本文關鍵詞：土質邊坡抗滑樁支護穩(wěn)定性分析及參數(shù)優(yōu)化　出處：《太原理工大學》2017年碩士論文　論文類型：學位論文

  更多相關文章： 土質邊坡 抗滑樁 數(shù)值模擬 正交試驗 參數(shù)優(yōu)化

【摘要】：邊坡是廣泛分布于地表的一種地貌形態(tài),是普遍存在于各種工程活動中的地質地貌環(huán)境之一。但是由于邊坡工程是一個十分復雜的綜合性的巖土工程難題,如何能夠保證邊坡工程的穩(wěn)定性、經濟性和實用性仍然是當前現(xiàn)代化城市建設進程中一個非常重要的問題�？够瑯兑驗榫哂羞m用范圍廣、抗滑效果好、對周圍地質環(huán)境影響小等諸多突出的優(yōu)點,成為治理滑坡等地質災害中最主要的一種方法。邊坡工程的穩(wěn)定性受到邊坡自身的結構特性、地形地貌、土體性質、地質構造及抗滑樁的支護參數(shù)等情況的綜合影響,然而目前對每種因素的影響機理及權重的分析還不是很完善,還需要進一步研究和探索。從邊坡抗滑樁支護的機理出發(fā),利用Midas/GTS有限元數(shù)值模擬軟件,以安全系數(shù)和抗滑樁的水平位移為邊坡穩(wěn)定性的主要評價指標,使用單因素變量法對土體強度參數(shù)、坡角、地下水位和樁的位置四個因素對邊坡抗滑樁支護的穩(wěn)定性影響進行研究和分析,結果發(fā)現(xiàn)邊坡的穩(wěn)定性與土體粘聚力、內摩擦角、地下水位和坡角顯著相關,但是彈性模量和泊松比對邊坡穩(wěn)定性影響不大;當抗滑樁的位置在邊坡中部時,邊坡的穩(wěn)定性最好。以具體的人工邊坡加固工程為例,利用Midas/GTS數(shù)值模擬軟件,先用單因素變量法分析抗滑樁的樁長、樁間距和樁徑對邊坡穩(wěn)定性的影響。然后利用正交試驗設計的方法,在地層條件和抗滑樁的物理力學參數(shù)都一樣的前提下,選取樁長、樁間距和樁徑這三個因素,以邊坡的安全系數(shù)和抗滑樁的樁頂最大水平位移為評價指標,利用極差分析,發(fā)現(xiàn)樁間距對邊坡安全系數(shù)和樁頂水平位移的影響都是最大的,其次是樁徑,樁長的影響最小。根據(jù)以上分析,運用Matlab數(shù)學軟件將樁長、樁間距和樁徑三個因素對邊坡的綜合影響進行線性回歸分析,得到相關的經驗公式,由此得出邊坡穩(wěn)定性與這三個因素呈多元線性回歸,并表現(xiàn)為顯著相關。最后細化樁間距取值,以間距為單一變量,并結合其它因素的影響對該工程抗滑樁支護進行優(yōu)化設計,并運用Matlab數(shù)學軟件擬合出安全系數(shù)與樁間距的關系曲線,得到相關的經驗公式,為今后解決類似邊坡工程的穩(wěn)定性問題提供參考。
[Abstract]:Slope is a kind of geomorphologic form widely distributed on the surface, which is one of the geological and geomorphological environments in various engineering activities. However, slope engineering is a very complex and comprehensive geotechnical engineering problem. How to ensure the stability of slope engineering, economy and practicality is still a very important problem in the process of modern urban construction. Anti-slide pile has a wide range of application, good anti-slide effect. Many outstanding advantages, such as small influence on the surrounding geological environment, have become the most important method in the treatment of landslide and other geological disasters. The stability of slope engineering is affected by the structural characteristics of the slope itself, topography and geomorphology, and soil properties. The comprehensive influence of geological structure and supporting parameters of anti-slide pile, however, the analysis of the influence mechanism and weight of each factor is not perfect. According to the mechanism of slope anti-slide pile support, Midas/GTS finite element numerical simulation software is used. Taking the safety factor and horizontal displacement of anti-slide pile as the main evaluation index of slope stability, the single factor variable method is used to evaluate the soil strength parameters and slope angle. The influence of groundwater level and pile position on the stability of slope anti-slide pile support is studied and analyzed. The results show that the stability of slope is significantly related to the cohesion of soil, the angle of internal friction, the groundwater level and the angle of slope. However, elastic modulus and Poisson ratio have little effect on slope stability. When the anti-slide pile is located in the middle of the slope, the stability of the slope is the best. Taking the concrete artificial slope reinforcement project as an example, the numerical simulation software Midas/GTS is used. The single factor variable method is used to analyze the influence of pile length, pile spacing and pile diameter on slope stability, and then the orthogonal design method is used. On the premise of the same physical and mechanical parameters of the anti-slide pile, the safety factor of slope and the maximum horizontal displacement of the pile top are taken as the evaluation index, and the pile length, the pile spacing and the pile diameter are selected as the three factors. By means of range analysis, it is found that the influence of pile spacing on slope safety factor and pile top horizontal displacement is the largest, followed by pile diameter and pile length. The comprehensive influence of pile length, pile spacing and pile diameter on slope is analyzed by Matlab software, and relevant empirical formulas are obtained. It is concluded that the slope stability is multiple linear regression with these three factors, and the correlation is significant. Finally, the value of pile spacing is refined, and the spacing is taken as a single variable. Combined with other factors to optimize the design of anti-slide pile support, and use Matlab mathematical software to fit the relationship curve between safety factor and pile spacing, and get the relevant empirical formula. It provides a reference for solving the stability problem of similar slope engineering in the future.
【學位授予單位】：太原理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU753.8;TU43

【相似文獻】

相關期刊論文 前10條

1 鄭束寧,孫小三,呂慶,尚岳全;優(yōu)化設計理論在抗滑樁工程中的應用[J];工程地質學報;2003年03期

2 劉新榮;梁寧慧;瞿萬波;孫輝;陳曉江;;基于遺傳算法的抗滑樁優(yōu)化設計[J];中國地質災害與防治學報;2006年04期

3 李遠寧;石勝偉;吳保和;;預應力混凝土抗滑樁實驗與數(shù)值計算[J];中國地質災害與防治學報;2006年04期

4 胡新麗;李長冬;王亮清;;抗滑樁截面經濟優(yōu)化設計探討[J];地質科技情報;2007年03期

5 李長冬;胡新麗;湯e，

本文編號：1405686