大口径排水顶管在山地城市的应用

Application of Large-diameter Drainage Pipe Jacking in Mountainous City

摘要:

在市政排水工程中，顶管工法相较于传统开槽工法具有对环境影响小、地下管网迁改量少、征地拆迁少等优点。以山地城市大口径（DN≥2 000）排水顶管工程为例，介绍了顶管受力估算和管道允许顶力计算，分析了沉降原因，介绍了沉降数值估算方法，分析了影响顶力的主要因素，并提出相关控制措施，为重庆等类似山地城市顶管工程设计及施工提供了一定参考。

Abstract:

In the municipal drainage engineering, the pipe-jacking method has the advantages of less environmental impact, less relocation of underground pipe network and less land acquisition and demolition compared with the traditional slotting method. Taking the large diameter (DN≥2 000) drainage pipe-jacking project in mountainous city as an example, the estimation of pipe jacking stress and the calculation of allowable pipe jacking force are introduced. The cause of settlement is analyzed. The method of settlement numerical estimation is introduced. The main factors affecting the jacking force are analyzed. And the relevant control measures are proposed. All provide some reference for the design and construction of pipe jacking engineering in Chongqing and other similar mountainous cities.