Fabricated formwork support for large-span construction and construction method of fabricated formwork support

Abstract

The invention relates to the technical field of formwork supports, in particular to an assembly type formwork support for large-span construction and a construction method of the assembly type formwork support. The two ends of the cross beam are fixedly connected with the stand columns respectively to form an n-shaped structure. The stand columns and the cross beams are all composed of assembling units, and the number of the assembling units is set according to the height and the span of the assembling type formwork supporting frame. The string structure comprises a support cable clamp, an adjustable supporting rod structure and a steel cable. The adjustable supporting rod structure is arranged below the middle position of the cross beam, the support cable clamp is fixed to the junction of the stand column and the cross beam in the midspan direction of the cross beam, and the steel cable is jointly fixed through the support cable clamp and the adjustable supporting rod structure. The advantages of a string structure and an assembly type structure are combined, and the advantages of rapid construction, high practicability, high space utilization rate and the like are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of formwork frames, and in particular to an assembleable formwork frame for large-span construction and a construction method thereof. Background Art

[0002] Formwork engineering plays a dual key role in construction: it is an important line of defense to ensure the safety of the construction process, and it is also an indispensable cornerstone to ensure the quality of building concrete. In the core link of concrete pouring, the accuracy and stability of formwork erection directly shapes the quality of concrete molding, which in turn profoundly affects the quality and durability of the entire project. Therefore, formwork engineering is regarded as a decisive factor that directly affects the quality of concrete pouring. For those dangerous and large formwork projects with higher risks and challenges, the quality of their formwork engineering is subject to the most stringent test and is required to meet higher standards and levels.

[0003] According to relevant specifications, concrete formwork support projects with a construction height of 5m and above, a span of 10m and above, a total construction load of 10kN / m2 and above, a concentrated line load of 15N / m and above, a height greater than the horizontal projection width of the support and relatively independent and unconnected components are considered dangerous formwork projects and require expert review.

[0004] Traditional large-span dangerous formwork projects mostly use full-height scaffolding as the support system. Although this method can meet construction needs to a certain extent, it has many disadvantages: first, the construction and dismantling process is cumbersome, time-consuming and labor-intensive, which increases manpower and material costs; second, it occupies a large space, which is not conducive to the flexible layout and transportation of the construction site; third, due to the complex structure, improper operation can easily cause safety accidents, posing a safety hazard to the construction. Summary of the invention

[0005] The purpose of the present invention is to provide an assembleable formwork frame for large-span construction and a construction method thereof in order to solve at least one of the above-mentioned technical problems.

[0006] The present invention provides an assembleable formwork frame for large-span construction, comprising: columns, beams and string structures;

[0007] The two ends of the crossbeam are respectively fixedly connected to one of the columns to form a Π-shaped structure; the column includes a column assembly unit, and a plurality of the column assembly units are assembled and connected to form a columnar structure; the crossbeam includes a beam assembly unit, and a plurality of the beam assembly units are assembled and connected to form a beam structure; the number of the column assembly units and the beam assembly units is set according to the height and span of the assembled formwork frame;

[0008] The string-tensioning structure includes a support cable clamp, an adjustable strut structure and a steel cable; the adjustable strut structure is arranged below the middle position of the beam, the support cable clamp is fixed at the junction of the column and the beam near the mid-span direction of the beam, and the steel cable is fixed by the support cable clamp and the adjustable strut structure.

