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| Power law model of annular distribution of slurry diffusion pressure |
| Received:May 28, 2019 Revised:August 13, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20190528001 |
| KeyWord:backwall grouting power law slurry theoretical derivation grouting pressure |
| Author | Institution |
| 黄轩 |
太原理工大学 矿业工程学院 地下工程系, 太原 |
| 杨双锁 |
太原理工大学 矿业工程学院 地下工程系, 太原 |
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| Abstract: |
| To study the power law type slurry grouting grouting pressure change,considering the new injection shield tail section between grout and has injection grout effect,in the case that the wall grouting shield tail at form 3 d annular clearance,put forward the power law model grout diffusion pressure ring to distribution model,and using the theory of fluid mechanics was deduced to distributed power law type grout diffusion pressure ring,analyzes the scope and the formula parameters of practical significance to compared with the actual engineering data,verify the validity of the model and the calculation formula results show that the calculation formula can reflect the grouting in toroidal pressure value size distribution of each position;When the consistency coefficient n=1,the formula is the Newtonian fluid formula,and the annular pressure diffusion model is also applicable.The annular diffusion pressure of power law fluid is less than that of Newtonian fluid.Under the influence of grout weight,the upward expression of grouting hole is pressure reduction,and downward expression of grouting hole is pressure.The distribution section of pressure ring presents an irregular ring with upper narrow and lower wide.The larger the water-cement ratio is,the smaller the slurry diffusion pressure is. |
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