Waist beam bearing type scaffold

Abstract

The utility model belongs to the technical field of building scaffolds, and particularly relates to a waist beam bearing type scaffold, which is applied to a pull anchor supporting structure and is formed by combining and connecting a plurality of basic unit scaffolds, a plurality of waist beams are arranged on the pull anchor supporting structure, and a plurality of waist beam anchoring ends are arranged on each waist beam at intervals. Solid anchoring rods are pre-buried in the portions, between the waist beam anchoring ends, of the waist beams, the inner side of the foundation unit scaffold is fixedly connected between the two waist beams, and the portion between the bottom of the foundation unit scaffold and the bottom of the foundation pit is suspended. And each connecting node on the inner side of the basic unit scaffold is fixedly connected with the corresponding solid anchoring rods on the two waist beams in a detachable manner. The non-floor detachable waist beam bearing type scaffold can be used in a turnover mode from bottom to top, and the construction cost is reduced; and as the waist beam bearing type scaffold does not fall to the ground, timely backfilling can be realized, and the construction period is shortened.

Description

Technical Field

[0001] The utility model belongs to the technical field of building scaffolds, and in particular relates to a waist beam bearing type scaffold. Background Art

[0002] Underground construction projects are buildings that develop underground. The construction of underground buildings should first be carried out with deep foundation pit excavation and support engineering, and then the construction of underground buildings. When constructing underground buildings, the existing construction method is: between the outer wall of the underground building (referred to as: underground outer wall) and the wall of the foundation pit, a ground-type scaffolding (referred to as: ground-type scaffolding) must be set up. The height of the scaffolding must be at least from the bottom of the foundation pit to above the ground, or even higher, so that the underground building can be smoothly constructed. After the construction of the underground building is completed, the ground-type scaffolding is removed, and finally the space between the underground outer wall and the wall of the foundation pit (this space is referred to as: foundation trench) is backfilled.

[0003] The existing construction methods mainly have the following disadvantages:

[0004] First: The construction cost is high, because 1) the floor-standing frame uses a large number of steel pipes, scaffolding boards, safety nets and other accessories; 2) the floor-standing frame can only be dismantled after the underground construction is completed, and the scaffolding materials have a long service life; 3) the earth excavated at the construction site can only be backfilled after the floor-standing scaffolding is dismantled. Failure to backfill in time will result in the earth being transported out or transported again, the construction site is compressed, and the amount of excavation and filling earthwork is difficult to balance; 4) the materials of the floor-standing frame can only be used once from erection to dismantling, and cannot be circulated from bottom to top;

[0005] Second: High safety hazard, because 1) the demolition should be carried out step by step from top to bottom, and should be demolished in situ, not partially, and there is a risk of accessories falling from high places during the demolition process; 2) the foundation pit cannot be backfilled early, resulting in the failure to eliminate the dangerous source of the deep foundation pit in time, which poses a huge safety hazard;

[0006] Third: it takes up construction time, because 1) the foundation trench can only be backfilled after the scaffolding is removed, and the foundation trench backfilling time is late; 2) the ground frame needs to be erected and dismantled on the spot;

[0007] Fourth: The scope of use is limited, because 1) once the width of the floor stand is determined, it cannot be freely adjusted.

[0008] These shortcomings will cause serious losses to project costs and construction periods, and the construction risks are high, affecting the economic benefits of the industry. Utility Model Content

[0009] In order to solve the technical problem: the construction cost of ground-based scaffolding is high and it takes up construction time.

[0010] The utility model provides the following technical solutions:

[0011] A waist beam bearing scaffolding is applied to an anchor support structure and is formed by connecting a plurality of basic unit scaffoldings. The characteristic is that a plurality of waist beams are arranged on the anchor support structure, a plurality of waist beam anchoring ends are arranged at intervals on each waist beam, solid anchoring rods are embedded in the waist beams between the waist beam anchoring ends, and the inner side of the basic unit scaffolding is fixedly connected between the two waist beams, wherein the bottom of the basic unit scaffolding is suspended between the bottom of the foundation pit, and each connection node on the inner side of the basic unit scaffolding is respectively fixedly connected to the corresponding solid anchoring rods on the two waist beams in a detachable manner.

