华北水利水电大学学报（自然科学版）2024，Vol.45Issue(3)：67-76,10.DOI:10.19760/j.ncwu.zk.2024031
高速公路软弱路基边坡沉降滑移机理分析及微型桩复合加固
Analysis of the Mechanism of Settlement and Slip of Weak Subgrade Slope of Expressway and Micro-pile Composite Reinforcement
摘要
Abstract
Based on the Ubisa-Shorapani(F3)tender section project of Georgia E60 Expressway,one of the key contribu-tion projects of China′s ″Belt and Road″ initiative,and in view of the settlement and slip of the weak subgrade slope of the highways,through on-site measurements and numerical simulations,the mechanism is explored and demonstrated,and the composite reinforcement measures with connected beam type micro-pile are proposed,and the parameters of the structure are optimized.The results are as follows.The safety and stability coefficient of the roadbed slope shows a trend of first in-creasing and then decreasing as the distance(Lx)between the first row of piles in the reinforcement area and the top of the slope increases.When Lx =2 m and pile inclination angle is 15°,the maximum safety stability coefficient is 1.542.The difference in the safety and stability coefficients for different pile diameters is small,with a maximum difference of only 0.1.Based on the sensitivity analysis optimization scheme,the maximum horizontal displacement of soil at the foot of slope after optimization is 10.8 mm.Compared with the untreated period,it was reduced by approximately 88.0 mm,a reduction of 89.1%.The maximum surface settlement on the left side of the roadbed is only 7.9 mm,which is about 12.1 mm or 60.5%less than that before the treatment.As time goes on,soil settlement gradually becomes uniform and stable.关键词
高速公路/软弱路基边坡/沉降与滑移/微型桩复合加固/方案优化Key words
expressway/weak subgrade slope/settlement and slip/micro-pile composite reinforcement/scheme optimiza-tion分类
建筑与水利引用本文复制引用
梁斌,卜一鸣,邓洪龙,刘江,李文杰..高速公路软弱路基边坡沉降滑移机理分析及微型桩复合加固[J].华北水利水电大学学报（自然科学版）,2024,45(3):67-76,10.基金项目
国家自然科学基金项目(U1604135) （U1604135）
中交集团第二公路工程局重点科研项目(2020-2-15) （2020-2-15）
河南省科技厅产学研合作项目(2015HNCXY011). （2015HNCXY011）
