Fabricated foundation pit beam segment splicing joint structure of square beam end

Abstract

The utility model discloses a square beam end's assembly type foundation pit beam section splicing joint structure, including two beams with square beam end, and the beam section end head face is equipped with the hole of inserting reinforcing bar or the hole of inserting key, and two beam sections are spliced through the mode of inserting reinforcing bar in the hole of inserting reinforcing bar or through the mode of inserting connecting key in the hole of inserting key and form the whole with splicing joint, and the whole is equipped with the cross joint fastener around the four sides of splicing joint, and the cross joint fastener is the square frame structure of big frame sets small frame, and the big frame includes the transverse screw rod, the transverse nut and the vertical clamping plate assembled together, and the small frame includes the longitudinal screw rod, the longitudinal nut, the clamping plate, the connecting rod and the set screw assembled together, and the clamping plate is four, and the internal angle is tightly buckled with the four corner of beam end on the both sides of splicing joint respectively, the utility model discloses can reduce the damage of beam end opening hole to beam section, and it is favorable to prolong the service life, and its assembly is convenient, and is convenient for dismantling and recycling.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated building technology, and in particular to a prefabricated foundation pit beam segment splicing node structure for square beam ends. Background Technology

[0002] To address the challenges of tight construction schedules, high stress levels, and stringent deformation control requirements for foundation pit support, a prefabricated reinforced concrete-steel hybrid support system (such as invention CN119640814A) capable of rapid installation and dismantling has emerged. This structure combines the advantages of high load-bearing capacity and low cost of reinforced concrete supports with the lightweight nature of steel supports, enabling multiple recycling and offering significant benefits throughout its lifespan. However, this system also has some drawbacks: the connection between reinforced concrete beam segments (referred to as "beam segments") and between beam segments and the steel structure relies on pre-drilled holes at the beam ends, achieved through connecting steel plates and bolts. This joint connection method requires numerous holes at the beam ends, causing significant damage to the beam segments and severely impacting their load-bearing capacity and lifespan. Furthermore, connecting beam segments requires numerous bolts and nuts, making the operation time-consuming and labor-intensive. Therefore, the development of novel connection node structures is necessary. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned shortcomings and provide a prefabricated foundation pit beam segment splicing node structure for square beam ends, so as to reduce the damage to the beam segment caused by openings, extend the service life, and facilitate assembly, dismantling and recycling.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a prefabricated foundation pit beam segment splicing node structure with square beam ends, including two beam segments with square beam ends. The end faces of the beam segments are provided with insertion holes or key holes. The two beam segments are spliced ​​to form a whole with a splicing seam by inserting insertion bars into the insertion holes or by inserting connecting keys into the key holes. A cross-seam buckle is provided around the splicing seam. The cross-seam buckle is a square frame structure with a large frame inside a small frame. The large frame includes a transverse screw, a transverse nut, and a longitudinal clamping plate assembled together. The small frame includes a longitudinal screw, a longitudinal nut, a positioning plate, a connecting rod, and a set screw assembled together. There are four positioning plates, and their inner corners are respectively fastened to the four corners of the beam ends on both sides of the splicing seam.

[0005] Preferably, the insertion holes or key holes are arranged vertically on the square beam end face of the beam segment.

[0006] Preferably, the keyhole is located at the center of the end face of the beam segment, and the cross-section of the keyhole is square, as is the cross-section of the corresponding connecting key.

[0007] Preferably, the positioning plate has an L-shaped cross-section, with protruding baffles at both ends. One flange end face has several connecting rod holes, each connecting rod hole corresponding to a set screw hole perpendicular to it. The set screw hole opens on the flange side, and two longitudinal screw holes are also arranged on the flange side.

[0008] Preferably, the inner angle of the L-shaped section of the positioning plate is 90°, and the inner angles of the four positioning plates are respectively fastened to the four corners of the beam ends on both sides of the splice joint. The longitudinal screw holes of the two positioning plates on the same side correspond one-to-one and are inserted with longitudinal screws, and longitudinal nuts are screwed on both ends of the longitudinal screws.

[0009] Preferably, the connecting rod holes of the two positioning plates at the same level correspond one-to-one and are filled with connecting rods, and all the set screw holes contain set screws.

[0010] Preferably, each of the two clamping plates on the same side has a longitudinal clamping plate on the outer surface of each end, and there are four longitudinal clamping plates in total; the two ends of the longitudinal clamping plates are provided with through transverse screw holes, and the transverse screw holes on the same level of the two longitudinal clamping plates at the same end of the clamping plate correspond to each other and are inserted with transverse screws, and transverse nuts are screwed on both ends of the transverse screws.

