ow12.施工缝、沉降缝防水施工作业指导书

1、Good is good, but better carries it.精益求精，善益求善。ow12.施工缝、沉降缝防水施工作业指导书新建铁路中铁五局衡茶吉铁路HCJ-2工程指挥部隧道工程施工缝、沉降缝防水施工作业指导书编 制 人： 审 核 人： 技术负责人： 单位负责人： 中铁五局衡茶吉铁路工程指挥部一项目经理部2009年6月目 录1.适用条件、范围12.施工缝、沉降缝的止水原理13.施工缝、沉降缝形式13.1.施工缝、沉降缝设计采用形式13.2.施工缝及沉降缝防水构造示意图14.施工工艺流程24.1.止水条施工流程24.2.外贴式止水带施工流程34.3.中埋式止水带施工流程35.施工方法3

2、5.1.止水条施工35.1.1止水条施工方法35.1.2.止水条施工注意事项45.2.外贴式止水带施工45.2.1.外贴式止水带施工方法45.2.2.外贴式止水带施工注意事项45.3.中埋式止水带施工55.3.1.中埋式止水带施工方法55.3.2.中埋式止水带施工注意事项56.质量检查标准675, growing number of older persons, group size, is an important social concern groups. The sixth population census data show, 2010 China's population

3、 over the age of 60 for 177.6 million, accounting for 13.26% of the total population, aged 65 and over had a population of 119 million people, accounting for 8.87%. According to the data released by the United Nations from 2000 to 2010, China's elderly population increased by 50 million, an aver

4、age annual increase of 5 million, the proportion of the elderly population has increased 3.3%, far exceeding 1% per cent share of the elderly population in the world. In early 2007, the national working Commission on ageing, released 21st century era of China's aging population, and the 21st cen

5、tury can be divided into three stages. First a stage is from 2001 to 2020, this is fast aging of stage, in this stage, average annual will increased old population 250 million, aging level will reached 17%; second a stage is from 2002 to 2050, this is accelerated aging of stage, in this stage, avera

6、ge annual will increased old population 6.2 million, while, with population appeared zero or negative, makes old population of proportion will reached 30% above; third a stage, From 2051 to 2011, which is the stable phase of ageing, old. Construction investment, further improve wubaohu support in ru

7、ral areas, rural subsistence allowances, assistance to the victims of the social assistance system, which for us to further improve rural five-guarantee work points the way. Building Socialist new countryside the situation, in accordance with the "production development, well-off life, civilize

8、d, clean and tidy, and democratic management" requirements, speed up the pace of home construction, further improve the County's five concentrated rate, is the cornerstone of solid construction of the rural social security system, is building a new Socialist countryside should be required.

9、To sum up, it is necessary for the implementation of this project, support and help from Government at all levels is also possible. Third, and improve the system. In accordance with the requirements, rules and regulations make the layout on the wall. Sound financial management system, the establishm

10、ent of special accounts and special accounts, account reconciliation, month. In life management, the strict schedule, getting up, tidy, doing aerobics, shift leader notes, weekly competitions. Food management, residents set up a food Management Committee. Adhere to the table, eating dinner, cooked f

11、ood, Also celebrate his birthday in the hospital system, when the canteen birthday meal, leading residents to celebrate. Home to five old people provided a venue for communication. In this relatively open family, lives, with residents who keys, entertainment, learning, labour, mutual understanding,

12、mutual exchange and enhanced confidence in the life, a7 中铁五局衡茶吉铁路工程指挥部一项目经理部施工缝、沉降缝防水施工作业指导书1.适用条件、范围 本作业指导书适用于中铁五局衡茶吉铁路HCJ-2标段采用喷锚构筑法设计和施工的隧道施工。2.施工缝、沉降缝的止水原理二缝（施工缝、沉降缝）是指混凝土与混凝土界面之间的缝隙，在混凝土界面嵌入止水材料时，止水材料和混凝土之间同时也形成了新的界面（缝隙），因此，二缝的止水都是界面缝隙的止水，在考虑了混凝土与混凝土界面缝隙的止水后，必须解决止水材料自身和混凝土界面的密封止水，同时必须满足土木工程止水材料

13、的可靠性和耐久性。施工缝缝隙一般都不大，在混凝土施工过程中和投入使用后，存在少量混凝土伸缩变形，沉降变形，相应止水材料也要适应这些变形，才能达到止水目的。与施工缝相比，沉降缝缝隙较宽，采用吸水膨胀率较大的遇水膨胀止水材料。3.施工缝、沉降缝形式3.1.施工缝、沉降缝设计采用形式施工缝：设计采用橡胶止水条中埋橡胶止水带进行防水。变形缝：设计采用外贴橡胶止水带中埋橡胶止水带进行防水。3.2.施工缝及沉降缝防水构造示意图 1、施工缝防水示意图 施工缝防水示意图 2、变形缝防水示意图变形缝防水示意图4.施工工艺流程4.1.止水条施工流程制作安装专用端头模板浇筑混凝土拆模后清理预留槽固定止水条浇筑下一循

