截流钢筋笼的稳定性及其计算方法  

Computational Method for the Stability of Steel Reinforcement Cage Applied in River Closure

作　　者：李学海[1] 程子兵[1] 汪世鹏[2] 石教豪[1] 

机构地区：[1]长江科学院水力学研究所,武汉430010 [2]长江科学院武汉长科工程建设监理有限责任公司,武汉430010

出　　处：《长江科学院院报》2013年第8期31-36,共6页Journal of Changjiang River Scientific Research Institute

基　　金：国家"十一五"科技支撑项目(2008BAB29B02)

摘　　要：对实践中常用到的正六面体钢筋笼的稳定性从质量、形状以及有无垫底材料等方面进行了试验研究及工程实例验证。首次拟合提出了考虑其形状因素、河床糙度因素的正六面体钢筋笼止动流速和起动流速的计算公式,经试验验证具有较高的计算精度和实用性。此外,对四面体钢筋笼的稳定性也进行了试验研究,研究表明:四面体钢筋笼用于截流抛投这类止动问题的工程时,其止动稳定性明显优于相同质量的正六面体钢筋笼;而对于护底等起动问题的工程,两者起动稳定性差别不大。The steel reinforcement cages with hexahedral shape are widely applied to river closure. Through tests and engineering example verifications focusing on weight, shape and bottom protection, the related formulas are fit- ted for the first time to compute the flow velocities for movement stopping and movement initiation of hexahedral steel reinforcement cages in consideration of cage shape and bed roughness. The fitted formulas are of high accuracy and practicality. In addition, tests on the stability of steel reinforcement cage with tetrahedral shape revealed that its movement stopping stability is prior to that of hexahedral cages of the same weight in the case of end-dump clo- sure; whereas for bottom protection, the difference in movement initiation stability is little.

关 键 词：截流 六面体钢筋笼 四面体钢筋笼 稳定特性 影响因素 计算公式 

分 类 号：TV551.2[水利工程—水利水电工程]