本文關(guān)鍵詞： 被動(dòng)土壓力 土拱效應(yīng) 平移模式 位移場 土壓力系數(shù)　出處：《太原理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：1978年改革開放之后，尤其是20世紀(jì)中后期，我國的現(xiàn)代化經(jīng)濟(jì)飛速發(fā)展，伴隨著這種快速發(fā)展，工程領(lǐng)域中的基礎(chǔ)設(shè)施以及一些大型的重點(diǎn)工程項(xiàng)目也在熱風(fēng)熱浪的進(jìn)行著。其范圍涉及市政工程、建筑工程、機(jī)電工程、公路工程、橋梁工程、鐵路工程以及水利工程等多個(gè)領(lǐng)域。其中以公路、水利以及鐵路取得的成就最為令人為矚目。這三大基礎(chǔ)工程領(lǐng)域往往需要穿山越嶺，這就使得擋土墻越來越多的出現(xiàn)在工程建設(shè)中。 本文以水平位移下的剛性擋土墻作為研究對(duì)象，通過有限元軟件ANSYS數(shù)值解析擋土墻后土體被動(dòng)非極限狀態(tài)下的相對(duì)位移區(qū)，以及相對(duì)位移區(qū)中的土拱效應(yīng)，并且研究土拱形狀、性質(zhì)，結(jié)合水平微分單元分析法研究非極限狀態(tài)下被動(dòng)土壓力的大小、分布等。本文的研究工作如下： （1）擋土墻向土體方向發(fā)生一定水平位移，土體處于非極限狀態(tài)時(shí)，墻后回填土體存在相對(duì)位移區(qū)，該區(qū)形狀為倒梯形。相對(duì)位移區(qū)范圍大小受到墻體位移、回填土體內(nèi)摩擦角及回填土體彈性模量等因素的影響。墻體位移增大，，相對(duì)位移區(qū)范圍增大；回填土體內(nèi)摩擦角增大，相對(duì)位移區(qū)范圍減��；回填土體彈性模量增大，相對(duì)位移區(qū)范圍增大。 （2）擋土墻后非極限狀態(tài)被動(dòng)土壓力受到墻體位移、回填土體內(nèi)摩擦角及回填土體彈性模量等影響。隨著墻體位移和回填土體內(nèi)摩擦角的增大，被動(dòng)土壓力增大，總土壓力力增大，合力作用點(diǎn)降低。 （3）就剛性擋土墻以平移模式擠壓土體情況下，數(shù)值研究被動(dòng)非極限狀態(tài)大主應(yīng)力軌跡線——大主應(yīng)力拱拱曲線是一條以e為底的指數(shù)曲線。大主應(yīng)力土拱曲線受到墻體位移及墻后填土中內(nèi)摩擦角的影響。墻體位移增大，土拱曲線曲率增大，曲線越彎曲；填土內(nèi)摩擦角增大，土拱曲線曲率減小，曲線越平緩。 （4）利用被動(dòng)非極限狀態(tài)下的土拱曲線，分析得到擋土墻非極限狀態(tài)的被動(dòng)土壓力系數(shù)。結(jié)合水平層分析法，建立擋土墻非極限狀態(tài)下被動(dòng)土壓力分布、合力大小及其作用點(diǎn)的計(jì)算理論。
[Abstract]:After the reform and opening up in 1978, especially in the middle and late period of 20th century, the modern economy of our country developed rapidly, which was accompanied by this rapid development. Infrastructure in the field of engineering and a number of large key engineering projects are also under way in hot wind and heat waves. Their scope covers municipal engineering, building engineering, mechanical and electrical engineering, highway engineering, bridge engineering, Railway engineering and water engineering, among them, highway, water and railway achievements are most remarkable. These three basic engineering areas often need to cross mountains and mountains. This makes the retaining wall more and more appear in the engineering construction. In this paper, the rigid retaining wall under horizontal displacement is taken as the research object, and the relative displacement region of the soil in the passive non-limit state and the soil arch effect in the relative displacement zone are analyzed by the finite element software ANSYS. And the shape and properties of soil arch are studied, and the size and distribution of passive earth pressure in non-limit state are studied by using horizontal differential unit analysis. The research work in this paper is as follows:. 1) the retaining wall has a certain horizontal displacement to the soil. When the soil is in the non-limit state, there is a relative displacement area in the backfill soil, and the shape of the backfill soil is inverted trapezoid, and the relative displacement range is affected by the wall displacement. The wall displacement increases, the relative displacement range increases, the friction angle increases, the relative displacement region decreases, and the elastic modulus of backfill soil increases. The range of relative displacement region increases. 2) the passive earth pressure behind the retaining wall is affected by the wall displacement, the friction angle of the backfill and the elastic modulus of the backfill soil. With the increase of the displacement of the wall and the friction angle of the backfill, the passive earth pressure increases. The total earth pressure increases and the joint action point decreases. (3) in the case of the rigid retaining wall squeezing the soil in a translational mode, Numerical study on the trajectory of large principal stress in passive non-limit state the curve of large principal stress arch arch is an exponential curve based on e. The large principal stress soil arch curve is affected by the wall displacement and the internal friction angle in the backfill of the wall, and the wall displacement increases. The curvature of soil arch curve increases, the curve is more curved, and the curvature of soil arch curve decreases with the increase of friction angle of filling soil, and the curve is more gentle. 4) the passive earth pressure coefficient of the retaining wall in the non-limit state is obtained by using the soil arch curve in the passive non-limit state, and the distribution of the passive earth pressure in the non-limit state of the retaining wall is established by combining the horizontal layer analysis method. The calculation theory of force and its point of application.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU476.4;TU432

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 吳明;彭建兵;徐平;孫苗苗;夏唐代;;考慮土拱效應(yīng)的擋墻后土壓力研究[J];工程力學(xué);2011年11期

2 王謂漳;;打樁工程述評(píng)[J];國外公路;1982年04期

3 顧長存,陸海源,劉漢龍,高玉峰,周云東;不同變位模式下?lián)跬翂Ρ粍?dòng)土壓力的計(jì)算與分析[J];河海大學(xué)學(xué)報(bào)(自然科學(xué)版);2005年04期

4 朱大勇,周早生,錢七虎;土體主動(dòng)滑動(dòng)場及主動(dòng)土壓力的計(jì)算[J];計(jì)算力學(xué)學(xué)報(bào);2000年01期

5 張文戈;擋土墻的庫侖土壓力[J];力學(xué)與實(shí)踐;1997年05期

6 兌關(guān)鎖,左曉寶;庫侖土壓力與破裂角公式的各種等價(jià)形式[J];南京理工大學(xué)學(xué)報(bào);1999年03期

7 李瑩,杜志友,張海森;有限元法在渾河閘鋼閘門安全檢測(cè)中的應(yīng)用[J];水利電力機(jī)械;2005年05期

8 李永剛,白鴻莉;垂直墻背擋土墻土壓力分布研究[J];水利學(xué)報(bào);2003年02期

9 奚肖亞;劉海祥;葉小強(qiáng);柯敏勇;;劃子口河閘弧形鋼閘門三維有限元分析與安全評(píng)估[J];水利水運(yùn)工程學(xué)報(bào);2012年05期

10 楊樹耕，孟昭瑛;有限元法在三盛公攔河閘安全水頭研究中的應(yīng)用[J];人民黃河;1994年10期

本文編號(hào)：1521739