既有建筑下地基承载力的原位试验方法研究  

In-situ Test Method for Bearing Capacity of Foundation under Existing Buildings

作　　者：张凤海 谢小荣 曹家强 孙晓禹 ZHANG Feng-hai;XIE Xiao-rong;CAO Jia-qiang;SUN Xiao-yu(Guangzhou Testing Centre of Construction Quality and Safety Co.,Ltd.,Guangzhou 510440;Guangzhou Institute of Building Science Group Co.,Ltd.,Guangzhou 510440)

机构地区：[1]广州建设工程质量安全检测中心有限公司,广州510440 [2]广州市建筑科学研究院集团有限公司,广州510440

出　　处：《广州建筑》2025年第2期13-17,共5页GUANGZHOU ARCHITECTURE

基　　金：广州市建筑科学研究院集团有限公司科技进步资金项目(17J00481)。

摘　　要：既有建筑下地基基础的鉴定是当前房屋鉴定工作的难点,既有建筑下的基础很难直接进行承载力检测,比较可行的办法是通过开挖查明基础形式、通过勘察手段获取比较可靠的工程地质资料来验算地基基础承载力。为了确定既有建筑下不同土层地基承载力的最优原位试验方法及其数据应用方法,对确定地基承载力的原位试验方法进行研究。本文主要以广州市荔湾区某工程项目既有建筑地基基础检验鉴定为例,应用静力触探试验、标准贯入试验等原位试验方法对该建筑地基基础的承载力进行分析与研究,结果表明,选择静力触探试验和标准贯入试验对地基承载力特征值进行验算,两者结果相互印证,试验效果较好,满足鉴定要求。优先采用这两种原位试验方法,可以提高既有建筑下地基基础鉴定的准确性和科学性,推动鉴定行业的技术发展与进步。The appraisal of foundation under existing buildings is a difficult task in the current appraisal of buildings.It is difficult to directly test the bearing capacity of foundation under existing buildings.The more feasible way is to find out the foundation form through excavation and obtain more reliable engineering geological data by means of investigation to check the bearing capacity of foundation.In order to determine the optimal in-situ test method and data application method for determining the bearing capacity of different soil layers under existing buildings,the in-situ test method for determining the bearing capacity of foundation is studied.In this paper,taking the foundation inspection and appraisal of an existing building in Liwan District of Guangzhou as an example,cone penetration test and standard penetration test are used to analyze and study the bearing capacity of the foundation.The results show that cone penetration test and standard penetration test are selected to check the characteristic value of the bearing capacity of the foundation,and the two results are mutually verified.The test results are good and meet the requirements of identification.Priority to these two in-situ test methods can improve the accuracy and scientificity of foundation appraisal under existing buildings,and promote the technical development and progress of appraisal industry.

关 键 词：既有建筑 地基基础鉴定 地基承载力 静力触探试验 标准贯入试验 

分 类 号：TU375[建筑科学—结构工程]