桥梁、涵洞施工方案.doc
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1、jako produkn systm zastavit pravidelnou drbu cyklu, jmenovit: kadch 40 dn, nebo tak pro systm vroby cel rostliny 1-2 pracovn zastavit drba pravideln. III denn drba a pravideln drby, drby aktivity jsou nebezpe konkrtn clen prci analza, vvoj vhodn kontroln opaten, podat o pracovn povolen, po proveden
2、etzce schvlen; 2, plny drby a programy ze zazen na spolenosti ron plny komplexn drby, pln by ml zahrnovat bezpenostn vybaven projektant a bezpenostnch zazen opravit projekt podrobn oddlen. Rutinn plnovan drby, jednotka plnem, vrobn technologie sekci ke schvlen. Pln drby mus bt pt sad, kter bude revi
3、ze programu, pracovnky drby, bezpenost, principy konstantn, konstantn kvalita plnu drby opravy. Podle poadavk projektu drby zazen drba stavebnch zazen drby programu by mly bt vytvoeny, program drby by ml bt vyeten pouitho zazen. Programy drby by mla bt bezpenostn opaten, a Jasn kontrola projekt bezp
4、enostn manaer. drba stavitel by mly urit osobu odpovdnou za cel konkrtn bezpenost pi drb. 3, stavitel vnj stavebn dr by ml mt odpovdajc kvalifikaci stanovenou sttem a to v rozsahu jejich licence k provdn oprav a stavebn firmy. Kdy podepsat smlouvu o drb a podepsal dohodu o bezpenosti. Konkrtn od fir
5、my ke spoluprci prmyslu, stavebnictv, implementace systmu zen bezpenosti dodavatele. 4-Ped drbou, opravami bval bezpenostn vzdlvn, jednotky k asti v drb zazen bezpenosti vzdlvn, bezpenostn vzdlvn pat nsledujc: jsem drb bezpenostn pravidla a pedpisy. II drdifficult, not hating; blueprints, not rhetor
6、ic; words and simple, but full of love, truth, passion, entrepreneurial passion. Take this opportunity, my inspirational quotes Li Dazhaos classic iron specialise in uplifting blend with the article gave everyone, with a view on how to do well under the new situation of township and village leaders
7、inspire and help, and also share with you. A good play to create iron shoulders strong arms, to assume the burden be passed; only specific qualities, will it be possible in specific areas to create a world. In my view, village chiefs in the new situation, we must first have five basic quality. One a
8、mbition is to pioneer. Who is handsome. People only high-minded can stimulate the flow of momentum to become brave and persistent, become quiet and powerful. Township and village party leaders, within their respective jurisdictions, political stability and economic and social development issues, dec
