The hazards of landslides and rockslides to pipeline

As for the geological hazard of landslides and rockslides that may be faced in long-distance oil and gas pipeline projects, the paper analyzes the hazards of rockslides at different heights and in different quantities to shallow buried pipelines with different buffer layer thicknesses. Taking the rock slope at K0526+300 of Lanzhou-Chengdu-Chongqing Product Oil Pipeline as a study object, the model size is determined according to its cleavage fracture development degree and the characteristics of landslides and rockslides at this location in a 5.12 magnitude earthquake, and simulation calculations are performed for energy, speed, movement track, falling location and maximum impact force with RockFall software, and the hazards of rockslides to pipeline is predicated according to the strength theory. Results show that the slope rockslide quantity due to landslides may be 40×90×75~210×195×310 cm3, rockslides of volume greater than 0.7 m3 at middle and low part of side slopes has great hazards to the pipeline, and the increase of buffer layer thickness can reduce the impact of rockslides on the pipeline to certain extent.