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通过对两起地下室局部抗浮不足的典型案例进行分析,探讨了地下室局部上浮事故产生的原因,并提出了相应的工程设计建议。分析重点包括抗浮水位的确定、底板冲切设计以及裂缝验算等方面。针对沿海地区极端气候强降雨的影响,建议提高抗浮设计水位标高,增加结构冗余度,或采取有效的降水措施以确保地下水位低于设计水位。在设计阶段,强调在防水板建模时考虑水浮力对支座负弯矩的影响,并满足底板迎水面的裂缝控制要求。施工阶段则需严格控制地下水位,并进行建筑物沉降及抗浮监控。这些建议旨在为高水位地区地下室抗浮设计提供科学实用的参考,确保地下室结构在复杂水文地质条件下的安全性和可靠性,减少类似事故的发生。
Abstract:Based on the analysis of two typical cases of insufficient anti-flotation design in basement structures, this study investigates the causes of local buoyancy-induced failures and proposes corresponding engineering design recommendations. The analysis focuses on three critical aspects:determination of anti-flotation water levels,punching shear design of basement slabs,and crack control calculations. Considering the impacts of extreme weather events and heavy rainfall in coastal regions,it is recommended to elevate the design water table for antiflotation purposes,enhance structural redundancy,and implement effective dewatering measures to maintain groundwater levels below the designed threshold. During the design phase,particular emphasis should be placed on modeling the waterproofing slab to account for buoyancy effects on negative bending moments at supports,while ensuring crack control requirements for the water-exposed surfaces of basement slabs.Construction protocols should strictly regulate groundwater levels and implement continuous monitoring of structural settlement and buoyancy resistance. These recommendations aim to establish scientifically validated guidelines for anti-flotation design in high water table regions,ensuring structural safety and reliability under complex hydrogeological conditions while mitigating the recurrence of similar failures.
[1]廖孙静,贺晓英,罗智勇,等.某邻海项目地下室抗浮失效事故分析及处理方法[J].建筑结构,2022,52(S1):2278-2281.
[2]万样,彭畅.某中庭式地下室上浮开裂研究与加固设计[J].建筑科学,2024,40(9):128-134.
[3]蒙瑜,赵轩.地下室抗浮设计中的问题研究[J].建筑结构,2021,51(S1):2173-2176.
[4]黄健,光军.建筑结构的抗浮设计探讨[J].建筑结构,2021,51(10):135-139.
[5]王公胜,孙文,张志江,等.建筑地下结构渗漏原因与控制措施分析[J].建筑结构,2021,51(2):103-107.
[6]赵庆强.复杂地质条件下地下室基础抗浮锚杆后置施工技术应用分析[J].广东土木与建筑,2015,22(2):23-26+11.
[7]路彦,龚杰,蓝海江.既有建筑地下室局部抗浮失效实例分析及加固处理[J].广东土木与建筑,2014,21(12):27-28+23.
[8]建筑结构检测技术标准:GB/T 50344—2019[S].北京:中国建筑工业出版社,2020.
[9]建筑地基基础设计规范:GB 50007—2011[S].北京:中国建筑工业出版社,2012.
[10]混凝土结构设计规范(2015年版):GB/T 50010—2010[S].北京:中国建筑工业出版社,2015.
基本信息:
DOI:10.19731/j.gdtmyjz.2025.05.016
中图分类号:TU943
引用信息:
[1]张雅融.地下室局部抗浮不足的原因分析[J].广东土木与建筑,2025,32(05):62-63+78.DOI:10.19731/j.gdtmyjz.2025.05.016.
基金信息: