基于数量化理论的线状工程边坡稳定性快速评价方法研究

发布时间：2018-06-07 06:44

  本文选题：数量化理论 + 线状边坡稳定性指标体系　； 参考：《成都理工大学》2015年硕士论文

【摘要】：随着国家“一带一路”战略的提出,新一轮基础设施建设已经开始。这一战略的实施必然产生大量包括铁路及公路在内的线状工程建设。快速开挖形成大量工程边坡稳定性关系到工程进度、安全,在短时间内进行快速的稳定性评价不仅仅是工程建设要求,也是经济及效益的要求。本文以皖南山区汤屯及黄塔桃高速公路共77个边坡进行的调查为依托,结合线状工程建设初期的稳定性评价要求,对边坡稳定性评价进行快速评价方法研究,取得了以下进展:(1)建立了边坡稳定性快速评价指标体系。考虑边坡几何条件、结构面特征、岩体特征、诱发因素等四个影响因素,提出了以结构体形状、岩体结构类型、控制性软弱面与边坡组合、结构面类型、岩性组合特征、岩体强度、边坡高度、边坡坡度、降雨为评价项目的评价指标,并进一步细化为适合数量化理论计算的类目,建立了基于数量化理论的快速评价指标体系。(2)基于数量化理论,提出了边坡稳定性快速评价指标量化方法。建立了指标量化矩阵;基于项目贡献大小,进行指标筛选;利用样本偏相关系数、方差比、范围等进行项目的重要性排序;分析降雨影响边坡稳定性的机制,通过结构面特性、岩体结构类型对降雨下边坡的响应,进行了18组试算,计算获得了一组降雨条件下指标修正系数矩阵。(3)基于数量化理论,建立了边坡稳定性快速评价模型。利用数量化理论获得样本得分,利用比值定义法建立了边坡稳定性判别指标评价方法,并提出稳定性判别指标K计算公式;将数量化理论Ⅲ的计算结果转换的K值作为样品得分,应用于数量化理论Ⅰ的模型中,建立基于数量化理论的多元线性模型;在此基础上建立了适于野外工作的快速量化表格。(4)将所得快速评价模型应用于黄塔桃高速公路边坡稳定性评价,取得了较好的效果。在黄塔桃的高速公路边坡的稳定性评价应用中准确率为78.8%,误判的结果虽然占11.2%,所有的误判结果均比实际边坡评价要保守。
[Abstract]:With the national "Belt and Road" strategy put forward, a new round of infrastructure construction has begun. The implementation of this strategy will inevitably produce a large number of linear projects, including railways and highways. Rapid excavation of a large number of engineering slope stability is related to the progress of the project, safety, in a short period of time for rapid stability evaluation is not only the requirements of engineering construction, but also the requirements of economy and efficiency. Based on the investigation of 77 slopes in Tangtun and Huangtadao Expressway in southern Anhui, combined with the requirements of stability evaluation in the initial stage of linear engineering construction, the rapid evaluation method of slope stability is studied in this paper. A rapid evaluation index system for slope stability is established. Considering the four influencing factors of slope geometry condition, structural plane feature, rock mass characteristic and induced factor, this paper puts forward the combination of structural body shape, rock mass structure type, controlling weak surface and slope, structural plane type, lithologic combination characteristic, etc. Rock mass strength, slope height, slope gradient and rainfall are the evaluation indexes of evaluation items, and further refined into categories suitable for quantitative theoretical calculation. A rapid evaluation index system based on quantitative theory is established. A quantitative method for quick evaluation of slope stability is presented. The index quantification matrix is established; based on the project contribution, the index selection is carried out; the importance ranking of the project is carried out by using sample partial correlation coefficient, variance ratio, range, etc.; the mechanism of rainfall affecting slope stability is analyzed, and the characteristics of structure plane are analyzed. The response of rock mass structure type to slope under rainfall is calculated in 18 groups, and a fast evaluation model of slope stability is established based on quantitative theory. The sample score is obtained by quantitative theory, the evaluation method of slope stability discriminant index is established by the ratio definition method, and the calculation formula of stability discriminant index K is put forward. The K value converted from the calculation result of quantization theory 鈪，

本文编号：1990250