胶凝砂砾石坝的地质适应性试验研究

摘要

胶凝砂砾石坝是介于混凝土重力坝与堆石坝之间的新坝型。目前，胶凝砂砾石坝的建基面设计仍参照混凝土重力坝的建基面设计要求。针对胶凝砂砾石坝与混凝土重力坝结构的差异性，提出了胶凝砂砾石坝坝基的地质适应性问题。通过现场的弹性波试验与原位剪切试验，坝基的强度及抗滑稳定性可以满足设计要求，证明适当放宽胶凝砂砾石坝建基面要求，不仅技术上是可行的，而且可以减少工程量，节约资金，降低工程投资。%The cement-sand-gravel ( CSG) dam is a new type of dam between the concrete gravity dam and the rockfill dam.At present , design criteria for the foundation plane of the CSG dam is still the same as the concrete gravity dam . Considering the structural differences between the CSG dam and the concrete gravity dam , the geological adaptability of the CSG dam is discussed .In-situ elastic wave tests and shear tests show that the strength and anti-sliding stability of the CSG dam foundation meet the design requirements .Thus, it is technically feasible to appropriately decrease the require-ment on the CSG dam foundation plane , which could also reduce the engineering quantity and save the investment .