Suspended lifting type formwork system for cushion-free construction of reverse building method

Abstract

The utility model discloses a suspension lifting type formwork system for cushion-free construction in a reverse building method, which comprises a lower-layer structural beam plate formwork system positioned below an upper-layer structural beam plate of a basement, and a plurality of suspension rods which are connected to the lower-layer structural beam plate formwork system in a suspension manner and are distributed on the lower-layer structural beam plate formwork system in a row-column matrix manner, the upper end and the lower end of each suspender are detachably connected with nuts, the nuts are located above an upper-layer structural beam plate and below a lower-layer structural beam plate formwork system respectively, and power devices are arranged on the parts, located on the two sides, of the suspenders. And the power device is used for carrying out lifting adjustment on the lower-layer structure beam plate formwork system through a suspender connected with the power device. The structure can save cushion concrete materials, shorten the total construction period of the structural beam plate, reduce deformation of the foundation pit and guarantee the surrounding environment of the foundation pit.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering, in particular to a suspended lifting formwork system for reverse construction without cushion layer. Background Art

[0002] The reverse construction technology of underground engineering has been increasingly widely used because it can save temporary concrete support and has good effects on protecting the surrounding environment. In reverse construction projects in soft soil areas, in order to ensure the construction quality of horizontal underground structures, it is usually necessary to first cast a concrete cushion layer and then set up a frame formwork to cast concrete. Although the rigidity of the structural beams and slabs of the reverse construction method is greater than that of the temporary support of the forward construction method, which is beneficial to controlling the deformation of the foundation pit, the reverse construction method also has factors that are not conducive to controlling the deformation of the foundation pit, such as the need to over-excavate a certain depth of earth for the frame erection, and the long erection time of the structural beam and slab formwork. These concrete cushion layers need to be broken during subsequent excavation, so there is still a certain amount of material waste, and it also takes up a certain amount of engineering time. Therefore, how to save cushion layer concrete materials, reduce the time of formwork erection, reduce foundation pit deformation, and improve the protection effect on the surrounding environment through cushion-free construction technology has become a technical problem that needs to be solved in this field. Utility Model Content

[0003] The purpose of the utility model is to provide a suspended lifting formwork system for reverse construction without cushion layer, so as to solve the problems of waste of cushion layer construction materials, long rack erection period, large foundation pit deformation and poor environmental protection effect on the surrounding area.

[0004] In order to solve the above technical problems, the utility model provides a suspended lifting formwork system for reverse construction without cushion layer construction, including a lower structure beam and slab formwork system located below the upper structure beam and slab of the basement, and the structural plates dispersedly passing through the upper structure beam and slab are suspended and connected to a plurality of hangers distributed in a row and column matrix on the lower structure beam and slab formwork system, and the upper and lower ends of each of the hangers are detachably connected with nuts, and the nuts are respectively located above the upper structure beam and slab and below the lower structure beam and slab formwork system, and the hangers on the columns on both sides are provided with power devices, and the power devices are used to lift and lower the lower structure beam and slab formwork system through the hangers connected thereto.

[0005] Furthermore, in the suspended lifting formwork system provided by the utility model, the power device is provided on some of the hangers in the column where the middle part of the hangers distributed in the row and column matrix is ​​located.

[0006] Furthermore, in the suspended lifting formwork system provided by the utility model, the power devices are at least five arranged at the four corners and the middle of a plurality of suspension rods distributed in a row and column matrix.

[0007] Furthermore, in the suspended lifting formwork system provided by the utility model, the power devices are at least six arranged at the four corners and the middle of a plurality of suspension rods distributed in a row and column matrix.

[0008] Furthermore, in the suspended lifting formwork system provided by the utility model, the power device is located between the nut and the upper structure beam plate, including hydraulic jacks arranged on the upper structure beam plate on both sides of the hanger, and a steel beam arranged on the hydraulic jacks, the hanger passes through the steel beam, and the nut is against the upper surface of the steel beam.

[0009] Furthermore, the suspended lifting formwork system provided by the utility model comprises a power device including hydraulic jacks located on both sides of a hanger and arranged on an upper structure beam plate, a steel beam arranged on the hydraulic jacks, the hanger passes through the steel beam, and the upper end of the hanger is connected to two nuts, which respectively abut against the upper surface of the steel beam and the upper structure beam plate.

