Fabricated combined steel trestle structure

Abstract

The utility model relates to the field of constructional engineering, in particular to an assembly type combined steel trestle structure. According to the technical scheme, the device comprises a trestle beam fixedly arranged in a foundation pit; the trestle box is fixedly laid above the trestle beam; and the antiskid panel is fixed on the surface of the trestle box. The foundation pit trestle has the beneficial effects that by arranging the trestle box assembled through the steel structure, rapid mounting and dismounting of the foundation pit trestle are achieved, input of unrecyclable resources and generation of construction waste are greatly reduced, carbon emission is reduced, and transformation and upgrading of the construction industry are promoted.

Description

Technical Field

[0001] The utility model relates to the field of construction engineering, in particular to an assembled combined steel trestle structure. Background Art

[0002] As the scale of urban underground space development continues to expand, the area and number of foundation pit constructions across the country are also increasing each year. The general characteristics of these foundation pits are that the foundation pit area is large, reaching thousands or even tens of thousands of square meters, and the foundation pit depth is large, reaching more than ten meters or even dozens of meters. In order to ensure the stability of the foundation pit support system, the number of foundation pit supports needs to be increased, which makes the excavation of foundation pit earthwork more difficult. In order to solve the problems of difficulty in transporting earthwork during the excavation stage of deep and large foundation pits and the lack of material storage space around the foundation pit during basement construction, a trestle is added to the first support of the foundation pit.

[0003] At present, the trestle slabs of foundation pit trestles are mainly reinforced concrete trestle slabs. During construction, a large number of cushion layers, brackets, formworks, steel bars, concrete and other materials are used. The process is complicated and the construction period is long. After use, they need to be manually broken and solid waste will be generated. On the basis of ensuring the bearing capacity of the trestle slab, it is very necessary to use recyclable turnover materials for the trestle slab and carry out standardized and modular design to achieve rapid installation and disassembly of the foundation pit trestles, reduce the input of non-recyclable resources and the generation of construction waste. Utility Model Content

[0004] The utility model aims to overcome the defects of the prior art and provide an assembled composite steel trestle structure to solve the problem that the existing reinforced concrete trestle slabs have complicated construction procedures and long construction periods during construction and need to be manually broken down after use to form solid waste.

[0005] The utility model provides an assembled combined steel trestle structure, and its technical solution is:

[0006] The invention comprises: a trestle bridge fixedly arranged in a foundation pit; a trestle box fixedly laid on the trestle bridge; and an anti-skid panel fixed on the surface of the trestle box.

[0007] Furthermore, the trestle box includes a plurality of H-shaped steels, a plurality of stiffening ribs and a sealing plate. The plurality of H-shaped steels are fixed in sequence to form a main body. The stiffening ribs are spaced apart on both sides of the web of the H-shaped steel. The sealing plate surrounds the H-shaped steel and is sealed and fixed to the flange plate of the H-shaped steel at the edge.

[0008] Furthermore, grid-like anti-skid patterns are rolled on the surfaces of the upper and lower flange plates of the H-shaped steel.

[0009] Furthermore, the anti-slip panel is a patterned stainless steel plate, and the patterned stainless steel plate is fixedly connected to the sealing plate.

[0010] Furthermore, the anti-slip panel is made of high-density polyethylene or polycarbonate material, a first reserved hole is provided on the anti-slip panel, a bolt hole matching the first reserved hole is provided on the trestle box, and a screw is provided in the bolt hole.

[0011] Furthermore, the end surface around the trestle box is provided with a threaded hole groove which passes through from top to bottom, and the anti-slip panel is provided with a second reserved hole which matches with the threaded hole groove, and the bolt lifting ring used for lifting operation can be installed in the threaded hole groove.

[0012] Furthermore, the end faces around the trestle box are provided with through holes extending from top to bottom, and the anti-slip panel is provided with a U-shaped groove matching the through hole; a U-shaped bolt can pass through the through hole, and baffles and nuts are provided at both ends of the U-shaped bolt. The U-shaped bolt can fix and assemble two adjacent trestle boxes.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] By setting up a trestle box assembled with steel structure, the rapid installation and disassembly of the foundation pit trestle can be achieved, and the input of non-recyclable resources and the generation of construction waste are greatly reduced, carbon emissions are reduced, and the transformation and upgrading of the construction industry is assisted.

