• 船舶海洋与建筑工程 •

### 隧道周围饱和软土二维非线性固结分析

1. 1.浙江大学 滨海和城市岩土工程研究中心, 杭州 310058
2.浙江省建筑设计研究院, 杭州 310006
3.浙江大学建筑设计研究院有限公司, 杭州 310028
4.浙江大学平衡建筑研究中心, 杭州 310028
5.浙江科技学院 土木与建筑工程学院, 杭州 310023
• 收稿日期:2022-06-21 修回日期:2022-08-01 接受日期:2022-08-16 出版日期:2023-12-28 发布日期:2023-12-29
• 通讯作者: 肖志荣,女,副教授;E-mail:100106@zust.edu.cn.
• 作者简介:胡安峰(1974-),教授,博士生导师,从事桩基工程、软黏土力学、近海岩土工程及深度学习理论在岩土工程中的应用研究.
• 基金资助:
国家自然科学基金(51978612)

### Two Dimensional Nonlinear Consolidation Analysis of Saturated Soft Soil Around Tunnel

HU Anfeng1,3, GONG Zhaoqi2,4, XIAO Zhirong5(), CHEN Yuan1

1. 1. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China
2. Zhejiang Province Architectural Design and Research Institute, Hangzhou 310006, China
3. Architectural Design and Research Institute of Zhejiang University Co., Ltd., Hangzhou 310028, China
4. Center for Balance Architecture, Zhejiang University, Hangzhou 310028, China
5. School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310023, China
• Received:2022-06-21 Revised:2022-08-01 Accepted:2022-08-16 Online:2023-12-28 Published:2023-12-29

Abstract:

Considering the nonlinear changes of compressibility and permeability of soft soil around the tunnel, a two-dimensional nonlinear seepage consolidation control equation is established, which is solved by an alternating implicit difference method, and the development law of the average degree of consolidation with time under the three conditions of complete permeability, complete impermeability, and semi permeability of the tunnel is obtained. By comparing the degenerate solution with the existing analytical solution, the correctness of the difference solution is verified. In addition, the effects of compression index Cc and permeability index Ck on the consolidation degree of soft soil around the tunnel are analyzed. The results show that the permeability of tunnel is an important factor affecting the development and change of consolidation degree. The influence of compression index Cc on the development of degree of consolidation is less than that of permeability index Ck. Seepage consolidation will change the effective stress field of the soil around the tunnel, and the average degree of consolidation decreases with the increase of permeability index Ck. If the nonlinearity of soil is not considered, there will be a large error in the calculation of degree of consolidation.