关键词: 分层总和法, 伸缩缝开展, 止水带, 修复方案设计, 横塘河北枢纽, 常州市

Abstract: Facing the phenomenon of expansion of transverse joint that connects the sluice and the pumping station at Hengtang River water complex, Changzhou, we apply the layerwise summation method to figure out the final settlement of the structures, then the subsidence observation data during 2005~2016 are analyzed. Through the comparison we obtain some conclusions: though the accumulative settlement of the pumping station and the sluice met the engineering specifications, the uneven settlement still resulted in the failure of rubber water-sealing belt in the joints, which further induced the seepage in the pumping house; since 2012, the foundation settlement and structure deformation has tended to stable, so it's the right time to repair the defects of expansion joints. Through field analysis on the expansion joint damage, we decide to add vertical copper foil water-sealing belt on the top of joint, which are overlapped with the horizontal water-sealing belt on the bottom plate, and carry out high pressure grouting to reinforce, at the same time plug the leaking pipe near the side pier of the pumping station.

Key words: layerwise summation method, expansion of joint, water-seal belt, design of repairing, Hengtang River sluice