输电线路岩石嵌固基础抗拔试验及数值模拟分析

为了研究全风化-强风化地区岩石嵌固基础抗拔性能及土体破坏模式,基于安徽省太湖县岩石嵌固基础抗拔性能现场试验,结合数值模拟对不同埋深、不同型式的岩石嵌固基础的抗拔性能进行分析。发现在基础埋深较浅时,坛子型和掏挖型基础抗拔性能及土体破坏模式大体相近;当基础埋深较深时,掏挖型基础抗拔性能明显优于坛子型。同时,对两种基础型式的经济效益进行比较分析,研究结果表明:掏挖型嵌固基础抗拔性能更优,同时具有更好的经济性和环保性,推荐在风化性较强的岩石地基输电线路工程中推广应用。

Uplift Tests and Numerical Simulation Analysis of TransmissionLine with Rock Embedded Foundation

In this study, we use numerical simulation to analyze the uplift performance and failure modes of two types of rock embedded foundations with different buried depths in strongly weathered areas. We performed uplift bearing capacity tests on rock embedded foundations in Taihu county, Anhui province. The results show that the uplift bearing behaviors and failure modes of jar-type and belled-piers foundations are similar when their buried depths are shallow. When the buried depth of the foundation is deep, however, the uplift bearing behavior of the belled-piers foundation is obviously better than that of the jar-type foundation. In addition, we compare and analyze the economic benefits of these two foundation types. Our research results show that the tensile strength, economy, and environmental protection afforded by belled piers are superior. Therefore, we recommend that belled-pier foundations be applied in transmission line projects with strongly weathered rock foundations.