A cast-free vertical connection structure of PEC column

Abstract

The present application relates to a kind of free pouring PEC column vertical connection structure, including upper PEC column and lower PEC column, and the butt joint surface of upper PEC column is provided with tenon and first pair of inserts, and the butt joint surface of lower PEC column is provided with recess and second pair of inserts, and the concrete outer surface of lower PEC column is also pre-buried with connecting steel plate, when upper PEC column and lower PEC column are vertically butted, positioning is carried out by tenon embedded in recess, and position is fixed by the butt insertion of first pair of inserts and second pair of inserts, the step of additional setting temporary fixed support structure is saved, and the concrete surface of upper PEC column and lower PEC column is connected together by connecting steel plate using bolt, the pre-poured concrete of upper PEC column and lower PEC column is realized upper and lower continuous, ensure that the force transmission effect is better, also free pouring concrete at connecting place on site, improve assembly efficiency, save labor and material, it is favorable to reduce cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of prefabricated buildings, and particularly relates to a pouring-free PEC column vertical connection structure. BACKGROUND

[0002] The PEC column is a partially coated steel-concrete column, which is formed by setting stirrups on both sides of the web of the H-shaped steel and pouring concrete. When the PEC columns are vertically connected, the existing technology usually leaves a certain height at the connecting end of the upper and lower PEC columns and does not pre-pour concrete in the factory. Instead, the connecting steel plate and bolts are used to connect the webs of the upper and lower PEC columns at the construction site, and then the cavity at the connecting end is poured with concrete on site. This connection structure is complicated and time-consuming, and the construction quality is difficult to guarantee. In addition, the connecting end of the upper and lower PEC columns usually leaves a protruding pouring gate that needs to be cut off later, which not only wastes materials but also affects the appearance and increases the working hours. The existing technology facilitates the positioning of the upper and lower PEC columns. The ears are usually arranged on the flanges of the connecting end of the upper and lower PEC columns. After the upper and lower PEC columns are vertically connected, the ears of the upper and lower PEC columns are fixed by bolts through the connecting plate, which serves as a temporary fixing function. After the vertical connection of the upper and lower PEC columns is completed, the ears are cut off, resulting in a large amount of construction work and waste of materials. SUMMARY

[0003] The present application discloses a pouring-free PEC column vertical connection structure. The connecting end of the upper and lower PEC columns is pouring-free, and no temporary fixing measures are needed when the upper and lower PEC columns are connected. The present application has the technical advantages of efficient and quick construction, material saving, time saving, and cost reduction.

[0004] To achieve the above-mentioned purposes, the technical solutions adopted by the present application are as follows:

[0005] The application discloses a non-pouring PEC column vertical connection structure, which comprises an upper PEC column and a lower PEC column, the upper PEC column comprises an upper PEC column flange, an upper PEC column web and upper PEC column concrete, the lower PEC column comprises a lower PEC column flange, a lower PEC column web and lower PEC column concrete, the end face of the upper PEC column flange is longer than the end face of the upper PEC column web, a tenon is formed on the bottom face of the upper PEC column concrete and is perpendicular to the upper PEC column web, the bottom face of the tenon is flush with the end face of the upper PEC column flange, the bottom face of the upper PEC column concrete on the two sides of the tenon is lower than the end face of the upper PEC column flange, a first pair of inserts are embedded on the bottom face of the upper PEC column concrete on the two sides of the tenon, and bolt holes are formed on the outer side face of the upper PEC column web on the two sides of the upper PEC column web; a groove is formed on the top face of the lower PEC column concrete and is perpendicular to the lower PEC column web, the bottom face of the groove is flush with the top face of the lower PEC column flange, the top face of the lower PEC column concrete on the two sides of the groove is higher than the top face of the lower PEC column flange, a second pair of inserts are embedded on the top face of the lower PEC column concrete on the two sides of the groove, and the edges of the lower PEC column concrete on the two sides of the lower PEC column web are respectively provided with a connecting steel plate, the connecting steel plate comprises a vertical plate and a horizontal plate, the vertical plate is flush with the outer side face of the lower PEC column concrete, one end of the horizontal plate is connected with the vertical plate, the other end of the horizontal plate is welded on the lower PEC column web, the horizontal plate is embedded in the lower PEC column concrete, bolt holes are formed on the connecting steel plate, and the vertical plate of the connecting steel plate exceeds the top face of the lower PEC column concrete; the lower end of the upper PEC column is vertically connected with the upper end of the lower PEC column, the tenon is embedded in the groove, the first pair of inserts and the second pair of inserts are fixed by being inserted into each other, the vertical plate of the connecting steel plate is attached to the outer side face of the upper PEC column concrete, the vertical plate is fixed on the outer side face of the upper PEC column concrete by using bolts, and the upper PEC column flange and the lower PEC column flange are welded and fixed.

