文章摘要
党鹏飞,刘启方.新疆乌鲁木齐地区vS30经验估计研究[J].地震工程学报,2019,41(5):1324-1331. DANG Pengfei,LIU Qifang.Empirical Estimation of vS30 in Urumqi Area of Xinjiang[J].China Earthquake Engineering Journal,2019,41(5):1324-1331.
新疆乌鲁木齐地区vS30经验估计研究
Empirical Estimation of vS30 in Urumqi Area of Xinjiang
投稿时间:2018-06-26  
DOI:10.3969/j.issn.1000-0844.2019.05.1324
中文关键词: 新疆乌鲁木齐;克拉玛依市;vS30;土层剪切波速;钻孔资料
英文关键词: Urumqi in Xinjiang;Karamay city;vS30;shear wave velocity of soil;borehole data
基金项目:中国地震局工程力学研究所基本科研业务专项(2016A04);中国国家自然科学基金(51378479,51078337)
作者单位
党鹏飞 中国地震局工程力学研究所 中国地震局地震工程与工程振动重点实验室, 黑龙江 哈尔滨 150080 
刘启方 中国地震局工程力学研究所 中国地震局地震工程与工程振动重点实验室, 黑龙江 哈尔滨 150080 
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中文摘要:
      从新疆乌鲁木齐市2004—2015年得到的841个钻孔中选择深度达30 m以下且钻孔资料记录完整的有效钻孔123个,通过计算5~30 m范围内不同深度的等效剪切波速,分别利用线性拟合、二次拟合和三次拟合对各深度vSd)及其vS30进行拟合。通过对比发现,三个方程的拟合误差都随深度的增加而减少,且三次拟合方程的误差始终小于同深度的线性拟合和二次拟合方程,因此推荐使用三次拟合方程来估计新疆乌鲁木齐市钻孔的vS30值。同时将此结果和Boore的结果进行比较后发现,不同深度处的等效剪切波速vSd)和vS30具有地域差异性;Boore得到的结果在钻孔深度小于20 m时明显高估vS30值,拟合曲线偏离实际数据点较远,所以本文拟合结果更适用于新疆乌鲁木齐市。综合比较可知,三次拟合得到的研究结果可以为新疆乌鲁木齐市钻孔深度不足30 m的地区求解vS30值提供参考。最后,利用新疆克拉玛依市2004—2015年钻孔资料检验三个拟合公式对克拉玛依市的适用性,发现深度越接近30 m,误差越小;线性模型和二次模型相对来说比较可靠,平均误差接近于0,并且对深度大于10 m的钻孔有高估现象;三次模型相对来说误差比较大,并且几乎在所有深度都有低估现象。
英文摘要:
      In this study, 123 effective drilling holes in Urumqi, Xinjiang, were selected from 841 drilling holes obtained during 2004-2015. The boreholes were below 30 m and recorded well. Through the calculation of equivalent shear wave velocities at depths of 5-30 m, the regression equation coefficients were separately obtained by linear fitting, square fitting, and cubic fitting. By comparison, it was found that the fitting error of the three equations decreased with the increase of depth, and the error of the cubic term was always less than those of the linear equation and the square equation at the same depth. Therefore, in this paper, the cubic equation is suggested as an empirical formula to estimate the vS values of boreholes in Urumqi area. By comparing the results with the results of Boore, it is shown that the equivalent shear wave velocity vS(d) and vS30 at different depths have regional differences. The research results in this paper can provide references for solving the vS30 of boreholes with depths less than 30 m in Urumqi, Xinjiang. Finally, the applicability of the three fitting formulas to Karamay is tested using borehole data in Karamay from 2004 to 2015. It is found that the closer the depth is to 30 m, the smaller the error. Moreover, the linear model and the square model are relatively reliable, with an average error close to 0, and the boreholes at depths greater than 10 m are overestimated. The cubic model features a relatively large error and its results are almost underestimated at all depths.
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