生料均化库人工挖孔桩施工实施方案.doc

一、编制依据及工程概况1.1编制依据1.1.1安徽海螺建材设计研究院设计的广西扶绥海螺水泥有限公司扶绥海螺三期5000t/d熟料扩建工程生料均化库施工图（蓝图C47c-04）；1.1.2国家现行有关的施工及验收规范、规程、标准；1.1.3我公司类似工程的成功施工经验；1.2 工程概况1.2.1 生料均化库人工挖孔桩灌注桩计42根,ZH1桩径1300,16根; ZH2桩径1200,20根；,ZH3桩径1000, 6根;桩顶标高均为-3.900m。1.2 .2人孔桩均采用钢筋砼护壁, 砼标号C40,钢筋采用6150双向，环行护壁上部厚度180mm。护壁下部厚度120mm。桩身砼及配筋：ZH-1采用C40砼，配2218等分设置的主筋及10200箍筋；ZH-2采用C40砼，配2018等分设置的主筋及10200箍筋；ZH-3采用C35砼，配1616等分设置的主筋及10200箍筋；焊接加劲箍均为162000。钢筋HPB235（），HRB335（），保护层厚度为50mm。1.2.3 ZH1、ZH2 、ZH3桩端持力层为层(较完整灰岩),端桩以下5m范围内应无软弱层、溶洞等,并应在5倍桩端直径范围内无岩体临空面。ZH1、ZH2、ZH3桩端全断面进入层(较完整灰岩)不小于一倍桩直径,每边扩底300mm。二、施工准备及施工部署2.1施工准备2.1.1全面调查施工现场针对地上、地下障碍物制定排障计划和处理方案，并加以实施。2.1.2根据建设单位提供的建筑坐标控制点、控制桩、水准点和施工图纸，进行测量放线工作，基础开挖范围内所有轴线桩，水准点都要引出机械施工活动区以外，并加以保护。2.1.3根据轴线桩、施工图纸和工程地质资料，测放基础开挖线；2.1.4组织施工人员学习图纸和自审，进行各专业图纸会审，设计交底和施工技术交底。2.1.5编制各分部分项工程作业指导书（人工挖孔扩底桩）。2.1.6编制施工预算，准备工程和施工用料，包括甲供材料（如钢材、水泥、碎石等的用料申报）以及自供材料（如砂、模板等）的进场和准备。2.1.7整平场地，修筑运输通道，并做好场地排水沟。2.1.8修建临时设施，铺设安装临时供水、供电线路。2.1.9组织施工机械设备、周转材料等的进场就位安装。2.1.10遵照ISO90012000标准，编制项目质量计划和施工保证手册，做好进场人员的技术培训工作，形成规范化的施工工艺标准。2.2 施工部署2.2.1生料均化库挖孔桩施工计划投入30人；2.2.2为方便施工及加快施工进度，先使用机械将基础土方大开挖至-3.90m并平整。2.2.3采用一台DJY350型搅拌机搅拌护壁砼。三. 施工技术要求3.1 人工挖孔桩施工流程测量定位放线基础土方大开挖并平整定桩位线并报验挖第一节桩土方支模浇筑第一节砼护壁在护壁桩上投测桩位十字轴线及标高安装运土设施布设潜水泵,照明等其他设施第二节桩身挖土清理桩孔校核桩径及桩身垂直度放钢筋网片拆除上节护壁模板支下节模板并浇筑护壁砼重复上道工序,循环作业至持力层扩底爆破入岩检查验收经确认后放钢筋笼浇筑（检测）凿桩头3.2设置控制点根据建设方提供的施工图纸及现场点位坐标，相应控制点标高拉出四根相交线，准确定出原始圆心位置，挖好后再根据此圆心位置准确支好砼护壁模板。3.3成孔作业(1)分段挖土和出土:使用风枪破土,再用铁铲将土装入小桶,由手摇辘轳将土运出.孔内挖土工人与孔上提土人要协调配合.在土质较好的条件下,一节孔桩的高度约1米,一节桩孔土方挖完后,应用长度为桩径加二倍护壁厚度的竹竿(或木杆)在桩孔上下做水平转动,若能自由转动,说明所挖的土方直径符合设计要求,可以安装护壁摸板浇筑护壁砼,否则还要继续进行,中途不宜停歇,否则四周孔底及四周土体经水浸泡易发生坍塌.挖出的土方要及时运走不得堆积在孔口附近。 (2)安装护壁钢筋和护壁模板:模板采用角钢制作骨架、钢板做面板的定型模板. 模板之间用螺栓连接. 模板高度为1米,拼装后成为一个圆台体,上小下大,拼装时,最后两块模板的接缝处宜夹放一木条,以便拆模.桩孔挖土完毕后经验收合格后方可安放钢筋,然后才能安装护壁模板.护壁竖向钢筋端部宜弯成发夹式的钩并打入至挖土面内一定深度,以便与下一节护壁中的钢筋相连接. 模板安装后应检查其直径是否符合设计要求,并保证任何二正交直径的误差不大于50mm,其中心位置可通过孔口设置的轴线标记处安放十字加,在十字架交叉口点悬吊锤球的方法来确定.要求桩的垂直度偏差不大于桩长的0.5%,符合设计要求,可用木楔打入土中稳定模板,防止浇筑捣砼是发生移动。(3)灌注护壁砼:护壁砼为C40砼.桩孔开挖后应尽快灌注护壁砼,宜当天开挖完当天一次性浇筑完毕.灌注砼时宜在孔内抽干水的情况下进行.振捣时不宜使用振动棒,可使用木棒反复插捣来振实砼.护壁模板一般可24小时后拆除,正常情况下是在第二天下节桩孔土方开挖完后进行.拆模后如发现有蜂窝漏水现象,应及时加以堵流或导流,防止桩孔处侧之水夹带泥砂流入孔内。(4)桩孔抽水:挖孔桩成孔作业过程中,要及时抽水.当地下水丰富时,应把整个工程挖孔桩分批进行开挖,且孔位分布均匀,在第一桩开挖时,应选用一二根桩挖得深一些,使其起集水井之用.第二批开挖时,可利用第一批未灌注砼的孔桩进行抽水,以后抽水可以依次类推.孔桩内的水宜连续进行,以免地下水位频繁涨落,否则会加速四周土体颗粒流失,造成护壁外面出现空洞,引起护壁下沉脱节。(5)遇流动性淤泥和流砂时的成孔方法:减少每节的护壁高度,一般用0.30.5M,若遇到流动性淤泥,要视现场情况确定采用=4mm钢护筒或其它有效措施。