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针对多仓筒式结构施工阶段沉降控制较难的问题,对多仓筒式结构施工沉降阶段仓内外的土体压力对筒式结构沉降的影响进行理论分析。将筒式结构沉降分为仓内土体沉降和结构下部地基沉降两部分,并针对这两部分沉降分别建立了对应的理论计算模型:一个是仓内土体压力计算模型,应用该模型分析了多仓筒式结构施工阶段仓内土体压力的分布以及仓内土体的沉降;另一个是叠加链杆法地基沉降模型,应用该模型对不均匀受力地基沉降进行计算分析。研究结果表明:多仓筒式结构的沉降与仓内外土体压力的分布状况关系密切;在同一荷载工况下,理论模型的计算结果与数值模拟、模型试验结果比较吻合,证明所建立的多仓筒式结构沉降计算模型具有较高的计算精度,可以用来精确计算多仓筒式结构的沉降计算。研究结果为多仓筒式结构施工阶段的沉降控制提供了理论基础,并为多仓筒式结构的设计和施工提供了理论参考。
In order to solve the problem of settling control in the construction of multi-warehouse tube structure, the effect of soil pressure inside and outside the warehouse during the settlement stage of multi-warehouse tube structure on the settlement of the tubular structure is theoretically analyzed. The settlement of the cantilever structure is divided into two parts: the soil subsidence in the warehouse and the subsidence in the lower part of the structure, and the corresponding theoretical calculation models are established respectively for the settlement of the two parts: one is the soil pressure calculation model in the warehouse, The distribution of soil pressure and the settlement of soil mass in the warehouse during the construction of multi-warehouse tubular structure. The other is the settlement model of ground with superimposed chain bar method. The settlement of unevenly-stressed foundation is calculated by this model. The results show that the settlement of multi-warehouse tube structure is closely related to the distribution of soil pressure inside and outside the warehouse. Under the same load condition, the theoretical calculation results are in good agreement with the numerical simulation and model test results. The settlement calculation model of warehouse-cylinder structure has higher calculation precision and can be used to calculate settlement calculation of multi-warehouse tube structure accurately. The research results provide a theoretical basis for the settlement control of the multi-cartridge structure during construction and provide a theoretical reference for the design and construction of the multi-cartridge structure.