[0012] Furthermore, the basic unit scaffolding includes a three-layer horizontal plane structure, which includes a bottom layer, a middle layer and a top layer which are parallel to each other from bottom to top. The structures of the bottom layer, the middle layer and the top layer are the same, and are all composed of steel pipe frames and scaffolding boards. The scaffolding boards are laid on the top planes of the corresponding steel pipe frames.

[0013] Furthermore, the bottom or top layer steel tube frame includes inner large cross bars and outer large cross bars which are parallel to each other and located in the same horizontal plane, and a plurality of first small cross bars fixedly mounted on the top of the inner large cross bars and outer large cross bars of the bottom or top layer, the first small cross bars all correspond to the inner large cross bars which are perpendicular to the bottom or top layer, and scaffolding boards are laid on the top plane of the first small cross bars; the middle layer steel tube frame includes inner large cross bars and outer large cross bars which are parallel to each other and located in the same horizontal plane, and a plurality of second small cross bars fixedly mounted on the top of the inner large cross bars and outer large cross bars of the middle layer, the second small cross bars all correspond to the inner large cross bars which are perpendicular to the inner large cross bars of the middle layer, and scaffolding boards are laid on the top plane of the second small cross bars.

[0014] Furthermore, the length of the first small cross bar is greater than the length of the second small cross bar.

[0015] Furthermore, a large cross bar on the bottom or top layer close to the waist beam side is erected and connected to the horizontal plane where the middle of the top of the corresponding waist beam anchoring end is located; each first small cross bar is fixedly connected to the corresponding solid anchoring rod.

[0016] Furthermore, the basic unit scaffolding also includes a plurality of first vertical poles and a plurality of second vertical poles evenly distributed in the vertical direction, each first vertical pole is respectively connected to a corresponding row of connection nodes on the inner side of the steel pipe frame of the bottom layer, the middle layer and the top layer, and each second vertical pole is respectively connected to a corresponding row of connection nodes on the outer side of the steel pipe frame of the bottom layer, the middle layer and the top layer.

[0017] Furthermore, a top support is provided on the top of the first vertical pole, and the top of the top support abuts against the bottom plane of the waist beam corresponding to the top steel pipe frame.

[0018] Furthermore, a tightening nut is sleeved on the top support, and the tightening nut is used to adjust the spacing between the first upright poles fixed to the upper and lower waist beams.

[0019] Furthermore, the basic unit scaffolding also includes multiple rows of parallel diagonal braces and horizontal restraining cross bars. The top end of each diagonal brace is connected to the outer end of a first small cross bar corresponding to the bottom steel pipe frame, and the bottom end of each diagonal brace is fixedly connected to the horizontal restraining cross bar. The horizontal restraining cross bar is erected on the horizontal plane where the middle of the top of the waist beam anchor end is located below the bottom steel pipe frame.

[0020] Furthermore, diagonal brace scissor braces are provided at diagonal positions between the diagonal braces and are distributed on both inner and outer sides of the diagonal braces.

[0021] Furthermore, the basic unit scaffolding also includes a lifting ring steel wire rope which is sleeved on the middle part of the first small cross bar of the top layer. The lifting ring steel wire rope is located at the lower part of the first small cross bar and is connected to at least two symmetrically arranged lifting steel wire ropes through a lifting hoist. Both ends of each lifting steel wire rope are symmetrically fixed on the lifting ears arranged on the first vertical pole and the second vertical pole in the same column.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] The waist-beam bearing scaffolding of the utility model is composed of a plurality of basic unit scaffoldings connected in combination, and the basic unit scaffoldings are detachably connected to the anchor support structure. When in use, the inner side of the required basic unit scaffoldings is fixedly connected to the solid anchor rods pre-buried in the waist-beam structure, wherein the bottom of the basic unit scaffolding is suspended from the bottom of the foundation pit, and is a non-ground structure. After the construction of part of the underground building, after the foundation backfill is affected by the waist-beam bearing scaffolding, the plurality of basic unit scaffoldings can be dismantled and recycled.