(6)入岩及扩底石方爆破工程本工程要求桩端全断面进入层(较完整灰岩)不少于一倍桩直径，且扩底成锅底形，石方爆破量较大。拟采用六台空压机，六台01-30型风钻钻眼，岩石硝铵2号炸药爆松石方。考虑本工程的施工特点，周围环境等因素，优先采用松动爆破技术，其作用使岩石从内部破坏到临界面，但破碎了的土石并不产生抛掷运动，而仅在原来的位置附近凸起或有较小的松动现象。其爆破作用指数n=0.40.75，采用岩石硝铵2号炸药，药量按Q=0.33e.q.w3控制，用01-30型风钻成孔，电力起爆，加适当的覆盖措施，确保临近施工区域的安全。爆破施工前根据试爆结果确定炮眼位置及装药量。人工挖孔桩底部应根据设计要求扩底成锅底形，清除泥土及石渣。(7)验底和扩底:当挖至持力层标高时,应及时通知业主、监理、设计单位、勘探单位验底。3.4安放钢筋笼: 人工挖孔后,应根据实测桩长和设计要求制作钢筋笼.钢筋笼在制作、运输和安装过程中,应采取措施防止变形.钢筋笼应用吊车吊放.吊放钢筋笼入孔时,不得碰撞孔壁,灌注砼时要固定钢筋笼位置.若钢筋笼需分段连接时,其连接焊缝及接头量及搭接长度应符合规范要求.钢筋笼安装完毕必须要”验筋”,符合要求后方可浇筑砼。3.5灌注桩身砼每根桩必须一次灌注完,砼离开串筒出口自由下落高度始终要在2m以内。3.6砼试块的制作及养护按同一砼强度等级施工一工作台班切不超过100m3取样一组，砼强度以标准养护28d强度为评定标准。取样要具代表性，应在搅拌后第3盘至结束前30min之间取样。四、主要施工机具计划表施工机械规格单位数量空压机3m3台6风钻台（套）6鼓风机台10搅拌机JDY-350台1振动器HZ-50型台8电焊机BX3-500-2型台6钢筋切断机GJ-40-1台1钢筋弯曲机GJ-40台1钢筋对焊机VN1-100型台1卷扬机5t台1五工程质量管理及保证质量措施5.1工程质量管理措施5.1.1项目质量管理将各过程控制分配至项目各职能部门，明确各部门各岗位职责，制定作业指导书和相应预防措施，按标准化管理模式规范各员工所有工作行为。5.1.2严格按所发布的质量标准及其他有关质量规定进行管理。5.1.3配专职质检员，常驻工地跟班监督检查。5.1.4健全质量责任制，质量验收制度，质量奖惩制度，以工作质量保证工程质量，实行质量一票否决权。5.1.5抓好原材料半成品成品的采购及检验工作，对钢材水泥等材料实行跟踪管理。5.1.6钢材、水泥、砂、石进场后按规定进行现场取样送检：钢筋按同一型号60t为一批；水泥按袋装200t一批、散装500t一批；砂、石按400m3或600t为一批送检。5.2工程质量保证技术措施5.2.1认真组织施工人员进行图纸学习自审和专业图纸会审，进行设计和施工技术交底，全体施工人员对整个工程施工部署施工方法施工要点和应注意事项有一个全面的了解。5.2.2认真做好测量定位工作，建立统一的控制导线网及高程永久性控制桩。5.2.3及时做好隐蔽工程记录。5.2.4进场的原材料，均按规定进行复试，合格后方准使用。5.2.5严格按照施工技术方案组织施工，按质量标准操作。六安全生产体系及保证安全措施6.1安全生产管理目标 杜绝重大设备损坏事故；杜绝人身伤亡事故；不发生重大火灾事故；不发生负主要责任的生产交通事故；不发生重大经济损坏事故；不发生重伤事故；一般事故年频率控制在6以内，严格控制各种习惯性违章。6.2安全生产体系：“安全第一，预防为主”是我公司一贯遵循的安全生产工作总的原则，我司在本工程安全生产管理上实行“公司管理、项目负责、政府监督、群众督查”的管理模式。以工地全面安全管理和安全预测技术管理为手段，层层落实安全生产岗位责任制，建立以项目经理为首的安全生产管理体系，以项目党支部书记为首的安全生产思想工作保证体系，以工会主席为首的群众监督保证体系，以项目总工程师为首的安全生产技术保证体系，以专职安全部门为首的安全管理监督检查体系（详见安全生产管理网络图），强化安全生产达标管理工作，做到“思想到位、组织到位、责任到位”，全面完成各项安全生产管理目标。6.3加强领导、明确职责、全面落实安全生产岗位责任制，项目经理为安全生产的第一责任人，是项目的安全承包人，安全把关人。6.4每个施工人员在各自的职责范围内对安全生产负责，安全管理工作坚持“谁主管谁负责，管生产必须管安全”的原则。6.5加强安全教育，动工前必须进行详细的口头交底和书面交底，并形成文字会签。6.6建立健全的设备管理制度和管理目标责任制，严格制订各种操作规程、安全保障和维护保养制度，采取各种有效的措施，保障机械设备始终处于良好状况，保证施工生产顺利进行。6.7进入施工现场一律佩戴安全帽。加强对施工现场上使用的安全防护用具及机械设备的监督管理，防止因不合格产品流入施工现场而造成伤亡事故。6.8保证安全生产技术措施6.8.1搞好安全技术交底，做好各项安全防护工作。6.8.2对现场操作人员进行安全教育，搞好安全班前班后活动。6.8.3机械操作严格按规章制度进行，严禁违章作业，无证人员严禁操作机械。6.8.4 做好安全检查工作，发现隐患，及时纠正。6.8.5人工挖孔桩内必须设置应急软爬梯，供人员上下井，使用的电葫芦、吊桶等应安全可靠并配有自动卡紧保险装置，不得使用麻绳或脚踏井壁凸缘上下。6.8.6每日开工前必须检测井下的有毒有害气体，并应有足够的安全防护措施。桩孔开挖深度超过10m时，应有专门向井下送风的设备，风量不宜少于25L/S。6.8.7孔口四周必须设置护栏，一般加0.8m高围栏围护。6.8.8挖出的土石方应及时运离孔口，不得堆放在孔口四周1m范围内，机动车辆的通行不得对井壁的安全造成影响。