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真空堆载联合预压的快速发展,使得工程需要大大超过了理论发展,从而数值模拟成为指导实践的一个有效方法.对青岛某会展中心软基处理用FLAC3D进行数值模拟,通过对软基中沉降和孔压的对比分析,验证了数值模拟的可行性.利用数值模拟分析了堆载对深层水平位移的影响,同时分析了排水板打设深度及板端土层渗透性对沉降的影响.分析结果表明:堆载可以有效地缓解浅层土的水平位移;排水板打设深度控制在要处理的软弱土层底部以上1 m处为最佳;排水板打入渗透系数较大的土层时会影响真空预压的处理效果,此时可以通过堆载改善软基处理的结果.
The rapid development of the vacuum preloading combined with the preloading, making the project needs greatly exceeded the theoretical development, and thus numerical simulation has become an effective way to guide the practice.A numerical simulation of FLAC3D for soft foundation treatment of Qingdao Convention and Exhibition Center, And pore pressure were compared to verify the feasibility of numerical simulation.Using numerical simulation to analyze the influence of heap load on deep horizontal displacement, and analyze the effect of drainage plate laying depth and plate side soil permeability on settlement. The results show that: the pile-loading can effectively relieve the horizontal displacement of shallow soil; the depth control of the drainage board is the best 1 m above the bottom of the soft soil layer to be treated; when the drainage board penetrates into the soil layer with larger permeability coefficient Will affect the effect of vacuum preloading, this time can improve the results of soft foundation treatment by stacking.