《a小净距分离式隧道洞口及明是洞专项施工方案.doc》由会员分享，可在线阅读，更多相关《a小净距分离式隧道洞口及明是洞专项施工方案.doc（39页珍藏版）》请在三一办公上搜索。
1、Gay is now a provincial key construction project of aluminum Ltd-province with an annual output of 50,000 tons of technical innovation project of environmental protection and energy saving of electrolytic aluminum project manager. In this technological transformation projects, he has overall respons
2、ibility for the day-to-day affairs of the project. In order to ensure that southern companys control the scale of investment, strengthen field management, pay special attention to project progress, and ensure a successful operation, the overall goal. He and Engineering Department under the leadershi
3、p of all the staff in the companys technical command, on the difficulties and to overcome technical difficulties in the process, work hard, have made outstanding achievements, mainly reflected in the following aspects: first, careful organization and management achieved remarkable results. Technical
4、 innovation project of the year, started and completed a series of bids and completed to date, from production engineering to put into production after nearly a year, has achieved very significant results. A project first 56 slots from dismantling the old slot just 168 days, civil engineering, insta
5、llation, commissioning, guarantee engineering quality under the premise, on the production side transformation under difficult conditions, created the national industrys fastest speeds. II 32 large prebaked electrolytic cell on November 7 has been installed, marks has an annual production capacity o
6、f 50,000 tons of electrolytic aluminum production capacity of aluminum. Entire project almost 8 months earlier than planned, achieved the goal of production transformation benefits that year, created favorable conditions for aluminum through South. Second, effectively control the investment. Project
7、 is subject to a scientific approach to bidding, bidding to make savings of 20 million Yuan, in the implementation process of the project, every domestic prices of steel, cement and other building materials, the old buildings on the base encountered great difficulties in dealing with significant inc
8、rease in the volume of civil engineering, but through rationalization and optimization, project control in fixed investment of 350 million Yuan. Third, environmental energy-saving effect of the project. Project investment of nearly 30 million Yuan, using large prebake technology and aluminum oxide d
