河西地区盐渍土路基综合处治技术体系与施工质量控制研究

通过对河西地区七瓜项目沿线盐渍土类型、分布特点、损坏特征及盐胀机理的分析,按照"防盐、隔盐与消胀"为一体处治思路,首次大面积采用反渗透脱盐净水技术、闷料及非盐砂砾土填料、"两布一膜"与未筛分碎石阻断层、消胀槽、桥涵台背回填、防排水及边坡防护等技术措施,提出了不同技术措施的作用机理、技术特点与施工质量控制要点,建立了河西地区盐渍土路基综合处治技术体系,为后期类似工程提供重要理论依据与技术支撑,具有积极行业示范效益与推广价值。

Study on Comprehensive Treatment Technology System and Construction Quality Control of Saline Soil Subgrade in Hexi Area

Through the analysis of the types,distribution characteristics,damage characteristics and salt expansion mechanism of saline soil along the Qigua project in Hexi Area,and according to the treatment idea of "salt prevention,salt separation and expansion elimination",comprehensive technical measures including reverse osmosis desalination and water purification technology,enclosing material and non-salt gravel soil filling, "two cloth and one film" and unscreened aggregate partition layer,expansion elimination grooves,bridge and culvert etailing backwall,waterproof and drainage as well as slope protection were first adopted,and the action mechanisms,technical characteristics and key points of construction quality control of different technical measures were put forward to establish the comprehensive treatment technology system of saline soil subgrade in Hexi Area,which provides important theoretical basis and technical support for future similar projects and has positive industry demonstration benefits and promotion value.