6.8.9施工现场的一切电源、电路的安装和拆除必须由持证电工操作；电器必须严格接地、接零和使用漏电保护器。各孔用电必须分闸，严禁一闸多用。孔上电缆必须架空2.0m以上，严禁拖地和埋压土中，孔内电缆、电线必须有防磨损、防潮、防断得保护措施。照明应采用安全矿灯或12V以下的安全灯。并遵守施工现场临时用电安全技术规范JGJ46的规定。七、施工进度计划及保证措施7.1、施工进度计划7.1.1 2010年1月20日完成挖孔桩施工。7.1.2保证施工进度措施A）该工程实行项目经理负责制，施工时统一安排责任到人，组织充足的人力、物力和财力，保证工程需要。B） 做好施工人员的思想工作，建立奖罚制度，以奖罚作经济杠杆，调节施工人员的工作热情。C） 充分发挥机械化施工优势。g an employment tribunal claimEmployment tribunals sort out disagreements between employers and employees.You may need to make a claim to an employment tribunal if: you dont agree with the disciplinary action your employer has taken against you your employer dismisses you and you think that you have been dismissed unfairly.For more information about dismissal and unfair dismissal, seeDismissal.You can make a claim to an employment tribunal, even if you haventappealedagainst the disciplinary action your employer has taken against you. However, if you win your case, the tribunal may reduce any compensation awarded to you as a result of your failure to appeal.Remember that in most cases you must make an application to an employment tribunal within three months of the date when the event you are complaining about happened. If your application is received after this time limit, the tribunal will not usually accept it.If you are worried about how the time limits apply to you, take advice from one of the organisations listed underFurther help.Employment tribunals are less formal than some other courts, but it is still a legal process and you will need to give evidence under an oath or affirmation.Most people find making a claim to an employment tribunal challenging. If you are thinking about making a claim to an employment tribunal, you should get help straight away from one of the organisations listed underFurther help.If you are being represented by a solicitor at the tribunal, they may ask you to sign an agreement where you pay their fee out of your compensation if you win the case. This is known as adamages-based agreement. In England and Wales, your solicitor cant charge you more than 35% of your compensation if you win the case.If you are thinking about signing up for a damages-based agreement, you should make sure youre clear about the terms of the agreement. It might be best to get advice from an experienced adviser, for example, at a Citizens Advice Bureau. To find