Steel bar truss for reinforced concrete and construction method thereof

Abstract

The invention belongs to the technical field of building structures, and particularly relates to a steel bar truss for reinforced concrete and a construction method thereof.The steel bar truss comprises an upper chord steel bar and two lower chord steel bars, web member steel bars are welded to the side walls of the two lower chord steel bars, and the section of each web member steel bar is of a V-shaped structure; and the upper ends of the two web member steel bars are welded with the upper chord steel bar. The split type aluminum sheet plates can be transported to a construction site to be spliced with the steel bar truss to complete assembly, the assembly efficiency is high, the supporting strength is large, the size of the split type aluminum sheet plates is shorter than that of the whole aluminum sheet plate, the transportation difficulty and cost are reduced, and when the two split type aluminum sheet plates are welded, the welding efficiency is greatly improved. The welding seams can be in close contact, and defects such as air holes and slag inclusion in the welding seams can be reduced, so that the welding seams are more compact and uniform, and the quality and the appearance of the welding seams are improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of building structures, and in particular relates to a steel bar truss for reinforced concrete and a construction method thereof. BACKGROUND

[0002] In various buildings such as high-rise buildings, industrial plants, commercial buildings, etc., a steel bar truss floor support plate is often used as a floor structure. This floor support plate combines a steel bar truss and a profiled steel plate together, which not only utilizes the formwork function of the profiled steel plate, but also plays the structural performance of the steel bar truss, so as to effectively improve the construction speed and quality of the floor. After the steel bar truss is pre-fabricated in a factory, it is transported to the construction site for installation, which can greatly reduce the workload of on-site steel binding and formwork setting, improve the construction efficiency, and shorten the construction period. For example, the steel bar truss disclosed in Patent No. CN206256587U.

[0003] At present, the steel bar truss needs to be used in combination with an aluminum sheet plate in actual application. The traditional aluminum sheet plate is matched with the steel bar truss, and the length of the aluminum sheet plate must be consistent with that of the steel bar truss. This results in that part of the aluminum sheet plate is as long as several meters. In this way, in the transportation process, not only a large amount of space is occupied, but also many inconveniences are faced, which greatly increases the transportation difficulty and cost.

[0004] Therefore, the steel bar truss for reinforced concrete and the construction method thereof are proposed to solve the above problems. SUMMARY

[0005] The purpose of the present application is to provide a steel bar truss for reinforced concrete and a construction method thereof to solve the above problems.

[0006] To achieve the above purpose, the following technical scheme is adopted: a steel bar truss for reinforced concrete, comprising one upper chord steel bar and two lower chord steel bars, the side walls of the two lower chord steel bars are each welded with a web steel bar, the cross section of the web steel bar is a V-shaped structure, the upper ends of the two web steel bars are each welded with the upper chord steel bar, and further comprising:

[0007] a plurality of split aluminum sheet plates, the side walls of the split aluminum sheet plates are provided with a plurality of cutouts matched with the web steel bars, two split aluminum sheet plates located on the same side pass through the web steel bars and are welded together;

[0008] a plurality of positioning assemblies arranged at the interfaces of the plurality of split aluminum sheet plates, so that the interfaces of the split aluminum sheet plates are aligned during welding;

[0009] a plurality of tensioning assemblies evenly distributed on the side walls of the plurality of split aluminum sheet plates, so that the two split aluminum sheet plates are in close contact during welding.

[0010] Preferably, the positioning assembly comprises a positioning frame, the positioning frame is in U-shaped structure, a threaded cylinder is fixedly connected to the upper side wall of the positioning frame, the threaded cylinder is in communication with the upper side wall of the positioning frame, a threaded rod is threadedly connected in the threaded cylinder, the upper end of the threaded rod is fixedly connected with a rotating plate, the lower end of the threaded rod extends out of the threaded cylinder and is rotatably connected with a pressing plate, and the interfaces of the two split aluminum sheet plates are located between the pressing plate and the lower side inner wall of the positioning frame.

