Secondary stage prestress concrete water transport pipe and producing method

Abstract

The invention relates to a two-phase prestressing force concrete pipes and its manufacturing method. It includes pipe body made up of steel frame and concrete, the mentioned steel rib frame includes lengthwise rib, internal ring rib and external ring rib, there arranges with steel strand cables around the frame. The manufacturing method includes following steps: 1. the steel strand cables are tied on the steel frame along the round of the frame; 2. a cushion board and an embedded parts are arranged on the fixed position to be welded, and they are fixed with screw; 3. puts on stress to the pipe core through dragging the steel strand cable after the intensity of the pipe achieves the preset intensity; 4. cuts residual steel strand cable after the platform is regular, and seals the plastic cap, the external part is filled with concrete.

Description

technical field [0001] The invention relates to a prestressed concrete water delivery pipe and a manufacturing method thereof. Background technique [0002] Existing concrete water pipes are mainly self-stressed and prestressed concrete water pipes. Self-stress one-stage pipe making method, the stress of the pipe core is to apply a certain water pressure value by the rubber water jacket, and the stress value is generated relative to the stress tendon, and it is formed by steam curing. Since the self-stressed pipe is based on the converted stress value of the water pressure value, when the water pressure changes, it will directly affect the change of the stress value of the applied tube core, and longitudinal cracks often occur during the pipe load inspection process, making it impossible to repair and causing the pipe to be scrapped . [0003] Tube core wire winding process three-stage tube manufacturing method, the stress value of the tube core is based on the prestressed...

AI Technical Summary

Problems solved by technology

Since the self-stressed pipe is based on the converted stress value of the water pressure value, when the water pressure changes, it directly affects the change of the stress value of the applied tube core, and longitudinal cracks often occur during the pipe load inspection process, making it impossible to repair and causing the pipe to be scrapped

[0003] Tube core wire winding process three-stage tube manufacturing method, the stress value of the tube core is based on the prestressed steel wire heating method, a certain length of time is energized and heated at 350-380°C to wrap the tube core, and the tube core stress is applied by thermal expansion and contraction value, the practice process is due to the instability of the voltage and the change of the current value, the heating temperature is unstable, sometimes high and sometimes low, and the stress value applied to the tube core is unstable. Often during the load test process, the prestressed steel wire breaks and the tube body cracks, which is bound to There is a waste of prestressed steel bars in the second wire winding of the tube core

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