本文選題：膨脹土　切入點(diǎn)：路塹高邊坡　出處：《南昌工程學(xué)院》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著國(guó)家經(jīng)濟(jì)和交通運(yùn)輸業(yè)的發(fā)展,高速公路的建設(shè)也從城市向偏遠(yuǎn)山區(qū)發(fā)展,無(wú)疑會(huì)遇到很多路塹邊坡的穩(wěn)定性問(wèn)題。膨脹土具有脹縮性、裂隙性、強(qiáng)度衰減等特點(diǎn),導(dǎo)致膨脹土邊坡比一般邊坡更易產(chǎn)生滑坡。本文針對(duì)膨脹土特殊的工程特性,對(duì)膨脹土路塹邊坡滑坡機(jī)理進(jìn)行了分析,并以江西萬(wàn)宜高速公路的某一膨脹土路塹高邊坡為工程背景,對(duì)錨桿框架梁加固膨脹土路塹邊坡的穩(wěn)定性進(jìn)行了數(shù)值計(jì)算分析,還對(duì)框架梁支護(hù)參數(shù)進(jìn)行了優(yōu)化研究,同時(shí)對(duì)考慮降雨和裂隙耦合作用下的膨脹土邊坡穩(wěn)定性進(jìn)行了研究。本文主要工作如下:1.膨脹土邊坡滑坡機(jī)理和特點(diǎn)分析。通過(guò)總結(jié)國(guó)內(nèi)外對(duì)膨脹土邊坡的滑坡機(jī)理的研究,闡述了裂隙的產(chǎn)生和發(fā)展是影響膨脹土邊坡滑坡的關(guān)鍵因素,歸納總結(jié)膨脹土邊坡滑坡特點(diǎn)及各加固方案的適用性。2.錨桿框架梁加固土質(zhì)邊坡受力分析�；诮缑孳浕瑒�(dòng)力學(xué)模型假定,建立錨桿受力變形階段的位移、軸力的微分表達(dá)式,并通過(guò)數(shù)學(xué)推導(dǎo)獲取方程解析解。按照建筑基礎(chǔ)的方法考慮計(jì)算框架梁內(nèi)力的3種計(jì)算模型,闡述了各種模型的基本理論及不足。3.工程邊坡膨脹土力學(xué)參數(shù)試驗(yàn)。對(duì)萬(wàn)宜高速公路A2標(biāo)段某膨脹土路塹邊坡進(jìn)行了現(xiàn)場(chǎng)原位取土,在實(shí)驗(yàn)室進(jìn)行了膨脹土三軸剪切、三軸滲透等試驗(yàn),得到了膨脹土相關(guān)的力學(xué)參數(shù)。4.錨桿框架梁加固膨脹土路塹邊坡穩(wěn)定性數(shù)值計(jì)算及支護(hù)參數(shù)優(yōu)化研究。采用有限差分方法對(duì)錨桿框架梁加固膨脹土路塹多級(jí)邊坡的穩(wěn)定性進(jìn)行了數(shù)值模擬分析,對(duì)錨桿框架梁支護(hù)參數(shù)(如錨桿間距、長(zhǎng)度以及布設(shè)角度等)進(jìn)行了優(yōu)化研究,為工程設(shè)計(jì)提供了理論依據(jù)。5.降雨和裂隙耦合作用下膨脹土邊坡穩(wěn)定性影響分析。采用有限元分析(seep/w)與極限平衡分析(slope/w)相結(jié)合的方法,對(duì)降雨和裂隙耦合作用引起的膨脹土邊坡滲流場(chǎng)變化與邊坡穩(wěn)定性進(jìn)行了研究。在此基礎(chǔ)上,對(duì)錨桿支護(hù)膨脹土路塹邊坡的穩(wěn)定性進(jìn)行了評(píng)價(jià),驗(yàn)證了錨桿支護(hù)膨脹土邊坡的可靠性。
[Abstract]:With the development of national economy and transportation industry, the construction of freeway is also developing from city to remote mountain area, which will undoubtedly encounter many problems of stability of cutting slope. Expansive soil is characterized by dilatancy and shrinkage, fissure, strength attenuation, etc. In this paper, the landslide mechanism of expansive soil cutting slope is analyzed according to the special engineering characteristics of expansive soil. Taking a high expansive soil cutting slope of Wanyi Expressway in Jiangxi Province as the engineering background, the stability of expansive soil cutting slope strengthened by anchor frame beam is numerically calculated and analyzed, and the parameters of frame beam support are optimized. At the same time, the stability of expansive soil slope considering the coupling of rainfall and crack is studied. The main work of this paper is as follows: 1. The landslide mechanism and characteristics of expansive soil slope are analyzed, and the landslide mechanism of expansive soil slope at home and abroad is summarized. It is expounded that the occurrence and development of cracks are the key factors affecting the landslide of expansive soil slope. The characteristics of expansive soil slope landslide and the applicability of each reinforcement scheme are summarized. 2. The stress analysis of soil slope strengthened by anchor frame beam. Based on the assumption of dynamic model of interface softening and sliding, the displacement of anchor rod in deformation stage is established. The differential expression of axial force and the analytical solution of the equation are obtained by mathematical derivation. According to the method of building foundation, three kinds of calculation models for calculating internal force of frame beam are considered. The basic theory and deficiency of various models are expounded. 3. Test of expansive soil mechanical parameters of engineering slope. The in-situ sampling of expansive soil cutting slope in A 2 section of Wanyi Expressway is carried out, and triaxial shear of expansive soil is carried out in laboratory. Triaxial permeation test, The mechanical parameters related to expansive soil. 4. Numerical calculation of stability of expansive soil cutting slope strengthened with anchor frame beam and optimization of supporting parameters are obtained. Finite difference method is used to reinforce expansive soil cutting multi-stage slope with anchor frame beam. Numerical simulation analysis of the stability of the. In this paper, the support parameters (such as bolt spacing, length and placement angle) of bolting frame beam are optimized. The paper provides a theoretical basis for engineering design. 5. Stability analysis of expansive soil slope under the coupling of rainfall and fracture. The method of combining finite element analysis with limit equilibrium analysis is used to analyze the stability of expansive soil slope. The seepage field variation and slope stability of expansive soil slope caused by the coupling of rainfall and crack are studied. On this basis, the stability of expansive soil cutting slope supported by bolt is evaluated. The reliability of the expansive soil slope supported by bolt is verified.
【學(xué)位授予單位】：南昌工程學(xué)院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U416.167