[0009] Furthermore, the column assembly unit comprises a rectangular or cube structure formed by connecting a plurality of vertical hollow tubes, a plurality of horizontal hollow tubes and side supporting hollow tubes;

[0010] A plurality of column horizontal connecting pipes are vertically welded to the vertical hollow pipe and the horizontal hollow pipe, and the ends thereof extend beyond the plane of the column assembly unit; a column connecting pipe threaded hole is provided at the end of the column horizontal connecting pipe; a first threaded hole matching the column connecting pipe threaded hole is provided on the horizontal hollow pipe;

[0011] When two column assembly units need to be connected horizontally, the column horizontal connecting pipe of the first column assembly unit is inserted into the horizontal hollow pipe of the second column assembly unit, and the threaded hole of the column connecting pipe and the first threaded hole are reinforced and connected by bolts;

[0012] When two column assembly units need to be vertically connected, column vertical connecting pipes are respectively inserted into the vertical hollow tubes used for connection of the two column assembly units; second threaded holes are respectively provided at both ends of the column vertical connecting pipe, and column hollow tube threaded holes matching the second threaded holes are provided at both ends of the vertical hollow tube used for connection, and the second threaded holes and the column hollow tube threaded holes are reinforced and connected by bolts.

[0013] Furthermore, the column also includes: a clamp, a column bottom anchor;

[0014] The clamp is used to fix two parallel horizontal or vertical rods between two column assembly units;

[0015] The column bottom anchor is used to fix the horizontal rod on the bottom surface of the column to the ground.

[0016] Furthermore, the column vertical connecting pipe and the clamp provide the interlayer shear bearing capacity of the column, and the calculation formula of the interlayer shear bearing capacity V of the column is as follows:

[0017] V=V 1 +V 2

[0018]

[0019] Among them, V 1 Indicates the shear bearing capacity of the vertical connecting pipe of the column; V 2Indicates the shear bearing capacity of the bolts in the fixture; N 1 Indicates the number of vertical connecting pipes of a single-layer column; f v Indicates the shear strength of the vertical connecting pipe of the column; D indicates the outer diameter of the vertical connecting pipe of the column; d 1 Indicates the inner diameter of the vertical connecting pipe of the column; N 2 Indicates the number of fixtures between column layers; f t Indicates the tensile strength of the bolt in the fixture; d 2 Indicates the diameter of the bolt in the fixture.

[0020] Further, the crossbeam assembly unit comprises a rectangular or cube structure formed by connecting a plurality of vertical hollow tubes, a plurality of horizontal hollow tubes, and support tubes at the top and sides;

[0021] The horizontal hollow tube used for connecting the crossbeam assembly unit is connected to a crossbeam connecting tube at one end and provided with a crossbeam hollow tube threaded hole at the other end, and the crossbeam connecting tube is provided with a crossbeam connecting tube threaded hole matching the crossbeam hollow tube threaded hole;

[0022] When two beam assembly units need to be connected transversely, the beam connecting pipe of the first beam assembly unit is inserted into the horizontal hollow pipe for connection of the second beam assembly unit, and the threaded holes of the beam hollow pipe and the beam connecting pipe are reinforced and connected by bolts.

[0023] Further, the column assembly unit and the beam assembly unit have the same size;

[0024] When the crossbeam assembly unit and the column assembly unit need to be connected, the column horizontal connecting pipe is inserted into the horizontal hollow pipe of the crossbeam assembly unit for connection, and the threaded hole of the crossbeam hollow pipe and the threaded hole of the column connecting pipe are reinforced and connected by bolts; or,

[0025] A third threaded hole matching the threaded hole of the column connecting pipe is provided on the vertical hollow tube for connection on the cross-beam assembly unit; when it is necessary to connect the cross-beam assembly unit and the column assembly unit, the column vertical connecting pipe is inserted into the vertical hollow tube for connection on the cross-beam assembly unit, and the third threaded hole and the threaded hole of the column connecting pipe are reinforced and connected by bolts.

[0026] Furthermore, the support cable clamp comprises: an L-shaped plate, a straight-shaped plate, a cable clamp bolt, and a fixer;

[0027] The L-shaped plate and the straight-shaped plate are fixed by the cable clamp bolts, and the fixer is welded under the straight-shaped plate;

[0028] The fastener is fixedly connected to the steel cable.

