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本文采用预应力技术,在底板标高仅-7.31m的地下车库中实现了3层停车方案,并对有粘结预应力平板的设计理论、经济效益、施工工艺、锚固体系等作了可行性研究,进一步探讨了超长结构预应力损失和裂缝的控制问题,对有粘结与无粘结预应力进行了技术经济分析。
In this paper, a three-layer parking scheme is realized in the underground garage whose floor elevation is only -7.31m using prestressing technology. The feasibility of the design theory, economic benefits, construction technology and anchoring system of the bonded prestressed slab is also studied , Further discussed the control of the prestress loss and cracks in the ultra-long structure, and carried out the technical and economic analysis on the prestressed bonded and unbonded structures.