Basement roof back-jacking device

Abstract

The utility model provides a basement roof back-jacking device, which belongs to the technical field of building protection and comprises a steel upright post, and an end plate is welded at the top of the steel upright post; a bottom plate is welded to the bottom of the steel stand column and connected with a movable head adjusting device. The adjustable head adjusting device comprises a steel plate located under the bottom plate, two vertical bolts are symmetrically welded to the middle of the steel plate in the front-back direction, the two bolts penetrate through two through holes formed in the bottom plate respectively, each bolt is provided with two corresponding nuts, and the two nuts are connected to the corresponding bolts in a screwed mode and clamp and fix the bottom plate. By combining other components, the height of the basement roof jacking device can be adjusted in the using process, the safety and stability of the basement roof jacking device are enhanced, and the defects that in the prior art, the height of the basement roof jacking device cannot be adjusted in the using process, and the safety and stability are insufficient are effectively overcome.

Description

Technical Field

[0001] The utility model belongs to the technical field of building protection, and particularly relates to a back-topping device for a basement top slab. Background Art

[0002] During the demolition process of tower cranes in construction projects, the demolition of tower cranes in the basement is often involved, where the basement is the first basement floor underground. During the demolition process of tower cranes in construction projects, after the main structure is completed, when using a truck crane to carry out the tower crane demolition operation in the basement, it poses a severe test to the bearing capacity of the basement top slab. In order to ensure the safe progress of the tower crane demolition operation, it is necessary to use the basement top slab back-topping device mentioned in the existing technical solution with the patent publication number of "CN213979041U" for corresponding temporary reinforcement.

[0003] However, the current basement top slab back-topping device still has defects such as inability to adjust the height during use, insufficient safety and stability. Summary of the Utility Model

[0004] To solve the defects in the existing technology, the utility model provides a basement top slab back-topping device, effectively avoiding the defects of the existing basement top slab back-topping device such as inability to adjust the height during use, insufficient safety and stability.

[0005] The utility model adopts the following technical solutions.

[0006] A basement top slab back-topping device, comprising:

[0007] A steel column, with an end plate welded to the top of the steel column;

[0008] A bottom plate is welded to the bottom of the steel column, and the bottom plate is connected to a swivel head adjusting device;

[0009] The swivel head adjusting device includes a steel plate located directly below the bottom plate. Two vertical bolts are symmetrically welded along the front-back direction at the middle of the steel plate. The two bolts respectively penetrate through two through holes opened on the bottom plate. Each bolt is provided with two corresponding nuts, and the two nuts are screwed onto their corresponding bolts and clamp the bottom plate;

[0010] The described basement top slab back-topping device further includes:

[0011] A first diagonal brace, which includes an outer tube one and an inner tube one. The inner tube one extends into one end of the outer tube one in an interference fit manner. The axes of the outer tube one and the inner tube one coincide. A number of pin holes one are arranged at equal intervals along the length direction on the outer wall of the inner tube one. A pin hole two is opened on the outer peripheral wall of one end of the outer tube one;

[0012] A circular steel sheet 1 is welded to the end wall at the other end of the outer pipe 1. One end of the steel pipe 1 is welded to the circular steel sheet 1, and a through pin shaft hole 1 is formed on the outer peripheral wall at the other end of the steel pipe 1;

[0013] A circular steel sheet 2 is welded to the end wall at the end of the inner pipe 1 that extends out of the outer pipe 1. One end of the steel pipe 2 is welded to the circular steel sheet 2, and a through pin shaft hole 2 is formed on the outer peripheral wall at the other end of the steel pipe 2;

[0014] The diagonal brace 1 is used to form a diagonal brace structure between the steel column and the ground.

[0015] Further, the steel column is an I-beam column;

[0016] A stiffening plate 2 is arranged between the steel column and the bottom plate;

[0017] Stiffening plates 1 are welded at positions of one-third of the length of the steel column from top to bottom in the vertical direction of the steel column. The three one-third segments from top to bottom in the vertical direction of the steel column are the segment 1, segment 2, and segment 3 of the steel column respectively;

[0018] A number of through holes are evenly formed on the web and flange of the segment 2 of the steel column and on the web and flange of the segment 3 of the steel column.

