咸宁市牛鼻潭拦河水闸除险加固防渗设计

The Seepage Control Design of Niubitan River Sluice Reinforcement in Xianning City

牛鼻潭拦河水闸运行多年,工程存在严重损坏,下游和两岸发生严重的渗流现象。为了继续发挥水闸的经济效益,需对水闸进行除险加固及防渗处理。本次防渗设计在原建工程的基础上,结合工程最新勘察地质资料,对闸室段基础采取灌浆帷幕防渗;拦河水闸两岸分别开挖素填土层和砂卵石层,回填黏土,形成截渗堤,并在左岸进行闸肩充填灌浆处理。采用改进阻力系数法对水闸防渗效果的分析表明,防渗措施降低了闸室的渗流和闸肩的绕流,保证了防渗系统的完整性和可靠性。

Niubitan River sluice has operated for many years ,which is seriously damaged now .There exists serious seepage in down-stream and two banks .In order to make the sluice bring economic benefit as before ,reinforcement and anti-seepage treatments are going to be carried out .Combining the latest survey geological data ,the seepage control design aims at reinforcing the sluice on the basis of the original engineering ,a row of grouting curtain will be made on the basis of the sluice chamber section .The cutoff dikes will be formed after excavating the filling soil and sandy pebble layers on the two banks and backfilling with clay ,the filling grouting treatment will be made at sluice abutment on the left bank .Improved resistance coefficient method is adopted to analyze the effect of anti-seepage treatments ,and the results show anti-seepage measures decrease the seepage on the sluice chamber section and flow a-round at the sluice abutment eventually ensuring the integrity and reliability of anti-seepage system .