Research On Creep Character Of Composite Shaft Lining Structure Of High Strength Concrete And Double Steel Cylinders In Especially Thick Alluvium

Creep is a kind inherent property of the concrete material and creep problem was put forward since the concrete have been applied. Then the researches about creep mechanism and creep effect in concrete structures have its constant thorough and development accompanying with the variety innovatation of the concrete unceasingly, new structure research and development of concrete. But so far the creep problem is still emphasis and difficulty in concrete combination structure because of the complexity and levity influence factor, the difference creep theoretical and the abundance creep mathematics model.Recently, with the new vertical shaft of coal mine cross-over special thick alluvium,the composite boring shaft lining structure of high strength concrete and double steel cylinders, is more and more widespread availability.But in past ,creep was not considerated when researching this kind of shaft structure and also lacks creep character now. In order to clarify this kind of shaft structure creep character ,improve designing reliability , prevent to present the unsafe condition, design it economically,reasonablely,safely and reliablely, avoid project questions which cause by creep, This article has conducted system's research on creep of this kind shaft throught the theoretical analysis and the numerical calculus.In the aspect of theoretical analysis , according to creep mechanism and computation theory, under level and vertical load function, infering construction relations of high strength concrete shaft and stress formulas of the concrete and steel cylinders ,which can help analysising creep influencing factors; In the aspect of numerical simulation, establishing the three dimensional shaft mechanical models, carrying on the numerical simulation analysis about double steel cylinder and high strength concrete shaft through using the ANSYS software, then we find that the result of creep computation and the result by theoretical analysis is anastomotic, which indicate that researching shaft lining by numerical simulation is feasible. This paper's conclusions can be used for creep ansysis and computation about shaft lining structure of high strength concrete and double steel cylinder and referrenced by shaft design .