JP2001329646A - Piping pit in steel structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To propose an excellent piping pit in a steel structure, which can cope with easily renewal of plant layout, can be formed at a low cost, and dispenses with an inconvenience of reduction in a ceiling height and an inconvenience of increase in a story height. SOLUTION: The plant layout pit A is for use in the steel structure, which is constructed by forming groove-like recesses in parts of a steel reinforced concrete floor 2 placed on beams, and laying pipes 3 in the recesses. A pit A1 extending in a direction perpendicular to a small beam is formed so as to intersect a location above a notch which is formed by reducing the size of the small beam 5 at end portions thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an equipment piping pit in a steel structure.

[0002]

2. Description of the Related Art Various improvements have been made to equipment piping (supply / drainage, electricity, gas, etc.) in various rooms in preparation for future renewal. In addition to a steel structure, for example, a PC steel material is installed inside a reinforced concrete beam. Are arranged in a catenary line, and the center of the 1-span beam is made smaller than both ends to form a haunch of equal cross-section at both ends, and the recess at the center of the beam is used as a piping space. Architectural frame (Patent Publication 5-18)
No. 977), and a pair of PC beams are integrally connected by a PC floor at an intermediate position in the height direction of the pair of PC beams to form a substantially H-shaped cross section.
A small beam integrated type P with a piping space formed above the PC floor
C floorboards (Patent Publication No. 6-37795) have been proposed.

[0003] In a steel structure, there are many cases in which a floor above a skeleton is a free-access double floor, and piping is provided inside the floor, or is penetrated through the floor and installed in a ceiling.

[0004] In the case of a double floor, free piping positions are possible, but there are drawbacks such as the double floor finishing being expensive and the building floor height being high. In addition, in the case of piping in the ceiling, it traverses as shown in Japanese Patent Laid-Open Publication No. 2-56454, "a steel frame structure using small beams in which a square air-conditioning duct penetration space is provided at the center of the longitudinal middle part". The beams must be provided with through holes or piped down to avoid the beams. However, in the steel frame structure disclosed in Japanese Patent Application Laid-Open No. 2-56454, the shape, size, and the like of the through holes are different from the piping space because of the duct space.

In the former case, the piping to be laid is easily restricted. In other words, small beams in a steel frame structure generally use H-shaped steel, but it is common to preliminarily form a required circular hole or the like in a required portion of the web, and therefore lacks the flexibility of piping. In addition, a ring plate is generally welded to the peripheral portion of the perforated portion, which increases the cost. The latter has a disadvantage that the ceiling height is reduced.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned points, and it is easy to renew piping equipment, and it can be formed at low cost. An object of the present invention is to propose an equipment piping pit in an excellent steel frame structure without increasing inconvenience.

[0007]

According to a first aspect of the present invention, there is provided an equipment piping pit in which a part of a reinforced concrete floor 2 cast on a beam is formed in a groove shape and a piping is provided inside the pit. 3 is a facility piping pit A in a steel structure in which a small beam 3 is laid, and a pit A1 in the direction perpendicular to the small beam is configured to cross over a notch 6 formed with a small beam at the end of the small beam 5. It was configured as a facility piping pit in a steel structure characterized by:

[0008] Further, the equipment piping pit according to the second aspect of the present invention,
The small beam 5 is made of an H-shaped steel, and a reinforcing plate 11 is fixed on a horizontal cut surface of the cutout 6 to constitute a piping facility pit in a steel structure according to claim 1.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

[0010] The equipment piping pit of the present invention is provided in a steel frame structure and is integrally provided in a groove shape on a casting surface of a concrete floor on which large beams and small beams are assembled. A part of the floor is recessed in a groove shape, and piping is laid inside. Further, the pit A1 in the direction perpendicular to the small beam is configured so as to cross over a notch portion having a small beam at the end of the small beam.

For example, in FIG. 1, A indicates a facility piping pit, and this pit is formed by recessing a part of a reinforced concrete floor 2 in a groove shape and laying a pipe 3 therein. In the example shown,
A notch 6 is formed at each end of a small beam 5 provided between a pair of girders 4, and a pit A1 is formed in a direction perpendicular to the small beam so as to cross over the notch 6. Since the bending stress is small at both ends of the small beam 5, the beam structure can be reduced in accordance with the stress. Therefore, sufficient strength can be obtained even if the notch is provided. The connecting portion of the small beam 5 with the large beam 4 adopts a known connecting method (for example, a known method of connecting with bolts via a plate protruding from the large beam) and is omitted in the drawings. . In the figure, reference numeral 7 denotes a ceiling.

