Prestress lining structure of high-internal-pressure water conveying tunnel

Abstract

The invention relates to a prestress lining structure of a high-internal-pressure water conveying tunnel, and belongs to the field of civil engineering. The prestress lining structure comprises a reinforced concrete lining, carbon fiber cloth attached to a prestress anchor cable lining anchorage slot pre-buried in the lining, and carbon fiber pins having a fixing effect. The two ends of the carbon fiber cloth go deep into holes of the reinforced concrete lining through the carbon fiber pins. The holes are filled with structural glue adhesives. The carbon fiber pins are attached to the reinforced concrete lining through the structural glue adhesives. The heads, exposed out of the reinforced concrete lining, of the carbon fiber pins are each in a petal shape and attached and fixed to the carbon fiber cloth. Another layer of carbon fiber cloth is attached to the fixed areas. The technical problems that cracks appear in and even anchor cable failures happen to concrete of anchorage slots of the prestress lining structure of the high-internal-pressure water conveying tunnel due to excessively-large tensile stress are effectively solved, and wide application prospects are achieved.

Description

technical field [0001] The invention relates to a prestressed lining structure of a high internal pressure water delivery tunnel, belonging to the field of civil engineering. Background technique [0002] In hydraulic structures, high internal pressure water delivery tunnels are very common. If the high internal pressure water tunnel is lined with ordinary reinforced concrete, due to the excessive internal water pressure, the tensile stress in the tunnel lining pipe wall concrete will easily exceed the ultimate tensile strength of the concrete, and cracks will occur in the concrete, resulting in internal water leakage and occurrence of Surrounding rock stability problems can easily cause large economic losses. Therefore, high internal pressure water tunnels are generally lined with prestressed concrete. [0003] The prestressed lining of high internal pressure water delivery tunnels mostly adopts the form of circular section. The lining and the surrounding rock work toget...

AI Technical Summary

Problems solved by technology

However, there are the following problems in the sticky-rigid reinforcement method: (1) The reinforcement of reinforced concrete structural members with pasted steel plates should not exceed 3 layers, and the total thickness of the steel plates should not be greater than 10 mm, and the processing and transportation costs of special-shaped steel plates are high; (2) Sticky-rigid reinforcement The method is suitable for use in environments where the ambient temperature does not exceed 60°C, the relative humidity does not exceed 70%, and there is no chemical corrosion. It is easy to corrode and rust in high-pressure water delivery tunnels, and the later maintenance costs are high.

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