在岩土工程核算、竣工验收中遇到的锚杆或锚索等深埋一维良导体长度检定时,利用良导体直接充电和旁侧平行成孔(检定孔)电场测量的方式可以精确测量并给出检定结果.理论解析计算和水槽物理模拟试验表明,这种检定方法的测量精度受杆-孔相对距离和平行度的影响小,检定结果受旁侧无关良导体干扰小；在一个检定孔中可以对周围多根检定对象进行长度检测.这种有效的物探检测方法可以推广应用到良导体长度的精确检定中.%In civil engineering project accounting and completion acceptance, the detection of the lengths of one-dimensional good conductors such as anchors and bolts is very important. The problem can be solved ultimately as the length can be accurately measured by utilizing the mise-a-la-masse method while the electric field distribution in a parallel hole (test hole) is tested at the flanking region. Theoretical analysis and physical simulation test in tank indicate that the relative distance between the bolt and the hole and the parallelism have tiny influence on the accuracy of the bolt length. The irrelevant good lateral conductor also only has slight interference on the result. Several bolts around the test hole can be measured simultaneously. This effective method for geophysical prospecting may be popularized to the exact length detection of the similar good conductors as reinforcement cage.
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