本文選題：加筋土擋墻 + 土工格柵��； 參考：《浙江大學(xué)》2013年碩士論文

【摘要】：筋材的設(shè)計(jì)計(jì)算是加筋土擋墻設(shè)計(jì)中重要組成部分之一。擋墻中筋材的影響因素眾多,如墻高、超載、面板剛度、土體自重、施工碾壓、擋墻傾斜角度和加筋間距等。 結(jié)合某一生態(tài)加筋土擋墻工程,選擇典型斷面,對(duì)斷面中8層土工格柵進(jìn)行了應(yīng)變測(cè)試,分析筋材變形隨施工過(guò)程的變化規(guī)律。 基于某室內(nèi)加筋土擋墻模型試驗(yàn),應(yīng)用有限元軟件plaxis進(jìn)行數(shù)值模擬,分析比較了墻面板位移、腳趾水平和垂直力、基底垂直土壓力、筋材應(yīng)變等的實(shí)測(cè)結(jié)果和模擬結(jié)果,結(jié)果顯示兩者能較好吻合。并且分析了不同土體模型對(duì)數(shù)值模擬結(jié)果的影響。 對(duì)現(xiàn)場(chǎng)實(shí)測(cè)的加筋土擋墻,利用二維有限元程序plaxis進(jìn)行數(shù)值模擬,分析了邊坡變形特征、土中應(yīng)力分布、土工格柵應(yīng)變、剪切帶分布等。用強(qiáng)度折減法研究了邊坡破壞時(shí)的滑動(dòng)面,分析了計(jì)算中考慮反包段對(duì)擋墻位移及土工格柵拉力等的影響。 統(tǒng)計(jì)分析了不同類(lèi)型土體碾壓所產(chǎn)生的土工格柵應(yīng)變值。對(duì)現(xiàn)場(chǎng)實(shí)測(cè)、以及按現(xiàn)行設(shè)計(jì)方法和有限元數(shù)值模擬得到的擋墻土工格柵各層拉力進(jìn)行了比較,進(jìn)而提出了考慮碾壓影響的加筋土擋墻筋材設(shè)計(jì)方法。
[Abstract]:The design and calculation of reinforced earth retaining wall is one of the important parts. There are many factors affecting the reinforcement in the retaining wall, such as the height of the wall, overload, the stiffness of the slab, the weight of the soil, the compaction of the construction, the inclined angle of the retaining wall and the spacing of the reinforcement, etc. Combined with a certain ecological reinforced earth retaining wall, the typical section is selected. The strain of 8 layers geogrid in the section is tested, and the deformation of reinforced concrete with the construction process is analyzed. Based on the model test of reinforced earth retaining wall in a certain room, the finite element software plaxis is used to carry out numerical simulation, and the displacement of wall panel is analyzed and compared. The measured and simulated results of the toe horizontal and vertical forces, the vertical earth pressure of the base and the strain of the steel bar show that the two results are in good agreement with each other. The effects of different soil models on the numerical simulation results are analyzed. The deformation characteristics of slope, stress distribution in soil, geogrid strain and strain of geogrid are analyzed by using two-dimensional finite element program plaxis. Distribution of shear bands, etc. The sliding surface of slope failure is studied by using strength reduction method, and the influence of anti-envelope section on the displacement of retaining wall and the force of geogrid tension is analyzed. The strain values of geogrid caused by different types of soil are statistically analyzed. The field measurements and the tensile forces of the geogrid layers obtained by the current design method and the finite element numerical simulation are compared, and the design method of reinforced earth retaining wall reinforcement material considering the effect of roller compaction is put forward.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類(lèi)號(hào)】：TU476.4

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本文編號(hào)：2001930