Simple and convenient construction method for internal stiffening of rectangular pipe

Abstract

The invention discloses a simple and convenient construction method for internal stiffening of a rectangular pipe, and belongs to the technical field of steel structure construction. The method comprises the following steps that 1, the position of a stiffening partition plate in the rectangular pipe is determined according to a construction drawing, and then a marking line is drawn on the corresponding portion of the outer wall of the rectangular pipe; 2, the rectangular pipe is cut according to the marking line through a semi-automatic cutting machine, and a web within the marking line range is taken out; 3, the stiffening partition plate is blanked according to the size of a construction drawing, and beveled edges are formed in the three faces of the stiffening partition plate; 4, assembling, welding and fixing the stiffening partition plates on the rectangular pipes; 5, grooves are formed in the four sides of the web plate taken out of the rectangular pipe; and 6, the web plate is subjected to recovery assembly welding on the rectangular pipe. The method is suitable for being used when stiffening partition plates are additionally arranged in the middle, away from the two ends, of the rectangular pipe, the technical problems of welding deformation, butt joint deviation and the like when the middle of the rectangular pipe is stiffened in a traditional method can be effectively solved, the linearity and welding quality of the rectangular pipe after the middle is stiffened can be ensured, and the construction quality and the construction efficiency are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of steel structure construction, and in particular relates to a simple construction method for reinforcing the interior of a rectangular tube. Background Art

[0002] Finished rectangular square steel tubes are widely used in building steel structures and are often used as components such as columns and beams. In order to meet the structural requirements of strong nodes, it is usually necessary to add stiffening partitions inside the tube to enhance the overall structural strength of the rectangular square steel tube.

[0003] The existing patent technology CN 113492272A discloses a method and equipment for making a box column, which introduces a method for stiffening a box column, but this method is only applicable to the case where the stiffening plate is located at the end of the pipe. When it is necessary to add a stiffening partition away from the end of the rectangular square steel pipe to enhance the overall structural strength of the rectangular square steel pipe, the traditional method is usually to cut the rectangular pipe into two parts, then stiffen it inside, and then butt the two parts of the rectangular pipe to form a whole after the stiffening is completed. The traditional construction method has many construction steps, and the measures taken to ensure the welding quality of the rectangular pipe after stiffening and prevent welding deformation are also very complicated; there is a butt deviation in the process of first cutting off the stiffening and then butting it into a whole, and the butt welding deformation will cause the center line of the rectangular pipe to shift. The construction process and measures will reduce the construction efficiency. This is bound to affect the overall construction efficiency of the steel structure.

[0004] Therefore, designing a simple construction method for internal reinforcement of rectangular tubes to improve the internal reinforcement construction efficiency of rectangular square steel tubes away from the two ends has become a technical problem that needs to be urgently solved by technicians in the relevant technical field. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a simple construction method for reinforcing the interior of a rectangular tube, so as to at least solve part of the above technical problems.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] A simple construction method for reinforcing the interior of a rectangular tube comprises the following steps:

[0008] Step 1: Determine the position of the stiffening partition inside the rectangular tube according to the construction drawing, and then draw a marking line on the corresponding position of the outer wall of the rectangular tube;

[0009] Step 2: Use a semi-automatic cutting machine to cut the rectangular tube according to the marked line and remove the web within the marked line range;

[0010] Step 3: Cut the stiffening partitions according to the dimensions of the construction drawings and make bevels on three sides;

[0011] Step 4: Assemble and weld the stiffening partition on the rectangular tube;

[0012] Step 5: Bevel the four sides of the web taken out from the rectangular tube;

[0013] Step 6: Restore and assemble the web on the rectangular tube and weld it.

[0014] Furthermore, in step 1, the position of the transverse marking line on the rectangular tube coincides with the center line of the thickness of its inner stiffening partition, and the longitudinal marking line is along the chamfered edge.

[0015] Furthermore, in step 2, the cut surface on the rectangular tube is flat and perpendicular to the outer wall of the rectangular tube, and the cut surface on the rectangular tube needs to be polished and the cutting burrs removed.