As the small beam 5, a steel frame material used for a small beam of this kind of steel structure can be used, and an H-shaped rope is mainly used. FIG. 2 shows an example in which a notch 6 is provided in an H-shaped rope 8 as a small beam 5, and the notch 6 is cut and removed by cutting and removing the upper end of the H-shaped rope connected between the upper and lower flanges 9 by a web 10. Has formed. Although the notch 6 may be used as it is, as shown in FIG. 3, the notch 6 may be reinforced with a horizontal reinforcing plate 11 according to stress. The reinforcing plate 11 is fixed on a horizontal cut surface of the cutout 6 by fixing means such as welding.

Further, the plane form of the facility piping pit A can be selected from various forms, for example, two parallel forms as shown in FIG. 4 and a plan view H as shown in FIG.
Various shapes such as those having a shape or a T-shape in plan view as shown in FIG. 6 can be adopted, and the present invention is not limited thereto.

In the embodiment shown in FIG. 4, four pillars 12 arranged in a rectangular shape are connected to each other by a girder 4, and the girders 4 on the long sides are formed.
It has a form in which two small beams 5 are connected at equal intervals, and notches 6 are provided at both ends of each small beam 5, and crosses the upper side of the notch 6 in a direction perpendicular to the small beam. The pit A1 is provided.

The embodiment shown in FIG. 5 is similar to the one shown in FIG.
2. In the configuration of the girders 4, a pair of small beams 5 is erected at the center in the front-rear direction, and a pit A2 is formed between the small beams 5 in a direction parallel to the small beams. Notches 6 are provided at both ends to form pits A1 in the direction perpendicular to the beams, and the pits A1 in the direction perpendicular to the beams and the pits A2 in the direction parallel to the beams are integrally connected. are doing.

The embodiment shown in FIG. 6 is similar to the pillar 1 shown in FIG.
2. The structure of the girders 4, the front and rear direction 2 between the left and right girders 4
A small beam 5 is erected at about / 3, and a pair of small beams 5 is erected at predetermined intervals at the left and right central portions of the large beam 4 in front of the central portion of the front portion of the small beam. The pit A2 is formed so as to be parallel to the small beam. A notch 6 is provided at the rear end of each parallel beam 5 to form a pit A1 in the direction perpendicular to the beam and a pit A1 in the direction perpendicular to the beam and a pit A2 in the direction parallel to the beam. Are configured to be connected together. In this way, the beam and the pit A1 in the direct direction
The actual direction changes depending on the assembling form of the beam.

[0017]

As described above, the equipment piping pit in the steel structure according to the present invention can be manufactured at a very low cost by processing a simple small beam by using the above-described structure, and the penetration through the beam can be achieved. Compared to the case where the pipe is formed by drilling holes, the pipe has flexibility and the cost is low. Further, the piping can be performed without the disadvantage that the height of the ceiling is reduced or the height of the first floor is increased.

Further, the equipment piping pit according to claim 2 of the present invention
Although the cost is slightly higher, it has an advantage that it can easily cope with a large stress if necessary.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an example of a facility piping pit of the present invention.

FIG. 2 is a side view of an essential part showing an example of a small beam having a notch in the present invention.

FIG. 3 is a side view of a main part showing another example of a small beam having a notch in the present invention.

FIG. 4 is an explanatory diagram showing an example of a planar arrangement of the facility piping pit of the present invention.

FIG. 5 is an explanatory diagram showing another example of the planar arrangement of the facility piping pit of the present invention.

FIG. 6 is an explanatory view showing still another example of the planar arrangement of the facility piping pit of the present invention.

[Explanation of symbols]

2 ... reinforced concrete floor, 3 ... piping, 4 ... girder, 5 ... small beam, 6 ... notch, 7 ... ceiling, 8 ... H-shaped rope, 9 ... flange, 10 ... web, 11 ... reinforcing plate, 12 ... pillar, A: Equipment piping pit, A1: Pit in the direction perpendicular to the beam, A2: Pit in the direction parallel to the beam

Claims (2)

[Claims] 1. A facility piping pit A in a steel frame structure in which a part of a reinforced concrete floor 2 cast on a beam is recessed in a groove shape and a pipe 3 is laid therein, the pit A being in a direction perpendicular to the small beam. The pit A1 has a notch 6 with a small beam at the end of the small beam 5.
An equipment piping pit in a steel structure characterized by being configured to cross over. 2. The equipment piping pit of a steel structure according to claim 1, wherein said beam 5 is H-shaped steel, and a reinforcing plate 11 is fixed on a horizontal cut surface of the notch 6.