[0011] Preferably, the lower side wall of the pressing plate is fixedly connected with a rubber pad, and the lower side wall of the rubber pad is in contact with the upper side inner wall of the two split aluminum sheet plates.

[0012] Preferably, the tensioning assembly comprises a tensioning cylinder and a rope cylinder, the rope cylinder is rotatably connected to the inner wall of the tensioning cylinder, a pulling rope is wound around the outer side of the rope cylinder, the right end of the pulling rope is fixedly connected with the side wall of the rope cylinder, a rope hole is formed in the left side wall of the tensioning cylinder, the left end of the pulling rope passes through the rope hole and is fixedly connected with a tensioning block, the tensioning block and the lower side wall of the rope cylinder are both fixedly connected with a locking pin, a plurality of locking holes matched with the locking pin are formed in the side wall of the split aluminum sheet plate, the upper side wall of the tensioning cylinder is fixedly connected with a limiting cover, an insertion hole is formed in the upper side wall of the limiting cover, a rotating rod is inserted into the insertion hole, the lower end of the rotating rod is located in the limiting cover and is fixedly connected with a circular plate, two positioning pins are fixedly connected with the upper side wall of the circular plate, a plurality of positioning grooves matched with the positioning pins are formed in the inner wall of the limiting cover, two sliding holes are formed in the side wall of the circular plate and are inserted with sliding pins, the lower ends of the two sliding pins are fixedly connected with a same fixing plate, and the fixing plate is connected with the rope cylinder through a tension force assembly.

[0013] Preferably, the tension force assembly comprises a tension force cylinder, the upper side shaft end of the rope cylinder extends out of the tensioning cylinder and is fixedly connected with the lower side wall of the tension force cylinder, the lower side wall of the fixing plate is fixedly connected with a cylinder, the lower end of the cylinder is rotatably connected with the lower side inner wall of the tension force cylinder, the rod walls on the left and right sides of the cylinder are both fixedly connected with a pushing plate, the inner walls on the front and back sides of the tension force cylinder are both fixedly connected with a pushing plate, a same spring is fixedly connected between the pushing plate and the pushing plate on the same side, the right side wall of the pushing plate on the right side is fixedly connected with a conductive block, the lower side inner wall of the tensioning cylinder is fixedly connected with a micro power supply, the micro power supply is electrically connected with the conductive block, the inner wall of the tension force cylinder is inlaid with an arc-shaped conductive plate, the right side outer wall of the tensioning cylinder is fixedly connected with a prompt lamp, and the arc-shaped conductive plate is electrically connected with the prompt lamp.

[0014] Preferably, the upper end of the rotating rod is fixedly connected with a friction disc, and the outer wall of the friction disc is provided with friction lines.

[0015] Preferably, the material of the pulling rope is stainless steel, and the diameter of the pulling rope is 0.5 mm.

[0016] A construction method of a steel bar truss for reinforced concrete, comprising the following steps:

[0017] S1, using a welding device, welding an upper chord steel bar, two lower chord steel bars and two web steel bars together, and during the welding process, the protrusions and recesses of the two web steel bars are in the same straight line;

[0018] S2, using a cutting device to cut the split aluminum sheet plate, so that the cut of the split aluminum sheet plate corresponds to the welding of the web steel bar and the upper chord steel bar;

[0019] S3, inserting two cut split aluminum sheet plates between the welded upper chord steel bar, two lower chord steel bars and two web steel bars, and aligning the cut of the split aluminum sheet plate with the welding of the web steel bar and the upper chord steel bar;

[0020] S4, using a plurality of positioning assemblies to fix the two split aluminum sheet plates, and then inserting a plurality of tensioning assemblies into the locking holes on the surfaces of the two split aluminum sheet plates to fix the positions of the two split aluminum sheet plates;

[0021] S5, using a welding device to weld the two split aluminum sheet plates, and during the welding process, the positioning assemblies and tensioning assemblies at the welding are removed, and after the welding of the two split aluminum sheet plates is completed, the above steps are repeated to weld another two split aluminum sheet plates, and the two split aluminum sheet plates are welded together with the previous two split aluminum sheet plates.