[0006] Further, the area, where the outer side face of the upper PEC column concrete is provided with a threaded hole, is concave relative to the upper part of the outer side face of the upper PEC column concrete, where the threaded hole is located.

[0007] Further, two horizontal plates are arranged in a spaced manner, one end of each of the two horizontal plates is fixedly connected with the vertical plate, the other end of each of the two horizontal plates is welded and fixed with the lower PEC column web, and the two horizontal plates are filled and covered by the lower PEC column concrete.

[0008] Further, the upper PEC column web and the lower PEC column web are respectively provided with stirrups and longitudinal steel bars, one end of the first pair of inserts is connected with the upper PEC column longitudinal steel bar, and the other end of the first pair of inserts extends out of the bottom face of the upper PEC column concrete on the two sides of the tenon; one end of the second pair of inserts is connected with the lower PEC column longitudinal steel bar, and the other end of the second pair of inserts is flush with the top face of the lower PEC column concrete on the two sides of the groove.

[0009] Further, the first pair of inserts comprises a first sleeve and a plug, the first sleeve is open at both upper and lower ends, the first sleeve is embedded in the upper PEC column concrete, the upper PEC column longitudinal reinforcement penetrates into the first sleeve, the upper PEC column longitudinal reinforcement end is provided with a first pier head, the lower part of the first pier head is provided with the plug, one end of the plug is embedded in the first sleeve, and the other end of the plug extends out of the first sleeve.

[0010] The second pair of inserts comprises a second sleeve and an elastic clamping piece, the second sleeve is open at both upper and lower ends, the second sleeve is embedded in the lower PEC column concrete, the lower PEC column longitudinal reinforcement penetrates into the second sleeve, the lower PEC column longitudinal reinforcement end is provided with a second pier head, the upper part of the second pier head is provided with the elastic clamping piece, the elastic clamping piece is fixed on the second sleeve, the plug penetrates through the elastic clamping piece and is inserted into the second sleeve.

[0011] Further, the diameter of the first pier head is greater than the diameter of the upper PEC column longitudinal reinforcement, the diameter of the second pier head is greater than the diameter of the lower PEC column longitudinal reinforcement, the outer wall of the upper PEC column longitudinal reinforcement extending into the first sleeve is provided with a first telescopic rivet, and the outer wall of the lower PEC column longitudinal reinforcement extending into the second sleeve is provided with a second telescopic rivet.

[0012] Further, the first sleeve and the second sleeve are filled with corrosion-resistant sealing material.

[0013] Further, the plug is divided into a fixed part, a plug rod and a locking head from top to bottom, the width of the fixed part is greater than the width of the plug rod, the fixed part is embedded in the first sleeve, the plug rod and the locking head are located outside the first sleeve, the lower part of the fixed part is outwardly horizontally extended to form a first limiting part, the connection between the fixed part and the plug rod forms a second limiting part, the connection between the plug rod and the locking head is outwardly horizontally extended along the outer circumference to form a third limiting part, the bottom end of the first sleeve abuts against the first limiting part, after the first pair of inserts and the second pair of inserts are inserted into each other, the second limiting part presses the top end of the elastic clamping piece, the bottom end of the elastic clamping piece abuts against the third limiting part, the plug rod is inserted into the elastic clamping piece, the locking head penetrates out of the elastic clamping piece, and the contact surface between the second limiting part and the elastic clamping piece is coated with epoxy resin.

