Large-span corridor and construction method thereof

Abstract

The invention relates to a large-span corridor and a construction method thereof.The large-span corridor is arranged between existing structures on the two sides, and the large-span corridor comprises a pair of frame beams connected to the existing structures on the two sides correspondingly; the at least two X-direction steel beams are connected between the pair of frame beams; the Y-direction steel beams are connected between the adjacent X-direction steel beams; a plurality of temporary supporting pieces are supported at the bottom of the large-span corridor. Each temporary supporting piece comprises a base arranged on the road surface below the large-span corridor and a plurality of supporting pieces, and the vertical jack is arranged at the top of the base and is used for supporting the large-span corridor. The temporary supporting system provided with the hydraulic jacks is arranged to support the beams of the corridor so as to offset internal stress of the steel beams, and therefore the steel corridor is prevented from downwarping, and therefore the situation that adjacent main body structure columns are inclined and deformed, and column bodies are cracked due to tension is avoided.

Description

Technical Field

[0001] The invention relates to the field of building construction, and in particular to a large-span corridor and a construction method thereof. Background Art

[0002] With the rapid development of my country's economy and society, the scale of large-scale commercial complexes is increasing. In order to meet the requirements of modern commercial functions, the corridor structure form is widely used in super high-rise buildings. In large-scale commercial steel structure corridor projects, in order to strengthen the connection between the steel corridor and the main structure on both sides and the overall connectivity, the rigid connection form will be preferred. However, for large-span steel corridors with steel connections at both ends of the building, the main beams of the steel corridors are often deflected due to their own stress and temperature changes, resulting in cracks or tilting. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a large-span corridor and a construction method thereof, which can prevent the steel corridor from deflecting and causing the adjacent main structure columns to tilt and deform and the column shaft to crack.

[0004] A long-span corridor is arranged between existing structures on both sides, and the long-span corridor comprises: a pair of frame beams, a pair of the frame beams are respectively connected to the existing structures on both sides; at least two X-direction steel beams connected between the pair of frame beams; a Y-direction steel beam connected between adjacent X-direction steel beams; the bottom of the long-span corridor is supported by a plurality of temporary support members, and the temporary support members comprise: a base arranged on the road surface below the long-span corridor; a vertical jack arranged on the top of the base for supporting the long-span corridor.

[0005] A further improvement of the present invention is that the base includes: a roadbed plate arranged on the road surface; a plurality of tower crane standard sections fixed to the upper surface of the roadbed plate, the plurality of tower crane standard sections are stacked into a whole along the height direction, and the vertical jack is arranged on the top of the uppermost tower crane standard section.

[0006] A further improvement of the present invention is that the large-span corridor is a multi-layer corridor structure formed by splicing multiple large-span corridor bodies layer by layer, and each layer of the large-span corridor body includes a pair of frame beams, at least two X-axis steel beams connected between the pair of frame beams, and a Y-axis steel beam connected between adjacent X-axis steel beams; Z-axis steel columns are connected between the X-axis steel beams of the large-span corridor bodies of adjacent layers, and the temporary support members are only supported at the bottom of the X-axis steel beams of the large-span corridor body of the bottom layer.

[0007] A further improvement of the present invention is that an expansion joint is reserved between the frame beam on one side and the existing structure.

[0008] A further improvement of the present invention is that each of the X-direction steel beams is connected by at least two sections, and the bottom of the connection between each two adjacent X-direction steel beam sections is supported by the temporary support member.

[0009] A further improvement of the present invention is that a horizontal jack for reinforcing the splicing is connected between each two adjacent X-direction steel beam sections.

[0010] A further improvement of the present invention is that it comprises the following steps:

[0011] S1. A plurality of temporary supports are arranged on the road surface below the long-span corridor corresponding to the design position of the X-direction steel beam and the span of the corridor;

[0012] S2. arranging frame beams on opposite sides of the existing structure at both sides, and arranging frame columns at the bottom of the frame beams to support the frame beams;

[0013] S3, connecting the two ends of each of the two X-direction steel beams to the frame beams on both sides, supporting the X-direction steel beams on the corresponding temporary support members, and fixing the Y-direction steel beams between adjacent X-direction steel beams;

[0014] S4. After the entire large-span corridor is installed and the settlement is stable, the temporary support members are removed.

