x东凤互通高架桥现浇箱梁施工方案

romoting the construction of rule of law, but also the most basic development environment. Despite my good social order in General, but there are law-abiding consciousness, social order is not standard, regardless of faith, Twining visit visit and other outstanding problems. We want to actively promote the field of multi-level governance according to law, promote the continuous improvement of the social environment. To promote universal compliance. Actively foster the rule of law culture, carry out law publicity and education on honesty and trustworthiness, guide the masses and consciously abide by the law, failing to find method, problem-solving method, method of gradually changing the world, he is not looking for but someone unspoken rules, formed all law law, abide by the good atmosphere. To strengthen the comprehensive management of public security. Deepening peace xingan construction, strongly against violence crime, mafia and serious criminal offences, to protect the legitimate rights and interests of citizens, legal persons, carry out criminal policy of temper justice with mercy, the maximum stimulating social vitality, and earnestly safeguard social harmony and stability. To resolve social conflicts by law. To further smooth channels of reporting social conditions and public opinion, improving regulation, arbitration, as wellrelationship between Government and business. The two sessions, General Secretary of Pro, clear the word succinctly summarized the new relationship between Government and business, as pure politics, reshaping the political relationship specified in the direction. District leaders in handling political and business relations, engage in trading power for money, and finally stumbled, we a lesson, always keep in mind that Pro, clean practicing Pro, clear. Pro is to open a sincere engagement with private enterprise to help solve practical difficulties; Clear is to clarify the Division of power, exercised in accordance with, private entrepreneurs with innocent purity, not abusing power for personal gain, not to engage in trading power for money. Third, in order to maintain fairness and justice. Fairness and justice is the lifeline of the rule of law, is the best development environment. Currently, lax law enforcement and the judicial sector in our region also exist to varying degrees, law enforcement departments and individual window