[0015] By setting the trestle box into two specifications, a rectangle and an isosceles right triangle, the trestle box can be used in the foundation pit and the corner area of ​​the foundation pit, thereby increasing the scope of application.

[0016] By providing an anti-slip panel, the friction on the surface of the trestle box can be effectively increased, thereby increasing safety.

[0017] By arranging U-bolts, the trestle box can be assembled and at the same time, the trestle box can be fixed on the Bailey frame or the steel beam.

[0018] By arranging seismic isolation measures in the gap between the trestle box and the concrete beam, it is possible to prevent the vibration of the trestle box from causing damage to the concrete beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a schematic diagram showing that the trestle box of the concrete trestle bridge of the assembled composite steel trestle structure is installed.

[0020] Figure 2 It is a top view of a rectangular trestle box of the assembled combined steel trestle structure of the utility model.

[0021] Figure 3 It is the AA section view of the trestle box of the assembled combined steel trestle structure of the utility model.

[0022] Figure 4It is a top view of the anti-skid panel of the assembled combined steel trestle structure of the utility model.

[0023] Figure 5 It is a top view of an isosceles right triangle trestle box of the assembled combined steel trestle structure of the utility model.

[0024] Figure 6 It is a schematic diagram of the connection method of two adjacent trestle boxes of the assembled combined steel trestle structure of the utility model.

[0025] Legend: 1. Through hole; 2. Stiffening rib plate; 3. Limit plate; 4. Bolt hole; 5. Threaded hole groove; 6. Sealing plate; 7. Anti-slip panel; 8. U-shaped groove; 9. First reserved hole; 10. Anti-slip protrusion; 11. Second reserved hole; 12. Reserved groove; 13. Trestle box; 14. U-shaped bolt; 15. Connecting beam; 16. Trestle bridge; 17. Counter-slope. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] See also Figure 1 The utility model provides an assembled composite steel trestle structure. By setting a trestle box assembled with a steel structure, the rapid installation and disassembly of the foundation pit trestle is realized, and the input of non-recyclable resources and the generation of construction waste are greatly reduced, carbon emissions are reduced, and the transformation and upgrading of the construction industry are promoted. By setting the trestle box to two specifications, a rectangle and an isosceles right triangle, the trestle box can be used in the foundation pit and the corner area of ​​the foundation pit, which increases the scope of application. By setting U-bolts, the trestle box can be assembled, and at the same time, the trestle box can be fixed on a Bailey frame or a steel beam. By setting seismic isolation measures in the gap between the trestle box and the concrete beam, the vibration of the trestle box can be prevented from damaging the concrete beam.

[0028] The utility model assembled combined steel trestle box is described below in conjunction with the accompanying drawings.

[0029] See also Figure 1 , showing a schematic diagram of the installation of the trestle box of the concrete trestle bridge of the assembled composite steel trestle structure of the utility model. Figure 2 , showing a top view of the rectangular trestle box body of the assembled combined steel trestle structure of the utility model. Figure 3 , showing the AA section view of the trestle box of the assembled combined steel trestle structure of the utility model. Figure 4 , showing a top view of the anti-skid panel of the assembled composite steel trestle structure of the utility model. Figure 5 , showing a top view of an isosceles right triangle trestle box of the assembled composite steel trestle structure of the utility model. Figure 6The schematic diagram shows the connection mode of two adjacent trestle boxes of the assembled combined steel trestle structure of the utility model.

[0030] Combine the following Figures 1 to 6 , the assembled composite steel trestle structure of the utility model is described.

[0031] like Figures 1 to 6 As shown, the utility model assembled composite steel trestle structure includes:

[0032] A trestle bridge 16 is fixedly installed in the foundation pit; a trestle box 13 is fixedly laid on the trestle bridge 16; and an anti-slip panel 7 is fixed on the surface of the trestle box 13.

[0033] In a specific embodiment, it further includes a connecting beam 15 horizontally fixed on the trestle bridge 16 , and the connecting beam 15 is located below the trestle box 13 .

[0034] In a specific implementation, the trestle box 13 is designed to be rectangular.

[0035] In a specific embodiment, the trestle box 13 is also provided with an isosceles right triangle, which can be used in the corner area of ​​the foundation pit.

[0036] In a specific embodiment, the trestle box 13 includes a plurality of H-shaped steels, a plurality of stiffening ribs 2 and a sealing plate 6. The plurality of H-shaped steels are fixed in sequence to form a main body. The stiffening ribs 2 are spaced apart on both sides of the web of the H-shaped steel. The sealing plate 6 surrounds the H-shaped steel and is sealed and fixed to the flange plate of the H-shaped steel at the edge.

[0037] In a specific embodiment, grid-like anti-skid patterns are rolled on the surfaces of the upper and lower flange plates of the H-shaped steel.

[0038] In a preferred embodiment, the cross-sectional dimensions of the H-beam are H×B×t1×t2, wherein H is the height, B is the width, t1 is the web thickness, t2 is the flange thickness, and the strength grade of the H-beam is not lower than Q345b.

[0039] In a preferred embodiment, a plurality of H-shaped steels are welded and fixed side by side, and the flange plates of two adjacent H-shaped steels are butt-jointed by groove welding, and the upper and lower flange plates need to be subjected to V-shaped groove processing in advance.

[0040] In a preferred embodiment, considering that the fixed length of H-shaped steel is usually 12m, the length of the rectangular trestle board 13 can be set to three modules of 4.5m, 6m and 7.5m for easy processing and use.

[0041] In a preferred embodiment, the trestle box 13 in the form of an isosceles right triangle can be arranged in two modules: 9 and 12 modules with the hypotenuse normal arranged side by side.

[0042] In a preferred embodiment, the interval between two adjacent stiffening ribs 2 is 15 cm, and the stiffening ribs 2 have the same thickness as the web of the H-shaped steel.

[0043] In a preferred embodiment, the sealing plate 6 is a steel plate with a thickness of 10 mm, and the sealing plate 6 is fixed to the flange plate of the H-shaped steel by welding to achieve sealing of the H-shaped steel.

[0044] In a preferred embodiment, the anti-slip panel 7 is a patterned stainless steel plate, and the patterned stainless steel plate is fixedly connected to the sealing plate 6 .

[0045] In a preferred embodiment, the four sides of the patterned stainless steel plate are welded and fixed to the sealing plate 6 .

[0046] In another preferred embodiment, the anti-slip panel 7 is made of high-density polyethylene or polycarbonate material, a first reserved hole 9 is provided on the anti-slip panel 7, a bolt hole 4 matching the first reserved hole 9 is provided on the trestle box 13, and a screw is arranged in the bolt hole 4.

[0047] In a preferred embodiment, a bolt sleeve is provided in the bolt hole 4, the bolt sleeve is fixed to the trestle box 13 by stud welding, and the bolt sleeve is perpendicular to the surface of the main structure of the trestle box 13, and the screw can engage with the bolt sleeve.

[0048] In a preferred embodiment, the first reserved hole 9 is larger at the top and smaller at the bottom, with the upper portion being used to place the screw washer and the lower portion being used for the bolt sleeve to pass through.

[0049] In a preferred embodiment, the surface of the anti-slip panel 7 is provided with anti-slip protrusions 10. If the upper and lower surfaces of the trestle box 13 are both anti-slip, the height of the sealing plate 6 is H1=H+2×B1, where B1 is the thickness of high-density polyethylene or polycarbonate and does not include the thickness of the anti-slip protrusions 10; if only the upper surface of the trestle box 13 is anti-slip, the height of the sealing plate 6 is H1=H+B1.

[0050] In a preferred embodiment, a limit plate 3 is provided at each end of the trestle box 13 at intervals of 1.5 m. The limit plate 3 can facilitate the installation of the anti-slip panel 7 composed of high-density polyethylene or polycarbonate. The limit plate 3 can be made of a 10×5×0.5 cm steel plate, and the limit plate 3 is welded and fixed to the sealing plate 6, and the net height difference between the limit plate 3 and the flange plate of the H-beam is controlled at B1-0.5 cm. For a trestle box 13 in the shape of an isosceles right triangle, the limit plate 3 is fixed on the right angle side, and for a trestle box 13 in the shape of a rectangle, the limit plate 3 is fixed in the direction of the long side.

