Based on the engineering geologic investigation reports of 22 buildings and the author ' s own tests in lab ( which includes 18 groups of conventional test and compression test , 8 groups of unconsolidated undrained triaxial test and 8 groups of quick direct shearing test ) , taiyuan silt is studied in the paper . firstly , the variability of silt indexes is analyzed . the analyses results show the change laws on variability , in addition , the average value and variability coefficient ranges of silt indexes are given for reference 本文以太原地區(qū)粉土為研究對(duì)象,在收集、整理了22個(gè)建筑工程場(chǎng)地勘察報(bào)告和作者室內(nèi)試驗(yàn)成果( 18組常規(guī)試驗(yàn)和壓縮試驗(yàn)、 8組不固結(jié)不排水三軸剪切和8組直剪快剪試驗(yàn))的基礎(chǔ)上,對(duì)太原粉土作了以下方面的分析研究:首先研究了粉土工程性質(zhì)指標(biāo)的變異性,得出了變異系數(shù)的變化規(guī)律,給出了各工程性質(zhì)指標(biāo)均值和變異系數(shù)范圍的建議值。