[0024] Therefore, the non-ground-mounted and detachable waist-beam bearing scaffolding of the utility model can be used circulated from bottom to top, reducing the high construction cost; it can be dismantled during construction, and because the waist-beam bearing scaffolding does not touch the ground, the foundation trench can be backfilled in time, saving construction time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A cross-sectional view of a waist beam bearing scaffold according to an embodiment of the utility model;

[0026] Figure 2 A cross-sectional view of a basic unit scaffold according to an embodiment of the utility model;

[0027] Figure 3 This is an external elevation view of a basic unit scaffolding according to an embodiment of the utility model;

[0028] Figure 4 It is a cross-sectional view of the basic unit scaffolding AA of an embodiment of the utility model;

[0029] Figure 5 for Figure 2 A partial enlarged view of point A.

[0030] Reference numerals:

[0031] 1- horizontal restraining crossbar; 2- diagonal brace; 3- diagonal brace scissors brace; 4- first small crossbar; 5- large crossbar; 6- scaffolding board; 7- solid anchor rod; 8- first vertical pole; 9- second vertical pole; 10- second small crossbar; 11- top support; 111- tightening nut; 12- waist beam anchor end; 13- anchor support structure; 14- underground main structure; 15- bottom plate; 16- cushion layer; 17- waist beam; 18- steel strand; 19- lifting ear; 20- lifting ring wire rope; 21- lifting wire rope; 22- lifting hoist. DETAILED DESCRIPTION

[0032] The technical solution of the utility model will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without making creative work are within the protection scope of the utility model.

[0033] It should be noted that the terms "center", "up", "down", "horizontal", "left", "right", "front", "back", "lateral", "longitudinal", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0034] Combination Figure 1-Figure 4 As shown, the utility model provides a waist-beam bearing scaffold, which is a construction operation space provided during the underground building construction to facilitate the construction operations of the construction personnel. The conventional construction operation space is to set up a ground-based double-row or multi-row scaffold to complete the construction operations. The waist-beam bearing scaffold of this embodiment is applied between the anchor support structure 13 of the deep foundation pit and the underground main structure 14 under construction. The anchor support structure 13 is generally composed of steel strands, cast-in-place piles and steel waist beams. The waist-beam bearing scaffold does not need to be fixed on the bottom of the deep foundation pit composed of the bottom plate 15 and the cushion layer 16, that is, the waist-beam bearing scaffold of this embodiment is a non-ground-based suspended structure.

[0035] The main body of the anchor support structure 13 of this embodiment is a concrete structure. The anchor support structure 13 also includes a plurality of waist beams 17 horizontally arranged on the outer wall of the main body of the anchor support structure 13 for supporting the main body of the anchor support structure 13. The distance between two waist beams 17 is set according to the actual project and is ≤4500 mm. Waist beam anchoring ends 12 are arranged at equal intervals on each waist beam 17. In this embodiment, the distance between each waist beam anchoring end 12 is 1.5 meters. Several waist beam anchoring ends 12 press each waist beam 17 against the entire main body of the anchor support structure 13. Each waist beam anchoring end 12 is pulled and fixed to the main body of the anchor support structure 13 by a steel strand 18. The steel strand 18 runs through the waist beam anchoring end 12 and the anchor support structure 13, so that the entire anchor support structure 13 is stable and does not tilt.

