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重庆建工住宅建设有限公司沙坪坝区天星桥在校整体改扩建工程锚杆挡墙施工方案第1页共64页目录第一章工程概况·········································································3一、工程概况·············································································3二、施工平面布置·········································································4三、施工要求·············································································4四、技术保证条件·········································································5五、施工现场重难点及应对措施·····························································5第二章编制依据·········································································10一、相关法律、法规及规范性文件··························································10二、标准、规范··········································································10三、地方标准及要求······································································10四、结合本工程相关资料·····························································12第三章施工计划········································································12一、施工分析·······································································12二、施工准备············································································12三、施工进度计划········································································13四、材料与设备计划······································································13第四章施工工艺技术····································································14一、技术参数············································································14二、工艺流程············································································15三、施工方法············································································15四、检查验收············································································26五、扬尘治理·········································································28六、排水措施·········································································29第五章施工安全保证措施·································································29一、组织保障···········································································30二、技术措施············································································40三、应急预案············································································40四、监测监控············································································44五、危险源识别及应急预案·································································48六、文明施工环境保护措施·······························································49第六章劳动力计划······································································53一、专职安全生产管理人员································································54二、特种作业人员及需求计划······························································54第七章计算式及相关图纸······························································55一、脚手架计算式······································································55二、相关图纸········································································65重庆建工住宅建设有限公司沙坪坝区天星桥在校整体改扩建工程锚杆挡墙施工方案第2页共64页第一章工程概况一、工程概况工程地址位于重庆市沙坪坝区天星桥正街，施工区域呈长方形平行于天星桥正街，东面紧邻天星桥中学学生宿舍，西面为天骄教学楼，南面紧邻天宇教学楼，北面为西南医院家属区，施工道路相邻天宇教学楼右侧，与城市道路相连，受早、晚高峰影响及货车限行规定，施工车辆进出时间需做相应调整，满足施工进度要求。1.工程名称沙坪坝区天星桥中学整体改扩建项目2.工程特点本工程的边坡按板肋式锚杆挡墙支护，1：0.15坡率放坡。边坡支护划分3个施工段，即A1～A3、A3～A4、A4～A5，先行施工A4～A5段，长度30.0米，板高7.4米～10.5米；A3～A长度32.0米，板高10.5米～8.3米；A1～A3长度22.5米，板高10.6米；3.0米高做一施工段，分层自上而下逆作法施工，与土石方开挖相互交叉作业。3.边坡概况拟建教学楼西北侧与邻近三军医大家属院之间由于平场开挖，现已形成高8～11米左右的挖方边坡根据现场调查，结合前期钻孔ZK50，该边坡为岩土质混合边坡，土层厚度1～3米左右，不属于高切坡。4.边坡工程地质及水文条件本场地区域地貌形态为浅丘地貌，地形总体西南侧稍高，整体地势由西南向北东侧呈三级平台台阶状展布，第一级平台为现有西南侧各栋教学楼以及教学楼间的平台组成的一级平台，二级平台为现有学校足球场，三级平台为沿足球场北东侧的现有食堂部分地带，由于拟建场地为天星桥中学校园内，各级平台之间形成的陡坎均采用挡墙进行了支挡，目前整体稳定，未见明显变形开裂迹象，地面坡度3～8°，一般为5°。拟建场地及周边地形最高标重庆建工住宅建设有限公司沙坪坝区天星桥在校整体改扩建工程锚杆挡墙施工方案第3页共64页高为西南侧288.32m，勘察区北东侧最低标高271.40m，相对约16.92m，地形条件简单。据调查，场区无化学污染源，且场内多数地段土层较薄，土层为未污染土，根据规范和当地经验判定环境水和土层对混凝土结构、对钢筋混凝土结构中钢筋仅具微腐蚀性。根据区域地质资料、周边访问调查及本次勘察结果可知，在勘察区域内及周边无滑坡、危岩及崩塌体、泥石流、断层及破碎带等不良地质现象。二、施工平面布置根据本工程实际情况，对施工便道、水电、材料堆码场、钢筋加工场等进行合理的设置(详见附图)。1、施工便道修筑路基宽度8m，（局部松软土层路基，片石换填），至施工点2、水电按业主指定接口长约250m接入施工现场，电从业主配电室引出，施工现场设置2个二级配电箱，主线路沿施工外围铺设至各施工点。其配备功率要满足所有用电量的功能，施工机械设置配电箱，做到一机一箱一闸一漏。3、材料堆码场根据实际施工需要设置，材料堆场用C20，厚0.1m混凝土硬化。4、钢筋加工房钢管搭设，按重庆市工程建设标准设计DJBT-046要求，及《重庆市房屋建筑和市政设施工程安全文明施工标准图集》(二)12J02规定执行,两层间挂安全警示牌。三、施工要求1.加强施工过程中的质量与安全控制，确保施工质量及安全。2.安装及机械操作人员需取得特殊作业人员资格上岗证。3.施工前对施工人员进行安全技术交底，严禁盲目施工。重庆建工住宅建设有限公司沙坪坝区天星桥在校整体改扩建工程锚杆挡墙施工方案第4页共64页4.在确保施工质量及安全的前提下，制定赶工措施，确保工程进度满足业主要求。5.施工过程中，交叉作业的现象时分突出，需加强与土石方开挖等相关协调工作，确保工程进度。6.施工工程需严格执行本《专项施工方案》。四、技术保证条件1.严格执行现行国家标准、地方标准、规范及相关文件要求；严格按照施工设计图、边坡防护施工专项方案进行施工。2.施工前严格履行交底程序，对施工人员及所有作业人员进行详细的技术和安全交底，做到各层交底到位并落实到具体人员上，明确各自岗位职责。3.在施工过程中，按照质量监督程序进行随时跟踪和监控，保证施工安全和工程质量。五、施工现场重难点及应对措施1.如何确保高边坡开挖施工的安全？应对措施：为确保高边坡安全，同时为了确保工期，采取分层、分段自上而下逆作法施工。在土石方开挖完成高度3m，分段长度原则上不超过30m，立即进行该段边坡支护施工，施工完毕后及时拆除该段边坡脚手架。人力将架管、钢材、机具等材料转运至固定材料堆码场。再进行下一层段土石方开挖、边坡支护施工，依次循环推进。即便是纵向分段施工，亦不可避免相互干扰。整个施工作业会产生大量二次转运物质（脚手架、模板、钢材、水泥、机具设备等）工程量。需现场核量核价。2.板肋式锚杆挡墙单面模板的加固直接影响坡面支护结构的完成质量及施工过程的安全，如何加固处理？应对措施：为了确保坡面完成质量及施工安全，采用锚杆对单面模板进行加固。加固锚杆参数：锚孔50mm，孔深1500mm，内设单根Ф14钢筋，并灌重庆建工住宅建设有限公司沙坪坝区天星桥在校整体改扩建工程锚杆挡墙施工方