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分析了影响土压力值大小的因素,提出了非对称基坑在结构位移的影响下土压力的计算公式,用此公式计算某基坑的土压力,与现场监测数据对比分析,发现非对称基坑的土压力大小是基坑两侧土体位移的综合表现,位移近似等于支撑的变形,土压力略小于支撑的内力;在降水时,土压力值减小,有利于基坑的稳定;在降雨条件下,则相反。研究结果可为其他基坑安全施工设计提供借鉴。
The factors that affect the value of earth pressure are analyzed. The calculation formula of earth pressure under the influence of structure displacement is proposed. By using this formula, the earth pressure of a foundation pit is calculated and compared with the field monitoring data. It is found that the asymmetry The earth pressure of the pit is a comprehensive expression of soil displacement on both sides of the foundation pit. The displacement is approximately equal to the deformation of the support. The earth pressure is slightly less than the internal force of the support. When the water is falling, the earth pressure decreases, which is in favor of the stability of the foundation pit. Under the conditions of rainfall, on the contrary. The results of this study can provide references for other excavation safety design.