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施工便道技术交底施工便道技术交底 施工技术交底记录 津市政C1-6 工程名称 津秦客专滨海站市政配套地施工单位 中建六局有限公司桥梁公司 下空间 分部分项工程名称 施工主便道路基及路面 交底日期 2012年7月7日 交底内容: 一、编制说明 1基本概况 津秦客专滨海站交通枢纽配套市政地下空间工程,包含南广场地下停车库及公共换乘空间和轨道交通地下结构预留空间。配套市政地下空间工程总建筑面积约192000?,其中南广场地下停车库及公共换乘空间建筑面积约114400?,轨道交通地下结构预留空间约77600?。 南广场地下...

施工便道技术交底
施工便道技术交底 施工技术交底记录 津市政C1-6 工程 路基工程安全技术交底工程项目施工成本控制工程量增项单年度零星工程技术标正投影法基本原理 名称 津秦客专滨海站市政配套地施工单位 中建六局有限公司桥梁公司 下空间 分部分项工程名称 施工主便道路基及路面 交底日期 2012年7月7日 交底内容: 一、编制说明 1基本概况 津秦客专滨海站交通枢纽配套市政地下空间工程,包含南广场地下停车库及公共换乘空间和轨道交通地下结构预留空间。配套市政地下空间工程总建筑面积约192000?,其中南广场地下停车库及公共换乘空间建筑面积约114400?,轨道交通地下结构预留空间约77600?。 南广场地下停车库及公共换乘空间工程主体为地下一层车库及换乘空间,局部设置夹层开发及停车空间,北接国铁B轴,向南至市政?-A轴,位于轨道交通两侧以及上方除设备用房范围的部分区域。结构东西长393m,南北宽196.5m。轨道交通地下结构预留空间首期开工部分?区南北长252m,东西宽73.4m,风道处局部宽226m。 2施工范围 本工程涉及的范围是津秦客专滨海站交通枢纽配套市政地下空间工程的首期开工部分。本工程形成畅通的交通线路,为工程施工管理服务。施工现场临建设施作为为整个工程施工服务的关键部分,其范围囊括到施工现场的每一个角落,各临建设施根据现场临建布置散布在施工场地内。 二、总体要求 1(质量:本工程参照《公路路基施工技术规范》、《公路水泥混凝土路面施工技术规范》、《公路工程质量检验评定标准》等的要求进行施工检验; 1)施工队必须配备相关测量、试验专职人员各一名; 2)配备测量仪器全站仪、水准仪,试验检测设备达到可环刀法测压实度、贝克曼梁法测弯沉条件;素土、8%石灰土标准击实及水泥混凝土路面混凝土强度、抗折强度试验,由施工队负责外委; 3)路基要求,零填挖段及挖方段,50cm开槽处理,分两层填筑8%石灰土,压实度要求分别为92%、94%,填方段及回填沟渠段落路基分层压实,路床压实度要求92%以上,石灰土层压实度要求94%以上。最终要求石灰土层弯沉值小于280(1/100mm),方可进行基层与面层施工。 2(安全:本工程要认真做好各项安全检查和安全准备工作,严格按照安全技术交底执行各项操作(具体见《安全技术交底》),确保本工程无一人员死亡、重伤事故及机械事故。 3.路线与纵断设置说明: 1)本工程为施工便道,以规划MATCH_ word word文档格式规范word作业纸小票打印word模板word简历模板免费word简历 _1714941453374_1为总体原则。现场若必要可进行路线及纵断的调整,但要做好记录; 2)现场路基施工做好同项目部、监理单位、业主单位、第三方测量及咨询单位的工程量签认工作,做好施工记录及相应质保 资料 新概念英语资料下载李居明饿命改运学pdf成本会计期末资料社会工作导论资料工程结算所需资料清单 ; to the keel, ensure the joist space to meet design requirements. In addition, check for coating release agent, Panel clean or not, no templates with dirt on the wall. According to the template install spell number ... Structures in fair-faced concrete construction process must use the same manufacturer in the same variety of admixture and admixture of the same manufacturer in the same fineness. Concrete mixer control of concrete mixing time of fair-faced concrete mixing forced mixer should be used, and the extension of time than normal concrete mixing 20~30S. Into concrete, by testing the slump, Visual concrete surface color, no bleeding and segregation, and completes the record. Mixer should drain the barrel of water after each cleaning to avoid affecting the water cement ratio. Concrete mix pour from a stirring end to the construction site should be less than 1.5 hours, in the pouring process, adding unexpected water mix or additive is prohibited. Before the reinforcement reinforcement must first clean up the bar, keep clean, no obvious rust stains. Tie wire reinforcement should be using rust-proof zinc-coated steel wire, tie all steel wire head 3)现场沟渠及水坑回填前,做好勘测及工程量签认工作,抛石挤淤为60cm作为垫底,工程量通过材料量严格控制,避免出现增量。 4.施工设备数量 序规格型号机械名称 数量 用途 备注 号 (建议) 1 压路机 YZK22 3台 地基压实,便道铺筑 2 推土机 TY220 6台 场地平整、便道铺筑 3 挖掘机 日立-5 8台 便道铺筑、硬化破除 4 铧犁 3个 翻拌灰土 5 平地机 PY180 1台 5 旋耕起垄机 3台 翻拌灰土 6 自卸汽车 25吨 24辆 材料运输 7 混凝土罐车 10方 15台 混凝土浇筑 场地硬化 8 插入式振捣棒 φ30 15台 混凝土振捣 4台备用 9 平板式振动器 2kW 8台 混凝土振捣 2台备用 10 抹面机 3台 抹面 11 振捣梁 5米 3部 12 铝合金刮杠 3米 6个 三、施工工艺与质量技术交底 1、结构设计: (1)面层:上面层采用25cm厚C30抗折水泥混凝土。 (2)路面基层:基层为15cm厚碎石。 (3)路基填筑:场内遵循以挖做填的原则,低填方段借用挖方段土方,并考虑路槽处理所需要增加的土方量。 (4)路槽处理:于原地面向下开槽50cm深,10.0m宽,用8%戗灰土填筑,分两层碾压密实。 (5)人行道:人行道宽度0.75m,采用25cm厚C30水泥混凝土板。 (6)排水沟:人行道靠基坑内侧做砖砌排水沟采用混凝土预制盖板,局部可采用钢筋焊制盖板。 