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1)  prestressed duct
预应力孔道
1.
To counter the insufficiency of numerical analysis for long-span bridge pier top block,study of key factors of the numerical analysis such as unit selection,mesh generation,mesh density,model simplification, prestressed duct effects,and submodel selection scope was carried out.
针对目前大跨径桥梁墩项块数值模型建立及分析方法上的不足,研究了大跨径桥梁墩顶块数值分析的单元选择、网格划分、网格密度、模型简化、预应力孔道影响及子模型选取范围等关键问题。
2.
Before prestressed duct grouting,using vacuum pump to exhaust air in the duct,made the duct a vacuum status,then using grout machine to pour cement mortar in the prestressed duct to ensure the saturation and compaction of cement mortar,the final construction quality can be guaranteed.
在向预应力管道内压浆前,利用真空泵抽吸管道内空气,使管道内基本达到真空状态,同时利用压浆机将水泥浆压入预应力孔道,从而保证孔道内水泥浆的饱满度与密实度,最终施工质量得到保证。
2)  vertical pre-stressed duct
竖向预应力孔道
1.
The weakening of web sections by vertical pre-stressed ducts on two actual pre-stressed concrete continunous box girder bridges is analyzed.
以两座预应力混凝土连续箱梁桥为工程背景,分析竖向预应力孔道对腹板截面的削弱。
3)  transverse prestress duct
横向预应力孔道
4)  two-way ducts for tendons or strands
双向留设预应力筋孔道
5)  preparing pipe
预应力管道
1.
Shallow to talk prevention measure of prestress preparing pipe pressing grout common disease
浅谈后张预应力管道压浆通病的预防措施
6)  post-tensioning high performance grouts
后张预应力孔道高性能灌浆料
补充资料:垂直孔道
分子式:
CAS号:

性质:又称实验孔道(experimental channel)。反应堆辐照孔道的一种。供进行实验研究用,通过它将各种实验样品放入堆内,由堆芯产生的中子或γ射线对其进行辐照。垂直孔道有干孔道和湿孔道,多用于堆内样品照射。详细用途见水平孔道。

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