[0029] Further, the adjustable strut structure comprises: a strut connecting pipe, a screw jack, a strut cable clamp, and a V-shaped support;

[0030] One end of the brace connecting tube is fixedly connected to the crossbeam assembly unit, and the other end is fixedly connected to the V-shaped support;

[0031] The bottom of the screw jack is welded to the V-shaped support, and the top is welded to the strut cable clamp; the steel cable is connected to the strut cable clamp.

[0032] Furthermore, the adjustable strut structure can adjust the deformation and stress level of the beam by adjusting the screw jack according to the load at any time during the construction. The reasonable shape of the steel cable can be determined according to the following formula:

[0033]

[0034] Among them, N h Indicates the horizontal component of the loaded cable; M mid It represents the mid-span bending moment calculated according to the simply supported beam based on the external load; H represents the maximum height of the one-way beam-string determined according to the empirical span-to-height ratio; f(x) represents the belly height function; M(x) represents the bending moment function calculated according to the simply supported beam based on the external load.

[0035] The present invention also provides a construction method of an assembleable formwork frame for large-span construction, comprising the following steps:

[0036] Factory prefabrication: prefabricate the column assembly unit, beam assembly unit and adjustable brace structure in the factory according to the construction requirements, transport them to the site, and then mark the column layout points on the site;

[0037] Single-layer column assembly: four column assembly units are assembled as a group on site, and several column vertical connecting pipes are pre-fixed to the corresponding vertical hollow pipes for connection of each assembly unit through the threaded holes of the column hollow pipes with bolts, thereby assembling to form several single-layer columns;

[0038] Column positioning and fixing: Place an assembled single-layer column at a confirmed point and fix it to the ground using a column bottom anchor;

[0039] Assembly of upper and lower single-layer columns: hoist a single-layer column so that its vertical hollow tubes for connection are aligned one by one with the column vertical connecting tubes of the previously placed single-layer columns to ensure that the two are accurately connected, and the column hollow tube threaded holes on the vertical hollow tubes for connection are fixedly connected with the second threaded holes on the column vertical connecting tubes by bolts, and then use a clamp to fix the two parallel rods;

[0040] Complete assembly of columns: Repeat the assembly steps of upper and lower single-layer columns until the column height reaches the design requirements;

[0041] The beam assembly is connected with the adjustable strut structure: the beam assembly units are connected through the beam connecting pipe to form two complete beams, and then the two beams are respectively connected with the adjustable strut structure through the strut connecting pipe, and then hoisted on the column;

[0042] Support cable clamp connection: fix the steel cable on the support cable clamp, and then fix the support cable clamp at the junction of the column and the beam; after the support cable clamps on both sides are arranged, connect the steel cable to the adjustable support rod structure, and at the same time adjust the adjustable support rod structure to apply prestress, thereby completing the assembly of the prefabricated formwork frame.

[0043] The beneficial effects of the present invention are:

[0044] 1. Space is left between the columns of the present invention, unlike the full-floor scaffolding that covers the entire working surface, so that construction and transportation vehicles can pass through, which is convenient for personnel to carry out construction and check the deformation of the template at the same time.

[0045] 2. The columns and beams of the present invention can be assembled on site, and only the respective assembly units need to be transported separately during transportation, thus saving material transportation costs.

[0046] 3. The assembly method of the columns and beams of the present invention is simple and easy to understand. It only requires the units to be placed and connected with bolts, thus saving construction time and cost.

[0047] 4. The present invention can adjust the prestress level of the beam through the bolt jack in the adjustable support rod structure. It can be adjusted at any time during the construction, which greatly ensures the safety of the structure and prevents excessive deformation of the template.