[0014] The application improves the structure of the connecting end of the upper and lower PEC columns, makes the precast concrete of the upper and lower PEC columns continuous, and guarantees the good force transmission effect; the connecting steel plate is installed on the concrete side of the lower PEC column in advance, the bolt hole is opened on the concrete side of the upper PEC column, the upper PEC column and the lower PEC column after butt joint are fixed and connected through the connecting steel plate and the bolt, the step of pouring the concrete on the butt joint site in the prior art is omitted, the wet operation on site is reduced, the setting of the connecting steel plate on the concrete surface can also reduce the risk of structural instability; in addition, the first pair of inserts and the tenon are set on the upper PEC column in advance, and the second pair of inserts and the groove are set on the lower PEC column in advance, the positioning of the upper and lower PEC columns is realized through the cooperation of the first pair of inserts and the tenon and the second pair of inserts and the groove, and the ear plate is not needed, so that the connection of the columns is simpler, more efficient and faster. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structure schematic view of the upper PEC column in the embodiment;

[0016] Figure 2 It is a structure schematic view of the lower PEC column in the embodiment;

[0017] Figure 3 It is a vertical connection node schematic view of the upper and lower PEC columns;

[0018] Figure 4 It is a vertical sectional view of the lower PEC column;

[0019] Figure 5 It is a vertical sectional view of the vertical connection node of the upper and lower PEC columns;

[0020] Figure 6 It is Figure 5 It is an enlarged view of A in the middle;

[0021] Figure 7 It is a structure schematic view of the first pair of inserts on the upper PEC column;

[0022] Figure 8 It is a structure schematic view of the second pair of inserts on the lower PEC column.

[0023] Reference signs:

[0024] 1. Upper PEC column flange; 2. Upper PEC column web; 3. Upper PEC column concrete; 4. Tenon; 5. Bolt hole; 6. First pair of inserts; 61. First sleeve; 62. First rivet; 63. Plug; 631. Fixing part; 632. Insert rod; 633. Locking head; 634. First limiting part; 635. Second limiting part; 636. Third limiting part; 64. First pier head; 7. Lower PEC column flange; 8. Lower PEC column web; 9. Lower PEC column concrete; 10. Connecting steel plate; 11. Groove; 12. Bolt; 13. Second pair of inserts; 131. Second sleeve; 132. Elastic clip; 133. Second pier head; 134. Second rivet; 14. Interface between upper and lower PEC columns; 15. Longitudinal reinforcement of lower PEC column; 16. Longitudinal reinforcement of upper PEC column; 17. Epoxy resin; 18. Anti-corrosion sealing material. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0026] This embodiment discloses a vertical connection structure for PEC columns, including an upper PEC column and a lower PEC column. The bottom end of the upper PEC column is fixedly connected to the top end of the lower PEC column to form a vertical connection node. Both the upper and lower PEC columns include H-beams and concrete filling both sides of the web of the H-beams. The structure of the upper PEC column is as follows: Figure 1 As shown, for ease of structural illustration, Figure 1 The bottom connecting end of the upper PEC column should be placed upwards, so that... Figure 1 The direction shown is for reference, and the structural settings of the upper PEC column connection end are introduced. Figure 1 The left and right sides are the upper PEC column flanges 1, and the upper PEC column web 2 connects the two ends of the upper PEC column flanges 1. The upper PEC column concrete 3 is located on both sides of the upper PEC column web 2. When forming the upper PEC column concrete 3, let... Figure 1The top surface of the upper PEC column concrete 3 near the upper PEC column flange 1 is lower than the top surface of the upper PEC column flange 1, and a tenon 4 is formed in the middle part, the top surface of the tenon 4 is flush with the top surface of the upper PEC column flange 1, and the length direction of the tenon 4 is perpendicular to the upper PEC column web 2. In the upper PEC column concrete 3 on each side of the upper PEC column web 2, the upper PEC column concrete 3 in the height range near the tenon 4 is relatively thin, and the area with thinner thickness is used for embedding the connecting steel plate 10 when connected with the lower PEC column later, so that the outer surface of the connecting steel plate 10 can be flush with the overall outer surface of the upper PEC column concrete 3. Multiple bolt holes 5 are arranged at intervals in the area where the upper PEC column concrete 3 on each side is thinner. The tenon 4 is arranged along the entire thickness direction of the upper PEC column concrete 3 of the upper PEC column, and is located in the middle of the upper PEC column flange 1 at both ends. The first pair of inserts 6 are embedded in the upper PEC column concrete 3 on both sides of the upper PEC column web 2, and the first pair of inserts 6 are arranged on the upper PEC column concrete 3 on both sides of the upper PEC column web 2, the lower part of the first pair of inserts 6 is embedded in the upper PEC column concrete 3, and the upper part of the first pair of inserts 6 is exposed.

