无锚撑桩排式支护护壁桩侧土压力计算方法

 根据被支护土体中的成拱作用, 将间隔布桩时护壁桩侧土压力分为直接土压力和间接土压力两部分。可用小主应力拱应力分析计算直接土压力, 用大主应力拱应力分析计算间接土压力。由此得出的桩侧土压力与经典土压力不同, 呈曲线分布, 经与实测比较, 能较好地反映工程实际情况。分析了计算误差和公式适用范围。

CALCULATING METHOD OF EARTH PRESSURE AGAINST RETAINING PILES OF PILE-ROW RETAINING STRUCTURE

On the basis of arching effect analysis, the earth pressure against the retaining pile of deep excavation can be divided into two parts: direct and indirect earth pressures. The direct earth pressure should be calculated by analysis of minor principal stress arch while the indirect earth pressure by analysis of major principal stress arch. The earth pressure calculated by arching rationale, which is curvilinear, is different from classical theory, and the proposed method it is properer by comparing to the measured data. The error of the calculation is checked and the application conditions of the equation is proposed.