| 李康达,杨玉生,柳莹,赵剑明,王龙,齐吉琳.采砂改变级配砂砾料筑坝压实特性及碾压施工参数研究[J].中国水利水电科学研究院学报,2020,18(5):401-407 |
| 采砂改变级配砂砾料筑坝压实特性及碾压施工参数研究 |
| Study on compaction characteristics of dam construction and construction parameters of sand gravel with varying gradation due to sand mining |
| 投稿时间：2019-08-01 |
| DOI：10.13244/j.cnki.jiwhr.20200511 |
| 中文关键词: 扰动砂砾料 碾压试验 压实特性 碾压施工参数 |
| 英文关键词:disturbed gravel roller compaction test compaction properties rolling compaction parameters |
| 基金项目:国家重点研发计划课题（2017YFC0404905）；国家自然科学基金项目（51679264） |
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| 中文摘要: |
| 某水库规划砂砾料场由于人工采砂，导致砂砾料级配劣化、离散性大，原设计包线、开采条件和坝的填筑控制标准等均发生变化，为保证大坝的填筑质量，大坝设计填筑标准相对密度由75%提高到了80%。为了验证新填筑标准的合理性，并确定经济高效的碾压施工参数，本文通过天然含水和充分洒水条件下不同铺料厚度、不同碾压遍数下的现场碾压试验，系统研究了含水率、铺料厚度、碾压遍数和含砾量等因素对扰动砂砾料压实性能的影响，在此基础上结合新的填筑标准，探讨了碾压施工参数和施工工艺。 |
| 英文摘要: |
| Due to the disturbance of sand mining, the gradation of sand gravel material is deteriorated and the dispersion is large in the planned material field. The original design envelope, mining conditions and control standards of dam filling have changed. To ensure the quality of the dam filling,the relative density of the dam design filling standard is increased from 75% to 80%. To verify the rationality of the new filling standard and determine the cost-effective rolling construction parameters, the in-situ compaction tests combined with different paving thickness and different compacting times under the conditions of natural water and sufficient watering are investigated in this paper,and the influence of factors such as moisture content, paving thickness, times of compaction and gravel content on the compaction properties of sandy gravel with sand mining disturbance is systematically studied. On this basis, combined with new filling standards, the rolling construction parameters and construction technology are discussed. |
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