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在进行核电站、大坝、大运动场及高层建筑群等重大工程的勘察时,为了解诸如液化、地基放大等现象对地基稳定性的潜在影响,需要测定地基的动力学参数。动力学参数的测量可以有许多方法,如现场力学试验,岩、土样的室内试验,声波及单孔地震测井、跨孔地震法等。但在勘探孔中进行的力学试验,有种种局限性。故单孔和跨孔地震法已成为重要手段,其中后者具有高分辩率与高精度。
When carrying out surveys on major projects such as nuclear power plants, dams, large stadiums, and high-rise buildings, in order to understand the potential impacts of phenomena such as liquefaction and ground expansion on foundation stability, it is necessary to determine the dynamic parameters of the foundation. The kinetic parameters can be measured by many methods, such as on-site mechanical tests, indoor tests of rock and soil samples, acoustic and single-hole seismic logs, and cross-hole seismic methods. However, the mechanical tests carried out in the exploration holes have various limitations. Therefore, the single-hole and cross-hole seismic methods have become important tools, of which the latter has high resolution and high accuracy.