In-hole shear wave source and method for testing wave speed by using cross-hole method

• Main Authors: LI YULIANG, CHEN XIAOFENG, TIAN YONGJIE, SU TIEJUN, HU SHENGBO
• Format: Patent
• Language: Chinese; English
• Published: 02.03.2018
• Subjects: DETECTING MASSES OR OBJECTS; GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; MEASURING; PHYSICS; TESTING

The invention relates to an in-hole shear wave source and a method for testing the wave speed by using a cross-hole method. The in-hole shear wave source includes a guide cylinder, a weight, a hammerpad and a trigger. Stopping devices are arranged in the guide cylinder and on the weight. An anti-rotation steel wire rope is arranged at the top of the weight. The method comprises the steps of constructing a receiving hole and an exciting hole, tightly contacting the hammer pad with the bottom of the exciting hole, and calculating the propagation speed of the shear wave. The trigger is installedon the top of the weight and ensures accurate triggering time. The test method is good in adaptability, can be used for drilling rock or soil texture. Large shock excitation energy, strong effectivesignals, and far effective propagation distance of the shear wave are achieved. 本发明涉及种孔内剪切波震源及跨孔法波速测试方法，孔内剪切波震源包括导向筒、重锤、锤垫以及触发器；在导向筒内和重锤上设置限位装置，在重锤顶端设置防旋转钢丝绳；本发明方法采用施工接收孔和激发孔、锤垫与激发孔孔底紧密接触和计算出剪切波的传播速度的步骤；本发明触发器安装在重锤顶端，保证触发时间的准确；