9、isions and orientation depends to a large extent because of your. Everybody in village chiefs and the positions, both the trust of the masses, the Organizations trust, more ability to you, fully affirmed the moral and other qualities. Therefore, we must always maintain the historical mission and soc
10、ial responsibility, and our ideal tree rooted in the hard work of the soil, with indomitable spirit, indomitable courage to open up a new situation of villages and towns. To have a feeling of closeness to the second. The people and country. Our business foundation in the peoples blood in the people
11、power people. Advanced decisions of the party cadres to the feelings of the people is an eternal theme. Fan Zhong-yan, called first, and enjoy comfort about others, Zheng Banqiaos also wrote a Ya Chai lay listening to the rustling of bamboo, the suspect is suffering. Cao County officials, little my,
12、 a total turn off. Old of feudal official even has so feelings, alone we is to serving for purposes of people servant does? we more should always hold with on people of deep feelings, heart Department masses of leading visited tea, care masses of emotions thoughts complained, always insisted put mas
13、ses of interests put in first, consciously from itself do up, from small do up, from masses most care, and most directly, and most reality of interests problem grabbed, real do love for people by Department, and right for people by with, and Lee for people by conspiracy to. Three with the fame of mi
14、nd. Non-indifferent not insist your dream, without serenity not go far. Ascension to fame is morality, is the sublimation of the soul. As Township and village, be sure to maintain a normal state of mind, establish a correct viewpoint on power, position and values and Outlook, as fame is light like w
15、ater, depending . 50 km, also red and like hundreds of thousands of the KMT military combat, but he went on to collect a variety of newspapers and magazines, and then race against time to pore over. As long as the study of mind, it is not necessary to come to the library, workshops, into the village
