基于宾汉体浆液的海底隧道劈裂注浆机理研究  

Study on Fracture Grouting Mechanism in Subsea Tunnel Based on Bingham Fluids

作　　者：孙锋[1] 陈铁林[1] 张顶立[1] 张中检[2] 李鹏飞[1] 

机构地区：[1]北京交通大学隧道及地下工程教育部工程研究中心,北京100044 [2]中国科学院地质与地球物理研究所工程地质力学重点研究实验室．北京100029

出　　处：《北京交通大学学报》2009年第4期1-6,共6页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家自然科学基金资助项目(50778011)

摘　　要：基于流体流变方程和平板窄缝模型,推导出宾汉体浆液劈裂注浆扩散半径计算公式,并提出了求解方法.计算表明,注浆压力差随浆液流变参数的增大呈线性增大,要达到一定劈裂长度,水灰比越小所需注浆压力越大;裂隙宽度的减小使所需注浆压力差迅速增大,并使扩散半径迅速减小,这种影响随着水灰比的增大而减小.结合厦门翔安海底隧道全风化花岗岩地层HSC(High Strength Concrete)水泥注浆试验,证明了这一理论的计算结果符合工程实际.Based on the assumption of bingham fluid and narrow plate model, formula for calculating the diffusion radius in low permeability soil is deduced, and solution method is pointed out. Grouting pressure difference varies with the rheological parameters linearly. With the decrease of gap width, grouting pressure difference increases rapidly and diffusion radius decreases notably. The rheological parameters of grouting have a remarkable influence on the test results. Combing with the study on the HSC （High Strength Concrete） grouting test adopted in strong-weathered granite in Xiamen Xiangan subsea tunnel, this formula has proved to be successful in practice.

关 键 词：海底隧道 劈裂注浆 宾汉体 扩散半径 流变参数 

分 类 号：TU435[建筑科学—岩土工程]