基于分层综合估算法的粉煤灰回填地基承载力研究

Research on bearing capacity of fly ash backfill foundation based on layered comprehensive estimation method

建筑物地基受到地下水等作用影响会出现沉降、变形,严重影响建筑结构安全,因此提出建筑物粉煤灰回填地基承载力特征值估算方法。使用分层综合法计算该地基地下水位对地基的压力,获得地基承载力值。通过计算确定地基荷载力系数,结合该系数与地基承载力值,考虑相关技术规范估算地基承载力特征值,并基于岩土围压效应进一步修正地基承载力特征值。经过试验分析发现,使用该估算方法能够计算出较为准确的地基承载力值,通过该数值能够估算出研究区域各个检测点的承载力特征值,且计算结果与仪器测量的实际结果较为接近。

The settlement and deformation of the building foundation will occur under the influence of groundwater and other effects,which will seriously affect the safety of the building structure,so the estimation method of the characteristic value of the bearing capacity of the building fly ash backfill foundation was proposed.The layered synthesis method was used to calculate the pressure of the groundwater level on the foundation,and the bearing capacity value of the foundation was obtained.The bearing capacity coefficient of the foundation was determined by calculation,combined with the bearing capacity value of the foundation,the characteristic value of the bearing capacity of the foundation was estimated by considering the relevant technical specifications,and the characteristic value of the bearing capacity of the foundation was further modified based on the confining pressure effect of rock and soil.Through experimental analysis,it was found that using this estimation method could calculate relatively accurate foundation bearing capacity values,and the bearing capacity characteristic values of each detection point in the study area could be estimated through this value,and the calculation results were relatively close to the actual results of instrument measurement.