to the keel, ensure the joist space to meet design requirements. In addition, check for coating release agent, Panel clean or not, no templates with dirt on the wall. According to the template install spell number ... Structures in fair-faced concrete construction process must use the same manufacturer in the same variety of admixture and admixture of the same manufacturer in the same fineness. Concrete mixer control of concrete mixing time of fair-faced concrete mixing forced mixer should be used, and the extension of time than normal concrete mixing 20~30S. Into concrete, by testing the slump, Visual concrete surface color, no bleeding and segregation, and completes the record. Mixer should drain the barrel of water after each cleaning to avoid affecting the water cement ratio. Concrete mix pour from a stirring end to the construction site should be less than 1.5 hours, in the pouring process, adding unexpected water mix or additive is prohibited. Before the reinforcement reinforcement must first clean up the bar, keep clean, no obvious rust stains. Tie wire reinforcement should be using rust-proof zinc-coated steel wire, tie all steel wire head 2、路基施工 1)施工过程控制 由于现场场地不平整,造成主便道投影位置不平整(以沿线实测原地面标高为准,顺接便道,纵坡坡度不超过规范要求)拟采用以挖作填,将路基分层碾压平整,分层压实厚度严禁超过25cm。 2)跨越水塘施工 由于施工场地较复杂,部分路段跨越水沟或水塘。这些特殊路段底层采用最短边大于30cm片石,用抛石挤於的方法在塘底填筑0.6m,上部选择含砼块和砖块在90%以上,含土量小于3%的拆楼房渣土填至水面以上0.5米,填筑放坡1:1。 3)施工流程 片石及房渣土施工: (1)材料要求: 施工过程中,片石采用最短边大于30cm的石灰岩。房渣土采用含砼块和砖块在90%以上,含土量小于3%的拆楼房渣土,挤淤换填。 (2)房渣土或测量放样 导线复测完毕后,对导线点及中桩进行加密,按照图纸进行抛投房渣土或片石的施工放样。即先按抛投片石或房渣土设计标高计算出抛投片石路段顶面的路基宽度,在坑埂上定出抛石路基顶面的边桩和路线中桩。 (3)抛投片石或房渣土 抛投的片石或房渣土尽量做到料径下大上小。用自卸汽车将料运至抛投现场边缘堆放(严禁直接向坑堰中直接倾倒),先用挖掘机进行分选抛投,即由挖掘机将大粒径的片石均匀分层抛投, 计划 项目进度计划表范例计划下载计划下载计划下载课程教学计划下载 抛投约0.6米厚片石垫底。再采用把拆楼房渣土堆放在坑边,然后用推土机沿道路纵向向坑渠内分层推进,当填至水面to the keel, ensure the joist space to meet design requirements. In addition, check for coating release agent, Panel clean or not, no templates with dirt on the wall. According to the template install spell number ... Structures in fair-faced concrete construction process must use the same manufacturer in the same variety of admixture and admixture of the same manufacturer in the same fineness. Concrete mixer control of concrete mixing time of fair-faced concrete mixing forced mixer should be used, and the extension of time than normal concrete mixing 20~30S. Into concrete, by testing the slump, Visual concrete surface color, no bleeding and segregation, and completes the record. Mixer should drain the barrel of water after each cleaning to avoid affecting the water cement ratio. Concrete mix pour from a stirring end to the construction site should be less than 1.5 hours, in the pouring process, adding unexpected water mix or additive is prohibited. Before the reinforcement reinforcement must first clean up the bar, keep clean, no obvious rust stains. Tie wire reinforcement should be using rust-proof zinc-coated steel wire, tie all steel wire head 上0.5米,由推土机将小粒径的房渣土推平嵌缝。按以上工序完成进占坑渠5米左右长度,再反复循环以上工序,直至填筑到坑渠对岸。 为了增加挤淤效果,抛填采用推土机和挖掘机配合进行,方法为纵向进占法。挤淤从路基中心呈等腰梯形向前和两侧抛填至路基宽度,使淤泥及软土向两侧挤出。抛投至水面以上50cm后即可进行碾压。 (4)碾压 首先依靠自重较大的推土机来回走动进行预碾压,使大块料石嵌固稳定,并路基沉入淤泥下承载层,进行补料再次采用推土机进行碾压。待路基面初步密实平整,作业面展开后,先用22t的振动式压路机静压2遍,再振动碾压3遍。碾压过程中,用人工将片石空隙以碎石或石屑填满铺平,直至抛料层顶面平整无明显孔隙。 (5)检测 压实度检测采用沉降观测法。在检测路段选择检测点,用白灰做出明显标记,先记录初始高程,然后用压路机振动压实2遍后,再观测检测点的高程,如前后两次检测点高程差在5mm以内,可判定沉降稳定,压实度满足要求。检验合格后方可进行下到工序施工。如检验后不符要求,查明原因,采取措施或继续碾压,直到合格。 (6)石灰土填筑 待下部块石料碾压并检测合格后方可进行路床8%石灰土分二层水平填筑。分层每层25cm,先用压路机静压2遍再振压2~3遍,压实度需达到94%,达不到要求的路段需进行补压。 3路槽处理 本工程道路的采用下部50cm厚掺8%石灰的石灰土层。 1)施工流程 施工准备?测量放样?推土整平?摊石灰?拌和?整平?压实 2)施工过程控制 (1)层数确定: 8%石灰土层厚度50cm,分两层施工,每层厚度为25cm。 (2)整平: 根据设计高程测量放样,用挖掘机配合推土机平整路床,多余料土放置路基两侧,留出一层厚的土在路基上作为第一层灰土料,并整平路面。 (3)布放石灰: 按照计算,用石灰定出方格网,并按比例要求将石灰堆于方格中(布放石灰人员应穿长裤,长袖工作服,带口罩工作等,布放人员后退撒灰),并用铁铲将石灰撒匀。 