[最新文献]落石防护路堤计算设计优化方法的开发[11/21/2020]

1 论文

Development of a computational design optimization method for rockfall protection embankments 落石防护路堤计算设计优化方法的开发

Abstract: This study proposes an optimization method based on numerical rockfall simulation for determining the layout of a protection embankment. The method mainly focuses on two design parameters: the distance between the slope and the embankment and the length of the embankment. In terms of these two decision variables, an optimization problem that aims to minimize the construction cost of the embankment subject to the safety requirement is formulated. By solving this optimization problem, an optimal layout plan for an embankment at a site of interest can be identified. The result of the optimization is objective and quantitative. Therefore, we can also choose the best one from several types of embankments with different design conditions and costs. To confirm the performance of the proposed method, an application example was conducted with a virtual rock-slope model. For the rockfall trajectory simulations in this application, we employed the discrete element method (DEM). The optimization process was then carried out on 50 different groups of computed trajectories to determine the most economic and stable construction plan among several types of embankments and all possible layouts. The reliability of the result was also supported by the fact that the variations in the optimal solutions were reduced as the sample size increased.

Keywords: Rockfall, Optimization problem, Discrete element method, Risk reduction, Disaster prevention

摘要: 本研究提出了一种基于数值落石模拟的优化方法，用于确定防护路堤的布局。该方法主要集中在两个设计参数上：边坡与路堤之间的距离以及路堤的长度。根据这两个决策变量，提出了一个优化问题，旨在使符合安全要求的路堤建设成本最小化。通过解决此优化问题，可以确定目标站点路堤的最佳布局方案。优化的结果是客观和定量的。因此，我们还可以从具有不同设计条件和成本的几种类型的路堤中选择最佳的一种。为了确认所提方法的性能，以虚拟岩石边坡模型为例进行了应用。对于此应用中的落石轨迹模拟，我们采用了离散元方法(DEM)。然后对50个不同的计算轨迹组进行优化过程，以确定几种类型的路堤和所有可能的布局中最经济，最稳定的施工计划。结果的可靠性还受到以下事实的支持：最佳解决方案中的差异随着样本量的增加而减小。

2 相关文献

Note: '相关文献' 是按照Google的排序算法产生出来的.

[1] Rockfall characterisation and structural protection – a review

[2] A Reliability-Based Approach for the Design of Rockfall Protection Fences

[3] Optimal design for high resistant rockfall barriers

[4] Reliability-Based Design of Protection Net Fences: Influence of Rockfall Uncertainties through a Statistical Analysis

[5] Energy Dissipating Devices in Falling Rock Protection Barriers 

[6] A Novel Approach to Assess the Ability of a Protection Barrier to Mitigate Rockfall Hazard

[7] Design of reinforced ground embankments used for rockfall protection

[8] Guidelines for Certification and Management of Rockfall Fence Systems

[9] Design of rockfall net fences and the new ETAG 027 European guideline

[10] Improving Rebound Models in 3D Rockfall Simulation Codes Used for the Design of Protection Embankments

3 参考文献

[1] ]Miller, S.M., Girard, J.M., and McHugh, E. (2000). Computer modeling of catch benches to mitigate rockfall hazards in open pit mines. Pacific Rocks 2000, Balkema, Rotterdam, pp. 539-545.

岩石崩落分析(Analysis of Rockfall)方法简述

新的Cadanav方**---基于三维轨迹模拟的落石危险区域划分

GIIC-UDEC操作教程(2)---岩石滚落

岩土边坡的破坏类型(C3)(Failure types of slope)

不稳定边坡的防护和治理措施