周迎 易武 余慶



摘要:魯灘壩滑坡位于竹溪縣新州鎮魯灘壩村。自2016年以來,魯灘壩滑坡一直處于持續變形階段,直接導致其下方部分居民房屋被破壞。本文在掌握滑坡區地質資料的基礎上,結合現場調查訪問,對魯灘壩村滑坡的地質與變形特征進行了詳細的描述;并通過BP神經網絡對滑坡進行敏感性分析得出結論,在降雨工況下該類滑坡可能發生局部圓弧形滑移破壞,發生整體或大規模滑移變形破壞的可能性較小。本研究對類似工程穩定性分析具有借鑒與指導意義。
Abstract: Lutanba landslide is located in Lutanba village, XinZhou town, ZhuXi county. Since 2016, the Lutanba landslide has been in a continuous deformation stage, directly causing the destruction of some residents' houses below it. Based on the geological data of the landslide area and the field investigation, the geological and deformation characteristics of Lutanba landslide are described in detail. Through the sensitivity analysis of the landslide by BP neural network, the conclusion is drawn that under the working condition of rainfall, this kind of landslide may occur partial circular arc slip failure, and it is less likely to occur overall or large-scale slip deformation failure. This study has reference and guiding significance for the stability analysis of similar projects.
關鍵詞:魯灘壩滑坡;變形特征;BP神經網絡;穩定性分析
Key words: Lutanba landslide;deformation features;BP neural network;stability analysis
中圖分類號:P642.22? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 文獻標識碼:A? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 文章編號:1006-4311(2019)28-0273-05
0? 引言
魯灘壩滑坡位于竹溪縣新州鎮魯灘壩村,匯灣河的右岸。自2016年以來,魯灘壩村滑坡一直處于持續變形階段,直接導致其下方部分居民房屋被破壞。本文以魯灘壩村滑坡為例,基于BP神經網絡對滑坡進行敏感性分析,建立滑坡變形和影響因素之間的映射,從而計算出各變形因素的敏感度系數,最終識別造成該滑坡變形的關鍵因素。
本文通過收集到的勘查資料和野外調查訪問,研究了滑坡的地質特征和變形特征,在此基礎上,對滑坡的影響因素及滑坡的穩定性[1]進行了探討。
1? 滑坡區地質環境條件
1.1 地形地貌
新洲鄉屬構造剝蝕中低山嶺重丘區,其海拔在276~1150m之間,地勢高低起伏較大,溝壑縱橫,地形破碎、坡陡。
滑坡所在區總體地勢為南高北低,地形坡度20°~25°,匯灣河為區內最低侵蝕基準面。……