Application of tests of goodness of fit in determining the probability density function for spacing of steel sets in tunnel support system

سال انتشار: 1394
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 582

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شناسه ملی سند علمی:

JR_IJMGE-49-2_003

تاریخ نمایه سازی: 15 شهریور 1395

چکیده مقاله:

One of the conventional methods for temporary support of tunnels is to use steel sets with shotcrete. The nature of a temporary support system demands a quick installation of its structures. As a result, the spacing between steel sets is not a fixed amount and it can be considered as a random variable. Hence, in the reliability analysis of these types of structures, the selection of an appropriate probability distribution function of spacing of steel sets is essential. In the present paper, the distances between steel sets are collected from an under-construction tunnel and the collected data is used to suggest a proper Probability Distribution Function (PDF) for the spacing of steel sets. The tunnel has two different excavation sections. In this regard, different distribution functions were investigated and three common tests of goodness of fit were used for evaluation of each function for each excavation section. Results from all three methods indicate that the Wakeby distribution function can be suggested as the proper PDF for spacing between the steel sets. It is also noted that, although the probability distribution function for two different tunnel sections is the same, the parameters of PDF for the individual sections are different from each other.

نویسندگان

Farnoosh Basaligheh

Department of Civil Engineering, Shahrood University of Technology, Shahrood, Iran

Ali Keyhani

Department of Civil Engineering, Shahrood University of Technology, Shahrood, Iran