软岩嵌岩桩承载特性及承载力计算分析  

Calculation and Analysis of Bearing Capacity of Soft Rock Socketed Pile

作　　者：丁国辉 蒋专成 秦甜甜 DING Guohui;JIANG Zhuancheng;QIN Tiantian(Nanjing Insititute of Surveying,Mapping&Geotechnical Investigation,Co.,Ltd.,Nanjing 210000,China;Geological Survey of Jiangsu Province,Nanjing 210018,China)

机构地区：[1]南京市测绘勘察研究院股份有限公司,江苏南京210000 [2]江苏省地质调查研究院,江苏南京210018

出　　处：《城市勘测》2024年第1期205-208,共4页Urban Geotechnical Investigation & Surveying

摘　　要：南京软岩分布地区,对于嵌岩桩单桩竖向承载力估算,勘察设计单位采用的规范和计算公式不同,导致了估算结果差异较大。根据不同规范公式估算嵌岩桩的单桩竖向承载力,并通过其承载性状的对比分析表明,不同规范公式反映的桩基承载性状差异较大。经过与试桩结果对比分析,当岩石强度及嵌岩深度较小时,采用南京规范公式计算的单桩竖向极限承载力与试桩结果较为接近;当岩石强度及嵌岩深度均较大时,采用两种规范计算结果的平均值更加接近试桩。对类似软岩分布地区嵌岩桩基础设计施工具有参考意义。In the soft rock distribution area of Nanjing,for the estimation of the vertical bearing capacity of rock-socketed pile,the norms and calculation formulas adopted by the survey and design institutes are different,resulting in a large difference in the estimation results.The vertical bearing capacity of rock-socketed pile is estimated according to different standard formulas,and the comparative analysis of its bearing properties shows that the bearing properties of pile foundation reflected by different standard formulas are quite different.Comparing with the test pile results,it can be obtained that when the rock strength and rock-socking depth are small,the vertical ultimate bearing capacity of single pile calculated by Nanjing standard formula is close to the test results;and when the strength of rock and the depth of rock embedment are large,the average values calculated by using the two codes are closer to the test pile.It has reference significance for the design and construction of rock-socketed pile foundation in similar soft rock distribution areas.

关 键 词：软岩 嵌岩桩 承载特性 单桩竖向承载力 

分 类 号：TU473.11[建筑科学—结构工程]