本文選題：滑坡穩(wěn)定性　切入點：影響因子　出處：《吉林大學》2017年碩士論文

【摘要】：本論文所涉及的喇叭溝滑坡,位于四川省西南部的會理縣江普鄉(xiāng)智力村,涼山彝族自治州正南端,處于攀西資源開發(fā)區(qū)腹心,西連攀枝花,南與云南省昆明市和楚雄州相鄰,介于東經(jīng)102°14'17.02"~102°14'39.88",北緯26°13'51.83"~26°14'11.48"之間,屬四川省涼山州所轄,滑坡總面積約為15.8×104m2。本論文以四川省喇叭溝滑坡為背景,從地形地貌、地層巖性、地質(zhì)構造與地震、氣象水文地質(zhì)條件及人類工程活動這五方面著手,結合野外地質(zhì)調(diào)查與工程勘察,對該滑坡的工程地質(zhì)條件進行了細致的研究,結合滑坡的機理及專家打分,篩選出相對較為重要的影響因子,再運用MATLAB軟件計算出各個影響因子的權重值,結合數(shù)學知識,得出各個影響因子的綜合權重值,其中修建灌渠房屋所占的綜合權重為0.1304,降雨為0.2667,地震為0.1911,從而擬定了天然工況、持續(xù)降雨工況、地震工況這三種工況。運用理正和FLAC軟件研究滑坡穩(wěn)定性時,根據(jù)擬定的天然工況、持續(xù)降雨工況以及地震工況這三種工況,分別計算分析滑坡在這三種不同工況下的穩(wěn)定性系數(shù)。分析滑坡的整體穩(wěn)定性時,由于滑坡的滑面呈折線形,因此采用的方法是傳遞系數(shù)法,滑坡的整體是趨于穩(wěn)定的,僅有三處斜坡處于欠穩(wěn)定或不穩(wěn)定的狀態(tài),坡體變形至今雨季還在持續(xù),未來雨季有繼續(xù)發(fā)展的趨勢,可能導致滑坡失穩(wěn)。在計算的過程中,選擇合理的物理力學參數(shù),進行FLAC數(shù)值模擬,并與理正分析得出的結果進行對比,以確保計算分析的可靠性。Ⅰ號斜坡在天然工況下的穩(wěn)定性系數(shù)為1.046,處于欠穩(wěn)定狀態(tài);持續(xù)降雨工況下的穩(wěn)定性系數(shù)為0.999,處于不穩(wěn)定狀態(tài);地震工況下的穩(wěn)定性系數(shù)為1.024,處于欠穩(wěn)定狀態(tài);Ⅱ號斜坡在天然、持續(xù)降雨、地震這三種工況下的穩(wěn)定系數(shù)和穩(wěn)定性分別為1.051(基本穩(wěn)定)、1.003(欠穩(wěn)定)、1.026(欠穩(wěn)定);Ⅲ號斜坡在天然、持續(xù)降雨、地震這三種工況下的穩(wěn)定系數(shù)和穩(wěn)定性分別為1.055(基本穩(wěn)定)、1.005(欠穩(wěn)定)、1.029(欠穩(wěn)定);與FLAC數(shù)值模擬的結果很接近,理正運用的是瑞典條分法求解安全系數(shù),該方法基于應力一應變分析的近似解,而FLAC運用的是強度折減法,該方法是基于條塊間的力的假設的解析解,兩者相吻合。在數(shù)值模擬的輔助下,可以很直觀地看到斜坡的潛在滑移面。根據(jù)滑坡穩(wěn)定性分析的結果及地形等條件研究滑坡治理,有針對性地進行治理,選擇仰斜式重力擋土墻作為支護結構,并驗算治理之后的穩(wěn)定性。在滑坡的前緣設置擋土墻,以達到防治滑坡進一步發(fā)展的目的。經(jīng)驗算,所設計的擋土墻滿足抗滑移及抗傾覆穩(wěn)定性要求。修建灌渠占的權重值比較大,建議要用擋土墻進行滑坡防治的同時,還應配合合理修建房屋及灌渠進行綜合治理。
[Abstract]:The Xiagou landslide in this paper is located at the southern end of Liangshan Yi Autonomous Prefecture, Jiangpu Township, Huili County, southwest Sichuan Province, and is located in the heart of Panxi Resource Development Zone, with Panzhihua in the west, adjacent to Kunming and Chuxiong in the south of Yunnan Province. Between longitude 102 擄14 and 17.02 "102 擄14" 39.88 "N 26 擄1313 51.83" 26 擄1411.48 ", belonging to Liangshan Prefecture, Sichuan Province, the total area of landslide is about 15.8 脳 10 ~ 4 m ~ 2. The background of this paper is Xiagou landslide in Sichuan Province, which is based on landform and geomorphology, stratigraphic lithology, geological structure and earthquake. From the five aspects of meteorological, hydrogeological conditions and human engineering activities, combined with field geological investigation and engineering investigation, the engineering geological conditions of the landslide are studied in detail, and the landslide mechanism and experts are graded. Select the relatively important influence factors, then use MATLAB software to calculate the weight value of each influence factor, combined with mathematical knowledge, get the comprehensive weight value of each influence factor. The comprehensive weight of building irrigation canal is 0.1304, the rainfall is 0.2667, and the earthquake is 0.1911. As a result, the three conditions of natural condition, continuous rainfall condition and earthquake condition are drawn up. When using the software of Lizheng and FLAC to study the stability of landslide, According to the three working conditions of natural condition, continuous rainfall condition and earthquake condition, the stability coefficient of landslide under these three different conditions is calculated and analyzed separately. When the overall stability of landslide is analyzed, the slide surface of the landslide is folded linearly. Therefore, the method adopted is transfer coefficient method. The whole landslide tends to be stable. Only three slopes are in an unstable or unstable state. The deformation of slope body is still in the rainy season, and the future rainy season will continue to develop. In the course of calculation, choose reasonable physical and mechanical parameters, carry out FLAC numerical simulation, and compare with the results obtained by positive analysis. In order to ensure the reliability of calculation and analysis, the stability coefficient of No. 1 slope is 1.046 under natural conditions and 0.999 under the condition of continuous rainfall. The stability coefficient and stability of slope 鈪，

本文編號：1665800