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- Title
基于渗水性改善的级配碎石空隙结构参数分析.
- Authors
赵方冉; 齐波; 石广顺; 刘军生
- Abstract
In order to promote the construction of sponge cities, low-cost development in the construction of hardened ground facilities such as plazas not only makes full use of rainwater resources, but also helps to alleviate the pressure on urban drainage systems. However, in these facilities construction projects, the water seepage capacity of the gravel base layer or cushion layer not only directly determines the stability of the facility structure, but also affects its rainwater seepage capacity and self-filtration capacity. Therefore, in order to make the gravel pad layer to obtain sufficient water permeability, a good void distribution state for its internal void structure is required to achieve the desired water permeability and stability. In this paper, the influence of multi-stage composition to the porosity and stability of the debris accumulation structure was discussed by analyzing the void parameters of the stacked structure with different particle arrangements. The Hagenpoe's law and Darcy's law were used to explore the expression fragmentation. The sieving model of the void distribution of the rock pile structure was derived, and the calculation formula of the gap change between the upper and lower layers was derived. The analysis results show that in the graded gravel structure, the effective radius(r) of the single-hole seepage flow is proportional to the water permeability of the graded crushed stone, and the water permeability effective coefficient (λn+1) of the number of misaligned holes in the upper and lower layers per unit area is directly proportional to the water permeability (Q) of the graded crushed stone.
- Publication
Yellow River, 2020, Vol 42, Issue 1, p131
- ISSN
1000-1379
- Publication type
Article
- DOI
10.3969/j.issn.1000-1379.2020.01.025