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[1]戴俊,杨康,商学旋,等.黄土地层浅埋暗挖隧道松散围岩压力计算*[J].中国安全生产科学技术,2022,18(7):142-148.[doi:10.11731/j.issn.1673-193x.2022.07.021]
　DAI Jun,YANG Kang,SHANG Xuexuan,et al.Calculation of loose surrounding rock pressure of shallow-buried undercut tunnel in loess strata[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2022,18(7):142-148.[doi:10.11731/j.issn.1673-193x.2022.07.021]
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黄土地层浅埋暗挖隧道松散围岩压力计算*
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
18
期数:
2022年7期
页码:
142-148
栏目:
职业安全卫生管理与技术
出版日期:
2022-07-31

文章信息/Info

Title:
Calculation of loose surrounding rock pressure of shallow-buried undercut tunnel in loess strata
文章编号:
1673-193X(2022)-07-0142-07
作者:
戴俊; 杨康; 商学旋; 陈箐芮; 郑选荣; 叶万军
（1.西安科技大学 建筑与土木工程学院，陕西 西安 710054；
2.陕西建工集团股份有限公司，陕西 西安 710003）
Author(s):
DAI Jun;  YANG Kang;  SHANG Xuexuan;  CHEN Qingrui;  ZHENG Xuanrong;  YE Wanjun
(1.School of Architecture and Civil Engineering,Xi’an University of Science and Technology,Xi’an Shaanxi 710054,China;
2.Shaanxi Construction Engineering Group Co.,Ltd.,Xi’an Shaanxi 710003,China)
关键词:
黄土地层; 围岩压力; 极限平衡理论; 深浅埋划分界限
Keywords:
loess strata;  surrounding rock pressure;  limit equilibrium theory;  dividing limit of deep-buried and shallow-buried
分类号:
X947
DOI:
10.11731/j.issn.1673-193x.2022.07.021
文献标志码:
A
摘要:
为研究黄土地层浅埋暗挖隧道松散围岩压力特征,根据既有隧道施工现场裂缝扩展情况，假定隧道开挖后的土体存在破裂区，取一半破裂区土体进行静力极限平衡分析，考虑静止土压力、侧向土压力、隧道尺寸和土层参数对半结构的影响，推导出适用于黄土地层浅埋暗挖隧道的围岩压力解析式，确定该公式下的隧道深浅埋划分界限，并结合工程实例分析隧道埋深、静止土压力系数和侧压力系数对围岩压力的影响。研究结果表明：随隧道埋深增大，围岩压力存在峰值，围岩压力曲线呈先增大后减小的趋势；围岩压力随静止土压力系数和侧压力系数的增大而减小，但静止土压力系数对围岩压力的影响较大；将新方法得到的围岩压力值分别与现场实测值和既有理论围岩压力值进行对比，计算的垂直、侧向围岩压力值均大于实测值，且新方法的计算误差相对较小。
Abstract:
In order to study the pressure characteristics of loose surrounding rock of shallow-buried undercut tunnels in the loess strata,according to the crack expansion at the existing tunnel construction site,it was assumed that a fracture zone existed in the soil after the tunnel excavation,and half of the soil in the fractured zone was taken for static force limit equilibrium analysis.Considering the influence of static earth pressure,lateral earth pressure,tunnel dimensions and soil layer parameters on the semi-structure,the analytical equation of the surrounding rock pressure applicable to shallow-buried undercut tunnel in loess strata was derived.The dividing limits of deep-buried and shallow-buried tunnels under this formula were determined,and the influence of tunnel buried depth,coefficients of static earth pressure and lateral pressure on the surrounding rock pressure was analyzed combining with engineering example.The results showed that with the increase of tunnel buried depth,there was a peak of surrounding rock pressure,and the curve of surrounding rock pressure presented a trend of increasing first and then decreasing.The surrounding rock pressure decreased with the increase of coefficients of static earth pressure and lateral pressure,but the coefficient of static earth pressure had slightly greater effect on the surrounding rock pressure.The values of surrounding rock pressure obtained by the new method were compared with the field measured values and the existing theoretical values of surrounding rock pressure respectively,both the calculated values of vertical and lateral surrounding rock pressure were greater than the field measured values,and the new method had the relatively small calculation error.

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备注/Memo

备注/Memo:
收稿日期： 2021-09-15
*基金项目： 国家自然科学基金项目(42072319)
作者简介： 戴俊，博士，教授，主要研究方向为岩土爆破动力学、巷道支护技术、微波破岩、地下工程及防灾减灾工程。
通信作者： 杨康，硕士研究生，主要研究方向为地下工程及防灾减灾工程。
更新日期/Last Update: 2022-08-10