第二节 长滨支路管网改迁通道钢结构管架保护及拆除方案钢结构管架概况该段钢结构管架位于项目东侧及东北侧的长滨支路，为项目前期管网改迁时设立，将使用至其上面的管线全部迁移回项目内永久的管廊内后由我司负责拆除和残值回收等工作。 钢结构管架平面位置图钢结构管架现状：钢结构管架上管线主要包括电力、电信、通讯、燃气等市政管线，各管线使用状况正常，钢结构部分没有出现倒塌、倾斜的现象。长滨支路段的管架周围行人、车辆较多，位于冷却塔西侧段的管架与冷却塔管道呈立体式交错状态，项目北侧的管网紧贴项目建筑红线。长滨支路段管架现状 冷却塔西侧管架现状项目北侧管架现状钢结构管架保护影响钢结构管架安全因素主体结构施工在项目范围内的永久管廊没有施工完成前，该段钢结构管架不能拆除。本工程施工可能会对管架的稳定性和管线安全造成一定的威胁。长滨路拆除因冷却塔西侧段管架与长滨路之间的距离比较接近，而在项目施工后期会挖除长滨路，挖除时可能会产生土石方塌或坠落的状况，对管架结构及管线可能产生破坏。人为破坏及割盗行为钢结构管架位于长滨支路上，而长滨支路平时具有较大人流、车流量，不排除有部分行人对钢结构进行破坏的行为，以及发生意外交通事故时对管架造成不同程度的破坏。
管架上为各种市政管网，不法分子对管线割盗也是威胁管线正常使用的因素之一。 保护措施搭设钢管防护架为保证项目北侧展览馆前及冷却塔西侧段的管架安全及正常使用，我司将在管架四周搭设一道双排钢管防护架来对其进行安全保护。钢管架搭设为全封闭式，顶面采用双层硬防护满铺竹跳板。钢管架搭设如图示： 防护架主要参数为：φ48钢管；横距=钢结构管网架宽度+2×500mm；纵距为1.5m；步距不大于1.2m；搭设高度=钢结构管网架高度+1400mm；两侧面设置竖向剪刀撑；每根钢结构立柱处如图设置一道钢管抱箍增加稳定性；采用双层硬防护满铺竹跳板；靠本项目一侧钢结构架子管回收，立面安装一层竹笆，外满挂密目网。施工阶段对钢结构架的保护基础施工阶段，严格监督挖机等机械设备的使用，避免在基坑周边发生乱挖乱运现象。在基坑与钢结构管架之间布置监测点，监测管架周边土体沉降和钢结构管架的稳定性，监测频率为每天2次，并由监测人员做好监测记录。施工过程中一旦发生土体沉降超过安全值，应立即停止开挖，采取有效的措施后方可继续施工。主体结构施工阶段在靠近钢结构管架一侧搭设全封闭式防护，外侧满挂竹夹板+密目网。施工过程中避免采用大型机械设备在管架周边施工，尽量采用小型机械或人工方式进行施工。
施工前对施工人员进行安全技术交底，向其说明现场周边情况，不允许从楼层上向下抛扔建筑垃圾，严禁野蛮施工。其他措施钢结构位于长滨支路段在施工期间仍有较大人流及车流量，为保证该段管架安全，我司将指派专人协助交通管理部门对通过该路段的车辆、行人进行指挥，做好与各方的沟通协调工作，避免安全事故的发生。为不影响长滨支路的正常通行和管架安全，在管架周围设置安全警示带、警示标志，避免车辆及行人对钢结构管架、管线造成破坏。保安全天候巡逻，发现割盗、恶意破坏行为时及时进行制止，并向当地政府部门反映。管线改迁根据招标文件要求，在本工程S6层所道路施工完后将长滨支路钢结构管架上的所有管线迁移至S6层道路下面，而后再对钢结构管架进行全部拆除。管线迁移方法由于管线迁移后电缆供电来源维持原状不变，我司将采取断网连接的方式进行改迁工作。管线迁移前在S6层先将新的管线埋设好并预留接头，同物业及相关单位沟通协调后确定断线时间，待所有管线核对无误后，再对钢结构管架上的管线进行切割，最后进行管线的连接。注意事项管线改迁前对管线进行分类，并在其表面做好标识。新管线埋设时做好管线的保护工作，禁止乱扔、碾压管线。管线切割原管线时做好安全准备工作，提前关掉电缆供电电源，避免发生安全事故。
管线迁移至S6层道路完成连接后，应进行管线复核，以免发生管线接错的现象。钢结构管架的拆除施工准备技术准备根据现场实际情况编制相应的施工措施，并在拆除前对所有参与拆除的作业人员进行安全技术交底。认真检查各种管、电线的情况，确认对拆除作业无安全威胁后方可施工。清理施工现场的杂物，疏通运输道路，做好施工中临时用水、用电的准备工作。在拆除危险区域时提前设置临时围档、悬挂安全警示标志。移动脚手架等辅助工具在使用前应进行检查，确认安全后方可使用。人员配备职务/工种 人数基本职责钢结构工程师1负责拆除过程中的技术指导工作责任工程师2负责拆除过程中的机械设备及劳动力调配安全员4负责现场的安全监督、检查工作铆工7负责拆除工艺的具体操作吊装工4负责拆除过程吊装的具体操作焊工4负责保护性拆除过程切割的具体操作其他人员4辅助施工4.1.3 主要机械设备序号机具名称数量单位1吊车2台2切割设备4套3扳手8把4千斤顶4台5配电箱2个6扁平吊带/钢丝绳4套7活动脚手架4套8棕绳50米9其他常用工具若干钢结构拆除拆除顺序附属支撑部分拆除→钢结构两侧栏杆拆除→钢梁拆除→钢柱次梁拆除→钢柱拆除→地面混凝土构件拆除→拆除构件整齐堆放→现场清理拆除措施拆除原则先上后下、先里后外、先非承重后承重红线外的钢结构管架拆除尽可能安排在夜间，避开白天长滨支路人、车流量较大的时段，防止发生安全事故。
红线内管架可根据工地实际情况安排白天或夜间进行。在拆除的钢结构拉警戒线，并设明显的标志，并设专人负责看管，与施工无关的人员进入。施工从顶部第一层平台开始，该层作业完毕，向下一层平台转移附着杆和木板。 对易碎铁器及小部件用铁桶装上后再向下运输。施工以一平台向上为一个施工阶段，上一平台未完工绝对不进入下一层平台施工，不上下交叉作业.施工时，如需用电，接电，不允许其他人员私拉乱接。制定完善的规章制度，作业前对所有施工人员进行安全技术交底。特种作业人员必须持证上岗。在平台上的作业人员必须系好安全带，保险带须调换位置时手不离钢架钢结构架子管回收，做到万无一失。拆除过程中，派专人巡视施工部位及周围的情况，发现有危险情况及时制止并及时上报。夜间拆除时，严禁乱扔乱敲，避免影响周边居民休息。their own conditions to develop the correct road, the maximum to avoid investment risk, gain profit.(three) vigorously promote the brand. To establish brand awareness, awareness of the use of brand, brand value, brand acquisition performance, enhance the competitive strength. Concentrated manpower, careful planning, packaging and publicity of a number of unique, market influence and coverage of the brand, the implementation of key breakthroughs, to enhance the competitive strength, walking business road the competition of alienation and characteristics, the pursuit of stability and development of the market.