JP2011069063A - Bowl base plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce costs and stabilize a construction period of steel-frame erection work, by omitting a cumbersome step of molding a reinforcing bar (3) with a length of the order of several tens of centimeters, among steps from work of backfill of foundation concrete (1) to steel structure material assembling work in construction work of a building and a structure of steel construction and steel framed reinforced concrete construction; and to accurately and easily perform operations of marking, the adjustment of a steel column (6), and the injection of a grout material (5) by surely transferring the load of the steel structure material to the foundation concrete (1). <P>SOLUTION: In the placing of the foundation concrete (1), when the leveling of the top surface of the concrete is checked, the steel column (6) equipped with a steel base plate (7) with a domy protrusion (8) is directly installed on the foundation concrete (1). More specifically, after the backfill of the foundation concrete (1), only the operations of the marking of a column core, a wall core, etc., and the re-checking of the level of the top surface of the foundation concrete (1) have only to be performed. Thus, the steps, which include the assembly of the steel structure material and which are not affected by weather, are scheduled; and the cost of the molding of the reinforcing bar (3) with the length of the order of several tens of centimeters becomes unnecessary. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a steel base plate bottom surface shape that is attached to the lower end of a column base of a steel structure material among steel works and steel reinforced concrete construction works and work works.

Conventionally, when building steel structure materials for building and work steel structures, after assembling reinforcing bars and formwork, installing anchor bolts, placing foundation concrete and solidifying each foundation A rebar of about several tens of centimeters (hereinafter referred to as a "manju-muscle") is inserted longitudinally to a depth of about three-quarters of it.
Then, after curing for about one week until the concrete strength reaches a value that can support the specified load, dismantle the foundation formwork and backfill, then post the column core on the upper surface of the foundation concrete and the base plate at the lower end Each of the reference lines is drawn (hereinafter referred to as sumi).
Furthermore, as shown in Fig. 1, after finishing for a few days after finishing a domed level mortar made of non-shrink mortar (hereinafter referred to as “Manju”) on the upper surface of the foundation concrete directly under each steel column, Stand a steel column with a steel base plate on the bun.
After temporarily tightening the base plate with the nut of the anchor bolt, assemble the steel structure material, adjust the position and inclination of the column, tighten the nut of the anchor bolt, and fill the gap between the foundation concrete and the column base plate with non-shrink mortar (Hereinafter referred to as grout material).

  For the work of installing the steamed bun, after marking the reference height of the steamed muscle inserted at the time of placing the concrete, the steamed muscle is cut to that height with a gas fusing machine, and the concrete surface of the installation part is cleaned to prevent peeling, This is a cumbersome operation of forming a non-shrink mortar and forming it into a dome shape of a predetermined height after inking the pillar core and the like.

Since manju is molded from on-site non-shrink mortar, the work is easily affected by the weather such as rain, and curing is inevitable because it may sink or break before solidification.

  The bun that conveys the steel column load to the basic concrete is molded with on-site non-shrink mortar, but its shape and strength are very unstable due to changes in the skill level of workers and changes in temperature.

  Ink soup has a bun and a bun in the center of the upper surface of the foundation concrete, so the inking line such as the pillar core, which is the standard for building, becomes discontinuous at the column base, and the pillars and anchors that are used as a reference Inaccurate bolt position measurement.

  Since the dome-shaped convex part of the bun is upward, the semi-liquefied grout material hardly flows in the vicinity of the central part of the bun, and the gap filling is not completely applied and a void is likely to be generated.

  The lower surface of the steel base plate attached to the lower end of the steel column base is formed into a shape having an integrated steel dome-shaped projection as shown in FIG.

When placing concrete foundations, it is possible to omit the process of inserting the buns and the complicated process of installing the buns on the upper surface of the foundation after backfilling.

  Since there are no obstacles such as buns or buns, the ink of the pillar core, which is the standard for the structure, can be accurately and without interruption, and the subsequent work is easy.

  Steel base plate bottom dome-shaped projection at the lower end of steel column base with fixed strength is in direct contact with the foundation concrete, so the load of the steel structure material is directly transmitted to the foundation concrete without going through the unstable strength of the buns and buns .

  The steel column tilt correction is different from the incomplete dome-shaped buns that are formed on-site, and because it is a complete dome shape made of steel, it can be finely adjusted with the center of the column as a fulcrum, and the unevenness adjustment of the steel column Even after the steel column has been erected, it is possible to loosen the nut without removing the steel column and to insert a small piece of steel plate between the foundation concrete and the dome shape of the base plate while jacking up the steel column.

  Since the dome shape of the base plate is downward when the grout material is injected, the semi-liquefied grouting material easily flows along the dome shape, and therefore the gap between the foundation concrete and the gap between the base plate and the grouting material is less likely to occur. .

The figure which looked at the finish of the upper surface of the conventional foundation from diagonally above. The figure which looked at the lower surface of the baseplate of this invention from diagonally downward. The horizontal sectional view of the conventional steel column installation with a baseplate. The vertical sectional view of the joined part of the conventional column base with a base plate, and a foundation. The horizontal sectional view of steel pillar installation with a baseplate of the present invention. The vertical sectional view of the joined part of the column base with a base plate and foundation of the present invention.

An embodiment of a rectangular base plate of the present invention will be described with reference to FIGS.
Instead of the buns on the upper surface of the foundation concrete to adjust the level and inclination of the steel column, steel dome-shaped projections that serve the same function are provided on the lower surface of the base plate.
For each dimension, molten iron is poured into a base plate mold provided with a continuous dome-shaped recess, removed after cooling, and cut into a predetermined dimension.

1 Foundation concrete
2 Anchor bolt
3 Manju
4 Manju muscle
5 Grout wood
6 Steel columns
7 Base plate
8 Dome-shaped protrusion

Claims (1)

A square and circular steel base plate with a steel dome-shaped projection integrated into the center of the bottom surface, which is attached to the lower end of the steel column base to attach the steel column base to the foundation concrete.

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