本文關(guān)鍵詞：高填方路堤破壞成因及處治分析　出處：《河南工業(yè)大學》2014年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 穩(wěn)定性分析 監(jiān)測 有限元分析 邊坡處治 抗滑樁

【摘要】：近年來，由于全球地質(zhì)運動及極端氣候條件的影響，我國發(fā)生的滑坡及邊坡破壞較多，造成了較大的人員傷亡與財產(chǎn)損失。目前邊坡及滑坡分析及處治的方法較多，通過對濟邵高速K280段搶險工程進行分析，，對各種穩(wěn)定性方法計算安全系數(shù)、確定滑動面所在的位置和形狀等進行了對比，并對抗滑樁處治中的一些規(guī)律做出了總結(jié)。主要工作有： 首先，通過對滑坡地段的工程勘察、穩(wěn)定性監(jiān)測、理論計算、有限元分析等手段，分析濟邵高速K280段路面及邊坡破壞的原因及滑坡變形發(fā)展的現(xiàn)狀，比較各種方法分析過程及所得結(jié)論的異同，分析其中的原因，比較各種方法的優(yōu)缺點。通過工程勘察與滑坡穩(wěn)定性監(jiān)測工作采集數(shù)據(jù)并對結(jié)果進行分析整理，初步確定了濟邵高速K280破壞原因。高邊坡自身由于受到降水影響，抗剪強度值降低，邊坡安全系數(shù)較低，穩(wěn)定性不足，路基出現(xiàn)了不均勻沉降，高速公路整體沿路堤與原地面交界處產(chǎn)生滑動。 其次，通過理論計算，描述了邊坡的高度、邊坡坡度、土體抗剪強度指標等取值對于邊坡穩(wěn)定性的影響，考慮不同安全系數(shù)的定義對于滑坡推力計算的影響。對比極限平衡法中的瑞典法、Bishop法和Janbu法等計算方法所得到結(jié)果的差異，分析出現(xiàn)差異的原因以及影響計算結(jié)果的因素，并采用極限平衡法對濟邵高速進行計算分析，驗證了工程勘察和監(jiān)測工作的結(jié)論。通過有限元分析計算，進一步驗證了濟邵高速K280段滑動面位于填方路基和原地面的交界處以及高邊坡自身穩(wěn)定性存在不足的結(jié)論。 最后，簡單介紹了目前常用的加固邊坡和處理滑坡的常用措施，對濟邵高速K280段搶險方案進行評價。通過理論計算，對抗滑樁樁間距變化以及端頭是否施加預(yù)應(yīng)力錨索而引起的樁身的彎矩、剪力、樁頂?shù)奈灰浦导巴练戳Φ淖兓?guī)律做了總結(jié)。通過有限元計算，進一步印證理論計算的結(jié)果，比較計算結(jié)果的差異以及對出現(xiàn)的原因進行了分析。
[Abstract]:In recent years, due to the influence of global geological movement and extreme climatic conditions, more landslides and slope damage occurred in China. At present, there are many methods to analyze and treat the slope and landslide. Through the analysis of the rescue project of Ji-Shao High-speed K280 Section, the safety factor is calculated by various stability methods. The position and shape of the sliding surface are compared, and some rules in the treatment of the anti-slide pile are summarized. The main work is as follows: Firstly, by means of engineering investigation, stability monitoring, theoretical calculation, finite element analysis and so on, the causes of pavement and slope failure and the present situation of landslide deformation are analyzed. This paper compares the analysis process of various methods and the similarities and differences of the conclusions, analyzes the causes, compares the advantages and disadvantages of the various methods, and analyzes and collates the results through engineering investigation and landslide stability monitoring. The reason for the failure of Ji-Shao high-speed K280 is preliminarily determined. Due to the influence of precipitation, the shear strength of the high slope decreases, the slope safety coefficient is low, the stability is insufficient, and the subgrade is unevenly settled. The whole expressway along the embankment and the original ground to produce a slip at the junction. Secondly, the influence of slope height, slope gradient and soil shear strength on slope stability is described by theoretical calculation. Considering the influence of different definitions of safety factor on the calculation of landslide thrust, the difference between the results obtained by the Swedish method Bishop method and the Janbu method is compared in the limit equilibrium method. This paper analyzes the causes of the difference and the factors influencing the calculation results, and uses the limit equilibrium method to calculate and analyze the Ji-Shao High Speed, which verifies the conclusion of the engineering investigation and monitoring work, and calculates by the finite element analysis. The conclusion that the sliding surface of Ji-Shao high-speed K280 section is located at the junction between the embankment and the original ground and the stability of the high slope itself is proved to be insufficient. Finally, the paper briefly introduces the commonly used measures of slope reinforcement and landslide treatment, and evaluates the rescue plan of Ji-Shao High-speed K280 Section. The theoretical calculation is carried out. In this paper, the variation of pile bending moment, shear force, displacement value of pile top and soil reaction force caused by the change of pile spacing and whether the end head is subjected to prestressed anchor cable is summarized. The finite element method is used to calculate the bending moment, shear force, displacement value of pile top and soil reaction force. The results of theoretical calculation are further confirmed, the differences of calculation results are compared and the causes of occurrence are analyzed.
【學位授予單位】：河南工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U418.5

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