9、ense phase and hyper dense phase conveying technology, fluoride and other harmful gases purification efficiency of up to 98%. Compared with Soderberg cell before the modification, power consumption can be reduced by 1500 tons of electrolytic aluminum, and project environmental protection and energy
10、saving effect is obvious. Four are in a relatively short period of time to the normal production. After four months of efforts, a project has put into operation all the 54 240KA large cell into regular production, stable current channel conditions and all the economic indicators are good, current ef
11、ficiency in October had reached 93%, is close to and reach the domestic advanced level. In the case of production half of the cell, this effect can be achieved and better level in the industry. 50,000 tons of electrolytic modification process, from preliminary study to equipment selection, cost cont
12、rol, project progress, quality control and coordination among the various sub-projects and various professional, technical command under the correct leadership, both from an overall perspective, emphasis on integrity, and earnestly implement the relevant laws and regulations, strictly act according
13、to the contract. He tried to learn relevant knowledge, good style of business, operational and organizational coordination ability, project efficiency, quality and safety assurance system in place, with all units involved with the coordination and good .隧道洞口及明洞专项施工方案单位: 中交一公局四公司XX三分部二一二年七月二十二日Four o
14、utstanding works. They are derived from their own inner feelings. I also sent a student to attend the class Department speech contest, failed to get a good result, but also actively cooperate with the Department and class activities! in order to create a demonstration dorm room, our weekly class to
15、every bedroom check, where proposed is insufficient. In order to clean up the bedroom, we use the brush brushes a bedroom again. For the class out of a force. In the event we, many projects did not get the desired results. But we understand that we tried, and in the struggle. Also has made good prog
