(1 启迪设计集团股份有限公司, 苏州 215021; 2 中海企业集团苏州公司, 苏州 215021)

摘要: 以苏州某坡地建筑地下室为工程背景,结合山脚下高差较大的场地条件,采用了阶梯式地下室建筑方案.以场地土层为微透水层的条件,采用主动的疏水降压减浮的设计方案. 经过对地下室基坑渗流量及雨水下渗量的计算分析,结合合理的疏水盲沟布置及可靠的后期运行管理,探讨了该方案的技术可行性. 介绍了疏水降压减浮设计方案应用时对建筑、设备、基坑支护、景观、海绵城市等多专业设计提出的相关要求,以及盲沟及地下室肥槽回填施工、盲沟维护、应急预案处理及物业管理等方面的一系列要求及保障措施. 结果表明,疏水降压减浮设计方案长期有效,可以确保结构安全.

关键词: 坡地建筑; 地下室; 疏水降压减浮; 疏水盲沟; 抗浮设计; 盲沟维护

中图分类号: TU318 文献标志码:A 文章编号:1002⁃848X(2022)07⁃0105⁃06

DOI:10. 19701 / j.jzjg.SZY2108

Design and analysis of drainage depressurization and floatation reductionin the basement of a building on a slope

CAO Yankai1, YUAN Xuefen1, ZHANG Min1, LU Chunhua1, SU Peng1, ZHAO Yiqing2

(1 Tus⁃Design Group Co., Ltd., Suzhou 215021, China;2 China Overseas Development Group Co., Ltd., Suzhou 215021, China)

Abstract: Taking the basement of of a building on a slope in Suzhou as the engineering background, combined with the siteconditions with a large height difference at the foot of the mountain, a stepped basement building scheme was adopted.Under the condition that the soil layer of the site is a micro⁃permeable layer, the design scheme of active drainagedepressurization and floatation reduction was adopted. After the calculation and analysis of the seepage flow of thefoundation pit and the infiltration of rainwater, combined with the reasonable layout of the drainage blind ditch and thereliable later operation management, the technical feasibility of the scheme was discussed. When the design scheme ofdrainage depressurization and floatation reduction was used, the relevant requirements of this scheme for multi⁃professionaldesign such as buildings, equipment, foundation pit support, landscape, and sponge city were introduced. A series ofrequirements and safeguards for blind ditch and basement fertilizer tank backfill construction, blind ditch maintenance,emergency plan handling and property management were introduced. The results show that the design scheme of drainagedepressurization and floatation reduction is effective for a long time and can ensure the safety of the structure.

Keywords:building on a slope; basement; drainage depressurization and floatation reduction; blind drainage ditch; antifloating design; blind ditch maintenance

第一作者:曹彦凯,学士,高级工程师,一级注册结构工程师,主要从事大型综合体、大跨结构、复杂高层等结构设计研究,Email:yankai.cao@ tusdesign.com.

[引用本文] 曹彦凯,袁雪芬,张敏,等. 某坡地建筑地下室疏水降压减浮设计分析[ J].建筑结构,2022,52(7):105⁃110. CAO Yankai,YUAN Xuefen,ZHANG Min,et al. Design and analysis of drainage depressurization and floatationreduction in the basement of a building on a slope[J]. Building Structure,2022,52(7):105⁃110.