Water drainage and pressure reduction structure applied to basement anti-floating

The drainage and pressure reduction structure comprises a foundation, a sewer is formed in the top of one side of the foundation, a protective net frame is installed at the position, close to an opening of the sewer, of the foundation, and a water drainage pipe penetrates through the middle, corresponding to the sewer, of the foundation. Drainage pipes are symmetrically communicated with the two sides, located in the sewer, of the drainage pipe, a guide rod penetrates through the top of the drainage pipe, a piston is fixed to the end, located in the drainage pipe, of the guide rod, the portion, between the piston and the top end of the drainage pipe, of the guide rod is sleeved with a spring, and a baffle is fixed to the top, close to the drainage pipe, of the guide rod. When the pressure of underground water rises, the piston is pushed to move upwards, the underground water is drained into a sewer through the drainage pipe, then accumulated water in the sewer is drained through the water pump, drainage and p