结合TRIGRS模型的黄土滑坡危险性评价粒子滤波数据同化方法
魏冠军(1976—),男,甘肃庄浪人,博士,教授,主要从事误差理论与测量数据处理研究。E-mail: wchampion@mail.lzjtu.cn |
收稿日期: 2023-05-18
修回日期: 2023-07-03
网络出版日期: 2023-09-22
基金资助
国家自然科学基金项目(41964008)
Particle Filter Data Assimilation Method for Loess Landslide Risk Assessment Combined with TRIGRS Model
Received date: 2023-05-18
Revised date: 2023-07-03
Online published: 2023-09-22
Supported by
National Natural Science Foundation of China(41964008)
滑坡灾害对国家基础设施工程产生了严重的威胁,开展工程区域滑坡灾害危险性评价对于铁路运行安全至关重要。滑坡危险性评价通常可以概括为频率分析法、概率分析法以及确定性分析法,其中基于降雨入渗-积水机制角度建立物理确定性模型可以获得更为客观的评价结果,具有良好的适用性,但其通常需要大量的岩土参数参与计算,易受岩土参数的时空变异性以及不确定性等因素影响,存在一定的局限性。为进一步提升滑坡危险性评价的预测精度,本文以高家湾滑坡为研究区,基于粒子滤波算法,利用SBAS-InSAR观测数据对TRIGRS模型中的安全系数(Fs)进行同化,同时更新模型的内摩擦角参数。结果表明:同化后高家湾滑坡的安全系数呈现出逐渐降低的趋势,且坡体前缘的安全系数明显低于坡体后缘,与当前观测更为接近;实现了内摩擦角参数的实时更新,使参数逐渐向观测值方向修正;模型的均方根偏差从0.17降低至0.04,使模型预测结果与实际观测更为接近。因此,基于粒子滤波同化方法的滑坡危险性评价可以更准确地体现当前滑坡的实际情况,具有更高的预测精度。
魏冠军 , 高茂宁 . 结合TRIGRS模型的黄土滑坡危险性评价粒子滤波数据同化方法[J]. 地球信息科学学报, 2023 , 25(10) : 2084 -2092 . DOI: 10.12082/dqxxkx.2023.230274
Landslide disasters pose a grave threat to national infrastructure projects, making landslide disaster risk assessment in engineering areas crucial for ensuring the safety of railway operations. Typically, such assessments involve employing frequency analysis, probability analysis, and deterministic analysis methods. Among these methods, the establishment of a physical deterministic model based on the mechanisms of rainfall infiltration and water accumulation yields more objective evaluation results and exhibits excellent applicability. However, physically deterministic models often necessitate the inclusion of numerous geotechnical parameters in their calculations, leading to certain limitations. Factors like temporal and spatial variability, as well as the uncertainty in geotechnical parameters, influence these models. To enhance the prediction accuracy of landslide risk assessments, this study focuses on the Gaojiawan landslide as the research area. By utilizing the particle filter algorithm, the study assimilates safety factor (Fs) data from the TRIGRS model, incorporating SBAS-InSAR observation data. Additionally, it updates the internal friction angle parameter of the model. The results reveal a gradual decrease in the safety factor of the Gaojiawan landslide following assimilation. Moreover, the safety factor at the front edge of the slope is significantly lower than that at the rear edge, aligning more closely with current observations. Real-time updates of the internal friction angle parameters are achieved, gradually aligning the parameters with the observed values. As a result, the root mean square deviation of the model decreases from 0.17 to 0.04, bringing the model's prediction closer to the observed values. Consequently, landslide risk assessment based on the particle filter assimilation method more accurately reflects the current landslide situation and exhibits higher prediction accuracy.
