|
| Study on constitutive model of root soil complex based on mixture rule |
| Received:October 02, 2022 Revised:December 23, 2022 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20221002001 |
| KeyWord:root soil complex constitutive model Duncan Chang model linear elastic model |
| Author | Institution |
| 蒋希雁 |
河北建筑工程学院 土木工程学院, 张家口 ;河北省土木工程诊断改造与抗灾重点实验室, 张家口 ;河北省寒冷地区交通基础设施工程技术创新中心, 张家口 |
| 王万梅 |
河北建筑工程学院 土木工程学院, 张家口 ;河北省土木工程诊断改造与抗灾重点实验室, 张家口 ;河北省寒冷地区交通基础设施工程技术创新中心, 张家口 |
| 刘杰 |
河北建筑工程学院 土木工程学院, 张家口 ;河北省土木工程诊断改造与抗灾重点实验室, 张家口 ;河北省寒冷地区交通基础设施工程技术创新中心, 张家口 |
| 刘嘉璐 |
河北建筑工程学院 土木工程学院, 张家口 ;河北省土木工程诊断改造与抗灾重点实验室, 张家口 ;河北省寒冷地区交通基础设施工程技术创新中心, 张家口 |
| 张喆 |
河北建筑工程学院 土木工程学院, 张家口 ;河北省土木工程诊断改造与抗灾重点实验室, 张家口 ;河北省寒冷地区交通基础设施工程技术创新中心, 张家口 |
| 阮梦柯 |
河北建筑工程学院 土木工程学院, 张家口 ;河北省土木工程诊断改造与抗灾重点实验室, 张家口 ;河北省寒冷地区交通基础设施工程技术创新中心, 张家口 |
|
| Hits: 166 |
| Download times: 137 |
| Abstract: |
| In order to explore the stress-strain relationship of a root soil complex,it is considered as a two-phase body.A linear elastic model is used for the root system,and the Duncan-Chang model is used for the soil.Considering the relative slip relationship between the root system and the soil,the constitutive model of the root soil complex is established based on the mixture rule.Through the triaxial compression test of plain soil and root soil complex with different root contents,the stress-strain relationship is obtained.The elastic modulus of the root is obtained through the single root tensile test.The results show that (1) the ultimate principal stress difference of the root soil composite increases first and then decreases with the increase of root content,and the optimal root content was 0.3%.(2) The diameter of a single root conforms to the power function relationship with the tensile strength,and to the polynomial relationship with the elastic modulus.(3) Through the inverse analysis method,the slip relationship is established.The stress-strain relationship of the calculated value of the model is obtained.It is found that the fitting accuracy (R2) of the calculated value of the model and the test value is 0.96.This study provides a new idea for the establishment of the constitutive model of root soil composite,and provides parameters for the numerical analysis of a root soil complex. |
|
|
|