[0048] 5. The string structure of the present invention has high strength and small deformation, which is convenient for concrete pouring during construction and maintenance after pouring. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 This is a schematic diagram of the overall structure of an assembleable formwork frame for large-span construction according to an embodiment of the present invention;

[0050] Figure 2 This is a schematic diagram of the structure of a column assembly unit according to an embodiment of the present invention;

[0051] Figure 3 A partial cross-sectional schematic diagram of a column assembly unit according to an embodiment of the present invention;

[0052] Figure 4 This is a schematic diagram of the bottom structure of a column according to an embodiment of the present invention;

[0053] Figure 5 This is a schematic diagram of the structure of a beam assembly unit according to an embodiment of the present invention;

[0054] Figure 6 It is a schematic diagram of the support cable clamp structure according to one embodiment of the present invention;

[0055] Figure 7 A schematic diagram of an adjustable support rod structure according to an embodiment of the present invention;

[0056] Figure 8 It is a schematic diagram of the arrangement structure of the support cable clamp according to one embodiment of the present invention;

[0057] Fig. 9 The present invention is a flowchart of a construction method of an assembled formwork frame for large-span construction according to an embodiment of the present invention.

[0058] In the figure: 1. column; 11. horizontal connecting pipe of column; 12. vertical connecting pipe of column; 13. threaded hole of connecting pipe of column; 14. threaded hole of hollow pipe of column; 15 clamp; 16. anchor of column bottom; 2. crossbeam; 21. connecting pipe of crossbeam; 22. threaded hole of connecting pipe of crossbeam; 23. threaded hole of hollow pipe of crossbeam; 3. support cable clamp; 31. L-shaped plate; 32. straight plate; 33. cable clamp bolt; 34. fastener; 4. adjustable support rod structure; 41. support rod connecting pipe; 42. screw jack; 43. support rod cable clamp; 44. V-shaped support; 5. steel cable. DETAILED DESCRIPTION

[0059] The content of the present invention will now be discussed with reference to exemplary embodiments. It should be understood that the embodiments discussed are only to enable those skilled in the art to better understand and thus implement the content of the present invention, rather than implying any limitation on the scope of the present invention.

[0060] As used herein, the term “including” and variations thereof are to be interpreted as open-ended terms meaning “including, but not limited to.” The term “based on” is to be interpreted as “based, at least in part, on.” The terms “one embodiment” and “an embodiment” are to be interpreted as “at least one embodiment.”

[0061] Embodiment 1

[0062] Figure 1 The overall structure diagram of an assembled formwork frame for large-span construction according to an embodiment of the present invention is shown in FIG. Figure 1 As shown, according to one embodiment of the present invention, an assembleable formwork frame for large-span construction includes: a column 1, a beam 2 and a string structure;

[0063] Both ends of the crossbeam 2 are respectively fixedly connected to a column 1 to form a Π-shaped structure; the column 1 includes a column assembly unit, and a plurality of column assembly units are assembled and connected to form a columnar structure; the crossbeam 2 includes a beam assembly unit, and a plurality of beam assembly units are assembled and connected to form a beam structure; the number of column assembly units and beam assembly units is set according to the height and span of the assembled formwork frame;

[0064] The string structure includes a support cable clamp 3, an adjustable strut structure 4 and a steel cable 5; the adjustable strut structure 4 is arranged below the middle position of the beam 2, the support cable clamp 3 is fixed at the junction of the column 1 and the beam 2 near the mid-span direction of the beam 2, and the steel cable 5 is fixed together by the support cable clamp 3 and the adjustable strut structure 4.

[0065] In this embodiment, the prefabricated formwork frame used for large-span construction includes columns 1, beams 2 and a string structure. The columns 1 are formed by assembling and connecting multiple column assembly units, and the beams 2 are formed by assembling and connecting multiple beam assembly units. The two ends of the beam 2 are respectively fixedly connected to a column 1 to form a Π-shaped structure. The number of column assembly units and beam assembly units is determined according to the height and span of the prefabricated formwork frame that need to be set. The tensioning structure includes a support cable clamp 3, an adjustable strut structure 4 and a steel cable 5; the adjustable strut structure 4 is arranged below the middle position of the beam 2, the support cable clamp 3 is fixed at the junction of the column 1 and the beam 2 close to the mid-span direction of the beam 2, and the steel cable 5 is fixed by the support cable clamp 3 and the adjustable strut structure 4; the tensioning structure is connected to the column 1 and the beam 2 through the support cable clamp 3 and the adjustable strut structure 4, and a reasonable tension and relaxation system is formed by adjusting the cable shape of the steel cable 5 in the tensioning structure, forming a large-span prefabricated formwork frame with strong bearing capacity and applied to large-span dangerous formwork projects.

