With the progressive proceeding of energy pipeline construction, long-distance petroleum and natural gas transmission pipelines were designed to pass through the mountain area of Midwest China, part of them have been threatened by severe landslide hazard. Therefore, the effective control scheme for the exiting pipelines across landslide area has been increasingly interested. A typical landslide in Western China area was taken as an example, from which the interaction model of landslide and pipeline was performed. On the base of the landslide characteristics analysis and numerical modeling, two kinds of typical control schemes, including anti-sliding piles and anchors supporting, were presented to carry out a comparative analysis and evaluation for landslide control. The results show that the scheme involving anti-sliding pile is the better scheme, whose cost and technical requirement are lower than that of anchors supporting scheme in the aspects of cost and the feasibility of construction. This study can provide a scientific basis for the optimal control scheme determination for the landslides with pipeline underground crossing in Western China.
This paper presents an effect method to reveal the load transferring and sharing law of anti-sliding piles under different isosceles trapezoid sections. Three kinds of cross-section, including the rectangle and two typical kinds of isosceles trapezoid cross-section, were carried out the load transferring and sharing tests on the basis of soil arching analysis by using the numerical modelling method. The results show that the anti-sliding piles row play an important role in resisting the driving force of the landslide, and the outer-isosceles trapezoid cross-section piles can reduce the driving force of the sliding mass in front of the piles to the maximum extent. The monitoring positions where more close to the piles transfer larger driving force from the soil to the piles. Moreover, the mechanical mechanism the anti-sliding piles with outer-isosceles trapezoid cross-section is end-bearing pattern, while the anti-sliding piles with rectangle and outer-isosceles trapezoid cross-section are end-bearing mixed with friction pattern.
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