發(fā)布時間：2018-06-07 06:44

  本文選題：數(shù)量化理論 + 線狀邊坡穩(wěn)定性指標體系�。� 參考：《成都理工大學》2015年碩士論文

【摘要】：隨著國家“一帶一路”戰(zhàn)略的提出,新一輪基礎設施建設已經(jīng)開始。這一戰(zhàn)略的實施必然產(chǎn)生大量包括鐵路及公路在內(nèi)的線狀工程建設�？焖匍_挖形成大量工程邊坡穩(wěn)定性關系到工程進度、安全,在短時間內(nèi)進行快速的穩(wěn)定性評價不僅僅是工程建設要求,也是經(jīng)濟及效益的要求。本文以皖南山區(qū)湯屯及黃塔桃高速公路共77個邊坡進行的調(diào)查為依托,結(jié)合線狀工程建設初期的穩(wěn)定性評價要求,對邊坡穩(wěn)定性評價進行快速評價方法研究,取得了以下進展:(1)建立了邊坡穩(wěn)定性快速評價指標體系�？紤]邊坡幾何條件、結(jié)構(gòu)面特征、巖體特征、誘發(fā)因素等四個影響因素,提出了以結(jié)構(gòu)體形狀、巖體結(jié)構(gòu)類型、控制性軟弱面與邊坡組合、結(jié)構(gòu)面類型、巖性組合特征、巖體強度、邊坡高度、邊坡坡度、降雨為評價項目的評價指標,并進一步細化為適合數(shù)量化理論計算的類目,建立了基于數(shù)量化理論的快速評價指標體系。(2)基于數(shù)量化理論,提出了邊坡穩(wěn)定性快速評價指標量化方法。建立了指標量化矩陣;基于項目貢獻大小,進行指標篩選;利用樣本偏相關系數(shù)、方差比、范圍等進行項目的重要性排序;分析降雨影響邊坡穩(wěn)定性的機制,通過結(jié)構(gòu)面特性、巖體結(jié)構(gòu)類型對降雨下邊坡的響應,進行了18組試算,計算獲得了一組降雨條件下指標修正系數(shù)矩陣。(3)基于數(shù)量化理論,建立了邊坡穩(wěn)定性快速評價模型。利用數(shù)量化理論獲得樣本得分,利用比值定義法建立了邊坡穩(wěn)定性判別指標評價方法,并提出穩(wěn)定性判別指標K計算公式;將數(shù)量化理論Ⅲ的計算結(jié)果轉(zhuǎn)換的K值作為樣品得分,應用于數(shù)量化理論Ⅰ的模型中,建立基于數(shù)量化理論的多元線性模型;在此基礎上建立了適于野外工作的快速量化表格。(4)將所得快速評價模型應用于黃塔桃高速公路邊坡穩(wěn)定性評價,取得了較好的效果。在黃塔桃的高速公路邊坡的穩(wěn)定性評價應用中準確率為78.8%,誤判的結(jié)果雖然占11.2%,所有的誤判結(jié)果均比實際邊坡評價要保守。
[Abstract]:With the national "Belt and Road" strategy put forward, a new round of infrastructure construction has begun. The implementation of this strategy will inevitably produce a large number of linear projects, including railways and highways. Rapid excavation of a large number of engineering slope stability is related to the progress of the project, safety, in a short period of time for rapid stability evaluation is not only the requirements of engineering construction, but also the requirements of economy and efficiency. Based on the investigation of 77 slopes in Tangtun and Huangtadao Expressway in southern Anhui, combined with the requirements of stability evaluation in the initial stage of linear engineering construction, the rapid evaluation method of slope stability is studied in this paper. A rapid evaluation index system for slope stability is established. Considering the four influencing factors of slope geometry condition, structural plane feature, rock mass characteristic and induced factor, this paper puts forward the combination of structural body shape, rock mass structure type, controlling weak surface and slope, structural plane type, lithologic combination characteristic, etc. Rock mass strength, slope height, slope gradient and rainfall are the evaluation indexes of evaluation items, and further refined into categories suitable for quantitative theoretical calculation. A rapid evaluation index system based on quantitative theory is established. A quantitative method for quick evaluation of slope stability is presented. The index quantification matrix is established; based on the project contribution, the index selection is carried out; the importance ranking of the project is carried out by using sample partial correlation coefficient, variance ratio, range, etc.; the mechanism of rainfall affecting slope stability is analyzed, and the characteristics of structure plane are analyzed. The response of rock mass structure type to slope under rainfall is calculated in 18 groups, and a fast evaluation model of slope stability is established based on quantitative theory. The sample score is obtained by quantitative theory, the evaluation method of slope stability discriminant index is established by the ratio definition method, and the calculation formula of stability discriminant index K is put forward. The K value converted from the calculation result of quantization theory 鈪，

本文編號：1990250