units power for personal gains and bribes, thick friends, relations, human cases, money cases in which seriously infringe on the legitimate rights and interests of enterprises and people. Especially some law enforcement and inspection for profit purposes, deliberately looking for corporate loopholes, found directly under the ticket does not give business improvement opportunities. We recruit a company doesnt easily, cultivating a business more difficult, never for personal gain, systematic harassment, card, last checked to check to get the enterprise collapsed. To guarantee the legitimate rights and interests. Always proceed from the overall situation of reform and development of services, fully consider the characteristics of production and management in non-public enterprises and social benefits, an accurate grasp of legal limits, protect the enthusiasm of entrepreneurs and practitioners in innovation and entrepreneurship, enhancing expectations and confidence. To promote strict enforcement. Strengthening law enforcement procedures, improve law enforcement performance evaluation, strengthening the supervision of law enforcement, exploration and practice of risk control mechanism of law enforcement to further standardize the social security, urban management, road traffic administrative law enforcement, effectively free, extensive law-enforcement and lax enforcement of law enforcement and other issues. To uphold justice. Justice is the last line of Defense to safeguard fairness and justice, to unequivocally support the courts and procuratorates independently exercise level . Judicial activities were rampant, must not be allowed to run, favors, money, must not be allowed to knowingly violate the miscarriage, violations of the legitimate rights and interests of the masses must not be allowed to abuse of power, to make forest mass can be felt in every judicial cases in equity and justice. Four to deepen grass-roots governance according to lawchain do long, and put scale big. To serve the development of enterprises. Duocuo simultaneously improving service efficiency, build better public services platform, enhance work efficiency, initiative to help businesses solve the project procedures, financing loans, issues such as land-use approval, reduce operating costs, business travel light and enhance the confidence to overcome all kinds of difficulties and the Foundation, real