表1 模型土体参数选取Tab. 1 Selection of model soil parameters |
输入参数 | 选取参数值 |
---|---|
内聚力/kPa | 22.3 |
内摩擦角/° | 25.8 |
土壤容重/(kN/m3) | 18.9×103 |
饱和导水率/(m/s) | 15×10-7 |
扩散率/(m/s) | 15×10-5 |
饱和土壤含水率/% | 0.12 |
残余土壤含水率/% | 0.109 |
[1] |
许领, 戴福初, 邝国麟, 等. 黄土滑坡典型工程地质问题分析[J]. 岩土工程学报, 2009, 31(2):287-293.
[
|
[2] |
冉林, 马鹏辉, 彭建兵, 等. 甘肃黑方台“10·5”黄土滑坡启动及运动特征分析[J]. 中国地质灾害与防治学报, 2022, 33(6):1-9.
[
|
[3] |
周侯伯, 肖桂荣, 林炫歆, 等. 基于特征筛选与差分进化算法优化的滑坡危险性评估方法[J]. 地球信息科学学报, 2022, 24(12):2373-2388.
[
|
[4] |
|
[5] |
|
[6] |
|
[7] |
|
[8] |
同霄, 彭建兵, 朱兴华, 等. 降雨作用下黄土浅层滑坡的危险性分析[J]. 水土保持通报, 2016, 36(3):109-113.
[
|
[9] |
高波, 王晓勇. 基于SINMAP模型的延安市滑坡危险性区划[J]. 水土保持通报, 2019, 39(3):211-216.
[
|
[10] |
徐增辉, 金继明, 蔡耀辉, 等. 气候变化对黄土高原浅层滑坡影响的模拟研究——以延安宝塔区为例[J]. 水土保持研究, 2021, 28(1):387-393.
[
|
[11] |
|
[12] |
|
[13] |
|
[14] |
|
[15] |
张波, 唐萌萌, 刘润泽. 动态数据驱动多模型耦合的滑坡稳定性分析方法[J]. 测绘与空间地理信息, 2017, 40(6):142-144,147.
[
|
[16] |
马建文, 秦思娴. 数据同化算法研究现状综述[J]. 地球科学进展, 2012, 27(7):747-757.
[
|
[17] |
李新, 刘丰, 方苗. 模型与观测的和弦:地球系统科学中的数据同化[J]. 中国科学:地球科学, 2020, 50(9):1185-1194.
[
|
[18] |
|
[19] |
张智韬, 陈策, 贾江栋, 等. 基于EnKF和PF的沙壕渠灌域土壤含盐量监测模型研究[J]. 农业机械学报:, 2023, 54(6):361-372.
[
|
[20] |
金哲, 汪涛, 张洪芹, 等. 基于中国大气反演系统的卫星CO2数据同化对全球碳收支的评估[J]. 中国科学:地球科学, 2023, 53(3):587-597.
[
|
[21] |
|
[22] |
|
[23] |
|
[24] |
|
[25] |
朱建军, 胡俊, 李志伟, 等. InSAR滑坡监测研究进展[J]. 测绘学报, 2022, 51(10):2001-2019.
[
|
[26] |
何涯舟, 张珂, 晁丽君, 等. 基于多源遥感土壤湿度与模型数据同化的流域径流模拟[J]. 水资源保护, 2023, 39(2):145-151,189.
[
|
[27] |
包姗宁, 曹春香, 黄健熙, 等. 同化叶面积指数和蒸散发双变量的冬小麦产量估测方法[J]. 地球信息科学学报, 2015, 17(7):871-882.
|
[28] |
刘良云, 陈良富, 刘毅, 等. 全球碳盘点卫星遥感监测方法、进展与挑战[J]. 遥感学报, 2022, 26(2):243-267.
[
|
[29] |
|
[30] |
王占巍, 赵发睿, 谢文苹, 等. 青海省高家湾滑坡的形成条件分析及稳定性评价[J]. 水土保持通报, 2020, 40(3):81-87.
[
|
[31] |
|
[32] |
|
/
〈 | 〉 |