[0022] Compared with the prior art, the steel bar truss for reinforced concrete and the construction method thereof have the advantages that:

[0023] 1. By arranging the upper chord steel bar, the lower chord steel bar, the web steel bar, the split aluminum sheet plate and the cut, when assembling the steel bar truss, the split aluminum sheet plate can be transported to the construction site and spliced with the steel bar truss to complete the assembly, and the assembly efficiency is high, the supporting strength is large, and the split aluminum sheet plate has a shorter size than the whole aluminum sheet plate, reducing the transportation difficulty and cost.

[0024] 2. By arranging the positioning assembly, when welding the two split aluminum sheet plates, the contact parts of the two split aluminum sheet plates can be aligned, thereby improving the welding flatness of the two split aluminum sheet plates and ensuring the strength of the subsequent split aluminum sheet plate.

[0025] 3. By arranging the tensioning assembly, when welding the two split aluminum sheet plates, the welding seams can be in close contact, which helps to reduce defects such as pores and slag in the welding seams, so that the welding seams are more dense and uniform, and the quality and appearance of the welding seams are improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structural schematic diagram of a steel bar truss for reinforced concrete and a construction method thereof provided by the present application;

[0027] Figure 2 is a schematic diagram of a fixing mode of two split aluminum sheet plates in a steel bar truss for reinforced concrete and a construction method thereof provided by the present application;

[0028] Figure 3 is a structural schematic diagram of a positioning assembly in a steel bar truss for reinforced concrete and a construction method thereof provided by the present application;

[0029] Figure 4 is a schematic diagram of a position relationship between a tensioning cylinder and a tensioning block in a steel bar truss for reinforced concrete and a construction method thereof provided by the present application;

[0030] Figure 5 is a structural schematic diagram of a tensioning assembly in a steel bar truss for reinforced concrete and a construction method thereof provided by the present application;

[0031] Figure 6 is a structural schematic diagram of a tension assembly in a steel bar truss for reinforced concrete and a construction method thereof provided by the present application.

[0032] In the figure: 1 upper chord steel bar, 2 lower chord steel bar, 3 web steel bar, 4 split aluminum sheet plate, 5 notch, 6 positioning assembly, 61 positioning frame, 62 threaded cylinder, 7 threaded rod, 8 rotating plate, 9 pressing plate, 10 rubber pad, 11 tensioning assembly, 111 tensioning cylinder, 112 rope cylinder, 12 inhaul cable, 13 tensioning block, 14 locking pin, 15 locking hole, 16 limiting cover, 17 rotating rod, 18 round plate, 19 positioning pin, 20 sliding pin, 21 fixed plate, 22 tension assembly, 221 tension cylinder, 222 cylinder, 23 extrusion plate, 24 pushing plate, 25 conductive block, 26 micro power supply, 27 arc-shaped conductive plate, 28 prompt light, 29 friction disc. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application.

[0034] As shown in Figures 1-6 a steel bar truss for reinforced concrete, comprising one upper chord steel bar 1 and two lower chord steel bars 2, the side walls of the two lower chord steel bars 2 are each welded with a web steel bar 3, the cross section of the web steel bar 3 is V-shaped structure, the upper ends of the two web steel bars 3 are each welded with the upper chord steel bar 1, and further comprising:

[0035] A plurality of split aluminum sheet 4, split aluminum sheet 4 side wall is provided with a plurality of and web steel bar 3 matching the cutout 5, located in the same side two split aluminum sheet 4 through the web steel bar 3, and welded together;

