Assembling method for multi-ring asynchronous assembled flat-top large-block type subway station

Abstract

The invention provides an assembly method for a multi-ring asynchronous assembled flat-top large-block type subway station, and relates to the field of assembly type building construction.The assembly method comprises the steps that a building is decomposed, multiple groups of ring beam prefabricated parts formed by mutual splicing are included, the building is decomposed into multiple module pre-components formed by mutual splicing of single bodies, and the adjacent module pre-components are connected through the ring beam prefabricated parts; according to the decomposed module prefabricated parts, the prefabricated parts are poured, embedded parts used for positioning, connecting and hoisting are embedded in the connecting positions, the prefabricated parts are hoisted into a foundation pit after being formed, the prefabricated parts on the lower layer are spliced in advance, finally, the prefabricated parts spliced with one another on the upper layer are installed, and annular splicing is completed by circularly advancing. According to the construction method of the flat-topped large-block subway station, by adopting a flat-topped large-block fabricated subway station structure, the excavation depth of a foundation pit can be reduced, connecting gaps can be reduced, the waterproof capacity and integrity of the fabricated subway station can be enhanced, the construction period can be shortened, and the advantages of green and low carbon of the fabricated structure can be further highlighted.

Description

Technical Field

[0001] The invention relates to the technical field of prefabricated building construction, and in particular to an assembly method for a multi-ring asynchronously assembled flat-top large-block subway station. Background Art

[0002] With the increasing demand for urban development, prefabricated subway stations are gradually being used in the field of urban rail transit construction due to their green, low-carbon and short construction period characteristics.

[0003] At present, most of the prefabricated components of the prefabricated subway stations that have been completed are small in size, with many joint gaps, complex construction procedures, and relatively poor waterproofing and structural integrity. At the same time, due to the "arc-shaped" structural characteristics of the top and bottom plates of traditional prefabricated subway stations, the foundation pit usually requires a larger excavation depth to meet the structural requirements of the "arc-top" prefabricated station. Due to the continuous development of heavy machinery and equipment, the ability to lift and install large-mass prefabricated components is now available; and as the research on prefabricated subway stations continues to deepen, the structural form of prefabricated subway stations needs to be optimized. Based on this, a flat-top large-block prefabricated subway station structure is proposed.

[0004] However, the current assembly construction of flat-top large-block subway stations has the problem of large risk of posture conversion of large-volume prefabricated components and unstable state of single-ring structure. Therefore, it is urgent to provide an assembly method for the flat-top large-block assembled subway station structure. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a method for assembling a flat-top large-block subway station with multi-ring asynchronous assembly, which improves the current situation of traditional assembled subway stations with small structural components, many splicing gaps, complicated construction procedures, poor waterproofing and structural integrity, and a greater excavation depth required for the construction pit. It also solves the problems of high risk of posture conversion of large-volume prefabricated components and unstable state of single-ring structures to a certain extent.

[0006] Technical Solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: A method for assembling a multi-ring asynchronously assembled flat-top large-block subway station comprises the following steps:

[0008] Step 1, decomposing the building into a plurality of groups of ring beam prefabricated components spliced ​​together, decomposing the building into a plurality of module prefabricated components spliced ​​together, and adjacent module prefabricated components are connected by ring beam prefabricated components;

[0009] Step 2, casting prefabricated components according to the decomposed module prefabricated components, and pre-embedded parts for positioning, connection and hoisting at the connection positions;

[0010] Step 3, hoisting the prefabricated components into the foundation pit after forming;

[0011] Step 4, advance the splicing of the prefabricated components of the lower layer, and finally install the prefabricated components of the upper layer spliced ​​together, and proceed in a circular manner to complete the annular splicing;

[0012] Step 5: injecting caulking material into the joints of each prefabricated component.

[0013] Furthermore, in step 6, the spatial position of the prefabricated component in step 1 and step 2 is moved at most once in posture conversion.

[0014] Furthermore, the modular prefabricated components of the multiple monomers spliced ​​together in step 1 include at least five prefabricated components, namely, a bottom plate, a side wall, a center column, a middle plate and a top plate, and the ring beam modules are connected into a load-bearing whole through a bottom longitudinal beam, a middle longitudinal beam and a top longitudinal beam.

[0015] Furthermore, step 4 also includes the assembly of the bottom plate ahead of the bottom longitudinal beam, followed by the assembly of the center column and the side wall, then the assembly of the center longitudinal beam, followed by the assembly of the center plate, then the assembly of the top longitudinal beam, and finally the assembly of the lagging ring top plate.