[0010] Furthermore, in the suspended lifting formwork system provided by the utility model, the power device is a motor, and the motor is connected to the corresponding suspension rod through a worm gear mechanism.

[0011] Furthermore, in the suspended lifting formwork system provided by the utility model, the power device is a winch, and the suspension rod connected to the power device is replaced by a chain.

[0012] Furthermore, the utility model provides a suspended lifting formwork system, wherein the lower structure beam and slab formwork system includes a formwork that matches the facade shape of the lower structure beam and slab, the formwork having a low-end lower surface and a high-end lower surface, a secondary keel below the formwork, wooden planks arranged between the low-end lower surface of the formwork and the secondary keel, a main keel vertically attached to the lower surface of the secondary keel, tie bolts connected to the structural beam of the formwork, and vertical poles arranged between the high-end lower surface of the formwork and the secondary keel.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] The suspended lifting formwork system for reverse construction without cushion layer provided by the utility model is suitable for reverse construction of basement structure. The lower structure beam and slab formwork system is suspended and connected by the hangers distributed in a row and column matrix and the nuts at both ends under the completed upper structure beam and slab, and the lower structure beam and slab formwork system is lifted and lowered by the power device on some hangers, so that the suspension height of the lower structure beam and slab formwork system relative to the upper structure beam and slab is adjusted by the power device, and the floor height between the upper and lower structure beam and slab can be accurately controlled. The lower structure beam and slab is formed by tying the beam and slab steel bars on the lower structure beam and slab formwork system and pouring concrete. When pouring the lower structure beam and slab, the pouring load is borne by the hangers, so that the concrete cushion layer can be avoided, the cushion layer concrete material is saved, and it is green and efficient. Compared with the sequential construction method for constructing the structural beams and slabs of the basement structure, the sequential construction method reduces the time for erecting the frames and the structural beam and slab formwork system, avoids the adverse effect of over-excavation of a certain depth on the deformation of the foundation pit caused by the erection of the frames, reduces the deformation of the foundation pit, ensures the safety of the foundation pit and its surrounding environment, saves temporary concrete supports, ensures the construction quality of the structural beams and slabs, and avoids the construction of the concrete cushion layer before erecting the frames in the sequential construction method, and then removes the concrete cushion layer during subsequent excavation, resulting in material waste and avoiding the problem of a long total construction period.

[0015] The utility model provides a suspended lifting formwork system for reverse construction without cushion layer. Through the installation and removal of the power device and the nut on the suspension rod, it is convenient for the installation and removal of the lower structure beam and slab formwork system, so that the suspended lifting formwork system can be recycled and reused, which has the effect of energy saving and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a suspended lifting formwork system for reverse construction without cushion layer according to an embodiment;

[0017] Figure 2 It is a structural schematic diagram of a suspended lifting formwork system for reverse construction without cushion layer in another embodiment;

[0018] As shown in the figure:

[0019] 100. Suspended lifting formwork system;

[0020] 110. Lower structure beam and slab formwork system, 111. formwork, 112. secondary keel, 113. wood, 114. main keel, 115. tie bolts, 116. vertical pole;

[0021] 120, boom;

[0022] 130, nut, 131, backing plate;

[0023] 140. Power plant, 141. Hydraulic jack, 142. Steel beam;

[0024] 200, structural beam and slab, 210, structural beam, 220, structural slab. DETAILED DESCRIPTION

[0025] The utility model is described in detail below in conjunction with the accompanying drawings: According to the following description, the advantages and features of the utility model will be more clearly understood. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the utility model.

[0026] Please refer to Figure 1 to Figure 2 The embodiment of the utility model provides a suspended lifting formwork system 100 for reverse construction without cushion layer, including a lower structure beam and slab formwork system 110 located below the upper structure beam and slab 200 of the basement, a structural plate 220 dispersedly passing through the upper structure beam and slab 200 is suspended and connected to a plurality of hangers 120 distributed in a row and column matrix on the lower structure beam and slab formwork system 110, and nuts 130 are detachably connected to the upper and lower ends of each of the hangers 120, and the nuts 130 are respectively located above the upper structure beam and slab 200 and below the lower structure beam and slab formwork system 110, and a power device 140 is arranged on the hangers 120 in the columns on both sides, and the power device 140 is used to lift and lower the lower structure beam and slab formwork system 110 through the hangers 120 connected thereto.