(four) to promote the integration of resources. To further broaden their horizons, effective integration of resources within the group, the city resources, other industries and regional resources, mutual trust, mutual benefit, seeking win-win principle, in the framework of national policies and regulations, strict inspection and argumentation, legal consultation, examination and approval procedures, strict regulation of economic activities, attract injection the social investment to the industry group, to achieve leveraging the development, ensure that the value of state-owned assets.(five) to strengthen the construction management personnel. Strengthen the management of education and training of cadres and workers of the existing business, firmly establish the concept of the market, enhance the sense of crisis to adapt to market competition, the sense of urgency, improve the ability to respond to market competition, improve management and operation of the market. At the same time, according to the need of industrial development, vigorously the introduction of high-quality management management personnel, and strive to build a high-quality professional management team, hard work, and promote the entire workforce knowledge structure, age structure, structure optimization and upgrading ability, enhance core competitiveness, adapt to the need of market competition.(six) seriously study the policy for policy. Serious research about social support the development of cultural undertakings in the country and the XX policy, especially the policy of industrial development, financial investment policy, financial policy and tax policy, and actively seek policy, projects and funds, enterprise and industry group mission to promote leapfrog development. their own conditions to develop the correct road, the maximum to avoid investment risk, gain profit.(three) vigorously promote the brand. To establish brand awareness, awareness of the use of brand, brand value, brand acquisition performance, enhance the competitive strength. Concentrated manpower, careful planning, packaging and publicity of a number of unique, market influence and coverage of the brand, the implementation of key breakthroughs, to enhance the competitive strength, walking business road the competition of alienation and characteristics, the pursuit of stability and development of the market.(four) to promote the integration of resources. To further broaden their horizons, effective integration of resources within the group, the city resources, other industries and regional resources, mutual trust, mutual benefit, seeking win-win principle, in the framework of national policies and regulations, strict inspection and argumentation, legal consultation, examination and approval procedures, strict regulation of economic activities, attract injection the social investment to the industry group, to achieve leveraging the development, ensure that the value of state-owned assets.