深层平板载荷试验变形模量计算新方法  

A new method for calculating deformation modulus of deep plate load test

作　　者：尚许雯 尚银生 贾迎泽 杨进堂 孙存珠 Shang Xuwen;Shang Yinsheng;Jia Yingze;Yang Jintang;Sun Cunzhu(Shanxi Province Transport Planning Survey and Design Institute Limited Company,Taiyuan 030012,China;Shanxi Province Survey and Design Institute Limited Company,Taiyuan 030013,China;Shanxi Academy of Building Research Co.,Ltd.,Taiyuan 030001,China)

机构地区：[1]山西省交通规划勘察设计院有限公司,山西太原030012 [2]山西省勘察设计研究院有限公司,山西太原030013 [3]山西省建筑科学研究院有限公司,山西太原030001

出　　处：《山西建筑》2020年第8期1-4,共4页Shanxi Architecture

摘　　要：根据Mindlin课题解析解,结合深层平板载荷试验的尺寸确定及试验深度等技术要求,提出一个新的计算变形模量公式。当μ=0.00~0.50;z=5.0 m,10.0 m及趋于无穷大时(工程意义上或d z,d/22z),其相应于修正系数的部分,在不大于0.500的范围内,随土类的泊松比增大而增大,其值介于0.375~0.500;高氏修正系数在不小于0.500的范围内,随土类泊松比的增加而增加,其值介于0.500~0.902;顾氏修正系数随试验深度的增加而减小,其值介于0.500~0.555。并指出现行《岩规》推荐的深层平板载荷试验变形模量计算方法建立过程不够严谨,不能满足有关技术要求。According to the analytical solution of Mindlin project,combined with the technical requirements of the size determination and test depth of the deep plate load test,a new formula for calculating the deformation modulus is proposed.Whenμ=0.00~0.50;z=5.0 m,10.0 mand tends to infinity(in engineering sense or d z,d/22z),the part corresponding to the correction coefficient increases with the increase of Poisson’s ratio within the range of≤0.500,and its value is between 0.375~0.500;the Gao’s correction coefficient increases with the increase of Poisson’s ratio within the range of≥0.500,and its value is between 0.500~0.902;the Gu’s correction coefficient increases with the increase of Poisson’s ratio The coefficient decreases with the increase of test depth,and its value is between 0.500 and 0.555.It is pointed out that the calculation method of deformation modulus of deep plate load test recommended by the current Rock Code is not rigorous enough to meet the relevant technical requirements.

关 键 词：深层平板载荷试验 变形模量 Mindlin解析解 泊松比 修正系数 

分 类 号：TU413.4[建筑科学—岩土工程]