声波检测技术在水电站开挖坝基岩体评价中的应用

APPLYING ACOUSTIC DETECTION IN EVALUATING THE ROCK AT THE DAM FOUNDATION EXCAVATION

坝基开挖中,声波测试技术作为简易手段可快速评价岩体质量。以某水电站为例,结合现场勘查,通过声波测试,揭示岩体风化程度,爆破松弛带和岩体质量。结果表明,岩体随深度增加受风化影响渐小,深部岩体几乎不受风化影响,岩体质量较高;利用声波波速对不同深度岩体进行的等级分界,为工程施工和防护措施提供了依据。

Acoustic detection is a simple means to quickly evaluate the rock quality in excavating dam foundations. It was used, combined with field investigations, to reveal about rock weathering, explosion-loosened parts and rock quality in building a hydropower station. The results show that, the rock mass was influenced less by weathering as the depth increased, with deep rock of high quality due to not being affected. The classification of rock mass by acoustic velocity offered a basis for further constructions and protective measures.