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在素垫层内铺设土工材料加筋后,筋土的界面摩擦作用使加筋垫层的模量提高、应力扩散范围增大,有效发挥下卧土层的承载力、减小地基沉降。通过土工带加筋现场原位试验垫层底的土压力分布测试与结果分析得出:加筋薄垫层(Z/B=0.2)地基垫层底土压力分布是不均匀的,应力集中于基础的边缘,基础中心下应力较小。加筋地基强度和变形与加筋参数有关,通过引入应力扩散系数,分析不同加筋参数下加筋地基的应力扩散能力,研究筋土界面摩擦作用的应力扩散加筋机理,结合工程实际提出太原地区应力设计扩散角取值范围,为加筋地基的设计提供理论依据。
After the geotextile is laid in the prime cushion, the interface friction between the reinforcement and the soil increases the modulus of the reinforced cushion, and the stress diffusion range increases, effectively bringing the bearing capacity of the bottom soil into play and reducing the settlement of the foundation. Through the test and analysis of the earth pressure distribution at the bottom of the geotextile-reinforced in-situ in-situ test cushion, it is concluded that the subsoil pressure distribution is not uniform in the reinforced cushion (Z / B = 0.2), and the stress is concentrated on the foundation The edge of the base under the stress is smaller. The strength and deformation of the reinforced foundation are related to the reinforcement parameters. The stress diffusion coefficient is introduced to analyze the stress diffusion ability of the reinforced foundation under different reinforcement parameters. The stress diffusion mechanism of the friction between the reinforcement and the soil surface is studied. Based on the engineering practice, Regional stress design diffusion angle range, to provide a theoretical basis for the design of reinforced foundation.