本文選題：黃泛區(qū)　切入點：橋頭跳車　出處：《山東大學》2017年碩士論文　論文類型：學位論文

【摘要】：黃河沖積平原區(qū)地勢平坦,軟弱土層深厚。修建在該地區(qū)的高速公路多為填方路基,且填筑高度一般較高,而土質(zhì)又多為粉土、粉質(zhì)粘土,地下水位較高,因此路基容易發(fā)生各類病害。其中,尤以在路橋過渡段發(fā)生的差異沉降最為常見,且危害性巨大。因此,為減小差異沉降、避免橋頭跳車發(fā)生,既需要采取合理的路橋過渡段差異沉降控制標準,也需要選擇合適的地基、路基處治技術(shù)。然而,目前國內(nèi)并沒有對路橋過渡段差異沉降控制標準進行明確而又統(tǒng)一的規(guī)定,常用的地基處治技術(shù)也不能有效減小高填土路基工后沉降。本文首先對黃泛區(qū)已建高速公路路橋過渡段差異沉降進行調(diào)查及分析,提出工后沉降量和工后沉降速率雙控制指標。通過FLAC3D數(shù)值軟件建立路基、路面模型,計算得出路面結(jié)構(gòu)破壞時路基不均勻沉降量,結(jié)合高速公路中修時間點,分階段確定工后沉降速率控制標準,并基于雙指標控制標準對黃泛區(qū)高速公路常用的地基處治技術(shù)進行評價。最后通過室內(nèi)模型試驗和數(shù)值模擬分析,研究一種新型的透水性混凝土樁復(fù)合地基的承載特性和排水特性,分析樁長、樁間距對沉降量及排水性的影響。本文成果的取得,可為黃泛區(qū)高速公路地基處治方式的選擇提供新的依據(jù),避免橋頭跳車發(fā)生。
[Abstract]:The Yellow River alluvial plain area is flat, the soft soil layer is deep, the expressway built in this area is mostly filled with embankment, and the height of filling is generally higher, and the soil quality is mostly silt, silty clay, and the groundwater level is higher. Therefore, subgrade is prone to various kinds of diseases. The differential settlement, especially in the transition section of road and bridge, is the most common and harmful. Therefore, in order to reduce the differential settlement and avoid the bridge head jumping, It is necessary not only to adopt reasonable differential settlement control standard of the transition section of road and bridge, but also to select appropriate foundation and subgrade treatment technology. However, there is no clear and unified regulation on the control standard of differential settlement in the transition section of road and bridge in China. The commonly used foundation treatment techniques can not effectively reduce the post-construction settlement of high fill subgrade. Firstly, this paper investigates and analyzes the differential settlement of the highway and bridge transition section of the built expressway in the flood area of the Yellow River. This paper puts forward the double control indexes of the amount of settlement after construction and the rate of settlement after construction. The model of subgrade and pavement is established by FLAC3D numerical software, and the uneven settlement of roadbed when pavement structure is destroyed is calculated, combined with the time point of middle repair of expressway. The control standard of settlement rate after construction is determined in stages, and the common foundation treatment technology of highway in the flood area of Yellow River is evaluated based on double index control standard. Finally, through indoor model test and numerical simulation analysis, The bearing and drainage characteristics of a new type of permeable concrete pile composite foundation are studied, and the effects of pile length and spacing on settlement and drainage are analyzed. It can provide a new basis for the selection of treatment mode of expressway foundation in the Yellow River flood area and avoid the bridge-head jumping.
【學位授予單位】：山東大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：U416.1

【參考文獻】

相關(guān)期刊論文 前10條

1 宋修廣;于一凡;張宏博;葛智;;透水性混凝土樁施工中超孔隙水壓力變化特性試驗[J];建筑科學與工程學報;2016年01期

2 于一凡;張宏博;黃大偉;宋修廣;;透水性混凝土樁在橋頭跳車處治中的適用性研究[J];鐵道建筑;2015年07期

3 陳小芳;;EPS輕質(zhì)填料在橋頭段路基工程中的施工及應(yīng)用[J];山西建筑;2015年14期

4 宋修廣;周志東;張崇高;厲超;;強夯聯(lián)合井點降水加固粉土地基現(xiàn)場試驗[J];公路交通科技;2015年03期

5 于一凡;宋修廣;張宏博;葛智;;透水性混凝土樁聯(lián)合輪胎碎石抗滑排水路基新技術(shù)[J];建材發(fā)展導向;2014年16期

6 潘宏鑫;;CFG樁復(fù)合地基有限元分析[J];科技視界;2014年10期

7 宋修廣;周志東;楊陽;張宏博;;強夯法加固無黏性土路基的現(xiàn)場試驗與數(shù)值分析[J];公路交通科技;2014年03期

8 張娜;崔新壯;張炯;周亞旭;高智s，

本文編號：1615753