Settlement Monitoring and Analysis on Construction Process of SHR-SRC Structure in Ultra-thick Collapsible Loess Area
To truely reflect the variation law of settlement characteristics of Super High Rise-Steel Reinforced Concrete (SHR-SRC) structure with the upper load during the construction process in the ultra-thick collapsible loess area and guide the safe construction，a complete set of monitoring system was established to dynamically track testing settlement and deformation of SHR structure in the whole construction period (2.5 a) by the original data in the test area. The settlement characteristics of a SRC structure were analyzed systematically by actual monitoring results and ABAQUS finite element analysis. The results showed that the overall settlement of the SHR-SRC structure was relatively uniform，and the maximum settlement rate was 0.28 mm / d in the construction process. The positive and negative strain values of the underground test pile near the core tube were small，but far away the core they went by contrary. Under the condition of gentle construction intensity，local "rebound" phenomenon occurred briefly. The simulation showed that the largest displacement occurred at the top of the center pile at the bottom of raft，followed by the side pile，and the smallest displacement occurred at the angle pile. The settlement difference of the same pile indicated that the pile itself had axial compression. However，due to the complex mechanism of the loess and the structure，the related law is still needed to be further investigated and discussed.
Keywords: ultra-thick collapsible loess, Super High Rise-Steel Reinforced Concrete (SHR-SRC) structure, construction, settlement monitoring, original data
JIANG C G，ZHONG J M，HUANG J X，et al. Observation and analysis on time-dependency of building subsidence [J]. Chinese Jour－ nal of Rock Mechanics and Engineering，2004，23(3)：505—509. (In Chinese)
QIAN S Z，FAN Y H. Monitor and analysis of ground subsidence for high-rise building [J]. Journal of Xi’an University of Science and Technology，2014，34(3)：284—289.(In Chinese)
LIU S H，YUAN J Y，ZHAO X. Time-dependent pile reaction force analysis for pile -raft foundation of super high -rise buildings[J]. Chinese Journal of Underground Space and Engineering，2014，10 (S2)：1910—1916.(In Chinese)
LIU S H，YUAN J Y，ZHAO X. Effect of time-dependent settlement of soft clay soil on internal forces in super tall buildings[J]. Journal of Building Structures，2015，36(8)：150—157.(In Chinese)
MA S W. Settlement observation in Shanghai Tower construction process[J]. Building Construction，2015，37(8)：991—993.(In Chinese)
LAN Z Y，LIU Y. Research on the content and technology system of super-high-rise building construction monitoring [J]. Engineering of Surveying and Mapping，2016，25(7)：40—45.(In Chinese)
YUAN C F，LIU Y，LI C M，et al. Analysis of settlement characteristics of an ultrahigh -rise building in the construction process[J]. Science of Surveying and Mapping，2018，42(7)：172—177.(In Chinese)
ZAI J M. Theory and application of composite pile foundation[M]. Beijing：Water Conservancy and Hydropower Press，2004：138— 169.(In Chinese)
TIAN L Y，HUA X S. Settlement prediction for buildings surround－ ing foundation pits based on stationary auto -regression model[J]. Journal of China University of Mining & Technology，2007，17(1)： 78—81.
LU Y Q，ZHAO J G，FENG W，et al. Monitoring and analysis of nat－ ural foundation subsidence of raw coal bunker with big load[J]. Coal Geology & Exploration，2018，46(4)：122—128.(In Chinese)
SHANG Y L，SHI W J，DU S J，et al. Numerical analysis and monitoring research on shield passing through bridge at close range[J]. Journal of Shenyang Jianzhu University(Natural Science)，2018，34(2)：247—256.(In Chinese)
XU J，GONG W M，MU B G，et al. Numerical simulation and monitoring on construction process of deep pit of subway station in soft
cay[J]. Journal of Southeast University(Natural Science Edition)， 2017，47(3)：590—598.(In Chinese)
MA L，ZHAO Y H，MI W J，et al. Study on settlement control effect from lime-loess compaction pile on culvert foundation of high-grade highway [J]. Water Resources and Hydropower Engineering，2018， 49(8)：47—54.(In Chinese)
ZHAO M X，LIU G L，WANG Z W. Monitoring and analysis of high－ way subsidence in Jining [J]. Science of Surveying and Mapping， 2017，42(11)：135—140.(In Chinese)
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