[0011] Preferably, several layers of carbon fiber cloth are wrapped around the beam ends on both sides of the cross-joint buckle and splice joint.

[0012] Preferably, an end plate is provided between the positioning plate and the side beam ends on both sides of the splice joint, and the end plate is located between the baffles at both ends of the positioning plate.

[0013] Preferably, the end plate is welded with a skeleton; the beam segment is a rectangular reinforced concrete beam segment or a steel pipe concrete segment with a square end section and a circular middle section.

[0014] The beneficial effects of this utility model are:

[0015] 1. The reinforced concrete beam segment in the node structure provided by this utility model has only one type of hole at the beam end for docking, which reduces the damage to the beam segment caused by the opening at the beam end compared with existing technologies (such as CN119640814A) and also helps to extend the service life.

[0016] 2. All components of this utility model can be disassembled, recycled, and reused, resulting in significant benefits throughout its entire lifespan and a substantial reduction in carbon emissions from material production.

[0017] 3. In the node structure provided by this utility model, the connection between beam segments is simple to operate. It only requires inserting reinforcing bars or connecting keys and wrapping carbon fiber cloth around the splice joint. It is more convenient to assemble than existing technologies (such as CN119640814A). Attached Figure Description

[0018] Figure 1A structural schematic diagram showing the installation of reinforcing bar holes at the end face of a beam segment;

[0019] Figure 2 A schematic diagram of a structure for setting keyholes on the end face of a beam segment;

[0020] Figure 3 for Figure 1 The diagram shows a structure in which multiple layers of carbon fiber cloth are wrapped around the splicing joint of the two beam segments.

[0021] Figure 4 for Figure 2 The diagram shows a structure in which multiple layers of carbon fiber cloth are wrapped around the splicing joint of the two beam segments.

[0022] Figure 5 This is a schematic diagram of the card slot plate.

[0023] Figure 6 This is a schematic diagram of the longitudinal clamping plate.

[0024] Figure 7 This is a schematic diagram of the small frame structure;

[0025] Figure 8 A schematic diagram of the structure after a large frame is placed around a small frame;

[0026] Figure 9 This is a schematic diagram of the assembled foundation pit beam segment splicing node structure at the end of a square beam after installation.

[0027] Figure 10 This is a schematic diagram of the prefabricated foundation pit beam segment splicing node structure after installation, which is another type of square beam end.

[0028] Figure 11 This is a schematic diagram of a structure in which a bone component is welded onto an end plate.

[0029] Figure 12 This is a schematic diagram of another type of bone component welded onto the end plate.

[0030] In the diagram: 1-beam segment, 101-reinforcing bar hole, 102-key hole, 2-carbon fiber cloth, 3-reinforcing bar; 4-connecting key, 5-positioning plate, 501-longitudinal screw hole, 502-connecting rod hole, 503-set screw hole, 504-baffle, 6-longitudinal clamping plate, 601-transverse screw hole, 7-longitudinal screw, 8-longitudinal nut, 9-transverse screw, 10-transverse nut, 11-set screw, 12-connecting rod, 13-end plate, 14-rib component. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0032] Example 1: As Figure 1-12 As shown, a prefabricated foundation pit beam segment splicing node structure with square beam ends includes two beam segments 1 with square beam ends. The end face of beam segment 1 is provided with insertion holes 101 or key holes 102. The two beam segments 1 are spliced ​​to form an integral whole with splicing seam by inserting insertion bars 3 into the insertion holes 101 or by inserting connecting keys 4 into the key holes 102. A cross-seam buckle is provided around the splicing seam. The cross-seam buckle is a square frame structure with a large frame inside a small frame. The large frame includes a transverse screw 9, a transverse nut 10 and a longitudinal clamping plate 6 assembled together. The small frame includes a longitudinal screw 7, a longitudinal nut 8, a positioning plate 5, a connecting rod 12 and a set screw 11 assembled together. There are four positioning plates 5, and their inner corners are respectively fastened to the four corners of the beam ends on both sides of the splicing seam.

[0033] Preferably, the insertion holes 101 or key holes 102 are arranged vertically on the end face of the square beam of beam segment 1.

[0034] Preferably, the keyhole 102 is arranged at the center of the end face of the beam segment 1, and the cross-section of the keyhole 102 is square, and the cross-section of the corresponding connecting key 4 is also square.

