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垂直挡土墙,墙后土体表面水平,不产生侧向变形为最简单情况下的静止土压力;当墙背倾斜、填土表面倾斜,或两者兼而有之的复杂计算条件为实际状态下静止土压力;本文分析了墙后土体不产生线应变而仅有剪切应变的土压力,称之为准静止土压力。具体分析方法如下:根据单元体在侧压力作用下的应力圆、极点及应变计算,得出在线应变为零的条件下,表面倾斜的墙后填土体作用在斜墙上的准静止土压力计算式。所导出满足线应变为零的准静止土压力计算式是静止土压力计算的延伸,有理论意义及使用价值。
Vertical retaining wall, the level of soil surface behind the wall, does not produce lateral deformation of the earth pressure in the simplest case of static pressure; when the back of the wall tilt, fill the surface tilt, or both of the complex calculation conditions for the actual State earth pressure; This paper analyzes the wall soil does not produce line strain and only shear strain of earth pressure, called quasi-static earth pressure. The concrete analysis method is as follows: According to the calculation of the stress circle, pole and strain of the unit under the lateral pressure, the quasi-static earth pressure acting on the inclined wall under the condition of zero strain is obtained. Formula. The formula of quasi-static earth pressure derived from satisfying zero strain is an extension of static earth pressure calculation, which has theoretical significance and practical value.