CN210712856U

CN210712856U - Assembled foundation pit prestress supporting system

Info

Publication number: CN210712856U
Application number: CN201920989905.4U
Authority: CN
Inventors: 任伟辉; 王志军
Original assignee: Wuhan Construction Engineering Special Engineering Co Ltd
Current assignee: Wuhan Construction Engineering Special Engineering Co Ltd
Priority date: 2019-06-26
Filing date: 2019-06-26
Publication date: 2020-06-09
Anticipated expiration: 2029-06-26

Abstract

The utility model discloses an assembly type foundation pit prestress supporting system, relating to the technical field of foundation pit supporting engineering, the novel foundation pit supporting structure comprises a plurality of main beams, horizontal beams and vertical columns, the main beams are enclosed into a closed frame shape, each horizontal beam comprises a plurality of supporting beams, a first oblique beam, a second oblique beam, an auxiliary beam and a reinforcing beam, the supporting beams cross over a foundation pit and are connected between two oppositely arranged main beams in a bolted mode, the first oblique beam is connected between two adjacent main beams located at corners in a bolted mode, the second oblique beam is connected between the supporting beams and the main beams in a bolted mode, the auxiliary beams connected with the main beams in a bolted mode are arranged at positions, erected by the first oblique beam and the second oblique beam, of the two adjacent supporting beams in a bolted mode, the vertical columns are arranged under the joints of the adjacent horizontal beams, and the horizontal beams and the vertical columns are connected in a bolted mode through connecting components with adjustable multidirectional lengths. The utility model discloses a coupling assembling realizes the flexible adjustment between to the horizontal beam and between horizontal beam and the vertical post.

Description

Assembled foundation pit prestress supporting system

Technical Field

The utility model belongs to the technical field of the technique of excavation supporting engineering and specifically relates to an assembled foundation ditch prestressing force support system is related to.

Background

The foundation pit supporting is an engineering construction method which adopts retaining, reinforcing and protecting measures for the side wall and the peripheral environment of the foundation pit in order to ensure the safety of the underground structure construction and the peripheral environment of the foundation pit, generally adopts a mode of pouring a reinforced concrete supporting pile at the side slope of the foundation pit to support the foundation pit, and then is assisted with an inner support or an anchor rod to support and tighten the supporting pile so as to ensure the effective support of the supporting pile to the foundation pit, but after the foundation pit is excavated, when the reinforced concrete supporting structure needs to be dismantled, only an explosion mode can be adopted, so that the environment is polluted, and the cost is huge. Therefore, engineering personnel develop an assembled supporting structure, the supporting structure takes a formed prefabricated part as a main body and is assembled on site through various technical means to form the supporting structure, and at present, the assembled supporting structure which is mature in the market comprises the following components: precast pile, prefabricated underground continuous wall structure, prestressing force fish belly sill bearing structure.

Chinese patent with patent publication No. CN207392211U proposes an assembled foundation pit prestressed supporting system, which is applied in the foundation pit, and the assembled foundation pit prestressed supporting system includes: the supporting layers are arranged at intervals along the height direction of the foundation pit; the supporting layer comprises a ring-shaped first supporting beam detachably attached to the inner wall of the foundation pit and a plurality of second supporting beams erected between the first supporting beams, two ends of each second supporting beam are detachably connected to the inner side of the first supporting beam respectively, and the plurality of second supporting beams are not in direct contact with each other; the second support beam surface is removably connected to a plurality of reinforcement panels. The utility model discloses a simple structure, the installation is quick, nimble, and construction operation is simple and convenient, can avoid the problem that concrete support construction later stage need be demolishd on the present market, saves the time limit for a project moreover greatly, and the support system can also be retrieved and recycled, has greatly reduced construction cost.

The above prior art solutions have the following drawbacks: the steel construction among the support system is mostly prefabricated, length is fixed, and when strutting in the foundation ditch of different specifications, it has the gap to produce to exempt from between the support steel construction, if not consolidate gap department, must influence the stable support of support system to the foundation ditch side slope, and adopt expanded concrete to fill usually to the gap department of steel construction among the prior art, can effectively consolidate gap department admittedly, but expanded concrete solidification after comparatively troublesome when dismantling support system, still can cause the damage to the steel construction even, influence next use.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a steel construction adjustable assembled foundation ditch prestressing force support system that stretches out and draws back.

