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在硬壳层较薄的软土地基上建造房屋,往往下卧层强度不能满足规范要求。本文采用极限平衡理论进行双层地基承载力的计算。按照土的力学性指标Φ,首先定出近似的滑移网络,然后分别求出由凝聚力c产生的承载力p_1和由土重产生的承载力p_2,从而得出极限承载力p_u=p_1+p_2。在设计中,保证足够的安全度定出允许承载力p_a,并采取适当的措施。对照工程实例,可见经济效益比较显著,能保证工程质量。
Building a house on a thin, soft ground with a hard shell often fails to meet the specification requirements for the underlying layer. In this paper, the limit equilibrium theory is used to calculate the bearing capacity of the double-layer foundation. According to the soil mechanics index Φ, an approximate slip network is first determined, then the bearing capacity p_1 produced by the cohesion c and the bearing capacity p_2 generated by the soil weight are determined respectively, and the ultimate bearing capacity p_u=p_1+p_2 is obtained. . In the design, ensure sufficient safety to set the allowable bearing capacity p_a and take appropriate measures. Compared with engineering examples, it can be seen that the economic benefits are significant and can guarantee the quality of the project.