JPH0379490B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for wrapping the legs of a steel column in a building.

(Conventional technology) In conventional root wrapping construction for steel column legs, anchor bolts are set in the predetermined positions at a location considerably below the ground level before the footing is placed, the steel column is erected, and then Wrap the pillar hoop, set the formwork,
After pouring concrete, the formwork is removed and backfilling is performed.

(Problems to be solved by the invention) Therefore, the conventional method requires a lot of man-hours;
The area around the pillars could not be backfilled until the steel frame was erected, resulting in poor scaffolding and construction problems. Furthermore, since the anchor bolt is located considerably below the ground surface, it is difficult to center the anchor bolt, making it difficult to achieve accuracy.

(Means for Solving the Problems) The present invention was proposed to solve these problems, and after constructing a foundation footing, a column base support frame is installed at a predetermined position on the footing. A steel column pedestal characterized in that a formwork is set and the footing is backfilled, a steel column is erected at a predetermined position within the supporting frame and formwork, and then column pedestal concrete is poured into the same formwork. This relates to the neck wrapping method.

(Function) and (Effects of the Invention) In the present invention, as described above, a column base supporting frame and formwork is used, the formwork is set at a predetermined position on the foundation footing, and a steel column is placed at a predetermined position within the formwork. After the construction of the steel columns, the concrete was poured, so the column formwork was set and the area around the columns was backfilled before the steel columns were erected. This provided good footing around the columns, allowing for easy work. can be carried out freely, and the number of man-hours required is greatly reduced.

In addition, by adopting the column base support frame and formwork, anchor bolts are no longer necessary, and the centering of the column is performed on the top surface of the column base support frame and formwork, which is almost on the ground surface, making it easier to achieve accuracy. Become.

(Example) The present invention will be described below with reference to the illustrated embodiments.

Reference numeral 1 denotes a rectangular cylindrical pillar support frame and formwork. After constructing the footing 2, marking is done on the footing 2, and anchor bolts 3 for the support frame and formwork are set and the footing 2 is placed on top of the footing 2. A mortar 4 is placed under the column pedestal base, and the column pedestal support frame and formwork 1 is set on the footing 2 via the anchor bolts 3, and then the footing 2 is backfilled.

In the figure, 5 is the backfill soil of the footing 2, and 6 is the pile head of the foundation pile.

Next, the steel column 7 is erected on the mortar 4 in the formwork 1, and the gazette plate 8 on the side of the steel column 7 is inserted into the temporary tightening bolt 9 inserted into the slot in the upper end flange of the formwork 1. Twist and temporarily tighten. At this time, a height adjusting liner is interposed between the gusset plate 8 and the upper end flange of the formwork 1.

After the erection adjustment of the steel column 7 is thus completed, the bolts 9 are finally tightened, and the column base concrete 10 is poured into the formwork 1 to complete the root wrapping construction of the steel column.

In the figure, reference numeral 11 indicates a kotsuta of the steel frame column 7, reference numeral 12 indicates a reinforcing bar for anchoring that is buried in the footing 2 and extends within the formwork 1, and reference numeral 13 indicates a hoop reinforcing bar surrounding the reinforcing bar 12.

Although the present invention has been described above with reference to embodiments, the present invention is, of course, not limited to such embodiments, and can be modified in various ways without departing from the spirit of the present invention. .

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view showing an embodiment of the method for wrapping the roots of a steel column leg according to the present invention, and FIG.
The plan view shown in the figure, and FIG. 3 is a perspective view of the main part thereof. 1... Column base support frame and formwork, 2... Footing, 7...
Steel column, 10...Column base concrete.

Claims (1)

[Claims] 1 After constructing the foundation footing, set the column base support frame/formwork at a predetermined position on the footing, backfill the footing, then erect the steel column at the predetermined position within the support frame/formwork. , a method for wrapping steel column bases, which is characterized by placing column base concrete within the same formwork.