[0027] The structure of the lower PEC column is shown in Figure 2 Figure 2 The lower PEC column flange 7 is located in the middle of the front and rear ends, the lower PEC column web 8 is vertically connected between the two lower PEC column flanges 7, and the lower PEC column concrete 9 is filled on both sides of the lower PEC column web 8. The connecting steel plate 10 is arranged on the lower PEC column concrete 9 on both sides, the connecting steel plate 10 is connected by a vertical plate and a horizontal plate, the vertical plate is flush with the outer side wall of the lower PEC column concrete 9, and the horizontal plate can be arranged in one layer or multiple layers spaced apart, for example, two layers of horizontal plates are arranged in the embodiment, one end of the two layers of horizontal plates is welded on the vertical plate, the other end of the two layers of horizontal plates is vertically welded on the lower PEC column web 8, and the horizontal plate of the connecting steel plate 10 is embedded in the lower PEC column concrete 9, and the vertical plate of the connecting steel plate 10 is provided with bolt holes at intervals. When the lower PEC column concrete 9 is formed, the top surface of the lower PEC column concrete 9 located in the middle of the lower PEC column flange 7 is flush with the top surface of the lower PEC column flange 7, and the top surface of the lower PEC column concrete 9 near the lower PEC column flange 7 is higher than the lower PEC column flange 7, so that a groove 11 is formed in the middle of the lower PEC column flange 7 at both ends, the length direction of the groove 11 is perpendicular to the lower PEC column web 8, and the groove 11 is also arranged along the entire thickness direction of the lower PEC column concrete 9 of the lower PEC column. The top surface of the connecting steel plate 10 is higher than the highest top surface of the lower PEC column concrete 9, the second pair of inserts 13 are embedded in the lower PEC column concrete 9 on both sides of the groove 11, the second pair of inserts 13 are distributed on both sides of the lower PEC column web 8, and the second pair of inserts 13 are used for inserting with the first pair of inserts 6. ​

[0028] As Figure 5 shown, the upper PEC column web plate 2 is provided with upper PEC column longitudinal reinforcement 16 and stirrup on both sides, and the lower PEC column web plate 8 is provided with lower PEC column longitudinal reinforcement 15 and stirrup on both sides. The embedded end of the first pair of inserts 6 is fixedly connected with the upper PEC column longitudinal reinforcement 16, and the second pair of inserts 13 is fixedly connected with the lower PEC column longitudinal reinforcement 15.

[0029] The structure of the first pair of inserts 6 is shown in Figure 7 The first pair of inserts 6 includes a first sleeve 61 and a plug 63. The upper and lower ends of the first sleeve 61 are open. The lower end of the first sleeve 61 is open larger than the upper end. The first sleeve 61 is completely embedded in the upper PEC column concrete 3. The bottom end of the upper PEC column longitudinal reinforcement 16 penetrates into the first sleeve 61, and a first stub 64 is arranged at the bottom end of the upper PEC column longitudinal reinforcement 16. The diameter of the first stub 64 is larger than the diameter of the upper PEC column longitudinal reinforcement 16. The outer wall of the upper PEC column longitudinal reinforcement 16 extending into the first sleeve 61 is provided with a first rivet 62 which can be extended and retracted. The first stub 64 and the first rivet 62 can both play a role in anti-pulling. The plug 63 is arranged at the lower part of the first stub 64 in the first sleeve 61. The plug 63 is divided into a fixed part 631, a plug rod 632 and a locking head 633 from top to bottom. The width of the fixed part 631 is larger than the width of the plug rod 632. The fixed part 631 is embedded in the first sleeve 61 and fixed. The plug rod 632 and the locking head 633 both extend out of the first sleeve 61. The lower part of the outer circumference of the fixed part 631 extends outwardly and horizontally to form a first limiting part 634. The diameter of the plug rod 632 gradually decreases from top to bottom. The connection between the fixed part 631 and the plug rod 632 forms a second limiting part 635. The bottom end of the first sleeve 61 abuts against the first limiting part 634. The connection between the plug rod 632 and the locking head 633 extends outwardly and horizontally along the outer circumference to form a third limiting part 636. The diameter of the locking head 633 gradually decreases from top to bottom, forming a circular truncated cone structure.