16、ress in many of the! in my class the work carried out and the results achieved, thanks to the concern and support of the Department, thanks to instructor teachers good, proper guidance, thanks to 46 students in the class will work closely together, to work together. Of course, we also have our weakn
17、esses, needs to be further correction in their future learning and life, with a view to achieving greater results. Five declarations of good party branch branch is a fortress, a party member is a banner. Fighting in the railway engineering construction Group Headquarters Headquarters branches, a tot
18、al of members 18. Role of the Xiang-GUI railway and tight South Lebanon railway, heavy, poor conditions of disadvantage, the branch closely around the construction work. Holding high the flag of our party members, unite and lead staff on the difficulties, overcome difficulties, take the zhengyou, a
19、job well done and an engineering task, won the highly valued by leaders at all levels. Since October last year since the project began, Headquarters Branch is tightly around the center of its activities. Face South, climate is wet, sooner or later temperature larger, specific difficult, I branch fro
20、m thought requirements all workers active motivated, do can long-term hard, dare fight of spirit prepared, while requirements all members lead, encouraged colleagues Zhijian each other help, each other learning business knowledge, overcome temporarily difficult, active into to engineering official s
21、tarts of the prepared work in the to, play out has as a branch of fighting fortress role and members of pioneer model role. Since its start, I command under the correct leadership of the party branch in the Group and the superior party, centering on building a qualified party branches, branch of the
22、 forts and the battle to play the exemplary vanguard role of party members, actively working. In command personnel less, and task heavy of situation Xia, all members always according to party stronger, and style to are, and service better, and efficiency to high of requirements, from overall startin
23、g, better to completed has production organization, and coordination, and guarantees and the management work, in engineering progress, and quality, and benefits, and safety, aspects are made has good of results, get has owners and the Group and grass-roots units of praise. First, give full play to t
