| 张书玉,刘波,席培胜.某紧邻高速公路偏压深基坑施工方案设计与监测分析[J].安徽建筑大学学报,2014,22(4):54-59 |
| 某紧邻高速公路偏压深基坑施工方案设计与监测分析 |
| Construction Scheme and Field Monitoring of an unsymmetrical loaded Deep foundation pit Adjacent to Expressway |
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| DOI：10.11921/j.issn.2095-8382.20140413 |
| 中文关键词: 深基坑 偏压 施工方案 高速公路 监测 |
| 英文关键词: deep foundation pit unsymmetrical load construction scheme expressway field monitoring |
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| 中文摘要: |
| 合肥地铁1号线某基坑紧邻既有高速公路高填方路基，处于偏压状态，施工期间必须保证基坑和路基稳定。以此为背景，详细介绍了深基坑具体设计方案和施工步骤，并制定了监测方案对基坑进行了现场监测，此外针对涉路交通方案也做了补充说明。监测结果表明：路基一侧围护桩桩体水平位移大于另一侧，围护结构上部出现了向低荷载一侧的整体“漂移”；无论是桩体水平位移还是路基沉降，沿基坑长度方向中部位置均大于两端，是基坑最薄弱区域；虽然高速公路一侧桩体变形和路基沉降值稍大，但相对值较低，施工期间基坑及高速公路安全稳定，未发生一起安全事故。可见，该基坑施工方案切实可行，可为今后类似工程提供参考。 |
| 英文摘要: |
| One foundation pit in Hefei Metro No.1 line is closed to existed expressway, influenced by unsymmetrical load of high-fill subgrade. Based on it, this paper introduced the design scheme and construction process in detail, and the field monitoring of deep foundation pit was carried out in accordance with monitoring scheme, at last, the traffic scheme related to the expressway was introduced additionally. The field monitoring results indicate that the horizontal displacement of supporting piles on the side of expressway is bigger than the other side, the upper parts of retaining structure appears to a “drift” towards the lower load side; no matter the displacement of piles or the settlement of subgrade, the value of central position is bigger than the left and right sides along the length of deep foundation pit, which is the weakest zone of the whole deep foundation pit; although the absolute value of horizontal displacement and settlement seems to be a big number, the relative value is small compared with the length of supporting pile and expressway. The deep foundation pit and expressway kept safe and stable in all the periods of construction, no one accident occurred during that time. Thus, it can be seen that this construction scheme is feasible and effective, which can provide a reference for design and construction to similar projects in the future. |
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