We will continue to improve the company's internal control system, and steady improvement in ability to manage and control, optimize business processes, to ensure smooth processes, responsibilities in place; to further strengthen internal controls, play a control post independent oversight role of evaluation complying with third-party responsibility; to actively make use of internal audit tools detect potential management, streamline, standardize related transactions, strengthening operations in accordance with law. Deepening the information management to ensure full communication \o constantly perfect ERP, and BFS++, and PI, and MIS, and SCM, information system based construction, full integration information system, achieved information resources shared; to expand Portal system application of breadth and depth, play information system on enterprise of Assistant role; to perfect daily run maintenance operation of records, promote problem reasons analysis and system handover; to strengthening BFS++, and ERP, and SCM, technology application of training, improve employees application information system of capacity and level. Humanistic care to ensure \To strengthening Humanities care, continues to foster company wind clear, and gas are, and heart Shun of culture atmosphere; strengthening love helped trapped, care difficult employees; carried out style activities, rich employees life; strengthening health and labour protection, organization career health medical, control career against; continues to implementation psychological warning prevention system, training employees health of character, and stable of mood and enterprising of attitude, created friendly fraternity of Humanities environment. o strengthen risk management, ensure that the business of \ngthened business plans management, will business business plans cover to all level, ensure the business can control in control; to close concern financial, and coal electrilinkage, and energy-saving scheduling, national policy trends, strengthening track, active should; to implementation State-owned assets method, further specification business financial management; to perfect risk tube control system, achieved riskrecognition, and measure, and assessment, and report, and control feedback of closed ring management, improve risk prevention capacity. To further standardize trading, and strive to achieve \ding to law, standardize and fair.\nt, to ensure that potential employees \ngthen performance management, process control, enhance employee evaluation and levels of effective communication to improve performance management. o further quantify and refine employee standards ... Work, full play party, and branch, and members in \prise%uction in the of core role, and fighting fortress role and pioneer model role; to continues to strengthening \ood\construction, full play levels cadres in enterprise development in the挂篮悬臂浇筑连续梁施工工法
1 工法概述
本工法所述为三向预应力变截面连续混凝土箱梁。施工中在墩顶设临时支座使墩、梁固结，承台上对称设置两组钢管混凝土柱临时支撑梁体，采用支架现浇0块、挂篮平衡悬臂浇筑其余块件，最后在跨中合拢。
挂篮悬臂浇筑法适用于不受净空限制的高墩、大跨径的连续梁，连续刚构桥施工。 2 一般要求 2.1 技术管理
2.1.1 施工前完成设计图纸会审和设计技术交底，施工方案和专项技术措施的审核、审批。 2.1.2 对所用参与施工的人员进行技术培训和交底。
2.1.3 每分项工程施工前，必须经过工前检查，并签发检查合格证，由现场技术人员和安全员进行检查，并由施工负责人进行签认。
2.1.4 现场检查、测量的数据等检测应在专用记录本上及时做好记录并签字，数据信息要真实、完整、准确、清晰。
2.1.5 施工过程中及时进行阶段性技术分析总结。 2.1.6 施工现场必须严格遵守业主和监理的现场管理要求。 2.2 作业人员
2.2.1 所有作业人员必须经过岗前技术培训，从事电工、高空作业、机械操作等特殊作业的施工人员必须持证上岗。
2.2.2 作业人员应着装整齐、佩戴安全帽进入施工现场，高空作业人员必须佩戴安全带。 2.2.3 作业人员身体健康，无妨碍施工的病症，严禁酒后作业。
2.2.4 作业人员必须遵守劳动纪律，服从统一指挥，相互协调，严禁违章指挥、违章作业。
2.4.5 所有作业人员必须参加班前技术和安全交底，明确个人任务和职责，掌握操作要求，熟悉安全措施等。 2.3 设备材料
2.3.1 施工机械应性能良好，定期进行保养和检查，确保正常使用。
2.3.2 主要施工机具设备和安全用具要由专人管理，定期进行性能检查、试验并标识，严禁超期使用。 2.3.3 主要施工机具应定机定人，严格执行交接班制度。接班时，必须对机具检查一次，并做好记录。 2.3.4 进场材料要有质量保证书，并按规定进行抽检试验。材料和施工机具应按规定分类存放，标识清楚，防止损伤、污染。 2.4 作业现场
2.4.1 作业现场布置整洁、合理，林区要有特殊防护措施。 2.4.2 场地应平整、坚实、不积水，符合装卸、搬运、消防等要求。 2.4.3 格遵守文明施工管理要求，现场实行封闭管理。 2.4.4 作业现场应设置有工棚、安全设施、标志、标识牌等。
