激波作用后水泥试样渗流评价实验研究  

Permeability evaluation of cement samples under shock waves

作　　者：林英松[1] 刘兆年[1] 张宝康[1] 蒋金宝[1] 

机构地区：[1]中国石油大学(华东)石油工程学院,山东东营257061

出　　处：《岩土工程学报》2008年第7期1079-1083,共5页Chinese Journal of Geotechnical Engineering

基　　金：国家"863"计划项目(2007AA062208)

摘　　要：在水中激波对饱和水泥试样冲击实验的基础上,通过弹性波速测量、孔隙度测量和渗透率测量实验,利用量纲分析确定了引起水泥损伤的主要因素,并确定出激波压力和弹性波速平方的线性关系,使用经验公式回归出弹性波速和裂缝孔隙度的关系,最后通过离散裂缝模型简化求出裂缝渗透率和裂缝孔隙度的计算公式。通过以上关系,找出激波压力对裂缝渗透率的提高作用,得出激波压力和裂缝孔隙度为二次多项式关系,确定出提高水泥试样渗透率最优的动载荷条件。Based on the impact experiments on saturation cement samples in water, the velocity of elastic wave, porosity and permeability of samples were measured. The linear relation between the exploding wave pressure and the square of velocity of elastic wave was obtained by using dimensional analysis, the relation between the velocity of elastic wave and the fracture porosity was obtained through empirical equations, and the formula for permeability and porosity of fracture was obtained by means of model simplification. The effect of exploding waves on enhancement of fracture permeability was obtained and the optimum exploding loading was determined.

关 键 词：激波 裂缝渗透率 孔隙度 弹性波速 水泥试样 

分 类 号：TU452[建筑科学—岩土工程]