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BRIEF RESEARCH REPORT article
Front. Earth Sci.
Sec. Geohazards and Georisks
Volume 13 - 2025 | doi: 10.3389/feart.2025.1593528
This article is part of the Research TopicEvolution Mechanism and Prevention Technology of Karst Geological Engineering DisastersView all 8 articles
Study on strength prediction of grouting filling body in karst areas considering pressure filter effect
Provisionally accepted- 1Yunnan Honghe Hydropower Survey and Design Institute, Yunnan, China
- 2The Administration Bureau of Large-scale Irrigation Areas in Honghe Prefecture, Yunnan, China
- 3Changsha Building Engineering School, Changsha, Anhui Province, China
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The slurry under grouting pressure and karst - boundary constraints undergoes pressure - filtration. The initial consolidation strength of the karst - area embankment curtain is much higher than the slurry’s natural consolidation strength. Using the natural consolidation strength to build the curtain life - prediction model causes significant engineering - practice deviations. To address this issue, this paper first derives a theoretical formula for calculating the initial consolidation strength of the grouted curtain body, taking into account the erosive effects of karst water ions and the pressure-filtering effect. Secondly, a life prediction model for grouting curtains in karst areas, which incorporates the pressure-filtering effect, is developed, and its feasibility is demonstrated through indoor accelerated testing. Finally, the research findings were successfully applied to guide the curtain de-reinforcement project at the Yingpan Reservoir in Yunnan Province.The results indicate that the theoretical formula for the initial consolidation strength of the grouted curtain body, which considers the pressure-filtering effect, more accurately characterizes the initial conditions of the curtain. Additionally, the theoretical values derived from the curtain life prediction model closely align with the accelerated experimental test values, with an error margin of less than 15%. This demonstrates that the theoretical prediction model can effectively forecast the service life of the curtain body under conditions of karst water erosion. The successful engineering application further confirms the feasibility and practicality of the theoretical prediction model. Given the increasing number of similar cases, the research findings hold significant application potential and practical value.
Keywords: karst area embankment, pressure-filtration effect, grouted curtain body, Strength calculation, Life prediction
Received: 14 Mar 2025; Accepted: 10 Apr 2025.
Copyright: © 2025 ZHAO, DUAN, LIU, XIE and LI. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: YINGLIN LIU, The Administration Bureau of Large-scale Irrigation Areas in Honghe Prefecture, Yunnan, China
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