[0051] In a preferred embodiment, a reserved groove 12 is provided on the anti-slip panel 7 made of high-density polyethylene or polycarbonate, and the reserved groove 12 is engaged with the limiting plate 3 to achieve limiting fixation of the anti-slip panel 7.

[0052] In a specific embodiment, the end surface around the trestle box 13 is provided with a threaded hole groove 5 that passes through from top to bottom, and the anti-slip panel 7 is provided with a second reserved hole 11 that matches the threaded hole groove 5. The threaded hole groove 5 can be installed with a bolt eye for lifting operation.

[0053] In a preferred embodiment, the threaded hole groove 5 is formed by sealing and welding the upper and lower end surfaces of the threaded steel sleeve to the upper and lower flange plates of the H-shaped steel respectively.

[0054] In a preferred embodiment, for a rectangular trestle box 13, the threaded hole grooves 5 are arranged every 1.5 m in the long side direction of the trestle box 13, and two are arranged in the short side direction; for a trestle box 13 in an isosceles right triangle, the threaded hole grooves 5 are distributed in the three corner areas of the trestle box 13.

[0055] In a preferred embodiment, the diameter of the second reserved hole 11 is equal to the inner diameter of the threaded hole groove 5, so that a bolt eye can pass through.

[0056] In a specific embodiment, a guardrail is further included, and a threaded rod is installed at the lower end of the guardrail, and the threaded rod can be matched with the threaded hole groove 5. The guardrail includes a guardrail upright and a guardrail crossbar, and the guardrail upright is provided with a spigot for installing the guardrail crossbar. The threaded rod is installed at the lower end of the guardrail upright, and the threaded rod can be installed in the threaded hole groove 5, thereby realizing the installation and fixation of the guardrail.

[0057] In a specific embodiment, the end surface around the trestle box 13 is provided with a through hole 1 that passes through from top to bottom, and the anti-slip panel 7 is provided with a U-shaped groove 8 that matches the through hole 1; a U-shaped bolt 14 can pass through the through hole 1, and baffles and nuts are provided at both ends of the U-shaped bolt 14. The U-shaped bolt 14 can fix and assemble two adjacent trestle boxes 13.

[0058] In a preferred embodiment, the U-shaped bolt 14 is wrapped with a rubber sleeve to avoid hard contact between the U-shaped bolt and the through hole 1 .

[0059] In a preferred embodiment, the through hole 1 is formed by sealing and welding the upper and lower end surfaces of a non-threaded steel sleeve to the upper and lower flange plates of an H-shaped steel respectively.

[0060] In a preferred embodiment, for the rectangular trestle box 13, two unthreaded through holes 1 are provided in the short side direction, and no less than two unthreaded through holes 1 are provided in the long side direction.

[0061] The utility model also provides a construction method of an assembled composite steel trestle structure, comprising the following steps:

[0062] The trestle bridge 16 is fixedly installed in the foundation pit;

[0063] Assembling the trestle box 13;

[0064] The assembled trestle box 13 is laid on the trestle bridge 16;

[0065] Specifically, when the trestle bridge 16 is a Bailey frame or a steel beam, one end of the U-bolt 14 is passed through the through hole 1 at the end of the trestle box 13, and the other end is inserted into the trestle bridge 16, and then the baffle and nut are installed on the U-bolt 14.

[0066] Specifically, when the trestle bridge 16 is a concrete beam, a counter-step 17 for limiting the trestle box 13 is provided on the side of the trestle bridge 16 , the trestle box 13 is installed on the concrete beam, and seismic isolation measures are provided between the trestle box 13 and the counter-step 17 .

[0067] The specific operation mode of the construction method provided by the utility model is actually implemented as follows:

[0068] The trestle bridge 16 is fixedly installed at a designated position in the foundation pit.

[0069] According to the design requirements of the bearing capacity of the trestle at the construction site, the specifications of the trestle box 13 are selected, and a suitable specification is selected from 4.5m, 6m and 7.5m.

