Triaxial Damage Characteristics and Constitutive Modelling of Polymer- Grouted Consolidated Masses in Gravelly Strata

Triaxial Damage Characteristics and Constitutive Modelling of Polymer- Grouted Consolidated Masses in Gravelly Strata | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Triaxial Damage Characteristics and Constitutive Modelling of Polymer- Grouted Consolidated Masses in Gravelly Strata Huang Lei, Gao Yang, Jian Wu, Du Xueming, Zhang Yang, Gu Zhanchao, and 2 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-9338831/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 11 You are reading this latest preprint version Abstract Addressing the challenges of low diffusion efficiency and inadequate continuity of conventional grouting in water-rich gravelly strata, this study investigates the mechanical behaviour and damage evolution characteristics of polymer-grouted consolidated masses under triaxial stress conditions. Consolidated specimens with varying fractal dimensions of sand and gravel particle size were prepared via visual grouting tests. Conventional triaxial compression tests were conducted at a confining pressure of 0.95 MPa to analyse the stress-strain response, strength characteristics, and damage evolution. An elastoplastic-damage coupled Drucker-Prager constitutive model was formulated within the continuum damage mechanics framework, incorporating a three-stage behaviour of “compaction-damage development-post-peak softening/residual”. The equivalent plastic strain was introduced as the driving variable for damage evolution, and a piecewise damage evolution equation was developed by combining a Weibull statistical function and an exponential post-peak softening function. The effects of particle size fractal dimension and confining pressure were explicitly integrated into the model parameters. The results show that an increase in fractal dimension leads to enhanced peak strength and peak strain, mitigated post-peak softening, and improved residual bearing capacity, accompanied by a significant delay in damage initiation. The modified model predictions show good agreement with the experimental triaxial curves, accurately capturing the triaxial mechanical response of polymer-grouted consolidated masses with different fractal structures. Polymer grouting Gravelly strata Triaxial damage Constitutive model Fractal dimension Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Under Review Version 1 posted Reviews received at journal 18 May, 2026 Reviews received at journal 14 May, 2026 Reviews received at journal 12 May, 2026 Reviewers agreed at journal 10 May, 2026 Reviewers agreed at journal 09 May, 2026 Reviewers agreed at journal 22 Apr, 2026 Reviewers invited by journal 22 Apr, 2026 Editor invited by journal 20 Apr, 2026 Editor assigned by journal 18 Apr, 2026 Submission checks completed at journal 15 Apr, 2026 First submitted to journal 15 Apr, 2026 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-9338831","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":627802516,"identity":"a9c6077e-ffdd-4657-9541-8831ff0ba690","order_by":0,"name":"Huang Lei","email":"","orcid":"","institution":"PowerChina Huadong Engineering Corporation Limited","correspondingAuthor":false,"prefix":"","firstName":"Huang","middleName":"","lastName":"Lei","suffix":""},{"id":627802525,"identity":"0219f396-6d27-44e7-b5c1-9ba4a4e8b17a","order_by":1,"name":"Gao Yang","email":"","orcid":"","institution":"Zhengzhou 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