工程地质学报2018，Vol.26Issue(2)：467-474,8.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 SOILROCK MIXTURES AND ITS COMPACTION MECHANISM
摘要
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.关键词
土石混填/压实度/回弹模量/曲线拟合/颗粒破碎Key words
Embankment filled with soil-rock mixtures/Degree of compaction/Modulus of resilience/Curve fitting/Particle breakage分类
交通工程引用本文复制引用
孙逊,李志清,周应新,张晓锋,汪永林,岳锐强,王昊森..土石混填路基现场压实试验及其固结机理研究[J].工程地质学报,2018,26(2):467-474,8.基金项目
国家自然科学基金项目(41330643,41672316),中国科学院青年创新促进会项目(2017092),云南省交通厅科技计划项目(云交科教[2016]160号-(五)),云南省科技厅科技计划项目(2017ZE020)资助. （41330643,41672316）
