压密注浆的能量分析方法  

Method of energy analysis for compaction grouting

作　　者：邹金锋[1] 李亮[1] 杨小礼[1] 王志斌[1] 何长明[1] 

机构地区：[1]中南大学土木建筑学院,长沙410075

出　　处：《岩土力学》2006年第3期475-478,共4页Rock and Soil Mechanics

基　　金：国家自然科学基金资助项目(No.50408020)

摘　　要：为了能够从能量的角度分析压密注浆的力学机理,并给出注浆压力的理论解,将整个注浆过程视为无限土体中的圆孔扩张问题,根据注浆过程中能耗区土体在注浆压力和静止土压力作用下的应力、应变和体变关系以及注浆扩孔过程中的能量和体变守恒原理,推导出压密注浆极限注浆压力的理论解答。计算和分析表明,理论解的计算结果与工程实际比较吻合,而且球形扩孔的注浆压力比柱形扩孔的注浆压力要小得多,初步证实了理论解的可靠性。In order to analyze the mechanical mechanism of compression grouting and give the analytical solution of the ultimate grouting pressure, the process of compaction grouting is considered as the question of cavity expansion in infinite soil mass. The ultimate grouting pressure is given by the law of conservation, in which the volume change of cavity expansion is balanced with the compression of soil and the energy given out from cavity expansion is absorbed by the volume change and shear strain caused in soil. The stress-strain-volume change relationships under the high stresses caused by compression grouting are described. The theoretical values agree with the measured values from the field test; and the conclusion that the grouting pressure of columniation cavity is higher than the sphere cavity is gained.

关 键 词：压密注浆 能量守恒 体变守恒 极限注浆压力 扩孔 

分 类 号：TU43[建筑科学—岩土工程]