[0019] Further, the distance between two adjacent through holes is 150 mm, and the diameter of the through hole is 17 mm.

[0020] Further, the basement top slab back support device further includes:

[0021] The diagonal brace 2, and the diagonal brace 2 is shorter than the diagonal brace 1;

[0022] The diagonal brace 2 includes an outer pipe 2 and an inner pipe 2. The inner pipe 2 extends into one end of the outer pipe 2 in an interference fit manner. The axes of the outer pipe 2 and the inner pipe 2 coincide. A number of pin connection holes 3 are arranged at equal intervals along the length direction on the outer wall of the inner pipe 2, and a pin connection hole 4 is formed on the outer peripheral wall at one end of the outer pipe 2;

[0023] A circular steel sheet 3 is welded to the end wall at the other end of the outer pipe 2. One end of the steel pipe 3 is welded to the circular steel sheet 3, and a through pin shaft hole 3 is formed on the outer peripheral wall at the other end of the steel pipe 3;

[0024] A circular steel sheet 4 is welded to the end wall at the end of the inner pipe 2 that extends out of the outer pipe 2. One end of the steel pipe 4 is welded to the circular steel sheet 4, and a through pin shaft hole 4 is formed on the outer peripheral wall at the other end of the steel pipe 4;

[0025] The diagonal brace 2 is used to form a diagonal brace structure between the steel column and the ground.

[0026] Further, the distance between two adjacent pin connection holes 1 is less than the adjustment length of the bolt;

[0027] The distance between two adjacent pin connection holes three is less than the adjustment length of the bolt.

[0028] Furthermore, the distance between two adjacent pin connection holes one is 100 mm.

[0029] Furthermore, the basement top plate back support device further includes:

[0030] A connecting member, which includes a flat plate, on which two arc-shaped plates are symmetrically arranged in the horizontal direction. The two arc-shaped plates are respectively arc-shaped plate one and arc-shaped plate two. Two through holes one are respectively opened on both sides of the two arc-shaped plates. The two through holes one are used to be respectively opposite to two through holes provided. A pin shaft hole five and a pin shaft hole six are respectively opened on arc-shaped plate one and arc-shaped plate two. The pin shaft hole five and the pin shaft hole six are arranged opposite to each other;

[0031] The connecting member is used to connect the steel column with the first diagonal brace or the second diagonal brace.

[0032] Furthermore, the basement top plate back support device further includes:

[0033] A connecting boot, which includes a bottom wall plate. On both sides of the bottom wall plate, a positioning plate one and a positioning plate two are respectively provided. A pin shaft hole seven and a pin shaft hole eight are arranged side by side on the positioning plate one. A pin shaft hole nine and a pin shaft hole ten are arranged side by side on the positioning plate two. The pin shaft hole seven and the pin shaft hole nine are arranged opposite to each other. The pin shaft hole eight and the pin shaft hole ten are arranged opposite to each other. Two through openings are opened on the bottom wall plate;

[0034] The connecting boot is used to connect the first diagonal brace or the second diagonal brace with the ground.

[0035] Furthermore, the basement top plate back support device further includes:

[0036] A micro-jack.

[0037] The beneficial effects of the present utility model are that, compared with the prior art, the present utility model includes a steel column, and an end plate is welded on the top of the steel column; a bottom plate is welded on the bottom of the steel column, and the bottom plate is connected with the adjustable device of the flexible head; the adjustable device of the flexible head includes a steel plate located directly below the bottom plate. Two vertical bolts are symmetrically welded in the middle of the steel plate along the front-back direction. The two bolts respectively penetrate through two through holes opened on the bottom plate. Each bolt is provided with two corresponding nuts, and the two nuts are screwed on their corresponding bolts and clamp the bottom plate. This enables the height of the basement top plate back support device to be adjustable during use, enhancing its safety and stability; in addition, by combining the use of the first diagonal brace and the second diagonal brace, the safety and stability of the basement top plate back support device during its use are even higher. Description of the Drawings

[0038] Figure 1It is a schematic diagram of the on-site use of the basement top plate back support device in the present utility model.

