本文選題：結(jié)構(gòu)面網(wǎng)絡模擬 + 節(jié)理巖體模型　； 參考：《長沙理工大學》2014年碩士論文

【摘要】：土木工程建設(shè)中,經(jīng)常遇到工程巖體的穩(wěn)定性問題。由于巖體的復雜結(jié)構(gòu)特性,如何正確的模擬復雜節(jié)理巖質(zhì)邊坡并分析其穩(wěn)定性一直以來是巖石力學中的一個難題。而塊體模型在結(jié)構(gòu)性巖體的分析方面具有連續(xù)介質(zhì)分析方法無法替代的優(yōu)勢和特點,現(xiàn)已成為分析復雜節(jié)理巖體穩(wěn)定性的主要方法。塊體模型分析方法中,模型的幾何建立是很關(guān)鍵的,其直接反應了結(jié)構(gòu)面的分布規(guī)律。因為結(jié)構(gòu)面控制了巖體力學性能,所建立的塊體模型也控制了分析結(jié)果,其對分析結(jié)果的影響遠遠大于連續(xù)體分析的模型如有限元模型。然而迄今為止,以離散單元法(Discrete Element Method, DEM)等分析方法為代表的塊體模型分析方法,仍無法在巖體工程分析中表現(xiàn)出與有限元等連續(xù)介質(zhì)分析方法同樣的受到重視并發(fā)揮其作用；同時其發(fā)展和應用仍然受到一些關(guān)鍵技術(shù)的制約和影響,其難點之一就是如何快速的建立與巖體結(jié)構(gòu)面分布規(guī)律相符合的塊體分析模型。本文利用結(jié)構(gòu)面網(wǎng)絡模擬技術(shù)的優(yōu)勢,通過Matlab編程對模擬的巖體節(jié)理數(shù)據(jù)做了預處理,自動生成結(jié)構(gòu)面網(wǎng)絡模擬圖和離散元軟件UDEC的建模命令文件。在UDEC軟件中調(diào)入建模命令文件,就可以快速得到與節(jié)理分布模型對應的塊體分析模型。結(jié)合邊坡實例,將生成的塊體分析模型進行邊坡穩(wěn)定性分析,通過與UDEC原有的統(tǒng)計節(jié)理生成器生成的塊體分析模型相比較,發(fā)現(xiàn)本文建立的塊體分析模型,其塊體劃分符合巖體結(jié)構(gòu)面的分布規(guī)律,而且所計算的安全系數(shù)離散程度較小。實例說明了本文的建模方案行之有效,為復雜節(jié)理巖體塊體分析模型建模提供了一有效途徑。
[Abstract]:In the construction of civil engineering, the stability of the rock mass is often encountered. Because of the complex structural characteristics of the rock mass, it is always a difficult problem to correctly simulate the complex jointed rock slope and analyze its stability. The block model can not replace the continuous medium analysis method in the analysis of structural rock mass. The advantages and characteristics of the generation have now become the main method to analyze the stability of complex jointed rock mass. In the method of block model analysis, the geometric establishment of the model is critical, which directly reflects the distribution of the structural plane. Because the structural plane controls the mechanical properties of the rock mass, the established block model also controls the analysis results. The effect of the fruit is far greater than the model of the continuum analysis, such as the finite element model. However, so far, the block model analysis method, represented by the discrete element method (Discrete Element Method, DEM) and so on, is still unable to show the same importance as the finite element method of continuous medium analysis in the rock mass engineering analysis. At the same time, its development and application are still restricted and influenced by some key technologies. One of the difficulties is how to quickly establish a block analysis model which is consistent with the distribution law of rock mass. In this paper, using the advantages of the network simulation technology of structural surface, the simulated rock jointing data is pre placed through Matlab programming. The structure surface network simulation graph and the modeling command file of the discrete element software UDEC are automatically generated. The block analysis model corresponding to the joint distribution model can be quickly obtained by adjusting the modeling command files in the UDEC software. Compared with the block analysis model generated by the joint generator, it is found that the block analysis model established in this paper conforms to the distribution law of the structural plane of rock mass, and the calculated safety coefficient is small. The example shows that the modeling scheme is effective and provides the model modeling for complex jointed rock mass block. An effective way.
【學位授予單位】：長沙理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TU45
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本文編號：1959903