| 饱和钙质砂爆炸密实动力特性试验研究 |
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| 引用本文： | 徐学勇,汪稔,胡明鉴,孟庆山.饱和钙质砂爆炸密实动力特性试验研究[J].岩土力学,2012,33(2):402-406. |
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| 作者姓名： | 徐学勇 汪稔 胡明鉴 孟庆山 |
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| 作者单位： | 1.中国水电顾问集团 华东勘测设计研究院，杭州 310014； 2.中国科学院武汉岩土力学研究所 岩土力学与工程国家重点实验室，武汉 430071 |
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| 基金项目： | 国家自然科学基金项目(No.41101519);国家科技支撑计划重点项目(No.2006BAB19803) |
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| 摘 要： | 开展饱和钙质砂爆炸密实动力特性试验研究，探索饱和钙质砂爆炸密实机制和密实效果，对钙质砂地层中进行的工程建设有重要的理论意义和工程实用价值。通过控制爆炸参数，测试不同参数作用时钙质砂爆炸前后声波特性和表面沉降规律，揭示饱和钙质砂爆炸密实动力特性。试验结果表明：钙质砂高孔隙比和颗粒破碎特性对爆炸密实效果有重要影响。爆炸密实作用后，在爆炸近区，钙质砂颗粒受到较强爆炸冲击作用，导致钙质砂颗粒破碎而形成破碎区和压缩区，压缩区随着时间的推移有松弛的趋势，钙质砂颗粒结构重新固结过程在爆炸后2 h内基本完成。
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| 关 键 词： | 钙质砂 爆炸密实 声波特性 沉降规律 |
| 收稿时间： | 2010-06-27 |
Experimental study of dynamic characteristics of saturated calcareous soil explosion compaction |
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| XU Xue-yong
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WANG Ren
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HU Ming-jian
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MENG Qing-shan.Experimental study of dynamic characteristics of saturated calcareous soil explosion compaction[J].Rock and Soil Mechanics,2012,33(2):402-406. |
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| Authors: | XU Xue-yong WANG Ren HU Ming-jian MENG Qing-shan |
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| Institution: | 1. HydroChina Huadong Engineering Corporation, Hangzhou 310014, China; 2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China |
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| Abstract: | Exploring saturated calcareous soil explosion compacting mechanism and effect through the experimental study have great theoretical and practical significance on engineering construction in calcareous soil area.First,longitudinal wave velocity and surface settlement are tested at different moments before and after explosion under different explosive parameters through indoor mini-explosive compacting experiment.And then,wave velocity characteristics and settlement rules are studied to reveal dynamic characteristics of saturated calcareous soil explosion compaction through analyzing and contrasting the test results.It is suggested that high void ratio and particle breakage characteristics of calcareous soil have great impact on compacting effect.After explosion,breakage and compression cavity are formed in the neighborhood of explosion because of calcareous soil particle breakage resulted from the heavy shock of explosion,compression cavity would relax along with time lapse,the explosion compaction process is completed within two hours. |
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| Keywords: | calcareous soil explosion compaction sonic wave characteristics settlement rules |
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