Saline solution has considerable influence on the thermo-hydro-mechanical behavior of compacted bentonite. In this study, the effects of NaCl solution on the swelling deformation, oedometric compression, and thermal volume behavior of compacted Gaomiaozi bentonite were investigated. Results show that compressibility of the specimens decreases with increasing NaCl concentration of the presaturation solution. At an overconsolidation ratio OCR$=$1 with a vertical pressure ${\sigma }_{\mathrm{v}}=0.1$ MPa and at OCR$=$3 with ${\sigma }_{\mathrm{v}}=0.1$ MPa, the specimens exhibited contraction during heating below the transition temperature, followed by dilation. A larger vertical pressure led to a higher transition temperature (at which the thermal strain turns from contraction to dilation). However, the specimens exhibited only thermal dilation at OCR$=$10 with ${\sigma }_{\mathrm{v}}=0.1$ MPa and at OCR$=$2 with ${\sigma }_{\mathrm{v}}=0.5\mathrm{MPa}$. Additionally, for a given vertical pressure and presaturation solution, the specimens with a higher OCR exhibited a larger irreversible dilation after a thermal cycle. Moreover, the influence of the presaturation solution on the thermal volume change is non-monotonic. A dilute solution (NaCl solution of 0.1 mol/L) and high salinity solution (NaCl solution of 1.0 mol/L) markedly promote the thermal expansion. These experimental trends can be attributed to the fact that attenuation of the diffused double layer repulsion and electrostatic interaction as well as the reduction of the free water at high saline conditions harden the soil.

盐溶液对压实膨润土的热-水-机械行为有相当大的影响。本研究研究了氯化钠溶液对压实高庙子膨润土的溶胀变形，测压压缩和热容行为的影响。结果表明，样品的可压缩性随预饱和溶液中NaCl浓度的增加而降低。在超合并比率下，OCR$=$1垂直压力 ${\sigma }_{\mathrm{v}}=0。\mathrm{1个}$ MPa和OCR$=$3个 ${\sigma }_{\mathrm{v}}=0。\mathrm{1个}$ MPa，样品在低于转变温度的加热过程中表现出收缩，然后膨胀。较大的垂直压力导致较高的转变温度（在该温度下，热应变从收缩变为膨胀）。但是，样品在OCR处仅表现出热膨胀$=$10个 ${\sigma }_{\mathrm{v}}=0。\mathrm{1个}$ MPa和OCR$=$2个 ${\sigma }_{\mathrm{v}}=0。5\mathrm{兆帕}$。另外，对于给定的垂直压力和预饱和溶液，具有较高OCR的样品在热循环后表现出较大的不可逆膨胀。而且，预饱和溶液对体积变化的影响是非单调的。稀溶液（0.1 mol / L的NaCl溶液）和高盐度溶液（1.0 mol / L的NaCl溶液）显着促进了热膨胀。这些实验趋势可归因于以下事实：在高盐分条件下，扩散的双层排斥力和静电相互作用的衰减以及游离水的减少会使土壤变硬。