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本文介绍了T型触探的研究现状、测试原理及其技术优点。选取天津某沿海软土场地,进行了工程实践,与静力触探测试结果、十字板测试结果进行了对比。测试结果表明:T型触探测试曲线变化趋势与静力触探基本一致;数值与十字板峰值强度相当。当不排水抗剪强度小于40k Pa时,T型触探测试结果稍高于十字板峰值强度;当不排水抗剪强度大于40k Pa时,二者测试结果基本相同。T型触探不需要上覆压力修正,不需要经验参数,有精确解,能方便地得到软黏土不排水抗剪强度随深度的变化曲线,是一种较好的原位测试手段。
This article introduces the current research situation, test principle and technical advantages of T-type probing. Select a coastal soft soil site in Tianjin, conducted engineering practice, and static cone test results, cross plate test results were compared. The test results show that: the trend of the T-type touch probe test curve is basically the same as that of the static touch probe; the value is similar to the peak intensity of the crosstalk. When the undrained shear strength is less than 40kPa, the T-type detective test results are slightly higher than the peak value of the cross plate; when the undrained shear strength is greater than 40kPa, the test results are basically the same. T-type probe does not require overlying pressure correction, without experiential parameters, with exact solution, can easily get undisturbed shear strength of soft clay with depth curve, is a better in situ testing methods.