河北省顺平县李思庄滑坡稳定性分析

王惠卿; 丰成君; 戚帮申; 王继明; 孙明乾; 杨肖肖; 万佳威; 范玉璐; 张鹏; 孟静; 谭成轩

doi:10.12090/j.issn.1006-6616.2020.26.04.052

河北省顺平县李思庄滑坡稳定性分析

doi: 10.12090/j.issn.1006-6616.2020.26.04.052

王惠卿^{1, 2,},
丰成君^{1, 2, ,},
戚帮申³,
王继明⁴,
孙明乾^{1, 2},
杨肖肖^{1, 2},
万佳威^{1, 2, 5},
范玉璐^{1, 2},
张鹏^{1, 2},
孟静^{1, 2},
谭成轩^{1, 2}

1.
中国地质科学院地质力学研究所, 北京 100081
2.
新构造运动与地质灾害重点实验室, 北京 100081
3.
北京市地质勘察技术院, 北京 100120
4.
中国联合工程有限公司, 浙江杭州 310051
5.
中国地质大学(北京), 北京 100083

基金项目:

中国地质调查局地质调查项目 DD20190317

详细信息

作者简介:
王惠卿(1992-), 女, 在读博士, 主要从事工程地质、地质灾害、构造应力场研究。E-mail:huiqing_wang@foxmail.com

通讯作者:
丰成君(1985-), 男, 副研究员, 硕士生导师, 主要从事构造应力场、地质灾害和区域地壳稳定性评价研究。E-mail:feng2010618@aliyun.com

中图分类号: TU42
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- 被引次数: 0
出版历程
- 收稿日期: 2020-06-15
- 修回日期: 2020-07-05
- 刊出日期: 2020-08-28

Analysis of the stability of the Lisizhuang landslide in Shunping County, Hebei Province

WANG Huiqing^{1, 2
,},
FENG Chengjun^{1, 2
, ,},
QI Bangshen³,
WANG Jiming⁴,
SUN Mingqian^{1, 2},
YANG Xiaoxiao^{1, 2},
WAN Jiawei^{1, 2, 5},
FAN Yulu^{1, 2},
ZHANG Peng^{1, 2},
MENG Jing^{1, 2},
TAN Chengxuan^{1, 2}

1.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
2.
Key Laboratory Neotectonic Movement & Geohazard, Ministry of Natural Resources, Beijing 100081, China
3.
Beijing Institute of Geo-exploration Technology, Beijing 100120, China
4.
China United Engineering Corporation Limited, Hangzhou 310051, Zhejiang, China
5.
China University of Geosciences(Beijing), Beijing 100083, China

摘要

摘要: 李思庄滑坡为河北省顺平县境内潜在危险性最大的一残坡积堆积层滑坡，近年由于削坡建房，滑坡稳定性降低，极端降雨条件下存在复活可能。在野外调查确定滑坡结构特征的基础上，采用改进Mein-Larson降雨入渗模型分析不同降雨强度及持时对李思庄滑坡安全系数影响，运用有限差分软件FLAC^3D计算分析该滑坡在天然和极端降雨工况下的稳定状态。研究结果表明：天然状态下，边坡潜在滑移面为基岩与残坡积层分界面，边坡安全系数为1.18，未发生失稳破坏；随降雨历时增加，潜在滑移面由基岩与残坡积层分界面转移到湿润峰面，当湿润峰达到基岩与残坡积层分界面，边坡安全系数为0.83，属不稳定状态。并对李思庄滑坡初步提出设置挡土墙和截排水沟的治理建议。
- 堆积层滑坡 /
- 稳定性 /
- Mein-Larson降雨入渗模型 /
- FLAC^3D
Abstract: The Lisizhuang landslide is the most potentially dangerous accumulation landslide in a residual slope accumulation layer. The toe of the landslide slope was cut to meet the need of construction land, reducing the stability of the landslide. Under the extreme rainfall conditions, the landslide may revive. Based on the field survey, the structural characteristics and main factors affecting the stability of the Lisizhuang landslide are determined. An improved Mein-Larson rainfall infiltration model was utilized to analyze the influence of different rainfall intensities and durations on the safety factor of the landslide. And the finite difference software FLAC^3D was used to simulate the stability of the landslide under natural conditions and extreme rainfall conditions. The results show that:In the natural state, the potential slip surface of the slope is the interface between the bedrock and the residual slope, and the safety factor is 1.18. The landslide stays stable. With the increase of the rainfall duration, the potential slip surface is transferred from the interface between the bedrock and the residual slope to the wetting front. When the wetting front reaches the boundary between the bedrock and the residual slope, the numerical simulation shows that the safety factor of the landslide is 0.83, and the landslide is unstable. Retaining wall and drainage ditch for slope treatments of the Lisizhuang landslide are put forward in this paper.
- accumulation landslide /
- stability /
- Mein-Larsonrn rainfall infiltration model /
- FLAC^3D
注释:

责任编辑：范二平

HTML全文

图 1 河北省顺平县李思庄滑坡

Figure 1. Field photos of the Lisizhuang landslide in Shunping County, Hebei Province

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图 2 李思庄滑坡平面图

Figure 2. Plan view of the Lisizhuang landslide

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图 3 李思庄滑坡剖面图

Figure 3. Profile of the Lisizhuang landslide

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图 4 1990—2019年顺平县的最大日降雨量

Figure 4. Maximum daily rainfall in Shunping county from 1990 to 2019

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图 5 滑体浸润深度随降雨历时变化规律

Figure 5. Curves of infiltration depth with rainfall duration of the Lisizhuang landslide

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图 6 滑体入渗安全系数随降雨历时变化规律

Figure 6. Curves of safety factor with rainfall duration of the Lisizhuang landslide

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图 7 数值计算模型

Figure 7. Numerical calculation model

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图 8 天然工况下和位移云图

Figure 8. Displacement nephogram sum under natural conditions

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图 9 天然工况下剪应变增量云图

Figure 9. Shear strain rate nephogram under natural conditions

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图 10 天然工况下塑性区分布

Figure 10. Plastic zone under natural conditions

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图 11 极端降雨工况下和位移云图

Figure 11. Displacement sum nephogram under extreme rainfall conditions

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图 12 极端降雨工况下剪应变增量云图

Figure 12. Shear strain rate nephogram under extreme rainfall conditions

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图 13 极端降雨工况下塑性区分布

Figure 13. Plastic zone under extreme rainfall conditions

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表 1 改进Mein-Larson降雨入渗模型岩土体物理力学参数

Table 1. Physical and mechanical parameters of the Lisizhuang landslide based on the improved Mein-Larson rainfall infiltration model

残余含水率 θ_r/%	饱和含水率 θ_s/%	曲线拟合参数 α/m^-1	曲线拟合参数 n	饱和渗透系数 k_s/（m·s^-1）	土的重度 γ_t/（kN·m^-3）	有效内摩擦角 φ′/（°）	有效黏聚力 c′/kPa	材料属性 φ^b/（°）
1.5	25	3.5	1.5	5.78×10^-6	22.2	19	3.5	25

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表 2 F_s=1时各降雨强度失稳所需历时

Table 2. Duration required for instability at each rainfall intensity when F_s=1

降雨强度/（mm/d）	300	250	200	150	100	50
降雨历时/h	18	20	24	30	40	62
潜在滑移面深度/m	2.3	1.9	1.9	1.8	1.7	1.6

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表 3 数值模拟岩土体物理力学参数

Table 3. Numerical simulation values of physical and mechanical parameters of the rock and soil mass

岩性	密度/（g·cm^-3）	弹性模量/MPa	泊松比μ	粘聚力/kPa	内摩擦角/（°）
基岩	2.95	37700	0.37	35000	47
滑体（天然状态）	1.87	8.5	0.35	5.5	27
滑体（极端降雨状态）	2.22	6.6	0.37	3.5	19
冲洪积物	1.82	9.0	0.30	65	31

下载: 导出CSV

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河北省顺平县李思庄滑坡稳定性分析

doi: 10.12090/j.issn.1006-6616.2020.26.04.052

作者简介:
王惠卿(1992-), 女, 在读博士, 主要从事工程地质、地质灾害、构造应力场研究。E-mail:huiqing_wang@foxmail.com

通讯作者:
丰成君(1985-), 男, 副研究员, 硕士生导师, 主要从事构造应力场、地质灾害和区域地壳稳定性评价研究。E-mail:feng2010618@aliyun.com

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Analysis of the stability of the Lisizhuang landslide in Shunping County, Hebei Province

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留言板

河北省顺平县李思庄滑坡稳定性分析

doi: 10.12090/j.issn.1006-6616.2020.26.04.052

作者简介: 王惠卿(1992-), 女, 在读博士, 主要从事工程地质、地质灾害、构造应力场研究。E-mail:huiqing_wang@foxmail.com

通讯作者: 丰成君(1985-), 男, 副研究员, 硕士生导师, 主要从事构造应力场、地质灾害和区域地壳稳定性评价研究。E-mail:feng2010618@aliyun.com

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Analysis of the stability of the Lisizhuang landslide in Shunping County, Hebei Province

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出版历程

目录

作者简介:
王惠卿(1992-), 女, 在读博士, 主要从事工程地质、地质灾害、构造应力场研究。E-mail:huiqing_wang@foxmail.com

通讯作者:
丰成君(1985-), 男, 副研究员, 硕士生导师, 主要从事构造应力场、地质灾害和区域地壳稳定性评价研究。E-mail:feng2010618@aliyun.com