基础底板大体积混凝土施工方案高枧乡

四川省拉拉铜矿经济适用住房（二标段）工程筏板大体积混凝土施工方案四川省凉山州恒利建筑有限责任公司司四川省拉拉铜矿经济适用住房（二标段）工程筏板大体积混凝土施工方案四川省凉山州恒利建筑有限责任公司司目录方案报审表·····························1方案会签表·····························2目录································3一、编制依据····························6二、工程概况·······················································71.工程情况·························································72.气象条件························································73.工程水文地质条件·················································84.工程难点与重点··················································8三、施工准备······················································91.技术准备·························································92.机械设备准备····················································103.物资准备························································124.劳动力准备······················································125、其他准备···························13四、施工方法及技术措施············································141.工艺流程····························142.浇筑方法的选择·························143.混凝土的浇筑要求················································154.集水坑内混凝土的浇筑······················15四川省拉拉铜矿经济适用住房（二标段）工程筏板大体积混凝土施工方案四川省凉山州恒利建筑有限责任公司司5.地下室外墙导墙混凝土······················166.混凝土的振捣··························167.混凝土输送······················································168.底板防水混凝土浇筑··············································189.后浇带施工······················································2010.后浇带防水技术措施·············································2111.泌水处理····························23五、底板大体积混凝土的测温····················231.测温的意义···························232.测温管理制度··························243.混凝土测温养护··················································244.混凝土温控措施··················································255.测温注意事项··························28六、大体积混凝土裂缝控制计算······································28七、商品混凝土的运输·······················35八、混凝土的泵送·························361泵的选型····························362泵输送管配管布置原则······················363.泵送混凝土的浇筑························36九、质量标准···························381.原材······························382.试验······························38四川省拉拉铜矿经济适用住房（二标段）工程筏板大体积混凝土施工方案四川省凉山州恒利建筑有限责任公司司3.混凝土施工···························394.混凝土养护·····························40十、质量保证措施···················································401.确保工程质量的管理措施··········································402.混凝土的进场检验················································423.突发不能连续施工情况的应急措施··································424.