JPS6245837A - Construction work for foundation of turbine generator - Google Patents

Abstract

PURPOSE:To shorten the period of construction by a method in which precast concrete plates are assembled into a formwork and concrete is placed into the formwork to form a turbine generator foundation using the concrete plates as outer walls. CONSTITUTION:Lower connecting metals 11 are welded to metals 1a buried when a foundation mat 1 is constructed, reinforcing bars 12 are set on the mat 1, and reinforced precast concrete plates 13 are assembled to be a concrete formwork. Bolts 14 buried in the plates 13 are inserted into the holes of the metals 11 and clamped with nuts 15 to erect the plates 13 on the mat 1. The recessed portion of the upper end of the plate 13 is fitted on a projection 16a of the lower end of the plate 16 for the next stage, and the upper and lower parts of a connecting metal 17 on the side of the jointed portion are clamped with bolts 14 and nuts 15 to connect the plates 13 and 16. After the plates 13 and 16 are assembled to a given height, concrete is placed and cured for hardening.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a turbine power generator F! in which a turbine and a generator are installed. 1 foundation (hereinafter referred to as T/G pedestal)! Concerning improvements to construction methods for turbine generator foundations.

[Technical background of the invention]

First, the configuration of a general T/G pedestal will be explained based on FIG. 3.

T/G pedestals are equipped with turbines and generators.
It is a foundation stand on which a foundation is installed, and has a plurality of pillar parts 2 and a beam/floor part 3 that stand on a foundation mat 1.

In addition, the T/G pedestal is a huge structure C, for example, for a 1.1 million KW class turbine, the length is about 707/L,
It is built approximately 15m wide and 30m high. For this reason, when constructing the T/G pedestal, the entire length is divided into three blocks A, B, and C as shown in Figure 3.
The height direction is divided into 4 blocks W, X, Y, and Z and constructed sequentially.

Next, a conventional construction method will be explained based on the construction procedure shown in section A-W in FIG. 3.

As shown in FIG. 4, first, a cast concrete model of the foundation mat 1, reinforcing bars 4 are arranged, and a coccrete formwork 5 is assembled. Next, the concrete formwork 5 is fixed with a formwork holder 6, and concrete 7 is poured. After pouring the concrete 7, the formwork holder 6 is removed and the concrete formwork 5 is dismantled after a curing period of approximately four weeks. Continuing with the same procedure, start-up work will be carried out sequentially for sections tA-X, △ and 7 as shown in Figure 3. The work on parts 8 and 0 will be carried out in parallel with part A as long as they do not interfere with each other.

After completing the concrete pouring up to the level of each of the seven sections, when constructing each of the seven sections, anchor bolts for installing the turbine and power generator are set, and concrete pouring for each of the seven sections is carried out in parallel. , T/G Bedistal has been completed.

After completion of T/G pedestal, T/G pedestal-L
The surface 8 is cured with an iron plate 9, and a large glue D- is placed on this iron plate 9.
Equipped with Rough Lane 10. As a result, the crawler crane 10 is used for carrying in and installing large equipment into the turbine building until the overhead crane of the turbine building starts operating.

FIG. 5 shows a process for constructing a turbine building and installing equipment including such a conventional turbine generator foundation construction method.

As shown in Fig. 5, the construction of the T/G Bedistal was started after the completion of laying the first foundation mat. It will be completed, for example, approximately 16 months after the start of construction on mat 1, and the crawler crane 10 will be able to be installed.This crawler crane 10 will be used to carry in and install equipment inside the turbine building, and then will be used for roof construction of the turbine building and the crane. To avoid the boom interfering with the base pine 1~1
It will be demolished approximately 20 months after construction began.

[Problems with treachery technology]

However, the conventional turbine generator foundation construction method described above has the following problems.

In other words, the T/G pedestal construction work was prolonged because after the concrete was poured, the concrete had to be allowed to cure and harden for approximately 4"i5, and then the work on the upper floors had to be started.

For this purpose, work such as loading a large crawler crane 10, transporting equipment, etc. after T/G pedestal construction work is required.
This caused delays in installation and was the main reason for the prolongation of the turbine building construction period.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and its purpose is to provide a method for constructing a turbine generator foundation that can significantly shorten the first period of construction of a turbine generator foundation and reduce the number of man-hours. 1゜ [Summary of the Invention] In order to achieve the above object, the present invention provides a method for constructing a turbine generator foundation on which a turbine and a generator are mounted, using a method for constructing a turbine generator foundation on which a precast concrete plate is placed in concrete. The feature is that after assembling the formwork, concrete is poured, and this precast concrete plate is used as the outer wall of the turbine power generation R foundation.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

FIG. 1 is a partial cross-sectional view for explaining one embodiment of the present invention, and shows the construction procedure of the A-W section of a T/G bedstone constructed as shown in FIG. 3.

