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土石填方地基的压实质量直接影响着上部结构的沉降变形和稳定性,如何有效地评价土石填方地基的压实质量是土石填方施工质量控制中亟待解决的关键技术问题。基于土石填料的波动传播特性和电阻率特性,构建了波电场耦合检测路基压实质量的理论模型,基于该模型提出了适用于填方地基现场压实质量检测的波电场耦合快速测试方法。将该方法应用于土石填方地基现场,采用面波测试的方法测试土石地基的波动信号,利用瑞利波的频散效应分析测试断面的横波波速,采用直流电阻率法采集测量断面的电阻率数据。对现场地基填料的波电场参数统计分析,构建了基于波电场耦合的填方地基压实度计算模型,利用现场测试的波电场参数对填方地基的压实质量进行了综合评价。结果表明,构建的模型综合了土石填料的波电场参数,应用过程中测试方便,计算简单,便于快速检测。
The compaction quality of earthwork foundation directly affects the settlement deformation and stability of the superstructure. How to effectively evaluate the compaction quality of earthwork foundation is a key technical problem to be solved urgently in construction quality control of earthwork fill. Based on the wave propagation characteristics and resistivity characteristics of soil-stone filler, a theoretical model of electric field coupling to detect the compaction quality of subgrade is established. Based on this model, a fast coupling test method is proposed for field compaction quality inspection of fill foundation. The method is applied to the site of earthwork in embankment, the wave signal of earth and rock foundation is tested by the method of surface wave test, the shear wave velocity of the test section is analyzed by the dispersion effect of Rayleigh wave, the resistivity of the cross section is acquired by DC resistivity method data. Based on the statistical analysis of the wave field parameters of the ground-based filler, a compaction calculation model was established based on the coupling of wave and electric field. The compaction quality of the subgrade was comprehensively evaluated by the wave field parameters of the field test. The results show that the constructed model integrates the wave electric field parameters of soil filler, which is convenient to test, simple to calculate and convenient for rapid detection.