[0027] The suspended lifting formwork system 100 for reverse construction without cushion layer provided by the embodiment of the utility model is suitable for reverse construction of basement structure. The lower structure beam and slab formwork system 110 is suspended and connected through the suspension rods 120 distributed in a row and column matrix and the nuts 130 at both ends under the completed upper structure beam and slab 200. The lower structure beam and slab formwork system 110 is lifted and lowered by the power device 140 on some of the suspension rods, so that the suspension height of the lower structure beam and slab formwork system 110 relative to the upper structure beam and slab 200 is adjusted by the power device 140, and the floor height between the upper and lower structure beam and slabs can be accurately controlled. The lower structure beam and slab is formed by tying the beam and slab steel bars on the lower structure beam and slab formwork system 110 and pouring concrete. When pouring the lower structure beam and slab, the pouring load is borne by the suspension rods 120, so that the concrete cushion layer can be avoided, the cushion layer concrete material is saved, and it is green and efficient. Compared with the sequential construction method for constructing the structural beams and slabs of the basement structure, the sequential construction method reduces the time for erecting the frames and the structural beam and slab formwork system, avoids the adverse effect of over-excavation of a certain depth on the deformation of the foundation pit caused by the erection of the frames, ensures the safety of the foundation pit and its surrounding environment, saves temporary concrete supports, ensures the construction quality of the structural beams and slabs, and avoids the construction of the concrete cushion layer before erecting the frames and the subsequent removal of the concrete cushion layer during excavation, resulting in material waste and a long total construction period.

[0028] The suspended lifting formwork system 100 for reverse construction without cushion layer provided by the embodiment of the utility model facilitates the installation and removal of the lower structure beam and slab formwork system 110 through the installation and removal of the power device 140 and the nut 130 on the suspension rod 120, so that the suspended lifting formwork system 100 can be recycled and reused, which has the effect of energy saving and environmental protection.

[0029] Please refer to Figure 1 to Figure 2 In order to improve the balanced lifting of the lower structure beam and slab formwork system 110, the suspended lifting formwork system 100 provided by the embodiment of the utility model is provided with the power device 140 on some of the suspension rods 120 in the middle of the row and column matrix. At this time, the power device 140 has three columns, namely, one column on each side and the middle position.

[0030] In order to achieve balanced lifting of the lower structure beam and slab formwork system 110, the suspended lifting formwork system 100 provided in the embodiment of the utility model, the power device 140 is at least arranged at the four corners and the middle of the multiple hangers 120 distributed in a row and column matrix, and can also be at least arranged at the four corners and the middle of the multiple hangers 120 distributed in a row and column matrix.

[0031] Please refer to Figure 1In order to provide power for the lifting operation of the lower structure beam and slab formwork system 110, the embodiment of the utility model provides a suspended lifting formwork system 100, wherein the power device 140 is located between the nut and the upper structure beam and slab 220, and includes hydraulic jacks 141 located on both sides of the suspension rod 120, a steel beam 142 arranged on the hydraulic jacks 141, the suspension rod 120 passes through the steel beam 142, and the nut 130 is against the upper surface of the steel beam 142. The hydraulic jacks 141 of the corresponding node can be two or four. The power device 140 can be a motor, and the motor is connected to the corresponding suspension rod 120 through a worm gear mechanism. The power device 140 can also be a winch, and the suspension rod 120 connected to the power device 140 is replaced by a chain. When the power device 140 of this structure is lifted and lowered, it needs to be used in conjunction with the nut 130 at the upper end of the suspension rod 120 that is not connected to the power device 140.

[0032] Please refer to Figure 2 In order to facilitate lifting control, the suspended lifting formwork system 100 provided by the embodiment of the utility model comprises a power device 140 including hydraulic jacks 141 disposed on the upper structure beam plate 200 at both sides of the suspension rod 120, a steel beam 142 disposed on the hydraulic jack 141, the suspension rod 120 passes through the steel beam 142, and the upper end of the suspension rod 120 is connected to two nuts 130, which are respectively against the upper surface of the steel beam 142 and the upper structure beam plate 200. In order to improve the locking force of the nut 130 on the upper structure beam plate 200, the nut 130 can be connected to the suspension rod 120 through a pad 131. At this time, when the lower structure beam and slab formwork system 110 is controlled to be lifted and lowered, the nut 130 at the upper end of the suspension rod 120 that is not connected to the power device 140 is removed; the lifting and lowering control of the lower structure beam and slab formwork system 110 is achieved by alternately locking the two nuts 130 at the upper end of the suspension rod 120 connected to the power device 140.