[0016] Furthermore, after the prefabricated bottom components are installed in advance in step 4, auxiliary support needs to be provided to the side walls.

[0017] Furthermore, step 6 includes using mechanical equipment to transform the posture of the bottom plate components after they are prefabricated, and using mechanical equipment to transform the posture of the side wall and center column components after they are prefabricated. The middle plate, top plate, bottom longitudinal beam, middle longitudinal beam and top longitudinal beam do not need to be transformed after they are prefabricated.

[0018] Furthermore, step 3 includes temporarily storing the top plate components at the assembly site through steel supports, and temporarily storing the bottom plate, side walls, center columns, middle plates, bottom longitudinal beams and top longitudinal beams at the assembly site through wooden planks.

[0019] The beneficial effects of the present invention are:

[0020] 1. This flat-top large-block subway station construction method, by adopting a flat-top large-block prefabricated subway station structure, can reduce the excavation depth of the foundation pit, reduce the connection gap, enhance the waterproof ability and integrity of the prefabricated subway station, and shorten the construction period, further highlighting the green and low-carbon advantages of the prefabricated structure.

[0021] 2. The flat-top large-block subway station construction method can complete the transportation and storage of the flat-top large-block prefabricated components by setting a posture conversion at most once, thereby reducing the adverse effects of the posture conversion process on the prefabricated components.

[0022] 3. The construction method of the flat-top large-block subway station can realize the reasonable and orderly assembly of each prefabricated component through the multi-ring asynchronous assembly scheme, and after gradually completing the closed-loop assembly of the lagging non-ring structure system, a single-ring stable force-bearing structure can be formed. This assembly method can take into account both the assembly efficiency and the stability of the assembled structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the construction process of a flat-top large-block subway station with multiple-ring asynchronous assembly provided by an example of the present invention;

[0024] Figure 2 A schematic diagram of a limit screw device for a flat-top large-block subway station side wall and its (outer upper) auxiliary embedded parts provided by an example of the present invention;

[0025] Figure 3 A schematic diagram of a flat-top large-block subway station side wall and its (inner lower part) auxiliary embedded part limiting steel plate device provided by an example of the present invention;

[0026] Figure 4 A schematic diagram of the demoulding and lifting posture of the flat-top large-block subway station floor provided by an example of the present invention;

[0027] Figure 5 A schematic diagram of the transportation, temporary storage and assembly lifting posture of a flat-top large-block subway station floor provided by an example of the present invention;

[0028] Figure 6 A schematic diagram of the demoulding, lifting, transportation, temporary storage and assembly lifting posture of the flat-top large-block subway station roof provided by the example of the present invention;

[0029] Figure 7 A schematic diagram of a temporary storage solution for a flat-top large-block subway station roof provided by an example of the present invention;

[0030] Figure 8 A schematic diagram of the demoulding, lifting, transportation, temporary storage and assembly lifting posture of the central column of a flat-top large-block subway station provided by an example of the present invention;

[0031] Fig. 9 A schematic diagram of the transformation of the central column assembly and hoisting to the assembly position in the flat-top large-block subway station provided by the example of the present invention;

[0032] Fig.10 A schematic diagram of the assembly posture of the central column of a flat-top large-block subway station provided by an example of the present invention;

[0033] Fig.11 A schematic diagram of the demoulding, lifting, transportation, temporary storage and assembly lifting posture of the flat-top large-block subway station side wall provided by the example of the present invention;

[0034] Fig.12 A schematic diagram of the transition from hoisting to assembly position of the side wall of a flat-top large-block subway station provided by an example of the present invention;

[0035] Fig.13 A schematic diagram of the assembly posture of the side wall of a flat-top large-block subway station provided by an example of the present invention;

[0036] Fig.14 A schematic diagram of the overall structure of a flat-top large-block subway station provided by an example of the present invention;

[0037] Fig.15 A schematic diagram of multi-ring asynchronous assembly of a flat-top large-block subway station provided by an example of the present invention.

