Article(id=1261270372511507387, tenantId=1146029695717560320, journalId=1146123166801305609, issueId=1261262687258985194, articleNumber=null, orderNo=null, doi=10.12404/j.issn.1671-1815.2405469, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1721491200000, receivedDateStr=2024-07-21, revisedDate=1744646400000, revisedDateStr=2025-04-15, acceptedDate=null, acceptedDateStr=null, onlineDate=1778639890076, onlineDateStr=2026-05-13, pubDate=1752768000000, pubDateStr=2025-07-18, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1778639890076, onlineIssueDateStr=2026-05-13, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1778639890076, creator=13701087609, updateTime=1778639890076, updator=13701087609, issue=Issue{id=1261262687258985194, tenantId=1146029695717560320, journalId=1146123166801305609, year='2025', volume='25', issue='20', pageStart='8317', pageEnd='8759', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1778638057769, creator=13701087609, updateTime=1778753106634, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1261745237240722095, tenantId=1146029695717560320, journalId=1146123166801305609, issueId=1261262687258985194, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1261745237240722096, tenantId=1146029695717560320, journalId=1146123166801305609, issueId=1261262687258985194, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=8624, endPage=8631, ext={EN=ArticleExt(id=1261270374495413189, articleId=1261270372511507387, tenantId=1146029695717560320, journalId=1146123166801305609, language=EN, title=Displacement Characteristics of Deep Foundation Pit with Pile-anchor Support Considering Snowfall, columnId=1156262729917780302, journalTitle=Science Technology and Engineering, columnName=Papers·Architectural Science, runingTitle=null, highlight=null, articleAbstract=
In order to study the displacement characteristics of pile and anchor supporting deep foundation pit in seasonal frozen loess area, the horizontal displacement of pile top and pile body and the surface settlement outside the pit under different working conditions were compared by indoor scale model test. The results show that water migration and redistribution occur in the freeze-thaw cycle, and the existence of external water replenishment conditions will accelerate the water migration rate, which makes the displacement of supporting structure and the surface settlement outside the pit much larger than that in the excavation stage. The maximum horizontal displacement of pile top and pile body in the freeze-thaw stage under closed conditions increase by 6~8 times compared with that in the excavation stage, and the surface settlement outside the pit increases by 3 times. Compared with the closed freeze-thaw condition, the horizontal displacement of pile top and pile body increases about 1.4 and 1.2 times, and the surface settlement outside the pit increases 1.5 times. The research results can provide reference for the risk prevention and control of pile and anchor support deep foundation pit construction in this kind of seasonal freezing loess area.
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为深入研究季冻黄土地区桩锚支护深基坑的变位特性,通过室内缩尺模型试验对比不同工况下桩顶、桩身水平位移及坑外地表沉降的变化规律。结果表明:冻融循环过程中土体水分发生迁移重分布,存在外界补水条件会使水分迁移速率加快,使得支护结构位移与坑外地表沉降远大于开挖阶段,封闭条件冻融阶段的最大桩顶和桩身水平位移较开挖阶段增大了6~8倍,坑外地表沉降量增大了3倍;与封闭冻融条件相比,降雪条件下桩顶和桩身水平位移约增大1.4和1.2倍,坑外地表沉降量增大了1.5倍。研究结果可为此类季冻黄土地区桩锚支护深基坑施工风险防控提供参考。
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1 青海大学土木水利学院, 西宁 810016
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李元勋(1988—),男,汉族,甘肃甘谷人,博士,副教授。研究方向:岩土与地下工程。E-mail:lyx2017@qhu.edu.cn。
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李元勋(1988—),男,汉族,甘肃甘谷人,博士,副教授。研究方向:岩土与地下工程。E-mail:lyx2017@qhu.edu.cn。
