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寿县合兴浅谈钢结构工程中质量问题的缺点

发布时间:2015-8-27 10:56:30 浏览次数:1042
1 、可变性
钢结构工程施工质量问题还将随着外界变化和时间的延长而不断地发展变化,质量缺陷逐渐体现。例如,钢构件的焊缝由于应力的变化,使原来没有裂缝的焊缝产生裂缝:由于焊后在焊缝中有氢的活动的作用便可产生延迟裂缝。又如构件长期承受过载,则钢构件要产生下拱弯曲变形,产生隐患。
2、复杂性
钢结构工程项目施工质量问题的复杂性,主要表现在引发质量问题的因素繁多,产生质量问题的原因也复杂,即使是同一性质的质量问题,原因有时也不一样,从而质量问题的分析、判断和处理增加了复杂性。例如焊接裂缝,其既可发生在焊缝金属中,也可发生在母材热影响中,既可在焊缝表面,也可在焊缝内部;裂缝走向既可平行于焊道,也可垂直于焊道,裂缝既可能是冷裂缝,也可能是热裂缝;产生原因也有焊接材料选用不当和焊接预热或后热不当之分。
3、频发性
由于我国现代建筑都是以混凝土结构为主,从事建筑施工的管理人员和技术人员对钢结构的制作和施工技术相对比较生疏,以民工为主的具体施工人员更不懂钢结构工程的科学施工方法,导致施工过程中的事故时常发生。
4、严重性

钢结构工程项目施工质量问题的严重性表现在:一般的,影响施工顺利进行,造成工期延误,成本增加,严重的,建筑物倒塌,造成人身伤亡,财产受损,引起不良的社会影响。


1, the variability

Steel structure engineering construction quality problems will also change as the outside world and time constant development and change, with the extension of quality defects gradually. Weld steel members, for example, due to the change of the stress, make originally not cracks in weld cracks: due to the hydrogen in weld after welding the effect of activity can generate delay fracture. And as component under overload for a long time, the steel members to produce under the arch bending deformation, produce risk.

2, complexity,

The complexity of the steel structure project construction quality problems, mainly in cause there are many factors of quality problems, causes of quality problem is complicated, even in the quality problem, because sometimes is different also, thus quality problem analysis, judgement and dealing with increased complexity. Welding cracks, for example, it can occur in the weld metal and can also occur in the parent metal thermal effects, as well as on the surface of weld, can also be within the weld; Fracture trend can be parallel to the weld bead, can also be perpendicular to the weld, is may be cold cracks, also may be hot crack; Cause there are improper welding material selection and welding after preheating, or hot improper points.

3, frequent

Because our country modern buildings are concrete structure is given priority to, engaged in construction management and technical personnel for production and construction of steel structure technology is relatively unfamiliar, mainly migrant workers of the specific construction personnel more don't understand the steel structure engineering construction method of science, lead to the accidents often occur in the process of construction.

4, severity

The seriousness of the steel structure engineering project construction quality problem displays in: general, affect the construction smoothly, causing delays and cost increases, serious, building collapsed, causing life or personal injury, property damage, caused adverse social impact.



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