沟道型弃渣场截排水设计方法

Design Method for Interception and Drainage for Gully-type Spoil Area

本文以新建叙永至毕节铁路、成昆铁路复线弃渣场设计施工为工程依托,采用理论分析与工程实践相结合的方法,对沟道型弃渣场的排水设计方法进行了研究分析。根据弃渣场过水能力和汇水流量大小,提出了3种弃渣场排水设计方法,分别为渣顶水沟+截水天沟、双截水沟和引水洞+两侧天沟排水。排水设计方法的核心理念是通过渣顶水沟、排水沟或引水洞引排主沟大流量汇水,再通过截水天沟引排坡面汇水,以有效保证弃渣场排水系统的有效性,降低流水对弃渣场的水稳破坏,保证弃渣场的安全稳定。

Based on the design and construction of the spoil areas of new Xuyong-Bijie Railway and the second track of Chengdu-Kunming Railway,this paper analyzed the drainage design method for gully-type spoil areas by combining theoretical analysis with engineering practice.According to the discharge capacity and catchment flow of the spoil areas,three drainage design methods for the spoil areas were proposed,namely,top ditch+intercepting gutter,double intercepting ditch,and diversion tunnel+gutter on both sides.The core concept of the drainage design method is to drain the large-flow catchment water from the main ditch through the top ditch,drainage ditch,or diversion tunnel,and then drain the slope catchment water through the intercepting gutter,so as to effectively ensure the effectiveness of the drainage system of the spoil area,reduce the damage of flowing water to the water stability of the spoil area and ensure the safety and stability of the spoil area.