[0039] Figure 2 It is a three-dimensional schematic diagram of the steel column in the present utility model.

[0040] Figure 3 It is a three-dimensional schematic diagram of the first diagonal brace in the present utility model.

[0041] Figure 4 It is a connection schematic diagram of the first circular steel sheet in the present utility model.

[0042] Figure 5 It is a connection schematic diagram of the second circular steel sheet in the present utility model.

[0043] Figure 6 It is a three-dimensional schematic diagram of the second diagonal brace in the present utility model.

[0044] Figure 7 It is a three-dimensional schematic diagram of the connecting piece on both sides of the first through hole in the horizontal direction in the present utility model.

[0045] Figure 8 It is a three-dimensional schematic diagram of the connecting piece on both sides of the first through hole in the vertical direction in the present utility model.

[0046] Figure 9 It is a three-dimensional schematic diagram of the connection boot in the present utility model.

[0047] Figure 10 It is an overall schematic diagram of the basement top plate back support device in the present utility model.

[0048] Appended drawing reference numerals: 1. Steel column, 2. First stiffening plate, 3. End plate, 4. Bottom plate, 5. Second stiffening plate, 6. Steel plate, 7. Bolt, 8. Nut, 9. Penetrating hole, 10. First diagonal brace, 11. First outer pipe, 12. First inner pipe, 13. First pin connection hole, 14. First circular steel sheet, 15. First steel pipe, 16. First pin shaft hole, 17. Second circular steel sheet, 18. Second steel pipe, 19. Second pin shaft hole, 20. Second diagonal brace, 21. Second outer pipe, 22. Second inner pipe, 23. Third pin connection hole, 24. Third steel pipe, 25. Fourth steel pipe, 26. Connecting piece, 27. Flat plate, 28. First arc-shaped plate, 29. Second arc-shaped plate, 30. First through hole, 31. Fifth pin shaft hole, 32. Sixth pin shaft hole, 33. Connection boot, 34. Bottom wall plate, 35. First positioning plate, 36. Second positioning plate, 37. Seventh pin shaft hole, 38. Eighth pin shaft hole, 39. Ninth pin shaft hole, 40. Tenth pin shaft hole, 41. Pin shaft. Specific implementation mode

[0049] To ensure the safe progress of the tower crane demolition operation, the basement roof back support device of the present utility model temporarily reinforces the basement roof. In terms of specific reinforcement measures, an adjustable steel column is introduced as a supplementary measure for basement roof reinforcement. The height of the steel column can be effectively adjusted through the swivel head adjustment device, which not only enhances the bearing capacity of the basement roof but also improves the safety and stability of the basement roof back support device during use.

[0050] According to the layout drawing of the truck crane used in the tower crane demolition operation, under the basement roof, the processed steel columns are arranged on both sides of each leg of the truck crane on the top wall of the basement roof, that is, 2 steel columns are arranged on both sides of each leg. Wooden formwork is padded at both ends of the steel column, and the adjusting nut at the base of the steel column is adjusted to fix the steel column, which further enhances the bearing capacity of the basement roof and also improves the safety and stability of the basement roof back support device during use.

[0051] To make the purpose, technical solution and advantages of the present utility model clearer, the following will combine the drawings in the embodiments of the present utility model to clearly and completely express the technical solution of the present utility model. The embodiments described in this application are only part of the embodiments of the present utility model, not all embodiments. According to the spirit of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the protection scope of the present utility model.

[0052] As Figure 1 and Figure 2 shown, a basement roof back support device includes:

[0053] Steel column 1, with an end plate 3 welded to the top of the steel column 1; the end plate 3 is a steel plate.

