-
摘要: 为了提高路基压实度检测的准确性, 提出了路基压实度自动检测的瑞雷波法。采用落锤法敲击地表产生瑞雷波, 分别通过检波器和地震仪采集和记录瑞雷波信号, 应用τ-p变换提取经过信息处理后的瑞雷波, 获取频散曲线, 利用瑞雷波反演横波速度的方法计算压实度, 分析了压实度分布剖面图信息, 对比了用瑞雷波法和灌砂法计算的路基压实度。计算结果表明: 两条压实度曲线几乎重叠, 最大绝对误差为-0.300%, 相对误差为0.308%, 说明用瑞雷波法检测路基压实度数据可靠, 可以用于控制冲击碾压施工。Abstract: In order to improve the compactness detecting accuracy of subgrade, Rayleigh wave method was put forward to detect the degree of compaction of subgrade.Rayleigh wave was brought by using dropping hammer, its signal was detected by using detector, and recorded by using earthquake instrument.Processed Rayleigh wave was extracted by using τ-p transform, and its dispersion curve was obtained.The shear velocity of subgrade was invertely computed according to Rayleigh wave, the degree of compaction was computed according to the velocity, its profile diagram was analyzed, and it was detected by using Rayleigh wave method and pouring sand method, and the detecting results were compared.Comparison result shows that the compactness curves almost lap, the maximal absolute error is-0.300%, the maximal relative error is 0.308%, which indicates that the detecting result is credible, and the method is feasible to control impact rolling construction.
-
图 7 不同冲击碾压遍数压实度对比
Figure 7. Compactness comparison of different impact rolling numbers
表 1 压实度检测结果对比
Table 1. Comparison of compactness detecting results
% 深度/m 压实度 误差分析 灌砂法 瑞雷波法 绝对误差 相对误差 -0.4 97.3 97.4 0.100 0.102 -0.6 97.2 97.2 0.000 0.000 -0.8 96.6 96.5 -0.100 0.103 -1.0 97.4 97.1 -0.300 0.308 -1.2 96.9 97.1 0.200 0.206 -1.4 95.9 96.1 0.200 0.208 -1.6 97.1 97.4 0.300 0.308 -1.8 96.5 96.4 -0.100 0.104 -2.0 98.0 97.8 -0.200 0.204 -2.2 97.9 97.9 0.000 0.000 
下载: 导出CSV
-
[1] 石刚, 支喜兰, 谢永利. 冲击压实与强夯加固地基效果分析[J]. 交通运输工程学报, 2006, 6(4): 52-53. doi: 10.3321/j.issn:1671-1637.2006.04.012Shi Gang, Zhi Xi-lan, Xie Yong-li. Effect analysis of percussive compaction and dynamic compaction on roadbed reinforcement[J]. Journal of Traffic and Transportation Engineering, 2006, 6(4): 52-53. (in Chinese) doi: 10.3321/j.issn:1671-1637.2006.04.012 [2] 景宏君, 张斌. 黄土地区公路路基冲击压实试验[J]. 长安大学学报: 自然科学版, 2004, 24(1): 25-29. https://www.cnki.com.cn/Article/CJFDTOTAL-XAGL200401007.htmJing Hong-jun, Zhang Bin. Experi ments of highway subgradei mpact compaction in loess region[J]. Journal of Chang'an University: Natural Science Edition, 2004, 24(1): 25-29. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-XAGL200401007.htm [3] 杨成林. 瑞雷波勘探[M]. 北京: 地质出版社, 1993. [4] 张建清. 浅层地震多波勘探新技术研究[J]. 工程勘察, 2001, 29(6): 65-68. https://www.cnki.com.cn/Article/CJFDTOTAL-GCKC200106019.htmZhang Jian-qing. Research on the new exploration technique of multiwave for shallow earthquake[J]. Geotechnical Investigation and Surveying, 2001, 29(6): 65-68. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-GCKC200106019.htm [5] 王飞荣. 利用瑞雷面波法测定软土地基强夯加固的效果[J]. 江西煤炭科技, 2002, 24(4): 22-23. doi: 10.3969/j.issn.1006-2572.2002.04.010Wang Fei-rong. Using Rayleigh wave to test the effect of soft-soil foundationin heavy compacting[J]. Jiangxi Coal Science and Technology, 2002, 24(4): 22-23. (in Chinese) doi: 10.3969/j.issn.1006-2572.2002.04.010 [6] 顾汉明, 宋先海, 刘江平, 等. 用瞬态瑞雷波反演横波速度评价高速公路压碾效果[J]. 地质科技情报, 2001, 20(2): 100-102. doi: 10.3969/j.issn.1000-7849.2001.02.023Gu Han-ming, Song Xian-hai, Liu Jiang-ping, et al. Evalution of the effect of compaction highway surface using shear velocity inversed by instantaneous Rayleigh wave[J]. Geo-logical Scince and Technology Information, 2001, 20(2): 100-102. (in Chinese) doi: 10.3969/j.issn.1000-7849.2001.02.023 [7] Xia J, Miller R D, Park C B. Multichannel analysis of surface waves to map bedrock[J]. The Leading Edge, 1999, 18(12): 1 392-1 396. [8] 王家映. 地球物理反演理论[M]. 武汉: 中国地质大学出版社, 1998. [9] 杨成林, 时福荣, 李从信, 等. 应用瑞雷波等方法对公路质量进行无损检测[J]. 物探与化探, 1996, 20(2): 104-115. https://www.cnki.com.cn/Article/CJFDTOTAL-WTYH602.003.htmYang Cheng-lin, Shi Fu-rong, Li Cong-xin, et al. The application of Rayleigh wave and some other methods to non-destructive inspection of highway quality[J]. Geophysical and Geochemical Exploration, 1996, 20(2): 104-115. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-WTYH602.003.htm [10] 徐仲达. 地震波理论[M]. 上海: 同济大学出版社, 1997. [11] 李修忠. 瞬态瑞雷波法在高速公路路基勘察中的应用[J]. 公路, 2005, 50(2): 135-138. https://www.cnki.com.cn/Article/CJFDTOTAL-GLGL20050200Z.htmLi Xiu-zhong. Method of transient Rayleigh wave applied in investigation of expressway roadbed[J]. Highway, 2005, 50(2): 135-138. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-GLGL20050200Z.htm [12] 张宜洛, 郑南翔, 顾炳其. 中粗粒土路基压实度快速测定方法[J]. 中国公路学报, 2006, 19(5): 29-33. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGGL200605006.htmZhang Yi-luo, Zheng Nan-xiang, Gu Bing-qi. Compactness rapid measurement method on middle coarse grained soil subgrade[J]. China Journal of Highway and Transport, 2006, 19(5): 29-33. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-ZGGL200605006.htm -
点击查看大图
图(7) / 表(1)
计量
- 文章访问数: 343
- HTML全文浏览量: 113
- PDF下载量: 760
- 被引次数: 0
