶拱脚位置，然后再棚架内设置套拱。在套拱内再施做正洞上台阶初期支护后，再向两侧（正洞方向）按标准的正洞断面进行正洞开挖。施工示意图见图4.1-1、图4.1-2图4.1-1 施工顺序图图4.1-2 辅助通道与主洞相交平面图4.2斜井进入正洞施工方案4.2.1施工准备由项目部测量班加密导线点，测量班配合放出洞内的导线点并进行复测，没有问题后进行交底，以此导线点控制主洞
36、断面及中线。在辅助坑道贯通前，主洞开挖台车的主体结构要加工完毕。主洞开挖台车采用变截面活动台车，可以加宽加高。主体框架在洞外加工场加工完后在洞内拼装。4.2.2施工工艺 辅助坑道交叉段根据辅助坑道与正洞之间的高差，确定辅助坑道拱顶的扩挖起始里程，其拱顶抬高坡度控制在30以内。辅助坑道与正洞交接处设置0.6m加强环，加强环中设置3榀I25a辅助坑道型钢钢架，外侧增设I25a门型钢架，门型钢架分节与辅助坑道钢架焊接在一起。相邻钢架采用22纵向钢筋连接，间距1m。I25a门型钢架由横梁和立柱组成，横梁与辅助坑道I25a钢架之间的空隙，从两侧对称焊接竖向I25a型钢立柱短撑，间距50cm，钢架安装后该
37、空隙喷射混凝土回填密实。在横梁上按正洞套拱的间距纵向设置I20a钢柱头，以作为正洞套拱的支撑点。门型钢架每侧增设610根50锁脚锚杆和系统锚杆。交叉段门架底脚处设I25a横梁，提高门架整体刚度。在靠近正洞处辅助坑道初期支护的7榀拱架增设仰拱钢架，正洞仰拱钢架与辅助坑道加强环最外侧的仰拱拱架焊接，正洞仰拱衬砌钢筋与辅助坑道仰拱衬砌中预埋钢筋连接，确保正洞和辅助坑道仰拱衬砌中预埋钢筋连接，确保正洞和辅助坑道交叉口处的紧密连接，能共同受力。详见图4.2-1。图4.2-1横向棚架法正面示意图 棚洞开挖辅助坑道二次衬砌完成后，按垂直正洞走向采用4.04.2m（顶部净宽2m)的棚洞以上坡方式开挖到中线位置
38、，然后再向前平坡开挖至正洞外侧上导坑拱脚位置处，棚洞钢架临时支护及时跟进。棚洞钢架采用I18型钢，间距60cm，底部设置横向支撑，使棚洞钢架形成临时封闭环，并设置8根50锁脚锚杆，必要时横梁两段设竖向支撑。其他临时支护参数：8钢架网。网格间距2020cm，22系统锚杆，长度3.0m，间距1.01.0梅花型布置，喷射25cm混凝土。施工中，棚洞临时支护体系中的顶部钢架横梁位于正洞初期支护外，下一步施做套拱时不再取出，所以棚洞拱顶高程超出正洞设计开挖线，以满足套拱临时支护厚度和预留变形量需要。详见图4.2-2图4.2-2 横向棚架法加强环侧面示意图 套拱及正洞施工 棚洞施做完毕后及时在其钢架内侧施
39、做宽度为2.0m的套拱。 棚洞内的套拱施做完毕后，安设正洞初期支护钢架，并与套拱钢架错开设置。钢架一侧落脚于辅助坑道交叉口二次衬砌混凝土的预埋钢桩上，另一侧支在混凝土垫块上，在钢架分节和拱脚处各施做长4m的50锁脚锚管两根。 棚洞内的正洞初期支护完成后，拆除棚洞一侧临时支护后施做套拱，在套拱保护下进行正洞上台阶开挖预支护，待正洞开挖和支护约10m后封闭掌子面，再拆除棚洞另一侧临时支护并施做套拱后，进行另一端正洞上台阶开挖预支护。待施工空间满足后，两侧工作面可以同时施工，应确保在斜井宽度范围内有套拱保护。 套拱钢架为I20a型钢，棚洞内设有套拱钢架4榀，间距60cm，两侧（46m范围）延伸套拱钢
40、架间距为80cm，每侧各6榀，套拱钢架采用22连接筋纵向连接，间距80cm，并喷射25cm后混凝土。 套拱钢架一侧落脚于辅助坑道加强环处的I20a钢柱头上，另一侧落脚于正洞起拱线处纵向放置的【32a槽钢上，并在此处设置60cm宽的扩大拱脚，每榀设2根长4m的50锁脚锚管。4.3施工注意事项 辅助坑道进入正洞开挖前，必须先完成辅助坑道交叉段二次衬砌。 辅助坑道交叉口的加强环必须深入正洞初期支护断面，保证为正洞的支护提供有力的支撑。 在辅助坑道向正洞转化的整个施工过程中，加强监控量测工作，并及时根据量测数据进行调整支护参数和施工工序。 正洞交叉口段开挖后要及时进行正洞仰拱，二次衬砌的施工，以便初期
41、支护与仰拱尽早成环，确保施工安全。加强交叉口段内的通风，在抬高进入正洞的导洞内应设置降温设备。5主洞开挖及支护施行方案东伍岭隧道1#横洞和2#斜井与正洞交接的地段为级围岩，采用小导管超前支护、台阶法施工，东伍岭隧道3#斜井与正洞交接的地段为级围岩，采用小导管超前支护、三台阶法施工。5.1超前小导管施工小导管布置拱部分别以140范围内布设，小导管采用42小导管，壁厚3.5mm，小导管长3.5m，纵向每2榀钢架打一环，一般地段环向间距3根/m，施工外插角1015，小导管水平搭接长度不小于1.0m。钻孔先将小导管的孔位用红漆标出，钻孔的方向垂直于开挖面，仰角1015。采用风枪或凿岩台车成孔。钻孔钻进