entrepreneurial passion play entrepreneurship, enhance the internal vitality and creativity. SI XING an construction, promoting the rule of law, tries to make the transformation of forest development XI General Secretary stressed, to reinvigorate Northeast China, optimized development environment is very important. Environment of rule of law most gather Moss, the most conducive to development. Improving the leading cadres using the method of thought and the rule of law Administration work, problem-solving, the ability to promote the development, is the key to promoting the rule of law. The law may affect the efficiency of out of the path of development will be more smooth, won development gains will be sustained, and end with greater efficiency. Leading cadres at all levels should take the lead in respect of law law, abide by, and actively foster Socialist culture, actively promoting the field of multi-level governance according to law, guide the masses and consciously abide by the law, failing to find law, solve the problem by law, in accordance with the law prevail. XXX administration by law of leading cadres do not exist on the rule of law, law enforcement, casual, and vow not to investors, the new scores and other turmoil. These important expositions on my district create good development environment with highly targeted and guidance, especially the General Secretary pointed out that the chaos in my area also exists to varying degrees, some even quite serious. Leading cadres at all levels must improve the development environment of rule of law as a fundamental task, adhere to the problem oriented, solid and solve the problems in the construction of rule of law, to rule the new effect for development environment improvements. To hold key minority. Leaders of this group, although few in number, but the effect is critical. If a local leaders take the lead right according to law, in accordance with the law, the local CPPCC fresh, pragmatic and efficient development environment. Conversely, if a local leaders of ignoring the law, impunity, not only the political environment will be destroyed, will have serious implications for the development environment. Now, some leading cadres lack of awareness on the importance of learning, that learn or not does not matter. Think efficiency is too low too much, act according to the procedure, than an executive order getting along with. In dealing with complex issues, often speak of settling and done; on the issue of handling letters and visits, like to spend money and buy stop and stable, but disregard the law administration, in accordance with the law, the rulechain do long, and put scale big. To serve the development of enterprises. Duocuo simultaneously improving service efficiency, build better public services platform, enhance work efficiency, initiative to help businesses solve the project procedures, financing loans, issues such as land-use approval, reduce operating costs, business travel light and enhance the confidence to overcome all kinds of difficulties and the Foundation, real entrepreneurial passion play entrepreneurship, enhance the internal vitality and creativity. SI XING an construction, promoting the rule of law, tries to make the transformation of forest development XI General Secretary stressed, to reinvigorate Northeast China, optimized development environment is very important. Environment of rule of law most gather Moss, the most conducive to development. Improving the leading cadres using the method of thought and the rule of law Administration work, problem-solving, the ability to promote the development, is the key to promoting the rule of law. The law may affect the efficiency of out of the path of development will be more smooth, won development gains will be sustained, and end with greater efficiency. Leading cadres at all levels should take the lead in respect of law law, abide by, and actively foster Socialist culture, actively promoting the field of multi-level governance according to law, guide the masses and consciously abide by the law, failing to find law, solve the problem by law, in accordance with the law prevail. XXX administration by law of leading cadres do not exist on the rule of law, law enforcement, casual, and vow not to investors, the new scores and other turmoil. These important expositions on my district create good development environment with highly targeted and guidance, especially the General Secretary pointed out that the chaos in my area also exists to varying degrees, some even quite serious. Leading cadres at all levels must improve the development environment of rule of law as a fundamental task, adhere to the problem oriented, solid and solve the problems in the construction of rule of law, to rule the new effect for development environment