Northern Thailand has experienced several earthquakes which led to soil liquefaction in the past few decades. Traditional methods of evaluating liquefaction potential involve standard penetration test (SPT) or cone penetration tests. This research augmented experimental results with numerical methods to evaluate the liquefaction potential of Mae Lao Sand in Chiang Rai province of northern Thailand. SPT and downhole seismic test data collected during a field investigation at the Mae Lao site were compared to a 1D site response model analysis of the site. A series of undrained monotonic and cyclic triaxial tests was conducted on Mae Lao Sand specimens with different initial void ratios and confining pressures. Cyclic triaxial test results with varying deviator stress amplitudes were used to draw liquefaction resistance curves. Results from numerical simulation of sand liquefaction were used to characterise the stress–strain-pore water pressure response of Mae Lao Sand. 1D site response analysis determined seismic responses with different geological and groundwater conditions. All put together, the results showed that pore water pressure ratio decreases with increasing sand stiffness, the thickness of a soil layer significantly increases its liquefaction potential, and in-situ conditions and groundwater depths have major influences on the liquefaction potential of sand layers.

在过去的几十年里，泰国北部经历了几次导致土壤液化的地震。评估液化潜力的传统方法包括标准渗透测试 (SPT) 或锥体渗透测试。这项研究通过数值方法增强了实验结果，以评估泰国北部清莱省湄老挝沙的液化潜力。在 Mae Lao 现场调查期间收集的 SPT 和井下地震测试数据与现场的 1D 现场响应模型分析进行了比较。对具有不同初始孔隙比和围压的湄劳砂试件进行了一系列不排水单调和循环三轴试验。具有不同偏应力幅的循环三轴试验结果用于绘制液化阻力曲线。沙子液化的数值模拟结果被用来表征湄劳沙子的应力-应变-孔隙水压力响应。一维场地响应分析确定了不同地质和地下水条件下的地震响应。综上所述，结果表明，孔隙水压力比随着砂层刚度的增加而减小，土层厚度显着增加其液化潜力，原位条件和地下水深度对砂层的液化潜力有重大影响。