[0054] A bottom plate 4 is welded to the bottom of the steel column 1, and the bottom plate 4 is connected to the swivel head adjustment device; the bottom plate 4 is a steel plate.

[0055] The swivel head adjustment device includes a steel plate 6 directly below the bottom plate 4. At the middle of the steel plate 6, two vertical M40 bolts 7 are symmetrically welded along the front-rear direction. The two M40 bolts 7 respectively penetrate through two through holes opened on the bottom plate 4. Each M40 bolt 7 is provided with two corresponding nuts 8, and the two nuts 8 are screwed onto their corresponding bolts 7 and clamp the bottom plate 4.

[0056] The structure in which two nuts 8 clamp the bottom plate 4 can be: the top wall of one of the two nuts 8 abuts against the bottom wall of the bottom plate 4, and the bottom wall of the other nut 8 among the two nuts 8 abuts against the top wall of the bottom plate 4. In this way, after all the nuts 8 are rotated to move up and down on the bolt 7, the height of the steel column 1 can be adjusted by clamping the bottom plate 4 with the nuts 8, and thus the height of the basement roof jacking device can be adjusted.

[0057] In a preferred but non-limiting embodiment of the present utility model, the steel column 1 is an I-shaped steel column.

[0058] Using an I-shaped steel column has the advantages of high strength, light weight, good seismic resistance and flexible use.

[0059] In a preferred but non-limiting embodiment of the present utility model, a second stiffening plate 5 is provided between the steel column 1 and the bottom plate 4. The second stiffening plate 5 can be triangular in shape.

[0060] The second stiffening plate 5 can enhance the stiffness of the connection between the steel column 1 and the bottom plate 4.

[0061] In a preferred but non-limiting embodiment of the present utility model, a first stiffening plate 2 is welded at the position of each one-third segment of the length of the steel column 1 from high to low in the vertical direction of the steel column 1. The three one-third segments from high to low in the vertical direction of the steel column 1 are respectively the first segment, the second segment and the third segment of the steel column 1. The first stiffening plate 2 can be rectangular in shape.

[0062] Welding the first stiffening plate 2 at the position of each one-third segment of the length of the steel column 1 from high to low in the vertical direction of the steel column 1 can enhance the damage resistance of the basement roof jacking device, and further enhance the safety and stability of the basement roof jacking device.

[0063] In a preferred but non-limiting embodiment of the present utility model, a number of through holes 9 are evenly formed on the web and flange of the second segment of the steel column 1 and on the web and flange of the third segment of the steel column 1.

[0064] The side plates of the steel column 1 are flanges, and the middle plate of the steel column 1 is a web.

[0065] In a preferred but non-limiting embodiment of the present utility model, the distance between two adjacent through holes 9 is 150 mm, and the diameter of the through hole 9 is 17 mm.

[0066] The basement roof jacking device, as Figure 3 shown, further includes:

[0067] The first diagonal brace 10 includes an outer tube 11 and an inner tube 12. The inner tube 12 extends into one end of the outer tube 11 in a clearance fit manner. The axes of the outer tube 11 and the inner tube 12 coincide. A number of pin holes 13 are arranged equidistantly along the length direction on the outer wall of the inner tube 12. A through pin hole 2 is formed on the outer peripheral wall of one end of the outer tube 11. When a pin hole 13 and the pin hole 2 are aligned, inserting a pin rod into the pin hole 13 and the pin hole 2 can pin-connect the outer tube 11 and the inner tube 12. By pin-connecting different pin holes 13 and the pin hole 2 with a pin rod, the length of the first diagonal brace 10 can be adjusted telescopically. Both the outer tube 11 and the inner tube 12 are galvanized steel pipes.

[0068] A circular steel sheet 14 is welded to the end wall of the other end of the outer tube 11. As Figure 4 shown, the axis of the circular steel sheet 14 coincides with the axis of the outer tube 11. One end of a steel pipe 15 is welded to the circular steel sheet 14. A through pin shaft hole 16 is formed on the outer peripheral wall of the other end of the steel pipe 15. The axis of the steel pipe 15 coincides with the axis of the outer tube 11.

