建筑物深基坑预制桩支护结构施工研究  

RESEARCH ON CONSTRUCTION OF PRECAST PILE SUPPORTING STRUCTURE IN DEEP FOUNDATION PIT OF BUILDINGS

作　　者：顾金海 GU Jin-hai(Third Construction Co.,Ltd.of China Construction Eighth Engineering Bureau,210000,Nanjing,China)

机构地区：[1]中建八局第三建设有限公司,南京210000

出　　处：《建筑技术》2023年第20期2463-2466,共4页Architecture Technology

摘　　要：建筑物在深基坑施工过程中,受反作用力影响,容易出现施工位移。为解决上述问题,以长江下游冲积平原工程为研究对象,设计一种建筑物深基坑预制桩支护结构施工方法。对基坑开挖数值进行模拟,确定数值模拟结果,分析挖掘过程中造成的形变,根据模拟状态确定施工过程中产生的位移,对土体所受的压力情况进行深入研究,根据结果设定预制桩支护结构,利用支护结构特有的阶梯式支护模式减少施工位移。研究结果表明:建筑物深基坑预制桩支护结构施工方法能够有效减少施工过程中产生的施工位移,当施工压力达到100 MPa时,产生的位移小于0.01 m,不会对施工工程造成影响,有效提高了施工安全性。During the construction of deep foundation pits,buildings are prone to displacement by reaction force.To address this problem,a construction method using a prefabricated pile support structure for deep foundation pits of buildings is designed based on the research of the alluvial plain project in the lower reaches of Changjiang River.In the research,the excavation value of foundation pits was simulated,numerical simulation results were obtained,the deformation caused by excavation was analyzed,the displacement generated from construction was determined based on the simulation conditions,an in-depth study was carried out toward the pressure on the soil,and then a prefabricated pile support structure was developed according to the results to reduce the construction displacement by using the unique stepped support mode of the support structure.The research results show that the construction method using a prefabricated pile support structure for deep foundation pits of buildings can effectively reduce the displacement caused by construction;when the construction pressure reaches 100 MPa,the resultant displacement is less than 0.01 m,which has no harmful effect on the construction project,thereby elevating the safety of construction effectively.

关 键 词：建筑物深基坑 预制桩支护 支护结构 支护施工 

分 类 号：TU753[建筑科学—建筑技术科学]