| 高速公路软土路基沉降预测方法研究 |
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| 引用本文： | 席志龙,马妍,田泽宇.高速公路软土路基沉降预测方法研究[J].测绘与空间地理信息,2020(3):204-207. |
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| 作者姓名： | 席志龙 马妍 田泽宇 |
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| 作者单位： | 黑龙江工程学院 |
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| 摘 要： | 高速公路是国家路网的重要组成部分,随着"一带一路"政策的提出,高速公路的修建及维护变得越来越重要。截至2017年底,我国高速公路里程累计约13.1万千米,居于世界前列。软土路基是一种特殊的路基,其主要特点是压缩性高、含水量大、天然强度低和渗透性差,主要分布于江、河、湖、海沿岸以及多雨的山间洼地等地区,修筑的高速公路如果穿过软土地区,其路基的沉降持续时间更长,变形速率更快,严重影响路面的平顺和稳定,需要进行更加严格的沉降观测和精度更高的沉降预测模型。本文以哈尔滨至牡丹江高速公路(简称哈牡高速)为研究对象,实地采集沉降观测数据,将常用的沉降预测模型结果与组合预测模型结果进行对比分析,证明组合预测的方法具有一定的优势,结论对东北地区软土路基高速公路的沉降预测具有一定的参考价值。
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| 关 键 词： | 高速公路 软土路基 沉降预测 组合模型 |
Research on Methods of Subsidence Prediction for Highway’s Soft-soil Subgrade |
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| XI Zhilong,MA Yan,TIAN Zeyu.Research on Methods of Subsidence Prediction for Highway’s Soft-soil Subgrade[J].Geomatics & Spatial Information Technology,2020(3):204-207. |
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| Authors: | XI Zhilong MA Yan TIAN Zeyu |
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| Institution: | (Heilongjiang Institute of Technology,Harbin 150050,China) |
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| Abstract: | Highway is one of the most important means of transportation for people and also an important part of the national road network. With the introduction of the policy of "one belt and one road",the construction and maintenance of highways are becoming more and more important. By the end of 2017,China’s highway mileage had totaled about 131 thousand kilometers,ranking in the top of the world. Soft soil roadbed is a special kind of roadbed with the main characteristics of high compressibility,high water content,low natural strength,and poor permeability. It is mainly distributed in rivers,lakes,coastal areas and rainy intermountainous depressions. The soft-soil subgrade is a special kind of subgrade,which distributes along rivers,oceans,ponds,seas and intermountainous depressions with a lot of rain. And it has characteristics of large water content,poor permeability,low natural strength and high compressibility. If one expressway passes through these areas,its roadbed subsidence lasts longer and its deformation rate is faster,which seriously affects the smoothness and stability of the pavement. So more strict subsidence observation and more accurate subsidence prediction model are needed. In this paper,Harbin-Mudanjiang Expressway(Ha-Mu Expressway) is taken as the research object,and data is collected on the spot. The results of commonly used subsidence prediction model are compared with those of combined prediction model,which proves that the combined prediction method has certain advantages. The conclusion provides certain reference value for the subsidence prediction of the soft soil roadbed expressway in Northeast China. |
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| Keywords: | highways soft-soil subgrade subsidence prediction combinatorial model |
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