基于多源数据分析的三峡库区抗滑工程优化与比选

针对三峡库区抗滑工程选型、多排抗滑桩位置选取与抗滑工程参数设计问题，通过分析整理三峡库区重庆段已成功治理的257组地质灾害数据，运用分类统计参数方法，分析最优支护结构形式；基于FLAC^3D软件，建立力学分析数值模型，选取多排抗滑桩合理位置；将理正软件设计参数与收集资料进行对比，确定最优桩间距与锚固深度取值，并应用于工程实例验证。研究结果表明：当滑坡剩余推力小于100 kN/m且工程设置位置处滑体厚度小于5 m时，宜采用重力式挡墙；大于100 kN/m或滑体厚度较大时建议采取抗滑桩。当设置两级抗滑桩支护滑坡时，前排桩位于反翘端点，排距占反翘端点与滑坡后缘距离为20%时，滑坡的总推力最小，为最优方案。三峡库区重庆段滑坡抗滑桩锚固深度与桩长比值推荐值为0.45,桩间距推荐值为5.5 m或6.0 m。将研究结果应用于三峡库区重庆段滑坡工程实例，对比分析得出此优化设计方法具有可行性和实用性，可为后续滑坡治理提供参考。

Optimization and comparison of anti-sliding projects in the Three Gorges Reservoir area based on multi-source data analysis

In order to handle the problem of the anti-sliding engineering selection, the position of multi-row anti-sliding piles and the design of anti-sliding engineering parameters in the Three Gorges Reservoir area, 257 groups of geological disaster data in Chongqing Section of the Three Gorges Reservoir area have been successfully managed through analysis, classified statistical parameter method was used to analyze the optimal supporting structure form. A numerical simulation FlAC3D was used to build mechanical analysis model, and to select reasonable positions of multiple rows of anti-slide piles, the paper compared the design parameters of the Lizheng software with the collected data, to determine the optimal pile spacing and anchoring depth values, then the results were applied to the project verification. The research shows that when the residual thrust of the landslide is less than 100 kN/m and the thickness of the sliding body at the project installation location is less than 5 m, a gravity retaining wall should be adopted, when it is greater than 100 kN/m or the thickness of the sliding body is large, it is recommended to adopt anti-slide piles. When double-row piles support a landslide, the front row of piles is located at the end of the inverted warp, and when the row spacing accounts for 20% of the distance between the end of the inverse warped and the trailing edge of the landslide, the total thrust of the landslide is the smallest, which is the optimal solution. The recommended value of the ratio of anchorage depth to pile length of landslide anti-slide piles in Chongqing section of the Three Gorges Reservoir area is 0.45, and the recommended value of pile spacing is 5.5 m or 6.0 m.The results are applied to a landslide project in the Three Gorges Reservoir area, comparative analysis shows that this optimized design method is feasible and practical.