pretensioned bolt 中文意思是什麼

pretensioned bolt 解釋
預張力錨桿
  • pretensioned : 先張的
  • bolt : n 1 螺釘，螺栓。2 （門窗等的）插銷；閂，鎖簧。3 箭，矢；弩箭；【軍事】槍機，槍栓。4 電光，閃電。5...
  1. The distribution features of the stress fields caused by the pretensioned stresses of bolts and cables, and the effects of steel strip to the bolt pretensioned stress diffusion were analyzed through finite difference numerical modelling

    採用有限差分數值計算軟體分析了不同預應力下錨桿、錨索產生的應力場分佈特徵，以及鋼帶對錨桿預應力擴散的作用。
  2. The new concepts, such as the active supporting coefficient, the coefficient of strength utilization, the coefficient of pretensioned bolt length, the effective compressive zone, the coefficient of pretensioned stress diffusion, the framework and mesh structure of the effective compressive zone, and the critical supporting stiffness were put forward

    提出錨桿主動支護系數、強度利用系數、預應力長度系數、有效壓應力區、預應力擴散系數、有效壓應力區骨架網狀結構及臨界支護剛度等概念。
  3. The underground tests show that the deformation and roof delamination of roadway surrounding rock can be effectively reduced by means of great increase of the bolt pretensioned stress, the steel strip plays an important role in the rock bolting system, and there exsits a critical value for pretensioned stress, up to or beyond which the rock bolting can effectively control the deformation and damage of the surrounding rock

    井下試驗表明，大幅度提高錨桿預應力可顯著減小巷道圍巖變形，有效控制頂板離層；鋼帶在預應力支護系統中起非常重要的作用；錨桿預應力存在臨界值，達到或超過臨界值后錨桿支護可有效控制圍巖變形與破壞。
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