[0036] A plurality of positioning assembly 6, set in the interface of a plurality of split aluminum sheet 4, make split aluminum sheet 4 in the welding process, interface alignment, positioning assembly 6 includes positioning frame 61, positioning frame 61 for U type structure, the upper side wall of positioning frame 61 is fixedly connected with the threaded cylinder 62, threaded cylinder 62 and the upper side wall of positioning frame 61 communication, threaded cylinder 62 is screwed with threaded rod 7, the upper end of threaded rod 7 is fixedly connected with the rotating plate 8, the lower end of threaded rod 7 is out of threaded cylinder 62, and rotatingly connected with the pressing plate 9, the interface of two split aluminum sheet 4 is located between the pressing plate 9 and the lower side wall of positioning frame 61, in the welding of two split aluminum sheet 4, can make the contact of two split aluminum sheet 4 alignment, thereby improving the welding flatness of two split aluminum sheet 4, ensure the strength of subsequent split aluminum sheet 4 use;

[0037] A plurality of tension assembly 11, are distributed in the side wall of a plurality of split aluminum sheet 4, so that two split aluminum sheet 4 in welding, close contact, tension assembly 11 includes tension cylinder 111 and rope cylinder 112, rope cylinder 112 is rotatably connected to the inner wall of tension cylinder 111, the outer side of rope cylinder 112 is wound with cable 12, the material of cable 12 is stainless steel, and the diameter of cable 12 is 0.5mm, ensure the strength of cable 12, the right end of cable 12 is fixedly connected with the side wall of rope cylinder 112, the left side wall of tension cylinder 111 is provided with a rope hole, the left end of cable 12 passes through the rope hole, and is fixedly connected with the tension block 13, the lower side wall of tension block 13 and rope cylinder 112 is fixedly connected with locking pin 14, the side wall of split aluminum sheet 4 is provided with a plurality of locking hole 15 matched with locking pin 14, the upper side wall of tension cylinder 111 is fixedly connected with limiting cover 16, the upper side wall of limiting cover 16 is provided with a insertion hole, and the insertion hole is inserted with rotating rod 17, the upper end of rotating rod 17 is fixedly connected with friction disc 29, the outer wall of friction disc 29 is provided with friction lines, the lower end of rotating rod 17 is located in limiting cover 16, and is fixedly connected with circular plate 18, the upper side wall of circular plate 18 is fixedly connected with two positioning pins 19, the inner wall of limiting cover 16 is provided with a plurality of positioning groove matched with positioning pin 19, the side wall of circular plate 18 is provided with two sliding holes, and the sliding hole is inserted with sliding pin 20, the lower end of two sliding pins 20 is fixedly connected with the same fixed plate 21, the fixed plate 21 is connected with rope cylinder 112 through tension assembly 22, in the welding of two split aluminum sheet 4, can make the weld between the close contact, help to reduce the porosity, slag inclusion and other defects in the weld, so that the weld is more dense, uniform, improve the quality and appearance of the weld.

[0038] The lower side wall of the pressing plate 9 is fixedly connected with a rubber pad 10, the lower side wall of the rubber pad 10 is in contact with the upper side inner wall of the two split aluminum sheet plates 4, and the friction between the pressing plate 9 and the split aluminum sheet plate 4 can be improved.

[0039] The tension assembly 22 comprises a tension cylinder 221, the upper side shaft end of the rope cylinder 112 extends out of the tension cylinder 111 and is fixedly connected with the lower side wall of the tension cylinder 221, the lower side wall of the fixed plate 21 is fixedly connected with a cylinder 222, the lower end of the cylinder 222 is rotatably connected with the lower side inner wall of the tension cylinder 221, the rod walls on the left and right sides of the cylinder 222 are fixedly connected with extrusion plates 23, the front and rear inner walls of the tension cylinder 221 are fixedly connected with jacks 24, the same spring is fixedly connected between the extrusion plate 23 and the jack 24 on the same side, the right side wall of the extrusion plate 23 on the right side is fixedly connected with a conductive block 25, the lower side inner wall of the tension cylinder 111 is fixedly connected with a micro power supply 26, the micro power supply 26 is electrically connected with the conductive block 25, the inner wall of the tension cylinder 221 is inlaid with an arc-shaped conductive plate 27, the right side outer wall of the tension cylinder 111 is fixedly connected with a prompt lamp 28, the arc-shaped conductive plate 27 is electrically connected with the prompt lamp 28, and the contact force between the two split aluminum sheet plates 4 can be detected.

