【摘要】：隨著抗滑樁在堆積層滑坡治理工程的中的廣泛應(yīng)用,其應(yīng)用于滑坡治理方面的研究成果也隨著增多,但是仍存在著許多的不足和急需改進(jìn)的地方。因此,綜合考慮多種因素對(duì)抗滑樁樁土作用的影響以完善相關(guān)計(jì)算模型具有重要的理論意義和現(xiàn)實(shí)意義。本文以漳龍鐵路茶陽(yáng)車(chē)站滑坡為主要研究對(duì)象,在查閱相關(guān)文獻(xiàn)的基礎(chǔ)上,采用理論分析、實(shí)驗(yàn)采集和數(shù)值模擬分析相結(jié)合的方法,主要做了以下內(nèi)容的研究及相關(guān)成果如下:(1)通過(guò)對(duì)巖土體現(xiàn)場(chǎng)取樣在實(shí)驗(yàn)室條件下取得巖土體的各項(xiàng)參數(shù),以確保其準(zhǔn)確性并保證后續(xù)的數(shù)值模擬計(jì)算所需參數(shù)的嚴(yán)謹(jǐn)性;(2)收集數(shù)據(jù),結(jié)合新、老滑坡的形態(tài)特征及邊界條件對(duì)滑坡穩(wěn)定性進(jìn)行定性及定量評(píng)價(jià)得出:LHP1總體上處于穩(wěn)定狀態(tài),LHP2處于穩(wěn)定~基本穩(wěn)定狀態(tài),而XHP1處于欠穩(wěn)定~不穩(wěn)定狀態(tài),有再次發(fā)生滑動(dòng)可能性;(3)通過(guò)地基校核反復(fù)計(jì)算,最終確定抗滑樁樁截面和樁間距。并根據(jù)抗滑樁的上限和下限條件為抗滑樁進(jìn)行配筋計(jì)算,保證抗滑樁配筋在經(jīng)濟(jì)配筋率之內(nèi),最大可能的在保證安全的基礎(chǔ)上更加經(jīng)濟(jì);(4)結(jié)合實(shí)例分析在不同工況下滑坡-抗滑樁作用體系包括滑坡變形控制、抗滑樁內(nèi)力變化和樁間土工效應(yīng)的數(shù)值模擬三維分析得出:(1)在滑坡防治中,抗滑樁的設(shè)置可以一定程度的減小滑坡位移變形;同時(shí)隨著降雨入滲,巖土體的飽和度及孔隙壓力會(huì)增大使得其基質(zhì)吸力降低、有效應(yīng)力減小而出現(xiàn)卸荷回彈現(xiàn)象,這是坡中為什么會(huì)出現(xiàn)一定的膨脹的主要原因;(2)隨著滑坡位移的增加,抗滑樁在X方向?qū)⒊惺芨蟮耐屏?同時(shí)分析得出X向應(yīng)力矢量圖呈梯形分布,因力是相互的由此可以推斷滑坡推力也呈梯形分布(這是與手算誤差的原因之一);(3)在從滑坡開(kāi)始滑動(dòng)直到處于穩(wěn)定,土拱作用一直存在直到樁周土體達(dá)到平衡,這里可以認(rèn)為土拱是由巖土體的不均勻位移造成,其本身是由應(yīng)力從不平衡到最終平衡的動(dòng)態(tài)過(guò)程。
[Abstract]:With the wide application of anti-slide pile in the landslide treatment project of accumulation layer, the research results of its application in landslide treatment also increase, but there are still many deficiencies and urgent need for improvement. Therefore, it is of great theoretical and practical significance to consider comprehensively the influence of various factors on the action of sliding pile and soil in order to improve the relevant calculation model. In this paper, the landslide of Chayang Station of Zhanglong Railway is taken as the main research object, based on the reference of relevant documents, the method of combining theoretical analysis, experimental collection and numerical simulation analysis is adopted. The main research and related results are as follows: (1) the parameters of rock and soil are obtained by sampling the rock and soil in the laboratory. To ensure its accuracy and to ensure the rigour of the parameters required for subsequent numerical simulation calculations; (II) data collection, combined with the new, Qualitative and quantitative evaluation of landslide stability by morphological characteristics and boundary conditions of the old landslide shows that: LHP1 is in a stable state in general and LHP2 is in a stable to basic stable state, while XHP1 is in an unsteady ~ unstable state. It is possible to slide again. (3) the cross-section and spacing of anti-slide pile are determined by repeated calculation of foundation check. According to the upper and lower limit conditions of the anti-slide pile, the reinforcement of the anti-slide pile is calculated to ensure that the reinforcement of the anti-slide pile is within the economic reinforcement ratio. It is possible to be more economical on the basis of ensuring safety. (4) combined with practical examples, the landslide-anti-slide pile action system including landslide deformation control is analyzed under different working conditions. The numerical simulation results of internal force change and soil effect between piles are as follows: (1) in landslide prevention and control, the setting of anti-slide pile can reduce the displacement and deformation of landslide to a certain extent, at the same time, with the infiltration of rainfall, The increase of saturation and pore pressure of rock and soil will reduce the suction of matrix and reduce the effective stress, which is the main reason why there is a certain expansion in the slope. (2) with the increase of the displacement of the landslide, The anti-slide pile will bear more thrust in X direction. At the same time, the X-direction stress vector diagram is found to be trapezoidal distribution. Because the forces are mutual, it can be inferred that the thrust of the landslide is also trapezoidal distribution (which is one of the reasons for the error in hand calculation) from the landslide to the stability, the soil arch exists until the soil around the pile reaches equilibrium. It can be considered that the soil arch is caused by the uneven displacement of the rock and soil, and it is a dynamic process from the stress unbalance to the final equilibrium.
【學(xué)位授予單位】：河南工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：P642.22;TU473.1

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本文編號(hào)：2152118