A kind of prefabricated concrete water pipe and its preparation method

Abstract

The invention belongs to the technical field of concrete, in particular to a prefabricated concrete water pipe and a preparation method thereof, which are used to solve the problem of temperature cracks in large-volume concrete. The water pipe includes horizontal pipe parts and vertical pipe parts connected by a tee, and the vertical pipe parts are arranged on the horizontal pipe parts at equal intervals, both of which include hollow plastic bellows or steel pipes and threaded reinforced concrete coated on the outside The steel bars and steel mesh at the interface between the two pipes are connected by spot welding, and are connected as an integral structure through cast-in-place precast concrete. The two realize the temperature control of the horizontal gradient direction and the vertical gradient direction of mass concrete respectively. The "T" structure formed by the two can effectively replace the traditional complex structure of layered horizontal water pipes; the vertical pipe parts can be used as water pipes Filling channels can improve the filling efficiency and effect of water pipes, and reduce internal defects and cracks.

Description

technical field [0001] The invention belongs to the technical field of concrete, in particular to a prefabricated concrete water pipe and a preparation method thereof. Background technique [0002] In recent years, in order to meet the requirements of the project construction period, the construction technology of chute is generally used in the construction of large-volume concrete pouring. The construction speed of this technology is about three times that of the ordinary pump truck pumping construction technology. The disadvantage of the sharp rise is that it is easy to produce concrete cracks and cause cracks in the concrete structure. [0003] In current engineering applications, the method of passing cooling water through steel pipes is mainly used to reduce the internal temperature of concrete. However, practice shows that due to the different materials of steel and concrete, there are differences in thermal expansion coefficient and elastic modulus, and the heat trans...

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Problems solved by technology

[0002] In recent years, in order to meet the requirements of the project construction period, the construction technology of chute is generally used in the construction of large-volume concrete pouring. The construction speed of this technology is about three times that of the ordinary pump truck pumping construction technology. The disadvantage of sharp rise is that it is easy to produce concrete cracks and cause cracks in the concrete structure

[0003] In current engineering applications, the method of passing cooling water through steel pipes is mainly used to reduce the internal temperature of concrete. However, practice shows that due to the different materials of steel and concrete, there are differences in thermal expansion coefficient and elastic modulus, and the heat transfer performance is average, which is prone to cold bridges. effect, forming cracks; at the same time, the circular steel pipe is difficult to hold tightly with the concrete, which is easy to cause defects and form cracks; and in order to ensure that the steel pipe does not deform during the pouring process, the thickness should meet certain requirements, but the increase in thickness will cause material costs and engineering costs. Negative Effects

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