[0040] The operation principle of the present application is described as follows: the upper chord steel bar 1, the two lower chord steel bars 2 and the two web steel bars 3 are welded together by using a welding device, and in the welding process, the protrusions and the recesses of the two web steel bars 3 are on the same straight line, the split aluminum sheet plate 4 is cut by using a cutting device, the cutout 5 of the split aluminum sheet plate 4 corresponds to the welding position of the web steel bar 3 and the upper chord steel bar 1, the two cut split aluminum sheet plates 4 are inserted between the welded upper chord steel bar 1, the two lower chord steel bars 2 and the two web steel bars 3, and the cutout 5 of the split aluminum sheet plate 4 is aligned with the welding position of the web steel bar 3 and the upper chord steel bar 1, then the operator takes the appropriate positioning assembly 6, aligns the two split aluminum sheet plates 4, and places the positioning frame 61 on the outer side of the two split aluminum sheet plates 4, then the operator rotates the rotating plate 8, drives the threaded rod 7 to rotate by using the rotating plate 8, and through the threaded cooperation between the threaded rod 7 and the threaded cylinder 62, the threaded rod 7 drives the pressing plate 9 to move downward (the threaded rod 7 and the pressing plate 9 are rotatably connected), the pressing plate 9 extrudes the two split aluminum sheet plates 4, and when the operator feels that the rotating plate 8 in the hand is resisted, the rotation can be paused;

[0041] Then, the operator takes a plurality of tensioning assemblies 11, and inserts the locking pin 14 at the lower side of the tensioning block 13 and the tensioning cylinder 111 into the locking hole 15 on the surface of the two split aluminum sheet plates 4. Then, the operator presses the friction disc 29 downward, so that the friction disc 29 drives the circular plate 18 and the positioning pin 19 to move downward, and the positioning pin 19 is separated from the positioning slot on the inner wall of the limiting cover 16. Then, the operator rotates the friction disc 29, and the friction disc 29 drives the circular plate 18 to rotate through the rotating rod 17. The circular plate 18 drives the sliding pin 20, the fixed plate 21, and the cylinder 222 to rotate. The cylinder 222 drives the two side extrusion plates 23 to rotate. The extrusion plates 23 extrude the springs, and the springs extrude the push plates 24 through the elastic force. The push plates 24 drive the tensioning cylinder 221 and the rope cylinder 112 to rotate. The rope cylinder 112 tightens the cable 12. The cable 12 pulls the tensioning block 13. The tensioning block 13 is close to the two split aluminum sheet plates 4 through the cooperation of the locking pin 14 and the locking hole 15 (the friction fit between the locking pin 14 and the locking hole 15, and the length of the locking pin 14 is greater than the length of the locking hole 15, which can avoid the locking pin 14 from being separated from the locking hole 15 when the tensioning block 13 is pulled horizontally). When the two split aluminum sheet plates 4 are in close contact, the two split aluminum sheet plates 4 stop moving, while the cylinder 222 still drives the extrusion plate 23 to rotate under the rotation of the operator. The extrusion plate 23 drives the conductive block 25 to rotate. The conductive block 25 continues to rotate and contacts the arc-shaped conductive plate 27. The conductive block 25 is electrically connected with the micro power supply 26, and the arc-shaped conductive plate 27 is electrically connected with the indicator light 28. When the two are in contact, the current in the micro power supply 26 is transmitted to the indicator light 28, so that the indicator light 28 emits light. After the operator sees the indicator light 28 emitting light, the operator needs to pull the friction disc 29 upward, and rotate the friction disc 29 left and right reciprocatingly during the process of pulling the friction disc 29. The friction disc 29 drives the circular plate 18 and the positioning pin 19 to rotate through the rotating rod 17. The positioning pin 19 is accurately inserted into the positioning slot in the limiting cover 16, so that the tensioning assembly 11 is in a locked state. The reverse operation can remove the tensioning assembly 11 from the split aluminum sheet plate 4. When all the tensioning assemblies 11 are locked, the operator can use the welding equipment to weld the welds. When the welding equipment approaches the tensioning assembly 11 or the positioning assembly 6, the tensioning assembly 11 or the positioning assembly 6 at the position needs to be removed. The tensioning assembly 11 or the positioning assembly 6 at other positions can still make the split aluminum sheet plates 4 in close contact, so as to improve the welding flatness of the two split aluminum sheet plates 4, ensure the strength of the subsequent split aluminum sheet plates 4, and make the welds in close contact, which helps to reduce defects such as pores and slag in the welds, so as to make the welds more dense and uniform, improve the quality and appearance of the welds.