[0066] The present invention constructs a high-bearing capacity, assembleable formwork frame suitable for large-span construction by modularly assembling columns and beams and combining the adjustability of the string structure, thereby effectively improving construction efficiency and safety.

[0067] Figure 2 This is a schematic diagram of the structure of a column assembly unit according to an embodiment of the present invention; Figure 3 FIG. 1 is a partial cross-sectional schematic diagram of a column assembly unit according to an embodiment of the present invention. Figure 2-3 As shown, according to one embodiment of the present invention, the column assembly unit includes a rectangular or cube structure formed by connecting a plurality of vertical hollow tubes, a plurality of horizontal hollow tubes and side supporting hollow tubes;

[0068] A plurality of column horizontal connecting pipes 11 are vertically welded to the vertical hollow pipe and the horizontal hollow pipe, and the ends thereof extend beyond the plane of the column assembly unit; a column connecting pipe threaded hole 13 is provided at the end of the column horizontal connecting pipe 11; and a first threaded hole matching the column connecting pipe threaded hole 13 is provided on the horizontal hollow pipe;

[0069] When two column assembly units need to be connected horizontally, the column horizontal connecting pipe 11 of the first column assembly unit is inserted into the horizontal hollow pipe of the second column assembly unit, and the column connecting pipe threaded hole 13 and the first threaded hole are reinforced and connected by bolts;

[0070] When two column assembly units need to be vertically connected, the column vertical connecting pipes 12 are respectively inserted into the vertical hollow tubes used for connection of the two column assembly units; second threaded holes are respectively provided at both ends of the column vertical connecting pipe 12, and column hollow tube threaded holes 14 matching the second threaded holes are provided at both ends of the vertical hollow tube used for connection, and the second threaded holes and the column hollow tube threaded holes 14 are reinforced and connected by bolts.

[0071] In this embodiment, the column assembly unit includes four vertical hollow tubes arranged in parallel with each other, four horizontal hollow tubes arranged in parallel with each other, and side support hollow tubes; the vertical hollow tubes, horizontal hollow tubes and side support hollow tubes are connected to each other to form a cube structure; the side support hollow tubes are arranged on four longitudinal surfaces, one of which has two adjacent lateral supports as X-shaped supports, and one of which has two adjacent lateral supports as single oblique supports; the four column horizontal connecting tubes 11 are vertically welded to the vertical hollow tubes and the horizontal hollow tubes; the four column horizontal connecting tubes 11 all extend beyond the same plane of the column assembly unit;

[0072] The end of the column horizontal connecting pipe 11 extending beyond the plane of the column assembly unit is provided with a column connecting pipe threaded hole 13, and the horizontal hollow pipe is provided with a first threaded hole matching the column connecting pipe threaded hole 13; the column horizontal connecting pipe 11 of the first column assembly unit is sleeve-connected with the horizontal hollow pipe of the second column assembly unit, and the first column assembly unit and the second column assembly unit are reinforced and connected by bolts penetrating through the column connecting pipe threaded hole 13 and the first threaded hole on the horizontal hollow pipe; the first column assembly unit and the second column assembly unit are two column assembly units connected transversely;

[0073] A column vertical connecting pipe 12 is sleeved in the vertical hollow pipe for connection, column hollow pipe threaded holes 14 are arranged at both ends of the vertical hollow pipe for connection, and second threaded holes matching the column hollow pipe threaded holes 14 are arranged at both ends of the column vertical connecting pipe 12; the vertical hollow pipe connected by the first column assembly unit and the vertical hollow pipe connected by the third column assembly unit are vertically detachably connected through the column vertical connecting pipe 12;

[0074] The first column assembly unit and the third column assembly unit are reinforced and connected by passing bolts through the threaded holes 14 of the column hollow tube and the second threaded holes on the vertical hollow tube used for connection.

