天然砂砾料的级配特性及包线设计方法

朱晟; 沈凤生

doi:10.11779/CJGE201909019

天然砂砾料的级配特性及包线设计方法 English Version

朱晟^{1, 2},
沈凤生³

1. 河海大学水文水资源与水利水电工程科学国家重点实验室,江苏南京 210024;
2. 河海大学水利水电学院,江苏南京 210024;
3. 水利部水利水电规划设计总院,北京 100120

基金项目: 国家重点研发计划项目（2017YFC0404801,2017YFC0404805）

详细信息

作者简介:
朱晟(1965— ),男,博士,教授,博士生导师,主要从事土石坝等水工岩土与环境岩土方面的研究。 E-mail: szhu@hhu.edu.cn。

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出版历程
- 收稿日期: 2018-05-14
- 发布日期: 2019-09-24

Gradation characteristics and envelope curve design method for natural sandy gravel

ZHU Sheng^{1, 2},
SHEN Feng-sheng³

1. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210024, China;
2. Hydroelectric College, Hohai University, Nanjing 210024, China;
3. The General Institute of Water Conservancy and Hydropower Planning and Design of the Ministry of Water Resources, Beijing 100120, China

摘要

摘要: 依据料场勘探砂砾料粒径-质量百分数的级配曲线图,采用粒径外包法确定设计包线的方法,由于样本数量的限制,难以合理反映砂砾料的实际级配范围,导致部分满足工程要求的填筑级配被判定为不合格,影响大坝的填筑质量评定。为此,结合阿尔塔什等3座高坝工程的筑坝料,论证了Weibull模型反映砂砾料上凸型、S型或反S型以及分形模型级配特性的适应性,得到阿尔塔什、大石峡和大石门的料场砂砾料级配分别为S型和上凸型两种不同分布类型;首次提出采用粒径规一外包法,即利用最大粒径对级配规一化技术,确定砂砾料级配包线的方法,可以弥补由于现场勘探资料样本不足,导致设计包线不能客观反映料场级配分布规律的缺点。研究成果可直接用于砂砾料的级配设计,也可用于确定不同类型土体级配的包络线,具有较强的应用价值。
- 砂砾料 /
- 级配设计 /
- 粒径归一外包法 /
- Weibull模型 /
- 分形理论
Abstract: Due to the limitation of the number of samples, the particle-size envelope method for directly determining the sand-gravel design line according to the gradation curve of exploration stockyard is difficult to reasonably reflect the actual gradation range of the sand-gravel materials in the material field, resulting in some of the filling gradations being unqualified, so that it will affect the assessment of dam filling quality. For this reason, based on the construction materials of Aertash, Dashixia and Dashimen, the suitability of the Weibull model to reflect the convex, S-shaped, or inverted S-shaped gravel materials and the gradation characteristics of the fractal model is demonstrated. The gradation of gravel materials in the stockyard of the Aertash, Dashixia and Dashimen is divided into two different types: S-type and convex-type. For the first time, the method of using the maximal particle size to standardize the gradation to determine the grading of the material yard is proposed. It can make up for the shortcomings that the grading package cannot objectively reflect the gradation range of the yard due to insufficient exploration data. The research results can be directly used for the gradation design of gravel materials, and can also be used to determine the envelope of different types of soil gradations, which shows a strong application value.
- sandy gravel /
- gradation design /
- particle-size normalization envelope method /
- Weibull model /
- fractal theory

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参考文献(12)

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