论文部分内容阅读
用弹塑性断裂力学的观点解释冶勒水电站第三岩组水泥帷幕灌浆取得成功的机理，正确描述了在强团结、弱胶结的地层劈裂灌浆的三个力学效应──劈裂的浆刃效应、充填的扩张效应、挤密的回弹效应。基于地层厚度、裂纹长度与裂纹张开宽度之比甚大，提出了采用无限板宽的半无限裂纹的合理近似假定，从而为求解灌浆中的相关参量确定了较为合适的效学模型。对G·隆巴迪有关浆液的最大扩散放半径、最大灌入量和最大总的上抬力的理论计算公式提出了修正意见。
The mechanism of success of cement curtain grouting in the third rock mass of Yele Hydropower Station is explained from the point of view of elasto-plastic fracture mechanics, and the three mechanics effects of splitting grouting in the strongly united and weakly cemented formations are correctly described: the blade effect of splitting , Filling the expansion effect, crowded rebound effect. Based on the stratum thickness, the ratio of crack length to crack opening width is very large, a reasonable approximation assumption of semi-infinite crack with infinite plate width is proposed, and a suitable valid model is established for solving the relevant parameters in grouting. Amendments were made to G · Lombardi’s theoretical formula for the maximum spreading radii, the maximum influx and the maximum total lifting force of slurry.