24、he exemplary role of party members. The exemplary role of party members and cadres are silent on the command, the exemplary role of party members and cadres are the best of the ideological and political education. We pay close attention to party building, requires political party members and cadres
25、must take the lead in learning, set strict demands on themselves, .33目录1 编制依据32 工程概况32.1工程简介32.2洞口稳定性评价32.3气象、水文42.4工程数量表52.5主要技术标准52.6隧道洞口及明洞工期安排63 总体施工技术方案63.1测量放样63.2洞顶及洞口排水系统施工63.3清表63.4边坡、仰坡开挖63.5搭设工作架、安装卷扬机73.6钻孔73.7锚杆安装及注浆73.8铺设钢筋网83.9喷射砼83.10标出隧道洞室轮廓线83.11锁脚锚杆83.12明洞工程83.13洞门83.14注意事项及异常现象处理
26、93.15爆破施工方案94 施工工艺流程及工艺要点104.1工艺流程104.2 工艺要点115 施工布置（总体布置图见附录一）135.1施工场地、便道布置135.2施工及生活用水135.3施工用电135.4炸药库（K37+815左侧）146 人员、设备安排146.1隧道施工人员配置146.2机械配置157安全措施177.1安全生产目标177.2安全管理体系框图187.3安全管理体系组织机构197.4危险源的辨识197.5管理措施（危险源的防范）208 环境保护计划及措施218.1环境保护计划218.2环境保护措施239 文明施工措施25隧道洞口及明洞1 编制依据本专项方案在符合我国国家相关法律
27、/法规/条例、XX市相关规定的基础上，主要以下列文件和资料为依据进行编制：（1）XX市交通规划勘察设计院编制的XX至XX高速公路（XX县至XX段）两阶段施工设计图及相关文件；（2）国家现行技术规范及设计技术标准：公路工程技术规范（JTG B012003）公路隧道施工技术规范（JTG F602009）公路工程质量检验评定标准（JTG F80/12004）（3）局及公司高速公路建设项目的施工经验和拟投入本项目的生产资源；（4）我部对本项目现场和周围环境调查掌握的有关资料；（5）本工程的质量标准和暂定工期及我项目的创优规划、工期目标等。（6）XX三分部实施性施工组织设计、XX隧道施工方案等。2 工程
28、概况2.1工程简介XX隧道起讫桩号为：LK38+302.05LK41+264、K38+300K41+274，左洞长度2961.95m，右洞长度2974m，其中LK38+302.05LK40+815.728(K38+300K40+817.951)位于XX境内（左洞长2513.678m，右洞长2517.951m）。明洞累计长度39.3m，其中左洞21.65m，右洞17.65m，左线级围岩及浅埋段累计占88.2%，级围岩累计占11.8%，右线级围岩及浅埋段累计占87.4%，级围岩累计占12.6%。隧道净距3016.37m，为小净距分离式隧道。进口采用削竹式洞门。2.2洞口稳定性评价本分部施工的为进口
29、（XX端）洞口，隧道进洞口位于斜坡上，斜坡坡向7090，坡角2030。隧道呈直线进洞，洞轴线与斜坡走向交角80左右，与岩层走向交角10。斜坡零星分部厚度01mm的残坡积层粉质粘土，呈松散结构；基岩为侏罗纪中统沙溪庙组紫红色砂岩为主，夹灰色薄层砂岩、粉砂岩，泥岩为极软岩。位于任市向斜北西翼，岩层产状17513，中厚厚层状，层间结合一般较差，强风化层厚24m，中风化岩体较完整。岩体发育二组裂隙：35080；28075。地下水贫乏，雨后可能有少量渗水呈滴状渗出。洞口段未见崩塌、滑坡、泥石流等不良地质现象，天然斜坡稳定。隧道开挖将在洞前及两侧一带形成人工岩质边坡，左侧坡高最大11.5m，右侧坡高最大7
30、m，根据赤平极射投影图分析:洞口临时开挖掌子面为逆向坡，其稳定性受控于岩体强度，只要削坡缓于63时，洞口临时开挖掌子面稳定；左侧边坡稳定性主要受控于裂隙1及岩体强度，按设计坡率1：0.75放坡后，边坡稳定；右侧边坡稳定主要受控于层面裂隙，因岩层产状整体平缓，开挖边坡整体稳定。但因人工开挖、爆破、坡顶加载等工程活动及裂隙水的影响，易导致潜在破裂面抗剪强度指标降低，导致边坡失稳。总体而言，隧道口地质稳定性较差。2.3气象、水文隧址区属于亚热带季风气候区，春早，夏热，秋雨绵，冬暖而多雾。年平均气温16.618.7，极端最低气温-4 .5 2002年1月12日），极端最高气温422006年7月25日）
31、。无霜期长，多年平均为108306天。气候温暖湿润，雨量充沛。多年平均降水量1224.7mm；春季35 月）雨量为331.3mm，夏季68为502.5mm，秋季911月）为333. 3mm，冬季122月）为54.6 mm。其中59月降水量占全年降水的70%， 9月份出现高峰值，占全年降水约15. 6%。该区地处大巴山迎风面，常形成雨量中心，日最大雨量曾达210.5mm2007年7月22日）。三日最大雨量357.7mm(2007年7月2225日)。隧址区地表水系属长江支流小江支流南河水系，平面上水系呈树枝状，汇于南河，南河是区内最大河流，也是地表水的最低排泄基准面，南河由西南流向北东于XX县城区
