岩体地基抗剪刚度系数试验研究  

Experimental Investigation on Shear Stiffness Coefficient of Rock Mass Foundation

作　　者：吕东 许卫晓[1,2] 李翠翠 杨伟松 杨淑娟 王向英[1] LYUDong;XU Weixiao;LI Cuicui;YANG Weisong;YANG Shujuan;WANG Xiangying(Qingdao University of Technology,Qingdao,Shandong266520,China;Engineering Research Center of Concrete Technology Under Marine Environment,Ministry of Education,Qingdao,Shandong266520,China;Qingjian Group Co.,Ltd.,Qingdao,Shandong266071,China)

机构地区：[1]青岛理工大学,山东青岛266520 [2]海洋环境混凝土技术教育部工程研究中心,山东青岛266520 [3]青建集团股份公司,山东青岛266071

出　　处：《施工技术（中英文）》2024年第7期124-129,135,共7页Construction Technology

基　　金：山东省自然科学基金(ZR2020ME246,ZR2022ME029)。

摘　　要：地基抗剪刚度系数反映了地基对上部结构在水平方向的约束强弱程度,直接影响地基上浇筑的混凝土结构温度约束应力的大小,是控制混凝土底板温度裂缝的关键参数之一。为完善温度约束应力计算中地基抗剪刚度系数的取值,基于岩体地基防水层底板温度应力监测现场试验,计算得到岩体地基防水层构造条件下地基抗剪刚度系数取值;而后进行了岩体地基上的防水层、垫层、滑动层3种构造条件的动力特性测试试验,基于量纲分析计算出了垫层和滑动层构造条件下的地基抗剪刚度系数取值。The shear stiffness coefficient of the foundation,which reflects the constraint strength of the foundation to the superstructure in the horizontal direction,directly affects the temperature constraint stress of the concrete structure poured on the foundation and is one of the key parameters to control the temperature crack of the concrete floor.To improve the value of the shear stiffness coefficient of the foundation in the calculation of temperature constraint stress,the value of the shear stiffness coefficient of the foundation under the condition of the waterproofing layer structure of the rock foundation is calculated based on the field test of the temperature stress monitoring of the bottom plate of the waterproofing layer of the rock foundation.Then,the dynamic characteristics test of three structural conditions—the waterproofing layer,cushion layer and sliding layer—on the rock mass foundation is carried out.The value of the shear stiffness coefficient of the foundation under the conditions of the cushion layer and sliding layer is calculated based on dimensional analysis.

关 键 词：地基 抗剪刚度 温度约束应力 混凝土 底板 试验 

分 类 号：TU431[建筑科学—岩土工程]