某矿石码头堆场矿石分级压载的地基沉降预测

Prediction of foundation settlement of a heap of ore-port under multi-stage loading during period of use

采用规范沉降计算法及太沙基一维固结理论,对某矿石码头堆场地基的沉降进行计算分析。基于沉降实测资料,采用反分析方法,确定了各土层的压缩模量和固结系数,并将反演得到的参数代入太沙基一维固结方程,对后续沉降进行预测,从而确定分级压载的下一级压载时间与压载量。与传统的沉降预测方法相比,由反演分析得到土层参数,对后续沉降进行预测的方法,其结果更加真实可靠,也更能反映实际土体的固结沉降机理。该方法可供今后其他类似工程的设计和施工参考。

The settlement of foundation in a heap of the ore-port is calculated by specification and one-dimensional consolidation theory. Based on settlement data measured in field, compressibility modulus and consolidation coefficient of soil layers are obtained by back analysis method. Post settlement is also calculated and predicted with the proved compressibility modulus and consolidation coefficient of soils, then the time and quantity of the next-stage loading is obtained. By contrast with traditional methods predicting settlement, the result is much more reliable, this method is good at reflecting mechanics of consolidation of soils. The method can provide references for design and construction of other such project.