摘要
为解决厚度离散性较大的多土层地基沉降计算问题,首先采用概率分析的方法,通过推导不均匀厚度土层的沉降均值、方差和水平自相关距离,给出了计算不均匀厚度多土层地基沉降的概率模型,然后对采用数值模拟所得沉降数据进行统计分析,根据K-S检验得出地基沉降的最优分布模型,最后对数值模拟结果与理论推导结果进行对比。结果表明:为计算简便,水平相关距离值的求取应选用改进递推空间法,该值可为钻探点的间隔距离选取提供理论依据;通过直接概率分析法建立了沉降计算的概率模型,同时经K-S检验,沉降数据分布模型更符合对数正态分布;运用该沉降分布模型预测所得沉降值与数值模拟所得结果的统计值十分相近,证明了该模型的可靠性。
In order to solve the problem of uneven thickness of soil layer in the process of actual engineering settlement calculation,probability analysis method is used.By deducing the settlement mean value,variance and horizontal autocorrelation distance of the soil layer with uneven thickness,a probability model for calculating the settlement of multi-soil layer with uneven thickness is given.Then,the settlement data obtained by numerical simulation is statistically analyzed,and the optimal distribution model of foundation settlement is obtained according to K-S test.Finally,the numerical simulation results are compared with the theoretical derivation results.The results show that:In order to simplify the calculation,the improved recurrence space method should be used to obtain the horizontal correlation distance value,which can provide a theoretical basis for the selection of drilling point spacing distance.The probability model of settlement calculation is established by direct probability analysis method,and K-S test shows that the settlement data distribution model is more consistent with lognormal distribution.The settlement value predicted by the settlement distribution model is very close to the statistical value obtained by the numerical simulation,which proves the reliability of the model.
作者
杨婷婷
谢永利
张宏光
岳夏冰
郑维程
Yang Tingting;Xie Yongli;Zhang Hongguang;Yue Xiabing;Zheng Weicheng(Highway School,Chang'an University,Xi'an 710061,P.R.China)
出处
《地下空间与工程学报》
CSCD
北大核心
2023年第6期2004-2010,2027,共8页
Chinese Journal of Underground Space and Engineering
基金
陕西省自然科学基金资助项目(2020JQ-379)。
关键词
地基
沉降
土层厚度
概率
钻探间距
foundation
settlement
soil layer thickness
probability
drilling spacing