[0035] Preferably, there are four positioning plates 5. The positioning plate 5 has an L-shaped cross-section and protruding baffles 504 at both ends. A plurality of connecting rod holes 502 are provided on one flange end face. Each connecting rod hole 502 is correspondingly provided with a set screw hole 503 perpendicular to it. The set screw hole 503 opens on the side of the flange. Two longitudinal screw holes 501 are also provided on the side of the flange.

[0036] Preferably, the inner angle of the L-shaped section of the positioning plate 5 is 90°, and the inner angles of the four positioning plates 5 are respectively fastened to the four corners of the beam ends on both sides of the splice joint. The longitudinal screw holes 501 of the two positioning plates 5 on the same side correspond one-to-one and are inserted with longitudinal screws 7. The longitudinal screws 7 are screwed with longitudinal nuts 8 at both ends.

[0037] Preferably, the connecting rod holes 502 of the two level positioning plates 5 correspond one-to-one and the connecting rods 12 are inserted, and all the set screw holes 503 contain set screws 11.

[0038] Preferably, each of the two clamping plates 5 on the same side has a longitudinal clamping plate 6 on the outer surface of both ends, and there are four longitudinal clamping plates 6 in total; the two ends of the longitudinal clamping plates 6 are provided with through transverse screw holes 601, and the transverse screw holes 601 on the same level of the two longitudinal clamping plates 6 at the same end of the clamping plate 5 are corresponding to and inserted with transverse screws 9, and transverse nuts 10 are screwed on both ends of the transverse screws 9.

[0039] Preferably, such as Figure 3 and 4 As shown, several layers of carbon fiber cloth 2 are wrapped around the beam ends on both sides of the cross-joint buckle and splice joint.

[0040] Preferably, an end plate 13 is provided between the positioning plate 5 and the side of the beam end on both sides of the splice joint, and the end plate 13 is located between the baffles 504 at both ends of the positioning plate 5.

[0041] Preferably, the end plate 13 is welded with a skeleton 14; the beam segment 1 is a rectangular reinforced concrete beam segment or a steel pipe concrete segment with a square end section and a circular middle section.

[0042] Example 2: This example discloses the installation method of the prefabricated foundation pit beam segment splicing node structure at the end of the above-mentioned square beam, including the following steps:

[0043] S1: As Figure 3 , Figure 4 As shown, after inserting the reinforcing bar 3 into the reinforcing bar hole 101 on the end face of one beam segment 1, the exposed reinforcing bar 3 is then inserted into the reinforcing bar hole 101 on the end face of another beam segment 1, and the end faces of the two beam segments are brought into close contact; or after inserting the connecting key 4 into the key hole 102 on the end face of one beam segment 1, the exposed connecting key 4 is then inserted into the key hole 102 on the end face of another beam segment 1, and the end faces of the two beam segments are brought into close contact, thus achieving the initial splicing between the beam segments and forming a splice joint. Then, carbon fiber cloth 2 is wrapped around the splice joint to cover the spliced ​​area.

[0044] S2: As Figure 7 As shown, take two positioning plates 5, insert the connecting rod 12 into the connecting rod hole 502, and make the inner corner of the positioning plate 5 cross the seam and fasten it to the two corners of the upper surface of the beam segment 1; take out the other two positioning plates 5, insert the connecting rod 12 into the connecting rod hole 502, and make the inner corner of the positioning plate 5 cross the seam and fasten it to the two corners of the lower surface of the beam segment 1.

[0045] S3: Take four longitudinal screws 7 and pass them through the four sets of longitudinal screw holes 501 corresponding to the four positioning plates 5. Tighten the longitudinal nuts 8. Do not tighten the longitudinal nuts 8 at this time, leaving enough longitudinal space for the subsequent placement of the end plate 13.

[0046] S4: As Figure 8 As shown, take four longitudinal clamping plates 6 and place them outside the two ends of the positioning plate 5. Pass four transverse screws 9 through the four sets of transverse screw holes 601 on the four longitudinal clamping plates 6, and screw on the transverse nuts 10. At this time, do not tighten the transverse nuts 10, leaving enough transverse space for the subsequent placement of the end plate 13.

[0047] S5: Place the end plate 13 between the carbon fiber cloth 2 and the positioning plate 5, and position it between the baffles 504 at both ends of the positioning plate 5.

