考虑地下水影响的基坑边坡土钉墙支护效果研究  

Study on the Effect of Soil Nail Wall Support for Foundation Pit Slopes Considering the Effect of Groundwater

作　　者：王金伦 刘慧敏 樊晨光 WANG Jinlun;LIU Huimin;FAN Chenguang(MCC Wukan Engineering Technology Co.,Ltd.,Wuhan 430000,China)

机构地区：[1]中冶武勘工程技术有限公司,湖北武汉430000

出　　处：《河南科技》2024年第19期54-58,共5页Henan Science and Technology

摘　　要：【目的】为了验证基坑边坡支护方案的合理性,保证施工安全,以晋江某基坑边坡为例,研究分析其边坡支护效果。【方法】建立基坑边坡三维网格模型和地下水位模型,采用有限差分法计算地下水影响情况下,该基坑边坡未支护和土钉墙支护时天然工况和暴雨工况下的稳定性系数和位移量分布。【结果】计算结果表明,土钉墙支护下该边坡在天然工况和暴雨工况下的稳定性系数分别为2.85和2.60,与未支护情况下的2.35和1.51相比有了大幅提升,位移量也明显减少。【结论】土钉墙支护明显提升了边坡的整体稳定性,并且改变了基坑边坡的位移分布模式,降低了边坡的坍塌风险。研究成果对类似的基坑边坡稳定性分析和支护方案设计和验证具有一定的参考价值。[Purposes]In order to verify the reasonableness of the foundation pit slope support scheme and ensure the construction safety,taking a foundation pit slope in Jinjiang as an example,the slope sup⁃port effect is studied and analyzed.[Methods]The three-dimensional grid model of the foundation pit slope and the groundwater level model were established,and the stability coefficient and displacement distribution of the foundation pit slope under the influence of groundwater were simulated by finite differ⁃ence method under the natural and rainstorm conditions when the foundation pit slope was unsupported and supported by soil nail wall.[Findings]The results show that the stability coefficients of the slope un⁃der natural and rainstorm conditions with soil nail wall support are 2.85 and 2.6 respectively,which are greatly improved compared with 2.35 and 1.51 in the unsupported condition,and the displacements are also significantly reduced.[Conclusions]The soil nail wall support obviously improved the overall stabil⁃ity of the slope,and changed the displacement distribution pattern of the foundation pit slope,reducing the risk of slope collapse.This study has certain reference value for similar foundation pit slope stability analysis and support scheme design and verification.

关 键 词：基坑边坡 有限差分法 地下水位 坑底隆起 边坡位移 

分 类 号：TU53[建筑科学—建筑技术科学]