[0069] A circular steel sheet 17 is welded to the end wall of the end of the inner tube 12 that extends out of the outer tube 11. As Figure 5 shown, the axis of the circular steel sheet 17 coincides with the axis of the inner tube 12. One end of a steel pipe 18 is welded to the circular steel sheet 17. A through pin shaft hole 19 is formed on the outer peripheral wall of the other end of the steel pipe 18. The axis of the steel pipe 18 coincides with the axis of the inner tube 12.

[0070] The first diagonal brace 10 is used to form a diagonal brace structure between the steel column 1 and the ground.

[0071] In a preferred but non-limiting embodiment of the present utility model, the basement roof back support device, as Figure 6 shown, further includes:

[0072] A second diagonal brace 20, and the second diagonal brace 20 is shorter than the first diagonal brace 10;

[0073] The second diagonal brace 20 includes an outer tube 21 and an inner tube 22. The inner tube 22 extends into one end of the outer tube 21 in a clearance fit manner. The axes of the outer tube 21 and the inner tube 22 coincide. A number of pin holes 23 are arranged equidistantly along the length direction on the outer wall of the inner tube 22. A through pin hole 4 is formed on the outer peripheral wall of one end of the outer tube 21. When a pin hole 23 and the pin hole 4 are aligned, inserting a pin rod into the pin hole 23 and the pin hole 4 can pin-connect the outer tube 21 and the inner tube 22. By pin-connecting different pin holes 23 and the pin hole 4 with a pin rod, the length of the second diagonal brace 20 can be adjusted telescopically. Both the outer tube 21 and the inner tube 22 are galvanized steel pipes.

[0074] A circular steel sheet three is welded to the end wall at the other end of the outer pipe two 21. The circular steel sheet three coincides with the axis of the outer pipe two 21. One end of a steel pipe three 24 is welded to the circular steel sheet three. A through pin hole three is formed in the outer peripheral wall at the other end of the steel pipe three 24. The axis of the steel pipe three 24 coincides with the axis of the outer pipe two 21.

[0075] A circular steel sheet four is welded to the end wall at the end where the inner pipe two 22 extends out of the outer pipe two 21. The circular steel sheet four coincides with the axis of the inner pipe two 22. One end of a steel pipe four 25 is welded to the circular steel sheet four. A through pin hole four is formed in the outer peripheral wall at the other end of the steel pipe four 25. The axis of the steel pipe four 25 coincides with the axis of the inner pipe two 22.

[0076] The diagonal brace two 20 is used to form a diagonal brace structure between the steel column 1 and the ground.

[0077] In a preferred but non-limiting embodiment of the present utility model, the distance between two adjacent pin connection holes one 13 is less than the adjustment length of the bolt 7;

[0078] The distance between two adjacent pin connection holes three 23 is less than the adjustment length of the bolt 7.

[0079] In a preferred but non-limiting embodiment of the present utility model, the distance between two adjacent pin connection holes one 13 is 100 mm.

[0080] In a preferred but non-limiting embodiment of the present utility model, the basement top slab back support device, as Figure 7 and Figure 8 shown, further includes:

[0081] A connecting member 26, which includes a flat plate 27. Two arc-shaped plates are symmetrically arranged on the flat plate 27 in the horizontal direction. The two arc-shaped plates are respectively an arc-shaped plate one 28 and an arc-shaped plate two 29. Two through holes one 30 are formed on both sides of the two arc-shaped plates respectively. The two through holes one 30 are used to be respectively opposite to the two through holes 9. A through pin hole five 31 and a through pin hole six 32 are respectively formed on the arc-shaped plate one 28 and the arc-shaped plate two 29. The pin hole five 31 and the through pin hole six 32 are arranged opposite to each other. Both sides of the two arc-shaped plates can be the horizontal sides or the vertical sides.

[0082] The connecting member 26 is used to connect the steel column 1 to the diagonal brace one 10 or the diagonal brace two 20.

