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原文用土的侧向膨胀等于拉杆伸长的变形协调条件建立对拉式挡土墙的弹性土压力算式,作了有益的探讨。笔者认为还有以下几个问題值得讨论。 (一) 土压力理论不是建立在弹性理论上的,实际上土是松散介质。弹性侧压力随着侧向膨胀增大而减少,直至等于0(原文式(3)的p_6.可以等于0)。因此,如果把拉杆的材料换成比钢更富有弹性的材料,拉杆所受的力可以降到很小。按原文看法,侧向变形到达一定程度时,弹性侧压力转化为主动土压力,破坏即将发生。于是出现了这样的问题,土在弹性
The lateral expansion of the original textual soil is equal to the deformation coordination condition of the extension of the tension rod, and the elastic soil pressure equation of the pull-type retaining wall is established and usefully discussed. The author believes that the following issues are worth discussing. (1) Earth pressure theory is not based on elastic theory. In fact, soil is a loose medium. The elastic side pressure decreases as the lateral expansion increases, until it equals 0 (p_6 of the original formula (3) can be equal to 0). Therefore, if the material of the tie rod is replaced with a material that is more elastic than steel, the force on the tie rod can be reduced to a very small value. According to the original view, when the lateral deformation reaches a certain degree, the elastic lateral pressure is converted into active earth pressure and the damage is about to occur. So the question arises that the soil is elastic