[0030] The structure of the second pair of inserts 13 is shown in Figure 8As shown, the second pair of inserts 13 includes a second sleeve 131 and an elastic clamp 132, the upper and lower ends of the second sleeve 131 are open, the upper end is larger than the lower end, and the second sleeve 131 is completely embedded in the lower PEC column concrete 9. The top of the lower PEC column longitudinal reinforcement 15 penetrates into the second sleeve 131, and a second pier head 133 is arranged at the top end of the lower PEC column longitudinal reinforcement 15, the diameter of the second pier head 133 is larger than that of the lower PEC column longitudinal reinforcement 15, and the outer wall of the lower PEC column longitudinal reinforcement 15 extending into the second sleeve 131 is provided with a second telescopic rivet 134, and the second pier head 133 and the second telescopic rivet 134 also play a role in anti-pulling. The upper part of the second sleeve 131 located at the second pier head 133 is provided with an elastic clamp 132, which is a hollow cylindrical structure with open upper and lower ends, has elastic deformation capability, and the top end of the elastic clamp 132 is fixed on the second sleeve 131.

[0031] When the upper PEC column and the lower PEC column are vertically connected, the first pair of inserts 6 and the second pair of inserts 13 are inserted into each other, as shown in Figure 6 The insertion rod 632 and the locking head 633 of the first pair of inserts 6 are inserted into the second pair of inserts 13, the elastic clamp 132 begins to expand outward, the locking head 633 passes through the inner cavity of the elastic clamp 132 and extends to the outside, the elastic clamp 132 automatically resets and clamps the locking head 633, and the bottom end of the elastic clamp 132 is clamped at the third limiting portion 636. Before the first pair of inserts 6 and the second pair of inserts 13 are inserted, epoxy resin 17 is applied to the surface of the second limiting portion 635 of the first pair of inserts 6, and epoxy resin 17 is also applied to the top surface of the elastic clamp 132 of the second pair of inserts 13, so that after the first pair of inserts 6 and the second pair of inserts 13 are inserted, the second limiting portion 635 and the elastic clamp 132 are in close contact, achieving good sealing effect. In addition, the inner cavity of the first sleeve 61 of the first pair of inserts 6 and the inner cavity of the second sleeve 131 of the second pair of inserts 13 are filled with corrosion-resistant sealing material 18.

[0032] The bottom connecting end of the upper PEC column and the top connecting end of the lower PEC column are vertically connected, as shown in Figures 4-5As shown, the tenon 4 is embedded in the groove 11, which can achieve rapid positioning, the first pair of inserts 6 is inserted into the second pair of inserts 13, which plays an auxiliary fixing role, the vertical plate of the connecting steel plate 10 on the lower PEC column is attached to the outer surface of the upper PEC column concrete 3 provided with bolt holes 5, and the bolt 12 is used to sequentially pass through the bolt holes on the connecting steel plate 10 and the bolt holes 5 on the upper PEC column concrete 3, so as to fix the vertical plate of the connecting steel plate 10 on the upper PEC column concrete 3, at this time, the bottom surface of the tenon 4 is closely attached to the bottom surface of the groove 11, the bottom surfaces of the upper PEC column concretes 3 on both sides of the tenon 4 are closely attached to the top surfaces of the lower PEC column concretes 9 on both sides of the groove 11 to form the upper and lower PEC column interface 14, after the above connection is completed, the upper PEC flange 1 and the lower PEC column flange 7 are welded and fixed at the connection position, and no temporary support is needed throughout the process.

