Method for reinforcing section steel column base on structural column

Abstract

A method for reinforcing a section steel column base on a structural column is characterized by comprising the following steps of a, anchor rod plate fixing, b, column base plate positioning, c, grouting reinforcement, d, maintenance and subsequent concrete construction, and after grouting materials meet the design strength requirement, overall steel column concrete is poured. The reinforcing method for the section steel column base on the structural column has the advantages that the steel column concrete pouring construction is simple and convenient, the overall stress of the structure is ensured, the appearance quality and the structure safety are enhanced, and the hidden danger that the structure is stable possibly in the follow-up process is eliminated.

Description

Technical Field

[0001] The present invention belongs to the technical field of building construction and installation engineering. Specifically, it is a method for strengthening the steel column base on a structural column. Background Art

[0002] In general large-span structures such as large exhibition halls, a steel structure reticulated shell structure needs to be used as the upper structure of the building. Among them, the column bases of some steel columns need to use concrete structural columns as the column base pedestals. To ensure stability and provide sufficient support strength for the upper steel structure, the positioning and fixing requirements for the steel column bases are relatively high. Compared with using the ground or floor slab as the foundation, it is more difficult to fix the steel column base bolts with a structural column as the foundation. During the pouring of column concrete, it is easy to be disturbed, and the column base is more likely to be displaced, thus unable to ensure the overall stress condition of the final structure.

[0003] Therefore, the known fixing methods for steel column base bolts on structural columns have the above-mentioned various inconveniences and problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a safe and reliable method for strengthening the steel column base on a structural column.

[0005] To achieve the above purpose, the technical solution of the present invention is as follows: A method for strengthening the steel column base on a structural column, characterized by including the following steps: a. Fixing the anchor plate Before pouring the lower-layer concrete structural column, according to the design coordinates, measure and lay out the lines, pre-embed the anchor plate and the position of the anchor bolts, conduct preliminary positioning and fixing, and then pour the lower-layer column; the anchor bolts include bolt heads and screw rods used as anchor rods. The bolt heads are fixed by plug welding through perforations in the anchor plate, the screw rods are vertically arranged, and the top ends of the screw rods are locked with double nuts through nut pads and adjusting bolts above and below the column base plate. b. Positioning the column base plate Combined with the pre-embedded anchor plate of the lower-layer column, check and install the coordinates of the anchor bolts and the column base plate, and use the civil engineering structure steel bars to add three additional sets of closely spaced stirrups above and below the column base plate to assist in strengthening the column base plate. After completion, close the formwork and prepare for grouting. c. Grouting for strengthening After adjusting and confirming that the positioning is correct, carry out grouting and vibration of the concrete grouting material to complete the strengthening of the column base plate. d. Curing and subsequent concrete construction After the grouting material reaches the design strength requirement, then pour the concrete of the overall steel column.

[0006] The method for strengthening the steel column base on a structural column of the present invention can also be further implemented by adopting the following technical measures.

[0007] The foregoing method, wherein the concrete grouting material is self-leveling concrete grouting material.

[0008] The foregoing method, wherein the material specification of the anchor rod is M36, Q335B.

[0009] The foregoing method, wherein the stirrup is a steel bar with a diameter of 8 mm - 12 mm.

[0010] The foregoing method, wherein the concrete grouting material is C60 concrete grouting material for grouting.

[0011] After adopting the above technical solution, the method for strengthening the steel column base on the structural column of the present invention has the following advantages: 1. The construction of steel column concrete pouring is simple and convenient; 2. Ensure the overall force of the structure, and strengthen the appearance quality and structural safety; 3. Eliminate potential hidden dangers of structural stability that may exist subsequently. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the grouting practice of the column base plate in the embodiment of the present invention; Figure 2 It is a schematic diagram of the M36 column base anchor bolt structure in the embodiment of the present invention.

[0013] In the figure: 1 round head stud, 2 column longitudinal bars, 3 concrete grouting material, 4 column base plate, 5 anchor bolt, 6 anchor rod positioning plate, 7 double nuts, 8 nut backing plate, 9 structural column, 10 adjusting bolt, 11 perforated plug welding. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The following further describes the present invention in conjunction with the embodiments and their accompanying drawings.

[0015] Embodiment 1 The technological process of the method for strengthening the steel column base on the structural column of the present invention: Fixing the anchor rod plate (embedding the anchor rod and positioning plate before pouring the lower-layer concrete) → positioning the column base plate (positioning the steel column base plate and bolts, constructing synchronously with the civil engineering steel bars, using the round head stud 1 to set the formwork, and the structural column is provided with column longitudinal bars 2) → grouting and strengthening (self-leveling grouting material, and ensuring that the column base plate is not disturbed) → curing (the grouting reaches the design strength) → overall concrete pouring construction of the steel column.

