贾鲁河后曹拦河闸闸室段主要工程地质问题处理措施  

The Strategies for Addressing the Primary Engineering Geological Challenges in the Houcao Sluice Chamber Section

作　　者：李洁 张永央 LI Jie;ZHANG Yongyang(Yan Mountains Reservoir Operation Center,Henan Province,Zhengzhou 450008,China;Henan Provincial Water Resources Survey CO.LTD.,Zhengzhou 450008,China)

机构地区：[1]河南省燕山水库运行中心,河南郑州450008 [2]河南省水利勘测有限公司,河南南郑州450008

出　　处：《河南水利与南水北调》2024年第5期95-96,共2页Henan Water Resources & South-to-North Water Diversion

摘　　要：后曹拦河闸主要建筑物等级为1级,洪水标准为100年一遇设计,200年一遇校核,对应流量均为控泄634 m^(3)/s。闸底板底高程63.80 m,闸基主要位于砂壤土中,砂壤土具中等透水性,闸室段主要存在闸基(绕闸)渗漏和渗透稳定问题、闸基稳定问题。需要对闸基进行防渗和补强处理。针对闸室段存在的主要工程地质问题,设计和施工中采用高喷搅拌防渗墙、CFG桩对闸室段基础进行了处理,处理后经检测,防渗墙、复合地基各项指标均满足设计要求,后曹拦河闸闸室段基础处理方案是合理可行的。The main building grade of Houcao Sluice is classified as level 1.The flood standard is designed once in 100 years and checked against a return period of 200 years,corresponding to a flow rate of 634 m^(3)/s.The elevation of the bottom plate of the gate is 63.80m.The foundation of the gate is mainly located in sandy loam with medium permeability.The primary challenges in the gate chamber section are related to gate base(winding)leakage,seepage stability,and overall base stability.In view of the main engineering geological problems existing in the sluice chamber section,high spray mixing anti-seepage wall and CFG pile are used to treat the lock chamber section foundation in the design and construction.After undergoing treatment,the test results indicate that the cut-off wall and composite foundation meet the design requirements,thereby confirming the reasonability and feasibility of the foundation treatment scheme for Houcao Sluice Chamber Section.

关 键 词：闸基渗漏 渗透稳定 高喷搅拌防渗墙 

分 类 号：TV66[水利工程—水利水电工程]