[0083] In a preferred but non-limiting embodiment of the present utility model, the basement top slab back support device, as Figure 9 shown, further includes:

[0084] Connecting boot 33, which includes a bottom wall plate 34. On both sides of the bottom wall plate 34, a first positioning plate 35 and a second positioning plate 36 are respectively provided. A through pin hole seven 37 and a through pin hole eight 38 are arranged side by side on the first positioning plate 35. A through pin hole nine 39 and a through pin hole ten 40 are arranged side by side on the second positioning plate 36. The pin hole seven 37 and the pin hole nine 39 are arranged opposite to each other, and the pin hole eight 38 and the pin hole ten 40 are arranged opposite to each other. Two through openings are provided on the bottom wall plate 34. The mutually opposite pin hole seven 37 and pin hole nine 39 are used for the pin 41 to pass through for pin connection. The mutually opposite pin hole eight 38 and pin hole ten 40 are used for the pin 41 to pass through for pin connection. Two anchor bolts can respectively pass through the two through openings and be fastened to the ground.

[0085] The connecting boot 33 is used to connect the first diagonal brace 10 or the second diagonal brace 20 to the ground.

[0086] In a preferred but non-limiting embodiment of the present utility model, the basement top plate back support device further includes:

[0087] Miniature jack.

[0088] The miniature jack is installed at the height adjustment point position of the steel column 1, that is, at the position of the bottom plate 4 between the two vertically arranged M40 bolts 7, to apply prestress to the steel column 1. After the prestress is increased, the corresponding nut 8 is used to fasten the bolt 7 so that the steel column 1 is in a state of pre-compressive stress. Then the miniature jack is relaxed. When the height of the miniature jack is insufficient, steel gaskets can be added to its upper and lower parts to achieve uniform and stable stress.

[0089] The working principle of the present utility model is:

[0090] As Figure 10As shown in the figure, when using a truck crane to remove the tower crane in the basement, the steel plate 6 under the steel column 1 is set on the top of the wooden formwork on the ground in the basement. Then, the micro-jack is installed at the height adjustment point of the steel column 1, that is, at the position of the bottom plate 4 between the two vertically arranged M40 bolts 7, which plays a role in applying prestress to the steel column 1. After all the nuts 8 are rotated to move up and down on the bolts 7, the bottom plate 4 can be clamped by the nuts 8 to adjust the height of the steel column 1 until the end plate 3 at the top of the steel column 1 abuts against the bottom of the wooden formwork provided on the basement top plate, so that the steel column 1 is in a stress-bearing state for the basement top. Then, the two through holes 30 of a connecting piece 26 are respectively aligned and fitted with the two through holes 9 on the steel column 1, and then the aligned through holes 30 and through holes 9 are screwed and fastened (the screwing and fastening method can be: a screw is passed through the aligned through holes 30 and through holes 9, and then a nut is screwed on the screw to fasten the steel column 1 and the connecting piece 26 together). Subsequently, a connecting shoe 33 is fastened to the ground by two anchor bolts passing through two through ports respectively. Then, the pin hole 16 on the steel pipe 15 of the first inclined strut 10 is aligned with the fifth pin hole 31 and the sixth pin hole 32 on the connecting piece 26, and then a pin is passed through the pin hole 16, the fifth pin hole 31 and the sixth pin hole 32 to achieve pin connection. Then, the second pin hole 19 on the steel pipe 18 of the first inclined strut 10 is aligned with the eighth pin hole 38 and the tenth pin hole 40 on the connecting shoe 33, and then a pin is passed through the pin hole 19, the eighth pin hole 38 and the tenth pin hole 40 to achieve pin connection. Accordingly, the safety and stability of the first inclined strut 10 during the use of the steel column 1 are higher, that is, the safety and stability of the first inclined strut 10 during the use of the basement top plate back-support device are higher.

