复杂地质情况下筏板基础方案比选和结构设计  

Comparison and structural design of raft foundation schemes under complex geological conditions

作　　者：何周全 HE Zhouquan(Jiabo United Design Co.,Ltd,Fuzhou 350011)

机构地区：[1]嘉博联合设计股份有限公司,福建福州350011

出　　处：《福建建筑》2025年第1期37-40,69,共5页Fujian Architecture & Construction

摘　　要：为了研究复杂地质条件下筏板基础的设计要求,对宁德某高水位地基项目进行方案设计。对筏板基础的设计原则进行总结,并结合工程项目高水位的特点,进行灌注桩和筏板基础两种方案的设计论证。通过对比分析和数值计算可知,在桩长较长的情况下,筏板基础具有更好的经济性。此外,对筏板基础设计方案下的土层承载力、沉降量和筏板抗冲切性能进行验算。通过研究可知,筏板基础以砂土状强风化花岗岩做持力层,满足承载力和沉降量控制要求。由于筏板部分具有薄弱环节,在设计时需要考虑对局部筏板进行加厚处理,以保证筏板基础的安全。In order to study the design requirements of raft foundation under complex geological conditions,a scheme design was carried out for a high water level foundation project in Ningde.Summarize the design principles of raft foundation and demonstrate the design of two schemes,namely cast-in-place pile and raft foundation,based on the characteristics of high water level in engineering projects.Through comparative analysis and numerical calculations,it can be concluded that raft foundation has better economy when the pile length is longer.In addition,the soil bearing capacity,settlement,and raft shear resistance performance under the raft foundation design scheme are verified.Through research,it is known that the raft foundation is supported by a strongly weathered granite layer in the form of sandy soil,which meets the requirements for bearing capacity and settlement control.Due to the weak links in the raft section,it is necessary to consider thickening the local raft during design to ensure the safety of the raft foundation.

关 键 词：筏板基础 承载力验算 方案对比 局部加强 

分 类 号：TU3[建筑科学—结构工程]