[0016] Furthermore, in step 3, the upper groove of the stiffening partition is a single V-shaped groove, and the groove angle is 40 degrees.

[0017] Furthermore, in step 4, before assembling the stiffening partition on the rectangular tube, a steel liner is provided along the inner wall of the rectangular tube in the longitudinal direction of the cutting area.

[0018] Furthermore, the steel liner and the inner wall of the rectangular tube need to be firmly fixed, and the thickness of the steel liner should not be less than 4 mm.

[0019] Furthermore, the rectangular tube cutting area laterally utilizes the thickness of the stiffening partition as a welding pad.

[0020] Furthermore, in step 4, when the stiffening partition is assembled on the rectangular tube, the un-grooved edge of the stiffening partition faces upward, and the grooved surface faces the cut surface of the rectangular tube. After the stiffening partition is welded and fixed, the weld needs to be inspected.

[0021] Furthermore, in step 5, the upper groove of the web is a single V-shaped groove, and the groove angle is 35 degrees.

[0022] Furthermore, in step 6, when the web is restored and welded, all four welds are first-level penetration welds. After welding, a nondestructive testing is performed. After passing the test, the welds are polished to make the welds smooth, without spatter, and the weld excess height is not greater than 2 mm.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The design of the present invention is scientific and reasonable, and can be used when a stiffening partition is added to the middle part of the rectangular tube away from its two ends. It can effectively reduce technical problems such as welding deformation and docking deviation when the middle part of the rectangular tube is stiffened in the traditional method, and can ensure the linearity and welding quality of the rectangular tube after the middle part is stiffened, and can effectively improve the construction quality and construction efficiency. At the same time, there are no welds on three sides when the middle part of the rectangular tube is stiffened, which can ensure that the rectangular tube is well welded with other beams and columns. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1The present invention is a schematic diagram of the process flow of the simple construction method for reinforcing the interior of a rectangular tube.

[0026] Figure 2 This is a schematic diagram of the stiffened partition plate (with grooves on three sides) of the present invention.

[0027] Figure 3 It is a schematic diagram of a web plate (with grooves on four sides) cut out of a rectangular tube of the present invention.

[0028] Figure 4 It is a schematic diagram of the rectangular tube after internal reinforcement according to the present invention. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] Example 1.

[0031] like Figure 1-Figure 4 As shown, the present invention provides a simple construction method for reinforcing the interior of a rectangular tube, comprising the following steps:

[0032] Step 1: Determine the position of the stiffening partition inside the rectangular tube according to the construction drawing, and then draw a marking line on the corresponding position of the outer wall of the rectangular tube;

[0033] Step 2: Use a semi-automatic cutting machine to cut the rectangular tube according to the marked line and remove the web within the marked line range;

[0034] Step 3: Cut the stiffening partitions according to the dimensions of the construction drawings and make bevels on three sides;

[0035] Step 4: Assemble and weld the stiffening partition on the rectangular tube;

[0036] Step 5: Bevel the four sides of the web taken out from the rectangular tube;

[0037] Step 6: Restore and assemble the web on the rectangular tube and weld it.

[0038] The design of the present invention is scientific and reasonable, and can be used when a stiffening partition is added to the middle part of the rectangular tube away from its two ends. It can effectively reduce technical problems such as welding deformation and docking deviation when the middle part of the rectangular tube is stiffened in the traditional method, and can ensure the linearity and welding quality of the rectangular tube after the middle part is stiffened, and can effectively improve the construction quality and construction efficiency. At the same time, there are no welds on three sides when the middle part of the rectangular tube is stiffened, which can ensure that the rectangular tube is well welded with other beams and columns.

[0039] Example 2.

[0040] like Figure 1-Figure 4 As shown, the present invention provides a simple construction method for reinforcing the interior of a rectangular tube, comprising the following steps:

[0041] Step 1: Determine the position of the stiffening partition inside the rectangular tube according to the construction drawing, and then draw a marking line on the corresponding position of the outer wall of the rectangular tube;

[0042] Step 2: Use a semi-automatic cutting machine to cut the rectangular tube according to the marked line and remove the web within the marked line range;

[0043] Step 3: Cut the stiffening partitions according to the dimensions of the construction drawings and make bevels on three sides;

[0044] Step 4: Assemble and weld the stiffening partition on the rectangular tube;

[0045] Step 5: Bevel the four sides of the web taken out from the rectangular tube;

[0046] Step 6: Restore and assemble the web on the rectangular tube and weld it.

