【摘要】：由水泥土樁與預(yù)應(yīng)力抗拔管樁組合所形成的勁性復(fù)合樁用于大型多層商業(yè)綜合體建筑的抗浮構(gòu)件,在國內(nèi)外尚屬首次。本文通過既有勁性復(fù)合抗拔管樁的承載機(jī)理分析、校核與對(duì)比,指出設(shè)計(jì)勁性復(fù)合抗拔樁存在承載力不足、耐久性缺陷,以及主導(dǎo)規(guī)程依據(jù)缺失等問題;根據(jù)靜載試驗(yàn)樁與實(shí)際勁性復(fù)合抗拔樁受力工況條件對(duì)比分析,得出實(shí)際勁性復(fù)合樁的抗拔承載力特征值小于靜載試驗(yàn)結(jié)果的結(jié)論;并依據(jù)分析結(jié)果,對(duì)樁基結(jié)構(gòu)進(jìn)行處置改進(jìn),使柱下獨(dú)立承臺(tái)群樁基礎(chǔ)呈群樁整體破壞,而勁性復(fù)合樁中的剛性管樁與灌芯組合結(jié)構(gòu),以及剛性樁與承臺(tái)節(jié)點(diǎn)不發(fā)生破壞,此時(shí),可滿足設(shè)計(jì)抗浮承載能力的要求。
[Abstract]:It is the first time at home and abroad that the rigid composite pile formed by the combination of cement-soil pile and prestressed pipe-pulling pile is used in the anti-floating component of large-scale multi-storey commercial complex building. Based on the analysis, check and comparison of the bearing mechanism of the existing composite anti-pull pipe pile, it is pointed out that there are some problems in the design of the composite anti-pull pile, such as the insufficient bearing capacity, the durability defect, and the lack of the leading rules. According to the comparison and analysis between static load test pile and actual strength composite pile under load condition, it is concluded that the characteristic value of pull-out bearing capacity of actual composite pile is smaller than that of static load test. According to the result of analysis, the structure of pile foundation is improved, so that the pile foundation of independent cap pile group under the column is destroyed as a whole, but the composite structure of rigid pipe pile and grouting core in the rigid composite pile, and the joint of rigid pile and cap are not destroyed. At this time, the design can meet the requirements of anti-floating bearing capacity.
【作者單位】： 南通建工集團(tuán)股份有限公司;
【分類號(hào)】：TU473.1

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本文編號(hào)：2438315