[0036] The waist beam bearing scaffold is fixedly connected to the anchor support structure 13 and can be unloaded and removed from the anchor support structure 13. This embodiment is described by taking one section of the anchor support structure 13 as an example. Figure 2-Figure 4 As shown, there are three rows of waist beams 17 on the anchor support structure 13, which are the first row, the second row, and the third row from bottom to top. Each waist beam 17 includes two rows of steel sections, and the steel sections have flanges and webs. Compared with the existing ground-based frames, the design of this embodiment is a non-ground-based waist beam bearing scaffolding, that is, the waist beam bearing scaffolding is fixed on the anchor support structure 13, does not occupy the ground in the foundation pit backfill area, and is convenient for early backfilling of the foundation pit.

[0037] like Figure 4 As shown, the waist beam bearing scaffolding includes a solid anchor rod 7 embedded in the vertical direction near the bottom of each waist beam anchoring end 12 of the second and third rows, and a detachable basic unit scaffolding fixedly connected to the solid anchor rod 7. The solid anchor rod 7 is an ordinary steel pipe filled with C20 concrete. Each solid anchor rod 7 is embedded in the main concrete of the anchor support structure 13 between two adjacent waist beam anchoring ends 12, and does not intersect with the steel strand 18 used for pulling and fixing. Several basic unit scaffoldings are connected to each other to form an integral non-ground waist beam bearing scaffolding. Each basic unit scaffolding can be independently installed, used and removed, and is suitable for various shapes of underground building exterior walls.

[0038] Compared with the existing ground-based integral scaffolding, the waist beam bearing scaffolding of this embodiment is assembled and installed by basic unit scaffolding. It can be erected, dismantled, transported and recycled partially or as a whole from top to bottom or from bottom to top as needed without affecting the use of other parts of the waist beam bearing scaffolding; the material turnover rate is improved and the construction cost is reduced.

[0039] The basic unit scaffolding is 5.8 meters long to maximize the use of standard steel pipes (6 meters in length) of on-site scaffolding. The exposed 0.1 meters at both ends are required for safe construction. The width can be adjusted according to project needs, and the height can be selected according to project needs using appropriate poles.

[0040] like Figure 2 As shown, the basic unit scaffold is a three-layer horizontal plane structure, which includes a bottom layer, a middle layer and a top layer which are parallel to each other from bottom to top, wherein the bottom layer and the top layer are fixedly connected with the solid anchor rods 7 embedded in the anchor support structure 13. The structures of the bottom layer, the middle layer and the top layer are the same, and are all composed of a steel pipe frame and a scaffolding board 6, and the scaffolding board 6 is laid on the top plane of the corresponding steel pipe frame, and the size specifications of the bottom layer and the top layer are exactly the same.

[0041] For the structure of the bottom layer and the top layer, take the bottom layer as an example to explain.

[0042] Combination Figure 2 , Figure 3 As shown, the steel pipe frame of the bottom layer includes an inner large crossbar 5 and an outer large crossbar 5 located in the same horizontal plane and parallel to each other, and five first small crossbars 4 fixedly mounted on the top of the inner large crossbar 5 and the outer large crossbar 5, the five first small crossbars 4 are all perpendicular to the inner large crossbar 5 and the outer large crossbar 5, and scaffolding boards 6 are laid on the top plane of the five first small crossbars 4, wherein the inner and outer large crossbars 5 are ordinary steel pipes with a length of 6 meters, and the scaffolding boards 6 are made of ordinary wood or steel. The inner large crossbar 5 is mounted and connected to the horizontal plane of the corresponding waist beam 17 where the middle of the top of the second row of waist beam anchoring ends 12 is located.

[0043] like Figure 2 As shown, there is a certain distance between the inner and outer large cross bars 5, the length of the first small cross bar 4 is greater than the distance between the inner and outer large cross bars 5, and the inner end of each first small cross bar 4 is fixedly connected to a corresponding second row solid anchor rod 7 by a fastener. The width of the basic unit scaffold can be adjusted by the first small cross bar 4, and the span of the scaffold is set according to the actual needs of the project and is ≤1800 mm. Compared with the fixed width floor stand, it has a wider range of applications.

