摘要
为解决市政道路改扩建工程中复杂地质条件下的路基加固难题,以某改建工程为依托,系统分析地聚合物注浆技术对路基应变分布及长期稳定性的影响。模拟结果表明,未注浆路段路基顶面最大主应变为96.54με,超出《城市道路路基设计规范》限值(≤80με),存在应变超限及承载能力不足问题。注浆施工后,测点3路基顶弯沉值相较于注浆前降低了54.2%;测点6路基回弹模量提升了82.8%,所有检测指标均满足规范要求。综上,地聚合物注浆技术能够显著提升路基强度与刚度,有效抑制交通动载下的塑性变形,是一种可靠的路基加固方案。
To solve the problem of subgrade reinforcement under complex geological conditions in municipal road reconstruction and expansion projects,based on a certain reconstruction project,the influence of geopolymer grouting technology on the strain distribution and long-term stability of the subgrade was systematically analyzed.The simulation results show that the maximum principal strain on the top surface of the subgrade in the ungrouting section is 96.54με,which exceeds the limit value(≤80με)in the“Code for Design of Urban Road Subgrade”,and there are problems of strain over-limit and insufficient bearing capacity.After the grouting construction,the deflection value of the top bend of the roadbed at measurement point 3 decreased by 54.2%compared with that before grouting.The springback modulus of the subgrade at measurement point 6 increased by 82.8%,and all the test indicators met the requirements of the specifications.In conclusion,geopolymer grouting technology can significantly enhance the strength and rigidity of the roadbed,effectively suppress plastic deformation under traffic dynamic loads,and is a reliable roadbed reinforcement solution.
作者
张扬
ZHANG Yang(Anhui Woheng Construction Project Management Co.,Ltd.)
出处
《广东建材》
2025年第8期145-148,共4页
Guangdong Building Materials
关键词
道路改扩建工程
地聚合物注浆
路基加固
有限元分析
检测评估
Road reconstruction and expansion projects
Geopolymer grouting
Roadbed reinforcement
Finite element analysis
Detection and evaluation
