A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention discloses a low-retraction prestressed anchorage device. The low-retraction prestressed anchorage device comprises a work anchorage plate, work clips and a pressure-bearing nut. Comparedwith common anchorage devices, the retraction amount of a steel strand in the tensioning construction can be reduced, and the loss of prestress can be reduced; and compared with existing low-retraction anchorage devices, the low-retraction prestressed anchorage device has the advantages of saving work anchorage plate materials and being convenient to process. According to a tensioning method of the low-retraction prestressed anchorage device, the length of a brace angle is spirally adjusted after first-time tensioning, then second-time tensioning is carried out, and the retraction amount of the steel strand during first-time tensioning is eliminated by spirally adjusting the pressure-bearing nut; and there is no need to disassemble a jack, mount the brace angle, mount a pull rod and the like between first-time tensioning and second-time tensioning, the tensioning process is greatly simplified, and the tensioning construction operation is facilitated.
一种低回缩预应力锚具，包括工作锚板、工作夹片和承压螺母；对比普通锚具，可以降低张拉施工中钢绞线的回缩量，减少预应力损失；对比现有低回缩锚具拥有节约工作锚板材料、加工方便的优点。低回缩预应力锚具张拉方法，第一次张拉后螺旋调整撑角长度，然后进行第二次张拉，通过螺旋调整承压螺母，消除第一次张拉钢绞线的回缩量；两次张拉中间不需要拆卸千斤顶、安装撑角、安装拉杆等过程，张拉过程大大简化，利于张拉施工作业。
The invention discloses a low-retraction prestressed anchorage device. The low-retraction prestressed anchorage device comprises a work anchorage plate, work clips and a pressure-bearing nut. Comparedwith common anchorage devices, the retraction amount of a steel strand in the tensioning construction can be reduced, and the loss of prestress can be reduced; and compared with existing low-retraction anchorage devices, the low-retraction prestressed anchorage device has the advantages of saving work anchorage plate materials and being convenient to process. According to a tensioning method of the low-retraction prestressed anchorage device, the length of a brace angle is spirally adjusted after first-time tensioning, then second-time tensioning is carried out, and the retraction amount of the steel strand during first-time tensioning is eliminated by spirally adjusting the pressure-bearing nut; and there is no need to disassemble a jack, mount the brace angle, mount a pull rod and the like between first-time tensioning and second-time tensioning, the tensioning process is greatly simplified, and the tensioning construction operation is facilitated.
一种低回缩预应力锚具，包括工作锚板、工作夹片和承压螺母；对比普通锚具，可以降低张拉施工中钢绞线的回缩量，减少预应力损失；对比现有低回缩锚具拥有节约工作锚板材料、加工方便的优点。低回缩预应力锚具张拉方法，第一次张拉后螺旋调整撑角长度，然后进行第二次张拉，通过螺旋调整承压螺母，消除第一次张拉钢绞线的回缩量；两次张拉中间不需要拆卸千斤顶、安装撑角、安装拉杆等过程，张拉过程大大简化，利于张拉施工作业。
Low-retraction prestressed anchorage device and tensioning method
一种低回缩预应力锚具及张拉方法
WU LIXIN (author)
2020-08-04
Patent
Electronic Resource
Chinese
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