[0047] In step 1, the position of the transverse marking line on the rectangular tube coincides with the center line of the thickness of the inner stiffening partition, and the longitudinal marking line is along the chamfered edge.

[0048] Based on Example 1, this Example 2 provides a more preferred method for the simple construction method of the internal reinforcement of the rectangular tube, specifically: in step 1, the position of the horizontal marking line on the rectangular tube coincides with the center line of the thickness of the internal reinforcement partition, and the vertical marking line is along the chamfered edge. Such a design can effectively reduce technical problems such as welding butt deviation when reinforcing the middle of the rectangular tube in the traditional method, and can effectively improve the construction quality and construction efficiency.

[0049] Example 3.

[0050] like Figure 1-Figure 4 As shown, the present invention provides a simple construction method for reinforcing the interior of a rectangular tube, comprising the following steps:

[0051] Step 1: Determine the position of the stiffening partition inside the rectangular tube according to the construction drawing, and then draw a marking line on the corresponding position of the outer wall of the rectangular tube;

[0052] Step 2: Use a semi-automatic cutting machine to cut the rectangular tube according to the marked line and remove the web within the marked line range;

[0053] Step 3: Cut the stiffening partitions according to the dimensions of the construction drawings and make bevels on three sides;

[0054] Step 4: Assemble and weld the stiffening partition on the rectangular tube;

[0055] Step 5: Bevel the four sides of the web taken out from the rectangular tube;

[0056] Step 6: Restore and assemble the web on the rectangular tube and weld it.

[0057] In step 2, the cutting surface on the rectangular tube is flat and perpendicular to the outer wall of the rectangular tube, and the cutting surface on the rectangular tube needs to be polished and the cutting burrs removed.

[0058] Based on Example 1, this Example 3 provides a more preferred method for the simple construction method of reinforcing the interior of the rectangular tube, specifically: in step 2, the cutting surface on the rectangular tube is flat and perpendicular to the outer wall of the rectangular tube, and the cutting surface on the rectangular tube needs to be polished and the cutting burrs removed. Such a design can ensure the linearity and welding quality of the rectangular tube after the middle part is reinforced, and can effectively improve the construction quality and construction efficiency.

[0059] Example 4.

[0060] like Figure 1-Figure 4 As shown, the present invention provides a simple construction method for reinforcing the interior of a rectangular tube, comprising the following steps:

[0061] Step 1: Determine the position of the stiffening partition inside the rectangular tube according to the construction drawing, and then draw a marking line on the corresponding position of the outer wall of the rectangular tube;

[0062] Step 2: Use a semi-automatic cutting machine to cut the rectangular tube according to the marked line and remove the web within the marked line range;

[0063] Step 3: Cut the stiffening partitions according to the dimensions of the construction drawings and make bevels on three sides;

[0064] Step 4: Assemble and weld the stiffening partition on the rectangular tube;

[0065] Step 5: Bevel the four sides of the web taken out from the rectangular tube;

[0066] Step 6: Restore and assemble the web on the rectangular tube and weld it.

[0067] In step 3, the upper groove of the stiffening partition is a single V-shaped groove, and the groove angle is 40 degrees.

[0068] Based on Example 1, this Example 3 provides a more preferred method for the simple construction method of reinforcing the interior of the rectangular tube, specifically: in step 3, the upper groove of the reinforcing partition is a single V-shaped groove, and the groove angle is 40 degrees. Such a design can effectively reduce technical problems such as welding deformation and docking deviation when reinforcing the middle part of the rectangular tube in the traditional method, and can ensure the linearity and welding quality of the rectangular tube after the middle part is reinforced.

[0069] Example 5.