[0044] Combination Figure 2 , Figure 3As shown, the steel pipe frame of the middle layer includes an inner large crossbar 5 and an outer large crossbar 5 located in the same horizontal plane and parallel to each other, and five second small crossbars 10 fixedly mounted on the top of the inner large crossbar 5 and the outer large crossbar 5. The five second small crossbars 10 are perpendicular to the inner large crossbar 5 and the outer large crossbar 5, and the second small crossbars 10 are ordinary steel pipes. Scaffolding boards 6 are laid on the top planes of the five second small crossbars 10. The length of the second small crossbar 10 is greater than the distance between the inner large crossbar 5 and the outer large crossbar 5 of the middle layer, and the length of the second small crossbar 10 is less than the first small crossbar 4.

[0045] Combination Figure 2-Figure 4 As shown, the basic unit scaffolding also includes five rows of first uprights 8 and five rows of second uprights 9 evenly distributed in the vertical direction. The first uprights 8 and the second uprights 9 are used to support the steel pipe frames connecting the bottom, middle and top layers of the basic unit scaffolding. Figure 1 As shown, the first vertical pole 8 is located on the inner side close to the anchor support structure 13, and the second vertical pole 9 is located on the outer side. The first vertical pole 8 and the second vertical pole 9 are both ordinary steel pipes, and the height is selected according to the spacing of the waist beam 17. The five columns of first vertical poles 8 are the first column to the fifth column from left to right, and the bottom ends of the five first vertical poles 8 are located on the horizontal plane of the waist beam 17 corresponding to the middle of the top of the second row of waist beam anchoring ends 12, and are respectively connected to the inner side of the bottom layer of the large crossbar 5 and the connection nodes of each first small crossbar 4. Similarly, the bottom ends of the five columns of second vertical poles 9 are respectively connected to the outer side of the bottom layer of the large crossbar 5 and the connection nodes of each first small crossbar 4.

[0046] like Figure 4 As shown, a top support 11 is passed through the top of each first vertical pole 8, and the top of the top support 11 abuts against the bottom web of the second row of waist beams 17. The top support 11 has a tightening nut 111, which is used to adjust the spacing between the first vertical poles 8 fixed to the upper and lower waist beams 17.

[0047] like Figure 2 As shown, the top end of each second upright 9 is respectively fixedly connected to the outer large crossbar 5 of the top layer and the connection node of each first small crossbar 4. The end of each first small crossbar 4 of the top layer is fixedly connected to a solid anchor rod 7 corresponding to the third row through a fastener, and the inner large crossbar 5 of the top layer is fixedly mounted on the horizontal plane of the waist beam 17 corresponding to the middle of the top of the waist beam anchor end 12 of the third row.

[0048] The connecting nodes of the outer large cross bar 5 of the middle layer and each second small cross bar 10 are respectively connected to the middle of a corresponding second vertical pole 9, and the connecting nodes of the inner large cross bar 5 and each second small cross bar 10 are respectively connected to the middle of a corresponding second vertical pole 9.

[0049] In addition, in this example, when the web depth of the waist beam 17 is relatively deep, the inner large crossbars 5 of the bottom layer and the top layer do not contact the five first small crossbars 4. At this time, the inner large crossbars 5 and the five first small crossbars 4 do not need to be connected and fixed. It is only necessary to connect and fix each first vertical rod 8 with the five first small crossbars 4, and to connect and fix each first vertical rod 8 with the five inner large crossbars 5. Of course, the inner large crossbars 5 of the bottom layer and the top layer can also be omitted.