[0075] The column assembly unit is composed of four vertical hollow tubes, four horizontal hollow tubes and side supporting hollow tubes, among which the adjacent two-sided lateral supports are X-shaped supports, and the adjacent two-sided supports are single diagonal supports, which are connected by welding; the vertical and horizontal hollow tubes used for connection are provided with threaded holes; two adjacent column assembly units are connected by connecting pipes which are sleeved into the column hollow tubes, and the connection is reinforced by bolts after the threaded holes of the two tubes are aligned; four column assembly units are connected to form a single-layer column structure, which is a square structure when viewed from above. The entire structure has only one column assembly unit. The column vertical connecting pipe 12 can be assembled on the top of the column assembly unit and is not welded to the column assembly unit as a whole; the column horizontal connecting pipe 11 is welded to the side of the column assembly unit; the column vertical connecting pipe 12 is assembled in the column assembly unit by bolts. After removing the bolts, the column vertical connecting pipe 12 can be removed, which is convenient for disassembly of the column after demolding; the column vertical connecting pipe 12 is provided with two threaded holes for longitudinal connection between column assembly units; the column horizontal connecting pipe 11 is provided with a threaded hole for planar connection between column assembly units.

[0076] The column assembly unit of the present invention realizes flexible horizontal and vertical connection between units, and is reinforced by threaded holes and bolts. It is not only structurally stable, but also easy to disassemble and reassemble, which significantly improves the flexibility and efficiency of column assembly and is suitable for the rapid construction of various buildings and engineering structures.

[0077] Figure 4 FIG. 1 is a schematic diagram of the bottom structure of a column according to an embodiment of the present invention. Figure 4 As shown, according to one embodiment of the present invention, the column 1 further includes: a clamp 15, a column bottom anchor 16;

[0078] The clamp 15 is used to fix two horizontal or vertical rods parallel to each other between two column assembly units;

[0079] The column bottom anchor 16 is used to fix the horizontal rod at the bottom surface of the column 1 to the ground.

[0080] In this embodiment, in order to enhance the stability of the connection between the column assembly units, two parallel horizontal or vertical rods between two adjacent column assembly units are fixedly connected by a clamp 15; the horizontal rod on the bottom surface of the column 1 is fixed to the ground by a column bottom anchor 16 to improve the stability of the column 1.

[0081] The clamp 15 can be a clamp type clamp or a snap clamp, and the specific form is not limited as long as it can achieve the effect of fixed connection. For example: the clamp 15 is a ring-shaped or U-shaped clamp, and its inner diameter is slightly larger than the outer diameter of the horizontal or vertical rod to be fixed. The clamp 15 is made of high-strength steel or aluminum alloy to ensure sufficient strength and durability. Bolt holes are provided at both ends of the clamp, and the bolts passing through the bolt holes and the matching nuts are fastened to firmly hold the rod to achieve fixation; or, the clamp 15 is two or more openable snap parts, each of which has a groove matching the shape of the rod. The clamp 15 is made of high-strength steel or alloy, and the snap parts are closed by springs or manual operation, and the stability is ensured by internal locking mechanisms (such as locks, pins, etc.).

[0082] The column bottom anchor 16 can adopt an expansion bolt type anchor or an "anchor bolt + pressure plate" type anchor; for example, the column bottom anchor 16 includes an expansion bolt, the bolt head has a thread, the rod has an expandable sleeve, the bolt is screwed into a pre-drilled hole, as the bolt is screwed in, the sleeve gradually expands and fills the hole, forming a strong anchoring force; or, the column bottom anchor 16 is composed of anchor bolts, nuts, pressure plates and washers, the anchor bolts are pre-buried in the concrete foundation or directly fixed on the solid ground, the horizontal rods on the bottom of the column are placed on the pressure plate, and then the anchor bolts are passed through the reserved holes on the pressure plate and the rods, and finally tightened with nuts, and washers are used to disperse pressure and prevent loosening. In actual applications, the column bottom anchor 16 can be adjusted and optimized according to specific needs.

