Impact of different landslide volumes on underwater pipelines

doi:10.16265/j.cnki.issn1003-3033.2019.08.018

Abstract

Abstract: In order to evaluate the safety of underwater pipelines and ensure the reliability and integrity of the pipe system, physical model experiment method is adopted to study the characteristics of surge impact pressure on the pipeline walls under the action of landslide surge. Firstly, the development process of landslide surge was discussed. Then, the impact pressure of surge at different measuring points on the wall of underwater pipelines and the influence of different volume sliders on the impact pressure were analyzed. Finally, the relationship between the surge impact pressure of underwater pipelines and the volumes of sliders was obtained. The results indicate that with the increase of slider volume, the maximum surge impact pressure at the wall increases approximately linearly. The maximum surge impact pressure of the far-end measuring point is greater than that of the near-end measuring point under the same working conditions due to superposition and reflection of the surge. It is also found that the larger the slider volume is, the larger the maximum pressure and average pressure at the measuring point would be and the greater the pressure fluctuation becomes when water depth and landslide water inlet angle remain the same.

Key words: underwater pipeline, landslide, surge, physical model experiment, impact pressure

CLC Number:

X944.4

JI Hong, WANG Deqi, HUANG Weiqiu, YANG Ke, LIU Weikang, XU Manlin. Impact of different landslide volumes on underwater pipelines[J]. China Safety Science Journal, 2019, 29(8): 112-117.

References

[1] 白薇,程永舟,黄筱云. 滑坡涌浪对桩柱冲击压力分布特征及计算方法[J]. 中国安全科学学报,2017,27(2): 115-120.
BAI Wei, CHENG Yongzhou, HUANG Xiaoyun. Distribution characteristics and calculation methods of impact force brought by landslide surge on pile structure[J]. China Safety Science Journal, 2017, 27(2): 115-120.
[2] 纪虹,司鹄. 基于GIS技术的三峡库区滑坡涌浪灾害易损性可视化研究[J]. 中国安全科学学报,2013,23(9): 166-171.
JI Hong, SI Hu. Visualized analysis of surge vulnerability by landslides based on GIS in Three Gorges reserviors[J]. China Safety Science Journal, 2013, 23(9): 166-171.
[3] 西藏江达山体滑坡金沙江主河道被堵水位上涨迅猛[EB/OL].(2018-10-12).https://www.china.com.
[4] 王世昌,黄波林,刘广宁,等. 龚家方4号斜坡涌浪数值模拟分析[J]. 岩土力学,2015,36(1): 212-218.
WANG Shichang, HUANG Bolin, LIU Guangning, et al. Numerical simulation of tsunami due to slope failure at Gongjiafang on Three Gorges reservoir[J]. Rock and Soil Mechanics, 2015, 36(1): 212-218.
[5] 岳书波,刁明军,王磊. 滑坡涌浪的初始形态及其衰减规律的研究[J]. 水利学报,2016,47(6): 816-825.
YUE Shubo, DIAO Mingjun, WANG Lei. Researchon initial formation and attenuation of landslide-generated waves[J]. Journal of Hydraulic Engineering, 2016, 47(6): 816-825.
[6] 肖莉丽,殷坤龙,王佳佳,等. 基于物理模拟试验的库岸滑坡冲击涌浪[J]. 中南大学学报:自然科学版,2014,45(5): 1 618-1 626.
XIAO Lili, YIN Kunlong, WANG Jiajia, et al. Impulse wave generated by reservoir landslides based on physical modelexperiments[J]. Journal of Central South University: Science and Technology, 2014, 45(5):1 618-1 626.
[7] HUANG Bolin, YIN Yueping, WANG Shichang, et al. A physical similarity model of an impulsive wave generated by Gongjiafang landslide in Three Gorges reservoir, China[J]. Landslides, 2014, 11(3): 513-525.
[8] YIN Yueping, HUANG Bolin, WANG Wenpei, et al. Reservoir-induced landslides and risk control in Three Gorges project on Yangtze River, China[J]. Journal of Rock Mechanics and Geotechnical Engineering, 2016, 8(5): 577-595.
[9] YEYLAGHI S, MOA B, BUCKHAM B, et al. ISPH modelling of landslide generated waves for rigid and deformable slides in Newtonian and non-Newtonian reservoir fluids[J]. Advances in Water Resources, 2017, 107: 212-232.
[10] YAVARI-RAMSHE S, ATAIE-ASHTIANI B. A rigorous finite volume model to simulate subaerial and submarine landslide-generated waves[J]. Landslides, 2015, 14(1): 203-221.
[11] 黄波林,殷跃平,刘广宁,等. 三峡库区龚家方崩滑体涌浪物理原型试验与数值模拟对比研究[J]. 岩石力学与工程学报,2014,33(增1): 2 677-2 684.
HUANG Bolin, YIN Yueping, LIU Guangning, et al. Comparison study of physical prototype model test and numerical simulation of Gongjiafang landslide in Three Gorges reservoir[J]. Chinese Journal of Rock Mechanics and Engineering, 2014, 33(S1):2 677-2 684.
[12] 邓成进,袁秋霜,侯延华,等. 基于FLUENT的库区涌浪数值模拟[J]. 水利水运工程学报,2014(3): 84-91.
DENG Chengjin, YUAN Qiushuang, HOU Yanhua, et al. Numerical simulation of surge wave in reservoir area based on fluent[J]. Hydro-Science and Engineering, 2014(3): 84-91.
[13] CREMONESI M, FRANGI A, PEREGO U. A Lagrangian finite element approach for the simulation of water-waves induced by landslides[J]. Computers & Structures, 2011, 89(11/12): 1 086-1 093.
[14] TAN Hai, CHEN Shenghong. A hybrid DEM-SPH model for deformable landslide and its generated surge waves[J]. Advances in Water Resources, 2017, 108: 256-276.
[15] SHI Chuanqi, AN Yi, WU Qiang, et al. Numerical simulation of landslide-generated waves using a soil-water coupling smoothed particle hydrodynamics model[J]. Advances in Water Resources, 2016, 92: 130-141.