素混凝土桩施工方案

素混凝土桩施工方案 1 施工现场必须清除地上和地下一切障碍物后再予以平整。施工前应预留保护土mm保护。测量结果经自检、 .........1 2 机..................................................................................................................................................................桩顶砼达到龄期后，清理桩间土，并截除桩头...........................................................................桩体检验合格后，铺设砂垫层 允许偏差................................................................................................................................................................单位检验数量...........................................................................................................................................1..................................................................................................................................................................................桩位(纵横向)..................................................................................................................................................50mm.............................................................................................................................................................................................2..................................................................................................................................................................................桩体垂直度..........................................................................................................................................................1%.........................................................................................................................................................................3...........................................................................................................................................................................................................................................................................................................................mm........................................................4..................................................................................................................................................................................桩顶高程................................................................................................................................................................mm.........................................................................................................................................2222222222222222222222......................................................................................................2电流值增大，说明孔内阻力增大，应降低钻进速度；...........................................................2...........................3.....................................................................................................................................................................................3 然后输送混凝土。...........................................................................................................................................3可浇筑。................................................................................................................................................................3.......................................................................................................................................3inmm顶混凝土 用钻机机座的导轨自动平移。................................................................................................................4成。..........................................................................................................................................................................4....................................................................................................................................................................................................................................................................................................................................................4 成桩24小时后清土，清土采用小型机械设备及人工挖土、运输；小型机械挖土...............4后用高一级混凝土填补并振捣密实。................................................................................................4........................................................................................项目..........................................................................................................................................................................序号..........................................................................................................................................................................检查项目................................................................................................................................................................合格标准................................................................................................................................................................................................................................................................................................................................主控项目................................................................................................................................................................1..................................................................................................................................................................................44444444 4 4 4 4 4 4桩距(mm) 4 4 4 4 派专人记录钻孔、 5 5 5 5 5 5 5 5 ............................................................................................................................................................................4..............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................5..................................................................................................................................................................................合计........................................................................................................................................................................................................序号.........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................数量..........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(KW).................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ZKLBB................................................................................................................................................................1..................................................................................................................................................................................5555555666666666666666..........................................................................................................................................................................2012.......................................................................................................................................................................................................................................................................................................................................................桩基..........................................................................................................................................................................2.........................................................................................................................................................................................................................................................................................................HBT-60..........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................2011....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................3........................................................................................................................................................................................................................................................................................BX-300..........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................2012.................................................................................................................................................................................................................................................................................................................................................................................................................................序号......................................................................................................................................................................................................................................................................................................6666666666666666666666................................................................................................................................................................数量...........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................备注...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................GP15.....................................................................................................................................................................1..........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................2.........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................2012..............................................................................................................................................................................................................................................................................................................................................6666666666666666666666 6 6 6 6 6 6 6 6 8后放出各桩的准确位置，将线路纵坡、横坡考虑在内后，原地面标高控制在正负 ..............................................................................................................................................8员弄虚作假、..........................................................................................................................................................8......................................................................................................8垂直度不大于1%，确保桩体的正常受力。....................................................................................8止素混凝土桩成吊脚桩。.....................................................................................................................................................................................810)、整个施工过程中，应安排质检人员旁站监督，并作好施工原始记录。记录理措施等。..........................................................................................................................................................811)、为控制提钻速度，应购置秒表配发到记录人员，钻孔时间、拔管速度、灌.........................................................................................................8.....................................8避免反插。在拔管过程中若出现反插，由于桩管垂直度的偏差， 17)、在截取桩头前应准确测量桩顶标高，并在纵横向挂线标示桩头水平位置。..................928天后应及时进行单桩承载力或复合地基承载力试验，其承载力、变形模量应符合设计要求。................................................................................................................................................9.............................................................920)、素混凝土桩成桩后，桩顶以上没有一米垫层情况下严禁大型机械进入施工 9 掺量，坍落度应控制在160mm~200mm之间。.................................................................................9.............................................9...........................................9易造成管路堵塞。...........................................................................................................................................9 桩的桩顶开始回升，此种现象称为窜孔。发生窜孔的条件有如下三条:1)被加固土层中有松散饱和粉土、粉细砂;2)钻杆钻进过程中叶片剪切作用对土体产生扰.............9连续施工的桩数，减少对已打桩扰动能量的积累；3)合理提高钻头钻进速度。 10 (D为设计桩径)，将上部断桩取出，然后将桩四周加深开挖20cm，将断桩处的 10 6、安全生产保证措施.................................................................................................................................106.1、安全措施...............................................................................................................10...............................10........................................................................................................................................................11禁吸烟。...................................................................................................................................................115)、现场用电设备做好防雨工作，用电采用三相五线制，两级漏电保护装置。 11 配备一定数量的灭火器及水桶。..........................