[0016] Now please refer to Figure 1 and Figure 2 The method for strengthening the steel column base on the structural column of the present invention includes the following steps: a. Fixing the anchor rod plate Before pouring the lower-layer concrete structural column 9, according to the design coordinates, measure and set out the lines, pre-embed the anchor bolt positioning plate 6 and the position of the anchor bolts, conduct preliminary positioning and fixation, and then pour the lower-layer column; four anchor bolts 5 arranged in a cross shape are configured at each connection of the steel columns. The anchor bolt includes a bolt head and a screw rod serving as the anchor bolt 5. The bolt head is fixedly welded in the anchor bolt positioning plate through plug welding 11 of the perforation. The screw rod is vertically arranged. The top end of the screw rod is locked above and below the column base plate 4 with a double nut 7 through a nut backing plate 8 and an adjusting bolt 10. b. Positioning of the column base plate Combined with the pre-embedded anchor bolt positioning plate of the lower-layer column, conduct coordinate verification and installation of the anchor bolts and the column base plate. Use the civil engineering structure steel bars to add three additional layers of closely spaced stirrups above and below the column base plate to assist in strengthening the column base plate. After completion, seal the formwork and prepare for grouting; the material specification of the anchor bolt 5 is M36, Q335B. The stirrup is a steel bar with a diameter of 10 mm. The steel bars are arranged on each side above and below the column base plate with no less than 3 spans according to the original design stirrup size requirements of the structural column, and the spacing is 50 mm.

[0017] c. Grouting reinforcement After adjusting and confirming that the positioning is correct, conduct grouting and vibration of the concrete grouting material to complete the reinforcement of the column base plate; the concrete grouting material 3 is a self-leveling concrete grouting material. The concrete grouting material is a C60 concrete grouting material for grouting.

[0018] d. Curing and subsequent concrete construction After the grouting material reaches the design strength requirements, then pour the integral steel column concrete.

[0019] The present invention has substantial features and remarkable technical progress. The method for strengthening the steel column base on the structural column of the present invention solves the technical problem that the steel column base on the structural column is prone to disturbance during the pouring of the steel column concrete, reduces the fixing difficulty of the anchor bolts of the steel column base on the structural column, makes the pouring construction of the steel column concrete simple and convenient, effectively solves the rectification and rework affected by the disturbance of the column base plate during the construction process, effectively guarantees the overall force of the structure, enhances the appearance quality and structural safety, and eliminates potential hidden dangers of structural stability that may exist subsequently.

[0020] The method for strengthening the steel column base on the structural column of the present invention has been actually applied in the structural steel columns of the main entrance hall of the Guangzhou Convention and Exhibition Center project. It is simple in construction, easy to operate, firmly installed, has sufficient strength, stiffness and stability, good appearance quality, wide application range, easy to master and easy to promote and use. It has received unanimous recognition from the supervision unit and the construction unit, is welcomed by the operators, and has achieved good economic benefits and social impacts.

[0021] The above embodiments are only for illustrating the present invention and are not intended to limit the present invention. Those skilled in the relevant technical fields can also make various transformations or changes without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the scope of the present invention and should be defined by each claim.

Claims

1. A method for strengthening the steel column base on a structural column, characterized in that The steps include: a. Fixing the anchor bolt plate Before pouring the lower-layer concrete structural column (9), according to the design coordinates, measure and lay out the lines, embed the anchor bolt positioning plate (6) and the position of the anchor bolts, conduct preliminary positioning and fixing, and then pour the lower-layer column; the anchor bolts include bolt heads and screw rods used as anchor rods (5). The bolt heads are fixedly welded in the anchor bolt positioning plate by plug welding through holes (11). The screw rods are vertically arranged. The top ends of the screw rods are locked with double nuts (7) through nut backing plates (8) and adjusting bolts (10) above and below the column base plate (4); b. Positioning the column base plate Combined with the anchor bolt positioning plate (6) pre-embedded in the lower-layer column, check and install the coordinates of the anchor bolts and the column base plate (4). Use the civil engineering structure steel bars to add three additional layers of closely spaced stirrups above and below the column base plate to assist in strengthening the column base plate. After completion, close the formwork and prepare for grouting; c. Grouting and strengthening After adjusting and confirming that the positioning is correct, grout and vibrate the concrete grouting material to complete the strengthening of the column base plate; d. Curing and subsequent concrete construction After the grouting material reaches the design strength requirement, pour the overall steel column concrete.

2. The method for reinforcing the steel column base on the structural column as described in claim 1, characterized in that, The concrete grouting material is a self-leveling concrete grouting material.

3. The method for strengthening the steel column base on the structural column according to claim 1, characterized in that, The material specification of the anchor rod (5) is M36, Q335B.

4. The method for strengthening the steel column base on the structural column according to claim 1, characterized in that, The stirrups are steel bars with a diameter of 8 mm - 12 mm.

5. The method for strengthening the steel column base on the structural column as described in claim 1, characterized in that, The concrete grouting material is a C60 concrete grouting material for grouting.

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