[0015] A further improvement of the present invention is that the large-span corridor is a multi-layer corridor structure formed by splicing a plurality of large-span corridor bodies layer by layer. When constructing the multi-layer corridor structure, a Z-direction steel column is constructed on each of the X-direction steel beams, and the Z-direction steel column is used as a support to construct the second layer of the large-span corridor body, and this step is repeated until the construction of the multi-layer corridor structure is completed.

[0016] A further improvement of the present invention is that when the X-direction steel beams are constructed layer by layer, if the X-direction steel beams of the first layer deflect downward, the vertical jacks can be lifted to prevent the deflection.

[0017] A further improvement of the present invention is that when executing step S3, the X-direction steel beam is divided into multiple sections. During the sectioned construction, the first end of the first section of the X-direction steel beam is fixed to the frame beam on one side, and the second end is connected to the first temporary support member; the first end of the second section of the X-direction steel beam is connected to the second end of the first X-direction steel beam section, and the second end of the second section of the X-direction steel beam section is connected to the second temporary support member, until the second end of the last section of the X-direction steel beam is fixed to the frame beam on the other side to form the X-direction steel beam.

[0018] The present invention supports the beams of the corridor by setting up a temporary support system equipped with hydraulic jacks to offset the internal stress of the steel beams themselves, thereby preventing the steel corridor from deflecting and causing the adjacent main structure columns to tilt and deform, and the column body to crack. The stability of the corridor steel beams is enhanced through segmented construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the planar structure of the present invention;

[0020] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0021] Figure 3 This is a schematic diagram of the facade structure of the long-span corridor;

[0022] Figure 4 for Figure 3 A partial enlarged view of point B in the middle;

[0023] Figure 5 for Figure 3 A partial enlarged view of point C in the middle;

[0024] Figure 6 This is a structural schematic diagram of the large-span corridor of the present invention during construction;

[0025] Figure 7 It is a schematic diagram of the temporary support structure of the present invention;

[0026] Figure 8 Schematic diagram of the temporary support structure after deflection

[0027] Fig. 9 This is a side view of the temporary support after the horizontal jack is installed;

[0028] Fig.10 This is the front view of the temporary support after the horizontal jack is installed;

[0029] Fig.11 This is a schematic diagram of the construction of the first X-direction steel beam of the large-span corridor of the present invention;

[0030] Fig.12 This is a schematic diagram of the construction of the second X-direction steel beam of the large-span corridor of the present invention;

[0031] Fig.13 It is a plane diagram of the connection node between the X-axis steel beam and the frame beam;

[0032] Fig.14 This is a schematic elevation diagram of the connection node between the X-axis steel beam and the frame beam.

[0033] In the figure: 1. X-direction steel beam; 11. First X-direction steel beam section; 12. Second X-direction steel beam section; 13. Third X-direction steel beam section; 14. Fourth X-direction steel beam section; 2. Z-direction steel column; 3. Frame beam; 4. Y-direction steel beam; 5. Temporary support; 51. Standard section of tower crane; 52. Roadbed plate; 53. Vertical jack; 54. Support column; 55. High-strength bolt; 56. Steel structure; 57. First additional steel plate; 58. Horizontal jack; 59. Positioning code plate; 510. Auxiliary steel plate; 6. Expansion joint; 7. Frame column; 8. Diagonal brace; 9. Steel column; 10. Road surface; 15. Truck crane; 16. Cantilever structure; 17. Connection node; 18. Steel beam pre-construction section; 19. Second additional steel plate. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0035] like Figure 1 to Figure 14 As shown, the long-span corridor includes: a pair of frame beams 3, a pair of frame beams 3 are respectively connected to the existing structures on both sides; at least two X-direction steel beams 1 are connected between the pair of frame beams 3; a Y-direction steel beam 4 is connected between adjacent X-direction steel beams 1; the bottom of the long-span corridor is supported by a number of temporary support members 5, and the temporary support members 5 include: a base arranged on the road surface below the long-span corridor; a vertical jack 53 arranged on the top of the base for supporting the long-span corridor.

