基于自稳式支护结构的复合型商业建筑深基坑施工技术  

Deep excavation construction technique of composite commercial building based on self-stable supporting structure

作　　者：凌礼贤 姜俊杰 林国潮 Ling Lixian;Jiang Junjie;Lin Guochao(China Construction Seventh Engineering Division Co.,Ltd.,Zhengzhou 450004,China)

机构地区：[1]中国建筑第七工程局有限公司,郑州450004

出　　处：《工程勘察》2021年第4期16-22,共7页Geotechnical Investigation & Surveying

摘　　要：在复合型商业建筑深基坑施工.中,基坑土体会产生相反的应力,使基坑出现水平位移,导致工程施工难度加大,因此提出了基于自稳式支护结构的复合型商业建筑深基坑施工技术。首先,计算复合型商业建筑深基坑施工土压力,依据土压力情况,设计自稳式支护结构。在深基坑多层开挖施工中,使用自稳式支护结构进行阶梯式支护,保证每层都可以建立倒运平台,并利用TRD工法建造防水帷幕,解决深基坑施工过程中地下水渗漏的问题,通过以上技术完成深基坑施工。为了分析这种设计技术的实际可行性,结合工程实例进行分析,并通过布置水平位移监测点监测水平位移情况。结果表明,使用这种施工技术能够有效减小基坑水平位移,满足施工设计要求。In the process of deep excavation of a complex commercial building,horizontal displacement caused by the ground lateral force will increase the difficulty in the basement construction.Therefore,the construction technique of deep excavation of complex commercial building based on self-stable supporting structure is proposed.The soil pressure in deep excavation is calculated firstly,and the self-stable supporting structure is designed according to the soil pressure.In the excavation from top to bottom by layer,the stepped support is carried out by self-stable support structure,so as to ensure that each layer can be used as temporary working terrace,and the trench cutting re-mixing deep(TRD)wall is constructed to cut off groundwater.The deep excavation is completed depending on these skills.In order to verify the feasibility of the design,the horizontal displacement monitoring is performed for a engineering case.The results show that the design could effectively reduce the horizontal displacement in the excavation and could meet the requirements of construction.

关 键 词：自稳式支护结构 复合型商业建筑 深基坑 土体压力 排桩 防水帷幕 

分 类 号：TU753[建筑科学—建筑技术科学]