孙逊, 李志清, 周应新, 张晓锋, 汪永林, 岳锐强, 王昊森. 2018: 土石混填路基现场压实试验及其固结机理研究. 工程地质学报, 26(2): 467-474. DOI: 10.13544/j.cnki.jeg.2016-381
    引用本文: 孙逊, 李志清, 周应新, 张晓锋, 汪永林, 岳锐强, 王昊森. 2018: 土石混填路基现场压实试验及其固结机理研究. 工程地质学报, 26(2): 467-474. DOI: 10.13544/j.cnki.jeg.2016-381
    SUN Xun, LI Zhiqing, ZHOU Yingxin, ZHANG Xiaofeng, WANG Yonglin, YUE Ruiqiang, WANG Haosen. 2018: FIELD COMPACTION TEST OF EMBANKMENT FILLED WITH SOIL-ROCK MIXTURES AND ITS COMPACTION MECHANISM. JOURNAL OF ENGINEERING GEOLOGY, 26(2): 467-474. DOI: 10.13544/j.cnki.jeg.2016-381
    Citation: SUN Xun, LI Zhiqing, ZHOU Yingxin, ZHANG Xiaofeng, WANG Yonglin, YUE Ruiqiang, WANG Haosen. 2018: FIELD COMPACTION TEST OF EMBANKMENT FILLED WITH SOIL-ROCK MIXTURES AND ITS COMPACTION MECHANISM. JOURNAL OF ENGINEERING GEOLOGY, 26(2): 467-474. DOI: 10.13544/j.cnki.jeg.2016-381

    土石混填路基现场压实试验及其固结机理研究

    FIELD COMPACTION TEST OF EMBANKMENT FILLED WITH SOIL-ROCK MIXTURES AND ITS COMPACTION MECHANISM

    • 摘要: 基于压实度和弯沉值检测在某高速公路检验路基质量标准的应用实践,通过现场填筑试验,分析土石混填路基的压实固结机制并探讨不同施工因素(碾压次数、虚铺高度、颗粒级配、洒水遍数、振动方式)及其组合形式对压实质量的影响。研究结果表明:(1)随着碾压遍数逐渐增大,路基弯沉值先减小后平稳,压实度先增大后平稳;(2)先两遍静压再六遍高频率振动碾压,松铺厚度为30 cm,洒水两到三遍可以进一步改善压实效果;(3)颗粒破碎是影响路基压实度增大的因素之一,压实度增大是粗颗粒破碎成细颗粒,填充颗粒间孔隙,使粗细颗粒彼此咬合的结果。通过对试验结果的分析,提出了路基压实度与回弹模量的高斯指数关系,可作为高速公路快速安全施工的理论参考。

       

      Abstract: This paper illustrates a case study detecting roadbed quality of a highway embankment through its degree of compaction and the Benkelman Beam static deflection method. Based on field filling test, the paper examines the compaction mechanism of embankment filled with soil-rock mixtures, and the influence of different construction parameters(times of rolling, loose laying depth, grain composition, moisture content and mode of vibration) and their different combinations to compaction effect. The results indicate that:(1)As compaction effort increases, the deflection value of roadbed decreases at first and then stabilizes gradually, while the degree of compaction increases at first and then stabilizes gradually. (2)It will be a better degree of compaction for the roadbed by carrying out static pressure twice, high frequency vibration six times, 30 cm loose laying depth and sprinkling two or three times. (3)Particle breakage is one of the factors that increase the compactness of roadbed. As the coarse particles break into fine particles, which has filled the interstices and engaged for each other, the degree of compaction gradually increases. According to these test results, this paper establishes the Gaussian exponential relationship between the degree of compaction and modulus of resilience. It can provide a theoretical guidance for the highway embankment construction.

       

    /

    返回文章
    返回