花岗岩岩块饱水状态对纵波波速测试结果的影响

在岩土工程勘察中,采用纵波波速测试评价岩石的物理力学性质时,常会遇到岩块纵波波速试验值小于岩体纵波波速的异常情况。通过对青岛地铁勘察资料和勘察过程的调查分析,以花岗岩为例,采用对比试验模拟勘察试验过程进行验证,发现岩块饱水状态的变化和岩块纵波波速测试规程不严谨是导致岩块纵波波速测试结果不准确的重要原因之一。结合发现,文中对提高花岗岩岩块纵波波速测试结果准确性提出了建议。

Effect of Water-saturated State on P-wave Velocity of GraniteRock Test Results

In geotechnical engineering investigation,when the P-wave velocity test is used to evaluate the physical and mechanical properties of rock,the abnormal situation that the P-wave velocity test value of rock is less than that of rock mass is often encountered.Based on the investigation and analysis of the survey data of Qingdao Metro,Taking granite for example,the comparative test is used to simulate the process of geotechnical engineering investigation and test,it is found that water-saturated state of rock and the imprecise test requirements for testing P-wave velocity of rockare the important reasons leading to the inaccurate results of P-wave velocity measurement of rock.Combined with the findings,some suggestions are put forward to improve the accuracy of granite P-wave velocity test results.