【摘要】：目前我國處于經(jīng)濟建設(shè)的快速增長期,各類公路橋梁及民用建筑的數(shù)量也在快速增長。在以上工程的選址和施工過程中經(jīng)常會出現(xiàn)大量的巖質(zhì)邊坡。當(dāng)邊坡發(fā)生較大變形或破壞時會導(dǎo)致眾多嚴(yán)重的后果,其不僅會造成工程本身的損毀,還有可能造成重大的經(jīng)濟損失和人員傷亡。因此巖質(zhì)邊坡的穩(wěn)定性問題也開始受到更多的關(guān)注。首先巖石是由許多孔隙、多種礦物晶粒以及膠結(jié)物組成的混合體。在歷經(jīng)億萬年的地質(zhì)演變以及復(fù)雜地構(gòu)造運動后,巖石會含有隨機分布的微孔隙與裂紋。在宏觀尺度上,天然巖體又被多種地質(zhì)構(gòu)造面(節(jié)理、斷層和弱面)所切割。這些重要的特點使巖石成為一種復(fù)雜而又特殊的材料,它不是離散介質(zhì),也不是連續(xù)介質(zhì),而是屬于連續(xù)與離散的耦合介質(zhì)。邊坡發(fā)生變形和破壞是一個長期的變化過程,其穩(wěn)定性受邊坡內(nèi)在因素和外部因素等多種條件的影響。內(nèi)部因素包括:組成邊坡的巖土體類型及性質(zhì)、邊坡地質(zhì)構(gòu)造、邊坡形態(tài)等;外部因素包括:氣候條件、風(fēng)化作用、坡體植被、人類工程活動等。在一定的工程地質(zhì)條件下,有些因素對邊坡穩(wěn)定性影響較大,而有些則較小。這就是說影響因素對邊坡失穩(wěn)的貢獻(xiàn)是不同的。找出邊坡失穩(wěn)主要影響因子對邊坡失穩(wěn)災(zāi)害的防治及人工邊坡的設(shè)計具有重要意義。本文基于強度折減法,應(yīng)用ABAQUS有限元分析軟件對邊坡的主要內(nèi)在因素進(jìn)行計算分析,探究其對邊坡失穩(wěn)和變形的影響水平并進(jìn)行研究。研究結(jié)果表明:邊坡的安全系數(shù)Fs與其中一些影響因素的關(guān)系顯著。借助各影響因素的分析結(jié)果,將有利于針對主要影響因素對邊坡進(jìn)行加固處理。
[Abstract]:At present, China is in the period of rapid economic growth, and the number of highway bridges and civil buildings is also growing rapidly. A large number of rock slopes often occur during the site selection and construction of the above projects. When the slope is deformed or destroyed, it will lead to many serious consequences, which will not only cause damage to the project itself, but also may cause serious economic losses and casualties. Therefore, more attention has been paid to the stability of rock slope. First, rock is a mixture of many pores, a variety of mineral grains, and cementation. After billions of years of geological evolution and complex tectonic movement, rocks contain randomly distributed micropores and cracks. On macro scale, natural rock mass is cut by various geological structural planes (joints, faults and weak planes). These important characteristics make rock become a kind of complex and special material. It is not a discrete medium nor a continuum medium, but a continuous and discrete coupling medium. Slope deformation and failure is a long-term process of change, and its stability is affected by many conditions, such as internal factors and external factors. The internal factors include the types and properties of the rock and soil, the geological structure of the slope, the shape of the slope and so on, while the external factors include: climatic conditions, weathering, slope vegetation, human engineering activities and so on. Under certain engineering geological conditions, some factors have great influence on slope stability, while some factors have little effect on slope stability. This means that the contribution of influencing factors to slope instability is different. Finding out the main influencing factors of slope instability is of great significance to the prevention of slope instability and the design of artificial slope. In this paper, based on the strength reduction method, the main internal factors of slope are calculated and analyzed by using ABAQUS finite element analysis software, and the influence level on slope instability and deformation is explored and studied. The results show that the safety factor (Fs) of the slope is significantly related to some of the influencing factors. With the help of the analysis results of various influencing factors, it will be advantageous to reinforce the slope according to the main influencing factors.
【學(xué)位授予單位】：沈陽建筑大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU457

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 劉學(xué)昆;崔n，

本文編號：2259008