钢筋混凝土结构裂缝处理方案修改版.doc

Pushing ahead, East, North, West development, facilitating shanty, complete xincheng West Road, stability and reconstruction of the street, Star Ding garden built century Garden District, subject public housing construction, heating the gas expansion accelerated implementation, Jing Rui River and bridge style line solid shaft, further expanded the town development. Beautiful country adhere to the advance and typical for a group to lead. According to ecological lay based, and industry increased income, and live upgrade civilization, and culture rich connotation of thought, caught built beautiful village, and whole village advance, and easily relocation, and five modified three built, project near 30 a; depth into ecological, and industry, and culture, and tourism, elements, high standards caught party original city Liu, and jade are Xia AO, model village, in province City set has benchmark. Four is equal benefits to promote sharing, coordinated development of various social undertakings. In the case of rigid spending slowing revenue growth, increase, financial 75% to the peoples livelihood, the masses have more access in the sharing. Cuoban something good and benefit. Adhere to the affordable, best, carefully cuoban village oil, water and heat, cultural, city and County columns practical, developments benefit families, bring more welfare to the masses. Development of social convenience. Acceptance of balanced development of compulsory education through the national assessment, the County vocational education center was named top School of vocational education in China, the third batch of national reform and development model through provincial . Five is to deepen reform and innovation to break bottlenecks and endogenous development of effective fire. As an engine of dynamism, adding reform key to adopting reform measures stress energy and break bottlenecks and promoting development. Pay close attention to the key areas of reform. Conscientiously implement the provincial deployment and cancel, adjustment, to undertake the administrative approval items according to Regulation 347 to further improve administrative efficiency continuing deepening reform for poverty alleviation, speeding up rural land right registration certification pilot project, encouraging the orderly transfer of land management, utilize the land resources, in order to promote scale management laid the Foundation. Actively cultivate the market. Firmly establish a market-oriented, nurturing family