【摘要】 深部软岩体应力测试难度大,尚无有效测试技术。对此,研制了一种适用于软岩体应力测试的三向压应力传感器,提出了相应的解算方法,并对传感器进行了标定试验、干扰试验和室内模型试验。标定试验结果表明,传感器的线性度、重复性等静态性能良好。当荷载不断增大时,传感器的测量误差先逐渐减小,直至为0,而后又逐渐增大,但误差基本上都在10%以内,说明传感器能较精确地测量量程范围内的应力大小。干扰试验结果表明,传感器3个传感面之间的相互干扰可以忽略不计。模型试验结果表明,随着加载次数的增加,传感器所感知的力越来越接近所施加的力,最后趋近于相等,进一步表明了该传感器基本满足工程实践要求。此外,初步探讨了传感器的优化设计方向等问题。更多还原

【Abstract】 The stress measurement of deep soft rock mass is very hard; and the existing testing technique is not available. Thus, a 3D compressive sensor is particularly invented to measure the geostress of soft rock mass; the corresponding method of calculation is introduced; the calibration test, interference test and laboratory model experiment for the sensor are also performed. The calibration test data show that the static properties, such as linearity, repeatability, etc., are well. As the load increases gradually, the measuring error of sensor is diminishing, until zero, and then increasing, but less than 10% as a whole; so a conclusion is obtained that the stress within a reasonable range can be perceived accurately. The interference test shows that the mutual disturbance of three perception surfaces is negligible. The laboratory model experiment data show that, when forcing repeatedly, the value detected by the sensor approach to the load application more and more, almost equal finally, and further summing-up is gained that the 3D compressive sensor basically meet engineering practice requirements. In addition, the optimization design of the sensor is discussed preliminarily.更多还原