f backbone backbone role; to full strengthening members youth work, full play youth employees in company development in the of force role; to improve independent Commission against corruption work level, strengthening on enterprise business key link of effectiveness monitored. , And maintain stability. To further strengthen publicity and education, improve the overall legal system. We must strengthen safety management, establish and improve the education, supervision, and evaluation as one of the traffic safety management mechanism. o conscientiously sum up the Olympic security controls, promoting integrated management to a higher level, higher standards, a higher level of development. Employees, today is lunar calendar on December 24, the ox Bell is about to ring, at this time of year, we clearly feel the pulse of the XX power generation company to flourish, to more clearly hear XX power generation companies mature and symmetry breathing. Recalling past one another across a railing, we are enthusiastic and full of confidence. Future development opportunities, we more exciting fight more spirited. Employees, let us together across 2013 full of challenges and opportunities, to create a green, low-cost operation, full of humane care of a world-class power generation company and work hard! The occasion of the Spring Festival, my sincere wish that you and the families of the staff in the new year, good health, happy, happy#
We will continue to improve the company's internal control system, and steady improvement in ability to manage and control, optimize business processes, to ensure smooth processes, responsibilities in place; to further strengthen internal controls, play a control post independent oversight role of evaluation complying with third-party responsibility; to actively make use of internal audit tools detect potential management, streamline, standardize related transactions, strengthening operations in accordance with law. Deepening the information management to ensure full communication \o constantly perfect ERP, and BFS++, and PI, and MIS, and SCM, information system based construction, full integration information system, achieved information resources shared; to expand Portal system application of breadth and depth, play information system on enterprise of Assistant role; to perfect daily run maintenance operation of records, promote problem reasons analysis and system handover; to strengthening BFS++, and ERP, and SCM, technology application of training, improve employees application information system of capacity and level. Humanistic care to ensure \To strengthening Humanities care, continues to foster company wind clear, and gas are, and heart Shun of culture atmosphere; strengthening love helped trapped, care difficult employees; carried out style activities, rich employees life; strengthening health and labour protection, organization career health medical, control career against; continues to implementation psychological warning prevention system, training employees health of character, and stable of mood and enterprising of attitude, created friendly fraternity of Humanities environment. o strengthen risk management, ensure that the business of \ngthened business plans management, will business business plans cover to all level, ensure the business can control in control; to close concern financial, and coal electrilinkage, and energy-saving scheduling, national policy trends, strengthening track, active should; to implementation State-owned assets method, further specification business financial management; to perfect risk tube control system, achieved riskrecognition, and measure, and assessment, and report, and control feedback of closed ring management, improve risk prevention capacity. To further standardize trading, and strive to achieve \ding to law, standardize and fair.\nt, to ensure that potential employees \ngthen performance management, process control, enhance employee evaluation and levels of effective communication to improve performance management. o further quantify and refine employee standards ... Work, full play party, and branch, and members in \prise%uction in the of core role, and fighting fortress role and pioneer model role; to continues to strengthening \ood\construction, full play levels cadres in enterprise development in the2.4.3 作业现场紧临黄河大堤，作业现场的布置应精心策划，减少占用林地，施工尽量不破坏黄河大堤的护坡安全性。
2.4.5作业完成清理现场，恢复地貌。 2.5 文件资料
2.5.1 内业文件资料实行标准化管理，及时收集和整理相关施工项目的所有文件资料。