[0036] like Figures 7-8 As shown, the base includes: a roadbed 52 arranged on the road surface 10; a plurality of tower crane standard sections 51 arranged on the upper surface of the roadbed 52, the plurality of tower crane standard sections 51 are stacked into a whole along the height direction, and a vertical jack 53 is placed on the top of the uppermost tower crane standard section 51.

[0037] Preferably, if Figures 7-8 As shown, in this embodiment, a plurality of support columns 54 are further provided on the top of the uppermost tower crane standard section 51 . The support columns 54 are arranged around the vertical jacks 53 and support the X-direction steel beam 1 together with the vertical jacks 53 .

[0038] Preferably, if Figures 7-8 As shown, in this embodiment, a standard tower crane section 51 is used. The corresponding number of standard tower crane sections 51 can be selected according to the construction height of the long-span corridor. When the standard tower crane sections 51 are stacked to a height-to-width ratio greater than 3, anti-overturning measures need to be added, such as adding inclined supports, wire rope tie-ups, etc.

[0039] Preferably, if Figures 7-8 As shown, in this embodiment, a steel structure 56 is fixed above the standard section of the tower crane, and a vertical jack 53 and a support column 54 are located above the steel structure 56 .

[0040] Preferably, if Figures 7-8 As shown, the steel structure 56 is connected to the top surface of the tower crane standard section 51 through high-strength bolts 55.

[0041] like Figure 1 , Figure 3 As shown, there are multiple large-span corridor bodies, and the large-span corridor is a multi-layer corridor structure formed by splicing multiple layers of corridor bodies layer by layer. Z-axis steel columns 2 are connected between adjacent layers of the large-span corridor bodies, and the top of the Z-axis steel column 2 is connected to the X-axis steel beam 1 of the upper layer, and the bottom is connected to the X-axis steel beam 1 of the lower layer. Temporary support members 5 are supported on the bottom of the X-axis steel beam 1 of the bottom layer.

[0042] Preferably, the X-direction steel beam in this embodiment is a box beam.

[0043] Preferably, if Figure 3 As shown, in this embodiment, diagonal braces 8 are connected between the X-direction steel beams of the first layer and the X-direction steel beams of the second layer to further strengthen the structure.

[0044] Preferably, if Figure 3 As shown, in this embodiment, the frame column 7 is supported by the frame beam 3 , and a steel column 9 is fixed to the bottom of the frame column 7 , and the steel column 9 extends into the ground to further reinforce the frame column 7 .

[0045] Preferably, if Figure 1 As shown, in this embodiment, the Y-direction steel beam extends outward from the X-direction steel beam to form a cantilever structure 16 .

[0046] like Figure 1 , Figure 3 As shown, an expansion joint 6 is reserved between the frame beam 3 on one side and the existing structure, the frame beam 3 on the other side is connected and fixed to the existing structure, and the frame column 7 is supported at the bottom of the frame beam 3 .

[0047] like Fig.11 , 12 As shown, an X-direction steel beam 1 is divided into at least two sections, and the temporary support member 6 is supported at the connection between two adjacent X-direction steel beam sections.

[0048] Preferably, in this embodiment, an X-direction steel beam 1 is divided into two sections, the first X-direction steel beam 1 of the first layer is divided into a first X-direction steel beam section 11 and a second X-direction steel beam section 12, and the second X-direction steel beam 1 of the first layer is divided into a third X-direction steel beam section 13 and a fourth X-direction steel beam section 14.

