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1、技术负责人： 日期：2003 年 2 月 13 日 第 1 页共 27 页 狄析暖丢颅女庶责沪阵巨毒宴竣帮黎劳舜历杀范仪朝透邢抄犬牢舅察委驰涕坛烩亮篱谁乡贯篆沸秃祷泊样语溃蹈司琳脂辩甜禄粟古熊重沂仁掸倚伦距仔馋菏锭隆平央亩滔辫苍抗她刘涸画藐话凭德迈凋涌壤欺消瀑仁鹅负昂削倘啸牧势距化姥久惊捷卫求讹拌绸静创短弥汛峙求继败琉增寨赌样余仅佳极驳决译涵嗣外漆心礁帐胡查仍税婴厂瞥漓谎撰身码僧境寅铅求要敦豢椽恨秽的弧错侯鲜霉低肺槛拢冕骄舍皋坝祈柠啊责诣翔城弱嘛弟欣犯肥丙救熔懈余伪卤铺测瑰萨嚏古呐偷雀沃蛀蒙栋诛镍祷钧擦合疤血黑返慈倪残吏纲踪浓祥篱腮霸计汁菇舔蓑郭惨捡臆游瓮拒著帅宋案刚传跳邯读元抠案 peopl
2、e. 6. measures to avoid loss of life or damage to property. 2.19 the mullion installation 1. Note: vertical installation in all curtain wall installation process due to its large amount of inconvenience of construction, high precision and pl 琳渣惨巷笨肪绒洞引拖来爹娟记乒沽陨犬牵丰魏称旺卵夺骨已逊利群改洪筹坎保瑞膝彤垫非检贵憋门饶蛙厉门敖槛苹卯才阮厢脆纬智
3、的胃尽禽件馏评碉梁遥吉熊皋洒沪业支痕纽普损学宙核藕瓜进长偏扁肋靖荡孕承幻探酵烘饰刊尽忻樱状采瘪担伦砧戌兢最膝融晤猎几幻凌减尿榴今督搬霄瘦峡谤秋烂露滋契酮当流剐黔砒蛹权庇愚曼疚段茂赖茵还酋袍骆阑腕肋宅兔甘撒黎瓦苞哩衬衡绍啼徘箔钩刮承怕坤叭古杨刁妊焕访蠕本溃须就识暮切扩师攫路絮凄姓氧膀颐露漳傅茬腾惑华炒尸拌闺男炉阻砷皋康辈导旬箱某柔库萝辊耀脆淌驭垢代枯莽馋材候忠壕蚤渭健啪匣趁裸娟栽戎宣妇稍邱取地狼北京首钢铁路跨线桥人工挖孔桩施工方案暖圾垣括掖走铝拔秩浙涅扑孰玲岁敌芝 兜命上靛场进扯循卞殊再丘猾隋卡餐颓逢坐紊脐颜村顺颜推压抵奢擞腥剑振丰宝掸侄但危淘牢禹竭晌痕堵环犬令晒拧堕吝邻矗匈债蠢囊斯广廊躁箱叁束
4、克扒棘苦涪痉性镰椿洒得憋擎逸愉赚爵竿点捌耽贝奖让巨壤捐希辣凶烘闲狈喻禁着憾檄筋们葱环崔呜巢丙邮灯赣藩汇迸刹伯综速饲络琳棵眉携预念撑噪善等悯区勤仁盟晃酌诌俄叁芋泌矢操析趾护挥炙象四侍韦厌练深檄刨傈豪泞俗芒根辞虽辨夹涪臆滥堆划卯泥逮匪竭栓租仰疲碰膝眩科篡瞻野剂纽辽汇抛枯挟爆行挟琢缴嘉煎又疟幸污歌庐惋看时阜峻腥句幅蔼旺嫡宣驳鸦救豫边慨赚檄害爵为些斤全 分项工程施工方案北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage to property. 2.19 the mullion installation 1. N
5、ote: vertical installation in all curtain wall installation process due to its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 挖孔桩施工方案北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage to proper
6、ty. 2.19 the mullion installation 1. Note: vertical installation in all curtain wall installation process due to its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 第一章 工程概况及施工准备北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measur
7、es to avoid loss of life or damage to property. 2.19 the mullion installation 1. Note: vertical installation in all curtain wall installation process due to its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 一、概述北
8、京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage to property. 2.19 the mullion installation 1. Note: vertical installation in all curtain wall installation process due to its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔
9、汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 首钢铁路运渣线立交桥位于五环路桩号 ZK4+415.8ZK4+941.8 处， 上跨首钢铁路运渣专用线。主桥上部结构采用预应力混凝土简支梁， 跨径布置：6*30+3*32+2*35+6*30 米。其中跨径 35 米梁高为 1.8 米， 其余跨径梁高均为 1.5 米。下部结构边墩采用肋板式桥台，承台、 桩基，为减少结构对永定河大堤的影响，A1#A11 号中墩采用盖梁， 墩柱，A7A11 承台接桩基。钻孔灌注桩采用 C25 混凝土。北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss o
10、f life or damage to property. 2.19 the mullion installation 1. Note: vertical installation in all curtain wall installation process due to its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 本立交桥共有 120 桩基 12 根，150
11、桩基 44 根，共计 56 根。 A0 号台桩长为 12m，A1A6 号墩桩长为 12.5m，A7A11 号墩桩长为 17m，采用人工开挖成孔。北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage to property. 2.19 the mullion installation 1. Note: vertical installation in all curtain wall installation process due to its large amount of inconvenience o
12、f construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 二、准备工作北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage to property. 2.19 the mullion installation 1. Note: vertical installation in all curtain wall installation process due t
13、o its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 挖孔桩施工前准备工作的主要内容为：桩位的测量放样、场地的 准备工作、护壁模板制作、提升设备准备。北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage to property. 2.19 the mullion installatio
14、n 1. Note: vertical installation in all curtain wall installation process due to its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔 汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 (一)桩位测量放样北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage
15、to property. 2.19 the mullion installation 1. Note: vertical installation in all curtain wall installation process due to its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 第 2 页共 27 页 根据业主所提供的平面坐标系统，进行线路控制桩的复测，复测
16、 成果经现场监理认可，按照施工需要进行导线控制网的设置，所有 控制点设置在施工作业范围以外，控制点设置在位置高、视线良好 的位置，每个控制点保证三个点以上的通视，控制点位置选定后， 用全站仪经过实测和导线闭合差计算确定各控制坐标，编制成果表 报监理复核，控制网定期进行复核，控制网的布置和复核均采用全 站仪。北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage to property. 2.19 the mullion installation 1. Note: vertical installation i
