A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
According to bridge prestressed pipeline grouting, the grouting compactness has important influence on the durability of a bridge, and according to statistics, the actual service life of the bridge can be shortened to one tenth of the designed service life due to corrosion of a steel strand in a prestressed pipeline and loss of prestress in advance caused by non-compactness of the grouting. Research finds that the prestressed construction quality problem occurs when many bridges collapse accidents, one of the main reasons is that duct grouting is not dense, and the main reason for the non-dense grouting is that air in a prestressed pipeline is not completely discharged. At present, air in a pipeline can be exhausted only through a circulation loop system in intelligent grouting equipment, but the method is not widely used up to now due to the fact that operation is complex, the requirement for reliability of the intelligent grouting equipment is high, and the construction cost is high. Therefore, the invention provides a construction method which is simple and convenient to operate and high in reliability.
桥梁预应力管道压浆，其压浆密实性好坏对桥梁的耐久性具有重要影响，据统计，由于压浆不密实导致预应力管道内钢绞线锈蚀，预应力提前丧失，可造成桥梁实际寿命缩短至设计寿命的十分之一。研究发现，众多桥梁出现垮塌事故都出现了预应力施工质量问题，主要原因之一是孔道压浆不密实，而导致压浆不密实的主要原因就是预应力管道内的空气未完全排出。目前为止所能采取的方法仅有通过智能压浆设备中的循环回路系统达到排出管道内空气，但此方法由于操作复杂，对智能压浆设备可靠性要求较高，且施工成本较高，至今未能广泛使用。为此本发明提供了一种操作简便，可靠性高的施工方法。
According to bridge prestressed pipeline grouting, the grouting compactness has important influence on the durability of a bridge, and according to statistics, the actual service life of the bridge can be shortened to one tenth of the designed service life due to corrosion of a steel strand in a prestressed pipeline and loss of prestress in advance caused by non-compactness of the grouting. Research finds that the prestressed construction quality problem occurs when many bridges collapse accidents, one of the main reasons is that duct grouting is not dense, and the main reason for the non-dense grouting is that air in a prestressed pipeline is not completely discharged. At present, air in a pipeline can be exhausted only through a circulation loop system in intelligent grouting equipment, but the method is not widely used up to now due to the fact that operation is complex, the requirement for reliability of the intelligent grouting equipment is high, and the construction cost is high. Therefore, the invention provides a construction method which is simple and convenient to operate and high in reliability.
桥梁预应力管道压浆，其压浆密实性好坏对桥梁的耐久性具有重要影响，据统计，由于压浆不密实导致预应力管道内钢绞线锈蚀，预应力提前丧失，可造成桥梁实际寿命缩短至设计寿命的十分之一。研究发现，众多桥梁出现垮塌事故都出现了预应力施工质量问题，主要原因之一是孔道压浆不密实，而导致压浆不密实的主要原因就是预应力管道内的空气未完全排出。目前为止所能采取的方法仅有通过智能压浆设备中的循环回路系统达到排出管道内空气，但此方法由于操作复杂，对智能压浆设备可靠性要求较高，且施工成本较高，至今未能广泛使用。为此本发明提供了一种操作简便，可靠性高的施工方法。
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