發(fā)布時間：2019-07-02 10:09

【摘要】：本文試驗研究了水泥漿液滲透注漿的擴散機理,主要包括兩個方面,一方面是在總結(jié)前人成果的基礎(chǔ)上,自主研制開發(fā)了可重復(fù)利用的滲透注漿模擬系統(tǒng),另一方面是利用研制的滲透注漿模擬系統(tǒng),模擬了不同水灰比的水泥漿液在砂層中滲透擴散的過程,并整理了注漿擴散半徑、沿程壓力耗散與注漿參數(shù)(漿液水灰比、砂層滲透系數(shù)、注漿壓力)之間的函數(shù)關(guān)系。自主開發(fā)研制的滲透注漿模擬系統(tǒng)包括了試驗主體系統(tǒng)、注漿系統(tǒng)、傳感器系統(tǒng)和測量系統(tǒng)四個部分,試驗的方案選擇了均勻試驗設(shè)計,研制的主要思路是保證滲透注漿模擬試驗?zāi)軌驕蚀_、方便、經(jīng)濟的進行。利用研制的模擬系統(tǒng)做了多次滲透注漿試驗,通過對試驗數(shù)據(jù)進行回歸分析得到了一系列的規(guī)律：(1)確定了滲透注漿擴散半徑與注漿壓力、砂層滲透系數(shù)、漿液水灰比之間的回歸關(guān)系,在影響擴散半徑的三種因素中,注漿壓力對擴散半徑的影響最大,滲透系數(shù)的影響其次,漿液水灰比的影響最小。(2)試驗得到的滲透注漿擴散半徑比理論推導(dǎo)的擴散半徑要小,主要是因為漿液具有粘度時變性的特點,理論公式中沒有考慮粘度的時變性。(3)在漿液擴散的范圍逐漸增大的過程中,注漿沿程壓力并不是隨著注漿距離的增加而均勻耗散的,而是在注漿點附近衰減的快,此后隨著距離注漿點位置增大,注漿壓力的衰減逐漸減緩,直到注漿壓力耗散為零；注漿沿程壓力的耗散前后差異很大,即沿程壓力的耗散曲線是呈現(xiàn)凹曲線型的。
[Abstract]:In this paper, the diffusion mechanism of cement slurry osmotic grouting is studied, which mainly includes two aspects. On the one hand, on the basis of summing up the previous achievements, a reusable osmotic grouting simulation system has been developed independently, on the other hand, the infiltration diffusion process of cement slurry with different water-cement ratio in sand layer has been simulated by using the developed osmotic grouting simulation system, and the grouting diffusion radius has been sorted out. The functional relationship between pressure dissipation and grouting parameters (slurry / water-cement ratio, permeability coefficient of sand layer, grouting pressure). The seepage grouting simulation system developed by ourselves includes four parts: test main system, grouting system, sensor system and measurement system. The uniform test design is selected for the test scheme. The main idea of the development is to ensure that the osmotic grouting simulation test can be carried out accurately, conveniently and economically. Several osmotic grouting tests have been carried out by using the developed simulation system, and a series of laws have been obtained through regression analysis of the test data: (1) the regression relationship between osmotic grouting diffusion radius and grouting pressure, sand layer permeability coefficient and slurry water-cement ratio is determined. among the three factors affecting diffusion radius, grouting pressure has the greatest influence on diffusion radius, followed by permeability coefficient. The effect of slurry water-cement ratio is the smallest. (2) the diffusion radius of permeable grouting obtained from the test is smaller than that deduced by theory, mainly because the slurry has the characteristics of viscosity time-varying and does not consider the time-varying viscosity in the theoretical formula. (3) in the process of gradually increasing the range of slurry diffusion, the grouting pressure along the grouting process is not uniformly dissipated with the increase of grouting distance, but decays quickly near the grouting point. After that, with the increase of the position from the grouting point, the attenuation of grouting pressure slows down gradually until the dissipation of grouting pressure is zero. There is a great difference between before and after the dissipation of grouting pressure, that is to say, the dissipation curve of grouting pressure is concave curve.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU472

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