【摘要】：采用注漿模擬試驗及理論分析研究了圍巖性質(zhì)對于注漿壓力變化規(guī)律及漿液擴散模式的影響。試驗采用在注漿模型架內(nèi)分區(qū)充填不同孔隙比土體的方法模擬被注圍巖顯著的向異性及非均質(zhì)性;采用多個注漿管依次注漿的方法模擬實際注漿工程中的不同注漿施工階段。通過開挖揭露漿脈(漿泡)特征研究圍巖性質(zhì)對于漿液擴散形式的影響;通過分析注漿過程中注漿壓力數(shù)據(jù)研究圍巖性質(zhì)對于注漿壓力的影響;通過對注漿前后圍巖試樣進行室內(nèi)試驗測試,獲取注漿對于圍巖孔隙比及壓縮系數(shù)的影響規(guī)律。研究結(jié)果證實:注漿壓力變化規(guī)律及漿液擴散模式與圍巖性質(zhì)密切相關(guān),通過分析注漿壓力變化規(guī)律與漿液擴散模式可判定圍巖性質(zhì),從而為注漿施工過程中的注漿參數(shù)動態(tài)調(diào)整提供依據(jù)。相關(guān)研究結(jié)論在永蓮隧道帷幕注漿工程中進行了現(xiàn)場試驗,進一步驗證了其正確性。
[Abstract]:The influence of surrounding rock properties on grouting pressure and slurry diffusion model was studied by grouting simulation test and theoretical analysis. In the experiment, the obvious anisotropy and heterogeneity of the surrounding rock are simulated by filling the soil with different void ratios in the grouting model frame, and the different grouting construction stages in the actual grouting engineering are simulated by the method of multiple grouting pipes in turn. The influence of surrounding rock property on grouting diffusion form is studied by excavation, and the influence of surrounding rock property on grouting pressure is studied by analyzing grouting pressure data. Through the laboratory test of surrounding rock samples before and after grouting, the influence of grouting on the porosity ratio and compression coefficient of surrounding rock is obtained. The results show that the variation of grouting pressure and the model of grouting diffusion are closely related to the properties of surrounding rock, and the characteristics of surrounding rock can be determined by analyzing the variation of grouting pressure and the model of grouting diffusion. It provides the basis for the dynamic adjustment of grouting parameters during grouting construction. The relevant research conclusions were tested in Yonglian tunnel curtain grouting project, and the correctness of the project was further verified.
【作者單位】： 山東大學巖土與結(jié)構(gòu)工程研究中心;
【基金】：國家自然科學基金青年科學基金項目(51309146);國家自然科學基金項目(41272385)
【分類號】：U451.2
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本文編號：2183490