城市建筑地层岩土承载力预测仿真  

Simulation of Bearing Capacity Prediction of Stratum in Urban Building

作　　者：张一凡[1] 王磊[1] 

机构地区：[1]成都理工大学,四川成都610059

出　　处：《计算机仿真》2018年第2期450-454,共5页Computer Simulation

摘　　要：对城市建筑地层岩土承载力的预测,能够有效提高建筑施工安全系数,较少建筑地基沉降。对建筑地层岩土的承载力的预测,需要根据岩土上部采集到的响应波场,计算岩土剪切波速剖面,完成对地层岩土承载力的预测。传统方法获得地层岩土承载能力检算系数,通过对构件截面进行破坏实验,但忽略了计算岩土剪切剖面,导致预测精度偏低。提出地层岩土承载力预测方法。通过对加荷过程进行数值模拟,得到加载范围内的载荷-位移曲线,对试验数据进行回归分析,获得地层岩土土体构件载荷-位移曲线初始斜率。将时间域弹性全波形反演方法应用于建筑地层岩土承载力预测中,依据在该地层岩土上部采集到的响应波场,计算获得地层岩土剪切波速剖面,进而获得建筑地层岩土极限承载力值。实验结果表明,上述方法具有分辨率高、无损预测等优点,其预测结果能够客观反映地基质量。A prediction method for bearing capacity of stratum rock - soil is proposed. Load - displacement curve in range of load is derived by digital simulation for loading process, then, by regression analysis of experimental da- ta, the initial slope of the load - displacement curve of soil component is obtained. The time domain method of elastic full waveform inversion is applied to bearing capacity prediction of the rock - soil, and according to the response wave field collected on top of the rock - soil, the section of shear wave velocity is obtained. Thus, the value of ultimate bearing capacity of the rock - soil is obtained. Simulation results show that the method has advantage of high resolu- tion and lossless prediction, and the prediction results can reflect quality of stratum objectively.

关 键 词：城市建筑 地层岩土 承载力预测 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]