The utility model aims at realizing through the following technical scheme:

an assembly type foundation pit prestress supporting system comprises a plurality of main beams, a plurality of horizontal beams and a plurality of vertical columns, wherein the main beams are arranged along the edge of a foundation pit slope and enclosed into a closed frame shape, each horizontal beam comprises a plurality of supporting beams, a first oblique beam, a second oblique beam, an auxiliary beam and a reinforcing beam, the supporting beams cross over the foundation pit and are connected between the two main beams which are oppositely arranged in a bolted mode, the first oblique beam is connected between the two adjacent main beams which are positioned at the corners in a bolted mode, the second oblique beam is connected between the supporting beams and the main beams in a bolted mode, included angles between the main beams and the first oblique beam and between the main beams and the second oblique beam are 45 degrees, the auxiliary beams in bolted connection with the main beams are arranged at the positions where the first oblique beam and the second oblique beam are erected, and a plurality of reinforcing beams are connected between the two adjacent supporting beams in a bolted mode, the vertical columns are arranged under the joint parts of the first oblique beam/the second oblique beam and the auxiliary beam and under the reinforcing beam and the supporting beam, and the horizontal beam is connected with the vertical columns through a multi-direction length-adjustable connecting assembly in a bolted mode.

By adopting the technical scheme, when the foundation pit side slope is supported, the main beam is arranged at the edge of the upper end of the foundation pit side slope, the supporting beam and the first inclined beam are sequentially arranged to support the main beam opposite to the main beam and the main beam adjacent to the corner, so that the main beam can provide stable support for the foundation pit side slope, the auxiliary beam is arranged to reinforce the connection between the first inclined beam and the main beam, the second inclined beam is arranged to reinforce the connection between the supporting beam and the main beam, and the reinforcing beam is arranged to connect the supporting beams into a whole, so that the overall strength of the supporting system is further improved, and the supporting system can effectively protect the foundation pit side slope; the utility model discloses a supporting system, including first sloping or second sloping and auxiliary beam, the connecting component that simultaneously props up through multidirectional adjustable length has vertical post in the combination portion below of first sloping or second sloping and auxiliary beam, also prop up the vertical post that is equipped with through connecting component and connects in reinforcing beam and a supporting beam below, and then make the gap accessible connecting component between each steel construction link up and compensate, the holistic stability of supporting system has been guaranteed as far as, and it is more convenient when installing and dismantling the supporting system, it is swift, the supporting system can repetitious usage and can apply to in the foundation ditch of various different areas, construction cost is reduced.

Further setting the following steps: coupling assembling includes that the cross section is regular octagon's connection pad, the equal rigid coupling in eight planes of connection pad lateral wall has the spliced pole, the spliced pole with be connected with the flexible subassembly that is used for controlling the gap between the steel construction between the horizontal beam, the middle part rigid coupling of connection pad one end has the bearing post, the bearing post with vertical post lift is connected.

Through adopting above-mentioned technical scheme, with the bearing post with vertical post go up and down to be connected the back, make spliced pole and the horizontal beam on the connection pad be in on the same horizontal plane, suitable spliced pole department on the connection pad is connected with the horizontal beam to rethread telescopic assembly, when still having the space between horizontal beam and the spliced pole that corresponds, the flexible subassembly of accessible links up firmly for it is more convenient when dismantling the support system after the foundation ditch excavation is accomplished, and can not cause the damage to the steel construction.

Further setting the following steps: flexible subassembly includes the rigid coupling and is in the spliced pole is kept away from the first ring flange of connection pad one end, the horizontal beam is close to the one end rigid coupling of connection pad have with the second ring flange of first ring flange with the specification, the bolt joint be connected with on the first ring flange a plurality of with the high strength bolt of perforation grafting adaptation on the second ring flange, on the high strength bolt in the equal threaded connection in second ring flange both sides has fastening nut.

By adopting the technical scheme, when the horizontal beam is connected with the connecting column, the second flange plate is sleeved on the high-strength bolts, the two fastening nuts on the same high-strength bolt are respectively arranged on the two sides of the second flange plate, the second flange plate can be driven to synchronously slide on the high-strength bolts through the rotating fastening bolts, the horizontal beam and the connecting column are tensioned through the high-strength bolts and the fastening nuts, and the effective connection of gaps between the horizontal beam and the connecting column is realized.

