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本文采用数值分析以检验堆石坝的锚杆在施工期间和漫顶溢流期间所产生的负荷;同时以极限平衡分析所得到的负荷加以比较。加强堆石坝的下游坡面,使其能够在部分完工的坝体上宣泄施工洪水。此项技术在提供坝顶分洪措施方面具有重大的经济意义。加强的结构包括:坡面设置钢筋网以防溢流冲刷。采用长水平锚杆和钢筋网相连,以防渗透压力引起的深层滑动。长水平锚杆的费用相当可观,而坡面钢筋网的设计和施工对于堆石坝的正常运行至关重要。锚杆通常采用极限平衡分析来进行设计,或用修正的园弧滑动,或用滑动楔体。然而该法未考虑施工期间锚杆的应力,也未考虑在溢流期间堆石的应力应变特性。
In this paper, numerical analysis is used to test the load of the rock bolts of the rockfill dam during the construction and overpressure relief. At the same time, the loads obtained by the limit equilibrium analysis are compared. The downstream slope of the rockfill dam should be strengthened to enable it to vent construction floods on partially completed dam bodies. This technology is of great economic importance in providing dam roof diversion measures. Strengthen the structure include: set steel mesh slope to prevent overflow erosion. The use of long horizontal bolts and steel mesh connected to prevent the deep pressure caused by osmosis. The cost of a long horizontal anchor is considerable, while the design and construction of a steel mesh on a slope is crucial to the proper operation of a rockfill dam. Bolts are usually designed using a limit equilibrium analysis, either with a modified circular arc or with sliding wedges. However, this method does not consider the stress of the anchor during construction, nor does it consider the stress-strain behavior of rockfill during the overflow.