解决既有挡墙排水失效的关键技术研究  

Key Technical Research on Solving the Drainage Failure of Existing Retaining Walls

作　　者：林祖锴 黄俊辉 LIN Zukai;HUANG Junhui(Guangzhou Design Institute Group Co.,Ltd.Guangzhou 510620,China)

机构地区：[1]广州市设计院集团有限公司,广州510620

出　　处：《广东土木与建筑》2025年第3期11-13,18,共4页Guangdong Architecture Civil Engineering

基　　金：住房和城乡建设部科学技术计划项目“高陡边坡落石监测预警及防控治理体系关键技术研究”(2022-K-039)。

摘　　要：对于既有挡墙排水失效的问题,目前岩土工程界缺少有效且可供推广的解决方法。文中提出了一种新型排水系统,其关键技术包括:①新型排水系统由墙顶疏干井和墙脚深层泄水孔组成,疏干井形成降水漏斗,通过深层泄水孔将墙后土体地下水排出,从而解决既有挡墙排水系统失效的问题;②介绍了墙后土体排水量、疏干井出水能力、降水影响半径及疏干井间距等设计计算方法;③说明新型排水系统施工中应注意的关键工艺要求;④通过实例论证了新型排水系统在解决既有挡墙排水失效问题上的有效性。总之,新型排水系统设计新颖简便、施工操作方便,已在实际工程中得到应用,适用于重力式毛石挡土墙、钢筋混凝土挡墙及装配式挡土墙等,具有较强的参考价值。The existing drainage failure issues of retaining walls currently lack effective and widely applicable solutions in the geotechnical engineering field.Proposes a novel drainage system,which includes key technologies such as:①The novel drainage system consists of a drainage well at the top of the wall and deep drainage holes at the base,forming a dewatering funnel that discharges groundwater from the soil behind the wall through the deep drainage holes,thereby addressing the failure of the existing drainage system;②Design calculation methods for the drainage capacity of the soil behind the wall,the discharge capacity of the drainage well,the radius of influence of the dewatering process,and the spacing between drainage wells are introduced;③Key construction process requirements to be noted during the implementation of the new drainage system are explained;④Case studies demonstrate the effectiveness of the novel drainage system in resolving the drainage failure issues of existing retaining walls.In summary,the design of the novel drainage system is innovative and straightforward,with convenient construction and operation.It has been applied in practical engineering projects and is suitable for gravity stone retaining walls,reinforced concrete retaining walls,and prefabricated retaining walls,offering significant reference value.

关 键 词：既有挡墙 新型排水系统 疏干井 深层泄水孔 

分 类 号：TU476.4[建筑科学—结构工程]