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In the detection of building foundation piles, crosshole sonic logging is the important detection method to judge the integrality of pile body for cast-in-place concrete pile. In this paper, it is introduced the basic principle and judgment basis of detecting integrality of pile body with crosshole sonic logging as well as summarized the process flow and matters needing attention of on-site detection by taking the project of archives center in a city as an example, which provide accurate detection data for the quality of foundation pile in project.
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在建筑基桩检测中,声波透射法是判断混凝土灌注桩桩身完整性的重要检测方法。文章以某市档案馆工程为例,介绍了声波透射法检测桩身完整性的基本原理和判定依据,对现场检测的工序流程及注意事项进行总结,为该工程的基桩质量提供了准确的检测数据。
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张加刚(1988-),男,内蒙古包头市人,硕士,高级工程师,现从事工程地球物理勘探及检测工作。
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张加刚(1988-),男,内蒙古包头市人,硕士,高级工程师,现从事工程地球物理勘探及检测工作。
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张加刚(1988-),男,内蒙古包头市人,硕士,高级工程师,现从事工程地球物理勘探及检测工作。
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JGJ 106—2014,建筑基桩检测技术规范[S]., articleTitle=null, refAbstract=null), Reference(id=1187102811377516690, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1186982298009354865, doi=null, pmid=null, pmcid=null, year=2019, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=[7], rfOrder=6, authorNames=黄亮, journalName=基桩声波透射法CT技术的桩身缺陷识别研究, refType=null, unstructuredReference=黄亮.
基桩声波透射法CT技术的桩身缺陷识别研究[D]. 武汉: 华中科技大学,
2019., articleTitle=null, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1187102806583427118, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1186982298009354865, xref=null, ext=[AuthorCompanyExt(id=1187102806587621423, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1186982298009354865, companyId=1187102806583427118, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Baotou Steel Survey and Mapping Research Institute, Baotou 014010, Inner Mongolia Autonomous Region, China), AuthorCompanyExt(id=1187102806596010032, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1186982298009354865, companyId=1187102806583427118, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=包钢勘察测绘研究院,内蒙古 包头 014010)])], figs=[ArticleFig(id=1187102810115031165, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1186982298009354865, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 桩径D/mm | 声测管数量/根 |
| D≤800 | 2 |
| 800<D≤1 600 | 3 |
| D>1 600 | 4 |
| D>2 500 | 根据实际情况增加数量 |
), ArticleFig(id=1187102810182140032, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1186982298009354865, language=CN, label=表1, caption=
声测管埋设数量要求
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| 桩径D/mm | 声测管数量/根 |
| D≤800 | 2 |
| 800<D≤1 600 | 3 |
| D>1 600 | 4 |
| D>2 500 | 根据实际情况增加数量 |
), ArticleFig(id=1187102810257637506, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1186982298009354865, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 类别 | 完整性 | 判定依据 |
| Ⅰ类桩 | 桩身完整 | 各声测剖面每个测点的声速、波幅均大于临界值,波形正常。 |
| Ⅱ类桩 | 轻微缺陷 | 某一声测剖面个别测点的声速、波幅略小于临界值,但波形基本正常。 |
| Ⅲ类桩 | 明显缺陷 | 某一声测剖面连续多个测点或某一深度桩截面处的声速、波幅值小于临界值,PSD值变大,波形畸变。 |
| Ⅳ类桩 | 严重缺陷 | 某一声测剖面连续多个测点或某一深度桩截面处的声速、波幅值明显小于临界值,PSD值突变,波形严重畸变。 |
), ArticleFig(id=1187102810396049541, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1186982298009354865, language=CN, label=表2, caption=
基桩桩身完整性及类别判定依据
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| 类别 | 完整性 | 判定依据 |
| Ⅰ类桩 | 桩身完整 | 各声测剖面每个测点的声速、波幅均大于临界值,波形正常。 |
| Ⅱ类桩 | 轻微缺陷 | 某一声测剖面个别测点的声速、波幅略小于临界值,但波形基本正常。 |
| Ⅲ类桩 | 明显缺陷 | 某一声测剖面连续多个测点或某一深度桩截面处的声速、波幅值小于临界值,PSD值变大,波形畸变。 |
| Ⅳ类桩 | 严重缺陷 | 某一声测剖面连续多个测点或某一深度桩截面处的声速、波幅值明显小于临界值,PSD值突变,波形严重畸变。 |
), ArticleFig(id=1187102810509295751, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1186982298009354865, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | Z18 | Z72 | Z141 | Z552 |
| 桩径/mm | 800 | 800 | 800 | 800 |
| 测试深度/m | 28.4 | 15 | 17 | 17 |
| 剖面 | 1-2 | 1-2 | 1-2 | 1-2 |
| 平均声速/(km·s-1) | 3.748 | 3.517 | 3.818 | 3.956 |
| 声速临界值/(km·s-1) | 3.409 | 3.291 | 3.553 | 3.472 |
| 声速标准差/(km·s-1) | 0.124 | 0.088 | 0.100 | 0.294 |
| 平均声幅/dB | 105.85 | 106.72 | 105.34 | 107.04 |
| 声幅临界值/dB | 99.85 | 100.72 | 99.34 | 101.04 |
| 声幅标准差/dB | 2.35 | 2.02 | 3.23 | 2.87 |
| 桩身完整性描述 | 桩身完整 | 桩身完整 | 轻微缺陷 | 轻微缺陷 |
| 桩身完整性类别 | Ⅰ | Ⅰ | Ⅱ | Ⅱ |
), ArticleFig(id=1187102810576404617, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1186982298009354865, language=CN, label=表3, caption=
声学参数检测结果统计
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | Z18 | Z72 | Z141 | Z552 |
| 桩径/mm | 800 | 800 | 800 | 800 |
| 测试深度/m | 28.4 | 15 | 17 | 17 |
| 剖面 | 1-2 | 1-2 | 1-2 | 1-2 |
| 平均声速/(km·s-1) | 3.748 | 3.517 | 3.818 | 3.956 |
| 声速临界值/(km·s-1) | 3.409 | 3.291 | 3.553 | 3.472 |
| 声速标准差/(km·s-1) | 0.124 | 0.088 | 0.100 | 0.294 |
| 平均声幅/dB | 105.85 | 106.72 | 105.34 | 107.04 |
| 声幅临界值/dB | 99.85 | 100.72 | 99.34 | 101.04 |
| 声幅标准差/dB | 2.35 | 2.02 | 3.23 | 2.87 |
| 桩身完整性描述 | 桩身完整 | 桩身完整 | 轻微缺陷 | 轻微缺陷 |
| 桩身完整性类别 | Ⅰ | Ⅰ | Ⅱ | Ⅱ |
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