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1 概述沙颍河郑埠口枢纽工程是我省水运重点工程,包括船闸、节制闸、公路桥和翻水泵站。工程由水利部淮委规划设计院设计,一期土建由河南省水利第一工程局承建。节制闸为11孔,单孔净宽12m,闸墩长26m,宽1.2m,节制闸闸墩混凝土建筑时间为1995年7月至1996年11月,施工期拆模后不久即发现闸墩上出现竖向裂缝。该裂缝为沿闸墩长边自下而上垂直开展,是直线型裂缝,裂缝平均间距为4～6m,且在闸墩两侧面基本呈对称分布,部分闸墩存在一定程度不规则的微细网状裂缝。为确切了解裂缝开展情况,分析裂缝开展原因,为下步处理
1 Overview Zhengbukou Junction of Shaying River is the key project of our province’s water transportation, including ship lock, control gate, road bridge and over water pumping station. The project was designed by the Planning and Design Institute of the Huai Committee of the Ministry of Water Resources. The first phase of civil works was undertaken by the First Engineering Bureau of Henan Province. The control gate is 11 holes, the single-hole net width is 12m, the gate length is 26m and the width is 1.2m. The construction time of the control gate piers concrete is from July 1995 to November 1996. Shortly after disassembly during the construction period, To the cracks. The fractures are vertically developed from bottom to top along the long side of sluice piers, and are straight-line fractures. The average spacing of fractures is 4 ~ 6m, and are basically symmetrical on both sides of sluice piers. Some of the piers have some irregular fine meshes Cracks. In order to know the situation of crack development exactly, analyze the reason of crack development and deal with the next step