[0042] The above merely describes preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A steel bar truss for reinforced concrete, comprising an upper chord steel bar (1) and two lower chord steel bars (2), the side walls of both of the lower chord steel bars (2) being welded with web steel bars (3), the cross section of the web steel bars (3) being V-shaped, the upper ends of both of the web steel bars (3) being welded with the upper chord steel bar (1), characterized in that, Also include: A plurality of split aluminum sheet plate (4), the side wall of the split aluminum sheet plate (4) is provided with a plurality of and web steel bar (3) matching cutout (5), located in the same side two split aluminum sheet plate (4) through web steel bar (3), and welded together; A plurality of positioning components (6) are arranged at the interfaces of the plurality of split aluminum sheet plate (4), so that the interfaces of the split aluminum sheet plate (4) are aligned during welding; A plurality of tensioning components (11) are uniformly distributed on the side wall of the plurality of split aluminum sheet plate (4), so that the two split aluminum sheet plate (4) are in close contact during welding.

2. A steel truss for reinforced concrete according to claim 1, characterized by The positioning component (6) comprises a positioning frame (61), the positioning frame (61) is a U-shaped structure, the upper side wall of the positioning frame (61) is fixedly connected with a threaded cylinder (62), the threaded cylinder (62) is communicated with the upper side wall of the positioning frame (61), the threaded cylinder (62) is screwed with a threaded rod (7), the upper end of the threaded rod (7) is fixedly connected with a rotating plate (8), the lower end of the threaded rod (7) extends out of the threaded cylinder (62), and is rotatably connected with a pressing plate (9), the interfaces of the two split aluminum sheet plate (4) are located between the pressing plate (9) and the lower side inner wall of the positioning frame (61).

3. A steel bar truss for reinforced concrete according to claim 2, characterized by The lower side wall of the pressing plate (9) is fixedly connected with a rubber pad (10), and the lower side wall of the rubber pad (10) is in contact with the upper side inner wall of the two split aluminum sheet plate (4).

4. A steel truss for reinforced concrete according to claim 1, characterized by The tensioning component (11) comprises a tensioning cylinder (111) and a rope cylinder (112), the rope cylinder (112) is rotatably connected to the inner wall of the tensioning cylinder (111), the outer side of the rope cylinder (112) is wound with a cable (12), the right end of the cable (12) is fixedly connected with the side wall of the rope cylinder (112), the left side wall of the tensioning cylinder (111) is provided with a rope hole, the left end of the cable (12) passes through the rope hole and is fixedly connected with a tensioning block (13), the lower side wall of the tensioning block (13) and the rope cylinder (112) are fixedly connected with a locking pin (14), the side wall of the split aluminum sheet plate (4) is provided with a plurality of locking holes (15) matched with the locking pin (14), the upper side wall of the tensioning cylinder (111) is fixedly connected with a limiting cover (16), the upper side wall of the limiting cover (16) is provided with a insertion hole, and the insertion hole is inserted with a rotating rod (17), the lower end of the rotating rod (17) is located in the limiting cover (16), and is fixedly connected with a circular plate (18), the upper side wall of the circular plate (18) is fixedly connected with two positioning pins (19), the inner wall of the limiting cover (16) is provided with a plurality of positioning grooves matched with the positioning pins (19), the side wall of the circular plate (18) is provided with two sliding holes, and the sliding holes are inserted with a sliding pin (20), the lower ends of the two sliding pins (20) are fixedly connected with the same fixed plate (21), and the fixed plate (21) is connected with the rope cylinder (112) through a tensioning component (22).

