丹江口大坝加高工程右岸转弯坝段横向锯缝施工

Horizontal Saw Seam Construction at Dam Turning Section on Right Bank of Danjiangkou Dam Heightening Project

丹江口水利枢纽右岸混凝土坝转弯坝段在平面上呈凸向下游的反弧形,初期工程中横缝进行了灌浆。在气温影响下,夏季坝体被挤压向下游变形,坝基上游端部受拉,扬压力增大;冬季挤压消失、变形恢复常态。为消除转弯坝段长期因受温度周期性变化而产生的坝体稳定及应力不利的变形,大坝加高前采取了消除横缝间连接的锯缝施工方案,解决了转弯坝段反向变形问题,施工取得了良好效果。

Concrete dam turning section on right bank of the Danjiangkou Dam Project shows anti-arc shape of convex to the downstream on the plane, Influencing by temperature, the dam was squeezed to the lower reaches of deformation in summer, deformation restored normality in winter. In order to eliminate deformation of darn turning section because of cyclical changes of temperature, saw seam construction program of eliminating link between the joints was taken before heightening darn, resolving problem of reverse deformation of the dam turning section, the construction has achieved good results.