[0070] like Figure 1-Figure 4As shown, the present invention provides a simple construction method for reinforcing the interior of a rectangular tube, comprising the following steps:

[0071] Step 1: Determine the position of the stiffening partition inside the rectangular tube according to the construction drawing, and then draw a marking line on the corresponding position of the outer wall of the rectangular tube;

[0072] Step 2: Use a semi-automatic cutting machine to cut the rectangular tube according to the marked line and remove the web within the marked line range;

[0073] Step 3: Cut the stiffening partitions according to the dimensions of the construction drawings and make bevels on three sides;

[0074] Step 4: Assemble and weld the stiffening partition on the rectangular tube;

[0075] Step 5: Bevel the four sides of the web taken out from the rectangular tube;

[0076] Step 6: Restore and assemble the web on the rectangular tube and weld it.

[0077] In step 4, before assembling the stiffening partition on the rectangular tube, a steel liner is arranged along the inner wall of the rectangular tube in the longitudinal direction of the cutting area.

[0078] Based on Example 1, this Example 5 provides a more preferred method for the simple construction method of reinforcing the interior of the rectangular tube, specifically: in step 4, before assembling the reinforcing partition on the rectangular tube, a steel liner is arranged along the inner wall of the rectangular tube in the longitudinal direction of the cutting area. Such a design can effectively reduce technical problems such as welding deformation and docking deviation when reinforcing the middle part of the rectangular tube in the traditional method, ensure the linearity and welding quality of the rectangular tube after the middle part is reinforced, and effectively improve the construction quality and efficiency.

[0079] Example 6.

[0080] like Figure 1-Figure 4 As shown, the present invention provides a simple construction method for reinforcing the interior of a rectangular tube, comprising the following steps:

[0081] Step 1: Determine the position of the stiffening partition inside the rectangular tube according to the construction drawing, and then draw a marking line on the corresponding position of the outer wall of the rectangular tube;

[0082] Step 2: Use a semi-automatic cutting machine to cut the rectangular tube according to the marked line and remove the web within the marked line range;

[0083] Step 3: Cut the stiffening partitions according to the dimensions of the construction drawings and make bevels on three sides;

[0084] Step 4: Assemble and weld the stiffening partition on the rectangular tube;

[0085] Step 5: Bevel the four sides of the web taken out from the rectangular tube;

[0086] Step 6: Restore and assemble the web on the rectangular tube and weld it.

[0087] In step 4, before assembling the stiffening partition on the rectangular tube, a steel liner is arranged along the inner wall of the rectangular tube in the longitudinal direction of the cutting area.

[0088] The steel liner and the inner wall of the rectangular tube must be firmly fixed, and the thickness of the steel liner must not be less than 4mm.

[0089] Based on Example 5, this Example 6 provides a more preferred method for the simple construction method of reinforcing the inner part of the rectangular tube, specifically: the steel liner and the inner wall of the rectangular tube must be firmly fixed, and the thickness of the steel liner is not less than 4mm. Such a design can effectively reduce technical problems such as welding deformation and docking deviation when reinforcing the middle part of the rectangular tube in the traditional method, ensure the linearity and welding quality of the rectangular tube after the middle part is reinforced, and effectively improve the construction quality and construction efficiency.

[0090] Example 7.

[0091] like Figure 1-Figure 4 As shown, the present invention provides a simple construction method for reinforcing the interior of a rectangular tube, comprising the following steps:

[0092] Step 1: Determine the position of the stiffening partition inside the rectangular tube according to the construction drawing, and then draw a marking line on the corresponding position of the outer wall of the rectangular tube;

[0093] Step 2: Use a semi-automatic cutting machine to cut the rectangular tube according to the marked line and remove the web within the marked line range;

[0094] Step 3: Cut the stiffening partitions according to the dimensions of the construction drawings and make bevels on three sides;

[0095] Step 4: Assemble and weld the stiffening partition on the rectangular tube;

[0096] Step 5: Bevel the four sides of the web taken out from the rectangular tube;

[0097] Step 6: Restore and assemble the web on the rectangular tube and weld it.

[0098] In step 4, before assembling the stiffening partition on the rectangular tube, a steel liner is arranged along the inner wall of the rectangular tube in the longitudinal direction of the cutting area.

