大型水闸连续反拱底板加固技术研究

Strengthening of continuous counter-arched base plate of large water gate

太平闸建设时采用了较为特殊的连续反拱底板结构,该结构形式对水闸不均匀沉降适应能力较差,导致底板局部出现了裂缝。为对太平闸反拱底板进行抗裂加固,采用三维有限单元法对该闸地基系统进行应力变形分析,对工程安全状况作出评估,在此基础上进行抗裂加固方案的综合比选、优化,并对方案有效性和施工期闸墩、底板结构安全性进行复核评价,由此制定出切实可行的底板加固方案和安全措施,取得了良好的应用效果。

Abstract： The structure of continuous counter-arched base plate was employed during the construction of Taiping Gate which resulted in crack in some parts of base plate due to the weakness of its capacity to with- stand uneven settlement of the gate. In order to prevent crack and strengthen counter-arched base plate of Taiping Gate, stressed deformation is analyzed by means of three-dimensional finite element method. Assess- ment of safety condition of the gate is conducted and then comparison of options for preventing crack and strengthening is made. Re-assessment is carried out for the safety of gate pier and base plate structure during construction period. Practical measures for base plate strengthening and safety are worked out and achieved good result.