【摘要】：滑坡是一種常見的斜坡破壞型式，其特點(diǎn)是分布廣且危害嚴(yán)重，我國(guó)每年受滑坡災(zāi)害而造成的經(jīng)濟(jì)損失十分嚴(yán)重。因此，滑坡災(zāi)害受到國(guó)家的高度重視，并對(duì)滑坡災(zāi)害開展有關(guān)研究和積極的治理。 滑坡治理工程中的主要措施之一是抗滑樁工程，由于抗滑樁工程具有治理效果突出等特點(diǎn)，其在滑坡治理中得到了人們的廣泛采用。但抗滑樁有關(guān)設(shè)計(jì)參數(shù)的選取隨意性較大，因此，在抗滑樁治理工程中既要滿足安全可靠，又要達(dá)到節(jié)約投資比較困難。設(shè)計(jì)時(shí)若過于保守則會(huì)造成投資的浪費(fèi)，反之則存在較大的工程隱患。因此，開展抗滑樁治理方案優(yōu)化研究對(duì)抗滑樁工程的應(yīng)用具有重要意義。 本文重點(diǎn)主要是對(duì)抗滑樁治理方案及其參數(shù)進(jìn)行優(yōu)化研究，，以蘭州-成都原油管道工程BF123-BF125滑坡為案例，分析滑坡的特征及形成機(jī)理，并對(duì)其穩(wěn)定性進(jìn)行分析與評(píng)價(jià)，提出多種抗滑樁治理方案，進(jìn)行抗滑樁治理方案優(yōu)化研究。優(yōu)化研究主要分兩步，第一步是抗滑樁治理方案優(yōu)化研究，確定出最經(jīng)濟(jì)、安全且可行的抗滑樁治理方案，第二步是在第一步的基礎(chǔ)上對(duì)抗滑樁主要設(shè)計(jì)參數(shù)進(jìn)行優(yōu)化研究，主要通過對(duì)布設(shè)參數(shù)（樁間距）及樁的截面尺寸進(jìn)行優(yōu)化研究，以達(dá)到方案可行且方便施工和節(jié)約工程總投資的目的。 針對(duì)本文提出的優(yōu)化方法：①在抗滑樁間距優(yōu)化研究方面，根據(jù)抗滑樁與滑坡土體相互作用過程機(jī)理，構(gòu)建基于抗滑樁與滑坡土體相互作用過程模型，結(jié)合抗滑樁與滑坡體之間相互作用過程模型進(jìn)行分析，建立分別基于樁后土拱效應(yīng)和樁間土拱效應(yīng)的最小樁間距數(shù)學(xué)計(jì)算模型以及最大樁間距數(shù)學(xué)計(jì)算模型，在滿足抗滑樁安全的前提條件下，分析計(jì)算出合理的抗滑樁最小、最大樁間距，確定抗滑樁工程中樁間距的合理取值范圍。②在抗滑樁結(jié)構(gòu)參數(shù)的優(yōu)化研究方面，在滿足加固后穩(wěn)定性要求的前提下，抗滑樁抗彎、抗剪、側(cè)應(yīng)力以及構(gòu)造等要求的前提下，根據(jù)黃金分割法利用建立的優(yōu)化計(jì)算模型對(duì)抗滑樁截面尺寸進(jìn)行優(yōu)化研究，實(shí)現(xiàn)抗滑樁單樁費(fèi)用的最小化即是求解的最優(yōu)目標(biāo)。③最終，綜合樁間距及截面尺寸的優(yōu)化結(jié)果，確定抗滑樁最優(yōu)樁間距和截面尺寸，實(shí)現(xiàn)抗滑樁治理方案優(yōu)化的目的。
[Abstract]:Landslide is a common type of slope failure, which is characterized by widespread distribution and serious damage. The economic losses caused by landslide disasters are very serious in China. Therefore, the landslide disaster is highly valued by the state, and the landslide disaster research and active management. One of the main measures in landslide treatment is anti-slide pile engineering, which has been widely used in landslide treatment because of its outstanding effect. However, the selection of design parameters of anti-slide pile is random, so it is difficult to meet the safety and reliability in the anti-slide pile treatment project and to save the investment. If the design is too conservative, it will lead to the waste of investment. Therefore, it is of great significance to study the application of anti-slide pile control scheme optimization. This paper mainly focuses on the optimization of anti-slide pile treatment scheme and its parameters. Taking the BF123-BF125 landslide of Lanzhou Chengdu crude oil pipeline project as a case, the characteristics and formation mechanism of landslide are analyzed, and its stability is analyzed and evaluated. A variety of anti-slide pile treatment schemes are put forward to optimize the anti-slide pile treatment scheme. The optimization research is mainly divided into two steps. The first step is to optimize the anti-slide pile treatment scheme to determine the most economical, safe and feasible anti-slide pile treatment scheme. The second step is to optimize the main design parameters of anti-slide pile on the basis of the first step. Through the optimization of the layout parameters (pile spacing) and the section size of the pile, the project is feasible and convenient for construction and the total investment of the project can be saved. According to the mechanism of interaction between anti-slide pile and landslide soil, a model based on the interaction between anti-slide pile and landslide soil is established. Based on the analysis of the interaction process model between anti-slide pile and landslide body, the mathematical models of minimum pile spacing and maximum pile spacing are established based on the soil arch effect behind piles and soil arch effect between piles, respectively. Under the precondition of satisfying the safety of anti-slide pile, the reasonable minimum and maximum pile spacing is calculated, and the reasonable value range of pile spacing in anti-slide pile engineering is determined. 2 in the aspect of optimization research on structural parameters of anti-slide pile, On the premise of satisfying the requirements of stability after reinforcement and the requirements of anti-slide pile such as bending, shearing, lateral stress and structure, the section size of anti-slide pile is optimized according to the established optimization calculation model by golden section method. To minimize the cost of a single pile is the optimal goal of the solution. 3 finally, the optimal spacing and section size of the anti-slide pile are determined by synthesizing the results of the optimization of pile spacing and cross-section size, and the purpose of optimizing the treatment scheme of anti-slide pile is realized.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：P642.22;TU753.3

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本文編號(hào)：2407775