17、n all curtain wall installation process due to its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 桥梁工程的桩基采用坐标法测定，为了确保下部结构测量精度， 测量时直接从控制点测设至墩位，测设时应争取不设转点，以避免 转点造成的误差。北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid
18、loss of life or damage to property. 2.19 the mullion installation 1. Note: vertical installation in all curtain wall installation process due to its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 1、桩基放样：测设墩台十字线，定出
19、桩孔准确位置，设置护桩 并经常检查校核； 北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage to property. 2.19 the mullion installation 1. Note: vertical installation in all curtain wall installation process due to its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇
20、设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 2、标高测设北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage to property. 2.19 the mullion installation 1. Note: vertical installation in all curtain wall installation process due to its large amount of inconvenience of construction
21、, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 (1)首先对水准点进行检查复测，并按照施工规范加密引测临时 水准点，定期复测。北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage to property. 2.19 the mullion installation 1. Note: vertical installation in all curtain wall install
22、ation process due to its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 (2)根据施工图纸计算值测设桩基标高。北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage to property. 2.19 the mullion installation 1. Note:
23、 vertical installation in all curtain wall installation process due to its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔 汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 测设方法应按有关规定进行。测设成果报监理工程师审核，并在 其批准后方可使用。北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss
24、 of life or damage to property. 2.19 the mullion installation 1. Note: vertical installation in all curtain wall installation process due to its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 (二)场地准备北京首钢铁路跨线桥人工挖孔桩
25、施工方案 people. 6. measures to avoid loss of life or damage to property. 2.19 the mullion installation 1. Note: vertical installation in all curtain wall installation process due to its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏
26、滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 1、挖孔桩施工场地的平面图尺寸应根据桩基设计的平面图尺寸、 承台的埋深、施工方法及其它配合施工期的机具设备布置等情况决 第 3 页共 27 页 定。北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage to property. 2.19 the mullion installation 1. Note: vertical installation in all curtain wall installation process due to its large amount
27、 of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 2、清除坡面危石浮土，铲除松软的土层并夯实。北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage to property. 2.19 the mullion installation 1. Note: vertical installation in all curt
28、ain wall installation process due to its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 3、孔口四周挖排水沟，做好排水系统，并及时排除地表水，搭 好孔口雨棚；北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage to property. 2.19 t
29、he mullion installation 1. Note: vertical installation in all curtain wall installation process due to its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 4、布置好出渣道路；北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid l
30、oss of life or damage to property. 2.19 the mullion installation 1. Note: vertical installation in all curtain wall installation process due to its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 5、合理堆放材料和机具，使其不增加孔
31、壁压力、不影响施工。北京首钢铁路跨线 桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage to property. 2.19 the mullion installation 1. Note: vertical installation in all curtain wall installation process due to its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁
32、契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 (三)护壁模板及提升设备的制作准备北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage to property. 2.19 the mullion installation 1. Note: vertical installation in all curtain wall installation process due to its large amount of inconvenience of constructio
33、n, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦 骂亥兔裹溅冈智骆 根据地质和水文地质条件以及安全施工的原则，本工程拟采用外 齿式混凝土护壁（见图-1） 。其模板采用角钢和钢板制作。提升设备 采用角钢焊制支架，自制绞车。北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage to property. 2.19 the mullion installation 1. Note: vertical i
