粗粒土静止侧压力系数估算方法研究

蒋明杰; 陆晓平; 朱俊高; 吉恩跃; 郭万里

doi:10.11779/CJGE2018S2016

粗粒土静止侧压力系数估算方法研究 English Version

蒋明杰^1,2,
陆晓平³,
朱俊高^1,2, ,,
吉恩跃^4,5,
郭万里^4,5

1. 河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京 210098;
2. 河海大学江苏省岩土工程技术工程研究中心,江苏南京 210098;
3. 江苏省秦淮河水利工程管理处,江苏南京 210022;
4. 南京水利科学研究院岩土工程研究所,江苏南京 210024;
5. 水利部土石坝破坏机理与防控技术重点实验室,江苏南京 210029

基金项目: 国家重点研发计划项目（2017YFC0404804）; 国家自然科学基金项目（51479052）; 江苏省研究生科研与实践创新计划项目（20141B1605313）

详细信息

作者简介:
蒋明杰(1990- ),男,博士研究生,主要从事土体基本性质等方面的研究。E-mail: 18751957312@163.com。

通讯作者:
朱俊高，E-mail：zhujungao@hhu.edu.cn

中图分类号: TU43
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出版历程
- 收稿日期: 2018-07-21
- 发布日期: 2018-10-29

Method for estimating at-rest lateral pressure coefficient of coarse-grained soils

1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China;
2. Jiangsu Research Center for Geotechnical Engineering Technology, Hohai University, Nanjing 210098, China;
3. Management Division of Qinhuai River Hydraulic Engineering of Jiangsu Province, Nanjing 210022, China;
4. Geotechnical Engineering Department, Nanjing Hydraulic Research Institute, Nanjing 210024, China;
5. Key Laboratory of Earth-Rock Dam Failure Mechanism and Safety Control Techniques, Ministry of Water Resources, Nanjing 210029, China

摘要

摘要: 静止侧压力系数K₀是土体基本的力学参数,进行粗颗粒土K₀系数的研究对土石坝及填方工程有重要的理论意义和应用价值。目前,适用于粗粒土K₀试验仪器及方法较少,因此准确可靠的K₀估算公式在实际土石坝工程中具有较强的应用性。为得到可靠的粗粒土K₀估算公式,利用大型K₀测试仪以及大型三轴仪,对某砂卵砾石料和堆石料同时进行了系列K₀试验以及CD三轴试验。基于各土料K₀试验结果,验证了笔者之前提出的粗粒土K₀与竖向应力的关系式。在此式基础上,结合三轴试验结果,总结了一个根据有效内摩擦角φ′预测任意固结状态以及应力状态下粗粒土K₀值的估算公式。最后,利用K₀试验结果验证了本文估算公式的准确性及适用性。
- 静止侧压力系数 /
- 粗粒土 /
- 估算公式 /
- 有效内摩擦角
Abstract: The at-rest earth pressure coefficient K₀ is a basic mechanical parameter of soils. So studying K₀ of coarse-grained soils is of important theoretical value and practical significance in geotechnical engineering. At present, there are few apparatuses and methods applicable for measuring K₀of coarse-grained soils. Therefore, an accurate and reliable empirical formula for K₀has a strong application in the actual earth-rockfill dams. For obtaining the reliable estimation formula for K₀of coarse-grained soils, a number of K₀ tests and CD triaxial tests for a sandy gravel and a rockfill are performed by using the specially large-size K₀ apparatus and large-size triaxial apparatus, respectively. Based on the results of K₀tests on all specimens, the relationship between K₀ and vertical stress σ’_vfor the coarse-grained soils proposed by the authors is verified. By combining the relationship and triaxial test results, an empirical formula is obtained, which can well describe the relationship between K₀and stress state under an arbitrary consolidation condition based on the effective angle of internal friction φ′. Finally, the proposed formula is verified by using K₀test data.
- at-rest lateral pressure coefficient /
- coarse-grained soil /
- empirical formula /
- effective internal friction angle

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参考文献(12)

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