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   承载比 在 水利水电工程 分类中 的翻译结果: 查询用时:0.012秒
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  specific bearing capacity
The investigated types of bored-cast-in-place tapered piles with a taper angle of 1°20', 2°, and 2°40' have a specific bearing capacity which exceeds by 20-30% the specific bearing capacity of cylindrical piles having the same length.
      


The working condition and failure mechanism of the combination bearing capacity of reinforced conerete enveloped steel spiral case with and without cushionlayer for hydropower station, under water passure, is presented in this paper. Twomodel tests of large scale reinforced concrete enveloped integral spiral case made ofartificial materials were conducted. The stresses and bearing capacity ratios werecompared, and the function and effect of the layer were analysed. The study leadsto further understanding of...

The working condition and failure mechanism of the combination bearing capacity of reinforced conerete enveloped steel spiral case with and without cushionlayer for hydropower station, under water passure, is presented in this paper. Twomodel tests of large scale reinforced concrete enveloped integral spiral case made ofartificial materials were conducted. The stresses and bearing capacity ratios werecompared, and the function and effect of the layer were analysed. The study leadsto further understanding of working state and reliablity of reinforced concrete enveloped steel spiral case, as well as the effectness of ZJ corkwood layer of No. 4 generating unit in longyangxia hydropower station. The spiral case has been safely working since 1988.

本文通过两个大比例尺仿真材料蜗壳整体结构模型试验成果,介绍了在内水压力作用下有、无垫层时钢蜗壳与钢筋混凝土联合承载的工作情况和破坏机理.对比了两种条件下各层材料的应力值和承载比,分析了垫层的作用和效果采用中间成果,龙羊峡水电站4#机蜗壳包裹了聚胺脂软木,已安全运行了3年。

In this paper,a new structure—combined pressure pipeline in hydropower station is studied in theory.It's stress and load-bearing ratio are calculated for more than three hundreds condition,this new structure will provide a new method to overcome difficuties in huge pressure pipeline.

对压力引水管道的新型结构——组合套管式引水管道进行了初步的理论分析,并对300多种方案进行了应力及承载比的分析计算,为目前巨型压力引水管道面临的诸多困难,开辟了新的途径

The effects of elastic modulus,thickness and placement extent of cushion layer on bearing capacity of spiral case are analyzed using 3 D non linear FEM.It is found that the concentration of stress can be mitigated if the cushion layer at the vicinity of upper fix ring is canceled.Furthermore,if the cushion is extended to the position of 20°-30°,the stress of the surrounding concrete will be greatly improved and the crack depth will be reduced.It is suggested that the ratio of thickness to elastic modulus can...

The effects of elastic modulus,thickness and placement extent of cushion layer on bearing capacity of spiral case are analyzed using 3 D non linear FEM.It is found that the concentration of stress can be mitigated if the cushion layer at the vicinity of upper fix ring is canceled.Furthermore,if the cushion is extended to the position of 20°-30°,the stress of the surrounding concrete will be greatly improved and the crack depth will be reduced.It is suggested that the ratio of thickness to elastic modulus can be used as an important parameter in the design of cushion layer and the optimal value is recom mended.

应用三维非线性有限元研究了水电站蜗壳垫层的弹性模量、厚度和铺设范围对承载比的影响。为减轻钢蜗壳在上蝶边处的应力集中 ,提出在蝶形边附近一定范围内不设垫层。如果垫层铺到 180° ,则恰好该处外包混凝土较薄 ,易产生混凝土贯穿裂缝 ,若将垫层下延 2 0°~ 3 0° ,则该处外包混凝土变厚 ,可改善垫层末端混凝土受力状态。建议将垫层的厚度与弹模之比作为垫层设计的一个参考指标 ,并给出厚度与弹模的优化比值 ,可适用于一定PD值范围的蜗壳 ,供工程设计参考

 
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