JPH02236362A - Steel framed column erecting method - Google Patents

Abstract

PURPOSE:To improve work efficiency by engaging the bolt holes of a base plate fixed at a steel framed column with the tallest bolt among anchor bolts planted on a body so as to be positioned and then erecting the steel framed column. CONSTITUTION:A steel framed column 4 provided with a base plate 5 fitted at the lower end face is hoisted by a crane and positioned directly above a concrete body 1. The bolt hole of the plate 5 corresponding to a bolt is engaged with the tallest anchor bolt among anchor bolts 21, 22, 23, 24 planted at the body 1. The steel framed column 4 is then rotated around the anchor bolt 21 as an axis so that the respective bolt holes and bolts 22-24 come to face correctly. The steel framed column 4 is then lowered, the anchor bolts 22-24 are pierced through the corresponding bolt holes so as to bring the plate 5 into contact with the surface of the body 1. Furthermore, the steel framed column 4 is fastened to the body 1 by means of double nuts 7, and thus the steel column 4 is erected inside the body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for erecting a steel frame column for quickly and safely erecting a steel frame column onto anchor bolts planted in a concrete Hm body.

[Conventional technology]

Conventionally, multiple anchor bolts of the same length are planted in the concrete frame at the installation location of the steel column, with their threaded parts protruding the same height from the frame surface, and then suspended almost vertically using a crane, etc. A method of erecting a steel frame column was to simultaneously engage a plurality of anchor bolts into a plurality of bolt holes drilled in a base plate forming the lower end surface of the steel frame column.

[Problem to be solved by the invention]

However, in the conventional method of erecting steel columns as described above, all the holes drilled in the base plate of the suspended steel column are placed in positions where the holes accurately face all the corresponding anchor bolts. After that, the steel column is gradually lowered and the anchor bolts are engaged with the bolt holes. Correctly and simultaneously, it is not easy to correct the axial return of the steel column and to stop the rocking motion, which poses the problem of requiring an extremely large amount of time and effort.

This invention was made in view of these conventional problems, and aims to solve the above problems by installing a single anchor bolt that also serves as a locate in the concrete frame at the location where the steel column is installed. The purpose is

[Means to solve the problem]

In this invention, an anchor bolt having a plurality of required anchoring parts is preliminarily attached to a concrete frame at the installation position of a steel column with a base plate horizontally attached to the lower end surface, and the required threaded part is made to protrude by the same length from the concrete frame surface. At the same time, the threaded portions of the plurality of anchor bolts are longer than the thickness of the base plate added to the threaded portions of the anchor bolts, and one locating anchor has the same anchoring length as the anchor bolts. Bolts are installed in the concrete frame higher than the installation height of the plurality of anchor bolts, which is equal to or higher than the installation height plus base play 1 - thickness, and the steel column is erected. At this time, among the bolt holes corresponding to the anchor bolts drilled in the base plate, first, the anchor bolts that also serve as anchor bolts and the corresponding bolt holes are engaged and positioned, and then the steel column is erected. This method of constructing steel columns is characterized by:

[Effect]

In this invention, since the structure is as described above, when a steel column is erected, the steel column is suspended almost vertically facing the erecting position, and first, a single locating anchor bolt is attached to the base plate. When the corresponding bolt holes are engaged, the location of the concrete structure with the base plate and anchor bolts installed will be determined by the location of the anchor bolts that also serve as locating bolts. They face each other while being relatively shifted in the direction of rotation around a common axis. Therefore, by correcting the steel column by rotating it by a relatively shifted angle around the locating anchor bolt, all the anchor bolts can be easily engaged with the corresponding bolt holes in the base plate at the same time. Therefore, steel columns can be erected much more easily and in a shorter time than in the past.

〔Example〕

The present invention will be explained below based on the drawings. 1 to 5 are diagrams showing an embodiment of the present invention. FIG. 1 is a plan view of the concrete frame 1 at the installation position of the steel columns, and shows 2+. 2z. 2ff+24 indicates an anchor bolt installed in this concrete III body 1. Second
The figure is a side view of Figure 1 seen from a certain angle convenient for explanation, and all anchor bolts have the same anchoring length j2l.
is buried in the concrete Meitai 1. And other anchor bolts 2■, 23, except anchor bolt 21,
24 is the same height 2■ from the concrete frame surface 1a? It is planted with the bent part protruding. Anchor Bolt 2, is better than other anchor bolts! ! ．． 3, and therefore the concrete effl body surface 1a is 2■+
! , with the threaded part protruding by a height of .