[0049] Preferably, the segmentation of the upper and lower X-direction steel beam sections should be staggered to improve the stability of the overall structure.

[0050] like Fig. 9 , Fig.10As shown, an outwardly cantilevered auxiliary steel plate 510 is provided at the connection between two adjacent X-direction steel beam sections, and the direction of the auxiliary steel plate 510 is perpendicular to the length direction of the X-direction steel beam 1. A horizontal jack 58 is provided between the auxiliary steel plates 510 of the two adjacent X-direction steel beam sections 1. By setting the horizontal jack 58, the connection between the X-direction steel beam sections can be further reinforced.

[0051] Preferably, the horizontal jacks 58 in this embodiment are installed on the top and side surfaces of the connection between adjacent X-direction steel beam sections. The horizontal jacks 58 located on the side can weld anti-falling steel plates on the side of the X-direction steel beam 1 to prevent the jacks from falling. The distance between the end surface and the end of the steel beam is not less than 1 / 2 of the size of the hydraulic jack itself. All jacks need to provide initial prestressing according to calculations. During the steel beam hoisting, welding and temperature change process, pre-pressure needs to be provided in real time to eliminate the internal stress of the steel beam itself. For large-span steel corridor structures with three floors or more, it is only necessary to install horizontal jacks 58 on the top and side surfaces of the steel beam sections on both sides of the connection to offset the horizontal thrust of the X-direction steel beam 1 itself, and prevent the steel corridor from deflecting and causing the adjacent main structure columns to tilt and deform, and the column body to crack. When the steel beams of this layer are permanently fixed and connected, the horizontal jacks 58 can be withdrawn.

[0052] Preferably, the vertical jack 53 and the horizontal jack 58 in this embodiment are both hydraulic jacks, and the hydraulic jacks are externally connected to a hydraulic station (including a prestressed oil pump) to provide prestress for supplementation, thereby compensating for the deflection of the steel beam through the jacking and tensioning process to achieve the effect of overall force balance.

[0053] Preferably, in this embodiment, a hanging hole is opened on the auxiliary steel plate 510 .

[0054] Preferably, if Fig. 9 , Fig.10 As shown, in this embodiment, a positioning code plate 59 is welded at the connection between two steel beam sections, one side of the positioning code plate 59 is fixed to one steel beam section, and the other side is fixed to the other steel beam section to strengthen the connection between adjacent steel beam sections.

[0055] Preferably, if Figure 2 As shown, in this embodiment, a plurality of connection nodes 17 are provided on the frame beam 3 , and the X-axis steel beam 1 is connected to the connection nodes 17 .

[0056] Preferably, if Fig.13 , 14 As shown, a steel beam pre-construction section 18 is provided at the connection node 17 in the direction of the X-direction steel beam 1, and both ends of the X-direction steel beam 1 are connected to the steel beam pre-construction section 18 on both sides. A second additional steel plate 19 is welded at the connection between the steel beam pre-construction section 18 and the X-direction steel beam 1.

[0057] like Figure 1 to Figure 14As shown, a construction method of a large-span corridor of the present invention comprises the following steps:

[0058] S1. Set up a number of temporary supports 5 on the road surface below the long-span corridor corresponding to the design position of the X-direction steel beam 1 and the span of the corridor;

[0059] S2. Frame beams 3 are respectively arranged on opposite sides of the existing structure at both sides, and frame columns 7 are arranged at the bottom of the frame beams 3 to support the frame beams 3;

[0060] S3, connecting the two ends of at least two X-direction steel beams 1 to the frame beams 3 on both sides respectively, supporting the X-direction steel beams 1 on temporary supports 5, and fixing a plurality of Y-direction steel beams 4 between adjacent X-direction steel beams 1;

[0061] S4. After the entire large-span corridor is installed and the settlement is stable, the temporary support members 5 are removed.

[0062] Preferably, in this embodiment, a truck crane 15 is used for lifting construction.