your nearest CAB, including those that give advice by e-mail, click onnearest CAB.For more information about making a claim to an employment tribunal, seeEmployment tribunals.The (lack of) air up there Watch mCayman Islands-based Webb, the head of Fifas anti-racism taskforce, is in London for the Football Associations 150th anniversary celebrations and will attend Citys Premier League match at Chelsea on Sunday.I am going to be at the match tomorrow and I have asked to meet Yaya Toure, he told BBC Sport.For me its about how he felt and I would like to speak to him first to find out what his experience was.Uefa hasopened disciplinary proceedings against CSKAfor the racist behaviour of their fans duringCitys 2-1 win.Michel Platini, president of European footballs governing body, has also ordered an immediate investigation into the referees actions.CSKA said they were surprised and disappointed by Toures complaint. In a statement the Russian side added: We found no racist insults from fans of CSKA.Age has reached the end of the beginning of a word. May be guilty in his seems to passing a lot of different life became the appearance of the same day; May be back in the past, to oneself the paranoid weird belief disillusionment, these days, my mind has been very messy, in my mind constantly. Always feel oneself should go to do something, or write something. Twenty years of life trajectory deeply shallow, suddenly feel something, do it.一字开头的年龄已经到了尾声。或许是愧疚于自己似乎把转瞬即逝的很多个不同的日子过成了同一天的样子；或许是追溯过去，对自己那些近乎偏执的怪异信念的醒悟，这些天以来，思绪一直很凌乱，在脑海中不断纠缠。总觉得自己自己似乎应该去做点什么，或者写点什么。二十年的人生轨迹深深浅浅，突然就感觉到有些事情，非做不可了。The end of our life, and can meet many things really do?而穷尽我们的一生，又能遇到多少事情是真正地非做不可？During my childhood, think lucky money and new clothes are necessary for New Year, but as the advance of the age, will be more and more found that those things are optional; Junior high school, thought to have a crush on just means that the real growth, but over the past three years later, his writing of alumni in peace, suddenly found that isnt really grow up, it seems is not so important; Then in high school, think dont want to give vent to out your inner voice can be in the high school children of the feelings in a period, but was eventually infarction when graduation party in the throat, later again stood on the pitch he has sweat profusely, looked at his thrown a basketball hoops, suddenly found himself has already cant remember his appearance.