[0050] Combination Figure 2 , Figure 3 As shown, the basic unit scaffolding also includes five rows of mutually parallel diagonal braces 2 and a horizontal restraining crossbar 1. The horizontal restraining crossbar 1 is set up on the horizontal plane where the middle of the first row of waist beam anchoring ends 12 is located, corresponding to the waist beam 17, and is used to fix the diagonal braces 2 and determine the spacing of the basic unit scaffolding. The bottom end of each diagonal brace 2 is fixedly connected to the horizontal restraining crossbar 1, and the top end of each diagonal brace 2 is correspondingly connected to the outer end of the first small crossbar 4 of a bottom layer. The angle between the diagonal brace 2 and the vertical plane can be adjusted and fixed as necessary according to actual needs.

[0051] Combination Figure 1 , Figure 4 As shown, the diagonal brace 2 can also be distributed between the bottom and top steel pipe frames. Specifically, the top end of the diagonal brace 2 is connected to the outer end of the first small cross bar 4 of the top steel pipe frame, and the bottom end of the diagonal brace 2 is connected to the inner end of the first small cross bar 4 of the bottom steel pipe frame. The angle between the diagonal brace 2 and the vertical plane of the anchor support structure 13 is less than 45°, preferably ≤35°, to achieve better support effect; the horizontal constraint cross bar 1 is also distributed and erected on the horizontal plane where the waist beam 17 corresponding to the middle part of the second row waist beam anchor end 12 is located.

[0052] like Figure 5 As shown, the end of the diagonal brace 2 connected to the horizontal restraining crossbar 1 is hemispherical, and the diameter of the ball is the same as the diameter of the diagonal brace steel pipe, so as to reduce the rigid friction with the corresponding waist beam 17 and the horizontal restraining crossbar 1.

[0053] Diagonal brace scissor braces 3 are provided at diagonal positions between the five groups of diagonal braces 2 and are distributed on both sides inside and outside the diagonal braces 2 to strengthen the rigidity of the diagonal braces 2.

[0054] The following large crossbars, small crossbars, and vertical poles are technical terms in the scaffolding field.

[0055] The basic unit scaffolding also includes a hoisting circular steel wire rope 20 sleeved on the middle of the five first small cross bars 4 on the top layer. The hoisting circular steel wire rope 20 is located on the lower section of the five first small cross bars 4 and is hooked with two hoisting steel wire ropes 21 through a hoisting hoist 22.

[0056] Specifically, the basic unit scaffolding also includes a lifting lug 19 arranged in the middle of the first vertical pole 8 and the second vertical pole 9 in the second column, and in the middle of the first vertical pole 8 and the second vertical pole 9 in the fourth column, and the lifting lug 19 is connected to the inner large cross bar 5 of the middle layer and below the outer large cross bar 5.

[0057] One end of a lifting wire rope 21 is fixed to the lifting lug 19 on the first vertical pole 8 of the second row, and the other end is fixed to the lifting lug 19 on the second vertical pole 9 of the second row; one end of another lifting wire rope 21 is fixed to the lifting lug 19 on the first vertical pole 8 of the fourth row, and the other end is fixed to the lifting lug 19 on the second vertical pole 9 of the fourth row. The lifting wire rope 21 is connected to the lower section of the lifting circular wire rope 20 through a hoisting hoist 22.

[0058] When the tower crane hook and the lifting wire rope 21 are hooked on the middle nodes of the second and fourth columns of the basic unit scaffolding, the basic unit scaffolding is lifted to a preset height, and then the lifting wire rope 21 hung on the second and fourth columns of the vertical poles is connected to the lifting ring wire rope 20 through the hoisting hoist 22. After the tower crane is unhooked, the basic unit scaffolding is hung on the lifting ring wire rope 20, and the basic unit scaffolding is towed to a position convenient for vertical lifting by the traction rope, and then transported upward for assembly and use, or hoisted to a designated site for disassembly and removal of the basic unit scaffolding.