farms, industrial users, professional cooperation organization new market management main body 456, effectively improve the industry, intensive and marketization of encouraging support social capital into the small micro-credit, urban development, culture and tourism, public services and other areas, easing development shortfall. To promote mass innovation. To support the rural sector to use new thinking and new ideas, creative work incentives such as actively promoting financial intermediation, bring added 159 in non public enterprises, individually-1540, created a福建华鼎建设工程有限公司 顶板钢筋混凝土结构裂缝处理方案 顶板钢筋混凝土结构裂缝处理方案一、工程概况：总建筑面积2570.8m2（其中：教学综合楼为2066.1m2，学生宿舍为504.71m2）教学综合楼建筑高19.45m，为地上四层，一至三层层高3.6m，四层层高4.2m；学生宿舍楼建筑高11.25m，为地上三层，一至三层层高3.6m。结构体系：教学综合楼、学生宿舍楼采用现浇钢筋砼框架； 地基为天然地基，顶板结构板设计厚度120mm，个别板厚110mm，配筋基本为 8150双向双层混凝土强度C25P6。二、裂缝情况：施工时间2012年4月03日完成顶板浇筑，2012年15月初拆模完淋雨后在板底可看到渗水，在顶板上面可看到部分裂缝，宽度较小最大约0.2 mm,，从板底看每跨板裂缝呈整块龟裂状，详见附图一。裂缝宽度较小基本小于0.5mm，肉眼很难看到，只有通过淋雨才能观察到（详见附图二）。三、编制依据施工设计图纸、建筑工程施工质量验收统一标准（GB50300-20010、混凝土结构加固设计规范（GB50367-2006）、建筑结构加固工程施工质量验收规范四、裂缝原因分析经各参建单位有关技术人员对现场进行详细勘察、研究、分析，该顶板裂缝产生原因有：（一）、商品混凝土引起的收缩裂缝，混凝土外加剂不稳定、骨料含泥量、水泥用量等均会产生收缩裂缝；（二）、温度应力引起的裂缝：由于温差变化大，在物体的热胀冷缩的作用下产生裂缝；又顶板为一整体，部分上部结构覆盖，热胀冷缩不均匀加大裂缝的产生。五、处理方式： 经对裂缝的勘察、研究、分析，此裂缝不属于在使用荷载下出现的受力裂缝，也不属于在非正常荷载下出现的受力裂缝，无需进行结构加固，只需对裂缝进行修补、封闭处理，保证结构在使用年限的耐久性。 修补方法应按裂缝类别分别处理，遵循“先样板、后施工”分段进行的原则。 六、施工准备：1、选择有资质的班组及组织质量管理小组选折有结构补强资质及工程经验丰富的施工队伍，进场前资质证明应先报监理审核；成立专门质量管理小组：组长郑为奋，成员有翁琪、邱进裕；2、材料与设备准备：注浆材料选用环氧树脂成分的灌浆料，该产品具有结构补强的材料，为双组分，通过化学作用固结成分高，硬化后不收缩，接着性强，弹性模量与混凝土接近，对微细裂缝均可发挥完成作用，起到结构补强及防渗漏作用。所有材料进场必须有合格证及质量检测报告；设备：照明灯、灌浆机具、手锤、凿子、铲子、钢丝刷、扫帚、抹布、冲击钻、切割机、止水针头等。七、施工工艺：（一）、检查裂缝状态；（二）、表面龟裂及裂缝宽度W0.2mm采用渗透结晶型防水材料进行修补：材料按0.3:1的水灰比（重量比）调配成水泥砂浆状进行涂刷施工，一般用量为: 1.2/（0.8厚度）。涂料搅拌应充分均匀，不能有小灰球，用多少拌多少，搅拌好的涂料应在30分种内用完，在高温条件下，时间还要相应短些。 涂料常用施工方法可以用毛刷涂刷、滚筒滚刷、刮板刮、泥夹抹，喷涂喷等方法。涂刷和滚筒方法施工要分二次完成，两次涂刷的时间间隔为2-3h，应正反方向来回涂刷，其它施工方法可一次完成。在涂刷施工时要充分保持湿润的基面才可进行涂刷，有时要边涂刷边喷雾，保持基面的润湿。 施工后的6-8小时内进行喷水保湿养护，每天2-3次，隔天再养护一次（养护保湿不能用蓄水养护）。 （三）、对于贯穿性裂缝宽度0.1mmW0.5mm用注射结构胶：(1)、裂缝表面处理 a.用角磨机将裂缝割成宽1-2mm，深20-30mm的V型槽，并用钢丝刷将裂缝周围清除干净: b.用吹风机等将裂缝处的灰尘清除。 (2)、打孔安装针头在裂缝集中的范围内以15cm至25cm的距离打孔，预埋针头，拧紧；（3）、裂缝灌注施工施工前先用清水进行试注射，可得到相近的压力值。将材料按配合比调均匀倒入灌浆机，管口注入预埋好的针头中，压力保持在0.30.6Mpa，待压力稳定5分钟压力表不再回落后，且浆料从相邻的针孔渗出，表明液浆已渗漏部位充填密实，方可转入下一个针头中；如此作业依次灌好每一个灌浆点，完毕后24小时进行检查是否有波动 ；七、质量与安全措施1、防水材料进场后存放在通风、干燥地方，溶剂型材料存放与施工进行中必须注意防火，所有防水材料进场后经监理及业主单位有关人员检查合格后方可进行施工。2、施工前，对作业人员进行质量技术、安全技术与文明施工交底，使其详细了解操作规程与施工工艺，保证施工质量安全；应先试做一块样板验收合格后方可在进行大面积施工。3、保持注浆设备完好，注浆作业时，严格控制注浆压力，做好安全保护措施，严防高压浆液喷出伤人。4、作业人员操作时，必须戴好安全帽、防水工作服、软底鞋，立体作业时，搭好安全防护棚。5、施工过程中，加强现场通风，配足