[0099] The thickness of the stiffening diaphragm is used as welding pad in the transverse direction of the rectangular tube cutting area.

[0100] Based on Example 5, this Example 7 provides a more preferred method for the simple construction method of reinforcing the interior of the rectangular tube, specifically: the thickness of the reinforcing partition is used as a welding pad in the horizontal direction of the rectangular tube cutting area. Such a design can effectively reduce technical problems such as welding deformation and docking deviation when reinforcing the middle part of the rectangular tube in the traditional method, ensure the linearity and welding quality of the rectangular tube after the middle part is reinforced, and effectively improve the construction quality and construction efficiency.

[0101] Example 8.

[0102] like Figure 1-Figure 4 As shown, the present invention provides a simple construction method for reinforcing the interior of a rectangular tube, comprising the following steps:

[0103] Step 1: Determine the position of the stiffening partition inside the rectangular tube according to the construction drawing, and then draw a marking line on the corresponding position of the outer wall of the rectangular tube;

[0104] Step 2: Use a semi-automatic cutting machine to cut the rectangular tube according to the marked line and remove the web within the marked line range;

[0105] Step 3: Cut the stiffening partitions according to the dimensions of the construction drawings and make bevels on three sides;

[0106] Step 4: Assemble and weld the stiffening partition on the rectangular tube;

[0107] Step 5: Bevel the four sides of the web taken out from the rectangular tube;

[0108] Step 6: Restore and assemble the web on the rectangular tube and weld it.

[0109] In step 4, when the stiffening partition is assembled on the rectangular tube, the un-grooved edge of the stiffening partition faces upward, and the grooved surface faces the cut surface of the rectangular tube. After the stiffening partition is welded and fixed, the weld needs to be inspected.

[0110] Based on Example 1, this Example 8 provides a more preferred method for the simple construction method of reinforcing the inside of the rectangular tube, specifically: in step 4, when assembling the reinforcing partition on the rectangular tube, the ungrooved side of the reinforcing partition faces upward, and the grooved side faces the cutting surface on the rectangular tube, and the weld needs to be inspected after the reinforcing partition is welded and fixed. Such a design can effectively reduce technical problems such as welding deformation and docking deviation when reinforcing the middle of the rectangular tube in the traditional method, ensure the linearity and welding quality of the rectangular tube after the middle part is reinforced, and effectively improve the construction quality and construction efficiency. At the same time, there are no welds on three sides when the middle part of the rectangular tube is reinforced, which can ensure that the rectangular tube is well welded with other beams and columns.

[0111] Example 9.

[0112] like Figure 1-Figure 4 As shown, the present invention provides a simple construction method for reinforcing the interior of a rectangular tube, comprising the following steps:

[0113] Step 1: Determine the position of the stiffening partition inside the rectangular tube according to the construction drawing, and then draw a marking line on the corresponding position of the outer wall of the rectangular tube;

[0114] Step 2: Use a semi-automatic cutting machine to cut the rectangular tube according to the marked line and remove the web within the marked line range;

[0115] Step 3: Cut the stiffening partitions according to the dimensions of the construction drawings and make bevels on three sides;

[0116] Step 4: Assemble and weld the stiffening partition on the rectangular tube;

[0117] Step 5: Bevel the four sides of the web taken out from the rectangular tube;

[0118] Step 6: Restore and assemble the web on the rectangular tube and weld it.

[0119] In step 5, the upper groove of the web is a single V-shaped groove with a groove angle of 35 degrees.

[0120] Based on Example 1, this Example 9 provides a more preferred method for the simple construction method of reinforcing the interior of the rectangular tube, specifically: in step 5, the upper groove of the web is a single V-shaped groove, and the groove angle is 35 degrees. Such a design can ensure the linearity and welding quality of the rectangular tube after the middle part is reinforced, and can effectively improve the construction quality and construction efficiency. At the same time, there are no welds on three sides when the middle part of the rectangular tube is reinforced, which can ensure that the rectangular tube is well welded with other beams and columns.

[0121] Example 10.

