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序言:在我国某些地区,公路、铁路、运河等大规模工程,包括许多构筑物,需要通过广大的黑棉土地段。大家知道,黑棉土含有蒙脱石和伊利石矿物,由于其高度膨胀与收缩特性而被当地的工程师们视为不可靠的土,这种填土在湿度变化下所引起的膨胀受到挡土结构约束时就产生很大的压力,并在一些地区造成了不少破坏。迄今还未得出过考虑到这种填土的膨胀压力对其土压力的影响的任何分析方法,而本文正是为了填补这个空白,文中考虑到在一个潜在破裂面上可能的膨胀压力分布情况并根据滑动体的平衡状态来确定土推力。在主动土压力的情况下,假定内破裂面为一个平面(库伦Coulomb法),而在被动土压力情况下则假定为一曲面(对数螺旋线法)。
Preface: In some areas of our country, large-scale projects such as roads, railways and canals, including many structures, need to pass through the vast black cotton land segment. As we all know, smoky soils contain montmorillonite and illite minerals, which are regarded as unreliable soil by local engineers due to their high expansion and contraction characteristics. The swelling caused by changes in humidity due to such fillings is affected by the retaining structure. Constraints create a lot of pressure and cause a lot of damage in some areas. So far, no analytical method has been developed to take into account the effect of such filling pressure on its earth pressure. This paper is to fill this gap. This paper considers the possible distribution of the expansion pressure on a potential rupture surface. The earth thrust is determined according to the equilibrium state of the sliding body. In the case of active earth pressure, the inner rupture plane is assumed to be a plane (Coulomb method), while in the case of passive earth pressure it is assumed to be a curved surface (logarithmic spiral method).