[0070] Select a suitable anti-skid panel 7. When a patterned stainless steel plate is used as the anti-skid panel 7, the patterned stainless steel plate needs to be welded around the sealing plate 6 of the trestle box 13; when a high-density polyethylene or polycarbonate material is used as the anti-skid panel 7, the anti-skid panel 7 needs to be laid flat on the trestle box 13, so that the reserved groove 12 is matched and snapped with the limit plate 3, so that the first reserved hole 9 is matched and aligned with the bolt hole 4, and the second reserved hole 11 is matched and aligned with the threaded hole groove 5, and then the screw is screwed into the bolt hole 4 to fix the anti-skid panel 7. The anti-skid panel 7 has been installed during the production process and does not need to be installed again during the on-site construction process.

[0071] The trestle boxes 13 are assembled and aligned, the two ends of the U-bolt 14 are respectively inserted into the through holes 1 of the two adjacent trestle boxes 13, and then the baffle and the nut are installed on the U-bolt 14, so as to assemble and fix the two adjacent trestle boxes 13 through the U-bolt 14.

[0072] When Bailey frames or steel beams are used as the trestle bridge 16, the assembled trestle box 13 is first laid on the trestle bridge 16, and then one end of the U-bolt 14 is inserted into the through hole 1 at the end of the trestle box 13, and the other end is inserted into the trestle bridge 16, and then the baffle and the nut are installed on the U-bolt 14, so that the U-bolt 14 fixes the trestle box 13 and the trestle bridge 16.

[0073] When a concrete beam is used as the trestle bridge 16, an anti-step 17 is also required to be provided on the lateral side of the trestle bridge 16. The anti-step 17 can limit the assembled trestle box 13 in the lateral direction, which is convenient for installation and can prevent displacement. The assembled trestle box 13 is laid on the concrete beam, and then a seismic isolation measure is provided in the gap between the trestle box 13 and the anti-step 17. The seismic isolation measure can be filled with fine stone concrete or a rubber pad.

[0074] The utility model is described in detail above in conjunction with the embodiments of the drawings. A person skilled in the art can make various variations of the utility model according to the above description. Therefore, some details in the embodiments should not constitute a limitation of the utility model, and the scope of protection of the utility model shall be defined by the scope of the attached claims.

Claims

1. An assembled composite steel trestle structure, characterized in that: include: A trestle bridge (16) fixedly arranged in the foundation pit; A trestle box (13) fixedly laid on the trestle bridge (16); An anti-slip panel (7) fixed on the surface of the trestle box (13); The trestle box (13) comprises a plurality of H-shaped steels, a plurality of stiffening ribs (2) and a sealing plate (6), wherein the plurality of H-shaped steels are fixed in sequence to form a main body, the stiffening ribs (2) are arranged at intervals on both sides of the web of the H-shaped steel, and the sealing plate (6) surrounds the trestle box (13) and is sealed and fixedly connected to the flange plates of the H-shaped steel at the edges.

2. The assembled composite steel trestle structure according to claim 1 is characterized in that: The surfaces of the upper and lower flange plates of the H-shaped steel are rolled with grid-like anti-skid patterns.

3. The assembled composite steel trestle structure according to claim 1 is characterized in that: The anti-slip panel (7) is a patterned stainless steel plate, and the patterned stainless steel plate is fixedly connected to the sealing plate (6).

4. The assembled composite steel trestle structure according to claim 1, characterized in that: The anti-slip panel (7) is made of high-density polyethylene or polycarbonate material, and a first reserved hole (9) is provided on the anti-slip panel (7). A bolt hole (4) matching the first reserved hole (9) is provided on the trestle box (13), and a screw is arranged in the bolt hole (4).

5. The assembled composite steel trestle structure according to claim 4 is characterized in that: The end surface around the trestle box (13) is provided with a threaded hole groove (5) that passes through from top to bottom, and the anti-slip panel (7) is provided with a second reserved hole (11) that matches the threaded hole groove (5), and a bolt eye for lifting operation can be installed in the threaded hole groove (5).

6. The assembled composite steel trestle structure according to claim 4, characterized in that: The end surface around the trestle box (13) is provided with a through hole (1) which passes through from top to bottom, and the anti-slip panel (7) is provided with a U-shaped groove (8) which matches the through hole (1); a U-shaped bolt (14) can pass through the through hole (1), and baffles and nuts are provided at the two ends of the U-shaped bolt (14), and the U-shaped bolt (14) can fix and assemble two adjacent trestle boxes (13).

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