钢筋砼预制桩打桩工艺.doc

1． 范围

本工艺标准适用于工业与民用建筑中的打钢筋混凝土预制桩工程。
2．施工准备
2.1  材料及主要机具：
    2.1.1  预制钢筋混凝土桩：规格质量必须符合设计要求和施工规范的规定，并有出厂合格证。
    2.1.2  焊条（接桩用）：型号、性能必须符合设计要求和有关标准的规定，一般宜用E4303牌号。
    2.1.3  钢板（接桩用）：材质、规格符合设计要求，宜用低碳钢。
    2.1.4  主要机具有：柴油打桩机、电焊机、桩帽、运桩小车。索具、钢丝绳、钢垫板或槽钢，以及木折尺等。
    2.2  作业条件：
    2.2.1  桩基的轴线和标高均已测定完毕，并经过检查办了预检手续。桩基的轴线和高程的控制桩，应设置在不受打桩影响的地点，并应妥善加以保护。
    2.2.2  处理完高空和地下的障碍物。如影响邻近建筑物或构筑物的使用或安全时，应会同有关单位采取有效措施，予以处理。
    2.2.3  根据轴线放出桩位线，用木橛或钢筋头钉好桩位，并用白灰作标志，以便于施打。
    2.2.4  场地应碾压平整，排水畅通，保证桩机的移动和稳定垂直。
    2.2.5  打试验桩。施工前必须打试验桩，其数量木少于2根。确定贯入度并校验打桩设备、施工工艺以及技术措施是否适宜。
    2.2.6  要选择和确定打桩机进出路线和打桩顺序，制定施工方案，作好技术交底。
3．操作工艺
3.1  工艺流程：
 就桩桩机 → 起吊预制桩 → 稳桩 → 打桩 → 接桩 → 送桩 → 

中间检查验收 → 移桩机至下一个桩位  

    3.2  就位桩机：打桩机就位时，应对准桩位，保证垂
1. Range

This technology is applicable to industrial and civil buildings in precast reinforced concrete piles to play.
2. Construction preparation
2.1 Materials and main equipment:
    2.1.1 precast reinforced concrete piles: specifications must meet the design requirements and construction specifications of requirements and a factory certification.
    2.1.2 electrode (the pile to use): model, performance must meet the design requirements and provisions of the relevant standards, generally it is appropriate to E4303 grades.
    2.1.3 plate (with the pile): materials, specifications, design requirements, it is appropriate low-carbon steel.
    2.1.4 The main machine has: Diesel hammer, welding machines, pile caps, pile car transport. Rigging, wire rope, steel plate or channel, and wooden folding ruler and so on.
    2.2 Operating conditions:
    2.2.1 pile axis and elevation have been measured and have been organized through the pre-inspection procedures. Pile axis and the elevation of the control pile, piling should be set without affecting the location, and should be protected properly.
    2.2.2 processed aerial and underground obstructions. Impact of adjacent buildings or structures such as the use or safety, in conjunction with the relevant authorities to take effective measures to deal with.
    2.2.3 Pile released under the axis line, with a wooden peg or a steel screw piles bit better, and with the white ash as an indicator for the injections.
    2.2.4 The site should be rolled flat, the drainage flow, to ensure stability of the vertical movement and pile driver.
    2.2.5 Test Piles play. Fight test piles before construction, the number of trees less than 2. Determine the penetration and check piling equipment, construction technology and technical measures are appropriate.
    2.2.6 To select and determine the line of hammers and piling out of the order of the construction project and make technical disclosure.
3. Operation Process
3.1 Process:
 The lifting of precast piles pile machine → → → stable pile the pile piling → → → jacked piles

Intermediate examination and acceptance → Move to the next Pile Driver Pile

    3.2 in place pile driver: pile in place, the pile should be aligned position, to ensure vertical