[0059] Installation process:

[0060] Pre-embed solid anchor rod 7 → assemble basic unit scaffolding → tower crane hoist basic unit scaffolding to installation position → connect the first small cross bar 4 of the bottom layer with the solid anchor rod 7 through fasteners and put the diagonal brace 2 in place → lift the top support 11 to initially fix the basic unit scaffolding → adjust the width and flatness of the basic unit scaffolding and fix the basic unit scaffolding → after the tower crane releases the hook, continue to hoist the next basic unit scaffolding to the installation position → connect and fix the basic unit scaffoldings installed and fixed in sequence → lay scaffolding boards 6 and skirting boards and other facilities on the connected and fixed waist beam bearing scaffolding (composed of several basic unit scaffoldings) → repeat the hoisting, fixing, connecting and other processes until the waist beam bearing scaffolding is installed → use after acceptance.

[0061] Lifting or removal process:

[0062] After the construction of underground buildings is completed, the lower waist beam bearing scaffolding can be dismantled only when the bottom foundation pit of the corresponding lower waist beam bearing scaffolding is backfilled to the point where it affects the continued backfilling of the foundation pit. The basic unit scaffolding should be separated from the overall waist beam bearing scaffolding in the order of dismantling. It is forbidden to separate three or more unit frames at a time to ensure its integrity.

[0063] Fasten the tower crane hook and wire rope to the main nodes in the middle of the second and fourth columns of the basic unit scaffolding, lift the unit frame and transport it upwards for further assembly, or lift it to a designated site for disassembly and removal of the unit frame; or dismantle the unit frame at the location where it is used;

[0064] The unit frame should be dismantled from top to bottom, with the accessories installed first being removed last and the accessories installed later being removed first.

[0065] Therefore, the technology of the utility model can dismantle the waist beam bearing scaffolding within the scope of the completed underground building while constructing the underground building, and retain the waist beam bearing scaffolding within the scope of the underground building under construction, so as not to affect the continued upward construction of the underground building; the scope of the dismantled waist beam bearing scaffolding is the backfill scope of the foundation pit, and the dismantled waist beam bearing scaffolding is dismantled one by one according to the basic unit scaffolding it is composed of, and then hoisted to the upper waist beam bearing scaffolding by the tower crane as a whole for continued installation and use. After use, the accessories can be dismantled and recycled, and can be circulated and reused. The technical problem of backfilling the foundation pit in advance when the bearing scaffolding is not completely dismantled is solved, and the purpose of backfilling the foundation pit while constructing the outer wall of the underground building is achieved, thereby solving the shortcomings of the traditional construction method.

[0066] Therefore, compared with the conventional floor stand in the prior art:

[0067] The waist beam bearing scaffolding of this embodiment can be transported up and down and recycled, thereby improving the turnover rate of the waist beam bearing scaffolding and reducing costs to achieve the goal of green construction;

[0068] The waist beam load-bearing scaffolding can be assembled at a non-installation position and hoisted to the installation position for overall connection, which can increase the speed of erection of the load-bearing scaffolding and reduce safety risks. Dismantling or reverse transportation also has such properties, while conventional floor-standing frames can only be erected or dismantled at the installation position, which affects the construction period and has high safety risks;

[0069] This waist beam bearing scaffolding can realize the construction of superstructure while backfilling the foundation trench.

[0070] The above technical features constitute the best implementation example of the present utility model, which has strong adaptability and best implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the needs of different situations.

[0071] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Simple modifications or equivalent substitutions of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. A waist beam bearing scaffolding, applied to anchor support structure, is composed of several basic unit scaffoldings connected together, characterized in that: A plurality of waist beams are arranged on the anchor support structure, and a number of waist beam anchoring ends are arranged at intervals on each waist beam, and solid anchor rods are embedded in the waist beams between the waist beam anchoring ends. The inner side of the basic unit scaffolding is fixedly connected between the two waist beams, wherein the bottom of the basic unit scaffolding is suspended between the bottom of the foundation pit, and each connection node on the inner side of the basic unit scaffolding is respectively fixedly connected to the corresponding solid anchor rods on the two waist beams in a detachable manner.

