引江济淮工程混凝土预制块护坡施工技术

Construction Technology of Precast Concrete Block Slope Protection in the Project of Diversion from the Yangtze River to Huaihe River

引江济淮工程涉及供水河道线路长,部分河道现状边坡地质为砂壤土层,具中等透水性,抗冲刷能力较差。该工程具有施工周期短、运行管理周期长、河道防护要求高的特点,既要符合输水设计要求,也要满足生态治理的理念。通过现场应用证明,河道护坡采用混凝土预制块施工能够兼顾上述要求,同时预制块的25%透水率特性参数,能够很好地平衡护坡与临边土壤的水压力,避免两侧水压力不平衡而损坏,并且该预制块强度高,起到良好的防冲刷效果。

The project of diversion from the Yangtze River to the Huaihe River involves a long water supply channel, and the current slope geology of some of the river channels is a sandy loam layer with moderate water permeability and poor erosion resistance. The project has the characteristics of short construction period, long operation and management period, and high river protection requirements. It must not only meet the requirements of water delivery design, but also meet the concept of ecological governance.Field applications have proved that the use of concrete precast blocks for river slope protection can take into account the above requirements. At the same time, the 25% water permeability characteristic parameters of the precast blocks can well balance the water pressure of the slope protection and the adjacent soil, and avoid the damage caused by imbalance of the water pressure on both sides.The prefabricated block has high strength and has a good anti-scouring effect.