[0091] In addition, two through holes 30 of a connecting member 26 can be respectively aligned and fitted with two through holes 9 on the steel column 1, and then the aligned through holes 30 and through holes 9 are screwed and fastened (the screwing and fastening method can be: passing a screw through the aligned through holes 30 and through holes 9, and then screwing a nut on the screw to fasten the steel column 1 and the connecting member 26 together). Subsequently, a connecting shoe 33 is fastened to the ground by passing two anchor bolts through two through openings respectively. Then, the pin hole three of the second diagonal brace 20 is aligned with the pin hole five 31 and the pin hole six 32 on the connecting member 26, and then a pin is passed through the pin hole three, the pin hole five 31 and the pin hole six 32 to achieve pin connection. Then, the pin hole four on the steel pipe four 25 of the second diagonal brace 20 is aligned with the pin hole seven 37 and the pin hole nine 39 on the connecting shoe 33, and then a pin is passed through the pin hole four, the pin hole seven 37 and the pin hole nine 39 to achieve pin connection. Accordingly, the safety and stability of the second diagonal brace 20 during the use of the steel column 1 are higher, that is, the safety and stability of the first diagonal brace 10 during the use of the basement top slab back support device are higher. Subsequently, the micro-jack is unloaded and loosened and the micro-jack is taken out.

[0092] The beneficial effects of the present utility model are as follows. Compared with the prior art, the present utility model includes a steel column, and an end plate is welded on the top of the steel column; a bottom plate is welded at the bottom of the steel column, and the bottom plate is connected to the flexible head adjusting device; the flexible head adjusting device includes a steel plate located directly below the bottom plate, and two vertical bolts are symmetrically welded in the middle of the steel plate along the front-rear direction. The two bolts respectively pass through two through holes formed on the bottom plate, and each bolt is provided with two corresponding nuts, and the two nuts are screwed on their corresponding bolts and clamp the bottom plate. This enables the height of the basement top slab back support device to be adjusted during use, enhancing its safety and stability; in addition, by combining the use of the first diagonal brace and the second diagonal brace, the safety and stability of the basement top slab back support device during its use are higher.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications or equivalent replacements can still be made to the specific implementation manners of the present utility model, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present utility model should be covered within the protection scope of the claims of the present utility model.

Claims

1. A basement roof return device, characterized in that: include: A steel column (1), with an end plate (3) welded to the top of the steel column (1); A bottom plate (4) is welded to the bottom of the steel column (1), and the bottom plate (4) is connected to the movable head adjustment device; The movable head adjustment device comprises a steel plate (6) located directly below the bottom plate (4), two vertical bolts (7) are welded symmetrically along the front-rear direction at the middle of the steel plate (6), the two bolts (7) respectively penetrate through two through holes opened on the bottom plate (4), each bolt (7) is provided with two corresponding nuts (8), the two nuts (8) are screwed onto the corresponding bolts (7) and clamp the bottom plate (4); The basement top plate returning device further comprises: A diagonal brace (10) comprises an outer tube (11) and an inner tube (12), wherein the inner tube (12) extends into one end of the outer tube (11) in a clearance fit manner, the axes of the outer tube (11) and the inner tube (12) coincide with each other, a plurality of pin-connecting holes (13) are formed on the outer wall of the inner tube (12) and are arranged equidistantly along the length direction thereof, and a pin-connecting hole (2) is formed on the outer peripheral wall of one end of the outer tube (11); A circular steel sheet (14) is welded to the end wall of the other end of the outer tube (11), one end of a steel tube (15) is welded to the circular steel sheet (14), and a through-type pin hole (16) is opened on the outer peripheral wall of the other end of the steel tube (15); A second circular steel sheet (17) is welded to the end wall of the inner tube (12) at the end extending out of the outer tube (11), one end of the second steel tube (18) is welded to the second circular steel sheet (17), and a second through-type pin hole (19) is opened on the outer peripheral wall of the other end of the second steel tube (18); The diagonal brace 1 (10) is used to form a diagonal brace structure between the steel column (1) and the ground.