Further setting the following steps: the hydraulic jack is fixedly bolted to the upper end face of the vertical column, and a sleeve block which is completely spliced and matched with a piston rod of the hydraulic jack is fixedly connected to one end, far away from the connecting disc, of the pressure-bearing column.

Through adopting above-mentioned technical scheme, when foundation ditch area is great, the span increase of horizontal beam, the dead weight of horizontal beam orders about the horizontal beam and has the trend of tenesmus, can start hydraulic jack at this moment and effectively strut the horizontal beam, and the laborsaving regulation of being convenient for has further increased the stability of strutting the system.

Further setting the following steps: the connection pad is kept away from the one end level of pressure-bearing post rotates and is connected with the laser pen, the laser line that the laser pen jetted out with first ring flange periphery wall is closest to one of laser pen is tangent.

By adopting the technical scheme, the laser pen is rotated to the connecting column connected with the horizontal beam, and the levelness condition of the horizontal beam after being supported by the vertical column can be judged through the projection form of the laser line emitted by the laser pen on the second flange plate; when the laser line is positioned above the second flange plate, the vertical height of the connecting disc is too high, the hydraulic jack needs to be adjusted to enable the connecting disc to descend until the laser line is tangent to the outer peripheral wall of the second flange plate, when the laser line irradiates on the surface of the second flange plate, the vertical column does not effectively support the joint part of the horizontal beam, and the hydraulic jack needs to be adjusted to enable the connecting disc to be lifted.

Further setting the following steps: the connecting disc lateral wall is fixedly connected with stiffening ribs between two adjacent connecting columns, and the stiffening ribs are coplanar and parallel to the upper end face of the connecting disc.

Through adopting above-mentioned technical scheme, the tightness of connecting between a plurality of spliced poles has been strengthened to the stiffening rib for coupling assembling's structural strength is higher, can carry out effective connection to the horizontal beam.

Further setting the following steps: the connecting disc is hollow, a reinforcing plate in a shape like a Chinese character 'mi' is vertically and fixedly connected inside the connecting disc, and each end of the reinforcing plate is fixedly connected with the inner side wall of a corner line of the side wall of the connecting disc.

Through adopting above-mentioned technical scheme, the setting up of reinforcing plate has strengthened the bulk strength of connection pad, has further improved coupling assembling's structural strength.

Further setting the following steps: the supporting beam, first sloping, the second sloping the auxiliary beam the reinforcement roof beam the spliced pole with the pressure-bearing post all adopts the pipe or the side pipe of the same specification.

Through adopting above-mentioned technical scheme, more quick, stable when connecting a plurality of horizontal beams by the connection pad, and the lightweight more of support system has reduced the steel consumption, has reduced the cost.

To sum up, the utility model discloses a beneficial technological effect does:

1. the horizontal beam and the connecting column are tightened through the high-strength bolt and the fastening nut, so that the effective connection of a gap between the horizontal beam and the connecting column is realized, the support system is more convenient and fast to remove after the foundation pit is excavated, and the steel structure is not damaged;

2. the hydraulic jack effectively supports the horizontal beam, is convenient for labor-saving adjustment, and further increases the stability of a supporting system;

3. the laser pen is arranged, so that the levelness between the horizontal beams can be detected in time, and the support adjustment of the vertical column to the horizontal beams is facilitated.

Drawings

Fig. 1 is a top view of the overall structure of the present invention;

fig. 2 is the overall structure schematic diagram of the horizontal beam, the vertical column and the connecting assembly of the present invention.