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1 青海大学土木水利学院, 西宁 810016)]), AuthorCompany(id=1261270389087395889, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1261270372511507387, xref=2, ext=[AuthorCompanyExt(id=1261270389112561715, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1261270372511507387, companyId=1261270389087395889, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2 青海省建筑节能材料与工程安全重点实验室, 西宁 810016)])], figs=[ArticleFig(id=1261270407995318484, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1261270372511507387, language=EN, label=Fig.1, caption=
Section layout of deep foundation pit, figureFileSmall=yn07+Ib7J0AEsgdoMsIajA==, figureFileBig=h849ssmQJjqTAdL5OXvurg==, tableContent=null), ArticleFig(id=1261270409022922973, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1261270372511507387, language=CN, label=图1, caption=
深基坑剖面布置, figureFileSmall=yn07+Ib7J0AEsgdoMsIajA==, figureFileBig=h849ssmQJjqTAdL5OXvurg==, tableContent=null), ArticleFig(id=1261270411426259173, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1261270372511507387, language=EN, label=Fig.2, caption=
Snowfall completion, figureFileSmall=84W+2ccPlmHt5imGGvE2kA==, figureFileBig=Xs+wyZrKhCBkjYd6+SL8/Q==, tableContent=null), ArticleFig(id=1261270412097347816, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1261270372511507387, language=CN, label=图2, caption=
降雪完成, figureFileSmall=84W+2ccPlmHt5imGGvE2kA==, figureFileBig=Xs+wyZrKhCBkjYd6+SL8/Q==, tableContent=null), ArticleFig(id=1261270412684550383, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1261270372511507387, language=EN, label=Fig.3, caption=
Moisture content changes with the number of freeze-thaw times under closed condition, figureFileSmall=yJ8XOMK24PAiCuJoXVqFXg==, figureFileBig=lbmVD2qCatYicrdGrZFifg==, tableContent=null), ArticleFig(id=1261270413531799798, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1261270372511507387, language=CN, label=图3, caption=
封闭条件下含水率随冻融次数变化, figureFileSmall=yJ8XOMK24PAiCuJoXVqFXg==, figureFileBig=lbmVD2qCatYicrdGrZFifg==, tableContent=null), ArticleFig(id=1261270413905092858, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1261270372511507387, language=EN, label=Fig.4, caption=
Moisture content changes with the frequency of freeze-thaw under snowfall conditions, figureFileSmall=8EePapdTN1S/+4PGjp+LVw==, figureFileBig=zNU1kflEYdWC3bGUPVR+qw==, tableContent=null), ArticleFig(id=1261270417663189249, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1261270372511507387, language=CN, label=图4, caption=
降雪条件下含水率随冻融次数变化, figureFileSmall=8EePapdTN1S/+4PGjp+LVw==, figureFileBig=zNU1kflEYdWC3bGUPVR+qw==, tableContent=null), ArticleFig(id=1261270417973567748, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1261270372511507387, language=EN, label=Fig.5, caption=
Change of pile top horizontal displacement with excavation depth, figureFileSmall=wpExvTJjEPlv/mfeMSViRw==, figureFileBig=Adodsv/M4QqLPjaFCULIDg==, tableContent=null), ArticleFig(id=1261270418397192455, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1261270372511507387, language=CN, label=图5, caption=
桩顶水平位移随开挖深度的变化, figureFileSmall=wpExvTJjEPlv/mfeMSViRw==, figureFileBig=Adodsv/M4QqLPjaFCULIDg==, tableContent=null), ArticleFig(id=1261270418736931084, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1261270372511507387, language=EN, label=Fig.6, caption=
Changes of horizontal displacement of pile top under different freeze-thaw conditions, figureFileSmall=zEdLVjsX7iT8tX3XqtzCNA==, figureFileBig=A/v75crFNEO50zIT5hLDRw==, tableContent=null), ArticleFig(id=1261270420272046352, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1261270372511507387, language=CN, label=图6, caption=
不同冻融条件下桩顶水平位移变化, figureFileSmall=zEdLVjsX7iT8tX3XqtzCNA==, figureFileBig=A/v75crFNEO50zIT5hLDRw==, tableContent=null), ArticleFig(id=1261270420536287509, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1261270372511507387, language=EN, label=Fig.7, caption=
