PC桩加型钢支撑在基坑支护中的优化研究  

APPLICATION OF PC COMBINED PILE AND STEEL BRACING IN FOUNDATION PIT SUPPORT DESIGN OPTIMIZATION

作　　者：崔连杰 何寨兵 曾怡婷 徐长节[3,4] 胡琦[5] 刘兴旺[6] CUI Lianjie;HE Zhaibing;ZENG Yiting;XU Changjie;HU Qi;LIU Xingwang(College of Engineering,Zhejiang University,Hangzhou 310015,China;Huhang Railway Co.,Ltd.,Hangzhou 310000,China;School of Architectural Engineering,Zhejiang University,Hangzhou 310058,China;School of Civil Architecture,East China Jiaotong University,Jiangsu Nanchang 330013,China;School of Architectural Engineering,Zhejiang University of Technology,Hangzhou 310014,China;Zhejiang Institute of Architectural Design,Hangzhou 310006,China)

机构地区：[1]浙江大学工程师学院,杭州310015 [2]湖杭铁路有限公司,杭州310000 [3]浙江大学建筑工程学院,杭州310058 [4]华东交通大学土木建筑学院,江苏南昌330013 [5]浙江工业大学建筑工程学院,杭州310014 [6]浙江省建筑设计研究院,杭州310006

出　　处：《低温建筑技术》2021年第3期82-87,共6页Low Temperature Architecture Technology

基　　金：浙江省自然科学基金委员会-华东院联合基金(LHZ19E080001);国家杰出青年科学基金(51725802);国家自然科学基金(51878276)。

摘　　要：随着我国城镇化的水平不断推进,基坑开挖中出现了很多难题,比如在保证施工安全的同时,如何减小基坑开挖对临近建筑的影响;比如在保证基坑开挖对临近建筑的影响合理的同时,如何降低整个项目的工程造价等。文中介绍了PC工法组合钢管桩结合混凝土撑组合支撑在杭州某基坑围护设计方案中的优化,优化方案调整了部分区域的围护形式并采用了PC工法桩施工工艺,使得施工开挖更方便,也更经济,并用Plaxis2D有限元软件对两方案进行了对比分析,可以为实际工程中的优化设计提供参考。With the development of new urbanization and the flexibility of urban construction in China,more problems exist in foundation pit engineering,including reduction on the impact of deep foundation pit on the surrounding existing construction facilities under the premise of ensuring the safety of deep foundation pit,control of the impact of adjacent construction facilities within a reasonable warning value range,the construction cost reduction of deep foundation pit support,etc.This paper introduces the optimization of PC method composite steel pipe pile combined with hairpin brace composite support in a foundation pit enclosure design scheme in Hangzhou city.The optimization scheme adjusts the enclosure form of some areas and adopts PC method pile construction technology,which makes the construction excavation more convenient and economical.The two schemes are carried out with Plaxis3D finite element software.The comparative analysis may provide reference for the optimization design in practical engineering.

关 键 词：基坑 PC工法桩 围护方案 优化 

分 类 号：TU473.1[建筑科学—结构工程]