improvements. To hold key minority. Leaders of this group, although few in number, but the effect is critical. If a local leaders take the lead right according to law, in accordance with the law, the local CPPCC fresh, pragmatic and efficient development environment. Conversely, if a local leaders of ignoring the law, impunity, not only the political environment will be destroyed, will have serious implications for the development environment. Now, some leading cadres lack of awareness on the importance of learning, that learn or not does not matter. Think efficiency is too low too much, act according to the procedure, than an executive order getting along with. In dealing with complex issues, often speak of settling and done; on the issue of handling letters and visits, like to spend money and buy stop and stable, but disregard the law administration, in accordance with the law, the rule东凤互通高架桥现浇箱梁施工方案一、编制依据1、东凤互通高架桥工程施工图纸。2、业主对工程质量、工期的要求。3、现行工程质量规范、标准。4、现场实际情况。5、我公司从事类似工程的施工经验及我公司的资源情况。二、编制原则1、严格执行国家的政策、法令、法规和广东省有关政策、办法。2、严格执行国家现行技术规范、操作规程和质量检验评定标准。3、满足设计图纸对施工组织设计的具体要求。1）施工方案科学、合理、施工方法切实可行，措施可靠，满足总工期的要求。2）施工机械设备配套齐全，搭配合理，准备充足，满足施工方案及工艺要求。3）项目机构设置合理，专业技术管理人员数量和资历满足需要。4）劳动力安排和主要材料供应计划满足施工方案和进度要求。5）保证安全、质量、工期、文明施工，环境保护的技术措施切实可行。三、编制范围东凤互通高架桥现浇箱梁工程。四、工程概况东凤互通高架桥左幅第九联现浇连续箱梁（403540）m采用单箱三室直腹板箱形等高截面，梁高2.2m，箱梁顶板宽16.520.327m，底板宽1215.824m，腹板厚0.65m，顶板厚0.25m，底板厚0.22m，悬臂长2.25m，在支点处设置横隔梁。中横梁厚度为2m，端横梁的厚度为1.5m；右幅第十六联现浇连续箱梁（2929.529）m采用单箱五室直腹板箱形等高截面，梁高1.8m，箱梁顶板宽30.65921.066m，底板宽26.10616.565m，腹板厚0.65m，顶板厚0.25m，底板厚0.22m，悬臂长2.25m，在支点处设置横隔梁。中横梁厚度为2m，端横梁的厚度为1.5m；箱梁采用C50混凝土。五、施工方案本桥左幅第九联和右幅第十六联现浇连续箱梁采用满堂支架法进行施工，对于跨公路地段则采用工字钢搭设宽4.5m，高5m的门洞（具体详见现浇箱梁支架布置示意图）。外模采用竹胶板拼装，内模采用木模。箱梁砼浇筑采用二次浇筑法，第一次浇筑至腹板与翼缘板连接处，第二次浇筑顶板，待箱梁砼强度达到85以上时才能进行预应力张拉。（施工工艺框图见下页）（一）、碗扣式脚手架满堂支架1、地基处理施工前应检验原地基土的承载力，根据施工荷载进行地基承载力验算（确定是否设灰土垫层），决定地基处理方案。首先平整施工场地，清除地表杂土。根据施工需要，采用压路机碾压密实后,用20cm厚C20素混凝土对基础地面进行固结硬化处理，保证支架基础具有一定的承载能力和抗沉陷能力。基底应保证顶面平整，预留排水沟，确保不积水。2、满堂支架搭设（1）测量放样根据控制点采用全站仪放出单幅箱梁在地基上的纵向中线，技术人员依箱梁内模拆除，安装预应力束测量、调整立模标高底板预应力管道安装地基处理场地硬化支架搭设安装侧模安装底板及腹板钢筋、腹板模板安装顶板内模、翼板模板安装顶板及翼缘板钢筋浇筑顶板、翼板混凝土测量定位安装底模支架预压安装支座预留顶板天窗砼养护预应力束张拉、锚固预应力孔道压浆、封锚支架落拆及外模拆除预留天窗封顶、清理桥面、进行下道工序浇筑底板、腹板混凝土现浇箱梁施工工艺框图据中线向两侧对称布设碗扣支架。碗扣满堂支架下垫15cm15cm方木或者枕木，使立杆处于枕木或方木中心，保证枕木或方木底部平整牢固。（2）碗扣支架安装根据立杆及横杆的设计组合，从底部向顶部依次安装立杆和横杆。立杆采用对接扣件，顺桥向和横桥向均按60厘米布设，横杆按层距120厘米布设。安装时应保证底部立杆牢固，一般先安装底部的横杆和一层立杆，等支架大致稳定后再逐层往上安装，同时安装全部立杆和横杆后，采用6米普通钢管通过扣件与碗扣支架连接当做斜撑杆（剪刀撑），斜撑杆底部必须支撑在地基基础上，保证支架的稳定性。