to the keel, ensure the joist space to meet design requirements. In addition, check for coating release agent, Panel clean or not, no templates with dirt on the wall. According to the template install spell number ... Structures in fair-faced concrete construction process must use the same manufacturer in the same variety of admixture and admixture of the same manufacturer in the same fineness. Concrete mixer control of concrete mixing time of fair-faced concrete mixing forced mixer should be used, and the extension of time than normal concrete mixing 20~30S. Into concrete, by testing the slump, Visual concrete surface color, no bleeding and segregation, and completes the record. Mixer should drain the barrel of water after each cleaning to avoid affecting the water cement ratio. Concrete mix pour from a stirring end to the construction site should be less than 1.5 hours, in the pouring process, adding unexpected water mix or additive is prohibited. Before the reinforcement reinforcement must first clean up the bar, keep clean, no obvious rust stains. Tie wire reinforcement should be using rust-proof zinc-coated steel wire, tie all steel wire head (4)拌和: 第一层用铧犁由边至中翻拌约2~3遍,翻拌时要反复观察翻拌深度,不能有夹层或翻拌太深。做上两层石灰土时,提前两天对路床两侧土料做戗灰处理,每次戗拌前测量预计拌合土方量,用石灰撒线,明确拌灰范围、拌合深度,并明确所需拌入石灰量,做到数据准确,保证戗灰量满足要求且拌合均匀,采用挖掘机翻拌,拌合过程中安排专人值班,全过程监控,并安排专门的试验人员进行灰剂量检测,确定是否满足要求。路边戗灰料须经至少2d闷料。 每一层灰土铺平后再用旋耕起垄机翻拌两遍,直至石灰土色泽均匀,无夹生,再用人工放线整平,同时检查其标高,标高应达到设计要求。施工过程中如若发现石灰拌合比例不均匀或不足时,在翻拌过程中需用人工添加灰土。翻拌完成后用推土机配合找平。 (5)压实: 拌合完成后,先采用12t振动压路机中速重叠1/3静压两遍,再用低速重叠1/3振压两遍,直至达到规范要求压实度。压路机后轮必须超过两不同工作段的接缝处。自检人员跟踪检验,对局部压实不足者及时补压。 (6)检测 在施工过程中每层灰土层碾压完毕后需用环刀法进行压实度检测,压实系数需达到94%后再进行下道工序施工。 3)质量标准 (1)石灰质量应符合设计要求,块灰需经充分消解才能使用; (2)石灰和土的比例应按设计要求控制准确,未消解的生石灰块必须剔除; (3)混合料应处于比最佳含水量大1%~2%个点时,用压路机碾压致要求的压实度(压实度为94%); 项次 检查项目 规定值或允许偏差值 检查方法和频率 1 压实度(%) 路床大于92%,石灰土层环刀法或灌砂法,每 94% 200m检查4处 2 弯沉(1/100mm) 小于280 贝克曼梁,填方、零填 挖及回填段各抽查 100m,两车道检测 3 宽度 大于10米 尺量,200m测4处 4 平整度(mm) 20 3m直尺,200m2处 5 横坡(%) 设计2%,偏差?0.5cm 水准仪,200m测4处 6 边坡 ?1:1.0 尺量:200m4处 4)应注意的质量问题 (1)、为防止含水量高时造成表面弹软,过低时造成表面松散,施工时应加强对碾压前含水量的控制,拌合前应对土、石灰等含水量进行检测,严格控制碾压前料土的含水量。 to the keel, ensure the joist space to meet design requirements. In addition, check for coating release agent, Panel clean or not, no templates with dirt on the wall. According to the template install spell number ... Structures in fair-faced concrete construction process must use the same manufacturer in the same variety of admixture and admixture of the same manufacturer in the same fineness. Concrete mixer control of concrete mixing time of fair-faced concrete mixing forced mixer should be used, and the extension of time than normal concrete mixing 20~30S. Into concrete, by testing the slump, Visual concrete surface color, no bleeding and segregation, and completes the record. Mixer should drain the barrel of water after each cleaning to avoid affecting the water cement ratio. Concrete mix pour from a stirring end to the construction site should be less than 1.5 hours, in the pouring process, adding unexpected water mix or additive is prohibited. Before the reinforcement reinforcement must first clean up the bar, keep clean, no obvious rust stains. Tie wire reinforcement should be using rust-proof zinc-coated steel wire, tie all steel wire head (2)、为防止石灰土拌合不均匀,应根据具体情况对石灰或土进行过20mm的方孔筛处理,并严格控制含水量。 4、 路面基层:碎石基层施工 1)路面基层碎石厚15cm,不分层施工。 (1)作用:碎石层是硬质路面和土质路基的过渡层,它有效的和路面及路基结合,形成一个有机体。具有一定的强度和刚度。高于路基低于路面,既保证铺设路面一定厚度,满足承载负荷,又能减少建设成本。可将路面承受的车辆荷载均衡的扩散到路基,具有一定的韧性。碎石粗沙有良好的滤水性,可减少路基积水而使其承载能力下降。 (2)材料要求: 采用购买成品碎石,进行填筑。碎石采用轧制碎石粒径筛分后按比例拌合的,岩性采用石灰岩。 级配满足规范二级以下公路的级配要求,压碎值大于26%,针片状颗粒含量小于20%,碎石中不应有粘土快,植物等有害颗粒。 碎石的颗粒组成范围 通 适 用 公 过 路 质 等 级 量 百 二级和二级以下公路 分 率 (项%目 ) 37.5 100 筛 31.5 90~100 19.0 73~88 孔 9.5 49~69 4.75 29~54 尺 2.36 17~37 0.6 8~20 寸(mm) 0.075 0~7 液限(%) ,28 塑性指数 ,6(或9) 2)工艺流程 施工准备?测量放样?预埋管线?碎石运输?平地机布料、整平和摊铺机摊铺?碾压 3)操作工艺 ? 