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粮食问题事关国家安全与社会稳定。地下储粮可以提高储粮品质,减少粮食损耗,确保粮食安全,实现绿色储粮,故需研究新型地下储仓结构。桩围复合式地下仓是一种用支护结构与主体结构全面结合的新型地下结构形式,具有施工方便、经济、安全等特点。本文利用理正深基坑软件建立了支护桩与腰梁共同作用的三维计算模型,对比分析了地下仓直径、基坑开挖深度、桩直径和间距、腰梁间距等因素对结构受力和变形的影响,分析了影响支护桩与腰梁共同作用的因素,得知开挖深度对结构受力、变形影响显著;桩顶冠梁、腰梁做成封闭圆环能为各根桩提供弹性支撑,改变支护桩悬臂的受力条件,协调各桩之间的内力和变形;腰梁的截面、跨度、间距应重点分析。
The food issue is related to national security and social stability. Underground grain storage can improve grain storage quality, reduce food losses, ensure food security, and realize green grain storage. Therefore, it is necessary to study the structure of new underground storage warehouses. Composite pile shaft underground warehouse is a kind of support structure with the main structure of a comprehensive combination of new underground structure, with the construction of convenient, economical, safe and so on. In this paper, a three-dimensional calculation model of the interaction between supporting pile and waist beam is established by using the software of Lizheng deep foundation pit. Comparing the factors such as the diameter of underground storage, excavation depth of foundation pit, pile diameter and spacing, And the influence of deformation, the factors that affect the interaction between the supporting pile and the lumbar beam are analyzed, and it is found that the excavation depth has a significant effect on the stress and deformation of the structure. Provide elastic support, change the supporting condition of cantilever cantilever, and coordinate the internal forces and deformation between piles. The cross section, span and spacing of the lumbar beam should be analyzed emphatically.