岩土力学2009，Vol.30Issue(12)：3759-3764,6.
相邻基坑土条土压力计算方法探讨
Discussion on calculation method of earth pressure of earth-strip between neighbouring excavations
摘要
Abstract
The Problem of how to calculate the earth pressure for the earth-strip neighbouring excavations is run against frequently in excavation engineering practice; but there is no calculation method in the existing criterion of excavation for the moment. First, the retaining and protection forms between neighbouring excavations are classified and put together, the affirming principle of the width between two excavations is put forward; then, the superposition method on Coulomb's earth pressure theory is presented; and the calculation formulas of the active earth pressure coefficient and earth pressure are derived and presented for clay and non-clay under differrent gradients and ground load, and the idea of the critical width and the calculation formula of reducing coefficient of the earth pressure of the earth-strip are also presented. The total and distributing earth pressure of earth-strip for different soils, different gradients and ground load can be calculated simply by the superposition method, the idea of the critical width and the calculation formula of reducing coefficient of the earth pressure of the earth-strip. Finally, two engineering examples are given to show that the retaining and protection structures generated by the method and the formulas are safe and rational; the method and the formulas can be for reference by similar excavation engineering.关键词
相邻基坑/土条土压力/叠加法/临界宽度/折减系数Key words
neighbouring excavations/ earth pressure of earth-strip/ superposition method/ critical width/ reducing coefficient分类
建筑与水利引用本文复制引用
金亚兵,刘吉波..相邻基坑土条土压力计算方法探讨[J].岩土力学,2009,30(12):3759-3764,6.