测量放线 在路床上恢复道路中线,中线段每20m设一中桩,平曲线段每10,15m测放一中桩,平曲线段每10m设高程桩。并测设路基边桩,标示出基层面设计高程。摊铺机作业时,4~6m放置桩撅,并依据钢丝线及摊铺厚度测设桩撅顶标高,控制设计标高。 ? 碎石运输 to the keel, ensure the joist space to meet design requirements. In addition, check for coating release agent, Panel clean or not, no templates with dirt on the wall. According to the template install spell number ... Structures in fair-faced concrete construction process must use the same manufacturer in the same variety of admixture and admixture of the same manufacturer in the same fineness. Concrete mixer control of concrete mixing time of fair-faced concrete mixing forced mixer should be used, and the extension of time than normal concrete mixing 20~30S. Into concrete, by testing the slump, Visual concrete surface color, no bleeding and segregation, and completes the record. Mixer should drain the barrel of water after each cleaning to avoid affecting the water cement ratio. Concrete mix pour from a stirring end to the construction site should be less than 1.5 hours, in the pouring process, adding unexpected water mix or additive is prohibited. Before the reinforcement reinforcement must first clean up the bar, keep clean, no obvious rust stains. Tie wire reinforcement should be using rust-proof zinc-coated steel wire, tie all steel wire head 集料装车时,应控制每车料的数量基本相等。 ?根据路基的宽度、厚度及设计干密度计算各段需要的集料数量,并计算料堆的堆放距离。卸料 时应严格控制料堆距离。 ? 预埋管线 排水沟在穿主便道段,采用预埋DN300预制钢筋混凝土平口管,埋设在碎石层下。 在碎石摊铺前需提前对穿过便道的管线按照要求预埋在灰土层中,并用人工将埋设管线的虚土夯实。管线上碎石严禁重型振动压路机碾压,采用振动夯压实,避免损坏埋设在下面的管线。待混凝土路面浇筑并养生完成,方可开放重交通。 ? 摊铺、整平 1) 卸料后及时用推土机将混合料均匀摊铺,表面力求平整。 2) 用平地机将碎石按横坡进行整平和整型,在整型过程中应注意消除离析现象。 3) 用压路机在已初平的路段上快速碾压一遍,以暴露潜在的不平整,并采用平地机进行精平。 ? 碾压 ?当碎石铺筑完成后,立即用压路机静压2遍,再用22t振动压路机振压5遍。 ?直线和不设超高的平曲线段,由两侧路肩开始向路中心碾压;在设超高的平曲线段,由内侧路肩向外侧路肩进行碾压。 ?碾压时,后轮必须超过两段的接缝处。后轮压完路面全宽时,即为一遍。碾压一直进行到规定的压实度为止。终压时静压2遍,使表面无明显轮迹。压路机的碾压速度宜先慢后快,头两遍采用1.5~1.7km/h,之后采用2.0~2.5 km/h,路面的两侧应多压2~3遍。 ?严禁压路机在已完成的或正在碾压的路段上调头或急刹车。 ?碾压应符合下列规定: 1) 碾压时的含水量宜在最佳含水量的允许偏差范围内。 2) 直线和不设超高的平曲线段,应由两侧向中心碾压;设超高的平曲线 段,应由内侧向外侧碾压。 3) 初压时,碾速宜为 20,3Om,min,灰土初步稳定后,碾速宜为 30,40m/min。 4)碾压前和碾压中应适量洒水。 5)碾压中有过压现象的部位,应进行换填处理。 ? 季节性施工 ? 雨期施工时注意及时收听天气预报,并采取相应的排水措施,以防雨水进入路面基层,冲走基层表面的细粒土,从而降低基层强度。 ? 雨期施工期间应随铺随碾压,当天碾压成活。 to the keel, ensure the joist space to meet design requirements. In addition, check for coating release agent, Panel clean or not, no templates with dirt on the wall. According to the template install spell number ... Structures in fair-faced concrete construction process must use the same manufacturer in the same variety of admixture and admixture of the same manufacturer in the same fineness. Concrete mixer control of concrete mixing time of fair-faced concrete mixing forced mixer should be used, and the extension of time than normal concrete mixing 20~30S. Into concrete, by testing the slump, Visual concrete surface color, no bleeding and segregation, and completes the record. Mixer should drain the barrel of water after each cleaning to avoid affecting the water cement ratio. Concrete mix pour from a stirring end to the construction site should be less than 1.5 hours, in the pouring process, adding unexpected water mix or additive is prohibited. Before the reinforcement reinforcement must first clean up the bar, keep clean, no obvious rust stains. Tie wire reinforcement should be using rust-proof zinc-coated steel wire, tie all steel wire head 4)质量要求 1、应选用质地坚韧、无杂质的碎石,级配应符合要求; 2、12t以上压路机碾压无明显痕迹,表面平整密实,边线整齐,无松散。 项次 检查项目 规定值或允许偏差值 检查方法和频率 12t以上压路机碾压无1 压实度(%) 200米每车道2处 明显痕迹 2 宽度 压实处大于9.25米 尺量,200m测4处 刨验,尺量,每200m测3 厚度 15cm,偏差,10mm 4个断面 5)应注意质量问题 施工时自卸汽车倾倒速度要慢,应使混合料缓缓落下,若在摊铺时局部有粗细集料离析严重时,应更换材料,以消除因离析造成的基层强度降低。 5、面层施工 本工程采用25cm厚C30抗折混凝土面层,混凝土采用商品混凝土,施工前做好配合比复试审批,要求砼抗压强度大于30MPa,抗折强度大于4.5MPa。