Reference numerals: 1. a main beam; 2. a horizontal beam; 3. a vertical column; 4. a support beam; 5. a first inclined beam; 6. a second inclined beam; 7. an auxiliary beam; 8. reinforcing the beam; 9. a connecting disc; 10. connecting columns; 11. a pressure-bearing column; 12. a first flange plate; 13. a second flange plate; 14. a high strength bolt; 15. fastening a nut; 16. a hydraulic jack; 17. sleeving blocks; 18. a laser pen; 19. a stiffening rib.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, for the assembled foundation pit prestressed supporting system disclosed by the present invention, comprising a plurality of main beams 1, a plurality of horizontal beams 2 and a plurality of vertical columns 3, the horizontal beams 2 and the vertical columns 3 all adopt round tubes with the same specification, the plurality of main beams 1 are arranged along the edge of the foundation pit side slope and enclosed into a closed frame shape, the horizontal beams 2 comprise a plurality of supporting beams 4, a first oblique beam 5, a second oblique beam 6, an auxiliary beam 7 and a reinforcing beam 8, the supporting beams 4 traverse over the foundation pit and are bolted between two main beams 1 arranged oppositely, the first oblique beam 5 is bolted between two adjacent main beams 1 at the corner, the second oblique beam 6 is bolted between the supporting beams 4 and the main beams 1, the main beams 1 and the first oblique beam 5 and the main beams 1 and the second oblique beam 6 both have an included angle of 45 degrees, the auxiliary beams 7 bolted with the main beams 1 are arranged at the positions of the first oblique beam 5 and the second oblique beam 6, a plurality of reinforcing beams 8 are connected between two adjacent supporting beams 4 in a bolted mode, a plurality of vertical columns 3 are arranged under the joint portion of the first oblique beam 5/the second oblique beam 6 and the auxiliary beam 7 and under the reinforcing beam 8 and the supporting beam 4, and the horizontal beam 2 and the vertical columns 3 are connected through a connecting assembly with adjustable multidirectional length in a bolted mode.

When a foundation pit side slope is supported, the main beam 1 is arranged at the edge of the upper end of the foundation pit side slope, the supporting beams 4 and the first inclined beams 5 are sequentially arranged to support the main beam 1 opposite to each other and the main beam 1 adjacent to the corner, so that the main beam 1 can provide stable support for the foundation pit side slope, the auxiliary beam 7 is arranged to reinforce the connection between the first inclined beam 5 and the main beam 1, the second inclined beam 6 is arranged to reinforce the connection between the supporting beams 4 and the main beam 1, and the reinforcing beam 8 is arranged to connect the supporting beams 4 into a whole, so that the overall strength of the supporting system is further improved, and the supporting system can effectively protect the foundation pit side slope; meanwhile, a vertical column 3 is erected below the joint of the first oblique beam 5 or the second oblique beam 6 and the auxiliary beam 7 through a multidirectional length-adjustable connecting assembly, and a vertical column 3 connected through a connecting assembly is also erected below the reinforcing beam 8 and the supporting beam 4, so that gaps between steel structures can be made up through the connecting assembly, the overall stability of a supporting system is guaranteed as much as possible, the supporting system is more convenient and rapid to install and disassemble, the supporting system can be used for multiple times and can be applied to foundation pits with different areas, and the construction cost is reduced; the horizontal beam 2 and the vertical column 3 are both made of round pipes with the same specification, so that the supporting system can be assembled and disassembled more conveniently and quickly.

Referring to fig. 2, the connecting assembly includes a connecting disc 9 with a regular octagonal cross section, the connecting disc 9 is hollow, and a reinforcing plate (not shown in the figure) shaped like a Chinese character mi is vertically and fixedly connected inside the connecting disc 9, each end of the reinforcing plate is fixedly connected with the inner side wall of a corner line of the side wall of the connecting disc 9, eight planes of the outer side wall of the connecting disc 9 are fixedly connected with connecting columns 10, a stiffening rib 19 is fixedly connected between two adjacent connecting columns 10 on the side wall of the connecting disc 9, the stiffening rib 19 is coplanar with the axis of the connecting column 10, and a plurality of stiffening ribs 19 are coplanar and; be connected with the flexible subassembly that is used for controlling gap between the steel construction between spliced pole 10 and the horizontal beam 2, flexible subassembly includes that the rigid coupling keeps away from the first ring flange 12 of connection pad 9 one end at spliced pole 10, the one end rigid coupling that horizontal beam 2 is close to connection pad 9 has the second ring flange 13 with first ring flange 12 with the specification, the bolt connection is connected with on the first ring flange 12 a plurality of and second ring flange 13 on perforate the high strength bolt 14 of grafting adaptation, high strength bolt 14 is preferred four and is equidistant circumference array distribution with spliced pole 10 axis, there is fastening nut 15 in the equal threaded connection in second ring flange 13 both sides on high strength bolt 14.

