| 钙质砂室内载荷试验研究 |
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| 引用本文： | 王新志,汪稔,孟庆山,刘晓鹏.钙质砂室内载荷试验研究[J].岩土力学,2009,30(1):147-151. |
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| 作者姓名： | 王新志 汪稔 孟庆山 刘晓鹏 |
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| 作者单位： | 1.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试验室，武汉 430071； 2.中交水运规划设计院有限公司，北京 100007；3.中国矿业大学 力学与建筑学院，北京 100083 |
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| 基金项目： | 国家自然科学基金，国家科技支撑计划重点项目，中国科学院武汉岩土力学研究所知识创新工程领域前沿项目 |
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| 摘 要： | 为保护和开发海洋资源，在珊瑚礁上进行工程建设时必须要查明岛礁上钙质砂地基的承载力和变形特性。室内载荷试验的结果表明，相同密实度的钙质砂具有比石英砂大得多的承载力和变形模量，变形量则小得多；钙质砂的承载力随着相对密实度的增大而增大，破坏时的变形量显著减小；相同密实度下饱和钙质砂比干燥钙质砂的承载力和变形模量低很多。钙质砂地基中土压力随深度急剧衰减，荷载的有效影响深度为2～3倍基础宽度；随着荷载的增大，土压力从表层逐渐传递到更深的土层。
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| 关 键 词： | 钙质砂 珊瑚礁 承载力 变形模量 载荷试验 相对密实度 |
| 收稿时间： | 2008-04-07 |
Study of plate load test of calcareous sand |
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| WANG Xin-zhi,WANG Ren,MENG Qin-shan,LIU Xiao-peng.Study of plate load test of calcareous sand[J].Rock and Soil Mechanics,2009,30(1):147-151. |
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| Authors: | WANG Xin-zhi WANG Ren MENG Qin-shan LIU Xiao-peng |
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| Institution: | 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. China Communications Planning ＆ Design Institute for Water Transportation, Beijing 100007, China; 3.China University of Mining and Technology, Beijing 100083, China |
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| Abstract: | In order to protect and exploit ocean resources and carry out engineering constructions on coral reefs, it is essential to investigate the bearing capacity and deformation characteristic of calcareous sand on coral reefs. The results of plate load test show that bearing capacity and deformation modulus of calcareous sand are much bigger than silica sand, but deformation is much smaller. Bearing capacity increases and deformation decreases when failing down with the relative density increasing. Bearing capacity and deformation modulus of saturated calcareous sand is much smaller than dry calcareous sand. Soil pressure in calcareous sand ground decays rapidly with depth increasing. Load could spread to 2-3 times breadth of load-plate. Soil pressure spread from superficial to deeper layer with increasing load. |
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| Keywords: | calcareous sand coral reef bearing capacity deformation modulus plate load test relative compaction |
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