裂隙岩体注浆中的浆液–岩体耦合效应分析

doi:10.13722/j.cnki.jrme.2015.0975

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摘要基于岩体卸荷–加载理论与平板裂隙浆液运移方程，建立考虑浆液对岩体单向耦合作用的裂隙岩体注浆理论模型，对注浆过程中浆液与围岩的相互作用展开研究。研究表明，裂隙岩体注浆伴随着浆液压力对岩体卸荷与重新加载过程，岩体完全卸荷后，隙宽将随浆液压力增加，对于近似水平展布的裂隙，隙宽增量随扩散距离近似呈线性衰减，裂隙越小衰减速率越快。岩体受浆液卸荷影响范围大于浆液扩散范围，裂隙越小受浆液–岩体耦合作用越显著。裂隙组中相邻的裂隙在注浆过程中相互影响，较大裂隙进一步张开，较小裂隙趋于闭合，导致浆液在微小裂隙中的扩散范围减小或无法注入，并在较大裂隙中大量无效扩散，单纯提高注浆压力不会改善对较小裂隙的注浆封堵效果。研究结论对裂隙岩体注浆工程提供了一定指导与借鉴。

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	郑卓
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关键词 ：岩石力学；浆液运移；流&ndash, 固耦合；注浆工程

Abstract：According to theory of unloading-loading process for rock mass and grouting migration function of parallel fracture，theoretical model is established for jointed rock grouting considering one-way coupling effect of grout and rock mass，and interaction between grout and surrounding rock during grouting are carefully studied. Results show that，grouting in jointed rock mass is companied by the process of grout pressure unloading and re-loading the fracture. After the rock mass are totally unloaded，fracture aperture will increase with grout pressure. The increment drops along with spreading distance almost linearly，with a larger drop rate for smaller fracture. The unloading area is larger than grout spreading area，and the coupling effect is more obvious for smaller fractures. Adjacent fractures influence each other，leading to the larger one open further and the smaller one tends to close. Thus，spreading distance in the small fracture is limited or cannot injected，while in large the fracture grout spreads is too far and thus of no effect. Sealing efficiency cannot be improved only increase grouting pressure. Results may provide reference to jointed rock grouting project.

Key words： rock mechanics grout migration fluid-solid coupling grouting project

引用本文:

郑卓，李术才，刘人太，朱光轩，张连震，潘东. 裂隙岩体注浆中的浆液–岩体耦合效应分析[J]. 岩石力学与工程学报, 2015, 34(S2): 4054-4062.
ZHENG Zhuo，LI Shucai，LIU Rentai，ZHU Guangxuan，ZHANG Lianzhen，PAN Dong. ANALYSIS OF COUPLING EFFECT BETWEEN GROUT AND ROCK MASS DURING JOINTED ROCK GROUTING. , 2015, 34(S2): 4054-4062.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2015.0975 或 https://rockmech.whrsm.ac.cn/CN/Y2015/V34/IS2/4054

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