[0083] The present invention significantly enhances the stability of the column assembly unit and the ground fixation of the entire column, and improves the structural strength and safety of the entire assembleable formwork frame.

[0084] According to one embodiment of the present invention, the column vertical connecting pipe 12 and the clamp 15 provide the shear bearing capacity between the layers of the column 1. The calculation formula of the shear bearing capacity V between the layers of the column 1 is as follows:

[0085] V=V 1 +V 2

[0086]

[0087] Among them, V 1 V represents the shear bearing capacity of the vertical connecting pipe 12 of the column; 2 Indicates the shear bearing capacity of the bolts in the clamp 15; N 1 Indicates the number of vertical connecting pipes 12 of the single-layer column; f v represents the shear strength of the column vertical connecting pipe 12; D represents the outer diameter of the column vertical connecting pipe 12; d 1 Indicates the inner diameter of the vertical connecting pipe 12 of the column; N2 Indicates the number of column interlayer clamps 15; f t Indicates the tensile strength of the bolt in the clamp 15; d 2 Indicates the diameter of the bolt in the clamp 15.

[0088] In this embodiment, the column vertical connecting pipe 12 and the clamp 15 in the column provide the shear bearing capacity between the layers of the column 1. When selecting and designing the column vertical connecting pipe 12 and the clamp 15, the shear bearing capacity requirements between the layers need to be fully considered.

[0089] The present invention effectively enhances the shear resistance of the column structure in the vertical direction and improves the stability and safety of the overall structure by accurately calculating the shear bearing capacity provided by the column vertical connecting pipes and the clamps between the column layers and selecting materials and designing accordingly.

[0090] Figure 5 FIG. 1 is a schematic diagram of a crossbeam assembly unit structure according to an embodiment of the present invention. Figure 5 As shown, according to one embodiment of the present invention, the beam assembly unit includes a rectangular or cube structure formed by connecting a plurality of vertical hollow tubes, a plurality of horizontal hollow tubes, and support tubes at the top and sides;

[0091] The horizontal hollow tube used for connecting the beam assembly unit is connected to a beam connecting tube 21 at one end and provided with a beam hollow tube threaded hole 23 at the other end. The beam connecting tube 21 is provided with a beam connecting tube threaded hole 22 matching the beam hollow tube threaded hole 23.

[0092] When two beam assembly units need to be connected transversely, the beam connecting pipe 21 of the first beam assembly unit is inserted into the horizontal hollow pipe for connection of the second beam assembly unit, and the beam hollow pipe threaded hole 23 and the beam connecting pipe threaded hole 22 are reinforced and connected by bolts.

[0093] In this embodiment, the crossbeam 2 mainly includes a crossbeam assembly unit, which is composed of four vertical hollow tubes, four horizontal hollow tubes, and top and side support tubes, one of which has two side supports facing each other as X-shaped supports, the other has two side supports facing each other as single diagonal supports, and the top support is an X-shaped support, which is connected by welding; two adjacent crossbeam assembly units are connected to the crossbeam hollow tube through the side crossbeam connecting tube 21, and the threaded holes of the two tubes are aligned and then reinforced by bolts;

[0094] The two beam assembly units are laterally connected through their unique connection design: at one end, the beam connecting tube of the first unit is precisely inserted into the horizontal hollow tube of the second unit; at the other end, bolts are used to pass through the matching threaded holes of the beam hollow tube and the threaded holes of the beam connecting tube to fasten the two to form a stable connection structure.

[0095] The present invention realizes a rapid and stable transverse connection between the beam assembly units, and enhances the overall strength and flexibility of the structure through modular design and precise threaded connection.

