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In this paper, the applicability of the hyperbolic method to predict settlements of sabkha formations was investigated. Conventional and long-term consolidation tests were conducted, and the fit of the experimental data to a rectangular hyperbolic relationship was examined. The validity of the hyperbolic form as a representation of the settlement-time response of sabkha soils was further ascertained by analysing settlement records measured under an instrumented test embankment. The laboratory results indicated that the settlement-time behaviour could reasonably be represented by the hyperbolic relationship. Settlement estimates determined as the inverse of the slope of the initial linear segment multiplied by the slope of the theoretical curve, or obtained based on the radial slopes corresponding to 50% and 90% consolidation points, all underestimated the observed total settlements. However, the inverse of the slope of the final linear segment of the hyperbolic curve gave excellent estimates of the observed total settlements. The agreements between the predicted and observed in situ ultimate primary consolidation settlements are considered reasonable. Finally, except when the hyperbolic plot follows a straight line, the use of the hyperbolic method for prediction of total settlements of sabkha soils with prominent secondary compression behaviour has been shown to be both uncertain and impractical.  相似文献   
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Geotechnical and Geological Engineering - Predicting the penetration rate of tunnel boring machine (TBM) is a complex and challenging task that plays a crucial role in the schedule planning and...  相似文献   
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Photometric observation of the eccentric eclipsing binary V459 Cas (e = 0.0244) was performed to find a new rate of apsidal motion. Also the advance of the periastron is calculated theoretically by taking into account the Newtonian (classical) and general-relativistic effects according to physical and orbital parameters of the system. A new observed rate of apsidal motion of 19.8/100 yr is computed which is not in agreement with the one reported earlier. Meanwhile a theoretical value of 2.64/100 yr is obtained which is 7.49 times smaller than the observed one.  相似文献   
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