Landslide-reinforcement method and its application based on jet grouting to improve sliding-soil strength

IF 6.9 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Engineering Geology Pub Date : 2025-02-18 DOI:10.1016/j.enggeo.2025.107976

Bolin Chen , Haiyou Peng , Wenjun Yang , Si Chen , Peizhe Zhang , Xiaoming Ye , Qi Guo , Shuang Wei , Hao Mei

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引用次数: 0

Abstract

Owing to its versatility in civil-engineering applications such as slope stabilisation, foundation consolidation, and tunnel construction, jet grouting has been lauded for its swift implementation, cost effectiveness, and high structural integrity. This study introduces an innovative framework and procedural technique for landslide reinforcement using jet grouting. Using the transfer-coefficient method, we develop an integrated strength model that encompasses the altered mechanical attributes of soil layers following jet-grouting treatment at the slide interface. This model underpins a bespoke stability calculation formula for landslides reinforced by jet grouting. The Sanhepu landslide is used as a case study, where the methodology unfolds across the testing, reinforcement-scheme design, project-execution, and monitoring phases. Our study shows that jet grouting substantially enhances the shear strength of sliding soil, with the treated soil exhibiting greater strength than its interface with a rock. A strategic reinforcement plan that considers the positioning, spacing, and height of jet-grouting columns is shown to significantly improve landslide stability. The stability coefficient for the Sanhepu site increases significantly from 1.184 before intervention to 1.453 after intervention. The theoretical findings are applied in practice to the Sanhepu landslide, with emphasis on targeted sliding-soil reinforcement. Post-intervention monitoring substantiates the stabilisation and confirms the effectiveness of the jet-grouting method for soils susceptible to sliding.

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基于喷射注浆的滑坡加固方法及其在提高滑土强度中的应用

由于其在边坡稳定、地基加固和隧道施工等土木工程应用中的多功能性，喷射注浆因其实施迅速、成本效益高和结构完整性高而受到称赞。介绍了一种创新的滑坡喷射注浆加固框架和程序技术。利用传递系数法，我们建立了一个综合强度模型，该模型包含了在滑动界面处进行喷射注浆处理后土层力学属性的变化。该模型为喷射注浆加固滑坡的稳定性计算公式提供了基础。本文以三合浦滑坡为例，从试验、加固方案设计、项目执行和监测阶段展开了方法研究。我们的研究表明，喷射注浆显著提高了滑动土的抗剪强度，处理后的土比其与岩石的界面强度更大。考虑喷浆柱位置、间距和高度的策略加固方案可显著提高滑坡稳定性。三合浦场地的稳定系数由干预前的1.184显著增加到干预后的1.453。将理论研究结果应用于三合浦滑坡的实际治理中，重点进行了有针对性的滑土加固。干预后的监测证实了该方法的稳定效果，并证实了该方法对易滑土的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Engineering Geology 地学-地球科学综合

CiteScore

13.70

自引率

12.20%

发文量

327

审稿时长

5.6 months

期刊介绍： Engineering Geology, an international interdisciplinary journal, serves as a bridge between earth sciences and engineering, focusing on geological and geotechnical engineering. It welcomes studies with relevance to engineering, environmental concerns, and safety, catering to engineering geologists with backgrounds in geology or civil/mining engineering. Topics include applied geomorphology, structural geology, geophysics, geochemistry, environmental geology, hydrogeology, land use planning, natural hazards, remote sensing, soil and rock mechanics, and applied geotechnical engineering. The journal provides a platform for research at the intersection of geology and engineering disciplines.