(1.浙江大學(xué) 巖土工程研究所, 杭州 310027;
2.中南大學(xué) 資源環(huán)境與建筑工程學(xué)院,長(zhǎng)沙 410083)
摘 要: 針對(duì)工程上通常不考慮平均塑性體積應(yīng)變?chǔ)さ挠绊懟蛘吆?jiǎn)單取Δ為0.01的情況，分析了飽和粘土中平均塑性體積應(yīng)變對(duì)壓密注漿的影響范圍、極限孔壓、超孔隙水壓力的影響并給出考慮其影響的計(jì)算公式。研究表明：在工程中平均塑性體積應(yīng)變的影響通常是應(yīng)該考慮的，它是反映土體變形規(guī)律的重要參數(shù)，并提出了平均塑性體積應(yīng)變的簡(jiǎn)化確定方法，操作簡(jiǎn)單，判斷快捷，適合工程應(yīng)用。當(dāng)G/Cu≤40時(shí)，可以不考慮平均塑性體積應(yīng)變的影響。
關(guān)鍵字: 飽和粘土;平均塑性體積應(yīng)變;壓密注漿;剪切剛度比
strain on compaction grouting in
saturated clay
（1.Institute of Geotechnical Engineering,
Department of Civil Engineering,
Zhejiang University, Hangzhou 310027,China;
2.College of Resources, Environment and Civil Engineering, Central South University, Changsha 410883, China）
Abstract:Aiming at the situation of neglecting the effect of average plastic volumetric strain or giving it the value 0.01 in engineering,the author analyzed its effects on the effect scope,displacement in plastic zone,ultimate pressure, excess pore water pressure in compaction grouting in saturated clay and presented the corresponding formulas.It is shown that the effect of average plastic volumetric strain should be considered generally in engineering.It's an important parameter reflecting the deformation law of soil.The average plastic volumetric strain can be obtained by the inversion with the heave height on the s urface.In general,when G/Cu is less than 40,its effect can be neglected.
Key words: saturated clay; average plastic volumetric strain; compaction grouting; shear rigidity ratio
