| 刘健,刘宇航,王涛,马朋刚,周洪福.基于皮尔逊系数的黄土隧道预留变形量预测[J].安徽建筑大学学报,2024,32(4):64-70 |
| 基于皮尔逊系数的黄土隧道预留变形量预测 |
| Prediction of Reserved Deformation in Loess Tunnel Based on Pearson Coefficient |
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| DOI： |
| 中文关键词: 黄土隧道 预留变形量 拱顶下沉 周边收敛 统计分析 皮尔逊相关系数 |
| 英文关键词: loess tunnel reserved deformation vault sinks peripheral convergence statistical analysis Pearson correlation coefficient |
| 基金项目:陕西省2020年重点研发计划项目（2020SF-428）；陕建机施集团科研项目（SJS2022-JK01） |
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| 中文摘要: |
| 预测预留变形量是黄土地区隧道安全建设的重要环节。整理分析不同黄土土质类型隧道的148个监测断面数据，得到黄土隧道预留变形量合理设计的建议值。结果表明：1）采用皮尔逊相关系数分析，发现土质类型与拱顶沉降的相关性最强，埋深最弱；2）在Ⅳ级围岩黄土隧道区段内，黏质黄土和粉质黄土的预留变形量可设置为 15cm以内，砂质黄土可设置为15 ~ 20 cm；3）在V级围岩黄土隧道区段内，土质为黏质黄土的隧道区段内预留变形量可设置为15 ~ 20 cm，粉质黄土可设置为15 cm以内，砂质黄土可设置为35 ~ 47.5 cm；4）含水率为11% ~ 23%时，拱顶累计沉降量的分布比例较高，且土质为砂质黄土时，拱顶沉降受含水率的影响大于黏质黄土和粉质黄土；5）在不同埋深条件下，预留变形量设置为16 cm时，保证率可达84.6%。 |
| 英文摘要: |
| Reserved deformation prediction is conducive to the tunnel construction safety in loess areas. By analyzing 148 monitoring section data of tunnels with different types of loess soil, recommendations for the reserved deformation in loess tunnels were obtained. The results showed that by using Pearson correlation coefficient analysis, the correlation between soil type and arch settlement was the strongest, and the burial depth the weakest. In the loess tunnel section of grade IV surrounding rock, the reserved deformation of clay loess and silty loess can be set to within 15 cm, while for sandy loess to 15 ~ 20 cm. In the grade V surrounding rock loess tunnel section, the reserved deformation with clay loess can be set to 15 ~ 20 cm, while with silt loess to within 15 cm and sandy loess to 35 ~47.5 cm. When the moisture content reached 11% ~ 23%, the distribution proportion of cumulative settlement on the arch crown was relatively high, and the arch crown settlement in sandy loess was more affected by the moisture content than that in clay loess and silty loess. Under different burial depth, the reserved deformation was set to 16 cm, and the guarantee rate (the ratio between the deformation amount smaller than the given measurement point and the total statistical measurement point) reached 84.6%. |
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