JPH0610403U - Steel reinforced concrete column base structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a steel reinforced concrete column base structure that facilitates the built-in joining of steel columns to improve the workability and improves the joining accuracy and reliability. [Structure] R integrated into the outer periphery of the column base 1a of the steel column 1
It is characterized in that a C-shaped PC root winding 5 is provided and a plurality of connecting sleeves 6 that are connected to the protruding main bars 8 on the lower structure 15 are embedded in the lower end portion of the PC root winding 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a steel rebar concrete concrete column base structure having a PC connection structure of a column base in a steel frame column.

[0002]

[Prior art]

 Conventionally, as shown in FIG. 3, when joining a leg portion of a steel column, a base plate 12 is fixed to the lower end of the leg portion of the steel column (steel tube column) 11 in advance at a factory or the like, and the leg portion outer surface of the steel column 11 is fixed. A large number of stud bolts 13 are arranged, a plurality of column base main bars 16, hoops 17 and anchor bolts 18 are arranged and planted on the foundation 15, and the steel column 11 is built and set on the foundation 15, The base plate 12 is fixed by tightening and connecting it with anchor bolts 18 and nuts, and the hoop 17 is reinforced on the outer circumference of the leg of the steel frame column 11, and the root roll concrete is placed to increase the joint strength. It has a joint structure.

[0003]

[Problems to be solved by the device]

 In the conventional leg joint structure of steel column, as mentioned above, the base plate and many stud bolts are fixedly attached to the leg of the steel column, and a large number of column base main bars with hoops and anchor bolts are provided on the foundation. It has a joining mechanism.In addition, the built-in column bases are connected with stud bolts, hoops, etc. are reinforced, and a troublesome built-in joining process is performed by placing nembo concrete, resulting in a longer construction period. There are issues such as increased costs. In addition, there are problems in the accuracy of arrangement of the steel columns with respect to the main bar of the column base with hoops and the anchor bolts, and variations in the filling of concrete easily, and reliability.

The present invention has been developed to address the above-mentioned problems, and its purpose is to facilitate the built-in joining of steel columns to enhance the workability and to join them. It is to provide a steel reinforced concrete (SRC) column base structure with improved accuracy and reliability.

[0005]

[Means for Solving the Problems]

 The present invention provides an RC-made PC neck wrap integrated with the outer circumference of the column base of a steel column, and also connects a plurality of connecting main bars at the lower end of the PC neck wrap with projecting main bars on the lower structure. By embedding the sleeve, the built-in joining of steel columns is streamlined, labor-saving and easy, and the joining accuracy and reliability are improved.

[0006]

[Action]

 When a column base having an RC-made PC neck roll integrated on the outer periphery is built on the lower structure, the upper ends of the plurality of protruding main bars planted in the lower structure are the lower ends of the PC neck roll. Are inserted into a plurality of connecting sleeves embedded in the column and are arranged in a connecting shape on the column base main bars, and each connecting sleeve is filled with grout for easy, quick and accurate built-in joining, and The built-in joining of columns is rationalized, labor-saving and easily performed, and excellent joining accuracy and reliability are obtained.

[0007]

【Example】

 1 and 2 show an embodiment of the present invention. In the figure, 1a is a column base of a steel column 1, 3 is a column base main bar which is arranged on the outer periphery of the column base 1a at an appropriate interval, 4 is a hoop arranged on the leg main bar 3, and 5 is a hoop. RC PC neck roll integrated with the outer circumference of the column base 1a of the steel column 1, 6 is inserted into the lower ends of the plurality of column base main bars 3 and is embedded in the lower end of the PC neck roll 5. Connecting sleeves, 7a and 7b are inlets and outlets of the grout G connected to the connecting sleeve 6, and 8 is a connecting sleeve embedded in the lower structure (foundation, pillar, beam, etc.) 15. The projecting main bar, C is a root-wrapping concrete, and the steel reinforced concrete concrete column base structure of the present invention is manufactured in advance in a factory or a construction yard, and a plurality of columns are formed on the outer periphery of the column base 1a of the steel frame column 1. The leg main bars 3 and the hoops 4 are arranged, and the connecting sleeves 6 are inserted and arranged under the plurality of column base main bars 3 to form a neck roll concrete. The RC-made PC root winding 5 integrated with the outer circumference of the column base portion 1a of the steel pillar 1 is provided by mounting the toe C, and the protruding main bar on the lower structure 15 is provided at the lower end portion of the PC root winding 5. It has a structure in which a plurality of connecting sleeves 6 for connecting to 8 are buried.

The above-mentioned steel reinforced concrete column base structure is built on a plurality of projecting main bars 8 that are planted in the lower structure 15 as shown in FIG. 2, and the upper end of each projecting main bar 8 is As shown in FIG. 1, the connection sleeves 6 are embedded in the lower ends of the root windings 5, respectively, and are connected to the lower ends of the column base main bars 3 in a connecting manner. It is injected and filled into each connecting sleeve 5 through the inlet 7a and the outlet 7b, and is easily, quickly and accurately built and joined. It should be noted that the steel column 1 is welded to and connected to the column base 1a after the joining or before the joining. The SRC column base structure of the present invention is built on the lower structure 15, and is easily and accurately joined by a simple process of injecting and filling grout G into each connecting sleeve 5, and the built-in joining is performed. It is significantly rationalized and labor-saving, and since the PC base winding 5 is pre-attached to the outer periphery of the column base 1a to form a PC-type joint structure, the precision of the neck winding, the joint strength, its reliability, etc. Is significantly improved.

The present invention is applied to round steel pipes and steel columns of various types of steel in addition to the illustrated rectangular steel pipes, and the connecting sleeve is preferably a screw sleeve or a splice sleeve, and the protruding main bar on the lower structure side is applied. It is possible to apply deformed steel rods, anchor bolts, and the like.

[0010]

[Effect of device]

 The present invention is constructed as described above, and is used to build a column base portion having an RC-made PC neck roll integrated on the outer circumference, and each connection sleeve embedded in the lower end portion of the PC neck roll. It can be easily and quickly and accurately built-in and joined by grout filling, and the workability is improved by significantly streamlining the built-in construction and saving labor, and at the same time, the joining accuracy of the PC joint structure of the column base , Reliability has been improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view (A) of an XX portion and a horizontal sectional view (B) of an YY portion showing an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing a process of building and joining an SRC column base structure of the present invention.

FIG. 3 is a vertical cross-sectional view showing a conventional built-in joining structure of steel columns.

[Explanation of symbols]

 1 Steel Column 1a Column Base 5 PC Nemaki 6 Connecting Sleeve 8 Projecting Main Bar 15 Substructure (Foundation, Column, Beam, etc.)

Front page continued (72) Inventor Masami Ota 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo Taisei Construction Co., Ltd. (72) Inventor Yasuhiro Hayae 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo Taisei Construction Within the corporation

Claims (1)

[Scope of utility model registration request] 1. An R integrated with the outer circumference of a column base of a steel column
A steel reinforced concrete column base structure, characterized in that a C-shaped PC neck wrap is provided, and a plurality of connecting sleeves that connect to the protruding main bars on the lower structure are embedded in the lower end of the PC neck wrap.