针对短距离、小范围淤积或沼泽地的管道穿越施工难的问题 ,介绍一种有效的施工方法———拖管法。采用该方法不需要常规施工机具在泥沙淤积现场行走 ,而且对防止管沟壁塌落效果明显 ,其施工成本仅为定向钻孔穿越施工方法的一半 ,但与之相比该方法的施工速度较慢、劳动强度较高 For the short distance, small siltation or wetlands of the pipeline through the difficult construction problems, introduced an effective method of construction --- drag tube method. This method does not require conventional construction machinery to walk in the site of sediment deposition, but also has obvious effect on preventing tunnel wall collapse. The construction cost is only half of the construction method of directional drilling, but compared with the construction speed Slower, higher labor intensity