本次工程采用下挖式消力池，为了便于施工，消力池底板做成等厚，为了降低护

In this project, the digging type stilling pool is used. For ease of construction, the bottom of the stilling tank is made of equal thickness. In order to reduce the penetration pressure at the bottom of the protection tank, vertical drainage holes can be set under the protection tank and laid at the bottom In the anti-filter layer, the drainage holes are located in the rear half of the horizontal bottom plate. The drainage holes have a diameter of 10cm and a spacing of 2.0m. The filter layer is 30cm thick and divided into three layers. From top to bottom, it is 10cm gravel, 10cm medium sand, and 10cm coarse sand. <br>The width of the first end of the stilling tank is 92.5m, and the diffusion angle of the stilling tank is set to 10 °. <br>See Figure 5-2 for the structural dimensions of the stilling tank.

This project uses under-digging force pool, in order to facilitate the construction, the bottom plate of the force-reducing pool is made of such thickness, in order to reduce the penetration pressure at the bottom of the guard, can be under the guard straight drainage hole, and in the bottom of the guard tan laid antifiltration layer, drainage hole in the second half of the horizontal bottom plate, drainage hole diameter of 10cm, spacing of 2.0m, plum-shaped arrangement. The antifiltration layer is 30cm thick and divided into three layers, from top to bottom is 10cm gravel, 10cm medium sand, 10cm coarse sand.<br>The first end width of the force pool is 92.5m, and the diffusion angle of the force pool is set to 10 degrees, and the end width of the force pool is 100.7m.<br>The force-pool construction dimensions are shown in Figure 5-2.

In this project, the undercut stilling basin is adopted. In order to facilitate the construction, the stilling basin bottom plate is made of equal thickness. In order to reduce the seepage pressure at the bottom of the apron, a vertical drainage hole can be set under the apron, and a reverse filter layer can be laid at the bottom of the apron. The drainage hole is set at the back half of the horizontal floor plate, with a diameter of 10cm and a spacing of 2.0m, arranged in a quincunx shape. The thickness of the inverted filter is 30cm, divided into three layers, from top to bottom are 10cm gravel, 10cm medium sand and 10cm coarse sand.<br>The width of the head end of the stilling basin is 92.5m, the diffusion angle of the stilling basin is set to 10 °, and the width of the end of the stilling basin is 100.7m.<br>See Figure 5-2 for the structural dimension of stilling basin.<br>