本文關(guān)鍵詞：楔形塊體滑落試驗(yàn)及邊坡楔形體的安全性評價　出處：《東北大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 楔形塊體 滑落模型試驗(yàn) 灰色系統(tǒng)理論 空間角度安全系數(shù) GeoSMA-3D

【摘要】：楔形體的破壞是實(shí)際邊坡工程中最常見的破壞方式之一,前人專注于對巖體的力學(xué)參數(shù)以及結(jié)構(gòu)面的強(qiáng)度對潛在楔形塊體破壞的研究,這種破壞是一種巖體之間應(yīng)力的破壞,是產(chǎn)生楔形體的原因之一。結(jié)構(gòu)面控制型的滑落失穩(wěn)更強(qiáng)調(diào)結(jié)構(gòu)面的空間位置及相互組成在對巖體的切割過程中所產(chǎn)生的塊體的影響,本文著重研究兩組優(yōu)勢結(jié)構(gòu)面與臨空面共同作用下產(chǎn)生的楔形塊體空間位置之間的關(guān)系,簡化內(nèi)部含有巖橋以及結(jié)構(gòu)面非連續(xù)貫通的情況,在假設(shè)塊體已被切割的狀態(tài)下,從幾何的角度進(jìn)行試驗(yàn)與分析,在對數(shù)據(jù)的處理分析后總結(jié)規(guī)律,提出基于幾何關(guān)系與空間角度關(guān)系的安全性評價方法。此外,由于從幾何與空間角度方面來研究楔形塊體的滑落可能的文獻(xiàn)較少,本文提出并研制了試驗(yàn)平臺用已進(jìn)行楔形塊體空間幾何方位方面的研究,利用團(tuán)隊(duì)研制的GeoSMA-3D系統(tǒng),定義了坐標(biāo)系中楔形塊體的空間位置參數(shù),進(jìn)行對關(guān)鍵塊體的判斷,與提出的安全系數(shù)計(jì)算方法得出的結(jié)果比對。本文主要開展如下工作和研究內(nèi)容：首先,總結(jié)了巖質(zhì)邊坡的穩(wěn)定性分析方法,以及不同的節(jié)理巖體的質(zhì)量評分體系；通過分析比較,關(guān)于平面破壞和傾倒破壞的空間角度修正參數(shù)較為全面,但在楔形塊體評分體系中對空間角度的研究較少,通過相關(guān)文獻(xiàn)的閱讀,確定了SMR法中的權(quán)重最大的塊體空間位置因素,提出了楔形塊體空間角度的模型；其次,為建立楔形塊體空間角度的模型,提出了變角度空間塊體滑落模型試驗(yàn)平臺的概念并建立了實(shí)物模型,制作加工了以花崗巖和砂漿材料為代表的楔形試塊,開展了楔形試塊的滑落試驗(yàn)取得了試塊臨界滑落狀態(tài)下的兩次角度。再次,應(yīng)用灰色理論中的GM(1,1)模型優(yōu)化了室內(nèi)試驗(yàn)的數(shù)據(jù)并對其進(jìn)行處理與規(guī)律性的總結(jié),得出花崗巖楔形塊體與砂漿楔形塊體的對比曲線和方程,擬合出楔形塊體旋轉(zhuǎn)角、斷面角與傾斜角之間的關(guān)系,提出一種基于空間角度的楔形體安全評價方法；最后,將上述內(nèi)容應(yīng)用GeoSMA-3D軟件,定義了坐標(biāo)系中楔形塊體的旋轉(zhuǎn)角、斷面角,建立巖質(zhì)邊坡的空間模型,模擬添加三維結(jié)構(gòu)面網(wǎng)絡(luò),通過對邊坡臨空面傾角的改變,應(yīng)用空間角度的安全評價方法計(jì)算程序中得到的楔形塊體安全系數(shù),并與分析得出的關(guān)鍵塊體作比對。
[Abstract]:Wedge failure is one of the most common failure modes in practical slope engineering. Previous studies focused on the mechanical parameters of rock mass and the strength of structural plane on the potential wedge block failure. This kind of failure is the failure of stress between rock masses. It is one of the reasons that the wedge-shaped body is produced. The sliding instability of the structural plane control type emphasizes the influence of the spatial position and the mutual composition of the structural plane on the block in the cutting process of the rock mass. This paper focuses on the study of the relationship between the spatial position of wedge-shaped blocks produced by the interaction of two groups of dominant structural planes and the adjacent surfaces, and simplifies the case of the internal rock bridges and discontinuous transfixion of the structural planes. Under the assumption that the block has been cut, the experiment and analysis are carried out from the point of view of geometry. After processing and analyzing the data, the law is summarized, and the method of safety evaluation based on geometric relationship and spatial angle relationship is put forward. Since there are few literatures on the possible sliding of wedge blocks from the angle of geometry and space, this paper presents and develops the research on the geometric orientation of wedge blocks in the experimental platform. Using the GeoSMA-3D system developed by the team, the spatial position parameters of wedge block in coordinate system are defined, and the key blocks are judged. The main work and research contents of this paper are as follows: firstly, the stability analysis method of rock slope is summarized. And different quality scoring system of jointed rock mass; Through analysis and comparison, the spatial angle correction parameters of plane damage and toppling damage are more comprehensive, but in the wedge block scoring system, there is less research on the spatial angle, through the reading of relevant literature. The spatial position factor of block with the largest weight in SMR method is determined, and the model of wedge block spatial angle is proposed. Secondly, in order to establish the model of wedge block spatial angle, the concept of variable angle space block sliding model test platform is put forward and the physical model is established. The wedge-shaped test blocks, represented by granite and mortar materials, were manufactured, and the sliding test of wedge-shaped test blocks obtained two angles under critical sliding state. Thirdly, the GM(1 in grey theory was applied. The results are as follows: 1) the model optimizes the data of laboratory test and summarizes its regularity. The contrast curves and equations between the granite wedge block and the mortar wedge block are obtained and the rotation angle of the wedge block is fitted. Based on the relationship between cross-section angle and inclined angle, a method of wedge safety evaluation based on spatial angle is proposed. Finally, using GeoSMA-3D software, the rotation angle and section angle of wedge block in coordinate system are defined, the spatial model of rock slope is established, and the three-dimensional structure plane network is simulated. Based on the change of slope slope slope inclination angle, the safety factor of wedge block is calculated by using the safety evaluation method of spatial angle, and compared with the key block obtained by analysis.
【學(xué)位授予單位】：東北大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU45

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