2. The waist beam bearing scaffolding according to claim 1 is characterized in that: The basic unit scaffolding includes three horizontal plane structures, which include a bottom layer, a middle layer and a top layer which are parallel to each other from bottom to top. The structures of the bottom layer, the middle layer and the top layer are the same, and are all composed of steel pipe frames and scaffolding boards. The scaffolding boards are laid on the top planes of the corresponding steel pipe frames.

3. The waist beam bearing scaffolding according to claim 2 is characterized in that: The bottom or top layer steel tube frame comprises inner large cross bars and outer large cross bars which are parallel to each other and located in the same horizontal plane, and a plurality of first small cross bars fixedly mounted on the top of the inner large cross bars and outer large cross bars of the bottom or top layer, the first small cross bars all correspond to the inner large cross bars which are perpendicular to the bottom or top layer, and scaffolding boards are laid on the top plane of the first small cross bars; the middle layer steel tube frame comprises inner large cross bars and outer large cross bars which are parallel to each other and located in the same horizontal plane, and a plurality of second small cross bars fixedly mounted on the top of the inner large cross bars and outer large cross bars of the middle layer, the second small cross bars all correspond to the inner large cross bars which are perpendicular to the inner large cross bars of the middle layer, and scaffolding boards are laid on the top plane of the second small cross bars.

4. The waist beam bearing scaffolding according to claim 3 is characterized in that: The length of the first small crossbar is greater than the length of the second small crossbar.

5. The waist beam bearing scaffolding according to claim 3 is characterized in that: The large cross bar on the bottom or top layer close to the waist beam side is erected and connected to the horizontal plane where the middle of the top of the corresponding waist beam anchoring end is located; each first small cross bar is fixedly connected to the corresponding solid anchoring rod.

6. The waist beam bearing scaffolding according to claim 3 is characterized in that: The basic unit scaffolding also includes a plurality of first vertical poles and a plurality of second vertical poles evenly distributed in the vertical direction, each first vertical pole is respectively connected to a corresponding row of connection nodes on the inner side of the steel pipe frame of the bottom layer, the middle layer and the top layer, and each second vertical pole is respectively connected to a corresponding row of connection nodes on the outer side of the steel pipe frame of the bottom layer, the middle layer and the top layer.

7. The waist beam bearing scaffolding according to claim 6 is characterized in that: A top support is provided on the top of the first upright pole, the top of the top support abuts against the bottom plane of the waist beam corresponding to the top steel pipe frame, and a tightening nut is sleeved on the top support.

8. The waist beam bearing scaffolding according to claim 6, characterized in that: The basic unit scaffolding also includes multiple rows of parallel diagonal braces and horizontal restraining cross bars. The top end of each diagonal brace is connected to the outer end of a first small cross bar corresponding to the bottom steel pipe frame, and the bottom end of each diagonal brace is fixedly connected to the horizontal restraining cross bar. The horizontal restraining cross bar is erected on the horizontal plane where the middle of the top of the waist beam anchor end is located below the bottom steel pipe frame.

9. The waist beam bearing scaffolding according to claim 8, characterized in that: Diagonal braces are provided at diagonal positions between the diagonal braces and are distributed on both sides inside and outside the diagonal braces.

10. The waist beam bearing scaffold according to any one of claims 6 to 9, characterized in that: The basic unit scaffolding also includes a lifting ring steel wire rope sleeved on the middle part of the first small cross bar of the top layer. The lifting ring steel wire rope is located at the lower part of the first small cross bar and is connected to at least two symmetrically arranged lifting steel wire ropes through a hoist. Both ends of each lifting steel wire rope are symmetrically fixed on the lifting ears arranged on the first vertical pole and the second vertical pole in the same column.

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