建筑在软基或破碎岩基上的水电站,其尾水管往往做成箱形结构,底板和墙墩连成整体,如图1所示。作用在尾水管上的荷载有:结构自重、上都结构及设备传来的重量、内水压力、外侧水压力、扬压力和地基反力。作用在底板上的地基反力与扬压力之和应等于上都荷载之和。地基反力顺水流方向 The construction of a hydropower station on a soft foundation or broken rock foundation, the tail pipe is often made of box-shaped structure, floor and wall pier into a whole, as shown in Figure 1. The loads acting on the draft tube are the self-weight of the structure, the weight of the structures and equipment, the internal water pressure, the external water pressure, the upward pressure and the foundation reaction force. The sum of the reaction force on the foundation and the boost pressure acting on the floor should be equal to the sum of the load on the floor. Foundation anti-cis-flow direction