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    當前位置:科學網首頁 > 基金首頁 > 深埋隧洞圍巖水-力-損傷耦合的宏細觀機制與多尺度建模方法

    國家自然科學基金項目查詢

    深埋隧洞圍巖水-力-損傷耦合的宏細觀機制與多尺度建模方法

    批準號51709072 學科分類巖土力學與巖土工程 ( E0907 )
    項目負責人劉武 負責人職稱講師 依托單位合肥工業大學
    資助金額24.00
    萬元
    項目類別青年科學基金項目 研究期限2018 年 01 月 01 日 至
    2020 年 12 月 31 日
    中文主題詞裂隙巖體;水-力耦合;損傷演化;滲透特性演化;深埋隧洞
    英文主題詞fractured rocks;hydro-mechanical coupling;damage evolution;permeability evolution;deep tunnel

    摘要

    中文摘要 深埋隧洞圍巖水-力-損傷耦合的宏細觀機制是深埋隧洞工程災害防治迫切需要解決的關鍵問題,也是巖石力學領域的重要基礎性研究課題。本項目以結晶巖體中的深埋隧洞圍巖為研究對象,采用試驗、理論分析、數值模擬與監測反饋相結合的方法,從多尺度視角開展水-力耦合條件下裂隙巖體的損傷擴容機理和滲透特性演化規律研究,建立綜合考慮巖體內部裂隙、微裂紋等不同尺度結構變化影響的深埋隧洞圍巖各向異性損傷模型與滲透特性演化模型,揭示裂隙巖體多尺度結構損傷及其誘發的滲透特性演化的細觀機制,建立裂隙巖體水-力-損傷耦合數學模型與三維有限元數值模擬方法,揭示巖體水-力-損傷耦合特性對深埋隧洞開挖擾動效應的影響,探討水-力-損傷耦合條件下圍巖滲流、變形與穩定協同控制策略。研究成果對于深化裂隙巖體水-力-損傷耦合機理研究具有重要理論意義,對于深埋隧洞工程地質災害防治具有重要的應用價值。
    英文摘要 The macro-meso mechanism of coupled hydro-mechanical-damage processes in surrounding rocks is a key issue that needs to be addressed urgently for the areas of disaster prevention and mitigation for deep tunnels, and is also a fundamental subject in the field of rock mechanics. By using a comprehensive methodology of laboratory tests, theoretical analysis, numerical simulations as well as in-situ monitoring and inverse modeling, the project intends to give an insight into the dilatant damage and permeability evolution behaviors for surrounding rocks of deep tunnel in crystalline rocks under hydro-mechanical coupling condition from the perspective of multi-scale. An anisotropic damage model and a permeability evolution model will be presented with the consideration of the influence of structural alteration at different scales (such as fractures and microcracks), which will be able to capture the meso-mechanism of multi-scale structural damage evolution and its induced change in the permeability for fractured rocks. Then a mathematical model and a numerical method for coupled hydro-mechanical-damage processes in fractured rocks will be formulated. Finally, the coupled hydro-mechanical-damage processes under the condition of deep tunnel excavation will be simulated to capture the influences of the coupling property on the excavation disturbed effect of surrounding rocks, and then a synergetic control strategy of seepage flow, mechanical deformation and stability for deep tunnel under hydro-mechanical-damage coupling conditions will be studied. The research results will provide a significance theoretical contribution in better understanding the coupled hydro-mechanical-damage behaviors of fractured rocks, and also provide important practical values for geological disaster prevention and mitigation in deep tunnel engineering.
    結題摘要

    成果

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