沉管隧道块石垫层振密试验与颗粒流模拟研究

付佰勇; 宋神友; 金文良

doi:10.3973/j.issn.2096-4498.2025.06.004

隧道建设 >

2025 , Vol. 45 >Issue 6: 1090 - 1101

DOI: https://doi.org/10.3973/j.issn.2096-4498.2025.06.004

研究与探索

沉管隧道块石垫层振密试验与颗粒流模拟研究

付佰勇 ,
宋神友 ,
金文良

展开

（1. 清华大学土木工程系，北京 100084; 2. 中交公路长大桥建设国家工程研究中心有限公司，北京 100120； 3. 深中通道管理中心，广东中山 528400）

付佰勇(1983—)，男，山东临沂人，2008年毕业于同济大学,岩土工程专业,硕士,正高级工程师,主要从事桥梁深水基础和沉管隧道沉降控制技术研究工作。 E-mail: 15001000431@163.com。

网络出版日期: 2025-06-20

收起

Vibrodensification Test and Particle Flow Simulation of Rock Cushion in Immersed Tunnels

FU Baiyong ,
SONG Shenyou ,
JIN Wenliang

Expand

(1. Department of Civil Engineering, Tsinghua University, Beijing 100084, China; 2. CCCC Highway Bridges National Engineering Research Center Co., Ltd., Beijing 100120, China; 3. Shenzhong Link Management Center, Zhongshan 528400, Guangdong, China)

Online published: 2025-06-20

Fold

摘要

为解决沉管隧道振密块石垫层在水中作业时存在平整度、振密参数、振密后块石质量不确定性等问题，依托深中通道沉管隧道工程，对块石垫层的振密效果进行现场试验及颗粒流数值模拟研究，分析振密时间、垫层厚度、振密频率3个因素对块石垫层振密效果的影响，并从强接触力链等细观角度解释各因素影响的内在原因。研究表明： 1）垫层厚度是影响块石垫层振沉量的主要因素，振动频率会影响块石垫层振沉量，存在某一临界频率使得振密率最大，因此振动频率不宜过慢或过快。2）当块石粒径在0.15~0.30 m均匀连续分布时，在垫层厚度1.2 m、振动频率20 Hz的情况下，振密45 s比振密20、30 s的块石振密效果好；在垫层厚度为1.2 m、振密时间为45 s时，振动频率20 Hz比振动频率10、30 Hz的振密效果好；当振动频率为20 Hz、振密时间为45 s时，建议垫层厚度在1.2 m以上。

关键词： 块石垫层; 沉管隧道; 振密试验; 颗粒流模拟; 静载试验

本文引用格式

付佰勇 , 宋神友 , 金文良 . 沉管隧道块石垫层振密试验与颗粒流模拟研究[J]. 隧道建设, 2025 , 45(6) : 1090 -1101 . DOI: 10.3973/j.issn.2096-4498.2025.06.004

Abstract

Flatness, vibrodensification parameters, and the post-treatment quality of rock cushions are critical to the success of vibrodensification operations in immersed tunnels. The authors combine field testing and particle flow numerical simulations to investigate the vibrodensification performance of rock cushions, using the Shenzhen-Zhongshan Link immersed tunnel as a case study. The effects of vibro-densification duration, cushion thickness, and vibration frequency on the densification behavior are examined, and the underlying mechanisms are interpreted from a microscopic perspective based on strong contact force chains. The main findings are as follows: (1) Cushion thickness is the dominant factor influencing the vibration-induced settlement of the rock cushion, while vibration frequency influences settlement within an optimal frequency range. (2) For rock particle sizes of 0.15–0.30 m, a cushion thickness of 1.2 m and a vibration frequency of 20 Hz, a vibro-densification time of 45 s yields better performance than durations of 20 s or 30 s. (3) At a cushion thickness of 1.2 m and a vibrodensification time of 45 s, the optimal performance is achieved with a vibration frequency of 20 Hz, outperforming frequencies of 10 Hz and 30 Hz. (4) For improved vibro-densification, a cushion thickness greater than 1.2 m is recommended under a vibration frequency of 20 Hz and a vibro-densification time of 45 s.

Key words： rock cushion; immersed tunnel; vibrodensification test; particle flow simulation; static load test

Options

文章导航

〈

〉

模态框（Modal）标题

摘要

本文引用格式

Abstract