16、s, people learned farming techniques, problem-solving methods, participation in桥涵和涵洞工程桥梁施工方案采用钻孔桩基础,根据地质条件可分别采用回旋钻或冲击钻钻孔,钢筋笼现场绑扎,汽车吊吊沉钢筋笼。柱式墩模板采用整体式钢模,一次浇筑成型;肋板式台、薄壁墩等的模板采用大块钢模板,龙骨采用型钢加劲,并采用对拉螺栓固定,外用脚手架支撑,确保墩台施工时所必须的强度、刚度和稳定性。台帽及盖梁的模板采用定型钢模板,钢筋均在加工场加工后运至现场绑扎,混凝土统一由拌合站拌制,砼运输车运输。现浇箱梁混凝土采用拌和站集中拌和,混凝土运输
17、车运输至现场,砼泵送入模。预制梁板由预制场统一预制、统一安装,预制箱梁、T梁采用用架桥机进行架设,预制空心板采用汽车起重机架设。特大桥现浇连续钢构采用挂蓝悬浇施工。涵洞工程基坑采用人工配合挖掘机开挖,混凝土采用拌和站集中拌和,混凝土运输车运输至现场。墙身模板采用定型大块钢模板,钢筋集中加工,现场绑扎成型。混凝土浇筑采用汽车吊配吊斗入模,机械振捣密实。施工方法1、钻孔桩施工对于河流中的桩基础一般采用围堰筑岛的方案施工。桩基础施工技术要点如下:、埋设护筒护筒用厚5mm的钢板制作,其内径大于钻头直径200-400mm。护筒的埋设深度不小于1.5m2.0m,并高出施工地面0.3m,埋设准确、稳定。、钻
18、机定位钻机中心对准桩中心,钻机定位后,底座必须平整、稳固,确保在钻进中不发生倾斜和位移。、泥浆制备采用自然造浆方式进行护壁。针对不同地层的地质特性,根据以往施工经验配制调整泥浆,并在施工中定期检查浆液的比重、粘度、静切力、酸碱度、胶体率、失水率等指标。泥浆循环使用,废弃泥浆经沉淀处理后外运,以保护环境。、钻孔钻孔开始时,开动泥浆泵进行循环,待泥浆均匀后以慢速开始钻进,使护筒脚处有牢固的泥皮护壁,钻至护筒脚下1.0m后,按正常速度钻进。、清碴清碴采用泥浆循环的方式进行。、第一次清孔清孔的目的是使孔底沉碴(虚土)、泥浆浓度、泥浆中含钻碴量符合质量要求和设计要求,为在泥浆中灌注混凝土创造良好的条件,
19、当钻孔达到设计深度后即停止钻进,此时提起钻头,边清碴边补充泥浆。灌注砼前,孔底沉淀厚度符合图纸要求。、吊放钢筋笼吊放钢筋笼采用吊车进行。钢筋笼长度大于20米时应分段绑扎,焊接时,先将下段挂在孔口,再吊上第二段进行搭接焊接,逐段焊接逐段下放。、导管安装导管用250mm的钢管,壁厚5mm,每节长3.05.0m,配12节长1.01.5m短管,由管端粗丝扣、法兰螺栓连接,接头处用橡胶圈密封防水。、第二次清孔安放钢筋笼及导管就绪后,再利用导管进行第二次清孔。清孔的方法是在导管顶部安装一个弯头和皮笼,用泵将泥浆压入导管内,再从孔底沿着导管外置换沉碴。复测沉碴厚度在规范要求范围以内,立即浇筑水下砼。、灌注水
20、下砼砼在拌和站集中拌和,混凝土运输车运输,浇筑用汽车起重机安拆导管,提升料斗。首批砼数量要经过计算,开导管用砼隔水栓。在整个浇筑过程中,导管在砼埋深46m。浇筑完成时桩顶混凝土设计高程比设计高程高出0.5-1m.、检测钻孔桩内混凝土达到一定强度后破桩头,采用声测方法进行检验,发现问题根据情况做出妥善处理。2、承台、系梁施工对于水中承台一般采用围堰筑岛的方案施工钢套箱施工工艺如下:(1)、钢套箱制作钢套箱委托专业制作厂家设计制作,制作完成后于现场交货。(2)、整体吊装下沉先在栈桥上搭设拼装平台,拼装完并将顶部部分支撑安装好后,采用2台50t的吊机起吊就位。(3)、堵漏封底和抽水堵漏在钢套箱顶面布
21、置和安装导管和漏斗,采用与灌注钻孔桩水下砼相同的工艺浇注水下C40封底砼。(4)、抽水堵漏封底砼强度达到设计强度(试件试压)时,用水泵抽水,对个别板缝渗水可在套箱内用棉絮塞填堵漏。(5)、钢套箱拆除墩身完成后,进行钢套箱拆除。先将钢套箱四周砂砾开挖出来,再由潜水员拆除拼接缝处连接螺栓,用起重机取出钢模,逐边逐边取出。承台、系梁施工工艺如下:、基础开挖先初步放样,划出系梁和承台边界,用机械配合人工开挖,人工清理四周及基底。对基底进行夯实,然后按图铺设砼垫层。、测量放样下部承台、系梁开工前,进行准确中线放样,并在纵横轴线上引出控制桩,控制钢筋绑扎和模板调整,严格控制好顶面标高。、钢筋下料成型及绑扎
22、钢筋在钢筋加工场地集中下料成型,编号堆放,运输至作业现场,进行绑扎。钢筋绑扎严格按图纸进行现场放样绑扎,绑扎中注意钢筋位置、搭接长度及接头的错开。钢筋绑扎成型后,按要求进行验收。、支立模板承台和系梁模板均采用大块钢模拼装,用槽钢或角铁做肋。底口、中部、上部均用20对拉螺杆,外侧用方木支撑固定。模板拼装时严格按照设计图纸尺寸作业,垂直度、轴线偏差、标高均应满足技术规范规定。、浇注砼钢筋、模板经监理工程师检查合格后,开始浇注砼。砼采取集中拌合,砼运输车运输。拌合中严格控制材料计量,并对拌合出的砼进行坍落度测定。承台、系梁砼均采用吊车配吊斗浇注。浇注中控制好每层浇注厚度,防止漏振和过振,保证砼密实度
23、。砼浇注要连续进行,中间因故间断不能超过前层砼的初凝时间,砼浇注到顶面,应按要求修整、抹平。 养生砼浇注后要及时覆盖养生,经常保持砼表面湿润。3、墩台身施工、模板工程模板的选择墩柱模板采用整体式定型钢模,模板委托专业厂家制作。薄壁墩、肋板式桥台等模板选购大块定型钢模。模板及脚手架安装圆柱施工时根据柱高选择模板在现场拼装,拼装成节后由吊车吊起安装,通过风缆固定。为防止露浆,模板接缝处夹胶条或海绵条止浆。脚手架的立面、平面均应安装牢固,并能抵挡振动时偶然撞击。支架立柱应在两个互相垂直的方向加以固定,支架支承部分必须安置在可靠的地基上。薄壁墩、肋板式桥台模板采用大块钢模板,由吊车吊起安装,龙骨采用型
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