新型平面应变高强井壁实验加载装置的研制

发布时间：2018-03-26 01:30

本文选题：新型井壁实验加载装置　切入点：高强井壁结构　出处：《安徽理工大学》2017年硕士论文

【摘要】：因浅部煤矿资源日益枯竭,煤矿开采渐渐转向深部发展,建设新井时立井井筒穿过的冲积层越来越厚,为抵抗施加在井筒上的巨大水土压力,必须提高井筒的承载能力。平面应变高强井壁实验加载装置广泛应用于钢筋混凝土井壁结构实验方面的研究,但原有的实验加载装置承载能力有限,不能完全满足高强井壁结构实验要求,为此需研制一种新型平面应变高强井壁实验加载装置。原有的平面应变高强井壁实验加载装置内径为950mm,壁厚为100mm,由于内径较小,其最大承载能力只有40MPa。为了设计出内径为1100mm,且最大承载能力为60MPa的新型井壁实验加载装置,通过理论计算得出装置的壁厚为220m。采用在加载装置中间部位增加一道加强肋的方法对其进行优化设计,使其应力分布更加合理,并通过数值计算得出肋的最优尺寸。结果表明,新型平面应变高强井壁实验加载装置在60MPa的设计荷载作用下产生的弹性变形很小,满足承载力要求。进一步分析得出,当肋厚为110mm、高度为160mm时,既能使装置应力分布更加均匀,又能满足铸造工艺和使用要求。
[Abstract]:Because of the depletion of shallow coal resources and the gradual shift of coal mining to deep development, the alluvium passing through the shaft of the shaft during the construction of the new well is becoming thicker and thicker, in order to resist the huge pressure of water and soil on the shaft. It is necessary to improve the bearing capacity of wellbore. The experimental loading device of plane strain high strength shaft lining is widely used in the experimental research of reinforced concrete shaft lining structure, but the original experimental loading device has limited bearing capacity. It is necessary to develop a new type of plane strain high strength sidewall experimental loading device. The original loading device is 950mm in diameter and 100mm in thickness. Its maximum bearing capacity is only 40 MPA. In order to design a new type of shaft wall experimental loading device with an inner diameter of 1100mm and a maximum bearing capacity of 60MPa, The wall thickness of the device is 220m through theoretical calculation. The method of adding a stiffening rib in the middle of the loading device is used to optimize the design to make the stress distribution more reasonable, and the optimum size of the rib is obtained by numerical calculation. The new plane-strain high-strength shaft wall experimental loading device produces little elastic deformation under the action of 60MPa design load, which meets the requirements of bearing capacity. Further analysis shows that when the rib thickness is 110mm and the height is 160mm, the stress distribution of the device can be more evenly distributed. It can also meet the requirements of casting process and application.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD352

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