【摘要】：本文以阿爾及利亞東西高速公路K131處由于施工開挖形成的高陡邊坡進行支擋結(jié)構(gòu)設計為依托，提出了一種新型的鋼筋混凝土擋土墻形式。本文根據(jù)歐洲規(guī)范，首先對擋土墻的外部穩(wěn)定性進行了計算，并利用有限元模擬現(xiàn)場工況，對各個工序中的擋土墻穩(wěn)定性進行分析，并根據(jù)有限元計算出的彎矩和剪力對擋土墻各個部位進行配筋設計。主要研究內(nèi)容和結(jié)論如下： 1）、擋土墻的設計尺寸擬定：擋土墻高度根據(jù)路肩高度與坡腳的高度差確定，并保證基礎埋深1.5m；椅子長度設置原則為：根據(jù)邊坡開挖現(xiàn)狀，為保證臨時邊坡的穩(wěn)定，自坡腳按1:1坡度開挖邊坡，在椅子處設置寬度不小于2.5m寬的平臺以保證椅子的穩(wěn)定。 2）、擋土墻的配筋設計：擋土墻配筋所需要的彎矩和剪力根據(jù)有限元計算。配筋計算采用BAELmod99規(guī)范第6、7章的方法。 3）、施工中擋土墻需要設置的臨時支擋措施：根據(jù)有限元計算，，在椅子以下TVO和下壁墻施工完成時穩(wěn)定性不足，需要設置一個臨時的外部支撐，最小支撐力為163kN/m。 4）、中國規(guī)范和歐洲規(guī)范公路擋土墻設計方法異同分析：中國規(guī)范與歐洲規(guī)范的基本設計理論與設計方法一致。主要區(qū)別為地震力的考慮方法，荷載組合的分項系數(shù)，外部穩(wěn)定系數(shù)，地基承載力及偏心要求等。另外，對于鋼筋混凝土擋土墻，墻身強度、配筋計算方法也稍有不同。
[Abstract]:In this paper, a new type of reinforced concrete retaining wall is proposed based on the design of retaining structure of high and steep slope formed by construction and excavation of K131 East-West Expressway in Algeria. In this paper, the external stability of retaining wall is calculated according to European Code, and the stability of retaining wall in each process is analyzed by using finite element method to simulate the field working condition. According to the bending moment and shear force calculated by finite element method, the reinforcement design of retaining wall is carried out. The main research contents and conclusions are as follows: 1) the design dimensions of the retaining wall are drawn up: the height of the retaining wall is determined according to the difference between the shoulder height and the height of the slope foot, and the foundation depth is guaranteed to be 1.5 m; The principle of chair length setting is as follows: according to the current situation of slope excavation, in order to ensure the stability of temporary slope, the slope is excavated at 1:1 slope from the foot of the slope. In order to ensure the stability of the chair, a platform with a width of not less than 2.5m is set. 2) the reinforcement design of the retaining wall: the bending moment and shear force required for the reinforcement of the retaining wall are calculated according to the finite element method. The reinforcement calculation is based on the method of Chapter 6 / 7 of the BAELmod99 Code. (3) the temporary retaining measures needed to be set up in the construction of retaining wall: according to the finite element calculation, the stability of the TVO under the chair and the construction of the lower wall is not enough, It is necessary to set up a temporary external support, the minimum supporting force is 163kN / m.4). The similarities and differences of the design methods of highway retaining wall between the Chinese Code and the European Code are analyzed: the basic design theory and design method of the Chinese Code and the European Code are consistent. The main differences are the consideration method of seismic force, the partial coefficient of load combination, the external stability coefficient, the bearing capacity of foundation and the requirements of eccentricity, etc. In addition, for reinforced concrete retaining wall, the strength of the wall, reinforcement calculation method is also slightly different.
【學位授予單位】：長安大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U416.1

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