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A platform for research: civil engineering, architecture and urbanism
Large-span continuous rigid frame prestress construction method
The invention provides a large-span continuous rigid frame prestress construction method. The large-span continuous rigid frame prestress construction method comprises the following steps that (1) a prestress pipeline is positioned; (2) blanking and bundling; (3) strand pulling; (4) prestressing tendons are tensioned; and (5) pre-stressed grouting. By positioning the prestressed pipeline, the position accuracy of the corrugated pipe is ensured, and the mounting quality of the prestressed pipeline is effectively improved. During prestressed strand pulling construction, the steel strands and the anchorage devices are numbered, and the steel strands are constructed in a whole strand combing and pulling mode, so that the steel strands are parallel and are not wound, the stress of the steel strands is uniform, and the friction resistance between the steel strands is reduced. Tensioning of the prestressing tendons adopts double control of tensioning force and extension amount and main control of the tensioning force, the influence of inelastic deformation of the steel tendons is removed, the error between the actual extension amount and the theoretical extension amount is controlled within +/-6%, the qualified rate of tensioning control stress and the same-tendon non-uniformity reaches 100%, and the large-span continuous rigid frame prestressing construction requirements are met.
本发明提供了一种大跨度连续刚构预应力施工方法，包括以下步骤：步骤1）预应力管道定位；步骤2）下料编束；步骤3）穿束；步骤4）预应力束张拉；步骤5）预应力压浆。本发明通过对预应力管道定位，确保波纹管的位置准确，有效的提升预应力管道安装质量。在预应力穿束施工时，对钢绞线及锚具进行编号，将钢绞线以整束梳束穿束的方式进行施工，从而使每根钢绞线之间平行，不缠绕，使钢绞线受力均匀，降低钢绞线之间的摩阻。预应力束的张拉采用张拉力与引伸量双控，张拉力主控，去除了钢束的非弹性变形影响，将实际引伸量与理论引伸量的误差控制在±6%以内，使张拉控制应力与同束不均匀度合格率达到100%，满足大跨度连续刚构预应力施工要求。
Large-span continuous rigid frame prestress construction method
The invention provides a large-span continuous rigid frame prestress construction method. The large-span continuous rigid frame prestress construction method comprises the following steps that (1) a prestress pipeline is positioned; (2) blanking and bundling; (3) strand pulling; (4) prestressing tendons are tensioned; and (5) pre-stressed grouting. By positioning the prestressed pipeline, the position accuracy of the corrugated pipe is ensured, and the mounting quality of the prestressed pipeline is effectively improved. During prestressed strand pulling construction, the steel strands and the anchorage devices are numbered, and the steel strands are constructed in a whole strand combing and pulling mode, so that the steel strands are parallel and are not wound, the stress of the steel strands is uniform, and the friction resistance between the steel strands is reduced. Tensioning of the prestressing tendons adopts double control of tensioning force and extension amount and main control of the tensioning force, the influence of inelastic deformation of the steel tendons is removed, the error between the actual extension amount and the theoretical extension amount is controlled within +/-6%, the qualified rate of tensioning control stress and the same-tendon non-uniformity reaches 100%, and the large-span continuous rigid frame prestressing construction requirements are met.
本发明提供了一种大跨度连续刚构预应力施工方法，包括以下步骤：步骤1）预应力管道定位；步骤2）下料编束；步骤3）穿束；步骤4）预应力束张拉；步骤5）预应力压浆。本发明通过对预应力管道定位，确保波纹管的位置准确，有效的提升预应力管道安装质量。在预应力穿束施工时，对钢绞线及锚具进行编号，将钢绞线以整束梳束穿束的方式进行施工，从而使每根钢绞线之间平行，不缠绕，使钢绞线受力均匀，降低钢绞线之间的摩阻。预应力束的张拉采用张拉力与引伸量双控，张拉力主控，去除了钢束的非弹性变形影响，将实际引伸量与理论引伸量的误差控制在±6%以内，使张拉控制应力与同束不均匀度合格率达到100%，满足大跨度连续刚构预应力施工要求。
Large-span continuous rigid frame prestress construction method
一种大跨度连续刚构预应力施工方法
WANG BO (author) / JU RUNZE (author) / BAI YANG (author) / WANG WEI (author) / ZHA DAOHAN (author) / ZHOU KAIKAI (author) / HUO YONGHENG (author) / HAN CHUNSHAN (author)
2024-07-09
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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