[0063] Preferably, the large-span corridor is a multi-layer corridor structure formed by splicing multiple layers of large-span corridor bodies layer by layer. When constructing the multi-layer corridor structure, a number of Z-direction steel columns 2 are constructed on each X-direction steel beam 1, and the second-layer large-span corridor body is constructed with the Z-direction steel columns 2 as support. This step is repeated until the construction of the multi-layer corridor structure is completed.

[0064] Preferably, the multi-story corridor structure in the present embodiment has multi-story large-span corridor bodies, and each large-span corridor body has two X-direction steel beams 1. During construction, the automobile crane 15 is moved between the two X-direction steel beams 1, and the first X-direction steel beam of the first layer is constructed first, and the Z-direction steel column 2 is constructed on the first X-direction steel beam, and the Z-direction steel column 2 is used as a support to construct the first X-direction steel beam of the second layer directly above the first X-direction steel beam of the first layer. This step is repeated until the first X-direction steel beam of each layer is completed. At this time, it is only necessary to turn the direction of the automobile crane, and repeat the construction of the second X-direction steel beam of each layer, and connect the first X-direction steel beam and the second X-direction steel beam of each layer through the Y-direction steel beam. Construction is carried out in this order, and the X-direction steel beams on one side are first constructed, and then the X-direction steel beams on the other side are constructed. The number of times the automobile crane 15 moves back and forth and turns can be reduced, thereby speeding up the progress of construction.

[0065] like Figure 8 As shown, when the X-direction steel beams 1 are constructed layer by layer, if the X-direction steel beams 1 of the first layer deflect downward, the vertical jacks 53 can be lifted to prevent the deflection.

[0066] Preferably, if Figure 8As shown, in this embodiment, after the vertical jack 53 is lifted, in order to ensure the supporting effect of the support column 54 , a first additional steel plate 57 is padded at the bottom of the support column 54 .

[0067] like Fig.11 , 12 As shown, when executing step S3, the X-direction steel beam 1 can be divided into multiple sections. In this embodiment, an X-direction steel beam 1 is divided into two sections. During the segmented construction, the first end of the first X-direction steel beam section 11 is fixed to the frame beam 3 on one side, and the second end is connected to the first temporary support 5; the first end of the second steel beam section 12 is connected to the second end of the first steel beam section 11, and the second end of the second steel beam section 12 is connected to the second temporary support 5, until the second end of the last steel beam section is fixed to the frame beam 3 on the other side to form the X-direction steel beam 1.

[0068] Preferably, in this embodiment, during construction, after the large-span corridor body of the first floor is hoisted, horizontal and vertical positioning calibration is carried out, and after the calibration is completed, permanent welding connection is carried out. The upper and lower floors need to wait until the horizontal and vertical components of the upper floor are calibrated before permanent welding connection is carried out.

[0069] like Figure 1 to Figure 14 As shown, when executing step S2, an expansion joint 6 is opened between the structural beam 3 on one side and the existing structure to provide space for horizontal expansion and contraction of the large-span corridor to prevent structural cracks or damage when it expands and contracts due to climate temperature changes.

[0070] Preferably, during construction of this embodiment, the frame columns 7 need to be slightly tilted toward the corridor side when the steel corridor is constructed in winter or when the temperature is low, and need to be slightly tilted away from the corridor side when the steel corridor is constructed in summer or when the temperature is high.

[0071] Preferably, in this embodiment, the connection node 17 is firmly connected to the X-direction steel beam 1 by V-shaped welding. Considering that the X-direction steel beam 1 is rigidly connected in both directions, its own distributed stress is larger than that of the hinged and sliding connections. In order to prevent X-direction tensile cracking damage at the segmented connection position of the X-direction steel beam 1, its segmented position needs to be optimized. This patent optimizes the connection method of the segmented position of the above-mentioned steel box beam, optimizes and adjusts the steel beam pre-construction section 18, adjusts the size of the added connecting steel plate to perform corner joint welding with the end of the X-direction steel beam 1, and directly performs Y-shaped welding with the steel beam pre-construction section 18 to reduce a welding seam and eliminate the risk of Z-direction tensile cracking at the segmented position.