（3）顶托安装根据梁底设计标高预留好方木和底模的高度后确定搭设碗扣支架的高度，然后再安装顶托。在地面上大致调好顶托伸出量，再运至支架顶安装。根据梁底高程变化决定桥横向和纵向控制断面间距，桥横向按照在梁底设立左、中和右三个控制点的同时在桥梁最外侧左右各加一个控制点。对于桥面加宽段则每隔5米设立桥梁标高控制点。对于沿桥的纵向，由于桥面底部高程变化，拟每隔2米设立桥梁标高控制点。调整好控制点后，调整好顶托的标高，顶托伸出量一般控制在30cm以内。（4）纵横梁安装顶托标高调整完毕后，在其上安放10*10cm的方木纵梁，在纵梁上间距60cm安放10*10cm方木横梁，横梁长度随桥梁宽度而定，至少比顶板一边各宽出50cm，以支撑外模支架及检查人员行走。安装纵横方木时，应注意横向方木的接头位置与纵向方木的接头错开，且在任何相邻两根横向方木接头不在同一截面上。3、支架预压为减少支架变形及地基沉降对现浇箱梁线性的影响，在纵横梁安装完毕后进行支架预压。预压采用砂袋，预压范围为箱梁底部，重量不小于箱梁总重的1.2倍。因悬臂板本身重量较轻，可根据实测的预压结果，对悬臂板模板的预拱度作相应的调整。1）、加载顺序：分三级加载，第一、二次分别加载总重的30，第三次加载总重的40。加载顺序和砼浇筑顺序一致，从跨中向桥墩处对称进行。2）、预压观测：观测位置设在每跨的L/2，L/4处及墩与梁剪切处，每组分左、中、右三个点。在点位处固定沉降板观测杆，以便于沉降观测。采用水准仪进行沉降观测，布设好观测杆后，加载前测定出其杆顶标高。沉降观测过程中，每一次观测均找测量监理工程师抽检，并将观测结果报监理工程师认可同意。第一次加载后，每2个小时观测一次，连续两次观测沉降量不超过3mm，且沉降量为零时，进行第二次加载，按此步骤，直至第三次加载完毕。第三次加载沉降稳定后，经监理工程师同意，可进行卸载。3）、卸载：人工配合吊车吊运砂袋均匀卸载，卸载的同时继续观测。卸载完成后记录好观测值以便计算支架及地基综合变形。根据观测记录，整理出预压沉降结果，调整碗扣支架顶托的标高来控制箱梁底板及悬臂的预拱高度。4、模板安装（1）、底模板底模板采用1.5cm厚高强度竹胶板，模板安装前涂刷脱模剂。底板横坡按设计图纸规定的横坡，横向宽度要大于梁底宽度，梁底两侧模板各超出梁底边线不小于5cm，以利于在底模上支立侧模。模板之间连接部位采用海绵胶条以防止漏浆，模板之间的错台不超过1mm。模板拼接缝要纵横成线，避免出现错缝现象。底模板铺设完毕后，进行平面放样，全面测量底板纵横向标高，纵横向间隔5m检测一点，根据测量结果将底模板调整到设计标高。底板标高调整完毕后，再次检测标高，若标高不符合要求，进行二次调整。（2）、侧模板和翼缘板模板侧模板和翼缘板模板采用1.5cm厚高强度竹胶板，根据测量放样定出箱梁底板边缘线，在底模板上弹上墨线，然后安装侧模板。侧模板与底模板接缝处粘贴海绵胶条防止漏浆。在侧模板外侧背设纵横方木背肋，用钢管及扣件与支架连接，用以支撑固定侧模板。翼缘板底模板安装与箱梁底板模板安装相同，外侧挡板安装与侧模板安装相同。挡板模板安装完毕后，全面检测标高和线型，确保翼缘板线型美观。（3）、箱室模板由于箱梁混凝土分两次浇筑，箱室模板分两次安装。第一次用木模板做内模板，用方木做横撑，同时用定位筋进行定位固定，并拉通线校正木模板的位置和整体线型。当第一次混凝土达到一定强度后拆除内模，再用方木搭设小排架，在排架上铺设2cm厚的模板，然后在模板上铺一层油毛毡，油毛毡接头相互搭接5cm，用一排铁钉钉牢，防止漏浆。在浇注砼过程中派专人检查内模的位置变化情况。为方便内模的拆除，在每孔的设计位置布设人孔。5、钢筋加工安装（1）、钢筋安装顺序1）安装绑扎箱梁底板下层钢筋网；2）安装腹板钢筋骨架和钢筋；3）安装横隔板钢筋骨架和钢筋；4）安装和绑扎箱梁底板上层钢筋网及侧角钢筋；5）第一次浇筑混凝土，达到三天强度以后，安装和绑扎顶板上下层钢筋网、侧角钢筋和护栏、伸缩缝等预埋件。（2）、钢筋加工及安装钢筋加工时，应按照设计要求尺寸进行下料、成型，钢筋安装时控制好间距、位置及数量。要求绑扎的要绑扎牢固，要求焊接的钢筋，可事先焊接的应提前成批次焊接，以提高效率。焊缝长度、饱满度等方面应满足规范要求。钢筋加工应注意以下事项:a、钢筋在场内必须按不同钢种、等级、规格、牌号及生产厂家分别挂牌堆放。钢筋存放采用下垫上盖的方式避免钢筋受潮生锈。b、钢筋在加工场内集中制作后运至现场安装。c、钢筋保护层采用提前预制与主梁等标号的砼垫块，砼保护层的厚度要求符合设计要求。d、在钢筋安装过程中，及时对设计的预留孔道及预埋件进行设置，设计位置要正确、固定牢固。e、钢筋骨架焊接采用分层调焊法，即从骨架中心向两端对称、错开焊接，先焊骨架下部，后焊接骨架上部。钢筋焊接要调整好电焊机的电流量，防止电流量过大或操作不当造成咬筋现象。钢筋焊接优先采用双面焊，当双面焊不具备施工条件时，采用单面焊接。钢筋焊接完毕后，将焊渣全部敲除掉。钢筋焊接完成自检合格后，报请监理工程师检验合格后，方可进行下道工序施工。f、钢筋安装位置与预应力管道或锚件位置冲突时，应适当调整钢筋位置，确保预应力构件位置符合设计要求。焊接钢筋时应避免钢绞线和金属波纹管道被电焊烧伤，防止造成张拉断裂和管道被混凝土堵塞而无法进行压浆。钢筋加工安装完毕，经自检合格报请监理工程师抽检合格后，方可进行下道工序施工。6、混凝土浇筑混凝土由拌合站集中拌和，混凝土采用4台罐车运送，现场采用1台泵车浇注混凝土， 1台泵车备用。箱梁混凝土分两次浇注，第一次浇注底板和腹板，浇筑至肋板顶部，第二次浇筑顶板和翼板，两次浇筑接缝按施工缝处理。混凝土浇筑从一端向另一端呈梯状分层连续浇筑，上层与下层前后浇筑距离保持2m左右，在下层混凝土初凝前浇筑完成上层混凝土。