| 管幕冻结法现场试验研究 |
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| 引用本文： | 胡向东,郭晓东,王啟铜,任辉,贺龙鹏,邓声君.管幕冻结法现场试验研究[J].隧道建设,2015,35(Z2):1-7. |
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| 作者姓名： | 胡向东 郭晓东 王啟铜 任辉 贺龙鹏 邓声君 |
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| 作者单位： | (1.同济大学地下建筑与工程系， 上海 200092； 2.同济大学岩土及地下工程教育部重点实验室， 上海 200092； 3.港珠澳大桥珠海连接线管理中心， 广东 珠海 519030) |
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| 基金项目： | 交通运输部建设科技项目(2013318J11300)； 国家自然科学基金资助项目(51478340) |
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| 摘 要： | 港珠澳大桥珠海连接线拱北隧道工程口岸暗挖段的超前预支护体系采用管幕冻结法。该工法独创运用内置在顶管里面的冻结管、加强管以及限位管3种管路的冻结系统，以便实现“冻起来、抗弱化、控冻胀”这一独特的管幕冻结法理念。通过现场试验，对该工法在现场条件下的冻结效果以及控制冻结方案进行研究。试验结果表明： 管幕冻结法在现场环境下具有优良的封水效果； 通过限位管实施的“热控”限位效果局限于限位管区域而调控盐水温度的“冷控”限位则对整个冻结帷幕都能产生影响。
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| 关 键 词： | 管幕冻结法 现场试验 港珠澳大桥 冻结模式 控制冻结 |
| 收稿时间： | 2015-10-27 |
| 修稿时间： | 2015-11-20 |
Field Test Study on Freezing Technology of Freeze Sealing Pipe Roof |
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| HU Xiangdong,GUO Xiaodong,WANG Qitong,REN Hui,HE Longpeng,DENG Shengjun.Field Test Study on Freezing Technology of Freeze Sealing Pipe Roof[J].Tunnel Construction,2015,35(Z2):1-7. |
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| Authors: | HU Xiangdong GUO Xiaodong WANG Qitong REN Hui HE Longpeng DENG Shengjun |
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| Institution: | (1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 3. The Management Center of Zhuhai Link Road of Hong Kong Zhuhai Macao Bridge, Zhuhai 519030, China) |
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| Abstract: | As an innovative pre supporting method in tunnel construction, Freeze Sealing Pipe Roof (FSPR) is applied to Gongbei Tunnel of Hong Kong Zhuhai Macau Bridge. An effective freeze control system, which contains master freezing tubes, enhancing freezing tubes and limiting tubes, is established for building up the frozen curtain, maintaining its stability during excavation and controlling the volume of frozen soil to limit frost heave dynamically. Field test is carried out to confirm the real freezing effect. The results of test indicate that the Freeze Sealing Pipe Roof can achieve good waterproof curtain in the actual tunnel construction condition. The mode of “hot control” can inhibit the growth of frozen soil wall around limiting tubes, while the “cold control” has influence on the whole frozen wall. |
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| Keywords: | freeze sealing pipe roof field test Hong Kong Zhuhai Macau Bridge freezing mode controled freezing |
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