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基于双曲线拟合法,推导出恒载下地基沉降速率与剩余沉降之间的关系式、剩余沉降与工后沉降之间的关系式,据此建立了等载预压沉降速率标准和工程实用的卸荷时间预报方法。公式表明,沉降速率与剩余沉降的平方呈正比,工后沉降占剩余沉降的比例不仅与地基固结速率有关,而且与路面设计年限和预压时间有关,但预压时间的影响很小,沉降速率标准是所控制的工后沉降的幂函数。工程实例表明,规范和地方经验沉降速率标准适用于桥头路堤,用于一般路堤和结构物与路堤连接处过于严格。
Based on the hyperbolic fitting method, the relationship between settlement rate and residual settlement under constant load and the relationship between residual settlement and post-construction settlement are deduced. Based on this, Unloading time forecasting method. The formula shows that the settlement rate is proportional to the square of the residual settlement, and the ratio of the post-construction settlement to the remaining settlement is not only related to the consolidation rate of the foundation, but also to the pavement design time and preloading time, but the influence of preloading time is small and the settlement The rate criterion is a controlled power factor of post-construction settlement. The engineering examples show that the norms and local empirical settlement rates apply to bridgehead embankments and are too strict for the connection of common embankments and structures with embankments.