顶管施工防渗漏技术研究——以锦江再生水顶管工程为例

Research on Anti-seepage Technology of Pipe:Taking Jinjiang Reclaimed Water Pipe Project as an Example

为了提高管道防渗能力,从管网的使用场景及自身构造分析了顶管防渗的关键技术难题。引入张开角与张开值参数描述管节接头张开情况,说明了提高管节线形精度对于顶管防渗的作用。介绍了激光测量的线形控制系统工作原理,应用全天候线形监测控制系统提高顶管线形精度,取得了良好的效果,并从顶管精度的角度分析了该系统在顶管防渗中所起的作用。分析了管节接头承载能力与张开长度之间的关系。针对锦江再生水顶进施工法用钢筒混凝土管管节接头,提出了基于举升装置与密封性测试的管节对接优化方法,并在该项目进行了成功地应用,以上研究说明全天候监控系统与基于举升装置的密封测试方法对顶管防渗是有效的。

To improve the impermeability of the pipeline,the key problem of impermeability during pipe-jacking was studied in respect of its use scenario and own structure.Then,opening angle and opening value was introduced to describe the opening state and explain the effect of improving the linear accuracy of the pipe line for anti-seepage of pipe jacking.The all-weather linear control system based on laser measurement system was introduced and applied successfully.Its effect in improving linear accuracy and inducing leakage passage was demonstrated.The relationship between opening length and bearing capacity was established.For JCCP pipe of Jinjiang reclaims water pipe project,the water pipe joint is optimized aimed based on lifting device and airproof testing.The successful implementation of the project confirms the feasibility of the above anti-seepage technology of mechanical pipe jacking.The above study demonstrate that all-weather linear control system and airproof testing based on lifting device is effective for anti-seepage.