钢支撑安装和拆除施工方案

钢支撑安装和拆除施工方案内容摘要：

及规范，向施工人员进行工程内容交底，使施工管理和作业人员了解掌握施工方案、工艺要求、工程内容、技术标准、施工程序、工期要求、安全措施等 ,做到心中有数 ,施工有据；施工阶段由经理部技术人员对该分项工程进行工程结构、工艺标准、技术标准及安全措施的交底；现场技术交底由作业层技术人员向领工员、工班长交底。 施工技术交底，以书面交 底为主，包括结构图、表和文字说明。 交底资料必须详细准确、直观、符合施工规范和工艺细则要求 ,并经第二人复核确认无误后交付使用，交底资料妥善保存备查。 项目 钢支撑轴线竖向偏差 支撑曲线水平向偏差 支撑两端的标高差和水平面偏差 支 撑 挠曲度 横撑与立柱的偏差 允许值 177。 30mm 177。 30mm ≤ 20mm、≤ 1/600L 不大于1/1000L ≤ 30mm 武汉市轨道交通 11号线三标段 未来一路站 钢支撑安装和拆除施工 方案 12 ③关键工序实施前要编制详细的工艺细则及作业指导书，并有明确的技术要求和质量标准。 ④ 项目部定期组织技术人员、质检人员、工班长、领工员等对施工现场进行检查，找出在施工存在的问题，分析原因，并及时改正。 （ 3）技术质量控制要点 ① 严禁拖延第一道砼支撑的施工时间。 第一层土方开挖后尚未支撑前，桩顶处水平位移随无支撑暴露时间的延长而增大。 要 及时施做混凝土支撑，避免影响周围环境的安全。 ② 钢支撑施工要紧随挖土作业，随挖随撑，无撑挖土时间控制在 8小时以内，不允许延误，各层土必须遵循先撑后挖抽槽开挖支撑原则。 ③ 围护结构不平处须用风镐修平，钢围檩与围护结构必须密贴，禁止垫木板，空隙处用快硬细石砼填充。 钢支撑端面和围护结构接触面应垂直和平整。 ④ 钢支撑在起吊就位前须进行试拼装（对直线性不好的支撑组合禁止），并按设计长度拼装连接好，用 25t汽车 吊 配合 16t 龙门吊 整体起吊安装。 ⑤ 支撑牛腿关系重大，焊工需经过专业培训获得证书，焊接定人定责，阴雨天须 设可靠防雨蓬。 必须派专人检查焊接质量，特别是对下口焊接质量的检验，应特别重视。 ⑥ 直支撑要沿围护结构法线方向设臵，应对每道支撑的轴线位臵进行准确定位，支撑前再依次放出每根支撑位臵。 ⑦ 支撑安装后要注意实时监测、观察。 ⑧ 对施加预应力的油泵 装置 要经常检查，以确保应力值的正确性与稳定性，每根支撑撑好后，在 12～ 14 小时内观察预应力损失及围护结构的水平位移情况，当昼夜温差过大导 致支撑预应力损失时，立即在当天低温时段复加预应力至设计要求值。 ⑨ 下道支撑预应力的施加，会导致上道支撑应力值的减小，此时应根据监测 单位提供的数据适当补加轴力。 （ 4） 防支撑失稳措施 ① 在基坑开挖过程中，边开挖边架设工字钢或型钢连系杆件及钢支撑，连接处要可靠，减少长细比，确保支撑体系稳定。 ② 支撑拼接采用扭矩扳手，保证法兰螺栓连接强度。 拼接好支撑须经质检工程师检查合格后方可安装。 对千斤顶、压力表等加力设备定期校验，并制定严格的预加力操作规程，保证预加轴力准确。 武汉市轨道交通 11号线三标段 未来一路站 钢支撑安装和拆除施工 方案 13 ③ 按照监测方案要求设臵轴力监测断面，当支撑轴力超过警戒值时，立即停止开挖，加密支撑，并将有关数据反馈给设计部门，共同分析原因，制定对策。 6 安全文明施工及消防措施 (1） 项目部专职安全员对现场施工人员进行安全教育和安全技术交底。 (2）加强防火管理，现场有足够的消防器材，防止火灾发生。 (3）加强安全用电管理，现场禁止使用裸线，不得私架电线，加强用电线路和电焊机使用的检查，尤其是要在大风雨后对供电线路进行检查，防止漏电等现象发生。 (4) 施工时注意对监测装置的成品保护。 (5)焊接作业人员必须持证上岗 ,严禁无证操作 ,焊机必须采用接地和漏电保护装置 ,以保证操作人员安全。 (6)钢支撑的设置时间必须严格按设计情况掌握，土方开挖时应分段分层，按基坑开挖深度及开挖时间及时架设钢支 撑。 (7)基坑开挖过程中要防止挖土机械碰撞支撑体系，并注意不得在支撑上加载，以防支撑失稳造成事故。 (8) 作 业 人 员 进 入 现 场 施 工 必 须 正 确 偑 戴 安 全 帽。 武汉市轨道交通 11 号线三标段 未来一路站 钢支撑安装和拆除施工 方案 14 （英文版 ） Two regulations promulgated for implementation is in the party in power for a long time and the rule of law conditions, the implementation of prehensive strictly strategic plan, implementation in accordance with the rules and discipline to manage the party, strengthen innerparty supervision of major initiatives. The two regulations supporting each other, the code adhere to a positive advocate, focusing on morality is of Party members and Party leading cadres can see, enough to get a high standard。 rule around the party discipline, disciplinary ruler requirements, listed as negative list, focusing on vertical gauge, draw the party anizations and Party members do not touch the bottom line . Here, the main from four square face two party rules of interpretation: the first part introduces two party Revised regulations the necessity and the revision process。 