人行道与行车道一起施工,路面面层采用半幅施工的施工方法,未施工的半幅在铺垫碎石后可保障运输车通行,确保施工生产持续。 1 )工艺流程 测量放线?模板制作安装?铺撒薄层水泥?混凝土搅拌、运输?铺筑混凝土?混凝土振捣、整平?混凝土抹面、压实?养生?切缝、清缝、灌缝 2 ) 操作工艺 ?测量放线 根据便道平面布置图放出道路中线和边线。除在道路中线上每30m设一中线桩外,并在中线桩两侧相应位置设置边桩。主要控制桩应设在路旁稳定的位置,其精度应符合有关规定。在离道路边线适当位置每l00m设一个临时水准点,以便施工中对路面高程进行复核。 ?模板制作、安装 ?制作:采用槽钢作施工便道砼浇筑模板。 ?安装:将模板按放线位置支立立模的平面位置与高程,应符合设计要求,并应支立稳固,接头紧密平顺,不得有前后错茬和高低不平等现象。模板与基层接触处不得漏浆。两侧用铁撅钉牢并紧靠模板,内侧铁撅应高于模板(约l00mm),间距0.8m,1.0m,外侧铁撅顶应与模板同高或低l0mm。弯道处铁撅应加密,间距为0.4m,0.8m。模板支好后,内侧均匀涂刷隔离剂。 ?混凝土的运输 to the keel, ensure the joist space to meet design requirements. In addition, check for coating release agent, Panel clean or not, no templates with dirt on the wall. According to the template install spell number ... Structures in fair-faced concrete construction process must use the same manufacturer in the same variety of admixture and admixture of the same manufacturer in the same fineness. Concrete mixer control of concrete mixing time of fair-faced concrete mixing forced mixer should be used, and the extension of time than normal concrete mixing 20~30S. Into concrete, by testing the slump, Visual concrete surface color, no bleeding and segregation, and completes the record. Mixer should drain the barrel of water after each cleaning to avoid affecting the water cement ratio. Concrete mix pour from a stirring end to the construction site should be less than 1.5 hours, in the pouring process, adding unexpected water mix or additive is prohibited. Before the reinforcement reinforcement must first clean up the bar, keep clean, no obvious rust stains. Tie wire reinforcement should be using rust-proof zinc-coated steel wire, tie all steel wire head ?混凝土的运输采用搅拌运输车运输。混凝土从搅拌机出料后,运至铺筑地点进行铺筑、振捣直至成活的允许最长时间,由试验室根据水泥初凝时间及施工气温确定,并应符合下表规定。 混凝土从搅拌机出料至成活的允许最长时间 施工气温(?) 允许最长时间(h) 5~9 2 10~19 1.5 20~29 1.25 30~35 1 ?装运混凝土拌合物,不得漏浆;并应防止离析。夏季施工时敞开的料斗车运输时应采取遮盖措施。出料及铺筑时的卸料高度,不应超过1.5m。 ?运输工具的数量应满足施工需要并稍有富余 ?铺撒水泥薄层 为了使砼路面与碎石基层有效粘结,并减少混凝土中水泥浆的流失,在砼路面浇筑前需在碎石基层上 2人工铺撒水泥薄层。水泥薄层采用PO42.5水泥,铺撒量为10kg/m。水泥薄层需均匀平整。 ?铺筑混凝土 ?混凝土板块应结合混凝土拌合站的生产能力,按顺序进行分格、分幅施工,每格为30m。 ?混凝土拌合物铺筑前,应对模板支撑、基层的平整、润湿情况等进行全面检查。 ?混凝土卸料时应从模板一端入模卸料。 ?混凝土不分层铺筑,采用一次性铺筑, 铺筑虚厚一般高出模板15mm,25mm。 ?混合料铺筑至板厚的2/3时即可拔出模内铁撅。 ?铺筑工作须在分缝处结束,不得在一块板内有接茬。 ?混凝土的振捣、整平 ?混凝土拌合物的振捣 1)混凝土板,靠边角应先用插入式振捣器顺序振捣,再用平板振捣器纵横交错全面振捣。纵横振捣时,应重叠l00mm,200mm,然后用平板振捣器振捣拖平。 2)振捣器在每一位置振捣持续时间,应以拌合物停止下沉、不再冒气泡并泛出水泥砂浆为准。 3)当采用插入式与平板式振捣器配合使用时,应先用插入式振捣器振捣,后用平板式振捣器振捣。插入式振捣器的移动间距不应大于其作用半径的0.5倍,其至模板的距离不应大于振捣器作用半径的0.5倍。 to the keel, ensure the joist space to meet design requirements. In addition, check for coating release agent, Panel clean or not, no templates with dirt on the wall. According to the template install spell number ... Structures in fair-faced concrete construction process must use the same manufacturer in the same variety of admixture and admixture of the same manufacturer in the same fineness. Concrete mixer control of concrete mixing time of fair-faced concrete mixing forced mixer should be used, and the extension of time than normal concrete mixing 20~30S. Into concrete, by testing the slump, Visual concrete surface color, no bleeding and segregation, and completes the record. Mixer should drain the barrel of water after each cleaning to avoid affecting the water cement ratio. Concrete mix pour from a stirring end to the construction site should be less than 1.5 hours, in the pouring process, adding unexpected water mix or additive is prohibited. Before the reinforcement reinforcement must first clean up the bar, keep clean, no obvious rust stains. Tie wire reinforcement should be using rust-proof zinc-coated steel wire, tie all steel wire head 4)振捣时应辅以人工找平,并应随时检查模板。