The design method and scheme of reinforcement, underground construction technology and monitoring, The evaluation of the strengthening effect and techno-economic benefits.
加固支护设计方法和方案，井下施工和矿压监测，支护加固效果和技术经济效益分析。
The design scheme of the corbel between the old column and the new beam in the strengthening projects is discussed in detail, and a simple and reliable scheme that USES the bracket is recommended.
通过对加固改造中旧柱新梁节点设计方案的详细讨论，推荐了新增牛腿这种简单可靠的方案。
Before and after the strengthening, nonlinear FEM analysis and on-site experiments were implemented, which verified the rationality of the strengthening scheme and the effect of the strengthening.
为了论证加固方案的合理性，验证加固效果，本文还进行了加固前后的非线性有限元对比计算分析和现场对比试验。
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