the second part is the interpretation of the two fundamental principles of the revision of laws and regulations in the party。 the third part introduces two party regulations modified the main changes and needs to grasp several key problems。 the fourth part on how to 武汉市轨道交通 11 号线三标段 未来一路站 钢支撑安装和拆除施工 方案 15 grasp the implementation of the two regulations of the party. code and Regulations revised the necessity and revised history of the CPC Central Committee the amendment to the Chinese Communist Party members and leading cadres honest politics several guidelines and Chinese Communist Party discipline and Punishment Regulations column 1 by 2020 to strengthen party laws and regulations focus. Two party regulations revision work lasted a Years, pooling the wisdom of the whole party, ideological consensus, draw historical experience, respect for the wisdom of our predecessors, which reflects the unity of inheritance and innovation。 follow the correct direction, grasp the limited goals, adhere to the party39。 s leadership, to solve the masses of the people reflect a focus on the problem. The new revision of the code and rule , reflects the party39。 s 18 and the eighth session of the third, the spirit of the fourth plenary session, reflecting the experience of studying and implementing the General Secretary Xi Jinping series of important speech, reflects the party39。 s eighteen years prehensive strictly practice. (a) revised two regulations of the party need of the ICAC guidelines 武汉市轨道交通 11 号线三标段 未来一路站 钢支撑安装和拆除施工 方案 16 in in 1997 Leaders as members of the Communist Party of China clean politics certain criteria (Trial) based on revised, the promulgation and implementation of January 2020, to strengthen the construction of the contingent of leading cadres play an important role. But with the party to manage the party strictly administering the deepening, has not been able to fully meet the actual needs. Content is too plicated, eight prohibition, 52 are not allowed to hard to remember, and also difficult to put into practice。 the second is concisely positive advocated by the lack of prohibited provisions excessive, no autonomy requirements。 the third is banned terms and discipline law, both with the party discipline, disciplinary regulations repeat and Criminal law and other laws and regulations repeat。 the fourth is to clean the theme is not prominent, not for the existing problems, and is narrow, only needle of countylevel leading cadres above. rule is in 1997 Chinese Communist Party disciplinary cases (Trial) based on revision, in December 2020 the promulgation and implementation, to strengthen the construction of the party play very important role. Along with th。