两河口水电站压力分散型锚索差异张拉计算与分析

Calculation and analysis of differential tension of pressure dispersionanchor cables at Lianghekou Hydropower Station

摘要:

差异张拉法能够有效提高压力分散型预应力锚索的张拉作业工效，此工艺在两河口水电站泄水建筑物进口边坡中成功应用。为保证张拉至110%设计荷载时钢绞线平衡受力，对差异补偿荷载进行了计算与分析，发现考虑预紧阶段已产生的差异量是受力平衡的关键，并对单根差异补偿和整体张拉阶段进行了简要的介绍和分析。

Abstract:

The differential tensioning method can effectively improve the tensioning efficiency of the prestressed anchor cable with pressure dispersion, which has been successfully applied in the slope reinforcement for the drain building of Lianghekou Hydropower Station. In order to ensure the balanced load of the steel strand when tension reaches 110% of the design load, the differential compensation load is calculated and analyzed, and it is found that the difference generated in the pretightening stage is key to balanced load. The single differential compensation and the overall tension stage are briefly introduced and analyzed.