预应力土层锚杆加固前倾闸室墙优化设计  

Optimal design of forward leaning lock chamber strengthened by pre-stressed soil anchor

作　　者：沈旭鸿 王仙美 苏超[2] SHEN Xu-hong;WANG Xian-mei;SU Chao(China Design Group Co.,Ltd.,Nanjing 210014,China;College of Water Conservancy and Hydropower Electricity,Hohai University,Nanjing 210098,China)

机构地区：[1]华设设计集团股份有限公司,江苏南京210014 [2]河海大学水利水电学院,江苏南京210098

出　　处：《水运工程》2021年第11期148-152,共5页Port & Waterway Engineering

摘　　要：为解决重力式闸室墙前倾问题,以某船闸工程为例,对多个加固方案进行技术经济比较,并采用三维有限元法,对推荐方案的设计参数影响规律进行研究。结果表明:预应力土层锚杆加固方案造价经济,对周边环境影响小,其锚索张拉力对重力式闸室结构影响的敏感性较小,张拉高程在约23墙高处墙身应力较小,当锚索间距较大时,锚索间土体会出现一定的拉应力。合理设计预应力土层锚杆参数,可有效控制墙身及土体应力,取得良好的加固效果。该方法不仅可应用于船闸大修工程,也可为水闸、箱涵等其他类似水工结构的加固改造提供参考。To solve the problem of tilting of gravity lock chamber wall,we carry out the techno-economic comparison among several reinforcement schemes taking a lock project as an example,and adopt the finite element method to study the influence law of design parameters of the recommended schemes.The result shows that the pre-stressed soil anchor reinforcement scheme is economical in cost and has little influence on the surrounding environment,the tensile force of the anchor cable is less sensitive to the influence of the gravity lock chamber structure,and the wall stress is less at about 23 height of the wall.When the distance between the anchor cables is large,the soil mass between the anchor cables will appear certain tensile stress.Rational design of pre-stressed soil anchor parameters can effectively control wall and soil stress,and obtain good reinforcement effect.This method can be used not only in ship lock overhaul project but also in the reinforcement and reconstruction of sluice,box culvert and other similar hydraulic structures.

关 键 词：预应力土层锚杆 加固 闸室墙 优化设计 

分 类 号：U641.2[交通运输工程—船舶及航道工程]