本文選題：土質(zhì)邊坡 + 數(shù)值模擬��； 參考：《南京大學(xué)》2014年碩士論文

【摘要】：在我國經(jīng)濟(jì)建設(shè)和西部大開發(fā)進(jìn)程中,高速公路建設(shè)對于帶動地方經(jīng)濟(jì)的發(fā)展具有重要作用。西部省份許多高速公路需穿越群山峻嶺及丘陵地帶,其地質(zhì)環(huán)境較為復(fù)雜,在高速公路建設(shè)中誘發(fā)一些環(huán)境巖土工程問題,給高速公路建設(shè)帶來很大的困難,同時也提出了一些新的巖土工程課題,高度公路路塹邊坡的穩(wěn)定性問題即為其中之一。 本文以湖南汝郴高速公路土建工程C12合同2號邊坡綜合防護(hù)工程為依托,通過理論分析、現(xiàn)場工程地質(zhì)勘察、數(shù)值模擬和現(xiàn)場監(jiān)測相結(jié)合的方法,對2號邊坡的穩(wěn)定性進(jìn)行分析,并提出了治理措施。本論文的主要工作有： (1)在廣泛閱讀國內(nèi)外有關(guān)研究資料,系統(tǒng)的闡述了巖土體邊坡穩(wěn)定性的分析方法,分析了影響邊坡穩(wěn)定性的因素,討論了幾種邊坡工程常用的支護(hù)方法及其適用條件。從而為邊坡穩(wěn)定性的分析及選擇經(jīng)濟(jì)合理的邊坡支護(hù)方案提供技術(shù)支撐。 (2)運用巖土工程勘察技術(shù)查明邊坡工程地質(zhì)條件,采用極限平衡理論對邊坡的穩(wěn)定性進(jìn)行評價。計算結(jié)果表明,未經(jīng)加固治理的邊坡安全系數(shù)僅為Fs=0.49,顯然邊坡處于不穩(wěn)定狀態(tài)。 (3)論文針對該邊坡工程的特點,給出了邊坡加固治理方案,即自旋錨管+鋼絲網(wǎng)+噴射混凝土層的加固方案,并采用極限平衡法對加固治理后的邊坡穩(wěn)定性進(jìn)行評價,計算結(jié)果表明加固后的邊坡的安全系數(shù)為Fs=1.425,可以滿足相關(guān)規(guī)范要求。 (4)為了進(jìn)一步分析這一加固治理方案的可行性,論文還采用巖土數(shù)值模擬有限元軟件MIDAS對加固后邊坡穩(wěn)定性進(jìn)行計算分析,數(shù)值模擬結(jié)果顯示加固后的邊坡的安全系數(shù)為Fs=1.425,可以滿足工程安全及相關(guān)規(guī)范要求,該邊坡加固方案是可行的。 (5)制定邊坡加固方案施工技術(shù)措施及現(xiàn)場監(jiān)測方案,邊坡施工現(xiàn)場監(jiān)測結(jié)果表明,加固治理后的邊坡最大變形量在變形允許范圍之內(nèi),邊坡處于穩(wěn)定狀態(tài)。充分表明這一邊坡加固方案是行之有效的,可為類似工程提供技術(shù)參考。
[Abstract]:In the process of economic construction and western development in China, highway construction plays an important role in driving the development of local economy. Many highways in the western provinces need to pass through the mountains and hilly areas, and their geological environment is relatively complex. Some environmental geotechnical engineering problems are induced in the expressway construction, which brings great difficulties to the highway construction. At the same time, some new geotechnical engineering problems are put forward, one of which is the stability of high-altitude highway cutting slope. Based on the C12 contract No. 2 Slope Comprehensive Protection Project of Hunan Ru-Chen Expressway, through theoretical analysis, field engineering geological survey, numerical simulation and on-site monitoring, the paper combines the methods of theoretical analysis, field engineering geological survey, numerical simulation and on-site monitoring. The stability of slope No. 2 is analyzed, and the treatment measures are put forward. The main work of this paper is as follows: (1) in the extensive reading of domestic and foreign related research materials, the analysis method of rock and soil slope stability is systematically expounded, and the factors influencing slope stability are analyzed. Several common supporting methods and their applicable conditions for slope engineering are discussed. Therefore, it provides technical support for the analysis of slope stability and the selection of economic and reasonable slope support schemes. (2) using geotechnical engineering survey technology to find out the slope engineering geological conditions, The limit equilibrium theory is used to evaluate the slope stability. The calculated results show that the safety factor of the unreinforced slope is only 0.49, obviously the slope is in an unstable state. (3) according to the characteristics of the slope engineering, the paper gives the slope reinforcement treatment scheme. That is, the reinforcement scheme of spin-anchor pipe steel wire mesh sprayed concrete layer, and the ultimate equilibrium method is used to evaluate the stability of the slope after reinforcement and treatment. The calculated results show that the safety factor of the reinforced slope is 1.425, which can meet the requirements of relevant codes. (4) in order to further analyze the feasibility of the reinforcement scheme, The stability of the reinforced slope is calculated and analyzed by the finite element software Midas. The results show that the safety factor of the reinforced slope is Fs1.425, which can meet the requirements of engineering safety and related codes. The slope reinforcement scheme is feasible. (5) the technical measures and site monitoring scheme of the slope reinforcement scheme are formulated. The results show that the maximum deformation of the slope after reinforcement treatment is within the allowable range of deformation. The slope is in a stable state. It fully shows that the slope reinforcement scheme is effective and can provide technical reference for similar projects.
【學(xué)位授予單位】：南京大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U416.14

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