自然平衡拱 meaning in Chinese

natural arch
natural self-supporting arch

This article analyses the reinforcement mechanism of pile - net composite foundation mainly , combining natural equilibrium arch theory and reinforced cushion tension membrane theory to deduce the calculation formula of the stress ratio of pile - soil in the pile - net composite foundation under embankment
本文主要对桩网复合地基的加固机理进行分析，并结合自然平衡拱理论和加筋垫层拉膜效应理论推导出路堤下桩网复合地基桩土应力比计算公式，同时分析了各设计参数变化对桩土应力比的变化规律。