Water passing pipe for precast concrete and preparation method thereof

Abstract

The invention belongs to the technical field of concrete, and particularly relates to a water passing pipe for precast concrete and a preparation method thereof. The water passing pipe is used for solving the problem of temperature cracking of large-volume concrete. The water passing pipe comprises a horizontal pipeline part and vertical pipeline parts which are connected by tee joints, wherein the vertical pipeline parts are arranged on the horizontal pipeline part at equal intervals; the horizontal pipeline part and the vertical pipeline parts comprise hollow plastic corrugated pipes or steel pipes and threaded reinforced concrete pipes coating the exterior; reinforcing steel bars and reinforcing meshes at connectors of the horizontal pipeline part and the vertical pipeline parts are connected by adopting spot welding; and the horizontal pipeline part and the vertical pipeline parts are connected into an integrated structure through cast-in-place precast concrete. The horizontal pipeline part and the vertical pipeline parts respectively achieve the temperature control in the horizontal gradient direction and vertical gradient direction of mass concrete; the "T"-shaped structure formed by the horizontal pipeline part and the vertical pipeline parts can effectively replace the complex structure of laying horizontal water passing pipes in the traditional layering; and the vertical pipeline parts can be used as water passing pipe filling channels, so that the filling efficiency and effect of the water passing pipe can be improved, and internal defects and cracks are reduced.

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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