| 液氮冻结法更换盾构尾刷的施工监测分析 |
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| 引用本文： | 张彪,孙宇坤.液氮冻结法更换盾构尾刷的施工监测分析[J].煤炭工程,2011,0(11):51-53. |
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| 作者姓名： | 张彪 孙宇坤 |
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| 作者单位： | 1. 中铁隧道集团有限公司,河南洛阳,471009
2. 浙江工业大学建筑工程学院,浙江杭州,310014 |
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| 摘 要： | 盾构尾刷更换的圆环柱状地层冻结加固施工不同于常规的地铁工程冻结施工。基于杭州庆春路过江隧道工程实例，对承压水地层条件下尾刷更换的液氮冻结法设计和液氮去回路温度、土体温度场、管片温度及解冻后的温度等施工监测数据进行了分析。分析表明，所采用的冻土帷幕符合盾构尾刷安全更换的施工条件，为类似地质条件下的盾构尾刷更换提供了新的思路。
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| 关 键 词： | 液氮冻结 尾刷 更换 盾构隧道 实测 |
Replacement Construction Measurement Analysis of Shield Tail Brush by Liquid Nitrogen Freezing Method |
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| Abstract: | Cylindrical ring ground freezing method of shield tail brush replacement construction is quite different from the conventional metro freezing strengthening projects. Based on Hangzhou Qingchun Road Cross-river Tunnel engineering example, under confined water stratum conditions, the liquid nitrogen freezing method designed to replace shield tail brush, liquid nitrogen temperature, ground temperature, segment lining temperature and thawing temperature were analyzed. Analysis results show that the adopting frozen wall was fit for safety replacement construction of shield tail brush. It can provide a new way to replace shield tail brush under similar geological conditions. |
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| Keywords: | liquid nitrogen freezing tail brush replacement construction shield tunnel measurement |
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