天津地区吹填土真空预压压缩率预测及回归分析

Predication and regression analysis of vacuum preloading compression rate of reclaimed soil in Tianjin region

针对吹填土地基竖向变形压缩率难以准确预估的问题,依托大量天津地区大面积围海造陆地基处理工程,计算吹填及真空预压地基处理沉降监测数据,求得相应的吹填土压缩率。将此数据与原位土的体积加权平均分级及物理力学参数指标进行多元回归分析,得出了根据原位土疏浚土级及4个主要关联物理力学参数预测吹填土压缩率的数学模型公式,有效预测了天津地区吹填土真空预压的体积压缩率。

Because vertical deformation of reclaimed soil compression rate is difficult to accurately forecast,relying on a large number of large area in Tianjin region reclaimed land ground treatment engineering,we obtain corresponding reclaimed soil compression ratio by calculatiing settlement of vacuum preloading foundation treatment monitoring data.The soil compression ratio,the weighted average of the volume of the soil in situ and physical mechanical parameters are analyzed in multiple regression.The mathematical model formula for predicting the reclaimed soil compression rate formula according to the in-situ soil dredged soil level and four main associated physical mechanics parameters is obtained.The effective prediction of vacuum prepressure volume compression in Tianjin area is realized.