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岩溶发育条件下加筋土工格栅对路基变形的防治效果分析
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Abstract:
采用FLAC3D建立岩溶路基模型，分析了溶洞发育过程中路基的变形规律和采用加筋进行处治的作用与影响因素。结果表明：溶洞顶板和路基顶面竖向位移会随溶洞跨度的增加而增大，当溶洞跨度达到一定程度后路基会发生沉陷破坏；在路基内加筋土工格栅能有效减弱溶洞发育对路面沉降的影响，且在提高路基稳定性的同时使得路基具有了一定的沉陷预警能力；筋材宜布置在路基底部，增加加筋层数和减小加筋间距对控制溶洞发育引起的路面沉降有明显影响。
A karst roadbed model was established using FLAC3D, and the deformation law of the roadbed during the development of karst caves and the effect and influencing factors of reinforcement treatment were analyzed. The results show that the vertical displacement of the top plate of the karst cave and the top surface of the roadbed will increase with the increase of the karst cave span. When the karst cave span reaches a certain degree, the roadbed will undergo settlement and damage; Reinforcing geogrids inside the roadbed can effectively reduce the impact of karst cave development on road settlement, and improve the stability of the roadbed while giving it a certain degree of settlement warning ability; reinforcement materials should be arranged at the bottom of the roadbed, and increasing the number of reinforcement layers and reducing the spacing between reinforcements have a significant impact on controlling road settlement caused by karst cave development.
| [1] | 郭铭倍. 基于有限元数值分析的土工格栅加筋路堤优化设计研究[D]: [硕士学位论文]. 石河子: 石河子大学, 2020. |
| [2] | 沈立森, 杨广庆, 程和堂, 等. 高速公路路基加宽土工格栅加筋优化技术研究[J]. 岩土工程学报, 2013, 35(4): 789-793. |
| [3] | 钱劲松, 凌建明, 黄琴龙. 土工格栅加筋路堤的三维有限元分析[J]. 同济大学学报(自然科学版), 2003(12): 1421-1425. |
| [4] | 雷金昌. 土工格栅在道路改扩建工程中的应用研究[D]: [硕士学位论文]. 吉林: 东北电力大学, 2023. |
| [5] | 贾庆荣. 岩溶发育区路基稳定性及处治技术研究[D]: [硕士学位论文]. 西安: 长安大学, 2019. |
| [6] | 吴迪, 吴建建, 徐超, 等. 土工织物治理岩溶路基塌陷的模型试验研究[J/OL]. 岩土力学, 2020(S2): 1-11.
https://doi.org/10.16285/j.rsm.2019.1689, 2023-11-06. |
| [7] | 李晓. 土工织物治理覆盖型岩溶路基塌陷的锚固作用研究[D]: [硕士学位论文]. 桂林: 桂林电子科技大学, 2022. |
| [8] | 吴建建. 土工织物治理岩溶路基塌陷加筋机理研究[D]: [硕士学位论文]. 桂林: 桂林电子科技大学, 2021. |
| [9] | 贺炜, 李昆, 王芳洪. 防岩溶塌陷加筋垫层大比例模型试验及设计理论研究[J]. 岩石力学与工程学报, 2016, 35(5): 980-988. |
| [10] | 王芳洪. 多层土工加筋体防治岩溶路基潜在塌陷的理论与试验研究[D]: [硕士学位论文]. 长沙: 长沙理工大学, 2014. |
