滨江地区排水管道常用施工方案经济性分析研究

Analysis and Study on Economy of Common Construction Scheme for Drainage Pipelines in Riverside Area

摘要:

管道施工过程中，根据管道埋设深度的不同可采用不同的施工方案，主要包含放坡开挖、钢板桩支护、顶管施工等方案。以湖北黄冈某滨江大道工程为背景，主要从工程造价方面着手，不考虑周边环境限制，分析这几种方法所适用的管道开挖深度范围。结果表明：在一般土层地区，管道挖深不大于5 m时，放坡开挖更为经济，管道挖深5~7 m时，钢板桩支护开挖更为经济，管道挖深大于7 m时，顶管施工更为经济；在透水土层地区，管道挖深不大于3 m时，放坡开挖更为经济，管道挖深3~5.5 m时，钢板桩支护开挖更为经济，管道挖深大于5.5 m时，顶管施工更为经济；在软弱土层地区，管道挖深不大于2 m时，放坡开挖更为经济，管道挖深2~5.5 m时，钢板桩支护开挖更为经济，管道挖深大于5.5 m时，顶管施工更为经济；采用钢板桩支护开挖时，两管道中心间距不大于5.5 m时，同槽开挖更为经济，两管道中心间距大于5.5 m时，非同槽开挖更为经济。研究成果旨在为今后的管道施工方案选择提供一定的参考。

Abstract:

In the process of pipeline construction, the different construction schemes can be adopted according to the different laying depths of pipelines, mainly including the schemes of slope excavation, steel sheet pile support and pipe jacking. Taking a riverside avenue project in Huanggang of Hubei Province as the background, the range of pipeline excavation depth applicable to these methods is analyzed mainly from the perspective of engineering cost and not considering the restrictions of the surrounding environment. The results indicate that in the general soil areas, when the excavation depth of pipeline is not larger than 5 m, the slope excavation is more economical. When the excavation depth of pipeline is 5~7 m, the excavation with the steel sheet pile support is more economical. And when the excavation depth of pipeline is larger than 7 m, the pipe jacking construction is more economical. In the permeable soil areas, when the excavation depth of pipeline is not larger than 3 m, the slope excavation is more economical. When the excavation depth of pipeline is 3~5.5 m, the excavation with the steel sheet pile support is more economical. And when the excavation depth of pipeline is larger than 5.5 m, the pipe jacking construction is more economical. In the soft soil areas, when the excavation depth of pipeline is not larger than 2 m, the slope excavation is more economical. When the excavation depth of pipeline is 2~5.5 m, the excavation with the steel sheet pile support is more economical. And when the excavation depth of pipeline is larger than 5.5 m, the pipe jacking construction is more economical. When the steel sheet pile support is used for excavation, if the center spacing of two pipes is not larger than 5.5, the excavation in a same trench is more economical, and if the center spacing of two pipes is larger than 5.5 m, the excavation not in a same trench is more economical. The research results can provide some reference for the selection of pipeline construction scheme in the future.