摘要
针对嶂山闸开展病险加固模拟设计研究,设计预应力结构加固措施,研究优化预应力锚索布设根数与锚索直径参数。加固结构中锚固洞拉应力最大,且最大拉应力与锚索根数、锚索直径均为负相关,闸台、锚块最大拉应力在锚索根数为16后出现降幅;锚索直径增大2 mm,闸台、锚固洞、锚块最大拉应力分别平均降低22.7%、7.6%、24.4%,且降幅递减。锚块体、锚固洞最大压应力随锚索根数递减,闸台稳定在8.5 MPa;闸台、锚固洞最大压应力与锚索直径具有幂函数关系,直径增大2 mm,两者最大压应力分别损失25%、23.5%。研究认为锚索根数16、锚索直径22 mm时加固设计方案最优。
Aiming at Zhangshan Gate,this paper carries out the research on the simulation design of reinforcement,takes the prestressing structure as the reinforcement measure and studies and optimizes the number and diameter parameters of prestressing anchor cable.In the reinforced structure,the tensile stress of the anchor hole is the largest,and its maximum tensile stress is negatively correlated with the number of anchor cables and the diameter of anchor cables.The maximum tensile stress of the brake platform and anchor block decreases only when the number of anchor cables is 16.When the dia-meter of anchor bar increases by 2 mm,the maximum tensile stress of brake platform,anchor hole and anchor block respec⁃tively decreases by 22.7%,7.6%and 24.4%on average,and the decrease rate decreases gradually.The maximum compre-ssive stress of anchor block and anchor hole decreases along with the number of anchor cable roots,and the brake platform is stable at 8.5 MPa.There is a power function relationship between the maximum compressive stress of the brake platform and the anchor hole and the diameter of the anchor cable.When the diameter increases by 2 mm,the maximum compressive stress of the brake platform and the anchor hole loses 25%and 23.5%respectively.This paper shows that the reinforcement design scheme is the best when the anchor cable number is 16 and the diameter of the anchor cable is 22 mm.
作者
齐春舫
王霄
谷静
陈超
缪成美
QI Chun-fang;WANG Xiao;GU Jing;CHEN Chao;MIAO Cheng-mei(Huai'an Water Conservancy Survey Design and Research Institute Co.,Ltd.,Huai'an 223005,China;Huai'an Huaihe Water Conservancy Construction Engineering Co.,Ltd.,Lianshui 223400,China)
出处
《海河水利》
2021年第4期95-99,共5页
Haihe Water Resources
关键词
苏北
水利排险
水闸
加固设计
应力
Northern Jiangsu
water conservancy of danger release
gate
reinforcement design
stress
