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地下防水卷材施工工艺流程是怎样的？

地下防水卷材施工工艺流程是怎样的？

浏览：56次 | 提问时间： 08-07 02:53

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你孤僻成殤我冷漠成性 08-07 02:53

地下防水卷材施工工艺流程是:1）地下工程卷材防水层的防水方法有两种，即外防水法（将防水层贴在结构的外面，即迎水面）和内防水法（将防水层贴在结构的里面，即背水面）。外防水法分为“外防外贴法”（施工结构层→防水层贴在结构层上→砌保护墙）和“外防内贴法”（砌保护墙→将防水层贴在保护墙上→施工结构层）两种施工方法。一般情况下大多采用外防外贴法。2）外贴法与内贴法相比较，其优点是：防水层不受结构沉陷的影响；施工结束后即可进行试验且易修补；在灌筑混凝土时，不致碰坏保护墙和防水层，能及时发现混凝土的缺陷并进行补救。但其施工期较长，土方量较大且易产生塌方现象，不能利用保护墙做模板，转角接槎处质量较差。3）地下工程的卷材防水层应选用高聚物改性沥青类或*高分子类防水卷材。4）卷材防水层在地下工程施工中要有一定的施工条件要求。防水层施工时，应按施工要求和土质情况降低基坑的地下水位，一般应将水位降低至防水层底部最低标高以下不少于300mm，并保持此水位直到保护结构完成为止。5）基坑周围的地面水应加以排除或控制，使其不流入基坑，同时要准备好排水措施，以防基坑中雨水积聚。用冷粘法施工的卷材防水层，施工完毕后还需留下排水装置，继续排水7d以上，以保证胶粘剂的充分固化，避免因过早撤掉排水装置而导致地下水上升到防水层、水压顶开卷材搭接部位的胶粘剂和密封膏，造成渗漏或鼓泡现象。6）铺贴卷材严禁在雨天、雪天施工；五级风及其以上时不得施工；冷粘法施工气温不宜低于5°C，热熔法施工气温不宜低于-10°C。7）采用外防外贴法铺贴卷材防水层，应先铺平面，后铺立面。第一块卷材应铺贴在平面基层和立面保护墙相交的阴角处，卷材在平面和立面上各占1/2。8）平面和立面相交处，应由平面开始从下向上铺贴卷材，阴角部位可用手持压辊滚压，使卷材紧贴阴角，无空鼓现象。阴角处不可有卷材接缝，卷材的接缝应留在平面上，距立面不应小于600mm。9）铺设完平面和立面的卷材防水层之后，应该对防水层进行质量验收。检查防水层表面有无皱褶、裂缝、孔洞、翘边等；卷材搭接缝处的封口条是否粘贴牢固，密封是否可靠等。如发现问题，要及时修补，消除隐患。10）防水层经验收合格后，应及时做保护层。在做保护层时，为了不使防水层破坏，可用胶粘剂点粘固定一层石油沥青纸胎油毡保护隔离层。保护层的做法应符合以下规定：顶板卷材防水层上的细石混凝土保护层厚度不应小于70mm；底板卷材防水层上的细石混凝土保护层厚度不应小于50mm；侧墙卷材防水层宜采用软保护或铺抹20mm厚1：2.5水泥砂浆。

带着你的温柔滚出我的世界 08-07 03:02

您好，1、地下防水卷材施工工艺的铺设准备：防水层施工前，应将油毡上滑石粉或云母粉刷干净，以增加油毡与沥青胶的粘结能力，并随时做好防火安全工作。 2、卷材铺贴的一般要求： ①卷材防水层施工应在屋面其他工程全部完工后进行。 ②铺贴多跨和有高低跨的房屋时，应按先高后低、先远后近的顺序进行。 ③在一个单跨房屋铺贴时，先铺贴排水比较集中的部位，按标高由低到高铺贴，坡与立面的卷材应由下向上铺贴，使卷材按流水方向搭接。 ④铺贴方向一般视屋面坡度而定，当坡度在3%以内时，卷材宜平行于屋脊方向铺贴；坡度在3%～15%时，卷材可根据当地情况决定平行或垂直于屋脊方向铺贴，以免卷材溜滑。 ⑤卷材平行于屋脊方向铺贴时，长边搭接不小于70mm；短边搭接，平屋面不应小于100mm，坡屋面不小于150mm，相邻两幅卷材短边接缝应错开不小于500mm；上下两层卷材应错开1/3或1/2幅度。⑥平行于屋脊的搭接缝，应顺流水方向搭接；垂直屋脊的搭接缝应顺主导风向搭接 ⑦上下两层卷材不得相互垂直铺贴。 ⑧坡度超过25%的拱形屋面和天窗下的坡面上，应尽量避免短边搭接，如必须短边搭接时，搭接处应采取防止卷材下滑的措施。

伴你久安痴心绝对 08-07 03:10

1、施工前将基层清理干净，并确定基层干燥度符合施工要求； 2、按照屋面坡度以平行屋脊方向将防水卷材摆放，并松卷； 3、点火：先旋开液化气瓶开关，然后手持喷*把慢慢旋开喷*开关，待听到燃气喷出的嘶嘶声时，点燃*，再调节开关，使*呈蓝色。点火人应站在喷头侧后，以免被*烧伤； 4、滚铺卷材：首先将末端翻起1m长左右，用长喷灯熔化底面的热熔胶后，迅速粘贴固定在基层上，然后将其余部分重新收成一卷。持*者站在已铺贴的卷材上，用长喷*的*对准成卷的卷材与基层表面的夹角，边熔化热熔胶边向前缓慢地地滚铺，使卷材粘贴在基层上； 5、搭接缝处理：卷材铺好后，相邻两幅卷材的搭结缝要用短喷灯熔焊粘牢，加热以溢出热熔的粘胶为度，然后再用*和铁抹子将接缝边缘均匀加热抹压； 6、对卷材搭接边进行密封施工。1、施工前将基层清理干净，并确定基层干燥度符合施工要求； 2、按照屋面坡度以平行屋脊方向将防水卷材摆放，并松卷； 3、点火：先旋开液化气瓶开关，然后手持喷*把慢慢旋开喷*开关，待听到燃气喷出的嘶嘶声时，点燃*，再调节开关，使*呈蓝色。点火人应站在喷头侧后，以免被*烧伤； 4、滚铺卷材：首先将末端翻起1m长左右，用长喷灯熔化底面的热熔胶后，迅速粘贴固定在基层上，然后将其余部分重新收成一卷。持*者站在已铺贴的卷材上，用长喷*的*对准成卷的卷材与基层表面的夹角，边熔化热熔胶边向前缓慢地地滚铺，使卷材粘贴在基层上； 5、搭接缝处理：卷材铺好后，相邻两幅卷材的搭结缝要用短喷灯熔焊粘牢，加热以溢出热熔的粘胶为度，然后再用*和铁抹子将接缝边缘均匀加热抹压； 6、对卷材搭接边进行密封施工。

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