[0072] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A long-span corridor, located between existing structures on both sides, characterized in that: The long-span corridor includes: a pair of frame beams, a pair of the frame beams are respectively connected to the existing structures on both sides; at least two X-direction steel beams connected between the pair of frame beams; a Y-direction steel beam connected between adjacent X-direction steel beams; the bottom of the long-span corridor is supported by a number of temporary support members, and the temporary support members include: a base arranged on the road surface below the long-span corridor; a vertical jack arranged on the top of the base for supporting the long-span corridor.

2. The long-span corridor according to claim 1, characterized in that: The base comprises: a roadbed plate arranged on the road surface; a plurality of tower crane standard sections fixed on the upper surface of the roadbed plate, wherein the plurality of tower crane standard sections are stacked into a whole along the height direction, and the vertical jack is arranged on the top of the uppermost tower crane standard section.

3. The long-span corridor according to claim 1, characterized in that: The large-span corridor is a multi-layer corridor structure formed by splicing multiple large-span corridor bodies layer by layer. Each layer of the large-span corridor body includes a pair of frame beams, at least two X-direction steel beams connected between the pair of frame beams, and a Y-direction steel beam connected between adjacent X-direction steel beams; Z-direction steel columns are connected between the X-direction steel beams of the large-span corridor bodies of adjacent layers, and the temporary support members are only supported at the bottom of the X-direction steel beams of the large-span corridor body of the bottom layer.

4. The long-span corridor according to claim 1, characterized in that: An expansion joint is reserved between the frame beam on one side and the existing structure.

5. The long-span corridor according to claim 1, characterized in that: Each of the X-direction steel beams is connected by at least two sections, and the bottom of the connection between each two adjacent X-direction steel beam sections is supported by the temporary support member.

6. The long-span corridor according to claim 5, characterized in that: Each adjacent two X-direction steel beam sections are also connected with a horizontal jack for reinforcing the splicing.

7. A construction method for a long-span corridor as claimed in any one of claims 1 to 6, characterized in that: The steps include: S1. A plurality of temporary supports are arranged on the road surface below the long-span corridor corresponding to the design position of the X-direction steel beam and the span of the corridor; S2. arranging frame beams on opposite sides of the existing structure at both sides, and arranging frame columns at the bottom of the frame beams to support the frame beams; S3, connecting the two ends of each X-direction steel beam to the frame beams on both sides respectively, supporting the X-direction steel beam on the corresponding temporary support member, and fixing the Y-direction steel beam between each adjacent X-direction steel beam; S4. After the entire large-span corridor is installed and the settlement is stable, the temporary support members are removed.

8. The construction method of the long-span corridor according to claim 7, characterized in that: The large-span corridor is a multi-layer corridor structure formed by splicing multiple large-span corridor bodies layer by layer. When constructing the multi-layer corridor structure, Z-direction steel columns are constructed on each of the X-direction steel beams, and the second layer of the large-span corridor body is constructed with the Z-direction steel columns as support. This step is repeated until the construction of the multi-layer corridor structure is completed.

9. The construction method of the long-span corridor according to claim 7, characterized in that: When the X-direction steel beams are constructed layer by layer, if the X-direction steel beams of the first layer deflect downward, the vertical jacks can be lifted to prevent the deflection.

10. The construction method of the long-span corridor according to claim 7, characterized in that: When executing step S3, the X-direction steel beam is divided into multiple sections. During the segmented construction, the first end of the first X-direction steel beam section is fixed to the frame beam on one side, and the second end is connected to the first temporary support member; the first end of the second X-direction steel beam section is connected to the second end of the first X-direction steel beam section, and the second end of the second X-direction steel beam section is connected to the second temporary support member, until the second end of the last X-direction steel beam section is fixed to the frame beam on the other side to form the X-direction steel beam.

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