JPS6156403B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for constructing cooling water piping (hereinafter referred to as circulating water piping) for steam condensation to be buried under a mat of a turbine building in the construction of a power plant having a condenser.

In order to clearly illustrate the present invention, conventional embodiments will be described. FIG. 1 is a sectional view showing the arrangement of circulating water piping buried under a turbine building mat. FIG. 2 is a sectional view showing circulating water piping construction and turbine building mat construction.

When the excavation of the turbine building area is completed, anchor materials 1 for fixing circulating water piping are set and concrete 2 is poured. After the concrete 2 has cured, a frame 5 for the circulating water pipes 3 and 4 connected to the water chamber 13 attached to the condenser 12 is installed, and the circulating water pipes 3 and 4 are brought in, centered, and temporarily welded. Circulating water piping 3, 4
When the arrangement is completed, main welding and welding inspection are performed, and the inner and outer surfaces of the circulating water pipes 3 and 4 are painted. After the coating inspection is completed, concrete 11 is poured to the level below the turbine building pine. After the concrete 11 is cured, the reinforcing material 10 is assembled and the turbine building mat concrete 9 is poured.

Note that 14 is a turbine pedestal, 15 is a turbine, and 20 is a turbine operating bed.

The conventional construction method for circulating water piping buried under the pine of a turbine building was as described above, but such construction method had the following serious drawbacks.

That is, in such a conventional construction method, the construction of the circulating water pipes 3 and 4 is completed, and the concrete 1
The turbine building mat 9 cannot be constructed until after the concrete 11 has been poured and the concrete 11 has cured. Moreover, the turbine building mating work in this area is delayed compared to the mating work in other areas, which poses problems from a construction and safety perspective.

As a result, the construction of the 14th section of the turbine pedestal becomes a critical path for the construction of the entire turbine building, and is the biggest reason for the long construction period of the entire power plant.

The present invention has been made in view of the above-mentioned circumstances.(a) The construction of the circulating water piping buried under the turbine building mat is carried out in parallel with the turbine building mat construction, and the structure work of the entire turbine building can be completed. (b) To significantly shorten the construction period for the entire turbine building frame, and (c) To improve the workability and safety of the turbine building frame work.

That is, the object is to obtain a construction method for circulating water piping buried under the pine of a turbine building that can achieve the above objects.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 3, after completion of excavation, anchor materials 1 are set and concrete 2 is poured. After the concrete 2 has cured, the support beam steel 7 receives the wire mesh (ribrass) 6 and the turbine building pine reinforcing material 10
The supporting steel material 8 is installed from the anchor material 1. At this point, the circulating water piping 4 to be buried is brought in and temporarily placed. Next, a steel support beam 7 for receiving the wire mesh (ribrass) and the turbine building mat reinforcement material 10 is installed, and using this support beam steel material 7, it is connected to the water chamber 13 attached to the condenser 12, and is connected to the turbine building mat 9. The vertical part 3 of the circulating water pipe to be directly buried is set up, and at the same time, the wire mesh (ribrass) 6 is installed. This wire mesh (ribrass) 6 can separate the turbine building mat section 9 from the construction area 11 of the circulating water pipes 3 and 4.
Each construction project can be carried out in parallel. In other words,
Construction of the turbine building mat 9 can be started while continuing construction of the circulating water pipes 3 and 4. The construction of the circulating water piping will continue with alignment of the horizontal section 4, welding, welding inspection, and painting and painting inspection.

In the turbine building mat 9 construction, as shown in Figure 4, after installing the wire mesh (ribrass), the reinforcing material 10 is assembled. The circulating water pipes 3 and 4 are buried, the concrete 11 is placed, and the turbine building mat concrete 9 is placed at the same time. At this point, the circulating water piping work to be buried under the turbine building mat and the turbine building mat work have been completed, and work on the turbine building frame will continue.

In this way, it becomes possible to remove the construction of the circulating water piping buried under the turbine building pine from the critical path of the framework construction of the entire turbine building, and the construction period for the framework of the entire turbine building can be significantly shortened. In addition, since the circulating water piping area and the turbine building pine area are separated by a wire mesh (ribrass), the circulating water piping buried concrete and the turbine building pine concrete can be poured at the same time, and the concrete after the circulating water piping buried concrete is placed. The effect of shrinkage can be eliminated.

Furthermore, the workability and safety of turbine building frame work can be significantly improved.

Although the present invention has been described above with reference to specific examples, the present invention is not limited to these specific examples, and it goes without saying that many changes and modifications can be made without departing from the spirit of the present invention. .

[Brief explanation of the drawing]

Figure 1A is a longitudinal cross-sectional view showing the equipment arrangement near the circulating water piping, Figure 1B is a view of Figure 1A taken along line B-B and viewed in the direction of the arrows, and Figure 2 is a conventional turbine. A diagram for explaining the building construction method, FIG. 3A is a diagram for explaining the pine underlayment construction according to the present invention,
FIG. 3B is a diagram of FIG. 3A cut along line BB and viewed in the direction of the arrows, and FIG. 4 is a longitudinal sectional view for explaining the construction method of the present invention. 1... Anchor material, 3... Circulating water piping, 4...
Circulating water piping, 2... Concrete, 6... Wire mesh (librass), 7... Beam steel, 9... Matsut, 10
... Reinforcement material, 12 ... Condenser, 13 ... Water chamber, 1
1...Concrete.

Claims (1)

[Claims] 1. In the turbine building construction work, the cooling water piping area for steam condensation buried under the pine and the pine are separated by a wire mesh, and the concrete work for the cooling water piping area and the pine concrete work are performed at the same time. Turbine building construction method.