2.5.2 施工组织设计、工艺方案和标准化作业指导手册编写完毕后，经技术负责人审核，批准后实施。 2.5.3 施工过程中现场技术员做好工程日志记录，完整、准确、及时全面反映现场施工情况，做好资料整理与归档。
2.3.4 做好各种材料的质量记录和资料的整理与保存工作，做到各种证明、合格证（单）、验收、试验单据齐全，确保其可追溯和完整性。 2.3.5 施工过程中留取影像资料。 3 工法原理
预应力混凝土连续梁的桥墩与梁体是铰接的，不能抵抗弯矩，施工中设置墩、梁固结的临时支撑，待梁体跨中合拢后解除临时支撑，实现体系转换。挂篮悬臂浇筑是以挂篮为主要施工设备，可在已张拉锚固并与墩身连成整体的梁体上移动，从桥墩对称伸臂逐段现浇梁体砼。每段梁体的立模、绑扎钢筋、浇筑混凝土、预应力张拉都在挂篮内进行，完成本段施工后，挂篮对称向前各移动一节段。梁体的线形和挂篮吊架变形的调整，可通过升降前吊带或预压配重的办法实现。 4 工法流程及操作要点 4.1 工法流程图
挂篮悬臂浇筑施工工法流程图 底板、腹板钢筋安装及预应力管道安装 钢筋作业 波 纹 管 制 备 底板、腹板钢筋安装及预应力管道安装 钢筋作业 箱梁模板模板制作 静载试压 组装挂篮 f backbone backbone role; to full strengthening members youth work, full play youth employees in company development in the of force role; to improve independent Commission against corruption work level, strengthening on enterprise business key link of effectiveness monitored. , And maintain stability. To further strengthen publicity and education, improve the overall legal system. We must strengthen safety management, establish and improve the education, supervision, and evaluation as one of the traffic safety management mechanism. o conscientiously sum up the Olympic security controls, promoting integrated management to a higher level, higher standards, a higher level of development. Employees, today is lunar calendar on December 24, the ox Bell is about to ring, at this time of year, we clearly feel the pulse of the XX power generation company to flourish, to more clearly hear XX power generation companies mature and symmetry breathing. Recalling past one another across a railing, we are enthusiastic and full of confidence. Future development opportunities, we more exciting fight more spirited. Employees, let us together across 2013 full of challenges and opportunities, to create a green, low-cost operation, full of humane care of a world-class power generation company and work hard! The occasion of the Spring Festival, my sincere wish that you and the families of the staff in the new year, good health, happy, happy内模及腹板内竖向预应力筋安装筋 2 顶板钢筋和预应力管道及钢束安装 We will continue to improve the company's internal control system, and steady improvement in ability to manage and control, optimize business processes, to ensure smooth processes, responsibilities in place; to further strengthen internal controls, play a control post independent oversight role of evaluation complying with third-party responsibility; to actively make use of internal audit tools detect potential management, streamline, standardize related transactions, strengthening operations in accordance with law. Deepening the information management to ensure full communication \o constantly perfect ERP, and BFS++, and PI, and MIS, and SCM, information system based construction, full integration information system, achieved information resources shared; to expand Portal system application of breadth and depth, play information system on enterprise of Assistant role; to perfect daily run maintenance operation of records, promote problem reasons analysis and system handover; to strengthening BFS++, and ERP, and SCM, technology application of training, improve employees application information system of capacity and level. Humanistic care to ensure \To strengthening Humanities care, continues to foster company wind clear, and gas are, and heart Shun of culture atmosphere; strengthening love helped trapped, care difficult employees; carried out style activities, rich employees life; strengthening health and labour protection, organization career health medical, control career against; continues to implementation psychological warning prevention system, training employees health of character, and stable of mood and enterprising of attitude, created friendly fraternity of Humanities environment. o strengthen risk management, ensure that the business of \ngthened business plans management, will business business plans cover to all level, ensure the business can control in control; to close concern financial, and coal electrilinkage, and energy-saving scheduling, national policy trends, strengthening track, active should; to implementation State-owned assets method, further specification business financial management; to perfect risk tube control system, achieved riskrecognition, and measure, and assessment, and report, and control feedback of closed ring management, improve risk prevention capacity. To further standardize trading, and strive to achieve \ding to law, standardize and fair.