摘要
在分析胶州湾海底隧道注浆方案及浆液特性的基础上,采用牛顿流体类的刘嘉才公式进行裂隙岩体注浆扩散半径计算。计算结果表明:当设计注浆压力为3～4MPa、注浆孔半径为5cm和注浆时间为1800～3600s时,浆液的扩散半径能满足设计要求;浆液的扩散半径随着注浆时间的增加而增大,在注浆时间相同时,浆液的扩散半径随着裂隙宽度的减小而减小;浆液的扩散半径随着注浆压力的增加而增大,但在注浆压力相同时,浆液的扩散半径随着裂隙宽度的减小而减小。
Theoretical solution based on Newton fluid assumption was used to estimate the effectiveness of grouting in fractured rock encountered at Jiaozhou Bay Tunnel. The solution suggests 1） predetermined grouting radius can be achieved with a design pressure of 3 to 4 MPa, a grouting hole radius of 5 cm, and a grouting duration of 1800 to 3600 seconds~ 2） the effective radius of grout zone increases with time~ 3） the effective radius of grout zone increases with grout pressure~ 4） the effective radius of grout zone increases with the aperture of rock fractures.
出处
《土工基础》
2012年第5期51-53,共3页
Soil Engineering and Foundation
基金
上海高校选拔培养优秀青年教师科研专项基金(Gjd10020)
上海市教育委员会重点学科建设项目资助(J51401)
关键词
海底隧道
裂隙岩体
注浆扩散半径
牛顿流体
Underwater Tunneling, Fractured Rock, Radius of Grout Zone, Newton Fluid