Here, 13 is formed to be slightly longer than the plate thickness d of the base plate 5 horizontally attached to the lower end surface of the steel column 4 shown in FIG. 61.6g shown in Figure 3. 63.6
4 is a bolt hole provided in the base plate 5,
The distance between these bolt holes is determined by the anchor ports 2, 2, . The dimensional positions are exactly the same as the mutual spacing of 2, 1.2.

Next, a method of erecting the steel columns 4 in the concrete frame 1 configured as described above will be explained.

First, a steel column 4 is suspended almost vertically by a crane or the like.
is positioned directly above the concrete frame 1. At this time, in most cases, the base plate 5 does not correspond correctly to the concrete frame 1 where the steel column 4 is installed. I mean, everything? The anchor bolt and the bolt hole of the base plate 5 are in a positional relationship that is shifted from each other.

Therefore, it is very time consuming to align the bolt holes so that they match all the anchor bolts at the same time.
First, the tallest anchor bolt 21 is engaged with the corresponding bolt hole 6. Engaging only one anchor pole I can be done relatively easily in practice. By this engagement, the base plate 5 is positioned relative to the concrete frame 1 at one point that can be used as a reference. That is, as shown in Fig. 3.4, the anchor bolt 2 is the reference axis in this state, so in this state, the base plate 5, that is, the steel column 4 is moved in the eight directions of the arrow in Fig. 3 with the anchor bolt 21 as the axis By rotating bolt hole 6■ to anchor bolt 2, bolt hole 63
and the bolt holes 64 and 64 respectively face the anchor bolts 23 and the anchor bolts 24, respectively. In this state, when the steel column 4 is gently lowered, each anchor bolt passes through its corresponding bolt hole, and the base plate 5 is attached to the concrete frame surface 1a.
comes into contact with. Therefore, by tightening the base plate 5 to the frame 1 with the double nuts 7, the steel column 4 is reliably built into the frame 1.

In this embodiment, a case is shown in which there are three anchor bolts of the same height, but it goes without saying that the present invention is not limited to three anchor bolts.

[Effects of the Invention] As explained above, according to the present invention, when erecting a steel column, only one anchor bolt is required for hole alignment, so installation can be done by a small number of people, and there is less vibration during installation, making it safer. Can work. Therefore, work efficiency is significantly improved.
Many effects can be obtained.

[Brief explanation of drawings]

Figure 1 is a plan view of the concrete-He body at the installation position of the steel column, Figure 2 is a sectional view taken along the line n-■ in Figure 1, and Figure 3
The figure is a plan view of the base plate engaged with the locating anchor bolt, and what about figure 4? 3 is a sectional view taken along IV-■, and FIG. 5 is a side sectional view when the steel column is erected. l... Concrete frame, 2.・・・・・・Anchor bolt that also serves as a gate, 2■, 2. ,2.・・・・・・
... Anchor bolts of the same height, 4 ... Steel column, 5 ... Base plate, 6,, 6 ■, 6. ，
64...Bolt hole. Calyx 4

Claims (1)

[Claims] (1) In advance, attach multiple anchor bolts of the same length to the concrete frame at the installation position of the steel column with the base plate horizontally attached to the lower end surface, with the threaded parts of the bolts protruding the required length from the concrete frame surface to the same height. At the same time, one anchor bolt that has the same fixing part as the plurality of anchor bolts and has a threaded part longer than the base plate thickness is installed in the anchor bolt of the plurality of anchor bolts. It is planted in the concrete frame at a height higher than the planting height plus the base plate thickness, and corresponds to the anchor bolt drilled in the base plate when the steel column is erected. A method for erecting a steel frame column, characterized in that the steel column is erected after first engaging and positioning the locating anchor bolt and the corresponding bolt hole among the bolt holes.