Experimental study on the force performance of assembled independent foundation
In order to investigate the flexural performance of the assembled independent foundation of the substation,two foundations assembled by"shear key-prestressing tendons"were experimentally studied under simulated uniform loads.The force performance of foundations with bonded and unbonded prestressing tendons was mainly compared.The effects of uneven application of epoxy resin glue at joints and grouting defects of prestressing tendons on the flexural performance of foundations were analyzed.The results showed that the flexural stiffness and bearing capacity of bonded prestressing tendon foundations were substantially improved compared to unbonded prestressing tendon foundations.Uneven application of epoxy glue to the joints mainly affected the flexural stiffness of the specimen after cracking,and had little effect on the stiffness and bearing capacity at the time of damage.Inadequate grouting of prestressing tendons could lead to bond slippage between the prestressing tendons and concrete,reducing the flexural stiffness of the specimen after cracking.
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