[0038] Among them, 1. top plate; 2. top longitudinal beam; 3. side wall; 4. middle longitudinal beam; 5. middle plate; 6. middle column; 7. bottom longitudinal beam; 8. bottom plate; 9. limit screw device; 10. limit steel plate device; 15. lifting device; 16. enclosure structure; 11. top plate embedded nails; 12. top plate reserved steel bar fastening holes; 13. top plate reserved mortise and tenon groove; 14. temporary steel bracket; 31. side wall embedded nails; 33. side wall reserved steel bar fastening holes 34. The inner side bracket structure of the side wall; 62. The embedded hanging nails of the center column; 63. The flange connection device of the center column; 64. The four-way bracket structure of the center column; 83. The reserved steel bar fastening holes in the bottom plate; 84. The reserved mortise and tenon grooves in the bottom plate; 92. The steel bottom plate of the limit screw device; 93. The threaded sleeve of the limit screw device; 95. The movable screw of the limit screw device; 101. The embedded bolts of the limit steel plate device; 102. The steel plate with holes of the limit steel plate device. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 1-12 , a method for assembling a flat-top large-block subway station with multi-ring asynchronous assembly, step 1, decomposing a building, and a plurality of groups of ring beam prefabricated components spliced ​​together, decomposing the building into a plurality of monomer module prefabricated components spliced ​​together, and adjacent module prefabricated components are connected by ring beam prefabricated components;

[0041] Step 2, casting prefabricated components according to the decomposed module prefabricated components, and pre-embedded parts for positioning, connection and hoisting at the connection positions;

[0042] Step 3, hoisting the prefabricated components into the foundation pit after forming;

[0043] Step 4, advance the splicing of the prefabricated components of the lower layer, and finally install the prefabricated components of the upper layer spliced ​​together, and proceed in a circular manner to complete the annular splicing;

[0044] Step 5: injecting caulking material into the joints of each prefabricated component.

[0045] The modular prefabricated components of multiple monomers spliced ​​together in step 1 include at least five prefabricated components: a bottom plate 8, a side wall 3, a center column 6, a middle plate 5 and a top plate 1. The ring beam modules are connected to form a load-bearing whole through a bottom longitudinal beam 7, a middle longitudinal beam 4 and a top longitudinal beam 2.

[0046] Step 6: The prefabricated component in steps 1 and 2 is moved in space with at most one posture transformation.

[0047] Step 6 includes: after the base plate 8 is prefabricated, the prefabricated components are transformed into a posture using mechanical equipment. For the base plate 8, its demoulding lifting posture is as follows: Figure 4 The lifting device 15 is connected to the pre-buried lifting nails of the bottom plate through a steel wire rope. After lifting, it undergoes a posture conversion and completes a 180° flip up and down to achieve the following Figure 5 In the posture shown, the lifting device 15 is connected to the pre-embedded nails of the bottom plate through a steel wire rope to complete the subsequent transportation, temporary storage and assembly process. During the transportation and temporary storage process, wooden square pads are placed between the bottom surface of the prefabricated component of the bottom plate 8 and the supporting plane.

[0048] After the side wall 3 and the center column 6 are prefabricated, the prefabricated components are transformed by mechanical equipment. The middle plate 5, the top plate 1, the bottom longitudinal beam 7, the middle longitudinal beam 4 and the top longitudinal beam 2 do not need to be transformed after prefabrication. For the top plate 1, its demoulding, transportation, temporary storage and assembly lifting posture are the same as Figure 6 As shown, no posture conversion is required. The lifting device 15 is connected to the top plate pre-embedded nails 11 through a steel wire rope to complete the demoulding, transportation, temporary storage and assembly processes. During the transportation and temporary storage process, a temporary steel bracket 14 is placed between the bottom surface of the top plate 1 prefabricated component and the supporting plane, as shown in FIG. Figure 7 shown.

[0049] The lifting postures for demoulding, transportation and temporary storage of the center column 6 and the side wall 3 are as follows: Figure 8 and Fig.11As shown. Similarly, the lifting device 15 is connected to the pre-embedded hanging nails 62 of the center column and the pre-embedded hanging nails 31 of the side wall respectively through steel wire ropes. During the assembly process, taking the center column 6 as an example, the lifting device 15 is simultaneously connected to the pre-embedded hanging nails 62 of the center column on both sides through steel wire ropes; when lifting, the steel wire ropes connected to the pre-embedded hanging nails 62 of the center column are first subjected to force to realize the lifting operation; then, the steel wire ropes of the pre-embedded hanging nails 62 of the center column on one side are gradually extended to realize the aerial posture conversion; finally, after the steel wire ropes connected to the pre-embedded hanging nails 62 of the center column are fully stressed, the steel wire ropes of the pre-embedded hanging nails 62 of the center column are released to complete the posture conversion of the center column 6. The schematic diagrams of the aerial posture conversion schemes of the center column 6 and the side wall 3 are shown as follows. Fig. 9 and Fig.12 As shown, the assembly postures are as follows Fig.10 and Fig.13 shown.

