Addressing the issues of seepage prevention and stability in foundation pits within water-rich deep dense sand layers,bottom sealing techniques are commonly employed for water-sealing reinforcement.Taking the comprehensive transportation hub project at Beijing City Sub-Center Station as a case,the anti-seepage performance and deformation characteristics of the foundation pit before and after bottom sealing reinforcement are analyzed using finite element simulation results.Additionally,the impact of reinforcement thickness and confined water pressure on the effectiveness of bottom sealing reinforcement is explored through numerical simulation.The findings indicate that bottom sealing reinforcement significantly enhances the anti-seepage performance of the foundation pit,reducing basement uplift and the lateral deformation of the diaphragm wall.The variation in reinforcement thickness and confined water pressure markedly influences the effectiveness of bottom sealing reinforcement.As reinforcement thickness increases and confined water pressure decreases,the basement's seepage flow,uplift,and the lateral deformation of the diaphragm wall are significantly reduced.The outcomes provide technical guidance and a theoretical basis for similar projects.
关键词
富水地区/深大基坑/旋喷封底/数值模拟
Key words
water-rich area/deep large foundation pit/spiral jet grouting bottom sealing/numerical simulation
维普
万方数据