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多滑面深层滑坡抗滑桩治理方案优化研究

发布时间:2019-01-12 12:27  文章来源:笔耕文化传播
【摘要】:滑坡是一种常见的斜坡破坏型式,其特点是分布广且危害严重,我国每年受滑坡灾害而造成的经济损失十分严重。因此,滑坡灾害受到国家的高度重视,并对滑坡灾害开展有关研究和积极的治理。 滑坡治理工程中的主要措施之一是抗滑桩工程,由于抗滑桩工程具有治理效果突出等特点,其在滑坡治理中得到了人们的广泛采用。但抗滑桩有关设计参数的选取随意性较大,因此,在抗滑桩治理工程中既要满足安全可靠,又要达到节约投资比较困难。设计时若过于保守则会造成投资的浪费,反之则存在较大的工程隐患。因此,开展抗滑桩治理方案优化研究对抗滑桩工程的应用具有重要意义。 本文重点主要是对抗滑桩治理方案及其参数进行优化研究,,以兰州-成都原油管道工程BF123-BF125滑坡为案例,分析滑坡的特征及形成机理,并对其稳定性进行分析与评价,提出多种抗滑桩治理方案,进行抗滑桩治理方案优化研究。优化研究主要分两步,第一步是抗滑桩治理方案优化研究,确定出最经济、安全且可行的抗滑桩治理方案,第二步是在第一步的基础上对抗滑桩主要设计参数进行优化研究,主要通过对布设参数(桩间距)及桩的截面尺寸进行优化研究,以达到方案可行且方便施工和节约工程总投资的目的。 针对本文提出的优化方法:①在抗滑桩间距优化研究方面,根据抗滑桩与滑坡土体相互作用过程机理,构建基于抗滑桩与滑坡土体相互作用过程模型,结合抗滑桩与滑坡体之间相互作用过程模型进行分析,建立分别基于桩后土拱效应和桩间土拱效应的最小桩间距数学计算模型以及最大桩间距数学计算模型,在满足抗滑桩安全的前提条件下,分析计算出合理的抗滑桩最小、最大桩间距,确定抗滑桩工程中桩间距的合理取值范围。②在抗滑桩结构参数的优化研究方面,在满足加固后稳定性要求的前提下,抗滑桩抗弯、抗剪、侧应力以及构造等要求的前提下,根据黄金分割法利用建立的优化计算模型对抗滑桩截面尺寸进行优化研究,实现抗滑桩单桩费用的最小化即是求解的最优目标。③最终,综合桩间距及截面尺寸的优化结果,确定抗滑桩最优桩间距和截面尺寸,实现抗滑桩治理方案优化的目的。
[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.
【学位授予单位】:长安大学
【学位级别】:硕士
【学位授予年份】:2014
【分类号】:P642.22;TU753.3

【参考文献】

相关期刊论文 前10条

1 佴磊,马丽英,冷曦晨,于清杨;滑坡治理中的抗滑桩设计[J];吉林大学学报(地球科学版);2002年02期

2 门宝辉,黄金柏,李树桥;黄金分割法在渠道断面设计中的应用[J];东北农业大学学报;2000年03期

3 李长冬;胡新丽;汤e

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