| 旧路改建高速公路中地基强夯效应测试与工艺参数分析 |
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| 引用本文： | 吕国仁,崔新壮.旧路改建高速公路中地基强夯效应测试与工艺参数分析[J].岩土力学,2008,29(9):2542-2546. |
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| 作者姓名： | 吕国仁 崔新壮 |
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| 作者单位： | 山东大学,土建与水利学院,济南,250061 |
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| 基金项目： | 国家自然科学基金，山东省自然科学基金 |
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| 摘 要： | 旧路改建高速公路遇到的最主要的问题是地基的不均匀沉降。数值分析表明，对新的天然地基进行处理是解决这一问题的关键。强夯是加固地基的一种有效措施，为了对强夯工艺参数进行优化研究，对夯锤冲击地面过程中产生的动孔隙水压力、动土应力以及夯后超静孔隙水压力的消散过程进行了跟踪测试与分析。结果表明，对以风化料为主的地基，最大夯击数不宜超过4击，而且铺底夯完成2d后就可进行满夯。
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| 关 键 词： | 道路工程 旧路改建 强夯：动孔隙水压力 动土压力 |
| 收稿时间： | 2008-01-27 |
Measurement of dynamic compaction effect and analysis of technical parameters in reconstruction of old road to expressway |
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| L Guo-ren,CUI Xin-zhuang.Measurement of dynamic compaction effect and analysis of technical parameters in reconstruction of old road to expressway[J].Rock and Soil Mechanics,2008,29(9):2542-2546. |
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| Authors: | L Guo-ren CUI Xin-zhuang |
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| Institution: | School of Civil and Hydraulic Engineering, Shandong University, Jinan 250061, China |
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| Abstract: | Differential settlement of the subgrade is the main problem encoutered in the reconstruction of old road to expressway. Numerical analysis indicates that the treatment to new nature ground is the key to decreasing the differential settlement. Dynamic compaction is an effective method of improving ground. In order to optimize its construction parameters, dynamic pore water pressure and dynamic soil stress rising during the dynamic compaction; and the dissipation of excess pore water pressure are measured and analyzed. For weathered soil subgrade, test results show that the maximum tamping number shouldn’t exceed 4 and ironing tamping can be carried out just two days after the major tamping. |
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| Keywords: | road engineering old road reconstruction dynamic compaction dynamic pore water pressure dynamic soil stress |
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