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| New method of determining design parameters of inclined shaft for oil gas pipeline crossing along soil slope |
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WANG Zhi yin1, YUAN Hong hu1, WANG Yi1, ZENG Zhi hua2, MA Lan ping2
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(1.Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, China University of Petroleum, Beijing 102249, China;2.China Petroleum Pipeline Engineering Corporation, Langfang 065000, China)
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| Abstract: |
| Based on the stability analysis theory of slope, a new method of determining design parameters for traversing the loess gully or slope in pipeline well was presented. In the method, the stability analysis was firstly carried out to find the shape and the position of the potential dangerous sliding surface of slope. Then the design parameters of inclined or vertical pipeline well, such as the safety cut, the length or depth and the limit obliquity of well and the length of horizontal opening, were determined. The corresponding formulas for calculating design parameters were established. The results indicate that if only the pipeline well is located outside the potential dangerous sliding surface of slope and the construction influence is fully considered, the excavating effect on the slope stability and the pipeline safety can be neglected in theory. The new method is useful and of shortcut, and it can be used for determining design parameters for traversing the loess gully or slope. |
| Key words: design parameters pipeline crossing inclined shaft safety cut slope stability |
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