摘要
基于现场测试的成果,利用常数法、m法和编制的有限元程序对实际工况进行计算比较,研究分析了双排桩丁坝在涌潮作用下的受力机理。由于前排桩和后排桩的受荷模式不同、刚度不同,从而桩头弯矩不同。测试结果和理论分析表明,双排桩丁坝的桩体约束条件介于桩头自由和桩头固接之间,常数法和m法的计算都基于桩头完全固接的假设,其计算结果与实际情况相差较大,而有限元法计算假设较少,计算结果与实测值吻合较好。
Based on the observed data obtained from the field tests of a groin of double-row piles and the corresponding computed results by using the constant method, m method and FEM program, the stressing mechanism of piles in the groin under the action of tidal surge in Qiantang River is analyzed. The bending moments of pile heads at the front piles and the back ones are different due to the difference in loading mode and structural stiffness. The test results and theoretic analysis show that the restraining conditions for the piles of the double-row groin are between the free joint and the stiff joint of pile heads, the computed results by the constant method and the m method differ considerably from the test results because of the assumption of pile heads being fully stiff joint for the two methods, and the computed results by FEM are in good agreement with the test results due to less assumed conditions for FEM.
出处
《人民长江》
北大核心
2005年第2期37-39,共3页
Yangtze River
关键词
双排桩式丁坝
常数法
M法
有限元法
内力
现场测试
groin of double-row piles
constant method
m method
finite element method (FEM)
internal force
field test
