Abstract: This paper briefly describes swelling displacements of foundation rock adjacent to high dam, dam foundation displacements toward upstream and “convergency” displacements of rock mass between banks toward, river bed, so as to know the corresponding dam stress stale conveniently and , to lay out rationally the prototype observaton instuments of the dam.

摘要： 本文简述了高混凝土坝附近基岩的抬升变位、坝基向上游的变位以及峡谷两岸岩体向有床方向的收敛变位，以有助于更全面地了解大坝所处的应力状态、更合理地布置大坝的原型观测仪器。