[0033] To realize the construction of the lower structural beams and slabs, please refer to Figure 1 to Figure 2The suspended lifting formwork system 100 provided by the embodiment of the utility model, the lower structure beam slab formwork system 110 includes a formwork 111 matching the facade shape of the lower structure beam slab, the formwork 111 has a lower surface at the lower end and a lower surface at the higher end, a secondary keel 112 located below the formwork 111, a wooden square 113 arranged between the lower surface at the lower end of the formwork 111 and the secondary keel 112, a main keel 114 vertically attached to the lower surface of the secondary keel 112, a tie bolt 115 connected to the structural beam of the formwork 111, and a vertical pole 116 arranged between the lower surface at the higher end of the formwork 111 and the secondary keel 112. The vertical pole 116 can be an adjustable vertical pole to adjust the sinking height of the structural beam of the lower structure beam slab. In order to improve the supporting strength, the main keel 114 and the secondary keel 112 can be I-beams.

[0034] The present utility model is not limited to the above-mentioned specific implementation modes. Obviously, the above-mentioned embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the described embodiments of the present utility model belong to the scope of protection of the present utility model. Those skilled in the art can make other levels of modifications and changes to the present utility model. In this way, if these modifications and changes of the present utility model fall within the scope of the claims of the present utility model, the present utility model is also intended to include these changes and changes.

Claims

1. A suspended lifting formwork system for reverse construction without cushion layer, characterized in that: It includes a lower structure beam and slab formwork system located below the upper structure beam and slab of the basement, and the structural panels dispersedly passing through the upper structure beam and slab are suspended and connected to a plurality of hangers distributed in a row and column matrix on the lower structure beam and slab formwork system, and the upper and lower ends of each hanger are detachably connected with nuts, and the nuts are respectively located above the upper structure beam and slab and below the lower structure beam and slab formwork system, and the hangers on the columns on both sides are provided with power devices, and the power devices are used to lift and lower the lower structure beam and slab formwork system through the hangers connected thereto.

2. The suspended lifting formwork system according to claim 1 is characterized in that: The power device is arranged on some of the suspension rods in the column where the middle part of the suspension rods distributed in the row and column matrix is ​​located.

3. The suspended lifting formwork system according to claim 1 is characterized in that: The power devices are at least five arranged at the four corners and the middle of a plurality of suspension rods distributed in a row and column matrix.

4. The suspended lifting formwork system according to claim 1 is characterized in that: The power devices are at least six arranged at the four corners and the middle of a plurality of suspension rods distributed in a row and column matrix.

5. The suspended lifting formwork system according to claim 1 is characterized in that: The power device is located between the nut and the upper structure beam plate, and includes hydraulic jacks located on both sides of the suspension rod, a steel beam arranged on the hydraulic jacks, the suspension rod passes through the steel beam, and the nut is against the upper surface of the steel beam.

6. The suspended lifting formwork system according to claim 1 is characterized in that: The power device includes hydraulic jacks located on both sides of the suspension rod and arranged on the upper structure beam plate, a steel beam arranged on the hydraulic jacks, the suspension rod passes through the steel beam, and the upper end of the suspension rod is connected to two nuts, which respectively abut against the upper surface of the steel beam and the upper structure beam plate.

7. The suspended lifting formwork system according to claim 1 is characterized in that: The power device is a motor, and the motor is connected to the corresponding suspension rod through a worm gear mechanism.

8. The suspended lifting formwork system according to claim 1 is characterized in that: The power device is a winch, and the suspension rod connected to the power device is replaced by a chain.

9. The suspended lifting formwork system according to claim 1, characterized in that: The lower structure beam and slab formwork system includes a template that matches the facade shape of the lower structure beam and slab, the template has a lower surface at a lower end and a lower surface at a higher end, a secondary keel located below the template, wooden planks arranged between the lower surface at the lower end of the template and the secondary keel, a main keel vertically attached to the lower surface of the secondary keel, tie bolts connected to the structural beam of the template, and vertical poles arranged between the lower surface at the higher end of the template and the secondary keel.

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