预应力钢束张拉作业指导书

中铁十三局集团有限公司合福铁路安徽段站前二标

施工过程控制标准化管理手册

编号：ZT13J-SGZD-HD-XX

预应力钢束张拉作业指导书

编 制： 审 核： 批 准：

201 年 月 日发布 201 年 月 日实施

中 铁 十 三 局 集 团 有 限 公 司 第 六 工 程 公 司

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目 录

1 目的··············································································2 2编制依据············································································2 3适用范围············································································2 4作业准备············································································2 4.1技术准备··········································································2 4.2材料、设备准备·····································································2 5.劳动组织···········································································2 5.1劳动力组织方式····································································2 5.2施工人员结合既定施工方案、机械、工期要求进行合理配置································2 6 材料要求···········································································2 6.1预应力钢绞线·····································································3 6.2锚具、夹具········································································3 7设备机具配置······································································3 8.张拉程序与工艺流程································································4 9.施工要求·········································································4 9.1技术要求·········································································4 9.2钢绞线下料、穿束···································································4 9.3锚具及千斤顶安装··································································4 9.4张拉··············································································5 9.5伸长量的计算和量测································································5 10.预应力施工质量控制及检验··························································6 10.1质量控制·········································································6 10.2质量检验·········································································6 11.安全及环保要求····································································7

预应力钢束张拉作业指导书

1目的：

新建合福铁路(安徽段)铜陵长江北引桥（40+56+40）m是施工中重点控制部位，为了确保悬臂浇筑连续梁张拉的施工质量，特编制预应力钢束张拉作业指导书，用以指导此类工程施工。

2编制依据：

《铁路预应力混凝土连续梁悬臂浇注施工技术指南》TZ324-2010 《高速铁路桥涵工程施工质量验收标准》TB10752-2010 /J1148-2011 《铁路混凝土工程施工技术指南》铁建设［2010］241号 《高速铁路桥涵工程施工技术指南》铁建设［2010］241号 3. 适用范围

新建合福铁路(安徽段)铜陵长江北引桥（40+56+40）m悬臂浇筑连续梁张拉施工。 4.作业准备 4.1技术准备

张拉人员认真熟悉图纸规定的施工方法、张拉顺序、张拉时间、张拉应力及张拉伸长量；熟悉规范规定的张拉要求，及质量标准，计算钢绞线实际下料长度、施工时与设计张拉力对应的张拉油表值、钢绞线各张拉阶段伸长值。

4.2材料、设备准备 4.2.1预应力钢绞线

根据图纸设计，使用的钢绞线为1×7-15.2-1860-GB钢绞线，钢绞线使用前由试验室对每批钢绞线进行检验，检验合格后才能使用。

4.2.2锚具、夹具

锚具使用前由试验室进行外观、硬度、锚固性能及工艺性能的抽样检验，检验合格的锚具才能使用。

4.2.3张拉设备

张拉千斤顶的额定张拉吨位为张拉力的1.5倍，张拉千斤顶在使用前必须经过校正，校正系数不大于1.05，校正有效期为1个月，且张拉次数不得超过300次，千斤顶拆修或更换配件应重新校正。

压力表的表面最大读数为张拉力的1.5倍，0.4级校正有效期为1个月。且压力表应与张拉千斤顶配套使用。

5.劳动组织

5.1劳动力组织方式：采用架子队组织模式。

5.2施工人员应结合施工方案、工期要求、机械配置等合理安排。张拉油表控制人员4人，控制张拉力及油表读数。伸长量测量人员4人。张拉工班长1人，负责张拉速度等整个协调工作。电工1人。 6.材料要求

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6.1预应力钢绞线

根据图纸设计，使用的钢绞线为1×7-15.2-1860-GB钢绞线，竖向采用Ф25PSB 785精轧螺纹钢，精轧螺纹钢和钢绞线使用前由试验室对每批钢绞线、精轧螺纹钢进行检验，检验合格后才能使用。

6.2锚具、夹具

锚具使用前由试验室进行外观、硬度、锚固性能及工艺性能的抽样检验，检验合格的锚具才能使用。

7.设备机具配置

张拉千斤顶和张拉油泵采用柳州OVM产品，张拉工作前提前标定，具体数量见下表：

预应力施工主要机械设备配备表

序号 1 2 3 4 5 6 设备名称 油泵 千斤顶 千斤顶 千斤顶 卷扬机 倒链 型号 ZB4-500 YCW400B YCW60B YDC240QX 5T 1T 数量 4 4 2 2 2 4

8.张拉程序与工艺流程

张拉程序为：0→0.10σk（作伸长量标记）→0.2σk（作伸长量标记）→σk（静停5分钟）→