交通荷载下高原公路翻浆病害机理与处治对策  

Mechanism of Mud Pumping on Plateau Highway under Traffic Loads and Its Treatment Strategy

作　　者：张军辉 陈志德 高峰 纳启财 马鹏飞 肖林 ZHANG Junhui;CHEN Zhide;GAO Feng;NA Qicai;MA Pengfei;XIAO Lin(Key Laboratory of Highway Engineering,Ministry of Education,Changsha University of Science&Technology,Changsha,Hunan 410114,China;Science and Technology Information Department,Qinghai Transportation Holding Group Co.,Ltd.,Xining,Qinghai 810021,China;Engineering Technology Department,Qinghai Expressway Maintenance Service Co.,Ltd.,Xining,Qinghai 810021,China)

机构地区：[1]长沙理工大学公路工程教育部重点实验室,湖南长沙410114 [2]青海省交通控股集团有限公司科技信息部,青海西宁810021 [3]青海省高速公路养护服务有限公司工程技术部,青海西宁810021

出　　处：《中外公路》2025年第1期1-10,共10页Journal of China & Foreign Highway

基　　金：国家自然科学基金青年基金资助项目(编号:52308438);湖南省自然科学基金青年基金资助项目(编号:2023JJ40035);湖南省公路先进建养技术国际科技创新合作基地开放基金资助项目(编号:kfj220801);公路工程教育部重点实验室开放基金资助项目(编号:kfj2405)。

摘　　要：交通荷载下路基结构动水力响应及颗粒迁移特性是揭示翻浆病害形成机理和演化机制的基础与关键。该文通过开展动荷载下分层砾石-砂粉土柱试验,探究了翻浆状态下细粒迁移的驱动机制。试验结果表明:泥浆晃动造成砾石层内交替出现了正、负值压力梯度,该振荡压力梯度有效增强下部砂粉土层孔隙渗流,随后为细粒迁移提供了必要的动水力条件。细粒迁移导致泥浆浊度增大至稳定值,撤去动力加载泥浆,细粒很快发生沉降并填充在砾石孔隙中形成泥化夹层,从而显著降低砾石-砂粉土柱的竖向渗透性。结合青海省G0615德马高速公路(花石峡至久治段)翻浆病害处治工程实践,发现降雨融雪水分从沥青面层入渗为病害重要诱因,这些水分甚至在基层内产生“水包”。车辆通过时路面结构层挤压变形,水稳基层中泥浆沿裂隙向上冒出并造成砂砾料逐渐发生侵蚀破坏。考虑施工难度、经济成本和青藏高原生态环境保护要求,根据病害等级和危害程度不同,分别采用了注浆修补封闭法和开挖铣刨封闭法进行病害处治。上述方法在加固封闭水稳基层、降低路面渗透性等方面发挥了积极作用。相关研究为认识翻浆病害发展规律、提升病害处治能力及推动高原公路高品质养护提供了有益借鉴。The dynamic hydraulic response and particle migration of subgrade structures under traffic loads are fundamental to reveal the formation and development mechanisms of mud pumping.The driving mechanism of fine particle migration in the mud pumping state was explored by conducting laboratory tests on layered gravel-sandy silt columns under dynamic loads.The results show that the slurry sloshing causes alternating positive and negative pressure gradients within the gravel layer.This oscillating pressure gradient enhances the pore permeability in the underlying sandy silt layer,providing the necessary hydrodynamic conditions for fine particle migration.Fine particle migration increases the slurry turbidity to a stable value.Upon the removal of dynamic slurry loading,the fine particles quickly settle and fill the gravel pores,forming a muddy interlayer,which significantly reduces the vertical permeability of the gravel-sandy slit column.Based on the engineering practice of treating mud pumping on the G0615 Dema Expressway(Huashixia to Jiuzhi Section)in Qinghai Province,it was found that an important driver for mud pumping formation is the infiltration of rainfall and snowmelt water through the asphalt surface layer,and this water can even form“water pockets”within the subbase.When vehicles pass,the deformation of the pavement structural layers causes the slurry in the pores of the water-stable base layer to be squeezed upward through cracks,leading to continuous erosion and damage to the gravel materials.By considering construction difficulty,economic costs,and the ecological environmental protection requirements of the Qinghai‒Xizang Plateau,different treatment methods such as grouting repair and sealing,as well as milling and sealing were adopted,respectively based on the severity and level of the hazard.These methods have played a positive role in sealing and reinforcing the water-stable base layer and reducing pavement permeability.The research provides valuable insights for understanding the development pat

关 键 词：翻浆冒泥 抽吸效应 性能劣化 病害处治 高原公路 

分 类 号：U416[交通运输工程—道路与铁道工程]