[0122] like Figure 1-Figure 4 As shown, the present invention provides a simple construction method for reinforcing the interior of a rectangular tube, comprising the following steps:

[0123] Step 1: Determine the position of the stiffening partition inside the rectangular tube according to the construction drawing, and then draw a marking line on the corresponding position of the outer wall of the rectangular tube;

[0124] Step 2: Use a semi-automatic cutting machine to cut the rectangular tube according to the marked line and remove the web within the marked line range;

[0125] Step 3: Cut the stiffening partitions according to the dimensions of the construction drawings and make bevels on three sides;

[0126] Step 4: Assemble and weld the stiffening partition on the rectangular tube;

[0127] Step 5: Bevel the four sides of the web taken out from the rectangular tube;

[0128] Step 6: Restore and assemble the web on the rectangular tube and weld it.

[0129] In step 6, when the web is restored and welded, all four welds are first-level penetration welds. After welding, flaw detection is performed. After passing the test, the welds are polished to make the welds smooth, without spatter, and the weld excess height is not greater than 2 mm.

[0130] Based on Example 1, this Example 10 provides a more preferred method for the simple construction method of reinforcing the inside of the rectangular tube, specifically: in the step 6, when the web is restored and welded, the four welds are all first-level penetration welds, and flaw detection is performed after welding. After passing the test, the welds are polished to make the welds smooth, without spatter, and the weld excess height is not greater than 2mm. The design of the present invention is scientific and reasonable, and can be used when a reinforcing partition is added to the middle of the rectangular tube away from its two ends. It can effectively reduce technical problems such as welding deformation and docking deviation when reinforcing the middle of the rectangular tube like the traditional method, and can ensure the linearity and welding quality of the rectangular tube after the middle is reinforced, and can effectively improve the construction quality and construction efficiency. At the same time, there are no welds on three sides when the middle of the rectangular tube is reinforced, which can ensure that the rectangular tube is well welded with other beams and columns.

[0131] like Figure 1-Figure 4 As shown, the present invention provides a simple construction method for reinforcing the interior of a rectangular tube, comprising the following steps:

[0132] 1. Determine the position of the internal stiffening partition according to the construction drawing, and then mark the outside of the rectangular tube. The horizontal marking line of the rectangular tube is required to coincide with the center line of the thickness of the stiffening partition, and the vertical marking line is along the chamfered edge. The marking line is the cutting center line in the next process.

[0133] 2. Use a semi-automatic cutting machine to cut according to the cutting marking lines in the first step, and remove the web within the marking line range. The cutting surface must be flat and vertical.

[0134] 3. Grind the cut section to remove cutting burrs, etc.

[0135] 4. Cut the stiffening partitions according to the dimensions on the drawing (or the inner wall dimensions of the rectangular tube) and make bevels. The bevels are only made on three sides. The form and angle of the bevels are determined according to the thickness of the stiffening plate and the construction requirements of the drawings. It is preferred to use a single V-shaped bevel with a bevel angle of 40 degrees.

[0136] 5. Assemble and fix the stiffening partitions. When installing the stiffening plates, the un-beveled edge should face upward and toward the opening surface, and the beveled surface should face the cutting surface to facilitate the welding of the partitions.

[0137] 6. Weld the stiffening partitions and inspect the welds. Proceed to the next process after passing the inspection.

[0138] 7. Steel pads are set along the inner edge in the longitudinal direction of the rectangular tube cutting area to ensure full penetration welding during web restoration welding; the steel pads are required to be firmly fixed and the pad thickness is not less than 4mm. The thickness of the stiffening partition is used as a welding pad in the transverse direction of the cutting area.

[0139] 8. The web of the rectangular tube removed by cutting is beveled, and bevels are required to be made on all four sides. The bevel form and angle are determined according to the thickness of the web of the rectangular tube. Because there will be about 2mm cutting loss when the web is initially cut out, the four-sided bevel of the web usually adopts a single V-shaped bevel with a bevel angle of 35 degrees.

[0140] 9. Perform restoration welding on the web, requiring all four welds to be first-level penetration welds, and conduct nondestructive testing. After passing the test, the welds are polished, requiring the welds to be smooth and free of spatter, and the weld excess height shall not be greater than 2mm.