[0050] After at most one spatial position shift of posture conversion, each prefabricated component has the assembly posture. Different from the traditional "arc-top" prefabricated subway station construction ring-by-ring advancement scheme, the flat-top large-block subway station assembly process adopts a multi-ring asynchronous assembly scheme.

[0051] The traditional flat-top subway station structure is decomposed into a multi-ring modular structure, and each ring structure is divided into at least five prefabricated components, namely, the bottom plate 8, the side wall 3, the middle column 6, the middle plate 5 and the top plate 1, so that the size of a single prefabricated component is larger than that of the traditional prefabricated station structure. The "large block prefabricated component" can effectively reduce the number of assembly joints of the prefabricated station and improve the integrity and waterproofing ability. In addition, compared with the traditional "arc-top" prefabricated station structure, the flat-top large block subway station structure can effectively reduce the amount of foundation pit excavation engineering, but each ring needs to be connected by the bottom longitudinal beam 7, the middle longitudinal beam 4 and the top longitudinal beam 2 to form a force-bearing whole.

[0052] Step 4 also includes the assembly of the bottom plate 8 ahead of the bottom longitudinal beam 7, followed by the assembly of the middle column 6 and the side wall 3, and then the assembly of the middle longitudinal beam 4, followed by the assembly of the middle plate 5, followed by the assembly of the top longitudinal beam 2, and finally the assembly of the lagging ring top plate 1. First, through the lifting device 15, starting from the starting end, the assembly of multiple rings of bottom plates 8 is completed continuously. After each prefabricated component of the bottom plate 8 is assembled in place, it is fastened and positioned through the reserved steel bar fastening channel 83 of the bottom plate; then, the bottom longitudinal beam 7 is hoisted at the reserved mortise and tenon 84 position of the bottom plate to complete the assembly in place.

[0053] Secondly, on the left and right sides of the assembled bottom plate 8, as shown in FIG. Fig.14 After each prefabricated component of the side wall 3 is assembled in place, the pre-buried limit screw device 9 and the limit steel plate device 10 are used to press Figure 2 and Figure 3The scheme shown completes the temporary stabilization of the side wall 3, and completes the fastening and positioning through the reserved steel bar fastening holes 33 in the side wall. On the assembled bottom longitudinal beam 7, starting from the starting end, the central column 6 is hoisted and assembled, and connected to the bottom longitudinal beam 7 through the central column flange connection device 63 to complete the fastening and positioning. After the two central columns 6 are assembled in place, the central longitudinal beam 4 is hoisted, and the central longitudinal beam 4 is fastened and positioned through the central column four-way bracket structure 64 on the central column 6. After the central longitudinal beam 4 and the side wall 3 are assembled in place, the middle plate 5 is hoisted, and the middle plate 5 is fastened and positioned through the side wall inner bracket structure 34 on the side wall 3 and the central column four-way bracket structure 64 on the central column 6.

[0054] The pre-embedded limit steel plate device 10 of the flat-top large block prefabricated component is as follows Figure 3 As shown, it has the ability to limit the relative displacement and relative rotation angle between the side wall 3 and the bottom plate 8. Among them, the limiting steel plate device 10 includes a limiting steel plate device embedded bolt 101 and a limiting steel plate device with a hole 102. The limiting steel plate device embedded bolt 101 is placed at the appropriate position of the side wall 3 and the bottom plate 8, and the limiting function is realized by the limiting steel plate device with a hole 102.

[0055] Finally, the hysteresis ring is used to assemble the top longitudinal beam 2 and the top plate 1. The top longitudinal beam 2 is hoisted by the lifting device 15, and connected to the top longitudinal beam 2 by the center column flange connection device 63 to complete the fastening and positioning. On the assembled top longitudinal beam 2, starting from the starting end, the top plate 1 is assembled ring by ring. The prefabricated components of the top plate 1 are mechanically engaged with the top longitudinal beam 2 through the reserved mortise and tenon grooves 13 of the top plate, and are fastened and positioned through the reserved steel bar fastening holes 12 of the top plate. When the hysteresis ring completes the stable annular structure system, the bottom plate 8 continues to be assembled in advance, and the above three steps are repeated. Fig.15 shown.