2. The basement top plate returning device according to claim 1, characterized in that: The steel column (1) is an I-beam column; A second stiffening plate (5) is provided between the steel column (1) and the bottom plate (4); A stiffening plate 1 (2) is welded at every third section of the length of the steel column (1) from high to low in the vertical direction, and the three third sections from high to low in the vertical direction of the steel column (1) are respectively section 1, section 2 and section 3 of the steel column (1); A plurality of through holes (9) are evenly formed on the web and wing plates of the second segment and the web and wing plates of the third segment of the steel column (1).

3. The basement top plate returning device according to claim 2, characterized in that: The distance between two adjacent through holes (9) is 150 mm, and the diameter of the through holes (9) is 17 mm.

4. The basement top plate returning device according to claim 3, characterized in that: Also includes: The diagonal brace 2 (20) is shorter than the diagonal brace 1 (10); The diagonal brace 2 (20) comprises an outer tube 2 (21) and an inner tube 2 (22), wherein the inner tube 2 (22) extends into one end of the outer tube 2 (21) in a clearance fit manner, the axes of the outer tube 2 (21) and the inner tube 2 (22) coincide with each other, a plurality of pin connection holes 3 (23) are formed on the outer wall of the inner tube 2 (22) and are arranged equidistantly along the length direction thereof, and a pin connection hole 4 is formed on the outer peripheral wall of one end of the outer tube 2 (21); A circular steel sheet 3 is welded to the end wall of the other end of the outer tube 2 (21), one end of a steel tube 3 (24) is welded to the circular steel sheet 3, and a through-type pin hole 3 is opened on the outer peripheral wall of the other end of the steel tube 3 (24); A circular steel sheet 4 is welded to the end wall of the inner tube 2 (22) at the end extending out of the outer tube 2 (21), one end of a steel tube 4 (25) is welded to the circular steel sheet 4, and a through-type pin hole 4 is opened on the outer peripheral wall of the other end of the steel tube 4 (25); The second diagonal brace (20) is used to form a diagonal brace structure between the steel column (1) and the ground.

5. The basement top plate returning device according to claim 4, characterized in that: The distance between two adjacent pin-connecting holes (13) is smaller than the adjustment length of the bolt (7); The distance between two adjacent pin connection holes (23) is smaller than the adjustment length of the bolt (7).

6. The basement top plate returning device according to claim 5, characterized in that: The distance between two adjacent pin connection holes (13) is 100 mm.

7. The basement top plate returning device according to claim 6, characterized in that: Also includes: A connecting member (26) comprises a flat plate (27), on which two arc-shaped plates are symmetrically arranged in a horizontal direction, the two arc-shaped plates are arc-shaped plate 1 (28) and arc-shaped plate 2 (29), two through holes 1 (30) are respectively opened on both sides of the two arc-shaped plates, the two through holes 1 (30) are used to face the two through holes (9) respectively, and a pin hole 5 (31) and a pin hole 6 (32) are respectively opened on the arc-shaped plate 1 (28) and the arc-shaped plate 2 (29), and the pin hole 5 (31) and the pin hole 6 (32) are arranged to face each other; The connecting piece (26) is used to connect the steel column (1) with the first diagonal brace (10) or the second diagonal brace (20).

8. The basement top plate returning device according to claim 7, characterized in that: Also includes: A connecting shoe (33) comprises a bottom wall plate (34), wherein two sides of the bottom wall plate (34) are respectively provided with a first positioning plate (35) and a second positioning plate (36), wherein a seventh pin hole (37) and an eighth pin hole (38) are arranged side by side on the first positioning plate (35), and a ninth pin hole (39) and a tenth pin hole (40) are arranged side by side on the second positioning plate (36), wherein the seventh pin hole (37) and the ninth pin hole (39) are arranged opposite to each other, and the eighth pin hole (38) and the tenth pin hole (40) are arranged opposite to each other, and two through openings are arranged on the bottom wall plate (34); The connecting shoe (33) is used to connect the diagonal brace 1 (10) or the diagonal brace 2 (20) to the ground.

9. The basement top plate returning device according to claim 8, characterized in that: Also includes: Mini jack.

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