5. A steel bar truss for reinforced concrete according to claim 4, characterized by The tension assembly (22) comprises a tension cylinder (221), the upper shaft end of the rope cylinder (112) extends out of the tension cylinder (111), and is fixedly connected with the lower side wall of the tension cylinder (221), the lower side wall of the fixed plate (21) is fixedly connected with a cylinder (222), the lower end of the cylinder (222) is rotatably connected with the lower side inner wall of the tension cylinder (221), the rod walls on the left and right sides of the cylinder (222) are fixedly connected with extrusion plates (23), the front and rear inner walls of the tension cylinder (221) are fixedly connected with push plates (24), the same spring is fixedly connected between the extrusion plate (23) and the push plate (24) on the same side, the right side wall of the extrusion plate (23) on the right side is fixedly connected with a conductive block (25), the lower side inner wall of the tension cylinder (111) is fixedly connected with a micro power supply (26), the micro power supply (26) and the conductive block (25) are electrically connected, the inner wall of the tension cylinder (221) is inlaid with an arc-shaped conductive plate (27), the right side outer wall of the tension cylinder (111) is fixedly connected with a prompt lamp (28), and the arc-shaped conductive plate (27) and the prompt lamp (28) are electrically connected.

6. A steel bar truss for reinforced concrete according to claim 4, characterized by The upper end of the rotating rod (17) is fixedly connected with a friction disc (29), and the outer wall of the friction disc (29) is provided with friction lines.

7. A steel bar truss for reinforced concrete according to claim 4, characterized by The material of the cable (12) is stainless steel, and the diameter of the cable (12) is 0.5 mm.

8. A construction method of a steel bar truss for reinforced concrete using the steel bar truss for reinforced concrete according to claim 1, characterized by, The method comprises the following steps: S1, using a welding device, welding an upper chord steel bar (1), two lower chord steel bars (2) and two web steel bars (3) together, and during the welding process, the protrusions and recesses of the two web steel bars (3) are on the same straight line; S2, cutting the split type aluminum sheet plate (4) by using a cutting device, so that the cutout (5) of the split type aluminum sheet plate (4) corresponds to the welding position of the web steel bar (3) and the upper chord steel bar (1); S3, inserting the two cut split type aluminum sheet plates (4) between the welded upper chord steel bar (1), two lower chord steel bars (2) and two web steel bars (3), and aligning the cutout (5) of the split type aluminum sheet plate (4) with the welding position of the web steel bar (3) and the upper chord steel bar (1); S4, fixing the two split type aluminum sheet plates (4) by using a plurality of positioning assemblies (6), and then inserting a plurality of tensioning assemblies (11) into the locking holes (15) on the surfaces of the two split type aluminum sheet plates (4) to fix the positions of the two split type aluminum sheet plates (4); S5, welding the two split type aluminum sheet plates (4) by using a welding device, and during the welding process, the positioning assembly (6) and the tensioning assembly (11) at the welding position are removed, and after the two split type aluminum sheet plates (4) are welded, the above steps are repeated to weld another two split type aluminum sheet plates (4), and the two split type aluminum sheet plates (4) are welded together with the previous two split type aluminum sheet plates (4).

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