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 涂美珍;張正雄;任超;;公路邊坡穩(wěn)定性分析與防護(hù)方法綜述[J];西部交通科技;2015年07期

2 劉興遠(yuǎn);;坡率法邊坡實(shí)例分析[J];重慶建筑;2015年06期

3 王建國(guó);高全臣;常慶;付涵露;王洪波;汪浩浩;;高陡邊坡削幫減載技術(shù)優(yōu)化[J];遼寧工程技術(shù)大學(xué)學(xué)報(bào)(自然科學(xué)版);2015年04期

4 林杭;鐘文文;熊威;唐雯鈺;曹平;;錨桿長(zhǎng)度與邊坡坡率對(duì)最優(yōu)錨固角的影響[J];巖土工程學(xué)報(bào);2014年S2期

5 于洋;孫紅月;尚岳全;;錨固深度對(duì)雙排抗滑樁力學(xué)性能影響[J];巖石力學(xué)與工程學(xué)報(bào);2013年10期

6 徐乾;張永興;陳建功;;錨桿參數(shù)對(duì)錨固邊坡抗震性能影響研究[J];巖土力學(xué);2013年S1期

7 楊義輝;唐樹(shù)名;;基于傳遞系數(shù)法的邊坡穩(wěn)定性分析[J];北方交通;2013年07期

8 拜亞南;周大全;唐承耀;吳臻林;趙立廷;雷宇;;蒙特卡洛概率分析法在高邊坡穩(wěn)定計(jì)算中的應(yīng)用[J];路基工程;2013年03期

9 汝佧;易發(fā)成;張洪;;基于模糊數(shù)學(xué)法的工程類比法在邊坡治理中的研究與應(yīng)用[J];長(zhǎng)春工程學(xué)院學(xué)報(bào)(自然科學(xué)版);2013年01期

10 闕云;姚曉琴;陳祖鑫;林登輝;;福建非飽和花崗巖殘積土強(qiáng)度特性的試驗(yàn)研究[J];公路;2012年06期

相關(guān)博士學(xué)位論文 前2條

1 丁金華;膨脹土邊坡淺層失穩(wěn)機(jī)理及土工格柵加固處理研究[D];浙江大學(xué);2014年

2 吳禮舟;非飽和膨脹土的本構(gòu)模型及在邊坡穩(wěn)定性評(píng)價(jià)中的應(yīng)用[D];成都理工大學(xué);2006年

相關(guān)碩士學(xué)位論文 前7條

1 王葉嬌;降雨對(duì)膨脹土路塹邊坡的穩(wěn)定性影響分析[D];上海交通大學(xué);2013年

2 王立文;基于FLAC~(3D)的公路邊坡分級(jí)柔性支護(hù)數(shù)值模擬研究[D];蘭州理工大學(xué);2012年

3 郭銳劍;錨桿框架格梁固坡機(jī)理及其工程應(yīng)用研究[D];蘭州大學(xué);2012年

4 朱序華;有限元重度加大法在邊坡穩(wěn)定性分析中的應(yīng)用[D];西安科技大學(xué);2010年

5 劉靜德;膨脹力對(duì)膨脹土邊坡穩(wěn)定影響研究[D];長(zhǎng)江科學(xué)院;2010年

6 白雪峰;預(yù)應(yīng)力錨桿格構(gòu)梁的受力機(jī)理及設(shè)計(jì)方法研究[D];北京工業(yè)大學(xué);2009年

7 武海濤;膨脹土邊坡穩(wěn)定性及綜合治理研究[D];武漢理工大學(xué);2006年

，

本文編號(hào)：1556996