2.16萬字               49頁

摘要

     隨著我國的高速公路、隧道建設(shè)，以及水庫慢慢老化，很多類似工程都亟需經(jīng)濟、有效并且環(huán)保的維護方法，注漿技術(shù)就是其中的一種。原有的注漿技術(shù)存在基層質(zhì)量不過關(guān)，壓實度不足、松散或者空洞等現(xiàn)象，使得維護效果不好，并且耗費人力財力，施工時間也比較漫長，對建筑工程的正常使用影響很大。高聚物注漿技術(shù)不僅可以加強破壞區(qū)域的牢固性，而且施工時間短，對日常行車造成的影響不大，同時高聚物注漿技術(shù)使用的材料比較環(huán)保，不會對環(huán)境造成污染，而且可以在很大程度上節(jié)省道路維修的支出，很有應(yīng)用前景。本文作者在閱讀總結(jié)前人研究成果的基礎(chǔ)上，對高聚物注漿技術(shù)的形成和發(fā)展進行深入研究，在室內(nèi)通過自行制備黑白料配比、高聚物與人工堆石料質(zhì)量比不同的試驗試樣，利用應(yīng)變控制式三軸儀，從應(yīng)力應(yīng)變關(guān)系和剪切強度等方面進行分析，研究高聚物注漿人工堆石料中高聚物含量和高聚物黑白料配比對試樣剪切強度、延性、內(nèi)摩擦角和粘聚力的影響規(guī)律。本文的研究工作主要集中在一下幾個方面：

1.相同的圍壓下，質(zhì)量比越高的試樣，表現(xiàn)出更高的抗剪性能，并且具有相對較好的延性，說明高聚物含量的適度增加可以改善堆石料的抗剪性能。

2.相同的質(zhì)量比下，黑料的含量相對含量越高，強度增長的越高，同時因為試樣有硬化的現(xiàn)象，所以試樣的延性變差了，與之相反的是，白料的相對含量提高，使得強度反而有小幅度的下降，但是延性明顯改良，因為白料增多使得試樣軟化。強度的變化均可以從內(nèi)摩擦力和粘聚力的方面來進行解釋。

3.高聚物注漿人工堆石料壓縮強度隨圍壓的增加而增大，存在明顯的平緩段和壓密段，圍壓為100 kPa、200 kPa時，應(yīng)力應(yīng)變關(guān)系曲線現(xiàn)狀均相似，屬于應(yīng)變硬化型，過了曲線的平直段后，隨軸向應(yīng)變的增加，豎直應(yīng)力也會增加，當然隨著圍壓的增大，豎直應(yīng)力的增加也越明顯，同時應(yīng)變硬化特征越明顯。

4.黏聚力雖然有波動但是隨著黑白料配比和質(zhì)量比的變大總趨勢是變大的，兩者之間呈指數(shù)函數(shù)變化。內(nèi)摩擦角隨著黑白料配比的變大則表現(xiàn)出了十分明顯的線性變化，但是質(zhì)量比的改變對其影響不大。

關(guān)鍵詞：聚氨酯；人工堆石料；質(zhì)量比；黑白料配比

 

ABSTRACT

With Chinese construction of highway and tunnel, and the slowly aging of reservoir, a lot of similar projects are in urgent need of economic, effective and environmentally friendly maintenance methods. Grouting technique is one of them. The existing grouting technique has phenomena of the poor quality of the basic level, the insufficient degree of compaction, loose or empty and so on, which make a poor maintenance effect. At the same time, huge human resources and long construction time make great impact on the normal use of building construction. Polymer injection technology can not only strengthen the fastness of the broken region, but also has a short construction time, which makes little influence on daily traffic. In the meantime polymer injection technology used in the material which is more environmentally friendly, and will not pollute the environment and cut the expense on road maintenance, so it has a promising future. Based on the summary of previous studies, the author of this paper does deep research on the formation and development of polymer grouting technology. Making test samples differ in the mass ratio of polymer and artificial rockfill and the ratio of black and white material on my own. Under a certain confining pressure step, using strain controlled three axis meter to do the experiment. Analysing in the aspects of stress-strain relationship and shear strength, etc. Studying which effect law the mass ratio of polymer and artificial rockfill and the ratio of black and white material put on the shear strength, ductility, internal friction angle and cohesive force. The main research work of this paper is focused on following several aspects:

1.Making test samples differ in the mass ratio of polymer and artificial rockfill and the ratio of black and white material on my own and setting conditions on the mass ratio of polymer and artificial rockfill, the ratio of black and white material and the time of disassembly. Making good control of every samples’ mass.

2.Setting the ratio of black and white material on 1: 1 and changing the mass ratio of polymer and artificial rockfill to set up control group. Under a stable confining pressure, the motor lifts the sample slowly and makes it compressed.  Recording vertical axis of the sample displacement and ring readings within their means, and observe the deformation of the sample. When the peak intensity appears or vertical axial displacement reaches a height of 20% of the sample, the test ends. Then changing the confining pressure, do the next set of tests. Fixing the mass ratio of polymer and artificial rockfillthe on 1:1 and changing the ratio of black and white material on 1: 1 to set up control group. Repeating the steps.

3.Processing obtained data and drawing stress-strain curve and strength envelope, Analysing results from two aspects of the stress-strain relationship and shear strength , the mass ratio and the ratio of black and white material impact on the sample, and try to explain experimental phenomena from internal friction and stick cohesion.

4.Analysis of confining pressure on the strength of the sample, which can be also called lateral impact on the sample. By changing the description of the slope and curvature of the curve for the stress analysis of hardening or softening stress. And try to explain a sample test conclusions from the interaction between the particles inside.

Key words: polyurethane; artificial rockfill; mass ratio; ratio of black and white materials