JPH026904B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vertical pipe construction method for vertically piping pipes for cooling and heating, hot water supply, drainage, etc. in high-rise buildings, which improves construction accuracy, shortens construction time, and improves safety. This was done with the aim of improving the quality of construction work and simplifying construction management.

The vertical pipe construction method usually involves installing the necessary vertical pipes inside the shaft after the building is erected, and for high-rise buildings, there is a lot of on-site work such as lifting, connecting, extending, fixing, and absorbing expansion and contraction. Requires significant focus on construction management. For example, in typical conventional construction methods, piping work is usually carried out inside a shaft formed to install vertical pipes after concrete work for a building is completed; For each floor, the cut pipes are carried up for connection from one floor to the next, and while the pipes are taken into the shaft (either by lifting them up or by hanging them down). The method used is to add pipes one by one inside the shaft from the bottom to the top, but since the inside of the shaft is small and poorly ventilated, the work to connect the pipes (which usually involves welding) is extremely difficult. It has become dangerous work. In particular, if the shaft does not have a floor, this work must be carried out using a suspended scaffold, and there is a risk of falling pipes, collisions during transport, and even the risk of stepping off the scaffold. And this risk increases as you get higher up. In addition, the pipes carried to the upper floors must be cut to a length that can be transported within the building and inserted into the shaft from that floor. is usually cut to a length of 2.0 to 2.75 m, so the number of joints within the shaft will inevitably increase until the entire length is connected, and if there are many pipes, the welding points will be very difficult. This requires a great deal of effort, and it is very difficult to improve accuracy in areas such as extrusion and expansion/contraction absorption.

The present invention solves the problems of the conventional vertical pipe construction method, and has developed a vertical pipe construction method for high-rise buildings that streamlines on-site work as much as possible and improves construction accuracy. That is, the present invention
When installing a predetermined number of mutually parallel vertical pipes in a high-rise building, a plurality of short pipes with equal lengths for multiple stories are hung from hanging hardware parallel to each other with construction intervals. The process of vertically lifting a short pipe unit constructed of The process of connecting the upper end of the lower floor pipe group at the node where the steel frame erection is substantially completed or the node below it is carried out in parallel with the progress of the steel frame erection of the building. It is characterized in that the vertical pipe group is fixed at any floor using a fixing hardware less than the number of times the short pipe unit is connected. In this case, the short pipe unit can be pre-assembled in a factory.

This construction method will be specifically explained below according to an example (construction example of a 37-story building in Tokyo) shown in the drawings.

This example is an example in which a total of six vertical pipes are set up vertically, and a short pipe unit is constructed by dividing a group of six pipes (consisting of a cold water return pipe, a steam pipe, and a drainage pipe) into two parts of three pipes each. This is an example of a product manufactured in a factory and transported to the site for construction.

Figures 1 and 2 show a short pipe unit 1 having a length equivalent to four floors being lifted by a tower crane 2, and Figure 1 is a lifting diagram of node (N-1) ( The hanging procedure will be described later in Figure 7), and Figure 2 shows N
Knot hanging diagram (the hanging procedure will be explained later in Figure 9)
It is. As seen in these figures, each short pipe unit 1 (hereinafter simply referred to as unit 1) is lifted and suspended by a steel frame erection tower crane 2 along the progress of steel frame erection.

Each unit 1 consists of three short pipes (having a length of four stories) fixed at predetermined intervals (construction intervals). This fixing is done at the 3rd to 4th place at the factory.
This is done using the temporary fixing hardware 3 shown in the figure and the hanging hardware 4 shown in FIG. The temporary fixing hardware 3 is used for temporary fixing when transporting the unit by truck to the site yard, and the hanging hardware 4 shown in Fig. 5 is attached near one end of the unit 1, As shown, a wire 5 is connected to this hanging hardware via a shackle 6 to the hook of a tower crane 2, which is used to lift it. During this lifting, the temporary fixing hardware 3 is removed. As the temporary fixing hardware 3 and the hanging hardware 4, it is convenient to use U-bolts 7 as shown in the figure to fix each pipe to the hardware.

The lifting procedure for the (N-1) section is described according to Figure 7.The concrete placement of the floors (N-1), 3F, (N-1), 2F, and (N-1) has been completed. )・1F,
(N-1) - Suspend the unit so that it passes through each sleeve opening 8 of 4F, remove the wire 5 of the hanging hardware 4, and then move the tower crane to the next unit (total of 6 vertical pipes, 3 Since it is constructed using two sets of units consisting of pipes, two sets of units are required at each node). In this state, the unit is attached to N-1/3F by the hanging hardware 4.
The lower end of the unit's pipe is
It is located slightly above the top of the pipe at node (N-2). Next, the U bolts of the hanging hardware 4 are loosened, and each pipe of the (N-1) node is placed on each pipe of the (N-2) node. In this case, it is preferable that a guide 9 as shown in FIG. 8 be attached to the upper end of each pipe by welding in advance, and that each pipe end should also be tapered 10. Next, attach the hanging hardware 4 to this (N-
1)・Fix on the 3rd floor with anchor bolts and complete centering. Furthermore, after the subsequent floor plate work at section N is completed, the main welding after joining the pipes at section (N-1) and section (N-2) is performed, and the hanging hardware 4 is removed and placed for the next suspension. Change.