32、汇入小江。区内地表水包括南河及支流河水、水库水、堰塘水、耕田地表水等。隧址区大的地表水体主要有XX水库、XX水库、XX水库及隧道左侧沟水。XX水库位于LK40+400以南50m，XX水库位于K39+800以北约350m，XX水库位于K38+300以北约370m；隧道左侧约200m沟内有常流水，流量约1200m3/d.2.4工程数量表XX隧道洞口工程数量表编号项目材料单位左线主洞右线主洞左右线合计明洞/洞口明洞/洞口1洞口及明洞工程明洞支护C25砼拱墙m3281.2215496.22C25砼仰拱m3120972173C15片石砼仰拱填充m3117.393.4210.74碎石盲沟m4335795H
33、RB335级钢筋Kg2117116715378856HPB235级钢筋Kg96537489171417洞口洞口挖方土方m32992625618石方m32659295956189施工支护C20喷射砼m343357810砂浆锚杆(22)m1572982255411钢筋网(6.5)kg936717165312装饰天蓝色防水涂料m229295813防护绿化排水M7.5浆砌片石m325015340214三维网植草(树)护坡m28351013184815管沟C25砼m321214216HPB235级钢筋Kg14714729417HRB335级钢筋Kg777715418M7.5浆砌片石m359.665.21
34、24.819明洞回填耕种土m334120054120粘土隔水层m317210227421碎石土m3715374108922M5浆砌片石m3128982262.5主要技术标准(1)公路等级：双向四车道。(2)隧道设计速度：80km/h。(3)隧道建筑界限：10.25（净宽）*5（净高）。(4)隧道路面横坡：单向坡2%(直线段)，超高不大于3%。(5)隧道内最大纵坡：3%；最小纵坡：0.3%。(6)洞内路面设计荷载：公路级；(7)隧道防水等级：一级；二次衬砌砼抗渗等级不小于S6。2.6隧道洞口及明洞工期安排 左洞洞口及明洞：2012年8月1日2012年9月9日； 右洞洞口及明洞：2012年9月1日
35、2012年10月5日。3 总体施工技术方案3.1测量放样依据隧道洞口设计坡比，结合实际地形，确定出隧道洞口边坡、仰坡实际开挖线，并做出明显标记。3.2洞顶及洞口排水系统施工为了方便洞口排水，避免雨水直接冲刷洞口，在洞顶布置洞顶水沟，并根据洞口地形、地貌、汇水面积及雨水排泄通道，在洞口边仰坡以外5m的适当位置设置洞外截水沟，截水沟开挖以机械为主，人工配合修整，修整后立即砌筑，并用砂浆抹面；在两端截水沟增设相应端面尺寸的排水沟，将洞口排水系统与路面排水系统连接为一体。3.3清表采用挖掘机配合人工清除洞口原地面的植被，有可能滑塌的表土及危石等，保证刷坡时的顺利施工。3.4边坡、仰坡开挖采用圆角法，根
36、据测量放样所定出的边坡开挖线，选用操作熟练的机手，利用挖掘机自上而下逐段开挖，不得掏底开挖或上下重叠开挖；石质地层仰坡需要爆破时，应以浅眼松动爆破为主，局部也可采用人工配合修整，开挖时要随时检查边坡和仰坡，如有滑动、开裂等现象，应适当放缓坡度。开挖后边坡坡度不陡于设计值。3.5搭设工作架、安装卷扬机上级边坡开挖后，利用仰坡平台与坡面，用钢管搭设简易施工架，用于边坡钻孔、挂网、喷砼；在管架上安装滑轮，穿上卷扬机钢丝绳，在适当位置安装卷扬机。3.6钻孔测量放样定出锚杆孔位,用油漆做好标记。人工手持风钻钻孔，钻头尽量与岩层主要结构面垂直，不宜平行岩面；孔径及孔深要满足要求。3.7锚杆安装及注浆1)砂
37、浆锚杆将水注入牛角泵内，水占泵体积的2/3，初压水和稀浆湿润管路，然后再将已调好的沙浆倒入泵内，将注浆管插至距孔底510cm处，堵塞孔口，将泵盖压紧密封，就绪后慢慢打开风阀开始注浆，在气压推动下，水在前，砂浆在后，水湿润泵体和管路，引导砂浆进入锚孔。锚杆头在孔内就位后，将堵塞孔口水泥纸掀开，随即迅速将杆体插入并安装到位。若孔内无水泥砂浆溢出，说明砂浆不足，应将杆体拔出重新灌注后再安装锚杆；锚杆杆体插入孔内的长度不小于设计规定。锚杆安设时，不得随意敲击。2)中空注浆锚杆先安装好锚头再将杆体送入锚孔并推到预定位置，保证锚杆体位于锚孔正中间，检查锚杆体在孔内的固定情况；将止浆塞套入锚杆体并封住锚孔外
38、端口，以防止砂浆外溢。用注浆接头将锚杆体与注浆泵相连，安装锚杆体垫板和螺母，若铺设有钢筋网，可利用垫板将钢筋网固定。注浆时宜选用额定工作压力不小于1.5MPa的注浆泵，砂浆标号按设计(无设计时不低于20号)。3)小导管注浆导管需在管体中间钻梅花型浆孔，孔距一般为0.2m(尾部1m不设压浆孔)。锚杆孔位钻设完成后，小导管沿孔布置，间距按设计要求。用注浆接头将注浆导管与注浆泵相连，准备就绪后即开始单液注浆；水泥浆水灰比为0.8:1、0.7:1、0.6:1三个等级，水泥浆由稀到浓逐级变化，即先注入稀浆，然后逐级浓到0.6:1的水灰比为止。注浆过程中压力保持在0.51.0MPa。3.8铺设钢筋网 按设
39、计尺寸加工钢筋网，利用外露锚杆头将钢筋网悬挂于坡面上，网片间点焊连接，再将钢筋网与锚杆头焊接成整体。3.9喷射砼喷射砼前压缩空气或压力水将待喷面吹净，吹除松散杂质或尘埃。砼采用强制搅拌机拌和，喷射砼采用先下后上S型喷射方式分层喷射，在喷射砼达到初凝后方可喷射下一层。喷射时严格控制风压同时保证喷射速度适当，喷嘴与受喷面距离保持在0.6m1.2m，喷射角度接近90，正确掌握喷射顺序，不得出现蜂窝，喷射厚度不得小于设计值。3.10标出隧道洞室轮廓线测量人员准确放样，用油漆标出洞的中心线，通过高程测量标出拱顶位置，通过轮廓线上点与中心线的距离标出轮廓点，加密轮廓线，依次定出整个隧道轮廓线。3.11锁脚
