Construction method of replacement self-drainage water drainage system for high-underground-water-level sandy canal slope

The invention belongs to the technical field of underground water drainage system construction, and relates to a construction method of a replacement self-drainage water drainage system for a high-underground-water-level sandy canal slope. The construction method includes the first step of basic plane acceptance inspection and groove excavation, the second step of pipeline installation and the third step of clay replacement construction. The construction method has the beneficial effects that operation management is facilitated; water drainage smoothness and integrity of a water drainage structure are ensured; and maintenance expenses are reduced, and the service life is long. 本发明属于地下水排水系统施工技术领域，涉及种高地下水位砂质渠坡换填自排排水系统施工方法。包括，步骤1.基础面验收，沟槽开挖；步骤2.管道安装；步骤3.粘土换填施工。本发明的有益效果为：便于运行管理；保证了排水顺畅，以及排水结构的完好性；降低了维护费用，使用年限长。