[0141] The design of the present invention is scientific and reasonable, and can be used when a stiffening partition is added to the middle part of the rectangular tube away from its two ends. It can effectively reduce technical problems such as welding deformation and docking deviation when the middle part of the rectangular tube is stiffened in the traditional method, and can ensure the linearity and welding quality of the rectangular tube after the middle part is stiffened, and can effectively improve the construction quality and construction efficiency. At the same time, there are no welds on three sides when the middle part of the rectangular tube is stiffened, which can ensure that the rectangular tube is well welded with other beams and columns.

[0142] Finally, it should be noted that the above embodiments are only preferred embodiments of the present invention to illustrate the technical solution of the present invention, but not to limit it, and certainly not to limit the patent scope of the present invention. Any changes or modifications that have no substantial significance on the main design concept and spirit of the present invention, which solve technical problems consistent with the present invention, should be included in the protection scope of the present invention; in addition, the direct or indirect application of the technical solution of the present invention in other related technical fields should also be included in the patent protection scope of the present invention.

Claims

1. A simple construction method for internal reinforcement of a rectangular tube, characterized in that: The following steps are involved: Step 1: Determine the position of the stiffening partition inside the rectangular tube according to the construction drawing, and then draw a marking line on the corresponding position of the outer wall of the rectangular tube; Step 2: Use a semi-automatic cutting machine to cut the rectangular tube according to the marked line and remove the web within the marked line range; Step 3: Cut the stiffening partitions according to the dimensions of the construction drawings and make bevels on three sides; Step 4: Assemble and weld the stiffening partition on the rectangular tube; Step 5: Bevel the four sides of the web taken out from the rectangular tube; Step 6: Restore and assemble the web on the rectangular tube and weld it.

2. A simple construction method for reinforcing the interior of a rectangular tube according to claim 1, characterized in that: In step 1, the position of the transverse marking line on the rectangular tube coincides with the center line of the thickness of the inner stiffening partition, and the longitudinal marking line is along the chamfered edge.

3. A simple construction method for reinforcing the interior of a rectangular tube according to claim 1, characterized in that: In step 2, the cutting surface on the rectangular tube is flat and perpendicular to the outer wall of the rectangular tube, and the cutting surface on the rectangular tube needs to be polished and the cutting burrs removed.

4. A simple construction method for reinforcing the interior of a rectangular tube according to claim 1, characterized in that: In step 3, the upper groove of the stiffening partition is a single V-shaped groove, and the groove angle is 40 degrees.

5. A simple construction method for reinforcing the interior of a rectangular tube according to claim 1, characterized in that: In step 4, before assembling the stiffening partition on the rectangular tube, a steel liner is arranged along the inner wall of the rectangular tube in the longitudinal direction of the cutting area.

6. A simple construction method for reinforcing the interior of a rectangular tube according to claim 5, characterized in that: The steel liner and the inner wall of the rectangular tube must be firmly fixed, and the thickness of the steel liner must not be less than 4mm.

7. A simple construction method for reinforcing the interior of a rectangular tube according to claim 5, characterized in that: The thickness of the stiffening diaphragm is used as welding pad in the transverse direction of the rectangular tube cutting area.

8. A simple construction method for reinforcing the interior of a rectangular tube according to claim 1, characterized in that: In step 4, when the stiffening partition is assembled on the rectangular tube, the un-grooved edge of the stiffening partition faces upward, and the grooved surface faces the cut surface of the rectangular tube. After the stiffening partition is welded and fixed, the weld needs to be inspected.

9. A simple construction method for reinforcing the interior of a rectangular tube according to claim 1, characterized in that: In step 5, the upper groove of the web is a single V-shaped groove with a groove angle of 35 degrees.

10. A simple construction method for reinforcing the interior of a rectangular tube according to claim 1, characterized in that: In step 6, when the web is restored and welded, all four welds are first-level penetration welds. After welding, flaw detection is performed. After passing the test, the welds are polished to make the welds smooth, without spatter, and the weld excess height is not greater than 2 mm.

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