\nt, to ensure that potential employees \o strengthen performance management, process control, enhance employee evaluation and levels of effective communication to improve performance management. o further quantify and refine employee standards ... Work, full play party, and branch, and members in \prise%uction in the of core role, and fighting fortress role and pioneer model role; to continues to strengthening \ood\construction, full play levels cadres in enterprise development in the
4.2 工法操作要点 4.2.1 挂篮拼装
0号块施工完毕后，在其梁面上组拼挂篮，组拼顺序为：
1 将每只挂篮两片桁架下滑道位置抄垫平整，达到挂篮安装高度。 2 铺设挂篮下滑道，安装前滑板、后勾板。
3 安装挂篮菱形构架，安装挂篮后锚固系统，安装横联、平联。 4 安装前上横梁。
5 安装拼装好的挂篮底模平台。 6 安装内滑梁及内模。
7 安装外滑梁、前吊点，外模就位。 4.2.2 1#块悬浇施工
Employees, let us together across 2013 full of challenges and opportunities, to create a green, low-cost operation, full of humane care of a world-class power generation company and work hard! The occasion of the Spring Festival, my sincere wish that you and the families of the staff in the new year, good health, happy, happy拆除模板 锚具安装 穿钢绞线束 张拉机具检修及配套校验 钢绞线编束 张拉纵、横、竖三向预应力钢束（筋） 测量高程 压浆机具检修 移挂篮 管道压浆 分段梁体完成、检验 f backbone backbone role; to full strengthening members youth work, full play youth employees in company development in the of force role; to improve independent Commission against corruption work level, strengthening on enterprise business key link of effectiveness monitored. , And maintain stability. To further strengthen publicity and education, improve the overall legal system. We must strengthen safety management, establish and improve the education, supervision, and evaluation as one of the traffic safety management mechanism. o conscientiously sum up the Olympic security controls, promoting integrated management to a higher level, higher standards, a higher level of development. Employees, today is lunar calendar on December 24, the ox Bell is about to ring, at this time of year, we clearly feel the pulse of the XX power generation company to flourish, to more clearly hear XX power generation companies mature and symm3
We will continue to improve the company's internal control system, and steady improvement in ability to manage and control, optimize business processes, to ensure smooth processes, responsibilities in place; to further strengthen internal controls, play a control post independent oversight role of evaluation complying with third-party responsibility; to actively make use of internal audit tools detect potential management, streamline, standardize related transactions, strengthening operations in accordance with law. Deepening the information management to ensure full communication \o constantly perfect ERP, and BFS++, and PI, and MIS, and SCM, information system based construction, full integration information system, achieved information resources shared; to expand Portal system application of breadth and depth, play information system on enterprise of Assistant role; to perfect daily run maintenance operation of records, promote problem reasons analysis and system handover; to strengthening BFS++, and ERP, and SCM, technology application of training, improve employees application information system of capacity and level. Humanistic care to ensure \To strengthening Humanities care, continues to foster company wind clear, and gas are, and heart Shun of culture atmosphere; strengthening love helped trapped, care difficult employees; carried out style activities, rich employees life; strengthening health and labour protection, organization career health medical, control career against; continues to implementation psychological warning prevention system, training employees health of character, and stable of mood and enterprising of attitude, created friendly fraternity of Humanities environment. o strengthen risk management, ensure that the business of \ngthened business plans management, will business business plans cover to all level, ensure the business can control in control; to close concern financial, and coal electrilinkage, and energy-saving scheduling, national policy trends, strengthening track, active should; to implementation State-owned assets method, further specification business financial management; to perfect risk tube control system, achieved riskrecognition, and measure, and assessment, and report, and control feedback of closed ring management, improve risk prevention capacity. To further standardize trading, and strive to achieve \ding to law, standardize and fair.