摘要
详细介绍了青藏公路桥涵混凝土耐久性调查情况以及室内混凝土耐久性试验、现场试件暴露试验 ,认为青藏铁路格—拉段混凝土耐久性破坏成因将是饱水条件下经受频繁冻融而导致破坏。给出了混凝土的抗冻融耐久性指标、抗渗能力指标、Cl-渗透系数控制值等。
Based on investigation on durability of concrete bridges and culverts on Qinghai\|Tibet Highway, and indoor durability test of concrete and exposed test of specimen, it is regarded that frequent freezing and thawing under saturation condition shall be the cause degrading the durability of concrete structures on Golmud\|Lhasa section of Qinghai\|Tibet Railway. The freezing and thawing resisting durability index, permeability resistance index, and control value for permeability coefficient is given. A series of technical measures to improve durability of concrete structures are put forward.
出处
《铁道建筑技术》
2001年第6期51-55,共5页
Railway Construction Technology
关键词
高原铁路
多年冻土
混凝土
耐久性
冻融
plateau railway, permafrost, concrete, durability, freezing and thawing
