天然气水合物被公认是解决当前能源危机的潜在新型能源而备受关注。含水合物的海底土体称为深海能源土。水合物在能源土中有不同的赋存形式(如填充型水合物和胶结型水合物等),由于胶结型水合物对整体强度的贡献比其他存在形式更大,尤其是饱和度较低的情况。针对于胶结型水合物的赋存形式进行研究,水合物作为胶结物质存在于土颗粒之间,胶结厚度会在一定范围内变化。为真实地反映此现象,通过对能源土试样的电镜扫描图片整理分析,获得水合物饱和度与粒间胶结厚度的函数关系。基于前期已经完成的不同粒间胶结厚度下胶结力学特性的试验研究成果,为探究胶结厚度变化对能源土体宏观力学特性的影响,建立了考虑水合物胶结厚度的能源土粒间胶结模型,并介绍此模型中相关胶结参数及其确定方法。 Gas hydrates are widely recognized as potential new sources of energy for the current energy crisis. Subsoil hydrate containing soil called deep-sea energy soil. Hydrates have different forms (such as filled hydrates and cemented hydrates) in energy soils. Since cemented hydrates contribute more to the overall strength than other forms of abundance, especially those with lower saturation Happening. According to the occurrence of cementitious hydrate, the hydrate exists as cementing material between the soil particles, and the cementing thickness will change within a certain range. In order to truly reflect this phenomenon, the hydration saturation as a function of grain-to-grain cementation thickness was obtained by scanning electron microscope images of energy-bearing soil samples. Based on the experimental results of cementing mechanics under different grain-cementing thicknesses which have been completed in the previous period, an energy-particle intergranular cementation model considering the thickness of hydrate cementation was established to explore the effect of cemented thickness variation on macroscopic mechanical properties of energy soils. The related cementing parameters in this model and its determination method are introduced.