Change of horizontal displacement of pile body during excavation, figureFileSmall=Qq6h1wOJ2AWeji3y0vCNnA==, figureFileBig=DdzRltydsNuLayThL4K1cw==, tableContent=null), ArticleFig(id=1261270420842471707, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1261270372511507387, language=CN, label=图7, caption=
开挖阶段桩身水平位移变化, figureFileSmall=Qq6h1wOJ2AWeji3y0vCNnA==, figureFileBig=DdzRltydsNuLayThL4K1cw==, tableContent=null), ArticleFig(id=1261270421060575517, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1261270372511507387, language=EN, label=Fig.8, caption=
Horizontal displacement of pile body changes during freeze-thaw stage, figureFileSmall=HWFJaFYG/1XC0q2VYeV9Ug==, figureFileBig=8voW636ylDu+AadoOqGnIA==, tableContent=null), ArticleFig(id=1261270423040287008, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1261270372511507387, language=CN, label=图8, caption=
冻融阶段桩身水平位移变化, figureFileSmall=HWFJaFYG/1XC0q2VYeV9Ug==, figureFileBig=8voW636ylDu+AadoOqGnIA==, tableContent=null), ArticleFig(id=1261270424718008610, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1261270372511507387, language=EN, label=Fig.9, caption=
Ground settlement during excavation, figureFileSmall=mikUOlJASoSnp/OJWmDhIQ==, figureFileBig=FmCUs8KuGjsyAhrX2VlyRw==, tableContent=null), ArticleFig(id=1261270424944501031, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1261270372511507387, language=CN, label=图9, caption=
开挖阶段地表沉降, figureFileSmall=mikUOlJASoSnp/OJWmDhIQ==, figureFileBig=FmCUs8KuGjsyAhrX2VlyRw==, tableContent=null), ArticleFig(id=1261270425405874475, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1261270372511507387, language=EN, label=Fig.10, caption=
Ground subsidence during freeze-thaw stage, figureFileSmall=0c56+jiX3ROT0wtaUfYOxA==, figureFileBig=jvFCVduF2EQ8CImHxIC+yw==, tableContent=null), ArticleFig(id=1261270425640755502, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1261270372511507387, language=CN, label=图10, caption=
冻融阶段地表沉降, figureFileSmall=0c56+jiX3ROT0wtaUfYOxA==, figureFileBig=jvFCVduF2EQ8CImHxIC+yw==, tableContent=null), ArticleFig(id=1261270425808527667, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1261270372511507387, language=EN, label=Table 1, caption=
Classification of snowfall
, figureFileSmall=null, figureFileBig=null, tableContent=
| 降雪等级 | 降水量/mm |
| 微量降雪 | <0.1 |
| 小雪 | 0.1~2.4 |
| 中雪 | 2.5~4.9 |
| 大雪 | 5.0~9.9 |
| 暴雪 | 10.0~19.9 |
| 大暴雪 | 20.0~29.9 |
| 特大暴雪 | ≥30 |
), ArticleFig(id=1261270426160849208, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1261270372511507387, language=CN, label=表1, caption=
降雪等级划分
, figureFileSmall=null, figureFileBig=null, tableContent=
| 降雪等级 | 降水量/mm |
| 微量降雪 | <0.1 |
| 小雪 | 0.1~2.4 |
| 中雪 | 2.5~4.9 |
| 大雪 | 5.0~9.9 |
| 暴雪 | 10.0~19.9 |
| 大暴雪 | 20.0~29.9 |
| 特大暴雪 | ≥30 |
), ArticleFig(id=1261270426399924542, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1261270372511507387, language=EN, label=Table 2, caption=
Test scheme
, figureFileSmall=null, figureFileBig=null, tableContent=
| 试验阶段 | 试验内容 |
| 基坑开挖 | 开挖总深度为1 m,分5次开挖,每次开挖0.2 m,开挖完成后稳定24 h监测数据变化,数据稳定后再继续下一次开挖 |
封闭条件 冻融循环 | 依照设定好的冻融温度梯度按正弦曲线进行冻融循环试验,每次冻融循环结束后监测数据变化,数据稳定后再进行下一次冻融循环,共计20次 |
降雪条件 冻融循环 | 按设计好的降雪方法进行降雪,再根据封闭条件冻融方法进行冻融循环 |
), ArticleFig(id=1261270426685137217, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1261270372511507387, language=CN, label=表2, caption=
试验方案
, figureFileSmall=null, figureFileBig=null, tableContent=
| 试验阶段 | 试验内容 |
| 基坑开挖 | 开挖总深度为1 m,分5次开挖,每次开挖0.2 m,开挖完成后稳定24 h监测数据变化,数据稳定后再继续下一次开挖 |
封闭条件 冻融循环 | 依照设定好的冻融温度梯度按正弦曲线进行冻融循环试验,每次冻融循环结束后监测数据变化,数据稳定后再进行下一次冻融循环,共计20次 |
降雪条件 冻融循环 | 按设计好的降雪方法进行降雪,再根据封闭条件冻融方法进行冻融循环 |
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