- 摘 要
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(1 湖州職業(yè)技術學院建筑工程學院, 湖州 313000; 2 湖州市綠色建筑技術重點實驗室, 湖州 313000;3 浙江力豐建筑加固有限公司, 湖州 313000; 4 東南大學土木工程學院, 南京 211189)
摘要: 南京古城墻文物價值非凡,滑坡是古城墻的典型損傷,對包山式城墻危害巨大. 以獅子山段城墻歷史滑坡勘察資料為背景,對磚砌體與土體的復合結構進行分析并適當簡化. 采用 GEO?SLOPE 軟件中的瑞典法、簡化Bishop 法、Janbu 法、Spencer 四種極限平衡分析方法,對考慮自然情況、不同浸潤深度、施加錨桿三種工況下的土坡穩(wěn)定性進行分析. 結果表明:各種方法對浸潤深度的敏感程度很接近,評價土坡穩(wěn)定性時以簡化 Bishop 法得出的結果最安全;對于常見浸潤深度 2~ 4m,四種方法所得邊坡安全系數(shù)為 1. 5 ~ 1. 6;增加錨固長度比增加錨桿預加力對提高邊坡安全系數(shù)效果更為明顯.
關鍵詞: 包山式城墻; 穩(wěn)定性分析; 滑坡; 極限平衡法; 浸潤深度
中圖分類號:TU471 文獻標志碼:A 文章編號:1002?848X(2022)16?0132?05
DOI:10. 19701 / j. jzjg. LS210020
Stability analysis of the soil slope of ancient city wall surrounded by mountains
HU Jian1,2, WANG Fang1,2, ZHU Lei3, MU Baogang4
(1 School of Architecture and Engineering, Huzhou Vocational and Technical College, Huzhou 313000, China; 2 HuzhouKey Laboratory of Green Building Technology, Huzhou 313000, China; 3 Zhejiang Lifeng Building Reinforcement Co., Ltd.,Huzhou 313000, China; 4 School of Civil Engineering, Southeast University, Nanjing 211189, China)
Abstract: The cultural relics of the ancient city wall in Nanjing are of great value, and landslides are typical damages tothe ancient city walls and cause great harm to the city wall surrounded by mountains. Based on the historical landslidesurvey data of the Shizishan section of the city wall, the composite structure of brick masonry and soil was analyzed andappropriately simplified. Using four limit equilibrium analysis methods in GEO?SLOPE software, namely Swedish method,simplified Bishop method, Janbu method and Spencer method, the soil slope stability under three conditions of consideringnatural conditions, different infiltration depths and applying anchors was analyzed. The results show that the sensitivity ofvarious methods to the infiltration depth is very close, and the result obtained by the simplified Bishop method is the safestto evaluate the stability of soil slopes. For the common infiltration depth of 2~ 4m, the safety factor of the slope obtained bythe four methods is 1. 5~ 1. 6. Increasing the anchorage length is more effective in improving the safety factor of the slopethan increasing the prestressing force of the anchor bolt.
Keywords:city wall surrounded by mountain; stability analysis; landslide; limit equilibrium method; infiltration depth
∗湖州市科技計劃項目(2020YZ07),浙江省基礎公益研究計劃項目(LGF22D020002),浙江省 2020 年度高校訪問工程師校企合作項目(FG2020167).
第一作者:胡健,碩士,講師,主要從事邊坡工程、軟基處理等方向的研究,Email:493268163@ qq. com.
[引用本文] 胡健,王芳,朱磊,等. 包山式古城墻土坡穩(wěn)定性分析 [ J]. 建筑結構,2022,52(16):132?136. HUJian,WANG Fang,ZHU Lei,et al. Stability analysis of the soil slope of ancient city wall surrounded by mountains[ J].Building Structure,2022,52(16):132?136.
