河道整治工程根石加固时机及措施研究

Research on Time and Mearures of Root Stone Reinforcement in River Training Works

介绍了河道整治工程根石稳定的影响因素和根石加固存在的问题,结合工程靠溜、根基强度、工程出险等情况,对根石预加固、抢险加固的时机以及产生的效果进行了分析,针对目前根石加固中存在的问题提出了措施和建议:①根石加固时机一般分为汛前、汛期、汛后,以汛前加固为主,汛期加固为辅,汛后加固多在洪水过后特殊情况下进行,抢险时机均需结合水流条件和工程根基的强度而定;②建议根石加固时配置长臂挖掘机或配套长臂;③在机械岸抛不能到位的情况下,可辅以船抛配合岸抛加固根石;④无论是岸抛还是船抛,均应拣选石料,按大小、先后顺序抛投;⑤适时采用铅丝石笼加固工程。

The influence factors of root stone stability of river training works and problems of root stone reinforcement were introduced. Combined with engineering on slip, the strength of foundation, engineering danger, etc. , the time and effects of the root stone pre-reinforcement, rescue and reinforcement were analyzed, the problems that exist in the root stone on the reinforcement measures and suggestions were put forward. The results show that ： （1）The root stone reinforcement time is generally divided into before flood season, flood season and ＇after the flood season, reinforcement before flood season is cardinal, reinforcement in flood season is complementary, reinforcement after flood season appears more under special circum- stances, all reinforcements must be combined with the flow conditions and the strength of the engineering foundation ; （2）The long arm excavator or the long arm of a complete set is recommended ; （3）If the case of mechanical shore throwing can＇ t be in right place, it can be supplemented by boat throwing coordinated with shore throwing; （4）Whether shore throwing or boat throwing, it should choose stones in chronological and size order; （5） It is necessary to adopt lead wire gabion to reinforce the engineering timely.