\nt, to ensure that potential employees \ngthen performance management, process control, enhance employee evaluation and levels of effective communication to improve performance management. o further quantify and refine employee standards ... Work, full play party, and branch, and members in \prise%uction in the of core role, and fighting fortress role and pioneer model role; to continues to strengthening \ood\construction, full play levels cadres in enterprise development in the1 在0号节段上对称拼装两只挂篮并先对接好。 2 安装底模并进行载重试验。
3 卸载并安装外侧模；根据预抬值调整相应底模高程。 4 绑扎底板及腹板钢筋，安装预应力波纹管及竖向预应力钢筋。 5 安装内箱模板。
6 绑扎顶板钢筋，安装预应力筋波纹管，穿横向预应力束。 7 旋臂浇筑梁体混凝土。 8 预应力束张拉、管道压浆。 4.2.3 挂篮走行
1 在已浇筑完的1#块上向前拼接滑道。 2 解除挂篮后锚固。
3 挂篮走行至设计位置，将底模平台临时吊于外模支架或直接吊在外滑梁上，外模支架落于外滑梁；菱形桁片、内滑梁及外滑梁带着外模，底模一次走行到位。 4.2.4 2#-N号块悬浇施工
1 对上一节段砼进行养护，使砼强度达到100%的设计强度。 2 脱空挂篮的内模，侧模。
3 对箱梁在该节段上的纵向锚固束进行预应力张拉。 4 采用千斤顶将底模与砼梁体完全脱空。
5 在已浇注的梁段上接长滑道，并用预埋的U形螺栓将其固定。 6 将底模平台、外导梁的前吊杆（带）转至临时吊挂分配梁上。 7 将内模及内导梁松放于已浇注梁段的内箱中。
8 将前上横梁后移，检查挂篮前后支座及后支座下后钩板受力状况，无误后，卸除后锚固。 9 采用千斤顶顶推或千斤顶向前牵引后支架，使上下游主桁架同步前移至下一节段，并精确定位。 10 安装后锚固。
11 将底模、侧模前吊挂转回前上横梁。
12 在外导梁中部安装吊架，拆除滑梁后吊杆（带）。 13 将底模平台后吊挂转至外导梁上。
14 牵引前上横梁，使侧模、底模、外导梁前移至下一节段。 15 将侧模、底模平台后吊带转至已浇筑箱梁前端预留孔上。 16 对挂篮底、侧模进行精确定位后固定。
17 剩余节段的挂篮走行按上述2#节段的走行流程。 4.2.5 挂篮拆除
最后一段梁体张拉完成后，可拆卸挂篮。拆卸顺序：底模→外模及支架→吊带→前、后横梁→主桁架→垫梁及走道。 4.2.6 线型控制
1 施工前，应对设计图提供的各节段线型控制高程进行核算。
f backbone backbone role; to full strengthening members youth work, full play youth employees in company development in the of force role; to improve independent Commission against corruption work level, strengthening on enterprise business key link of effectiveness monitored. , And maintain stability. To further strengthen publicity and education, improve the overall legal system. We must strengthen safety management, establish and improve the education, supervision, and evaluation as one of the traffic safety management mechanism. o conscientiously sum up the Olympic security controls, promoting integrated management to a higher level, higher standards, a higher level of development. Employees, today is lunar calendar on December 24, the ox Bell is about to ring, at this time of year, we clearly feel the pulse of the XX power generation company to flourish, to more clearly hear XX power generation companies mature and symmetry breathing. Recalling past one another across a railing, we are enthusiastic and full of confidence. Future development opportunities, we more exciting fight more spirited.
Employees, let us together across 2013 full of challenges and opportunities, to create a green, low-cost operation, full of humane care of a world-class power generation company and work hard! The occasion of the Spring Festival, my sincere wish that you and the families of the staff in the new year, good health, happy, happy4
We will continue to improve the company's internal control system, and steady improvement in ability to manage and control, optimize business processes, to ensure smooth processes, responsibilities in place; to further strengthen internal controls, play a control post independent oversight role of evaluation complying with third-party responsibility; to actively make use of internal audit tools detect potential management, streamline, standardize related transactions, strengthening operations in accordance with law. Deepening the information management to ensure full communication \o constantly perfect ERP, and BFS++, and PI, and MIS, and SCM, information system based construction, full integration information system, achieved information resources shared; to expand Portal system application of breadth and depth, play information system on enterprise of Assistant role; to perfect daily run maintenance operation of records, promote problem reasons analysis and system handover; to