如有下沉、变形或松动,应及时纠正。 ?混凝土拌合物整平 1)填补板面应选用碎石较细的混凝土拌合物,严禁用纯砂浆填补找平。 2)填补板面后,再用平板振捣器全幅粗平。避免平板振捣器振离模板,并保持同步缓慢匀速前进,振捣前积料过多时应及时清除,凹处及时补足振实,平板振捣器往返振捣2~3遍,达到表面平整、均匀、不露石子为度。 3)在前部振捣密实的基础上,由于振捣时人员作业踩踏混凝土面,为保障整面平整密实,采用5米自制振捣梁,进行振捣。 振捣梁两端架于槽钢上作为轨道,采用5人人力进行拖拽,速度控制在4m/min左右。后采用3米长铝合金刮杠进行大面整平,整平时施工人员在两端置于槽钢上的跳板上进行作业,避免踩踏混凝土面。 ?混凝土抹面、压实 1)修整时应清边整缝,清除粘浆,修补掉边、缺角。 抹面 2)吸水完成后立即用粗抹光机抹光。边角等局部抹光机打磨不到之处可用微型手动抹光器抹光,将凸出石子或不光之处抹平。最后用靠尺板检查路面平整度,符合要求后用铁抹子人工抹光。 ?沉降缝 混凝土路面施工时每隔30米设置一道横向沉降缝。因半幅施工中间设通长沉降缝,在混凝土浇筑时与前一格之间预埋1.5cm厚沥青软木板,沥青软木板在支模时立放在槽钢内侧,用Φ8钢筋卡进行固定。在30米格内每隔10米做切割缝。 ?砼路面缩缝 为保障混凝土面在温度应力及收缩的影响下产生大量不规则裂缝,10米设置一道横向路面缩缝,为裂缝位置进行引导。 横向缩缝切割:横向施工缝采用混凝土切割机进行锯缝,缝深6cm,宽5mm。切割时必须保持有充足的注水,在进行中要观察刀片注水情况。 (8)灌缝 在锯缝处浇灌聚氯乙烯胶泥或沥青膏。灌缝前应清除缝内的临时密堵材料,缝顶面高度与路面平齐。 (9)养生 ?土工布面洒水养生 1)当混凝土表面不见浮水和用手指压无痕迹时,应进行喷洒。 2)喷洒厚度宜以能形成薄膜为度。 to the keel, ensure the joist space to meet design requirements. In addition, check for coating release agent, Panel clean or not, no templates with dirt on the wall. According to the template install spell number ... Structures in fair-faced concrete construction process must use the same manufacturer in the same variety of admixture and admixture of the same manufacturer in the same fineness. Concrete mixer control of concrete mixing time of fair-faced concrete mixing forced mixer should be used, and the extension of time than normal concrete mixing 20~30S. Into concrete, by testing the slump, Visual concrete surface color, no bleeding and segregation, and completes the record. Mixer should drain the barrel of water after each cleaning to avoid affecting the water cement ratio. Concrete mix pour from a stirring end to the construction site should be less than 1.5 hours, in the pouring process, adding unexpected water mix or additive is prohibited. Before the reinforcement reinforcement must first clean up the bar, keep clean, no obvious rust stains. Tie wire reinforcement should be using rust-proof zinc-coated steel wire, tie all steel wire head 3)养生期间应保护土工布完整。当破裂不能覆盖混凝土时应立即修补。混凝土在养生期间和填缝前 应禁止车辆通行。在达到设计强度的40%以后,方可允许行人通行。 4)养生时间根据混凝土强度增长情况而定,一般为14~21d,混凝土达到设计强度时(暂定30d,根 据环境温度可适当调整),可允许开放交通。 ?模板的拆除 拆模时间应根据气温和混凝土强度增长情况确定,采用普通水泥时,一般允许拆模时间应符合 下表规定。 混凝土板允许拆模时间 昼夜平均气温(?) 允许拆模时间(h) 5 72 10 48 15 36 20 30 25 24 30以下 18 注:允许拆模时间为自混凝土成型后至开始拆模时的间隔时间。 ?拆模应仔细,不得损坏混凝土板的边、角,尽量保持模板完好。 3) 质量要求 1)、基层质量必须符合规定要求,验算的基层整体模量应满足设计要求; 2)、水泥强度、物理性能和化学成分应符合国家标准及有关规定; 3)、粗细集料、水、及接缝填缝料应符合设计和施工规范要求; 4)、面层与其他构造物相接应平顺,路面坡度按设计规范施工,路面及边缘无积水现象。 项次 检查项目 规定值或允许偏差值 检查方法和频率 试验,100m一处及每两1 抗折强度 4.5Mpa 次浇筑 水准仪测基层及面层标2 板厚度 大于250mm,偏差-10mm 高,200m每车道2处 3 宽度 大于9米,?20mm 尺量,200m测4处 4 平整度(mm) 20 3m直尺,200m2处 5 横坡(%) 设计2%,偏差?0.25cm 水准仪,200m测4处 纵缝20米拉线,每6 纵横缝顺直度(mm) 10 200m4处,横缝沿板宽拉 线每200m4条 抽量,每200m抽纵横缝7 相邻板高差(mm) 3 各两条,每条2点 4 )外观鉴定 1、混凝土板表面的脱皮、印痕、裂纹和缺边掉角等病害现象的缺陷面积不得超过总面积的0.3%; 2、接缝填筑饱满密实,不得污染路面。 to the keel, ensure the joist space to meet design requirements. In addition, check for coating release agent, Panel clean or not, no templates with dirt on the wall. According to the template install spell number ... Structures in fair-faced concrete construction process must use the same manufacturer in the same variety of admixture and admixture of the same manufacturer in the same fineness. Concrete mixer control of concrete mixing time of fair-faced concrete mixing forced mixer should be used, and the extension of time than normal concrete mixing 20~30S. Into concrete, by testing the slump, Visual concrete surface color, no bleeding and segregation, and completes the record. Mixer should drain the barrel of water after each cleaning to avoid affecting the water cement ratio. Concrete mix pour from a stirring end to the construction site should be less than 1.5 hours, in the pouring process, adding unexpected water mix or additive is prohibited. Before the reinforcement reinforcement must first clean up the bar, keep clean, no obvious rust stains. Tie wire reinforcement should be using rust-proof zinc-coated steel wire, tie all steel wire head 5 、排水沟施工 1).