本文關(guān)鍵詞： 多孔介質(zhì) 水泥類漿液 深層滲濾 注漿機理 工程應用　出處：《山東大學》2014年博士論文　論文類型：學位論文

【摘要】：注漿技術(shù)是巖土工程中一門專業(yè)性很強的學術(shù)分支,通過注漿材料的充填和膠結(jié)作用實現(xiàn)對受注地層的加固和堵水目的,改善其水文地質(zhì)和工程地質(zhì)條件,廣泛應用于隧道、礦山、水電站等地下工程的特殊地質(zhì)災害治理,并取得了良好的治理效果。伴隨著注漿技術(shù)的廣泛應用,注漿理論、施工技術(shù)和注漿材料的研究和應用迅速發(fā)展,注漿材料的種類日趨多樣化,性能也千差萬別。其中水泥類漿液是指以水泥為主體的注漿材料,主要包括普通水泥漿液、水泥-水玻璃漿液和水泥基高聚物改性漿液等,由于價格低廉、環(huán)保無毒等優(yōu)點仍然被廣泛采用。 普通水泥漿液,屬于顆粒型漿液,本文針對水泥漿液多孔介質(zhì)滲透研究較少的滲濾效應展開研究,主要研究其在滲透擴散過程中的深層滲濾(deep bed filtration)現(xiàn)象針對水泥類漿液首先分析了水泥漿液在多孔介質(zhì)中的可注性,重點分析了水泥漿液顆粒的表層滲濾現(xiàn)象和介質(zhì)內(nèi)部深層滲濾現(xiàn)象。開展了漿液顆粒表層滲濾試驗,研究了多孔介質(zhì)孔隙直徑、漿液水灰比和注漿壓力三個因素對水泥漿液的表層滲濾的影響,根據(jù)試驗結(jié)果,通過回歸分析得到了恒壓注漿時注漿量與多孔介質(zhì)孔隙直徑、漿液濃度和注漿壓力之間的函數(shù)關(guān)系；選取混合粒徑的砂樣開展了一維長柱型滲透試驗,研究了考慮深層滲濾效應時注漿過程中的滲流壓力的時變規(guī)律,分析了深層滲濾效應對注漿效果的影響,推導了多孔介質(zhì)注漿深層滲濾理論,采用兩個假設,F(σ)=1和漿液濃度c為常數(shù),結(jié)合試驗結(jié)果,對注漿過程中的壓力變化進行了理論分析,通過對比分析驗證了兩個假設的合理性。在此滲濾效應研究的基礎(chǔ)上,將可注性劃分為三個階段,分析了不同階段內(nèi)漿液顆粒的滲濾效應對注漿機理的影響。 研發(fā)了三維注漿模型試驗架,開展了水泥漿液的砂體注漿滲透試驗,通過監(jiān)測系統(tǒng)對注漿過程中的滲流壓力和土壓力進行了監(jiān)測,獲得了兩個參數(shù)隨時間的變化規(guī)律。注漿結(jié)束后通過清除模型填充體分析了漿液在砂層內(nèi)的注漿擴散特征,對不同位置處的注漿結(jié)石體進行取芯并測試了其抗壓強度,得到了抗壓強度在水平面上的分布規(guī)律。 結(jié)合中梁山隧道角礫巖破碎帶高壓大流量涌水治理工程,對不同注漿材料的力學性能、粘度性能、施工可控性、涌水封堵性能和圍巖穩(wěn)定性等方面進行了評價分析,對注漿材料的注漿性能進行了綜合評價,對類似工程具有一定的借鑒意義。
[Abstract]:Grouting technology is a highly specialized branch of geotechnical engineering. Through the filling and cementation of grouting materials, the purpose of strengthening and plugging the injected strata is realized, and the hydrogeological and engineering geological conditions are improved. It is widely used in underground engineering such as tunnels, mines, hydropower stations and other special geological disaster treatment, and achieved good results. With the wide application of grouting technology, grouting theory. The research and application of construction technology and grouting materials are developing rapidly. The types of grouting materials are becoming more and more diversified, and the properties of grouting materials are very different. Among them, cement slurry is the grouting material with cement as the main body. It mainly includes ordinary cement slurry, cement-water glass slurry and cement-based polymer modified slurry. It is widely used because of its low price, environmental protection and non-toxicity. Ordinary cement slurry belongs to granular slurry. In this paper, the percolation effect of cement slurry porous media is studied. The phenomenon of deep bed filationof cement slurry in the process of permeation and diffusion was studied. Firstly, the injectability of cement slurry in porous media was analyzed. The surface percolation phenomenon of cement slurry particles and the deep percolation phenomenon inside the medium were analyzed emphatically. The surface percolation test of slurry particles was carried out, and the pore diameter of porous media was studied. The effects of water cement ratio and grouting pressure on the surface infiltration of cement slurry were studied. According to the test results, the quantity of grouting and pore diameter of porous media were obtained by regression analysis. The functional relationship between grouting concentration and grouting pressure; One-dimensional long column permeation test was carried out with sand samples with mixed particle size. The time-varying law of seepage pressure in the grouting process was studied when the deep infiltration effect was considered, and the influence of the deep infiltration effect on the grouting effect was analyzed. In this paper, the theory of deep infiltration in porous media is derived. The pressure variation during grouting is theoretically analyzed by using two hypotheses (蟽 F-1 and slurry concentration c) as constants and combined with the experimental results. On the basis of the study of the percolation effect, the injectability is divided into three stages, and the influence of the infiltration effect of the slurry particles on the grouting mechanism in different stages is analyzed. A three-dimensional grouting model test stand was developed and the sand body grouting permeability test of cement slurry was carried out. The seepage pressure and earth pressure during grouting process were monitored by monitoring system. At the end of grouting, the grouting diffusion characteristics of slurry in sand layer were analyzed by removing the filling body of the model. The core of grouting stone at different locations was taken and its compressive strength was tested. The distribution of compressive strength in horizontal plane was obtained. Combined with the treatment project of high pressure and large discharge water inrush in the breccia breakage zone of Zhongliangshan Tunnel, the mechanical properties, viscosity properties and construction controllability of different grouting materials are studied. The water gushing plugging performance and surrounding rock stability are evaluated and analyzed, and the grouting performance of grouting materials is comprehensively evaluated, which has certain reference significance for similar projects.
【學位授予單位】：山東大學
【學位級別】：博士
【學位授予年份】：2014
【分類號】：TU472

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