桥梁工程概论之桥梁施工工艺.rar

桥梁工程概论之桥梁施工工艺

摘要： 一、下部结构    1.钻孔灌注桩365JT施工工艺    ⑴先填写书面开工申请报告，经监理工程师批准后方可开工。⑵以监理工程师签认的导线点为基准点，用红外线测距仪放样。⑶准确放出桩位后埋设护筒，经监理工程师复核无误后，用经纬仪引出桩位控制桩。⑷钻孔拟采用回旋钻。钻机就位首先安装好钻架及起吊系统，将钻机调平。钻杆位置偏差不得大于2厘米，钻进中经常检查转盘，如有倾斜或位移，及时调整纠正。钻孔所用泥浆现场......

一、下部结构
    1.钻孔灌注桩365JT施工工艺
    ⑴先填写书面开工申请报告，经监理工程师批准后方可开工。
⑵以监理工程师签认的导线点为基准点，用红外线测距仪放样。
⑶准确放出桩位后埋设护筒，经监理工程师复核无误后，用经纬仪引出桩位控制桩。
⑷钻孔拟采用回旋钻。钻机就位首先安装好钻架及起吊系统，将钻机调平。钻杆位置偏差不得大于2厘米，钻进中经常检查转盘，如有倾斜或位移，及时调整纠正。钻孔所用泥浆现场调制，储存在泥浆池中备用。钻进过程中要检查孔径和垂直度等并做好钻孔记录。
⑸清孔：钻孔深度符合365JT设计要求后，迅速通知监理工程师验孔，合格后立即进行清孔。清孔采用换浆法。
⑹安设钢筋笼：钢筋笼按照设计图纸在钢筋班集中下料现场成型，根据需要长度分成2-3节，钢筋笼要焊接牢固，吊孔结实，主筋、箍筋位置准确。钢筋笼标高偏差不得大于±5厘米。
⑺灌注水下砼采用拌合楼拌制，罐车运输，并输送至导管内。灌注前首先安装好导管。安装导管时应将连接螺栓对称拧紧，防止漏气。导管应随安装随放入孔中，
Introduction to the Bridge and Bridge Construction Technology

Summary: First, the lower part of the structure 1. ⑴ bored 365JT construction technology started to fill out a written report on the application by the supervising engineer for approval before starting. ⑵ to supervising engineer to sign and acknowledge the wire point of reference points, setting out with the infrared range finder. ⑶ accurate release Pile casings after the burial, for review by the supervising engineer is correct, the use of digital control theodolite leads to pile pile. ⑷ swing drill hole to be adopted. First place drilling rig installed racks and lifting system, the rig leveling. Drill position deviation of not greater than 2 cm, into the regular checks turntable, if tilt or displacement, timely adjustment to correct. Drilling mud used in the scene ......

1, lower structure
    1. Bored pile construction technique 365JT
    ⑴ first started writing for completing the report, be approved by the supervising engineer started.
⑵ to supervising engineer to sign and acknowledge the wire point of reference points, setting out with the infrared range finder.
⑶ accurate release Pile casings after the burial, for review by the supervising engineer is correct, the use of digital control theodolite leads to pile pile.
⑷ swing drill hole to be adopted. First place drilling rig installed racks and lifting system, the rig leveling. Drill position deviation of not greater than 2 cm Drilling regular checks turntable and, if tilt or shift in time to adjust to correct. Field modulation used in drilling mud, stored in a mud pool stand. Drilling process to check the degree of aperture and vertical borehole records and do.
⑸ Chiang Khong: Drilling depth found 365JT design requirements, promptly notify the supervising engineer inspection hole, hole after passing immediately clear. Hole cleaning method used for pulp.
⑹ install reinforcement cage: steel cage in accordance with the design drawings of reinforced centralized material on-site class shape, length, divided into 2-3 sections according to need, to be welded solid steel cage, hanging hole and firm, and longitudinal bars, stirrups position is accurate. Reinforcement cage elevation deviation of not greater than ± 5 厘米.
⑺ by pouring underwater concrete mixing plant mixing, tanker transport, and delivery to the duct. Installed before the first perfusion catheter. Install conduits should be symmetric connection bolts tightened to prevent leakage. Catheter should be placed with the installation with the holes in