【摘要】：山區(qū)路堤填筑材料缺乏,是目前山區(qū)道路修建過程中遇到的普遍問題。與此同時,開鑿隧道和挖方產生的大量超大粒徑塊石由于粒徑過大無法使用被棄置浪費,破壞生態(tài)環(huán)境。本文通過采用布放施工工藝研究超大粒徑塊石填筑路堤可行性,分析超大粒徑塊石布放的具體參數,確定了超大粒徑塊石的布放方案和工藝,并對其他施工工藝進行了優(yōu)化。本文的主要研究內容和研究成果包括如下五個方面:(1)通過布放工藝研究超大粒徑塊石填筑路堤的可行性,通過實驗和數值模擬研究超大粒徑塊石對路基壓實的影響以及超大粒徑塊石位置對路基穩(wěn)定性的影響。最終試驗路現(xiàn)場檢測和沉降觀測證明含超大粒徑塊石路堤質量合格,超大粒徑塊石可用于路堤修筑。(2)通過分析室內試驗和數值模擬數據得出結論,在控制超大粒徑塊石的間距大于夯實機具尺寸的情況下,可保證路基填料的壓實。同時室內試驗實驗結果表明超大粒徑塊石周圍并不存在難以壓實的松散區(qū)域。(3)分析基于車輛動荷載下超大粒徑塊石的最小埋置深度。為保證含超大粒徑塊石路堤穩(wěn)定性,通過研究車輛震動荷載對道路影響,確定基于動荷載影響下半剛性路面的路基工作區(qū),來確定超大粒徑塊石布放時距離路基頂面的最小距離。最終確定在一般高速公路路面設計結構層情況下,超大粒徑塊石距離路基頂面最小高度為1.5m,即路基頂面以下1.5m范圍內不能布放超大粒徑塊石。(4)研究超大粒徑塊石在路基中的布放參數,分析了超大粒徑塊石的最佳層位布放和填筑方式,探討了超大粒徑塊石在路基中水平和豎直方向的位置關系;以邊坡安全系數為指標,分析了邊坡處超大粒徑塊石的位置對路基穩(wěn)定性的影響。結合以上布放參數,在考慮施工便宜性的基礎上,確定了超大粒徑塊石在路堤填筑中的布放施工方案。(5)針對超大粒徑塊石的特點,研究設計了超大粒徑布放的施工工藝,優(yōu)化了分層攤鋪、整平和碾壓等施工工藝,并對含超大粒徑塊石路堤施工質量的檢測方法進行了研究。
[Abstract]:The lack of materials for embankment construction in mountainous areas is a common problem in the construction of mountain roads. At the same time, a large number of super-sized stones produced by tunneling and excavating can not be used and wasted because of their large size, and the ecological environment is destroyed. In this paper, the feasibility of filling embankment with large diameter block stone is studied by using placement construction technology, the concrete parameters of large diameter block stone placement are analyzed, the layout scheme and technology of large size block stone are determined, and other construction techniques are optimized. The main research contents and results of this paper include the following five aspects: (1) the feasibility of filling embankment with large diameter block stone is studied by placement technology. Through experiments and numerical simulation, the influence of large diameter block stone on roadbed compaction and the influence of large diameter block stone position on roadbed stability are studied. The site test and settlement observation of the final test road prove that the quality of the embankment containing large diameter block stone is up to standard, and the large diameter block stone can be used in the construction of embankment. (2) by analyzing the indoor test and numerical simulation data, the conclusion is drawn. The compaction of roadbed fillers can be ensured by controlling the spacing of large diameter blocks larger than the size of ramming machines. At the same time, the results of laboratory tests show that there is no loose area around the super-sized block stone. (3) the minimum burial depth of super-large size block stone under vehicle dynamic load is analyzed. In order to ensure the stability of embankment with large diameter stone, the subgrade working area of semi-rigid pavement under the influence of dynamic load is determined by studying the influence of vehicle vibration load on road. To determine the minimum distance from the top of the roadbed when the large diameter block is placed. Finally, it is determined that the minimum height from the top surface of the roadbed is 1.5 m under the condition of the general expressway pavement design structure layer. That is to say, it is not possible to place super-sized block stones within 1.5 m below the top surface of roadbed. (4) the distribution parameters of super-large size block stones in the roadbed are studied, and the optimum layout and filling mode of super-large diameter massive stones are analyzed. The relationship between horizontal and vertical direction of large-sized block stone in roadbed is discussed. Taking the safety factor of slope as the index, the influence of the location of large diameter stone on the stability of roadbed is analyzed. Based on the above layout parameters and considering the low cost of construction, the construction scheme of super-large diameter block stone in embankment filling is determined. (5) according to the characteristics of super-large diameter block stone, the construction technology of super-large diameter block stone is studied and designed. The construction techniques such as layering spreading leveling and rolling are optimized and the inspection method of construction quality of embankment with large diameter stone is studied.
【學位授予單位】：河北工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U416.12

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本文編號：2425277