When the horizontal beam 2 is installed, the connecting column 10 on the connecting disc 9 and the horizontal beam 2 are positioned on the same horizontal plane, the second flange plate 13 at the end part of the horizontal beam 2 is sleeved on the high-strength bolts 14, two fastening nuts 15 on the same high-strength bolt 14 are arranged on two sides of the second flange plate 13 in rows, the second flange plate 13 can be driven to synchronously slide on the high-strength bolts 14 through rotating the fastening bolts, the horizontal beam 2 and the connecting column 10 are tightened through the bolted connection of the high-strength bolts 14 and the fastening nuts 15 after the fastening bolts are screwed, the effective connection of a gap between the horizontal beam 2 and the connecting column 10 is realized, the support system is more convenient to disassemble after foundation pit excavation is completed, and the steel structure cannot be damaged; the stiffening rib 19 has strengthened the compactness of connecting between a plurality of spliced poles 10 for coupling assembling's structural strength is higher, can carry out effective connection to horizontal beam 2, and the setting of reinforcing plate has strengthened the bulk strength of connection pad 9, has further improved coupling assembling's structural strength.

The middle part rigid coupling that connection pad 9 is close to vertical 3 one end of post has a pressure-bearing post 11, pressure-bearing post 11 is connected with 3 lifts of vertical post, the up end bolt of vertical post 3 is fixed with hydraulic jack 16, the one end rigid coupling that connection pad 9 was kept away from to pressure-bearing post 11 has the cover block 17 with the complete grafting adaptation of hydraulic jack 16's piston rod, the one end horizontal rotation that connection pad 9 kept away from pressure-bearing post 11 is connected with laser pen 18, the laser line that laser pen 18 jetted out is tangent with the department that first ring flange 12 periphery wall is closest to laser pen 18.

When the area of the foundation pit is large, the span of the horizontal beam 2 is increased, the self weight of the horizontal beam 2 drives the horizontal beam 2 to have a tendency of falling, at the moment, the hydraulic jack 16 can be started to effectively support the horizontal beam 2, labor-saving adjustment is facilitated, and the stability of a supporting system is further improved; the specific adjustment mode is that the laser pen 18 is rotated to the axis of the connecting column 10 connected with the horizontal beam 2, and the levelness condition of the horizontal beam 2 after being supported by the vertical column 3 can be judged through the projection form of the laser line emitted by the laser pen 18 on the second flange 13; when the laser line is positioned above the second flange plate 13, the vertical height of the connecting disc 9 is too high, and the hydraulic jack 16 needs to be adjusted to enable the connecting disc 9 to descend until the laser line is tangent to the outer peripheral wall of the second flange plate 13, and at the moment, the connecting disc 9 and the horizontal beam 2 are in the same horizontal plane; when laser rays irradiate on the surface of the second flange plate 13, the vertical column 3 does not effectively support the joint part of the horizontal beam 2 at the moment, the hydraulic jack 16 needs to be adjusted to lift the connecting disc 9, so that the connecting disc 9 and the horizontal beam 2 are in the same horizontal plane, and the convenient detection of the overall stable connection of the steel structure is realized.

The implementation principle and the beneficial effects of the embodiment are as follows:

