breast wall造句

• Breast wall effect of double - pipe protecting borehole wall blasting and its functional mechanism
  光面护壁爆破的护壁效果及作用机理探讨
• Introduced by prestressed pier in the gate of spillway in xiao xia hydroelectric power station , the text reasonably established 3 - d finite elements mechanic model by the advanced finite elements popular in the world which can expediently impose tension of anchor funicular at its place . it also considered possible diversified combination of loading , and indicated that the effect of its prestressed action is fruitful compared with its conventional counterpart by study of mechanic calculation in comparison . as a result , it vastly improved burdening state of pier . by analysis of 3 - d finite element method , it also gained the stress result indifferent boundary conditions such as breast wall joint support and fixed support , and the displacement result in diversified loading combination . those results gained the instructive and reference value in design of prestressed pier
  本文结合黄河小峡水电站泄洪闸预应力闸墩这一工程实践，采用国际上已成熟的有限元方法，合理地建立了预应力闸墩的三维有限元模型，该模型可方便地按预应力锚索的点位施加锚索预张拉力，考虑了可能发生的多种荷载工况组合，并与无预应力闸墩结构进行了对比分析研究，指出其预应力效果是明显的，可以大大改善闸墩结构的受力状态，通过三维有限元分析，还得到了胸墙简支、固端不同情况下的应力成果和各荷载下的位移成果，这些成果的取得对预应力闸墩的设计具有一定的指导和参考价值。
• Under the function of big pressure and dynamic load , the grains may be moved which may cause the soil body distortion . at present , the relatively ripe methods of drill in gravel layer are mostly double - wall drill pipe reverse circulation drilling , auger stem breast wall drilling and down - the - hole hammer follow down drilling
  论文根据jsl ? 30型砾石钻机潜孔锤同心跟管钻具结构,采用程序计算得到了钻杆内各深度处压力分布、钻头压力降、环形空间压力分布及空气流速分布。
• The retaining wall reclining on the slight slope built on soft foundation is usually used in protecting the shore of river , the contradiction between the lack of impartiality in stress of the base and the small stress allowed by the foundation as well as the lack of stabilization of the breast wall is a hard nut to crack in the engineering . in the paper , a tenon - base is added under the base of the retaining wall , on the study of the choice of the parameters and formulas used in calculation and the research of theory used in calculation , method used to deal with the load , etc , the writer gives a way to crack the nut mentioned above paragraphs and presents a qualitative and quantitative analysis about them , such as the equivalent inner friction - angle ( d ) and the passive press of the clay ( ep ) , etc . in the end of the paper , using modern optimization method , a design of the retaining wall reclining on the slight slope built on soft foundation is done , the result is economical , and accords with the fact
  软基上的仰斜式挡土墙在水利工程河道护岸中经常遇到，仰斜式挡土墙基底偏心应力较大和软基土地基容许承载力偏小的矛盾以及挡土墙抗滑稳定不足是工程中难以解决的难题。本文在对仰斜式挡土墙设计中有关计算参数的选择、公式的选用应该注意的问题进行了研究，对河道护岸软基础上的仰斜式挡土墙采用凸榫基础处理的方法，就其计算理论、设计验算中各荷载的具体处理方法进行了较为细致的研究，提出了解决软基础上的水工仰斜式挡土墙难以解决的难题的方法，并对有水情况下粘土等效内摩擦角_ d 、凸榫被动土压力e _ p等在计算中的取值提出了定性和定量的分析。最后利用现代优化方法对软基础上的水工仰斜式挡土墙进行了结构优化设计，得出了符合实际的结果，与其它重力式挡土墙形式进行比较，取得了明显的经济效益。