成品保护······························43十一、安全及文明施工注意事项······································431.安全注意事项····················································432.文明施工注意事项················································45四川省拉拉铜矿经济适用住房（二标段）工程筏板大体积混凝土施工方案四川省凉山州恒利建筑有限责任公司司一、编制依据序号名称编号1本工程图纸、相关技术资料及施工现场实际情况2西昌市建筑勘测设计院3混凝土结构工程施工质量验收规范GB50204-20024混凝土质量控制标准GB50164-925商品混凝土质量管理规程DBJ01-6-906混凝土泵送施工技术规程JGJ/T10-957混凝土强度检验评定标准GBJ107-878混凝土结构试验方法标准GB50152-929硅酸盐水泥、普通硅酸盐水泥GB175-9910普通混凝土配合比设计规程JGJ55-200011普通混凝土用砂质量标准及检验方法JGJ52-9212混凝土外加剂应用技术规范GB50119-200313混凝土矿物掺合料应用技术规程DBJ/T01-64-200214预防混凝土结构工程碱集料反应规程DBJ01-95-200515地下工程防水技术规范GB50108—200116地下防水工程质量验收规范GB50208—200217建筑工程质量验收统一标准GB50300—2001四川省拉拉铜矿经济适用住房（二标段）工程筏板大体积混凝土施工方案四川省凉山州恒利建筑有限责任公司司18混凝土强度检验评定标准GBJ107—8719高层建筑箱型与筏形基础技术规程JGJ46—99二、工程概况1.工程情况1.1我单位承建的四川省拉拉铜矿经济适用房二标段工程由1、2#楼和附属用房组成，总建筑面积22811.66㎡，附属用房地下部分1325.6㎡,1、2#楼占地面积1042.2㎡.本工程位于西昌市顺河路,9度设防,室外地面相当于1539.000ｍ,地基持力层为地勘报告中的第四层稍密卵石层，地基承载力特征值为300Kpa，基础形式均为平板式筏形基础。附属用房地下一层为车库，地上一层为商用房，框架结构，建筑主体高度4.35ｍ，地下室各砼构件抗渗等级P6；1、2#楼为剪力墙结构，二十层，建筑主体高度58.3ｍ，房屋建筑总长度62.1ｍ,宽24.3ｍ。附属用房筏板基础厚0.8ｍ,底标高为-6.800ｍ,长49.600ｍ,宽33.1ｍ;1、2#楼筏板基础厚1.2ｍ,底标高为-4.800ｍ,长63.700ｍ,宽25.9ｍ.1.2地下水位为0.3~2.4m左右基础挖深约7.0ｍ若不采取喷锚护壁措施，放坡系数按1:1计算，开挖边线需在基础宽度外，另加5.2ｍ，即需在路上开挖2.2m，采用喷锚，则可采用1.05的放坡系数，即只需在路边0.2m开挖（喷锚支护方案祥专项方案）。深井降水方案见专项方案。1.3本工程基础为平板式筏形基础底板,属大体积混凝土.四川省拉拉铜矿经济适用住房（二标段）工程筏板大体积混凝土施工方案四川省凉山州恒利建筑有限责任公司司2.气象条件根据收集气象水文资料，该场地属亚热带大陆季风气候，其气象特征如下：2.1温度：年平均温度17.2℃。2.2降雨量：降雨量丰富，雨季集中在5～10月份，多年平均降雨量1013.1mm3.工程水文地质条件3.1工程地质条件由西昌市建筑勘测设计院提供的该场地岩土工程勘察报告知，该区域构造地表为第四系全新统冲积层，基底为白垩系上统灌口组砂泥层。地基土自上而下的结构为：①、杂填土：层厚0.5～3.20米。②、粉质粘土：层厚4～10.00米。③、粉土：层厚0.5～3.90米。④、卵石：地下埋深4.5～5.0米。3.2水文地质条件场地处于邛海盆地东河冲、洪积扇中部靠近前缘地带。地层以冲洪积相沉积的粉土及卵石层为主。场地地下水类型孔隙潜水，主要分布于粉土及卵石层的孔隙中。地下水主要接受大气降水、地表水及地下水流补给。勘探期为枯水期，孔内测得场地地下水位为0.30~2.4m。地下水位随季节变化，年变化幅度约1.00m左右。根据邻近场地的地下水及土样分析成果显示，该场地地下水及土对混凝土及钢筋混凝土结构具有微腐蚀性。场地内分布有长年积水鱼塘，且分布有一地下水露头，常年有地下水溢出，为当地居民饮用水源。部分控制性钻孔中也见有地下水从钻孔中溢出，地下水具有承压性。四川省拉拉铜矿经济适用住房（二标段）工程筏板大体积混凝土施工方案四川省凉山州恒利建筑有限责任公司司3.3地基土评价①、场地无断裂构造，地形起伏不大，无特殊不良地质，场地整体稳定。场地属Ⅱ类建筑场地，属可进行建设的一般性场地。②、21#设计持力层为粉土层，地基承载力特征值fspk≥280KPa；22#设计持力层为粉土层，地基承载力特征值fapk≥280KPa；③、基础开挖至设计标高后，若尚未到达指定持力层，则应继续下挖，超挖部分采用C15素混凝土回填。4.工程难点与重点、①施工期间应对噪声、灰尘进行妥善处理，以减少对周围环境的影响，外围用2000目以上的绿色安全网进行封闭处理，现场布置严格按总平面布置图进行施工，做到合理化、人性化。②基坑开挖必须分层开挖分层支护，挖土困难，必须规划好出土路线及开挖吮吸。③施工过程协调好土方和喷锚支护两分项工程的施工，做到密切配合，当天开挖的工作面当天完成，随挖随支，既有利于基坑安全，又有利于工程顺利进行。○4基坑监测是本工程施工的重要一环，施工过程应做好监测工作，采取信息化施工，随时掌握基坑情况，保证施工安全。三、施工准备1.技术准备1.1有关人员熟悉图纸，掌握底板结构布置、施工进度安排等情况，确定混凝土浇筑流向和浇筑方法。严格控制标高，在墙、柱钢筋上必须抄标高控制线，四川省拉拉铜矿经济适用住房（二标段）工程筏板大体积混凝土施工方案四川省凉山州恒利建筑有限责任公司司以便随时抄平，对集水坑、电梯基坑等标高