when a foundation pit side slope is supported, the main beam 1 is arranged at the edge of the upper end of the foundation pit side slope, the supporting beams 4 and the first inclined beams 5 are sequentially arranged to support the main beam 1 opposite to each other and the main beam 1 adjacent to the corner, so that the main beam 1 can provide stable support for the foundation pit side slope, the auxiliary beam 7 is arranged to reinforce the connection between the first inclined beam 5 and the main beam 1, the second inclined beam 6 is arranged to reinforce the connection between the supporting beams 4 and the main beam 1, and the reinforcing beam 8 is arranged to connect the supporting beams 4 into a whole, so that the overall strength of the supporting system is further improved, and the supporting system can effectively protect the foundation pit side slope; meanwhile, the vertical column 3 is erected below the combination part of the first oblique beam 5 or the second oblique beam 6 and the auxiliary beam 7 through the multidirectional length-adjustable connecting assembly, the vertical column 3 connected through the connecting assembly is also erected below the reinforcing beam 8 and the supporting beam 4, and then gaps between steel structures can be made to be connected and compensated through the connecting assembly, the overall stability of a supporting system is guaranteed as far as possible, the supporting system is more convenient and rapid to install and detach, the supporting system can be used for multiple times and can be applied to foundation pits with various different areas, and the construction cost is reduced.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides an assembled foundation ditch prestressing force braced system which characterized in that: including a plurality of girder (1), a plurality of horizontal beam (2) and a plurality of vertical post (3), it is a plurality of girder (1) sets up and encloses synthetic confined frame form along foundation ditch side slope edgewise, horizontal beam (2) include a plurality of supporting beam (4), first sloping (5), second sloping (6), auxiliary beam (7) and reinforcing beam (8), supporting beam (4) are crossed directly over the foundation ditch and bolted connection is in two of relative setting between girder (1), adjacent two at being located the corner are connected in first sloping (5) bolted connection between girder (1), second sloping (6) bolted connection be in supporting beam (4) with between girder (1), girder (1) with first sloping (5) with girder (1) with contained angle between second sloping (6) is 45, first sloping (5) with the position department of second sloping (6) be provided with the girder built on stilts with the position department of girder (1) The auxiliary beam (7) is in bolted connection, a plurality of reinforcing beams (8) are in bolted connection between two adjacent supporting beams (4), a plurality of vertical columns (3) are arranged under the joint part of the first oblique beam (5)/the second oblique beam (6) and the auxiliary beam (7) and under the reinforcing beam (8) and the supporting beam (4), and the horizontal beam (2) and the vertical columns (3) are in bolted connection through a connecting assembly with adjustable multidirectional length.

2. The fabricated foundation pit prestressed supporting system of claim 1, wherein: coupling assembling includes that the cross section is connection pad (9) of regular octagon, the equal rigid coupling in eight planes of connection pad (9) lateral wall has spliced pole (10), spliced pole (10) with be connected with the flexible subassembly that is used for controlling gap between the steel construction between horizontal beam (2), the middle part rigid coupling of connection pad (9) one end has pressure-bearing post (11), pressure-bearing post (11) with vertical post (3) go up and down to be connected.

3. The fabricated foundation pit prestressed supporting system of claim 2, wherein: flexible subassembly includes the rigid coupling is in spliced pole (10) is kept away from the first ring flange (12) of connection pad (9) one end, horizontal beam (2) are close to the one end rigid coupling of connection pad (9) have with the second ring flange (13) of first ring flange (12) with the specification, the bolt joint is connected with a plurality of with high strength bolt (14) of perforation grafting adaptation on second ring flange (13), on high strength bolt (14) in the equal threaded connection in second ring flange (13) both sides has fastening nut (15).

4. The fabricated foundation pit prestressed supporting system of claim 3, wherein: the hydraulic jack (16) is fixedly bolted to the upper end face of the vertical column (3), and a sleeve block (17) which is matched with a piston rod of the hydraulic jack (16) in a complete inserting mode is fixedly connected to one end, far away from the connecting disc (9), of the pressure-bearing column (11).

5. The fabricated foundation pit prestressed supporting system of claim 4, wherein: connection pad (9) are kept away from the one end horizontal rotation of pressure-bearing post (11) is connected with laser pen (18), the laser line that laser pen (18) jetted out with first ring flange (12) periphery wall is closest to one of laser pen (18) is tangent.

6. The fabricated foundation pit prestressed supporting system of claim 2, wherein: the side wall of the connecting disc (9) is fixedly connected with a stiffening rib (19) between two adjacent connecting columns (10), and the stiffening rib (19) is coplanar and parallel to the upper end face of the connecting disc (9).

7. The fabricated foundation pit prestressed supporting system of claim 2, wherein: the connecting disc (9) is hollow, a reinforcing plate in a shape like a Chinese character 'mi' is vertically and fixedly connected inside the connecting disc (9), and each end part of the reinforcing plate is fixedly connected with the inner side wall of a corner line of the side wall of the connecting disc (9) respectively.

8. The fabricated foundation pit prestressed supporting system of claim 2, wherein: the supporting beam (4), the first sloping (5), the second sloping (6), the auxiliary beam (7), the reinforcing beam (8), the connecting column (10) and the pressure-bearing column (11) all adopt the round pipe or the square pipe with the same specification.