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以霍永高速公路湿陷性黄土路基地基处理施工为工程背景,深入研究了湿陷性黄土路基冲击碾压、重夯夯实、强夯补强的施工方法,以克服湿陷性黄土路基在自重压力或自重压力与附加压力作用下受水浸湿后土的结构迅速破坏,产生显著下沉的黄土的现象,供同类工程施工借鉴。通过对施工过程中数据的整理和分析,研究确定冲击碾机具碾压遍数、沉降量及有效处理深度,确定重锤及强夯夯击能、夯击次数、沉降量与处理深度的关系,确保湿陷性黄土路基地基处理及填筑的质量控制,通过这些方法来短期减少工后沉降,消除部分湿陷性,保证路基的整体稳定性。
Taking Huayong Expressway collapsible loess subgrade treatment as engineering background, the construction methods of collapsible loess subgrade with impact compaction, ramming compaction and dynamic compaction are studied in depth to overcome the problems of collapsible loess subgrade Self-weight pressure or gravity pressure and additional pressure under the action of wet soaked soil quickly destroyed the structure, resulting in significant sinking loess phenomenon for the construction of similar projects for reference. Through the sorting and analysis of the data in the construction process, the paper studied and determined the number of crushing, settlement and effective treatment depth of impact crusher, determined the relationship between weight and ramming impact energy, number of ramming, settlement and treatment depth, To ensure the quality control of collapsible loess subgrade treatment and filling, through these methods to short-term post-construction settlement to reduce, to eliminate some of the collapsibility, to ensure the overall stability of roadbed.