14、环混凝土止水条施工工艺流程4.2.外贴式止水带施工流程定位放线基面处理固定带水条外贴止水带施工工艺流程浇筑混凝土4.3.中埋式止水带施工流程挡头模板钻钢筋孔固定钢筋卡固定止水带下一循环止水带定位中埋式止水带施工工艺流程浇筑混凝土拆挡头板5.施工方法5.1.止水条施工5.1.1止水条施工方法1）水平施工缝水平施工缝施工在先浇筑混凝土初凝后、终凝前，根据止水条的规格在混凝土基面中间压磨出一条平直、光滑槽。拆除混凝土模板后，凿毛施工缝，用钢丝刷清除界面上的浮渣，并涂25mm厚的水泥浆，待其表面干燥后，用配套的胶粘剂或水泥钉固定止水条，再灌注下一循环混凝土。2）环向（竖向）施工缝环向（竖向）施工缝采用

15、在端头模板中间固定木条或金属构件等，混凝土浇筑后形成凹槽。槽的深度为止水条厚度的一半，宽度为止水条宽度。在灌筑下一循环混凝土之前，对预留槽进行清理，将止水条贴在槽中，模板台车定位后，灌筑下一循环的混凝土。5.1.2.止水条施工注意事项1、施工前，必须对止水条的宽度、厚度（直径）进行检查,确保符合设计要求。2、止水条安放前，必须对预留槽进行清理，清理干净，排除杂物。3、止水条必须安装在预留槽内，安装时先在槽内涂抹一层氯丁胶粘剂，使其粘结牢固，并用水泥钉固定，水泥钉的间距小于60cm。4、止水条安装尽量安排在下一循环混凝土浇筑前35h。5、止水条安装时应顺槽拉紧嵌入，确保止水条与槽底密贴，不得有空

16、隙。6、止水条接头处应重叠搭接后再粘接固定，沿施工缝形成闭合环路，其间不得留断点。7、振捣混凝土时，振捣棒不得接触止水条。5.2.外贴式止水带施工5.2.1.外贴式止水带施工方法 1、位置确定 外贴式止水带设置在衬砌结构变形缝的外侧，施工时按设计要求先在需要安装止水条的位置放出安装线。 2、基面处理 对直接设置在岩壁或初期支护找平层的外贴式止水带，设置的部位预先用氯丁胶乳砂浆进行抹平处理，防水砂浆抹面的宽度大于止水带宽度20cm以上。 3、止水带固定 施工缝处设计有防水板的，如止水带材质与防水板相同，则采用双焊缝热焊机将止水带固定在防水板上。对于设计为橡胶止水带时，则采用粘接法将其与防水板固定

17、。对于施工缝处设计没有防水板的，则采用粘结法固定在岩壁或初期支护找平层上。5.2.2.外贴式止水带施工注意事项1、施工时按照设计要求的位置放出安装线。2、对与止水带进行粘结的防水板进行擦洗清洁。3、采用粘结法将止水带与防水板连接。4、衬砌台车就位，安装挡头板时不得损伤止水带。5.3.中埋式止水带施工5.3.1.中埋式止水带施工方法沿衬砌环线每隔0.51.0m，在模板端头钻一12mm的钢筋孔。将制成的钢筋卡穿过挡头模板，内侧卡紧止水带一半，另一半止水带平靠在挡头板上，待混凝土凝固后拆除挡头板，将止水带拉直，然后弯钢筋卡紧止水带。5.3.2.中埋式止水带施工注意事项1、止水带埋设位置应准确，其中间

18、空心圆环应与沉降缝重合。2、中埋式止水带应固定在挡头模板上，先安装一端，浇筑混凝土时另一端应用箱型模板保护，固定时只能在止水带的允许部位上穿孔打洞，不得损坏止水带本体部分。3、固定止水带时，应防止止水带偏移，以免单侧缩短，影响止水效果。 4、止水带定位时，应使其在界面部位保持平展，不得使橡胶止水带翻滚、扭结，如发现有扭结不展现象应及时进行调正。 5、橡胶止水带接头必须粘接良好，不应采用不加处理的“搭接”。6、止水带粘接前应做好接头表面的清刷与打毛，接头处选在衬砌结构应力较小的部位，粘接可采用热硫化连接的方法，搭接长度不得小于10cm，焊接缝宽不小于50cm。冷接法应采用专用粘结剂，冷接法搭接长度不得小于20cm。 7、设置止水带接头时，应尽量避开容易形成壁后积水的部位，宜留设在起拱线上下。8、在浇捣靠近止水带附近的混凝土时，应严格控制浇捣的冲击力，避免力量过大而刺破橡胶止水带，同时还必须充分震捣，保证混凝土与橡胶止水带的紧密结合，施工中如发现有破裂现象应及时修补。 9、衬