深度修正后有黏结强度的复合地基增强体所受荷载的探讨  

The discussion of load on composite foundation reinforcement with cohesive strength after depth correction

作　　者：郭小红[1] 周载阳[1] GUO Xiao-hong;ZHOU Zai-yang(China Institute of Geotechnical Investigation and Surveying Co.,Ltd.,Beijing 100007,China)

机构地区：[1]建设综合勘察研究设计院有限公司,北京100007

出　　处：《地基处理》2024年第1期104-106,共3页Journal of Ground Improvement

摘　　要：通过研究《建筑地基处理技术规范》(JGJ 79—2012)中有黏结强度的复合地基承载力特征值的估算公式,本文对修正后的有黏结强度的复合地基承载力特征值及增强体承载力进行了推导计算,得出按基础埋深修正后复合地基增强体实际承担的荷载大于按照规范公式估算得出的单桩承载力特征值,并给出了二者之间的关系式。增强体桩身强度作为复合地基能够正常工作的必要条件,须按照实际的基底压力进行强度验算。本文对修正后增强体桩身强度的验算进行了探讨,提出了与规范不同的验算公式。In this work,an analysis is conducted on the calculation formula stipulated in Technical Code for Ground Treatment of Buildings(JGJ 79-2012)to determine the characteristic value of composite foundation bearing capacity inclusive of cohesive strength.The derived outcomes encompass the modified bearing capacity characteristic value of cohesive composite foundation along with the bearing capacity assessment pertaining to the reinforcement elements.The investigation reveals that the actual load sustained by the reinforcement of the composite foundation,subsequent to depth correction,surpasses the characteristic value derived from the formula of preliminary design for single pile bearing capacity.Consequently,the study delineates the correlation between these two values.It becomes evident that the effectiveness of the composite foundation hinges upon the strength of the reinforcement,mandating a thorough evaluation against the actual foundation pressure.This work addresses the computation of the modified strength of the reinforcement,proposing an alternative calculation formula distinct from the one outlined in the technical code.

关 键 词：深度修正 有黏结强度 复合地基增强体 桩身强度验算 

分 类 号：TU470[建筑科学—结构工程]