岩土工程学报2024，Vol.46Issue(z1)：143-146,4.DOI:10.11779/CJGE2024S10014
DCM和碎石基床联合承载特性的离心模型试验研究
Centrifugal model tests on combined bearing characteristics of DCM and gravel foundation
王雪奎 1岳长喜 1黄思杰2
作者信息
- 1. 中交天津港湾工程研究院有限公司,天津 300461||港口岩土工程技术交通运输行业重点实验室,天津 300461||天津市港口岩土工程技术重点实验室,天津 300461||中交集团岩土工程重点实验室,天津 300222||中交第一航务工程局有限公司,天津 300461
- 2. 华设检测科技有限公司,江苏 南京 210000
- 折叠
摘要
Abstract
The combination of DCM and gravel foundation is a new type of foundation form for dealing with complex geological conditions of cross sea immersed tube tunnels,which has extremely advantageous in soft soil areas.Based on the immersed tunnel project of Shenzhong-Zhongshan Bridge,centrifugal model tests are conducted to study the bearing characteristics of the DCM combined gravel foundation and the influences of excitation loads on the integrity of the DCM piles.The research results show that there is a turning point in the load-settlement curve of the composite foundation and a linear relationship between the load and the settlement before the turning point,and a steep drop after the turning point.The gravel foundation can effectively disperse stress and improve the overall bearing capacity of the foundation.The ultimate bearing capacity of the composite foundation is about 1.5 times the maximum load at the bottom of the immersed tube.When the upper load exceeds the ultimate bearing capacity of the foundation,the gravel will penetrate into the DCM piles,causing the pile head to break,with an impact range of about 3 m below the pile head.The surface settlement of the foundation is relatively small,and the post-construction settlement accounts for 15.5%of the total settlement.This new type of foundation form can effectively control settlement.关键词
DCM/复合地基/碎石基床/承载特性Key words
DCM/composite foundation/gravel foundationt/bearing characteristic分类
建筑与水利引用本文复制引用
王雪奎,岳长喜,黄思杰..DCM和碎石基床联合承载特性的离心模型试验研究[J].岩土工程学报,2024,46(z1):143-146,4.
