沙坡头水利枢纽复杂地质条件下的帷幕缺陷处理经验分析

Analysis on curtain defect processing experience under complex geological conditions of Shapotou Key Water Control Project

坝基处理是修建大坝的关键,处理不当会留下工程缺陷,甚至隐患。针对沙坡头水利枢纽泄洪闸及南干电站坝段帷幕缺陷问题进行了四次帷幕补强处理,并对其经验、成果进行分析,探讨在泥岩、砂岩、软岩等复杂地质条件下,如何合理制定帷幕灌浆施工方案,达到帷幕缺陷处理的预期效果,解决大坝帷幕灌浆隐患。研究结论可为其他工程提供借鉴。

Dam foundation treatment is the key to build a dam,and engineering defects and even hidden danger will be left due to improper treatment. Curtain reinforcement treatment is carried out for four times mainly aiming at curtain defect problems in Shapotou key water control project sluice and Nangan power station dam section. Experience and results are analyzed for discussing how to rationally formulate curtain grouting construction plan under mudstone,sandstone,soft rock and other complicated geological conditions,thereby reaching curtain defect treatment anticipated effect,solving dam curtain grouting hidden danger. The research conclusions can provide reference for other projects.