Next, the procedure for lifting the N section (steel frame erection section) will be described according to Figure 9. First, the N section top pipe (N 3F)
Attach sleeve 11 to. This sleeve 11
It is better to hang them together and take them into N.3F when hanging the (N-1) node. The N-joint unit is suspended in this sleeve 11 to release its own weight (remove the wire). At this time, the gap between the (N-1) node and the pipe should be approximately 4 to 5 cm. After that, (N-
1) Follow the same procedure as described in section (N-1) to connect the pipe at section (N-1) and remove the hanging hardware 4. However, when centering the N section, as shown in Fig. 10, the three-split sleeve 12 is divided into (N-1)・4F, N・1F,
It is preferable to attach the angle bead 13 to the sleeve 12 by spot welding it to the sleeve 12.

In this way, units are successively connected as the steel frame erection progresses. In other words, at the node where the steel frame erection has essentially been completed, the tower crane for that steel frame is used to lift the unit, and the connection between this lift and the existing pipe group is carried out at the node where the steel frame erection has been completed or at that point. The work carried out in the sections below will be carried out in parallel with the progress of steel frame erection. but,
The final strength cannot be guaranteed only by fixing to the sleeve during this hanging. Therefore, the number of fixed floors of the vertical pipe to be formed is determined to be the required number. At that time, the fixing of the three parts described above also provides a certain holding force, so even if the number of fixed floors (fixed number of times) is much less than the number of connected units (in the case of a 35-story building, even if there are 1 to 5 units) )good. On this fixed floor, the 11th
It is preferable to use a fixing hardware 15 as shown in FIGS. This fixed hardware 15 connects the base plate 17 of the pipe holder 16 from all sides to the frame 19 via vibration isolating rubber 18.
It is recommended that the pipe be connected to the pipe so that it can be fixed elastically. On the other hand, on the free floor where this fixed hardware 15 is not used,
It is best to install a steady rest as shown in Figure 13.

This steady rest construction consists of sleeve 8 and pipe 20.
It is preferable to attach a urethane or wooden interposition material 21 to the outer periphery of the pipe 20 in the gap, spread rock wool 22 on the outside, and pour mortar 23 into it. It is convenient to perform this steady rest construction at the same time as heat insulation construction (first step).
24 in Figure 3 indicates a heat insulating material such as glass wool).

As described above, this construction method uses the tower crane for the steel frame construction at the node (N node) where the steel frame erection of a high-rise building is substantially completed, before placing concrete at the N node. A pipe unit in which relatively long pipes of the same length are fixed to each other with an interval of This involves joining work, and basically vertical pipe work is also done during steel frame work.
Most of the problems previously mentioned, such as pipe connection work within the shaft after concrete work is completed, can be avoided. In other words, since it is not necessary to transport the pipe to the completed building level, the length of the pipe used in the present invention is long enough to cover four floors as in the illustrated embodiment. For this, you can use
The entire length of vertical pipes can be connected with fewer connections, and each pipe is suspended by a hanging hardware at predetermined intervals, which greatly improves construction accuracy, including the welder. The connection work is also much better in terms of danger and workability compared to the conventional work inside the shaft, which is carried out in a narrow existing space. Therefore, according to the present invention, the vertical pipe group can be constructed rationally as the steel frame erection progresses, and compared to the conventional construction method after the vertical shaft is completed, it is possible to construct the vertical pipe group more easily than with other construction work. It is possible to accurately and safely construct a group of vertical pipes for a high-rise building without having to worry about complicated adjustments and management of on-site work.

[Brief explanation of drawings]

Fig. 1 is a construction drawing of section (N-1) when the unit is suspended according to the method of the present invention, Fig. 2 is a construction drawing of section N when the unit is suspended, Fig. 3 is a plan view of the temporary fixing hardware,
Figure 4 is a front view of Figure 3, Figure 5 is a front view of the hanging hardware, Figure 6 is a front view showing how the hanging hardware is used, and Figure 7 is when the unit at section (N-1) is suspended. Fig. 8 is an enlarged view of the pipe connection, Fig. 9 is a drawing of the N-section unit when it is suspended, Fig. 10 is a plan view of the three-split sleeve, and Fig. 11 is a plan view of the fixing hardware. 12 is a front view of the fixing hardware, and FIG. 13 is an enlarged sectional view of the swing stop construction part. 1...Unit, 2...Tower crane, 3...
... Temporary fixing hardware, 4... Hanging hardware, 8, 11, 12
... Sleeve, 15 ... Fixed hardware, 23 ... Urethane or wooden interposition material.

Claims (1)

[Claims] 1. When arranging a predetermined number of mutually parallel vertical pipe groups in a high-rise building, a plurality of short pipes having mutually equal lengths of multiple stories are hung parallel to each other on hanging hardware. The process of vertically hoisting short pipe units configured to be suspended at construction intervals using a tower crane for steel frame erection at the joint where steel frame erection has substantially completed; The process of connecting the lower end of the pipe unit to the upper end of the existing lower floor pipe group at the node where the steel frame erection is substantially completed or the node below it is carried out in parallel with the progress of the steel frame erection of the building. A vertical pipe construction method for a high-rise building, characterized in that the group of vertical pipes formed is fixed using a fixing hardware on any floor with a number of fixing times that is less than the number of times that the short pipe units are connected. 2. The vertical pipe construction method according to claim 1, wherein the vertical pipe group includes a cold water pipe, a steam pipe, and a drainage pipe. 3. The vertical pipe construction method according to claim 1 or 2, wherein the short pipe unit is assembled in advance in a factory.