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前言如何全面了解已建水电站坝基的地质演变情况,一直是个重要而又棘手的问题。过去由于不能及时发现坝基中的薄弱部位和隐患,无法探明它们的分布范围和发育程度,难以及时地、有针对性地采取工程处理措施,因而往往导致这些不良地质因素的加剧,影响了坝基的完整性和稳定性,甚至危及大坝的安全。近年来,随着国外先进物探仪器和先进测试技术的引进,使这一问题的解决逐渐变为现实。我队于今年初使用由美、日进口的地震仪和测井
Preface How to fully understand the geological evolution of the dam foundation of the hydropower station has been an important and thorny issue. In the past, due to failure to detect weak spots and hidden dangers in the dam foundation in a timely manner, their distribution range and development level could not be ascertained and it was difficult to timely and pertinently take engineering measures. As a result, these unfavorable geological factors were exacerbated and affected dam foundation The integrity and stability, and even endanger the safety of the dam. In recent years, with the introduction of foreign advanced geophysical instruments and advanced testing techniques, the solution to this problem has gradually become a reality. My team used seismographs and logging imported by the United States and Japan earlier this year