考虑前期填土变形时空效应下的高层山地建筑桩基偏位特性研究  

The Deflection Characteristics of Pile Foundation in High-rise Mountain Building Considering the Spatiotemporal Effects of Pre-fill Deformation

作　　者：杨岳峰 YANG Yuefeng

机构地区：[1]福建省建筑科学研究院有限责任公司、福建省绿色建筑技术重点实验室,福建福州350108 [2]福建省建研工程顾问有限公司,福建福州350108

出　　处：《福建建设科技》2024年第4期69-73,共5页Fujian Construction Science & Technology

基　　金：2022年福建省住房和城乡建设厅科学技术计划项目(2022-K-141、2022-K-146);科技项目:福厦泉国家自主创新示范区滨海地下工程群抗浮关键技术研发与产业化协同创新平台项目(3502ZCQXT2022002)。

摘　　要：基于Burgers粘弹性本构关系,建立了考虑前期填土变形时空效应下的数值模型,通过对高填方建筑倾斜过程的反演分析,验证了模型的正确性和可靠性的同时,进一步研究了前期填土不同的静置时间对高层建筑及桩基的偏位影响。结果表明:不考虑前期填土变形时间效应情况下,建筑倾斜值极小,而考虑新近填土和施工时序影响下的负摩阻力和不均匀沉降将显著增大。随着前期填土静置时间的增加,前期填方因自重作用下的剩余沉降逐步减小,建筑倾斜现象也随之减弱。其研究成果应可对高填方山地建筑变形的反演分析和建筑偏位防治的研究提供有益的借鉴和参考。Based on the Burgers viscoelastic constitutive model,a numerical model considering the time-space effect of pre-fill deformation is established.Through the inversion analysis of the inclination process of mountain high-rise buildings,the correctness and reliability of the model are verified.At the same time,the influence of different pre-filling standing time on the deflection of high-rise buildings and pile foundations is further studied.The results show that the building inclination value is very small without considering the time effect of pre-fill deformation,while the negative friction force and uneven settlement will increase significantly under the influence of pre-fill deformation and construction sequence.With the increase of the standing time of the pre-filled soil,the residual settlement of the pre-filled soil under the action of self-weight gradually decreases,and the phenomenon of building inclination also weakens.The research results can provide useful reference for the inversion analysis of high fill mountain building deformation,as well as the prophylaxis and treatment of building deviation.

关 键 词：Burgers本构关系 高填方 山地建筑 建筑倾斜 桩基 反演分析 

分 类 号：TU473.1[建筑科学—结构工程]