| 强夯振动加速度的量测及现场试验研究 |
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| 引用本文： | 李盼盼,王家鼎,谷天峰,刘亚明.强夯振动加速度的量测及现场试验研究[J].西北地震学报,2018,40(1):166-170. |
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| 作者姓名： | 李盼盼 王家鼎 谷天峰 刘亚明 |
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| 作者单位： | 西北大学地质学系/大陆动力学国家重点实验室; |
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| 基金项目： | 国家自然科学基金面上项目（41372269）；中国地质调查局地质调查项目（121201011000150022）；陕西省科技统筹创新工程计划课题（2012KTDZ03-02） |
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| 摘 要： | 结合延安新区强夯加固地基工程,进行强夯振动加速度测试现场试验。选取填方区场地,结合地形设计监测方案,以测试强夯波沿水平方向和斜坡的传播规律。在选定试验段的某级填方场地上布置多组加速度传感器,运用多个8通道24位高速采集卡记录强夯振动加速度在平面和斜坡的传播和衰减过程,探讨强夯振动波沿水平面和斜坡的传播规律以及能级对振动加速度的影响。结果表明:径向和竖向加速度值均随与夯点距离的增大而减小;在与夯击点距离相同处,强夯振动波沿水平方向传播的径向和竖向加速度值要大于沿斜坡方向;随着能级的增大,强夯产生的夯击波增强,在与夯击点相同距离处产生的径向和竖向加速度均明显增大。
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| 关 键 词： | 延安 强夯 振动加速度 |
| 收稿时间： | 2016/9/6 0:00:00 |
Measurement and Field Test Research on Vibration Acceleration of Dynamic Compaction |
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| LI Panpan,WANG Jiading,GU Tianfeng and LIU Yaming.Measurement and Field Test Research on Vibration Acceleration of Dynamic Compaction[J].Northwestern Seismological Journal,2018,40(1):166-170. |
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| Authors: | LI Panpan WANG Jiading GU Tianfeng and LIU Yaming |
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| Institution: | State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi''an 710069, Shaanxi, China,State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi''an 710069, Shaanxi, China,State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi''an 710069, Shaanxi, China and State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi''an 710069, Shaanxi, China |
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| Abstract: | As a kind of foundation treatment method, dynamic compaction can quickly improve the bearing capacity and compressive modulus of foundations, with characteristics such as short duration, good effect, and low cost. However, the huge vibration waves caused by dynamic compaction tend to affect the stability of surrounding buildings and slopes. Therefore, it is of great theoretical and practical significance to study the propagation law of dynamic compaction vibration waves. In this study, combined with the monitoring scheme of a terrain design used in a dynamic compaction foundation project in the Yan''an New Area, we selected a site in the filling area in order to conduct field tests on the vibration acceleration of dynamic compaction. Based on these field tests, the propagation law of dynamic compaction vibration waves along the horizontal and the slope directions, respectively, were analyzed, and the effect of the energy level on the vibration acceleration was discussed. The results show that both the radial and vertical acceleration values of the vibration waves decrease with the increase of distance from the tamping point. At the same distance from the tamping point, the vertical and radial acceleration values along the horizontal direction were greater to those along the direction of the ramp. With the increase of energy level, the dynamic compaction waves were enhanced, and then both the radial and vertical accelerations at the same distance from the tamping point increased significantly. |
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| Keywords: | Yan''an dynamic compaction vibration acceleration |
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