概况 在施工便道单侧设置矩形混凝土排水沟,排水沟深40cm宽30cm,盖板面比路面低1.5cm,排水沟采用砖砌24墙排水沟,盖板采用C30混凝土浇筑,混凝土保护层未在图上标明的均为3cm,。具体布置见施工便道标准横断面图和排水沟横断面结构图。北广场附近排水沟接连至水渠,南广场便道在路势低处附近做三口沉淀池,排水沟连接到沉淀池,沉淀池最终连通施工场内排水管网。 2).工艺流程 施工准备?测量放样?基槽开挖?铺设砂砾垫层?浇筑底板?砌砖?预制盖板安装?洒水养生 (1).施工准备 先进行场地清理,修整边坡使砌筑地带的标高和边坡与要求一致,槽底夯实平整,基础稳定,施工材料符合要求。 (2).测量放样 结合实际地形情况对排水沟进行放样,用导线桩测定沟槽的中心线,在沟槽的起点、终点和转角处,按测量精度准确定出排水沟的平面位置,用白灰放出基槽边线。 (3).基槽开挖 测量放样后标高和边坡与要求一致,槽底开挖宽度等于排水沟结构基础宽度加两侧工作面宽度,每侧工作面宽度应不小于300mm。用机械开挖沟槽后,当天不能进行下一道工序作业时,沟底应留出200mm左右的一层土不挖,等下道工序时采用人工修整基槽并清底夯实。 沟槽开挖时土方应堆在沟槽的一侧,并保持与沟槽边缘不小于100cm距离,堆土高度应小于150cm,以便于下道工序作业。 (4).铺设砂垫层 在人工修整后的基槽内碎石10cm厚93cm宽,砂砾的质量符合规范要求,铺设厚度保持均匀一致,线形达到设计要求。 (5).砂垫层铺设完毕后,需浇筑10cm厚88cm宽C30素混凝土垫层。 (6).砌砖 砌筑前每一块砖均应用干净水洗并使其彻底饱和,用M7.5水泥砂浆砌筑,砌筑时注意保持砖体的竖直、水平线性符合要求,砌筑完成后需抹2m厚水泥砂浆面。 (7).预制盖板安装 安装盖板时应注意盖板与排水沟的接合处应紧密。 (8).洒水养生 to the keel, ensure the joist space to meet design requirements. In addition, check for coating release agent, Panel clean or not, no templates with dirt on the wall. According to the template install spell number ... Structures in fair-faced concrete construction process must use the same manufacturer in the same variety of admixture and admixture of the same manufacturer in the same fineness. Concrete mixer control of concrete mixing time of fair-faced concrete mixing forced mixer should be used, and the extension of time than normal concrete mixing 20~30S. Into concrete, by testing the slump, Visual concrete surface color, no bleeding and segregation, and completes the record. Mixer should drain the barrel of water after each cleaning to avoid affecting the water cement ratio. Concrete mix pour from a stirring end to the construction site should be less than 1.5 hours, in the pouring process, adding unexpected water mix or additive is prohibited. Before the reinforcement reinforcement must first clean up the bar, keep clean, no obvious rust stains. Tie wire reinforcement should be using rust-proof zinc-coated steel wire, tie all steel wire head 将砌筑材料的残留物清除干净,同时不得损坏已形成的部分,如有脱落之处必须及时修整。洒水养生应根据气温情况,掌握恰当的时间间隔,养生期内保持表面湿润。 3)预制钢筋混凝土盖板 施工流程 钢筋制作与绑扎?模板支设?混凝土浇筑?拆模养生?盖板安装 (1)场地平整 预制盖板场地设在驻地,施工前需对场地按要求进行平整并夯实,并在上面铺撒3cm厚沙层。安装模板和浇筑前必须对预制盖板场地清扫干净。 (2)钢筋制作与绑扎 钢筋制作按照施工图纸设计下料,B10单根长80cm、B10单根长130cm,钢筋两侧做5cm长45?角弯钩;下料完成并加工后在现场进行钢筋网片绑扎,盖板下底保护层净厚为4cm,用预制混凝土垫块进行衬垫,两侧保护层为3cm厚。 (3)模板支设 本路段人行道盖板,断面尺寸130cm×76cm×10cm,模板采用10cm×10cm楞木作为预制盖板的模板,模板用钢钎加以固定。盖板两端留有1.5cm宽30cm长的槽口。盖板的孔可用直径4cm的木柱做预留件,浇筑前需按设计要求设置好并固定牢固。 (4)盖板混凝土浇筑 预制盖板混凝土设计强度为C30,混凝土拌和时,坍落度宜控制好适宜范围,经专业监理工程师验收合格后进行混凝土浇筑;浇筑前在施工面铺一层塑料布,并在塑料布上面和模板内侧涂刷脱模剂。铺筑混凝土时虚厚一般高出模板10mm,15mm,然后再用平板振捣器振捣整平。 4).拆模养生 在混凝土浇筑完成第二天且砼强度达到2.5MPa后,方可进行模板拆除工作,模板拆除时应轻缓进行,避免发生棱角掉落现象;模板拆除后及时用土工布覆盖并洒水养生,养生周期一般为7天。 5)盖板安装 预制钢筋混凝土排水沟沟盖板安装采用人工进行安装。安装时注意施工安全和文明施工。 to the keel, ensure the joist space to meet design requirements. In addition, check for coating release agent, Panel clean or not, no templates with dirt on the wall. According to the template install spell number ... Structures in fair-faced concrete construction process must use the same manufacturer in the same variety of admixture and admixture of the same manufacturer in the same fineness. Concrete mixer control of concrete mixing time of fair-faced concrete mixing forced mixer should be used, and the extension of time than normal concrete mixing 20~30S. Into concrete, by testing the slump, Visual concrete surface color, no