| 前期降雨作用下边坡滑坡模型试验 |
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| 引用本文： | 李卓,何勇军,李宏恩,徐海峰. 前期降雨作用下边坡滑坡模型试验[J]. 河海大学学报(自然科学版), 2016, 44(5): 400-405 |
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| 作者姓名： | 李卓 何勇军 李宏恩 徐海峰 |
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| 作者单位： | 南京水利科学研究院大坝安全与管理研究所, 江苏 南京 210029; 水利部大坝安全管理中心, 江苏 南京 210029,南京水利科学研究院大坝安全与管理研究所, 江苏 南京 210029; 水利部大坝安全管理中心, 江苏 南京 210029,南京水利科学研究院大坝安全与管理研究所, 江苏 南京 210029; 水利部大坝安全管理中心, 江苏 南京 210029,南京水利科学研究院大坝安全与管理研究所, 江苏 南京 210029; 水利部大坝安全管理中心, 江苏 南京 210029 |
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| 基金项目： | 南京水利科学研究院基金(Y714001,Y716009)；国家科技支撑计划(2012BAK10B04)；国家自然科学基金(51309164,51579154)；水利部公益性行业科研专项(201301033)；江苏省自然科学基金(BK20130072)；水利部“984”项目(201501) |
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| 摘 要： | 为研究前期降雨对边坡稳定性的影响,基于云南省龙江水电站近坝库岸边坡滑坡区实测降雨资料,通过自行研制模型试验装置,进行前期降雨作用下室内边坡滑坡模型试验,分析前期降雨作用下的边坡滑坡特性。研究表明:前期降雨作用是引起边坡滑坡的主要因素,由于前期降雨作用下雨水在边坡坡面进行了充分入渗,导致边坡土体强度减小,引起非饱和土中基质吸力丧失或减小,再次降雨极易引起边坡滑坡;前期降雨作用引起边坡滑坡类型为浅层牵引式滑坡。
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| 关 键 词： | 前期降雨；边坡滑坡；模型试验；土压力；基质吸力；孔隙水压力；龙江水电站 |
| 收稿时间： | 2015-09-29 |
Model test on slope landslides under antecedent rainfall |
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| LI Zhuo,HE Yongjun,LI Hongen and XU Haifeng. Model test on slope landslides under antecedent rainfall[J]. Journal of Hohai University (Natural Sciences ), 2016, 44(5): 400-405 |
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| Authors: | LI Zhuo HE Yongjun LI Hongen XU Haifeng |
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| Affiliation: | Dam Safety Management Department, Nanjing Hydraulic Research Institute, Nanjing 210029, China; Dam Safety Management Center of the Ministry of Water Resources, Nanjing 210029, China,Dam Safety Management Department, Nanjing Hydraulic Research Institute, Nanjing 210029, China; Dam Safety Management Center of the Ministry of Water Resources, Nanjing 210029, China,Dam Safety Management Department, Nanjing Hydraulic Research Institute, Nanjing 210029, China; Dam Safety Management Center of the Ministry of Water Resources, Nanjing 210029, China and Dam Safety Management Department, Nanjing Hydraulic Research Institute, Nanjing 210029, China; Dam Safety Management Center of the Ministry of Water Resources, Nanjing 210029, China |
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| Abstract: | Based on the rainfall profile in the landslide-prone area on the reservoir bank slope near the dam of the Longjiang Hydropower Plant in Yunnan Province, the slope stability under antecedent rainfall was investigated. By using the self-developed experimental apparatus, laboratory model tests were conducted to simulate landslides under antecedent rainfall, and the characteristics of landslides were analyzed. Research shows that antecedent rainfall is a major factor in landslides. Antecedent rainfall infiltrates the slope from the surface, reducing the soil strength and leading to a loss or reduction of the matrix suction in the unsaturated soil. Thus, the subsequent rainfall can easily generate landslides. Landslides induced by antecedent rainfall are categorized as shallow retrogressive landslides. |
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| Keywords: | antecedent rainfall slope landslide model test earth pressure matrix suction pore water pressure Longjiang Hydropower Plant |
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