基于支护结构位移计算土压力的方法

目的为了计算支护结构在设计侧向位移或基坑开挖过程中实际侧向位移条件下支护结构上作用的土压力．方法根据土压力和位移关系的一般规律，将作用于基坑支护结构上的土压力和支护结构的侧向位移曲线用双曲线函数表示；仿照文克尔地基模型的部分假设，将支护结构两侧土体用非线性弹簧模拟．结果建立了基于支护结构侧向位移的土压力计算公式．结论算例表明，按该公式计算的土压力值与工程实测值符合较好，且公式简单实用．

A Method of Lateral Earth Pressure Calculation Consequent upon Displacement for Excavation

For calculation of earth pressure on condition that retaining structure,lateral displacement is within limiting values,and a formula for earth pressure consequent upon displacement of retaining structure is to be built.According to general characteristics of earth pressure variation,the relationship between the pressure and lateral displacement of support structure is expressed by a hyperbola,and the soil on both sides of retaining structure is simulated by nonlinear spring partly in imitation of Winkler Foundation model.The result shows that the formula for earth pressure according to lateral is placement is developed,and therefore we draw the conclusion that it is proved by the sample that the calculation results of presented formula well tally with field dates,and the formula is plain and practical.