[0048] S6: Tighten the transverse nut 10 and longitudinal nut 8 in sequence to make the four locking plates 5 tightly fasten the four corners of the beam segment and make the end plate 13 immovable and unable to be moved out; finally, screw the set screw 11 into the set screw holes 503 on the upper and lower sides of the locking plate 5 to fix the connecting rod 12.

[0049] S7: Weld the skeleton 14 to both sides of the end plate 13 to complete the installation. The finished product is as follows: Figure 9 , Figure 10 As shown; welded structure as Figure 11 , Figure 12 As shown.

[0050] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A prefabricated foundation pit beam segment splicing node structure with square beam ends, comprising two beam segments (1) with square beam ends, characterized in that: The end face of the beam segment (1) is provided with a reinforcing bar hole (101) or a key hole (102). The two beam segments (1) are spliced ​​together to form an integral body with a splicing seam by inserting reinforcing bars (3) into the reinforcing bar hole (101) or by inserting connecting keys (4) into the key hole (102). A cross-seam buckle is provided around the splicing seam. The cross-seam buckle is a square frame structure with a large frame and a small frame. The large frame includes a transverse screw (9), a transverse nut (10) and a longitudinal clamping plate (6) assembled together. The small frame includes a longitudinal screw (7), a longitudinal nut (8), a positioning plate (5), a connecting rod (12) and a set screw (11) assembled together. The positioning plate (5) consists of four pieces, and their inner corners are respectively fastened to the four corners of the beam ends on both sides of the splicing seam.

2. The prefabricated foundation pit beam segment splicing node structure at the end of a square beam according to claim 1, characterized in that: The insertion holes (101) or key holes (102) are arranged vertically on the square beam end face of the beam segment (1).

3. The prefabricated foundation pit beam segment splicing node structure at the end of a square beam according to claim 1, characterized in that: The keyhole (102) is located at the center of the end face of the beam segment (1). The cross-section of the keyhole (102) is square, and the cross-section of the corresponding connecting key (4) is also square.

4. The prefabricated foundation pit beam segment splicing node structure at the end of a square beam according to claim 1, characterized in that: The card plate (5) has an L-shaped cross section and protruding baffles (504) at both ends. Several connecting rod holes (502) are provided on one flange end face. Each connecting rod hole (502) is arranged with a set screw hole (503) perpendicular to it. The set screw hole (503) opens on the flange side. Two longitudinal screw holes (501) are also arranged on the flange side.

5. The prefabricated foundation pit beam segment splicing node structure at the end of a square beam according to claim 4, characterized in that: The inner angle of the L-shaped section of the positioning plate (5) is 90°. The inner angles of the four positioning plates (5) are respectively fastened to the four corners of the beam ends on both sides of the splice joint. Among them, the longitudinal screw holes (501) of the two positioning plates (5) on the same side correspond one-to-one and are inserted with longitudinal screws (7). The longitudinal screws (7) are screwed with longitudinal nuts (8) at both ends.

6. The prefabricated foundation pit beam segment splicing node structure at the end of a square beam according to claim 5, characterized in that: The connecting rod holes (502) of the two level positioning plates (5) correspond one-to-one and the connecting rods (12) are inserted. All the set screw holes (503) contain set screws (11).

7. The prefabricated foundation pit beam segment splicing node structure at the end of a square beam according to claim 6, characterized in that: Two clamping plates (5) on the same side are each provided with a longitudinal clamping plate (6) on the outer surface of each end. There are four longitudinal clamping plates (6). The two ends of the longitudinal clamping plates (6) are provided with through transverse screw holes (601). The transverse screw holes (601) on the same level of the two longitudinal clamping plates (6) at the same end of the clamping plate (5) are respectively connected and a transverse screw (9) is inserted. The two ends of the transverse screw (9) are screwed with transverse nuts (10).

8. The prefabricated foundation pit beam segment splicing node structure at the end of a square beam according to claim 1, characterized in that: Several layers of carbon fiber cloth (2) are wrapped around the beam ends on both sides of the cross-joint buckle and splice joint.

9. The prefabricated foundation pit beam segment splicing node structure at the end of a square beam according to claim 4, characterized in that: An end plate (13) is also provided between the positioning plate (5) and the side of the beam end on both sides of the splice joint. The end plate (13) is located between the baffles (504) at both ends of the positioning plate (5).

10. The prefabricated foundation pit beam segment splicing node structure at the square beam end according to claim 9, characterized in that: The end plate (13) is welded with a skeleton (14); the beam segment (1) is a rectangular reinforced concrete beam segment or a steel pipe concrete with a square end section and a circular middle section.

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