(five) to strengthen the construction management personnel. Strengthen the management of education and training of cadres and workers of the existing business, firmly establish the concept of the market, enhance the sense of crisis to adapt to market competition, the sense of urgency, improve the ability to respond to market competition, improve management and operation of the market. At the same time, according to the need of industrial development, vigorously the introduction of high-quality management management personnel, and strive to build a high-quality professional management team, hard work, and promote the entire workforce knowledge structure, age structure, structure optimization and upgrading ability, enhance core competitiveness, adapt to the need of market competition.(six) seriously study the policy for policy. Serious research about social support the development of cultural undertakings in the country and the XX policy, especially the policy of industrial development, financial investment policy, financial policy and tax policy, and actively seek policy, projects and funds, enterprise and industry group mission to promote leapfrog development.their own conditions to develop the correct road, the maximum to avoid investment risk, gain profit.(three) vigorously promote the brand. To establish brand awareness, awareness of the use of brand, brand value, brand acquisition performance, enhance the competitive strength. Concentrated manpower, careful planning, packaging and publicity of a number of unique, market influence and coverage of the brand, the implementation of key breakthroughs, to enhance the competitive strength, walking business road the competition of alienation and characteristics, the pursuit of stability and development of the market.(four) to promote the integration of resources. To further broaden their horizons, effective integration of resources within the group, the city resources, other industries and regional resources, mutual trust, mutual benefit, seeking win-win principle, in the framework of national policies and regulations, strict inspection and argumentation, legal consultation, examination and approval procedures, strict regulation of economic activities, attract injection the social investment to the industry group, to achieve leveraging the development, ensure that the value of state-owned assets.(five) to strengthen the construction management personnel. Strengthen the management of education and training of cadres and workers of the existing business, firmly establish the concept of the market, enhance the sense of crisis to adapt to market competition, the sense of urgency, improve the ability to respond to market competition, improve management and operation of the market. At the same time, according to the need of industrial development, vigorously the introduction of high-quality management management personnel, and strive to build a high-quality professional management team, hard work, and promote the entire workforce knowledge structure, age structure, structure optimization and upgrading ability, enhance core competitiveness, adapt to the need of market competition.(six) seriously study the policy for policy. Serious research about social support the development of cultural undertakings in the country and the XX policy, especially the policy of industrial development, financial investment policy, financial policy and tax policy, and actively seek policy, projects and funds, enterprise and industry group mission to promote leapfrog development.
