摘要
通过1∶4模型试验研究,分析凿毛、企口、锚筋和预应力等接头处理方式的梁—柱接头的抗剪性能,提出采用"企口+锚筋+预应力"的接头型式作为大轴力桩基托换的梁—柱接头连接方式。并用1/2模型试验验证该种接头的安全性和可靠性。通过1/4整体模型试验,研究了大轴力桩基主动托换过程中托换荷载在托换结构中的分配关系及截桩过程中荷载的转换规律。
Witha 1∶4 model test and study, the paper analyzes the antishear performance of the beamcolumn joint such as the chiseling, tongue and groove, anchor bar and prestressed force. The paper proposes that the joint type of 'tongue and grove + anchor bar + prestressed force' be used as that of the highload pile foundation underpinning. The safety and reliability of this type of joint is verified by a 1∶2 model test and passes the 1∶4 integrated model test. The paper studies the sharing relationship of underpinning load in underpinning structure in highload active underpinning process and the transition rule of loading in chopping pile process.
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
2003年第5期15-22,共8页
China Railway Science
基金
深圳市科研项目(99DTHF 01)