[0056] After the prefabricated bottom components are installed in advance in step 4, auxiliary support is required for the side wall 3. The embedded limit screw device 9 is as shown in FIG. Figure 2 As shown, it has the ability to extend outward and retract inward, and can be firmly connected with the anchoring structure provided on the outer foundation pit retaining structure 16.

[0057] Among them, the anchoring structure includes steel bars, a steel bottom plate 92 of a limit screw device, and a threaded sleeve 93 of a limit screw device. Steel bars are embedded in the corresponding position of the enclosure structure 16, and the steel bottom plate 92 of the limit screw device is connected. The threaded sleeve 93 of the limit screw device is arranged on the steel bottom plate 92 of the limit screw device. Correspondingly, the limit screw device 9 of the side wall 3 includes embedded bolts, and the steel bottom plate 92 of the limit screw device and the threaded sleeve 93 of the limit screw device are arranged on the bolts. The movable screw 95 of the limit screw device is connected inside the threaded sleeve, and the limit function is realized by the cooperation between the movable screw 95 of the limit screw device and the threaded sleeve 93 of the limit screw device.

[0058] Step 3 includes temporarily storing the top plate 1 component at the assembly site through steel brackets, and temporarily storing the bottom plate 8, side wall 3, center column 6, middle plate 5, bottom longitudinal beam 7 and top longitudinal beam 2 at the assembly site through wooden planks.

[0059] It should be noted that, in this document, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0060] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for assembling a flat-top large-block subway station with multiple rings and asynchronous assembly, characterized in that: The following steps are involved: Step 1, decomposing the building into a plurality of groups of ring beam prefabricated components spliced ​​together, decomposing the building into a plurality of module prefabricated components spliced ​​together, and adjacent module prefabricated components are connected by ring beam prefabricated components; Step 2, casting prefabricated components according to the decomposed module prefabricated components, and pre-embedded parts for positioning, connection and hoisting at the connection positions; Step 3, hoisting the prefabricated components into the foundation pit after forming; Step 4, advance the splicing of the prefabricated components of the lower layer, and finally install the prefabricated components of the upper layer spliced ​​together, and proceed in a circular manner to complete the annular splicing; Step 5: injecting caulking material into the joints of each prefabricated component.

2. The method for assembling a flat-top large-block subway station with multiple-ring asynchronous assembly according to claim 1 is characterized by: The invention also includes step 6, wherein the prefabricated component in step 1 and step 2 is moved in space with at most one posture conversion.

3. The method for assembling a flat-top large-block subway station with multiple-ring asynchronous assembly according to claim 1 or 2, characterized in that: The modular prefabricated components of the plurality of monomers spliced ​​together in step 1 include at least five prefabricated components, namely, a bottom plate (8), a side wall (3), a center column (6), a middle plate (5) and a top plate (1), and the ring beam modules are connected to form a force-bearing whole through a bottom longitudinal beam (7), a middle longitudinal beam (4) and a top longitudinal beam (2).

4. The method for assembling a flat-top large-block subway station with multiple-ring asynchronous assembly according to claim 3 is characterized in that: The step 4 also includes the assembly of the bottom plate (8) ahead of the bottom longitudinal beam (7), followed by the assembly of the center column (6) and the side wall (3), and then the assembly of the center longitudinal beam (4), followed by the assembly of the middle plate (5), followed by the assembly of the top longitudinal beam (2), and finally the assembly of the lagging ring top plate (1).

5. The method for assembling a flat-top large-block subway station with multiple-ring asynchronous assembly according to claim 4 is characterized by: After the prefabricated bottom components are installed in advance in step 4, auxiliary support needs to be provided to the side walls (3).

6. The method for assembling a flat-top large-block subway station with multiple-ring asynchronous assembly according to claim 3 is characterized by: The step 6 comprises: After the base plate (8) component is prefabricated, the prefabricated component is transformed into a posture using mechanical equipment; After the side wall (3) and the center column (6) components are prefabricated, the prefabricated components are transformed in posture using mechanical equipment; The middle plate (5), the top plate (1), the bottom longitudinal beam (7), the middle longitudinal beam (4) and the top longitudinal beam (2) do not need to undergo posture conversion after being prefabricated.

7. The method for assembling a flat-top large-block subway station with multiple-ring asynchronous assembly according to claim 6 is characterized by: The step 3 includes temporarily storing the top plate (1) component at the assembly site via a steel support; The bottom plate (8), side wall (3), center column (6), middle plate (5), bottom longitudinal beam (7) and top longitudinal beam (2) are temporarily stored by means of wooden planks at the assembly site.

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