重型吊装场地换填垫层变形计算分析

以青岛市某软弱地基为背景,通过现场试验和ABAQUS数值模拟相结合的方法,探讨重型吊装场地换填垫层后持力层变形计算问题。采用内插法对沉降计算经验系数进行修正以及反演瞬时沉降的地基弹性模量,并将修正的沉降结果和反演值与数值模拟结果进行比对,研究内插法优化程度及反演弹性模量的实用性。结果表明,内插法修正分层总和法中的沉降计算经验系数能使计算的沉降结果更加接近数值模拟结果,将反演的弹性模量在数值模拟中进行赋值,使模拟结果与静载试验结果相吻合,二者均能达到优化变形计算的目的。在重型吊装场地换填垫层的持力层变形计算中采用以上两种方法具有较强的实用性。研究结果可为类似地层的地基处理和吊装工程提供参考。

Calculation analysis on the deformation of a heavy lifting site replacement bedding

In the background of a soft foundation in Qingdao, the calculation of the deformation in the bearing layer after the replacement of bedding at a heavy lifting site was investigated by a combination of field tests and ABAQUS numerical simulations. The interpolation method is used to correct the empirical coefficients of settlement calculation as well as to invert the modulus of foundation elasticity for transient settlement. The corrected settlement results and the inverse values are compared with the numerical simulation results to study the degree of optimization and practicality for the inverse modulus of elasticity of the interpolation method. The results show that the interpolation method can modify the empirical coefficients of settlement calculation in the layered sum method to make the calculated settlement results more similar to the numerical simulation results, and the inverse elastic modulus is assigned in the numerical simulation to make the simulation results match with the static load test results, both of which can achieve the purpose of optimizing the deformation calculation. The above two methods have strong practicality in the calculation of the deformation of the bearing layer of the replacement bedding at heavy lifting sites. The research results can provide reference for foundation treatment and lifting projects of similar foundations.