童年时，觉得压岁钱和新衣服是过年必备，但是随着年龄的推进，会越来越发现，那些东西根本就可有可无；初中时，以为要有一场暗恋才意味着真正的成长，但三年过去后，自己心平气和的写同学录的时候，突然就发现是不是真正的成长了，好像并没有那么重要了；然后到了高中，觉得非要吐露出自己的心声才能为高中生涯里的懵懂情愫划上一个句点，但毕业晚会的时候最终还是被梗塞在了咽喉，后来再次站在他曾经挥汗如雨的球场，看着他投过篮球的球框时，突然间发现自己已经想不起他的容颜。Originally, this world, can produce a chemical reaction to an event, in addition to resolutely, have to do, and time.原来，这个世界上，对某个事件能产生化学反应的，除了非做不可的坚决，还有，时间。A persons time, your ideas are always special to clear. Want, want, line is clear, as if nothing could shake his. Also once seemed to be determined to do something, but more often is he backed out at last. Dislike his cowardice, finally found that there are a lot of love, there are a lot of miss, like shadow really have been doomed. Those who do, just green years oneself give oneself an arm injection, or is a self-righteous spiritual.一个人的时候，自己的想法总是特别地清晰。想要的，不想要的，界限明确，好像没有什么可以撼动自己。也曾经好像已经下定了决心去做某件事，但更多的时候是最后又打起了退堂鼓。嫌恶过自己的怯懦，最终却发现有很多缘分，有很多错过，好像冥冥之中真的已经注定。那些曾经所谓的非做不可，只是青葱年华里自己给自己注射的一支强心剂，或者说，是自以为是的精神寄托罢了。At the moment, the sky is dark, the air is fresh factor after just rained. Suddenly thought of blue plaid shirt; Those were broken into various shapes of stationery; From the corner at the beginning of deep friendship; Have declared the end of the encounter that havent start planning. Those years, those days of do, finally, like youth, will end in our life.此刻，天空是阴暗的，空气里有着刚下过雨之后的清新因子。突然想到那件蓝格子衬衫；那些被折成各种各样形状的信纸；那段从街角深巷伊始的友谊；还有那场还没有开始就宣告了终结的邂逅计划那些年那些天的非做不可，终于和青春一样，都将在我们的人生中谢幕。Baumgartner the disappointing news: Mission aborted. r plays an important role in this mission. Starting at the ground, conditions have to be very calm - winds less than 2 mph, with no precipitation or humidity and limited cloud cover. The balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our day-to-day weather lives. It will climb higher than the tip of Mount Everest (5.5 miles/8.85 kilometers), drifting even higher than the cruising altitude of commercial airliners (5.6 miles/9.17 kilometers) and into the stratosphere. As he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence.The supersonic descent could happen as early as Sunda.The weatheThe balloon will slowly drift to the edge of space at 120,000 feet ( Then, I would assume, he will slowly step out o