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灰坑检查坑結构本身就属于极易断裂的条形建筑物,加以外界荷載复杂,列車通过的震蕩,在使用中又受到高溫炉灰与机車放水等侵蝕作用,因而产生裂紋,混凝土脫落,鋼軌扣件松动,排水堵塞。庫內检查坑中由于生产作业影响,又产生混凝土棱角及坑側地面損坏等情况,影响行車安全与使用年龄,因此在設計中对建筑材料的选择与建筑构造的改善,应根据其修建地点与使用条件的不同,予以妥善解决,以求得良好的使用性能。一、坑牆混凝土剝落破損 与建筑材料选择在我們所調查的30多座庫外灰坑检查坑中,90％以上的坑牆混凝土均脫落破損。其位置一般都在坑的清灰部位,破損剝落深度达50～100毫米,卵石或鋼筋外露,破損面积占坑壁30～60％。其中尤以某机車厂前毛
The crater check pit structure itself belongs to the strip-shaped building which is easily broken. Due to the complex external loads and the train passing shock, it is also eroded by the high temperature furnace dust and locomotive water drainage during use. Cracks and concrete fall off, Loose rail fasteners, drain plugging. Due to the impact of production operations in the pit and the occurrence of concrete edges and ground damage on the pit side which affect the safety of driving and the age of use, the choice of building materials and the improvement of building structure in the design should be based on the location of the construction site And the use of different conditions, be properly resolved in order to achieve good performance. First, the pit wall concrete flaking damage and choice of building materials In our survey of more than 30 pits outside the ash pit inspection, more than 90% of the pit wall concrete are broken off. The location of the pit are generally clean areas, the depth of damage spalling up to 50 to 100 mm, exposed pebbles or bars, broken area accounted for 30 to 60% of the pit wall. Especially in front of a motorcycle factory hair