strengthening BFS++, and ERP, and SCM, technology application of training, improve employees application information system of capacity and level. Humanistic care to ensure \To strengthening Humanities care, continues to foster company wind clear, and gas are, and heart Shun of culture atmosphere; strengthening love helped trapped, care difficult employees; carried out style activities, rich employees life; strengthening health and labour protection, organization career health medical, control career against; continues to implementation psychological warning prevention system, training employees health of character, and stable of mood and enterprising of attitude, created friendly fraternity of Humanities environment. o strengthen risk management, ensure that the business of \ngthened business plans management, will business business plans cover to all level, ensure the business can control in control; to close concern financial, and coal electrilinkage, and energy-saving scheduling, national policy trends, strengthening track, active should; to implementation State-owned assets method, further specification business financial management; to perfect risk tube control system, achieved riskrecognition, and measure, and assessment, and report, and control feedback of closed ring management, improve risk prevention capacity. To further standardize trading, and strive to achieve \ding to law, standardize and fair.\nt, to ensure that potential employees \o strengthen performance management, process control, enhance employee evaluation and levels of effective communication to improve performance management. o further quantify and refine employee standards ... Work, full play party, and branch, and members in \prise%uction in the of core role, and fighting fortress role and pioneer model role; to continues to strengthening \ood\construction, full play levels cadres in enterprise development in the2 悬浇线型控制，应综合考虑悬臂长度与重量、挂篮重量与施工荷载，预加应力、温度及施工调整等因素。
3 梁段悬浇时，中线里程应勤测量、勤复核，对预施应力前后及温度影响应及早找到变化规律并加以修正。
4 测量放样时，应注意对同孔同节段的高程、中线偏位及里程保持一致，以确保顺利合拢与成桥线型。
5 挠度控制一般考虑以下几个方面因素： 1) 根据监控单位提供的数值设置预拱度。。
2) 在施工过程中，每浇筑一梁段，应随时观测梁段发生的实际挠度，并对照理论计算值，在下一梁段浇筑施工中予以调整。
3) 在梁段顶面中心及梁两侧埋设水平观测点随时观测各截面处标高在整个梁体施工中的变化，以及时掌握和调整梁段预拱标高 4.2.7 边跨梁段
边跨现浇段采用支架现浇，支架设计要有足够的强度和刚度，支架和模板安装完成后，按照1.2倍浇筑梁段的重量对支架预压。 4.2.8 合拢段
1 掌握合拢期间的天气情况，测试分析气温与梁温相互关系以及梁体温度变形规律。 2 根据结构情况及梁温的变化情况，在温度较低时锁定合拢口。 3 选择日气温较低，温度变化幅度较小时浇筑合拢段混凝土。
4 为保证浇筑混凝土过程中，合拢口处于稳定状态，在两个悬臂端各加载合拢段混凝土重量一半的配重，并与混凝土浇筑同步卸载。
5 合拢段浇筑混凝土，应全段面一次完成，且浇筑时间亦不得超过4个小时。 4.2.9 体系转换
多跨连续梁结构一般是按平衡悬臂法施工，经过临时支座与桥墩固结，先形成静定状态的T型刚构，通过T构合拢，钢束张拉及调整支座等手段，将单个T型刚构逐渐转换为设计的连续梁结构（超静定）体系。体系转换的方因桥而异，按设计文件执行。 4.2.10 挂篮施工注意事项
1 挂篮后锚固预留孔位置要准确，前上横梁用千斤顶调整时，要由专人在箱内同时操作确保锚固可靠。
2 要严格控制桥面上的临时荷载和挂篮的附加荷载。
3 混凝土浇筑前，必须检查后锚固的连接、前后吊带及横梁的受力情况，并再次收紧吊带，所有起顶后的吊带限位螺栓上紧，千斤顶空隙用硬质垫块抄垫，进行双保险。
4 挂篮及施工机具重量不得超过设计规定值，挂篮拼装好后，应进行加载试验，加载重量为最大梁段重量的1.2倍。
5 两套挂篮移动应同步对称进行，其位移差不大于梁段长度一半。
6 挂篮前移由专人统一指挥，移动前必须在主桁后端挂好防倾千斤绳。挂篮就位后，立即安装后锚
Employees, let us together across 2013 full of challenges and opportunities, to create a green, low-cost operation, full of humane care of a world-class power generation company and work hard! The occasion of the Spring Festival, my sincere wish that you and the families of the staff in the new year, good health, happy, happyf backbone backbone role; to full strengthening members youth work, full play youth employees in company development in the of force role; to improve independent Commission against corruption work level, strengthening on enterprise business key link of effectiveness monitored. , And maintain stability. To further strengthen publicity and education, improve the overall legal system. We must strengthen safety management, establish and improve the education, supervision, and evaluation as one of the traffic safety management mechanism. o conscientiously sum up the Olympic security controls, promoting integrated management to a higher level, higher standards, a higher level of development. Employees, today is lunar calendar on December 24, the ox Bell is about to ring, at this time of year, we clearly feel the pulse of the XX power generation company to flourish, to more clearly hear XX power generation companies mature and symm5
挂篮悬臂浇筑连续梁施工工法
