水气分离集成井降水强夯法试验研究 |
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引用本文: | 刘伟,陈慧刚,李平,陆海.水气分离集成井降水强夯法试验研究[J].河北工程大学学报,2015,32(2):60-64. |
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作者姓名: | 刘伟 陈慧刚 李平 陆海 |
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作者单位: | 1. 河海大学土木与交通学院,江苏南京,210098 2. 平湖市建筑工程管理处,浙江平湖,314200 3. 河海大学土木与交通学院,江苏南京210098;河海大学水资源高效利用与工程安全国家工程研究中心,江苏南京210098 4. 江苏诚丰建设有限公司,江苏江阴,214400 |
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摘 要: | 为了克服降水强夯法处理深度小、降水时间长的缺陷,结合扬中灏港通用码头软土地基处理工程,改进了传统降水强夯工艺,采用水气分离集成井降水联合强夯法进行加固处理。通过在常规真空井点降水强夯和改进降水强夯两个试验区开展现场监测和检测试验,对加固效果进行了对比评价分析,研究结果表明:水气分离集成井降水强夯工艺降水深度可达地表以下5~6 m,夯后孔压消散时间约为1~2天;地基加固后总地表施工期最大沉降量为0.606 m,可有效减小工后沉降;与常规井点降水强夯法相比,改进法加固后土体强度和地基承载力均有较大提高,地基加固效果优势明显。
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关 键 词: | 水气分离 降水强夯 软基加固 试验分析 扬中灏港 |
收稿时间: | 2014/11/23 0:00:00 |
Experimental study of moisture separator integrated wells dewatering-dynamic compaction |
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Authors: | LIU Wei CHEN Hui-gang LI Ping and LU Hai |
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Affiliation: | School of Civil and Transportation Engineering, Hohai University, Jiangsu Nanjing 210098, China;Pinghu City Construction Project Management Office, Zhejiang Pinghu 314200, China;School of Civil and Transportation Engineering, Hohai University, Jiangsu Nanjing 210098, China;National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety, Hohai University, Jiangsu Nanjing 210098, China;Jiangsu Cheng-feng Construction Co., Ltd, Jiangsu Jiangyin 214400, China |
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Abstract: | In order to overcome its defects of insufficient depth and dewatering long time, combining the soft foundation treating engineering of Yangzhong Haogang all-purpose wharf, the traditional dewatering-dynamic compaction is improved, in which moisture separator integrated wells dewatering-dynamic compaction is used to consolidate the soft foundation. Field monitoring and testing are carried out in two experimental sites, respectively the conventional vacuum wells dewatering-dynamic compaction, and another treated with the improved dewatering-dynamic compaction. The results show that dewatering depth of the improved dewatering-dynamic compaction could reach 5-6m below the surface, and the dissipating time of the pore water pressure after tamping is 1 to 2 days; the maximum settlement of the surface during the construction after the foundation consolidation is 0.606 m, thus the post-construction settlement is effectively reduced; compared to the conventional vacuum wells dewatering-dynamic compaction, both the soil strength and bearing capacity of the foundation have substantially improved. Thus it can be seen, the effect of the foundation consolidation is notable. |
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Keywords: | moisture separator dewatering-dynamic compaction soft foundation experimental analysis |
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