40、锚杆隧道轮廓线外按设计要求打设锁脚锚杆，注浆。3.12明洞工程1)明洞衬砌采用C25钢筋混凝土衬砌，挡水耳墙与明洞二次衬砌同时浇筑，并与明洞拱墙背顺接。2）明洞开挖临时刷坡线根据实际地质情况确定，临时开挖边坡采用喷锚、网联合支护。3)为了保证洞口边仰坡在施工和使用期前的稳定，在钢筋混凝土衬砌达到设计强度后，墙背及拱上部分按照设计（仰坡面1:1.5）分别采用M5浆砌片石、碎石土及时回填密实，然后夯填粘土隔水层，再回填耕种土。粘土隔水层设为向洞外1%的流水坡，回填时注意对称进行，防止拱圈因不对称加荷产生开裂。隔水层应与边、仰坡搭接良好，密封紧闭，防止地表水下渗影响回填土的稳定。3.13洞门1)洞门
41、衬砌拱墙应与洞内相联的拱墙同时施工，连成整体。接长明洞的洞门应按设计采取加强连接措施，确保与已成的拱墙连接良好。2)洞门端墙砌筑与墙背回填两侧同时进行，防止对衬砌墙产生偏压。3.14注意事项及异常现象处理1)洞口施工应尽量减少对原地表植被的破坏，尽量采取人工或机械开挖，不得随意采用爆破施工。2)进洞前应尽早完成洞口排水系统。3)洞口施工应避开降雨期和融雪期。4)注浆管不准对人放置，注浆管在未打开风阀前，不准搬动，关闭密封盖，以防止高压喷出物伤人。5)发生串浆现象，即浆液从其它孔中流出时，采用多台泵同时注浆或堵塞串浆孔注浆。6)严格执行操作程序，防止砼喷射机堵塞；如有堵塞，应立即关闭马达，随后关
42、闭风源，并将软管拉直，然后以小锤敲击找到堵塞位置，将风压开至0.3 MPa0.4MPa,同时继续敲击堵塞部位，使其排除堵塞物而畅通。排除堵管现象时，应注意喷嘴前方严禁站人，以免发生伤人事故。3.15爆破施工方案光面爆破作业标准及操作要点：根据新奥法施工的原理，采用光面爆破开挖。施工前根据围岩级别情况进行施工区段（标明里程）的钻爆设计，进行详细的技术交底，对钻孔施工人员（风钻台数）明确分工、分区。钻孔前，用全站仪、水准仪确定出开挖的中线、水平，按围岩级别调整断面的爆破参数，根据掌子面上的激光点位，标出炮眼位置，画线偏差不得大于1cm。（隧道松动爆破每m岩石使用炸药约1.25 kg1.4kg，装药
43、率0.50.75）根据已开挖断面测出的开挖轮廓线及计算的超欠挖值，分析超欠挖原因并及时调整钻爆参数，提高光爆质量。风钻按规定就位，接通风、水、电路，开钻时先送水，后送风。手风钻开孔时，宜用1m以内的短钻杆，待钻孔定位并钻进0.5m以上后再换长钻杆。炮眼间距偏差：掏槽眼不大于2cm，周边眼与内圈眼不大于3cm，周边眼眼底不得超出外轮廓5cm，其它眼不大于5cm。司钻中随时观察每臂（台）钻进情况，利用已打好的眼中插炮棍作标志，掌握好钻眼方向，以达到“准、直、平、齐”的要求。坚持顺邦打眼，钻臂（风钻）紧贴岩壁，最大限度地减少超挖。周边眼外插角不大于1.5，底板眼方向与隧道坡率基本相同。掏槽眼位置可根
44、据掌子面围岩结构特征适当调整，掏槽眼较掘进眼深20cm，以取到较好的开挖进尺。装药前必须用高压风管吹孔或用手风钻扫孔，对坍孔内石碴要用掏勺仔细清理，无法装药的应补眼。爆破工从药库领出的药卷和导爆管必须确认并保存好段数标记。装药采用人工台架装药，装药时必须专人操作，并制定相应的安全规程。炮孔口用炮泥堵塞，炮泥用炮泥机制作，成分为泥土、砂和水；合理的重量百分比为土：砂：水=7080：810：1320，最小密度必须达到1.90g/cm并具有较好的柔软性，炮眼堵塞长度不小于30cm。起爆网络按钻爆设计的形式连接，主爆网络采用双管双索，以确保可靠起爆。网络连接好后由爆破工再次检查确认，无误后进行施爆。光
45、面爆破工艺框图4 施工工艺流程及工艺要点4.1工艺流程边坡及仰坡放样开挖排水系统基坑砌筑截水沟、排水沟边坡仰坡清表开挖最高级边坡、仰坡检查坡度及稳定情况搭设简易钻空工作架、安装卷扬机钻孔安装系统锚杆注浆(注浆锚杆)挂设钢筋网喷射砼开挖一级边坡、仰坡检查坡度及稳定情况钻孔安装系统锚杆注浆(注浆锚杆)挂设钢筋网喷射砼依次逐级往下循环作业开挖一级边坡、仰坡测量放样定出洞的轮廓钻孔安装系统锚杆及锁口锚杆喷射砼锚喷支护成品验收准备进洞。4.2 工艺要点4.2.1明洞浇筑质量标准明洞浇筑质量控制标准项次检 查 项 目规定值或允许偏差检查方法和频率1混凝土强度(MPa)在合格标准内按附录D检查2混凝土厚度(
46、mm)不小于设计尺量或地质雷达：每20m检查一个断面，每个断面自拱项每3米检查1点。3混凝土平整度(mm)202m直尺：每10m每侧检查2处1) 混凝土表面密实，每延米的隧道面积中，蜂窝麻面和气泡面积不超过0.5%，深度超过10mm时应处理。2) 结构轮廓线条顺直美观，混凝土颜色均匀一致。3) 施工缝平顺无错台。4) 混凝土因施工养护不当产生裂缝。 4.2.2防水层质量标准防水层质量控制标准项次检 查 项 目规定值或允许偏差检查方法和频率1搭接长度(mm)100尺量：每环测3处2卷材向隧道延伸长度(mm)500尺量：检查5处3卷材于基底的横向长度(mm)500尺量：检查5处4沥青防水层每层厚度(mm)2尺量：检查10点防水卷材无破损，接合处无气泡、折皱和空隙。不符合要求时，一处减1分，并采取修补措施或返工处理。4.2.3明洞回填质量标准明洞回填质量控制标准项次检 查 项 目规定值或允许偏差检查方法和频率1回填层厚(mm)300尺量：回填一层检查一次，每次每侧检查5点2两侧回填高差(mm)500水准仪：每层测3次3坡度不大于设计尺量：检查3处4