浇筑应从跨中向桥墩对称进行，使应该发生的支架变形及早完成。混凝土浇筑应注意以下事项：a、混凝土浇筑前，用人工及吹风机将模板内杂物清除干净，对支架、模板、钢筋和预埋件进行全面检查，同时对吊车、电路、振捣棒等机械设备进行检查，确保万无一失。b、混凝土浇筑纵向应从跨中对称于桥墩向桥墩方向浇筑，横向应对称纵向中心线，先中心，后两侧对称浇筑。混凝土分层厚度为30cm，浇筑过程中，随时检查混凝土的坍落度。c、混凝土振捣采用插入式振捣棒，移动间距不应超过振捣棒作用半径的1.5倍，作用半径约为振捣棒半径的89倍。d、振捣棒振捣时与侧模保持510cm的距离，避免振捣棒接触模板和预应力管道等。振捣上层混凝土时，振捣棒要插入下层混凝土10cm左右。对每一振动部位振捣至混凝土停止下沉，不再冒气泡。表面平坦、泛浆为止，避免漏振或过振，每一处振完后应徐徐提出振动棒。e、在混凝土浇筑过程中安排专人跟踪检查支架和模板的情况，模板若出现漏浆现象，要用海绵条进行填塞。在浇筑混凝土前，在L/2，L/4截面位置的底模板下挂垂线，每截面分左边、左中、中线、右中、右边设五道垂线。垂线下系钢筋棍，在地面对应位置埋设钢筋棍，在两根钢筋棍交错位置划上标记线，以此来观测混凝土浇筑过程中底板沉降情况，若发生异常情况，立即停止浇筑混凝土，查明原因后再继续施工。f、第一次浇筑混凝土，浇筑至腹板顶部时，做好施工缝。混凝土高度略高出设计腹板顶部1cm左右，将顶面的水泥浆和松散砼凿除掉，露出坚硬的混凝土粗糙面，用水冲洗干净。g、第二次浇筑箱梁顶板混凝土时，在L/2，L/4和桥墩和梁相切截面处，从内侧向外侧间距2m布设钢筋棍，将钢筋棍焊在顶层钢筋上，使顶端标高为顶板标高，以此办法来控制顶板砼浇筑标高及横坡度。用提浆棍滚压，使其表面出浆，便于抹面。提浆棍滚压后，紧跟着人工抹面，抹面时要架设木板，不得踩砼面，以免影响平整度。待抹面后半小时左右，采用抹光机再次进行抹面平整，最后再人工进行收浆抹面。混凝土收浆抹面后进行人工拉毛，采用钢丝刷横向拉毛，深度在12mm。要掌握好拉毛时间，早了带浆严重，影响平整度，晚了则拉毛深度不够，一般评经验掌握，在砼表面用手指压时有轻微硬感时拉毛为宜。分两次进行抹面。第一次抹面对混凝土进行找平，在混凝土接近终凝、表面无泌水时，进行第二次抹面收光。然后横向进行拉毛处理。h、在浇筑箱梁顶板预留孔混凝土前，应清除箱内杂物，避免堵塞底板排水孔。主梁顶面留孔四壁凿毛，填筑预留孔混凝土要振捣密实。i、混凝土养生采用土工布覆盖撒水养生，保证混凝土表面始终处于湿润状态，养生时间不少于7天。用于控制张拉、落架的混凝土强度试块放置在箱梁室内，同条件进行养生期内。桥面严禁堆放材料。7、预应力工程预应力工程作为现浇箱梁的重中之重，从预留孔道的布设、锚垫板的安装、锚下砼的振捣以及张拉和压浆操作均不容忽视。一旦某一环节出现问题，就会造成质量问题。预应力工程分孔道成型、下料编束、穿索、张拉和压浆五个步骤：1、孔道成型预应力管道成型采用金属波纹管，金属波纹管在使用前要逐根检查，不得使用有锈包裹及沾有油污、泥土或有撞击、压痕、裂口的波纹管。金属波纹管在安放时，根据管道坐标值，按设计图纸要求设置定位筋，并用绑丝绑扎牢固，曲线部分采用u型定位环与定位筋绑扎，卡牢波纹管。在波纹管接头部位及其与锚垫板喇叭接头处，用宽胶带粘绕紧密，保证其密封，不漏浆。锚头安装时，应使锚头入槽，不得随意放置。限位板安装过程中注意钢绞线与孔洞一一对应，防止错位，造成张拉过程中钢绞线断丝，限位板槽的深浅合适，防止过浅钢绞线刻痕厉害，过深造成夹片外露较长或错位。2、下料编束首先检查钢绞线质量是否符合设计要求，保证钢绞线表面无裂纹毛刺，机械损伤，氧化铁皮或油迹。钢绞线下料长度经计算确定，L=（两锚头间的设计长度）+2（锚具厚度+限位板厚度+千斤顶长度+预留长度）。钢绞线切割用砂轮机切割后编成束，编束时保持每根钢绞线之间平行，不缠绕，每隔11.5m绑扎一道铅丝，铅丝扣向里，绑好的钢绞线束编号挂牌堆放，离开地面，以保持干燥，并遮盖防止雨淋。3、穿束箱梁钢绞线采用钢套牵引法，穿束时钢绞线头缠胶带，防止钢绞线头被挂住。4、张拉b、设备的校验油压千斤顶的作用力一般用油压表来测定和控制，为了正确控制张拉力，因此需对油压表和千斤顶进行标定。测试合格后方可用于施工中。c、张拉施工人员安排组成张拉班，技术负责人2人、司泵2人、记录2人、千斤顶操作者2人，各负其责。张拉前对张拉班进行培训，使其明白设备性能、操作规程和安全要领等方面的知识。d、预应力筋张拉预应力筋按技术规法和设计图纸进行张拉，张拉程序为0初应力k（持荷2min锚固）。张拉时，边张拉边测量伸长值，采用应力、应变双控制，实际伸长值与理论伸长值相比误差控制在6%以内，如发现伸长值异常则暂停张拉并通知监理工程师，张拉现场记录及时整理，并报监理工程师，并按监理工程师批示的措施进行处理。各批钢束张拉时按设计要求为对称张拉或单侧张拉。张拉过程中统一指挥，两端张拉速度尽可一致，出现响动或异常现象应立即停止施工，进行检查，查明原因后再进行张拉。5、孔道压浆压浆前为孔道压浆流畅，并使浆液与孔壁结合良好，压浆前用高压水冲洗孔道，然后用无油脂压缩空气吹干，采用真空灌浆工艺及时灌浆，压浆时采用边拌和边压浆的方式连续进行，直至出口冒出新鲜水泥浆，其稠度与压注的浆注相同时即可停止。压浆施工完毕后，立即进行封锚混凝土施工。8、卸架预应力工程施工完毕后，开始进行卸架卸架时按先跨中后两边的顺序进行均匀拆除，严禁野蛮施工，卸架后的支架应堆放整齐，以便以后的施工。9、荷载检算支架验算附后六、质量保证措施（一）质量保证措施1.模板采用竹胶板，接缝加塞海绵条，模板表面刷脱模剂。2.所有原材料必须经试验合格并严格过筛后，方准使用。3.