42、避免钻杆摆动，保证孔位顺直。钻至设计孔深之后，用吹管将碎砟吹出，避免塌孔。顶管在钻孔内插入42mm钢花管，在管尾后段30cm处，将麻丝缠绕在管壁上呈纺锥状，并用胶带缠紧。开动钻机，利用钻机的冲击力将钢花管顶入围岩中，钢管顶进长度不小于90%管长。固定顶管至设计孔深后，将钢花管与孔壁之间的缝隙封堵。孔口露出喷射混凝土面15cm，安装钢拱架后与拱架焊接在一起。小导管注浆小导管注浆见图5.1-1，图5.1-2。封闭工作面准备工作安装钢插管制作钢插管钻 孔联结管路及密封管口机具设备检查压水检查达到要求注浆注浆压力流量达到要求结束否否是图5.1-1小导管注浆施工工艺流程图图5.1-2 小导管注浆施工示意
43、图超前小导管岩质地段注水泥浆，黄土地段不注浆。5.2台阶法施工东伍岭隧道1#横洞和2#斜井与正洞交接的地段为级围岩，采用台阶法施工，先护后挖，机械出碴。施工时要严格遵守软弱围岩不良地质地段 “超前探、管超前、短进尺、强支护、早封闭、勤量测”的原则。开挖顺序说明： 下列顺序在施工辅助措施完成并达到强度后进行。拱部开挖； 组合中空锚杆施工，L=3.5m；22砂浆锚杆施工，L=3.5m；初喷C25砼4cm厚，挂网2020cm；立拱部钢架，间距1.0m;喷C25砼至设计厚； 左侧边墙部位落底；重34步； 右侧边墙部位落底；重34步； 下部剩余部分开挖；立下台阶拱架，喷C25砼至25cm厚，至此，初支闭
44、合完成；步骤说明及关键工艺要求：开挖应尽量减少对地层的扰动。下台阶开挖，视前步工序稳定情况进行。为防止上台阶初期支护下沉、变形，其底部加设槽钢托梁，托梁与钢架连为一体，并于每榀拱架设置两根22mm锁脚砂浆锚杆与纵向槽钢焊接，锚杆单根长度L=2.5m，布设俯角45。台阶长度控制在1015m，初期支护紧跟掌子面，使整个断面尽快形成封闭式初支。5.3三台阶法东伍岭隧道3#斜井与正洞交接的地段为级围岩，采用三台阶法施工。5.3.1施工方法上、中、下三个台阶同时施钻，装药、连线、放炮，上台阶开挖高度控制在3.74m，开挖进尺IV级围岩控制在2榀钢架(1.5m)以内，V级围岩控制在1榀钢架(0.75m)以
45、内，有必要时预留中部核心土；中台阶开挖高度控制在3.5m以内，开挖进尺控制在2榀钢架(1.5m)以内，下台阶开挖高度控制在3.5m以内，开挖进尺控制在2榀钢架(1.5m)以内，上、中台阶长度控制在35m以内，确保作业机械有足够的作业空间及全断面及时封闭成环；上、中、下三个台阶同时放炮后，采用挖掘机将上、中台阶的洞渣扒至下台阶，同时整理掌子面、拱墙岩面、撬棒找顶，清理危岩，修整上中下台阶联系通道及下台阶洞渣；上、中、下三个台阶同时初喷35cm砼封闭掌子面及拱墙；用装载机配合自卸汽车出渣；初期支护施作，打设锚杆、铺挂钢筋网、架立钢架；复喷砼至设计厚度；具体实施过程及注意事项:施工准备。开挖前技术上
46、测量放样，用油漆将开挖轮廓线准确标出，便于钻眼人员施钻。此时，喷浆班应将上一循环的喷浆设备清理到位，开挖班应该将钻眼设备及简易台架布置好，测量放样在30分钟内结束，钻眼人员在测量时开始布眼等准备工作。钻眼爆破，严格控制超挖，减少喷浆时间。上台阶保证至少5台风钻钻眼，中台阶5台，下台阶6台。爆破前30分钟通知出渣班人员机械洞口等候，响炮则进洞扒渣，由挖机在上台阶找顶排险并将上中台阶洞碴扒至下台阶，在快要结束时，喷浆班洞口准备，扒渣结束，开始初喷。装载机配合出渣车在下台阶出渣。初期支护。支护班应在出渣快要完成时准备工作全部就绪，锚杆、钢筋网、型钢应在3h内完成，复喷在6h内完成，配置4台喷浆机，上台阶2台，中、下台阶各1台； 工艺流程详见图5.3-1。光面爆破工艺要求：设计原则据地质条件，开挖断面、开挖进尺，爆破器材等编制光面爆破设计方案。根据围岩特点合理选择周边眼间距及周边眼的最小抵抗线，辅助炮眼交错均匀布置，周边炮眼与辅助炮眼眼底在同一垂直面上，掏槽眼加20cm。严格控制周边眼装药量，间隔装药，使药量沿炮眼全长均匀分布。选用低密度低爆速、低猛度的炸药；本工程采用乳化炸药，非电毫秒雷管采用微差爆破，周边眼采用导爆索起爆，以减小起爆时差。放样布眼定位开眼钻 眼清 孔装 药 联起爆网络地质调查初步爆破方案光爆参数选择掏槽眼设计周边眼设计修改爆破设计没达标起 爆通 风光爆效果检查