葛洲坝二、三江建筑物的地基为粘土质粉砂岩、砂岩和砾岩互层组成,其中夹有多层粘土岩类软弱夹层,有的软弱夹层已经泥化。所以二、三江工程的安全监测重点是建筑物及其地基的稳定性。监测内容主要是:(1)建筑物的水平和竖向变形;(2)地基扬压力、渗流量和渗漏水流的水质变化;(3)地基软弱 The foundation of Gezhouba II and Sanjiang buildings is composed of interbedded clayey siltstone, sandstone and conglomerate with multiple layers of clay rock weak sandwiches, some of which are muddy. Therefore, the safety monitoring of the Second and Third Rivers projects focuses on the stability of buildings and their foundations. Monitoring mainly includes: (1) horizontal and vertical deformation of buildings; (2) variation of water quality of ground pressure, seepage volume and seepage water flow; (3) weak foundation