公路湿软地基就地固化及预应力管桩处治分析

Analysis of In-situ Curing of Wet and Soft Highway Foundation and Treatment of Prestressed Pipe Piles

为合理确定公路湿软地基加固处治方案,采用有限元软件建立模型进行计算分析。结合施工案例进行数值模拟分析,结果表明:随着桩间距的增加,地基沉降不断增大,在考虑经济性的情况下,建议桩间距选择为2.5m。随着固化深度的增大,地基沉降不断减小,经对比分析,建议固化深度选择为2m;固化层弹性模量达到50MPa以上时,可有效控制地基沉降,固化层强度对地基沉降的影响相对较小。

In order to determine the treatment scheme of wet and soft highway foundation reinforcement,the finite element software is used to establish the model for calculation and analysis.In combination with the numerical simulation analysis of the construction case,the results show that:with the increase of pile spacing,the foundation settlement continues to increase,and it is recommended that the pile spacing should be 2.5m under the consideration of economy.With the increase of the curing depth,the foundation settlement decreases continuously,and after comparative analysis,it is recommended that the curing depth should be 2m.When the elastic modulus of the cured layer reaches more than 50MPa,the foundation settlement can be effectively controlled,and the influence of the strength of the cured layer on the foundation settlement is relatively small.