[0033] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A cast-in-place-eliminated PEC column vertical connection structure, comprising an upper PEC column and a lower PEC column, the upper PEC column comprising an upper PEC column flange, an upper PEC column web and upper PEC column concrete, the lower PEC column comprising a lower PEC column flange, a lower PEC column web and lower PEC column concrete, characterized in that: The end face of the upper PEC column flange at the connecting end is longer than the end face of the upper PEC column web, a tenon perpendicular to the upper PEC column web is formed on the bottom face of the upper PEC column concrete, the bottom face of the tenon is flush with the end face of the upper PEC column flange, the bottom face of the upper PEC column concrete on both sides of the tenon is lower than the end face of the upper PEC column flange, a first pair of inserts are embedded on the bottom face of the upper PEC column concrete on both sides of the tenon, and bolt holes are formed in the outer side face of the upper PEC column web on both sides.

2. The cast-free PEC column vertical connection structure according to claim 1, characterized in that: The outer side face of the upper PEC column concrete is recessed relative to the upper outer side face of the upper PEC column concrete above the threaded hole.

3. The cast-free PEC column vertical connection structure according to claim 1, characterized in that: The two horizontal plates are fixedly connected to the vertical plate at the same end, and are fixedly connected to the lower PEC column web at the other end, and the two horizontal plates are filled and covered by the lower PEC column concrete.

4. The cast-free PEC column vertical connection structure according to claim 1, characterized in that: The upper PEC column web and the lower PEC column web are respectively provided with stirrups and longitudinal steel bars, one end of the first pair of inserts is connected to the upper PEC column longitudinal steel bars, and the other end of the first pair of inserts protrudes from the bottom face of the upper PEC column concrete on both sides of the tenon.

5. The cast-free PEC column vertical connection structure according to claim 4, characterized in that: The first pair of inserts comprises a first sleeve and a plug, the upper and lower ends of the first sleeve are open, the first sleeve is embedded in the upper PEC column concrete, the upper PEC column longitudinal steel bars pass through the first sleeve, the end of the upper PEC column longitudinal steel bars is provided with a first stud, the lower part of the first stud is provided with the plug, one end of the plug is embedded in the first sleeve, and the other end of the plug protrudes outside the first sleeve. The second pair of inserts comprises a second sleeve and an elastic clamping piece. The upper and lower ends of the second sleeve are open. The second sleeve is embedded in the concrete of the lower PEC column. The longitudinal reinforcement of the lower PEC column penetrates into the second sleeve. The end of the longitudinal reinforcement of the lower PEC column is provided with a second pier head. The upper part of the second pier head is provided with the elastic clamping piece. The elastic clamping piece is fixed on the second sleeve. The plug penetrates through the elastic clamping piece and is inserted into the second sleeve.

6. The cast-free PEC column vertical connection structure according to claim 5, characterized in that: The diameter of the first pier head is greater than the diameter of the longitudinal reinforcement of the upper PEC column. The diameter of the second pier head is greater than the diameter of the longitudinal reinforcement of the lower PEC column. The outer wall of the longitudinal reinforcement of the upper PEC column extending into the first sleeve is provided with a first retractable rivet. The outer wall of the longitudinal reinforcement of the lower PEC column extending into the second sleeve is provided with a second retractable rivet.

7. The cast-free PEC column vertical connection structure according to claim 5, characterized in that: The first sleeve and the second sleeve are filled with anticorrosive sealing material.

8. The cast-free PEC column vertical connection structure according to claim 5, characterized in that: The plug is divided into a fixed part, a plug rod and a locking head from top to bottom. The width of the fixed part is greater than the width of the plug rod. The fixed part is embedded in the first sleeve. The plug rod and the locking head are located outside the first sleeve. The lower part of the fixed part is outwardly horizontally extended to form a first limiting part. The connection between the fixed part and the plug rod forms a second limiting part. The connection between the plug rod and the locking head is outwardly horizontally extended along the outer circumference to form a third limiting part. The bottom end of the first sleeve abuts against the first limiting part. After the first pair of inserts and the second pair of inserts are inserted into each other, the second limiting part presses the top end of the elastic clamping piece. The bottom end of the elastic clamping piece abuts against the third limiting part. The plug rod is inserted into the elastic clamping piece. The locking head penetrates out of the elastic clamping piece. The contact surface between the second limiting part and the elastic clamping piece is coated with epoxy resin.

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