摘要
以西南地区某公路项目互通现浇梁工程为例,验算现浇混凝土满堂支架的基础承载力,并结合数值模拟对不同密实度碎石回填土加固基础变形特征进行研究。结果表明:考虑安全系数后,地基承载力容许值不满足要求;随着荷载的增加,20%和40%密实度碎石回填土率先达到极限承载力,并发生剪切破坏;确定60%密实度作为加固回填碎石土的标准,可有效保障工程安全。
Taking the cast-in-place beam project of the highway at a certain Interchange in the southwest region as an example,the foundation bearing capacity of cast-in-place concrete full framing was checked,and the deformation characteristics of foundation reinforced by gravel backfill soil with different density were studied by numerical simulation.The result shows that,the allowable value of foundation bearing capacity does not meet the requirements after considering the safety factor.With the increase of load,20%and 40%density gravel backfill soil has reached the ultimate bearing capacity first,and shear failure occurs.60%density is determined as the standard for reinforcing backfill gravel soil,which can effectively guarantee the safety of the project.
作者
刘杰
LIU Jie(China Railway 18th Bureau Group Building Installation Engineering Co.,Ltd.,Tianjin 300450,China)
出处
《路基工程》
2025年第4期160-164,共5页
Subgrade Engineering
基金
中铁十八局集团有限公司科技研究开发计划课题:下卧倾斜地层条件下碎石桩土复合地基受力变形特性与优化(CR18GK-24-S-P-06)。
关键词
满堂支架
碎石回填土
密实度
力学验算
极限承载力
稳定性
full framing
gravel backfill soil
density grade
mechanical checking
ultimate bearing capacity
stability
