含有隐伏柱状空洞的轨道路基地层空间应力分布理论分析  

Theoretical Analysis on the Characteristics of Spatial Stress Components Distribution of the Track Subgrade Strata with Hidden Columnar Cavity

作　　者：刘海鹏 陈文韬 黄威 李昭捷 李想 谢朋 董金爽 林澍 耿希鹏 LIU Hai-peng;CHEN Wen-tao;HUANG Wei;LI Zhao-jie;LI Xiang;XIE Peng;DONG Jin-shuang;LIN Shu;GENG Xi-peng(Hainan Agricultural Reclamation Construction Group Co.,Ltd.,Haikou 570226;The First Construction Company of CCCC Second Harbor Engineering Co.,Ltd.,Wuhan 430416;School of Civil Engineering and Architecture,Hainan University,Haikou 570228)

机构地区：[1]海南省农垦建工集团有限公司,海口570226 [2]中交二航局第一工程有限公司,武汉430416 [3]海南大学土木建筑工程学院,海口570228

出　　处：《广州建筑》2025年第3期23-27,共5页GUANGZHOU ARCHITECTURE

基　　金：国家自然科学基金(42002293);海南省自然科学基金(520QN229、422RC599);海南大学2022年度教育教学改革研究项目(hdjy2243)。

摘　　要：在城市化建设的大背景下,轨道建设蓬勃发展。在工程施工和使用过程中,由于隐伏空洞的存在,地面塌陷灾害屡有发生。因此,明晰在多因素耦合作用下路基地层的应力分布特征,对于确保地面稳定尤为重要。由此,本文开展含有隐伏柱状空洞的轨道路基地层空间应力分布理论分析。首先,综合考虑路基自重及车辆均布荷载的影响,建立空间计算模型。然后,应用弹性力学基本理论,求得各应力分量的数学表达式。同一工况下数值模拟结果和解析解计算结果对比分析显示,竖向应力的吻合度较高,径向应力和环向应力存在一定的误差,但最大误差均小于5%。并且,这种误差随着半径的增大具有逐渐减小的趋势,当距离达到3倍直径后误差基本消失。所求得的理论解具有结果准确、计算量小的优点,为地面稳定性量化评价指标的推定和易发性评价模型的构建提供了有力支撑。In recent years,the development of urbanization is rapid,and ground collapse happened frequently.During the construction and use of engineering projects,ground collapse disasters frequently occur due to the presence of hidden cavities.Therefore,clarifying the stress distribution characteristics of the subgrade layer under the coupling of multiple factors is particularly important for ensuring ground stability.Therefore,this article conducts a theoretical analysis of the spatial stress distribution in the base layer of a railway track containing concealed columnar voids.Firstly,considering the unit gravity of the subgrade and vehicle,a spatial model was generated.Subsequently,the expressions of stress components were obtained using the theory of elasticity.The numerical simulation result of vertical stress is in good agreement with the theoretical calculation result.There are some errors in value for the radial and circumferential stress.However,the maximum error is less than 5%.Moreover,this error gradually decreases with the increase of radius,and disappears when the distance reaches three times the diameter.The present analysis indicates that the solved general solution could reflect the distribution of stress accurately,and is feasible to practical application.

关 键 词：轨道路基 柱形空洞 空间轴对称模型 应力分布特征 解析解 

分 类 号：TU443[建筑科学—岩土工程]