In this embodiment, first, a lower connecting metal fitting 1 is placed in a predetermined position of an embedded metal fitting 1a buried during construction of a foundation mat 1 of a turbine building.
Weld one end of 1. Next, attach the reinforcing bars 12 to the foundation pines 1 to 1.
After assembling on the top, a PC board (precast concrete 1 to board) 13 with reinforcing steel is used as a concrete formwork and assembled. [-) A required number of stud bolts 14 are installed in advance on the C plate 13, and these stud bolts 14 are inserted into the holes of the lower connection fitting 11, and the nuts 15 are tightened (), and the studs are placed on the base mat 1. Set up

Four parts 13a are cut out at the upper end of the PC board 13 placed on the base mat 1, and are fitted into the convex part 16a at the lower end of the next PC board 16. . Connecting fittings 17 are attached to the sides of these fitting parts, and stud bolts 14 are inserted through the -F part and the lower part of the connecting fittings 17.
Tighten the nut 15 to connect both PC boards 13 and 16 in the vertical direction.

After these PC boards 13 and 16 are assembled to the required height, concrete 18 is placed and cured to harden. This is repeated sequentially toward the X, Y, and Z sections and toward the upper layer to start up the A block. In parallel with this A block, B
, Block C will also be erected using the same construction procedure to complete the T/G pedestal.

After the r/G pedestal is completed, as shown in Fig. 3, a steel plate 9 is laid on the top surface 8 of the pedestal for curing, and a large crawler crane 10 is mounted on the steel plate 9 to carry the turbine. Used when transporting and installing equipment inside the building.

Therefore, according to this embodiment, since the reinforcing PC board 13 is assembled as a concrete formwork, the temporary construction and dismantling work of the conventional concrete formwork is not necessary, and the P.S.
Since the C plate 13 itself already has strength when assembled as a concrete formwork, construction of the upper layer can be immediately started without waiting for the curing and hardening period of the poured concrete.

In addition, the PC board 13 that is assembled into the concrete formwork is prefabricated in a factory, has uniform quality, and has a beautifully finished surface, so the finishing work of the concrete pouring surface, which was done in the conventional example, can be omitted. be able to.

For this reason, in this embodiment, the T/G bedstone was completed approximately 12 months after the start of construction of the foundation mat 1, as shown in Figure 2, whereas the conventional example required approximately 16 months, as shown in Figure 5. Compared to the conventional method, it is possible to shorten the TI construction period by about four months, as shown by the dashed line in Fig. 2.

As a result, the masonry work for various works after the T/G Bedistal erection work will be postponed one by one by the shortened construction period. For example, the time for loading the crawler crane 10 onto the T/G pedestal is approximately four months earlier than in the conventional example, and all subsequent work is also completed earlier.

〔Effect of the invention〕

As explained above, the present invention is a turbine generator for constructing a turbine generator foundation on which a turbine and a generator are placed. 1. In the foundation construction method, precast concrete plates are assembled as a concrete formwork, then concrete is poured, and the precast concrete plates are used as the outer wall of the turbine generator foundation.

Therefore, according to this embodiment, since the tin 1 nost concrete plate is used as the concrete formwork and assembled at °C, the conventional temporary construction and dismantling of the concrete formwork is not necessary, and the precast concrete plate itself can be used as the concrete formwork. Because it already has strength when assembled,
It is possible to immediately proceed to the construction of the upper layer without having to wait for curing and hardening of the poured concrete.

Furthermore, since precast concrete plates are manufactured in a factory and have uniform quality and a beautifully finished surface, it is possible to omit the finishing work of the concrete pouring surface, which is conventionally performed.

As a result, this embodiment can reduce the number of man-hours for constructing the turbine generator foundation and significantly shorten the construction period.

[Brief explanation of drawings]

FIG. 1 is a partial longitudinal sectional view showing a part of a turbine generator foundation for explaining the construction procedure of an embodiment of the turbine generator i foundation construction method according to the present invention, and FIG. Fig. 3 is an overall configuration diagram of a general turbine power generation m foundation to which the embodiment shown in Fig. 1 is applied, and Fig. 4 explains the conventional construction method. FIG. 5 is a partial vertical cross-sectional view of a turbine generator foundation for the purpose of the present invention, and is an arrow diagram showing the construction process of the conventional construction method shown in FIG. 4. 1...Foundation mat, 2...Column section, 3...Beam/floor section, 12...Reinforcement bar, 13...PC board (precast concrete board), 18...Concrete. Representative Patent Attorney Noriyuki Chika Yudo Hirofumi Mimata Figure 4

Claims (1)

[Claims] In the turbine generator foundation construction method for constructing a turbine generator foundation on which the turbine and generator are mounted,
A method for constructing a foundation for a turbine generator, which comprises assembling precast concrete plates as a concrete formwork, then pouring concrete, and using the precast concrete plates as an outer wall of the turbine generator foundation.