bleeding and segregation, and completes the record. Mixer should drain the barrel of water after each cleaning to avoid affecting the water cement ratio. Concrete mix pour from a stirring end to the construction site should be less than 1.5 hours, in the pouring process, adding unexpected water mix or additive is prohibited. Before the reinforcement reinforcement must first clean up the bar, keep clean, no obvious rust stains. Tie wire reinforcement should be using rust-proof zinc-coated steel wire, tie all steel wire head 6、季节性施工 1 )雨期施工 (1)铺筑中遭遇阵雨时,应立即停止铺筑,并使用防雨篷或塑料薄膜覆盖尚未硬化的混凝土路面。 (2)被阵雨轻微冲刷过的路面,视平整度和抗滑构造破损情况,采用硬刻槽或先磨平再刻槽的方法处理。 对被暴雨冲刷后,路面平整度严重损坏的部位,应尽早铲除重铺。 2)高温期施工 to the keel, ensure the joist space to meet design requirements. In addition, check for coating release agent, Panel clean or not, no templates with dirt on the wall. According to the template install spell number ... Structures in fair-faced concrete construction process must use the same manufacturer in the same variety of admixture and admixture of the same manufacturer in the same fineness. Concrete mixer control of concrete mixing time of fair-faced concrete mixing forced mixer should be used, and the extension of time than normal concrete mixing 20~30S. Into concrete, by testing the slump, Visual concrete surface color, no bleeding and segregation, and completes the record. Mixer should drain the barrel of water after each cleaning to avoid affecting the water cement ratio. Concrete mix pour from a stirring end to the construction site should be less than 1.5 hours, in the pouring process, adding unexpected water mix or additive is prohibited. Before the reinforcement reinforcement must first clean up the bar, keep clean, no obvious rust stains. Tie wire reinforcement should be using rust-proof zinc-coated steel wire, tie all steel wire head (1)当现场气温大于等于35?时,应避开中午高温时段施工,可选择在早晨、傍晚或夜间施工。 (2)砂石料堆应有遮阳棚。模板和基层表面,在浇筑混凝土前应洒水湿润。 (3)混凝土拌合物浇筑中应尽量缩短运输、铺筑、振捣、压实成活等工序时间,浇筑完毕应及时覆盖、养生。 (4)切缝应视混凝土强度的增长情况,宜比常温施工适当提早切缝,以防断板。特别是在夜间降温幅度较大或降雨时,应提早切缝。 7.成品保护 ? 混凝土板在养护期间和填缝前,应禁止车辆通行。在达到设计强度的40%以后,方可允许行人通行。在路面养生期间,平交道口应搭建临时便桥。面板达到设计抗弯拉强度后,方可开放交通。 ?分幅施工时如遇雨季,应采取必要的排水措施,防止未铺筑增幅路基受水浸泡。 8. 应注意的质量问题 ?为防止混凝土板块裂缝或断板,应对混凝土板在成活后,及时覆盖养生,养生期间必须经常保持湿润,绝对不得暴晒或风干,养生时间一般不应少于14d;加强对路基和基层施工时密实度、稳定性、均匀性的检查;控制拌制混凝土所用原材料,特别是水泥的技术指标;混凝土振捣时,防止漏振或过振。 ? 为防止路面板缺棱掉角,应控制切缝时间,保证混凝土达到一定强度再进行切割作业;控制切缝深度,严格按设计深度进行切割。 交 底 人 参 加 人 注:施工组织设计交底及分项、分部工程交底。 年 月 日 to the keel, ensure the joist space to meet design requirements. In addition, check for coating release agent, Panel clean or not, no templates with dirt on the wall. According to the template install spell number ... Structures in fair-faced concrete construction process must use the same manufacturer in the same variety of admixture and admixture of the same manufacturer in the same fineness. Concrete mixer control of concrete mixing time of fair-faced concrete mixing forced mixer should be used, and the extension of time than normal concrete mixing 20~30S. Into concrete, by testing the slump, Visual concrete surface color, no bleeding and segregation, and completes the record. Mixer should drain the barrel of water after each cleaning to avoid affecting the water cement ratio. Concrete mix pour from a stirring end to the construction site should be less than 1.5 hours, in the pouring process, adding unexpected water mix or additive is prohibited. Before the reinforcement reinforcement must first clean up the bar, keep clean, no obvious rust stains. Tie wire reinforcement should be using rust-proof zinc-coated steel wire, tie all steel wire head
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