The successful alternative was the cast - in - place segmental prestressed concrete box girder.
最后采用的方案是分段现浇的预应力混凝土箱形梁.
Cracking is almost completely avoided in prestressed concrete.
预应力混凝土几乎可以完全避免出现裂缝.
Initially all structures were prestressed by high - strength bars.
起初,每个桥梁都是通过 高强 钢筋施加预应力的.
Suitable calibrated dynamometers were used to control the pull in the prestressing cables.
用合适的率定过的量测计控制预应力钢索的拉力.
Later other prestressing Methods : With parallel wire or strand tendons were also used.
后来,又使用其它的预应方法,如利用平行钢丝或钢绞线施加预应力.
After closure , continuity tendons would be provided in the bottom of the box.
合拢以后, 箱梁底部布置有连续的预应力筋.
The prestressing influence confficients depend on the geometry of the concrete structure only.
预应力影响系数仅取决于混凝土结构的几何形状.
The prestressed concrete sheet has higher crack load and smaller crack width.
对织物施加预应力后,薄板的开裂荷载提高,裂缝宽度减小.
Pre - tensioned bolts support is an effective way to improve joint roof stability.
预应力锚杆支护,是提高煤巷节理顶板稳定性的有效方法.
Prestressed enterprises specializing in the production of plastic and metal bellows.
企业专业生产预应力塑料及金属波纹管.
Pre - stress must be inflicted during the cable net construction.
索网在建设时必须施加预应力.
It is found that temperature has significant influence to transducer.
实际测量了预应力对换能器几个重要指标的影响.
The vertical tendon had to be prestressed twice to ensure effective prestressing.
竖向预应力应两次张拉以保证有效预应力.
Long - term creep effect of PLC member was studied for the first time.
首次研究了预应力轻集料混凝土构件的长期徐变效应.
The changes of prestress and cracks with temperature increasing are analysed.
对裂缝的出现和预应力的变化规律作了相应的阐释.