张拉设备与锚具配套，梁体强度及龄期达到设计要求后采用双控法张拉，分批对称张拉； 4.混凝土的灌注采用斜面分级、水平分层一次浇注完成，保证砼的接茬时间不大于砼的初凝时间；采用附着式振动器振捣。5.现浇箱梁施工时先对支架进行预压，并根据混凝土的弹性和非弹性变形及支架的弹性和非弹性变形设置施工预拱度。（二）确保工程质量的技术措施1、材料方面1）水泥在所用水泥品牌的选用上，尽量选用中、低水化热水泥品种，尽量降低水泥硬化过程中的水化热。2）粗骨料骨料的级配必须合理，尽量采用自然连续级配的粗骨料，粒径一般为540mm，且不得有针片状碎石或石屑。含泥量控制在0.5%以内，以避免因含泥引起混凝土强度降低和成型混凝土外观颜色失真花脸。3）细骨料制度保证标准保证组织保证思想保证质 量 控 制 标 准健 全 机 构 专 人 负 责 制创优措施质 量 保 证 体 系质量法规创优规划质量方针质量管理领导小组安 全 质 量 部工程、试验、保障队技术室、QC小组项目总工程师各施工队队长质检(监)工程师专(兼)职质检员质量标准质量管理手册体系程序文件作 业 指 导 书质量记录规范验收标准质量责任制开工报告审批制设计文件复核制测量双检制工程试验检测制质量自检制隐蔽工程检查签证制日常定期质量教育制工艺流程规范操作制工程质量报告制质量事故处理制质 量 管 理 制 度方法保证材料进货检验自检互检交接检施工过程抽样检查关键工序工程预检定期(月、旬)检查不 合 格 品 控 制技术保证施 工 过 程 控 制技术培训施工规划技术交底资料控制质量监督工艺控制操作控制实现质量目标贯标宣传质 量 意 识教育质量目标 图9-1-1 工程质量保证体系框图 工程质量保证体系框图以中粗砂为宜。并应尽量减小砂率，含泥量控制在1.0%以内。在材料选择中，一般选定一种材料就不宜再更换，以保证成型混凝土外观颜色保持一致，以保证美观。同时必须确保拌和物的质量，拌和楼使用电子称计量，保证配料准确。如无把握则延长搅拌时间，使混凝土搅拌均匀，更应严格控制出料混凝土的坍落度，以保证混凝土的强度以及外观质量。2、支架支架在搭设前必须挂好每孔的纵向中心线，沿中心线向两侧对称搭设支架。可调顶托调整高度严格控制在30cm以内，以确保架子顶自由端的稳定。底托安放时必须用硬木楔垫平，以保证立杆的垂直度。3、钢筋施工时宜先将普通钢筋制成平面或立体骨架，骨架在地模上制作，焊接牢固。在制作骨架时，特别注意严格控制弯起筋的弯折角度，确保同一平面内的弯起筋严格处于同一平面内。焊接钢筋时，要用湿棉纱布或薄铁皮等垫在钢筋接头下，避免灼伤模板。腹板、横梁钢筋骨架的高度必须严格控制，在认真复核图纸、精准推算顶板保护层尺寸后，进行反算控制骨架主筋、弯起筋高度，并留有12cm富余量，避免骨架露出顶板或保护层不够现象出现。在绑扎腹板箍筋时，其弯头交合处应相互错开、交叉布置。顶、底板钢筋绑扎前要按钢筋布置间距在箱梁模板或钢筋上作出标记，绑扎时严格按标记布设、绑扎钢筋。顶板与底板中两层钢筋的间距用支撑板凳筋控制，板凳筋分布间距可以按1.5X1.5m间距布设。板凳筋必须绑扎或点焊布设牢固，不得倒塌而减小两层钢筋间距。考虑到梁体内力分布，腹板钢筋留设于梁上对接的焊缝宜留设到1/4梁跨处。顶、底板钢筋保护层的留设必须严格符合设计及规范要求，以免因保护层原因出现砼裂纹或漏筋现象。4、混凝土混凝土浇注前应用高压水枪及大功率吸尘器彻底冲洗底板、清理完杂物，特别是焊条头、焊渣、大块焊溜、扎丝等金属物必须清拣干净，以免拆模后日久底板出现锈迹。混凝土浇注前留意天气情况，必要时备足防雨布。在砼浇注过程中，派专人全过程检查支架的支撑、加固情况，逐个卡扣敲击检查，松、脱处及时处理。箱梁浇注宜先底板、后腹板（分层厚3040cm）从一端向另一端层层推进、顺序进行。混凝土浇注分层长度不宜太长，以免形成施工冷缝。顶板混凝土的顶面标高要于两侧翼缘板上拉线控制，确保混凝土的浇注厚度满足要求、不超高。在混凝土浇注过程中至最后浇注的砼初凝前每间隔30分钟，由两头挂设的倒链来回抽动钢绞线数次，以防止波纹管漏浆堵塞死管道。5、振捣混凝土的振捣用插入式振捣棒，振捣时间要适当掌握不要漏振也不要过振。振捣棒不得撞击波纹管、各种预埋件，避免其跑位。钢筋较密处可以用小直径振捣棒振捣，小直径振捣棒功率低、作用半径小，注意适当延长振捣时间、加强振捣。振捣顶、底板及翼缘板砼时要在棒头上作好振捣深度标记，严格控制好振捣深度，避免振捣棒触及模板。6、养生混凝土浇筑时间尽量安排在晚上，以保证混凝土的温度较低，同时白天温度较高时采用不间断的水养护，保证混凝土低温和湿润，有效保证混凝土的强度增长和外观质量。七、安全保证措施实行“安全第一，预防为主”的方针，结合本工程实际，依据通过认证的GBT28001职业健康安全管理体系标准，在本工程中建立和健全安全保证体系，从思想、组织、制度和经济上确保安全目标的全面实现；具体安全措施应符合国家及广东省公路工程安全生产管理规定，安全保证体系见下图。1、思想保证1）工前、工中、工后不间断的安全教育、提高全员安全意识。2）开展安全生产周活动，针对工程阶段特点，加强教育。3）每日安全工作讲评制度，持续改进安全工作，让全员认识到位。4）开展施工安全技术规程教育，杜绝事故。2、组织保证1）成立项目部安全领导小组，督查安全工作。2）建立项目部、专业队、工班三级安全体系，责任到人，逐级包保。3、制度保证1）安全风险源标识制度。在工程的不同阶段，不同部位，不同作业区段，标识危险源，挂牌警示，加强视觉识别。2）安全标准工地规划制度。按照规划合理布置施工现场，消除可能的不安全因素。实行安全生产承包责任制广中江高速公路第TJ08合同段安全保证体系组织保证思想保证制度保证经济保证经理部安全领导小组提高全员安全意识各项安全生产制度工程技术部部安全质量部月