本文關(guān)鍵詞： 底渣 底渣加筋土 三向格柵 土工格室 三軸試驗(yàn)　出處：《湖北工業(yè)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：垃圾焚燒底渣是城市生活垃圾在經(jīng)過了焚燒處理后所得到的混合灰渣,經(jīng)過分離處理除去飛灰后所剩下的固體殘余物。論文以底渣加筋土作為研究對(duì)象,擬將其作為路基填料。在大量的試驗(yàn)與實(shí)地調(diào)研的情況下,著重分析了不同筋材加筋后,得到了底渣加筋土的強(qiáng)度和變形特性,主要研究內(nèi)容如下:對(duì)底渣進(jìn)行了篩分試驗(yàn)和擊實(shí)試驗(yàn)得到了底渣的基本物理性質(zhì),通過歸納和總結(jié)發(fā)現(xiàn)底渣從粒徑上說是粗粒土,與沙土的相似度很高,并得到了底渣的最優(yōu)含水率和最大干密度。通過大型直剪試驗(yàn)、壓縮試驗(yàn)、大型三軸試驗(yàn),得到了底渣的壓縮模量、壓縮指數(shù)以及c、φ值。利用大型三軸固結(jié)排水試驗(yàn)對(duì)分別對(duì)格柵加筋底渣和格室加筋底渣進(jìn)行了研究,得到了不同加筋底渣在不同σ3的條件下的應(yīng)力—應(yīng)變曲線。通過對(duì)曲線進(jìn)行分析,分析每種圍壓下曲線的走勢(shì)計(jì)算出了不同σ3的條件下各曲線的峰值,得出結(jié)論:對(duì)格柵加筋底渣而言,加筋的層數(shù)n和布筋間距都對(duì)加筋效果產(chǎn)生影響,通過對(duì)比試驗(yàn)分析出主要影響和次要影響,并利用試驗(yàn)得到了格柵的最優(yōu)布筋層數(shù)。利用大型三軸固結(jié)排水試驗(yàn)對(duì)格室加筋底渣進(jìn)行了研究,得到了在三種工況下,格室加筋底渣的應(yīng)力-應(yīng)變曲線,當(dāng)加筋層數(shù)n和格室高度h作為參數(shù)時(shí),格室加筋底渣的應(yīng)力-應(yīng)變關(guān)系,通過對(duì)曲線的分析,分析在每種圍壓下曲線的走勢(shì),計(jì)算出了不同σ3的條件下各曲線的峰值。并依靠對(duì)比試驗(yàn)得出結(jié)論;格室高度h是影響格室加筋底渣加筋效果的最主要因素。最后從三個(gè)角度對(duì)兩種筋材的加筋效果進(jìn)行了對(duì)比:依據(jù)應(yīng)力應(yīng)變曲線,通過軟件計(jì)算,得到了破壞點(diǎn)強(qiáng)度,從破壞點(diǎn)強(qiáng)度的角度進(jìn)行了對(duì)比;根據(jù)不同加筋土在各種工況下的破壞點(diǎn)強(qiáng)度,得到p-q曲線,通過線性擬合得到線性回歸方程和總離差平方和,通過計(jì)算得到加筋土的c和φ值,從c、φ值的角度進(jìn)行了對(duì)比;引入加筋效果系數(shù),利用不同工況下的加筋效果下屬對(duì)土工格柵和土工格室兩種加筋材料進(jìn)行對(duì)比。最終發(fā)現(xiàn),高度較高的格室加筋效果最優(yōu)。土工格柵和土工格室兩種材料,其實(shí)分別代表著平面加筋材料和三維立體加筋材料。由此可見研究立體材料的加筋是以后選擇筋體的主要方向。
[Abstract]:MSW incineration slag is a mixture of MSW after incineration treatment, which is a solid residue after separating and removing fly ash. In this paper, the reinforced soil of MSW is taken as the research object. It is intended to be used as subgrade filler. Based on a large number of tests and field investigations, the strength and deformation characteristics of reinforced soil with different reinforcement materials are obtained. The main research contents are as follows: the basic physical properties of the bottom slag are obtained by sieving and compacting tests. It is found that the bottom slag is coarse grained soil from the particle size and has a high similarity with sandy soil. The optimum moisture content and maximum dry density of bottom slag are obtained. Through large direct shear test, compression test and large triaxial test, the modulus of compression, compression index and c of bottom slag are obtained. 蠁 value. The reinforcement bottom slag of grid and the reinforced bottom slag of lattice chamber were studied by means of large scale triaxial consolidation and drainage test. The stress-strain curves of different reinforced bottom slag under different 蟽 _ 3 conditions are obtained. By analyzing the curves, the peak values of each curve under different 蟽 _ 3 conditions are calculated by analyzing the trend of the curves under different confining pressures. Conclusion: for the grille reinforced bottom slag, the reinforcement layer number n and the spacing of the reinforcement have an effect on the reinforcement effect, and the main influence and the secondary effect are analyzed through the comparative test. The optimum reinforcement layer number of grid is obtained by experiment. The stress strain curve of reinforced bottom slag of lattice chamber under three conditions is obtained by using large scale triaxial consolidation and drainage test. When the reinforcement layer number n and the height h of the lattice chamber are taken as parameters, the stress-strain relationship of the reinforced bottom slag of the lattice chamber is analyzed. Through the analysis of the curve, the trend of the curve under each kind of confining pressure is analyzed. The peak values of the curves under different 蟽 3 conditions are calculated, and the conclusions are obtained by the contrast test. Lattice height h is the most important factor affecting the reinforcement effect of the reinforced bottom slag. Finally, the reinforcement effect of the two kinds of reinforced material is compared from three angles: according to the stress-strain curve, the software is used to calculate the reinforcement effect. The failure point strength is obtained and compared from the point of view of failure point strength. According to the strength of the failure point of the reinforced soil under various conditions, the p-q curve is obtained, the linear regression equation and the sum of the total deviation square are obtained by linear fitting, and the values of c and 蠁 of the reinforced soil are calculated from c. The angle of 蠁 value is compared. The reinforcement effect coefficient is introduced and the geogrid and geogrid are compared with the geogrid and the geogrid under different working conditions. Finally, the results are found. The geogrid and geogrid are two kinds of materials. In fact, it represents the plane stiffened material and the three-dimensional solid reinforced material, which shows that the research on the reinforcement of the three-dimensional material is the main direction of the later selection of the stiffened body.
【學(xué)位授予單位】：湖北工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：X799.3;TU43

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