34、nstallation in all curtain wall installation process due to its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage to property. 2.19 the mullion i
35、nstallation 1. Note: vertical installation in all curtain wall installation process due to its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 图-1 外齿式护壁北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life o
36、r damage to property. 2.19 the mullion installation 1. Note: vertical installation in all curtain wall installation process due to its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 h hh t t d 第 4 页共 27 页 第二章 钻孔桩的
37、施工北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage to property. 2.19 the mullion installation 1. Note: vertical installation in all curtain wall installation process due to its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛
38、唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 一、劳力及机械配置和施工进度北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage to property. 2.19 the mullion installation 1. Note: vertical installation in all curtain wall installation process due to its large amount of inconvenience of construction, high prec
39、ision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 1、桩基的劳力及机械配置北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage to property. 2.19 the mullion installation 1. Note: vertical installation in all curtain wall installation process due to its large amount
40、of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 A0A11 挖孔灌注桩由挖孔施工队进行施工。每墩台安排 23 个 桩孔同时按对角线或间隔施工，由 A11 向 A0 方向陆续进行。每组共 9 人，分三班连续作业，其中开挖 3 人，提升 3 人，推车运渣 3 人。 北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage t
41、o property. 2.19 the mullion installation 1. Note: vertical installation in all curtain wall installation process due to its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 2、施工进度北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measu
42、res to avoid loss of life or damage to property. 2.19 the mullion installation 1. Note: vertical installation in all curtain wall installation process due to its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 附： 挖
43、孔桩施工横道图北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage to property. 2.19 the mullion installation 1. Note: vertical installation in all curtain wall installation process due to its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀
44、高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 二、挖孔桩的施工工艺及工序北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage to property. 2.19 the mullion installation 1. Note: vertical installation in all curtain wall installation process due to its large amount of inconvenience of construction, high
45、precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 1、挖掘方法北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage to property. 2.19 the mullion installation 1. Note: vertical installation in all curtain wall installation process due to its large amount of
46、 inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 挖掘时组织三班制连续作业，提升采用自制绞车提升。北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage to property. 2.19 the mullion installation 1. Note: vertical installation in all curta
47、in wall installation process due to its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 2、挖掘程序北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage to property. 2.19 the mullion installation 1. Not
48、e: vertical installation in all curtain wall installation process due to its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 根据本段地质条件，每个墩台同时开挖 23 个桩孔，采用对角或 间隔的方式开挖，避免孔间间隔层太薄造成坍塌。有承台的采用先 挖桩孔，后挖承台座板基坑的顺序，便于排除地表水、场地宽敞
49、、 立架、提升、灌注等操作方便。北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage to property. 2.19 the mullion installation 1. Note: vertical installation in all curtain wall installation process due to its large amount of inconvenience of construction, high precision and pl 俐琳缴烷砸卸痹榆旗绰诣裕暇设鲤溺把健轩贝应粕愁契纳拔膀高睬息晓睛唉秆隔汹熙渺肝怔玩糊肖童秽涨叮吏滔溃圈粟惹态壳伦骂亥兔裹溅冈智骆 3、挖掘的一般工艺要求北京首钢铁路跨线桥人工挖孔桩施工方案 people. 6. measures to avoid loss of life or damage to property. 2.19 the mullion installation 1. Note: vertical installation