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1.机械工业勘察设计研究院有限公司,陕西 西安 710043
2.西安理工大学岩土工程研究所,陕西 西安 710048
Received:18 July 2022,
Revised:2022-08-20,
Published:15 December 2023
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马云峰,彭森,葛苗苗等.黄土高填方地基上部建筑施建控制标准研究[J].防灾减灾工程学报,2023,43(06):1415-1424.
MA Yunfeng,PENG Sen,GE Miaomiao,et al.Study on Construction Control Standard of upper Buildings on Loess High Fill Foundation[J].Journal of Disaster Prevention and Mitigation Engineering,2023,43(06):1415-1424.
马云峰,彭森,葛苗苗等.黄土高填方地基上部建筑施建控制标准研究[J].防灾减灾工程学报,2023,43(06):1415-1424. DOI: 10.13409/j.cnki.jdpme.20220718005.
MA Yunfeng,PENG Sen,GE Miaomiao,et al.Study on Construction Control Standard of upper Buildings on Loess High Fill Foundation[J].Journal of Disaster Prevention and Mitigation Engineering,2023,43(06):1415-1424. DOI: 10.13409/j.cnki.jdpme.20220718005.
黄土高填方地基上部建筑的工后沉降及施建时间问题是目前研究的热点。以某黄土沟壑区新区建设中的高填方工程为背景,基于试验段工后沉降监测结果,运用MIDAS/GTS⁃NX数值反演分析方法来获取填方土体蠕变力学参数,并针对不同偏心距及施建时间下高层和低层建筑物地基的工后沉降特征开展了系统研究。结果表明:(1)基于实测资料的分层迭代反演分析方法所得填土体参数较准确反应黄土高填方土体的实际受荷状态及上部建筑基础的工后沉降特征。(2)当低层或高层建筑偏心距
w
=0 m或
w
=221 m时,局部倾斜最小且均满足局部倾斜
f
<
0.002要求,建议低层建筑施建偏心距
w
≥157 m,工后施建时间
t
≥1.21年;高层建筑施建偏心距
w
≥155 m,工后施建时间
t
≥1.5年。通过本文的研究,可为类似“上山建城”高填方顶部建筑的施建位置及工后施建时间提供科学参考。
The post-construction settlement and construction time of the superstructure on the loess high-fill foundation are the focus of current research. Based on the monitoring results of the post-construction settlement of the test section, the MIDAS/GTS-NX numerical inversion analysis method was used to obtain the creep mechanical parameters of the filled soil, and the post-construction settlement characteristics of the high-rise and low-rise buildings under different eccentricities and construction time were systematically studied. The results show that: (1) The parameters of fill material obtained by layered iterative inversion analysis based on measured data reflect the actual loading state of loess high fill and post-construction settlement behaviour of the upper buildings accurately. (2) For low-rise or high-rise building with eccentricity
w
=0 m or
w
=221 m, the local tilt is minimal and all meet the requirements of local tilt
f
<
0.002. It is recommended that for low-rise building construction, the eccentricity
w
≥157 m and construction time
t
≥1.21 years. For high-rise building construction, the eccentricity
w
≥155 m, construction time
t
≥1.5 years after construction. Through the research of this paper, it can provide scientific reference for the construction location and construction time of high fill top buildings similar to "building a city up the hill".
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