对挖掘对非平面交叉道的影响的三维模拟分析
Mehdi Arash1, Alireza Dolatshahi2, Kourosh Shahriar1
1Dept. of Mining Engineering, Amirkabir University of Technology, Tehran, Iran.
Scientific reports
|December 18, 2025
概括
道交叉角度和间距显著影响城市道的稳定性. 中距离的角度和适度的间距减少了定居点和层力量,提高了复杂的地下施工中的安全性.
科学领域:
- 地质技术工程 地质技术工程
- 道和地下建筑工程
- 计算力学 计算力学 计算力学
背景情况:
- 城市地下基础设施的快速增长需要可靠的非水平穿越道设计.
- 道的接近导致复杂的土壤结构相互作用,影响现有道的安全性和可用性.
- 有限的研究存在于交叉角度,垂直间距和挖掘序列的联合影响.
研究的目的:
- 系统地研究不同几何和施工参数下的非级别过路道的机械行为.
- 分析交叉角度,垂直间距和挖掘序列对道层和周围土壤的影响.
- 为改善城市地下道设计准则提供数据驱动的见解.
主要方法:
- 使用Plaxis 3D进行了系统的三维有限元素分析.
- 进行了参数研究,改变了交叉角度,垂直道间距和挖掘序列.
- 监测道层力量 (轴向,曲,扭曲) 和土壤变形 (移位,塑性点,剪切应变).
主要成果:
- 交叉角度是主要的:中等范围的角度 (约. 45°) 最小化定居点 (减少高达60%),并降低了层力量.
- 与10米相比,中间垂直距离 (12.5米) 减少了约30%的定居点;较大的距离 (15米) 增加了迁移.
- 挖掘序列影响变形:浅先导致更高的局部定居点,而深先在更广的区域减少了10-12%的峰值移位.
结论:
- 几何 (角度,间距) 和施工 (序列) 参数对于非级别交叉口道设计至关重要.
- 最佳设计涉及中间交叉角度和适度的垂直间距,以减少定居点和力量.
- 挖掘序列的选择需要平衡峰值沉积减少与地面干扰的程度.
相关概念视频
Profile Leveling and Cross Sections
1.5K
Profile leveling and cross-sections are surveying methods used to determine and document terrain elevations for infrastructure projects such as highways, railroads, canals, and pipelines. These methods provide data for earthwork planning and alignment of proposed routes. Profile leveling involves measuring elevations along a fixed line to create a vertical terrain profile. A surveyor sets up a leveling instrument at the benchmark (BM) and records a backsight (BS) to determine the...
1.5K
Design Example: Maintaining Level of an Embankment
381
Constructing a roadway embankment over uneven terrain requires precise leveling to ensure stability and proper drainage. Surveyors use a leveling instrument and staff to calculate ground elevations and determine the required fill material at each point along the embankment alignment.The process begins by positioning a leveling instrument near a benchmark with a known elevation. A backsight reading establishes the instrument height, which serves as a reference for subsequent measurements. A...
381
Design Example: Analyzing Capacity Contours for Flood Risk Assessment
269
Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
269
Three-Dimensional Analysis of Strain
567
Three-dimensional strain analysis is crucial for understanding how materials deform under stress, particularly in elastic, homogeneous materials. This method employs principal stress axes to simplify complex stress states into more understandable forms. Subjected to stress, a small cubic element within a material either expands or contracts along these axes, transforming into a rectangular parallelepiped. This transformation effectively illustrates the material's deformation. The principal...
567
Dimensional Analysis
608
Dimensional analysis is a valuable technique in fluid mechanics for simplifying complex problems by reducing them into dimensionless groups. These groups capture the essential relationships between the variables involved, allowing researchers and engineers to analyze fluid flow without dealing with each variable individually. This approach reduces the number of independent variables, allowing for easier analysis and better understanding of physical phenomena.
In fluid mechanics, dimensional...
In fluid mechanics, dimensional...
608
Design Example: Alignment of a Road Line Using GIS
312
The alignment of a road line using Geographic Information Systems (GIS) is a critical process in civil engineering, combining advanced technology with practical decision-making. This methodology begins with the collection of geospatial data, including information on land cover, geomorphology, drainage patterns, slope, and contour details. Such data is typically acquired through satellite imagery and GIS tools, offering a comprehensive understanding of the terrain.Once the data is gathered, it...
312