[0096] According to one embodiment of the present invention, the column assembly unit and the beam assembly unit have the same size;

[0097] When the crossbeam assembly unit and the column assembly unit need to be connected, the column horizontal connecting pipe 11 is inserted into the horizontal hollow pipe used for connection of the crossbeam assembly unit, and the threaded hole 23 of the crossbeam hollow pipe and the threaded hole 13 of the column connecting pipe are reinforced and connected by bolts; or,

[0098] A third threaded hole matching the threaded hole 13 of the column connecting pipe is provided on the vertical hollow tube used for connection on the cross-beam assembly unit; when it is necessary to connect the cross-beam assembly unit and the column assembly unit, the column vertical connecting pipe 12 is inserted into the vertical hollow tube used for connection on the cross-beam assembly unit, and the third threaded hole and the threaded hole 13 of the column connecting pipe are reinforced and connected by bolts.

[0099] In this embodiment, the column 1 and the beam 2 are connected by aligning four column vertical connecting tubes 12 at the top of the column with the vertical hollow rods in the beam assembly unit one by one, and are reinforced by bolts.

[0100] The present invention realizes fast and flexible assembly and reinforcement through a standardized column and beam assembly unit connection design, thereby enhancing the stability and modular advantages of the overall structure.

[0101] Figure 6 This is a schematic diagram of a support cable clamp structure according to an embodiment of the present invention. Figure 8 FIG. 1 is a schematic diagram of a support cable clamp arrangement structure according to an embodiment of the present invention. Figure 6 and Figure 8 As shown, according to one embodiment of the present invention, the support cable clamp 3 includes: an L-shaped plate 31, a straight plate 32, a cable clamp bolt 33, and a fixer 34;

[0102] The L-shaped plate 31 is fixed to the straight-shaped plate 32 by means of cable clamp bolts 33, and the fixing device 34 is welded to the lower part of the straight-shaped plate 32;

[0103] The fastener 34 is fixedly connected to the steel cable 5 .

[0104] In this embodiment, the support cable clamp 3 includes an L-shaped plate 31, a straight plate 32, a cable clamp bolt 33, and a fixer 34; the L-shaped plate 31 and the straight plate 32 are fixed by the cable clamp bolt 33 to form a stable triangular structure; the support cable clamp 3 is fixed by placing the L-shaped plate 31 and the straight plate 32 at the junction of the column 1 and the beam 2, and the cable clamp bolt 33 is used to fix them after the bolt holes on the edges of the two are aligned.

[0105] The support cable clamp design of the present invention utilizes a stable triangular structure and bolt fixation to achieve a firm connection between the column and the beam, thereby enhancing the stability and load-bearing capacity of the overall structure.

[0106] Figure 7 FIG. 1 is a schematic diagram of an adjustable support rod structure according to an embodiment of the present invention. Figure 7 As shown, the adjustable strut structure 4 includes: a strut connecting pipe 41, a screw jack 42, a strut cable clamp 43, and a V-shaped support 44;

[0107] One end of the support rod connecting tube 41 is fixedly connected to the crossbeam assembly unit, and the other end is fixedly connected to the V-shaped support 44;

[0108] The bottom of the screw jack 42 is welded to the V-shaped support 44 , and the top is welded to the strut cable clamp 43 ; the steel cable 5 is connected to the strut cable clamp 43 .

[0109] In this embodiment, the string structure is connected to the column 1 and the beam 2 through the support cable clamp 3 and the adjustable strut structure 4, wherein the adjustable strut structure 4 and the beam 2 are connected by aligning the strut connecting tube 41 in the adjustable strut structure 4 with the vertical hollow tube in the beam assembly unit, and the connection is reinforced by bolts; the shape of the steel cable 5 is adjusted by adjusting the screw jack 42. Preferably, the adjustable strut structure 4 can adjust the deformation and stress level of the beam 2 by adjusting the screw jack 42 according to the load at any time during the construction, and the reasonable shape of the steel cable 5 can be determined according to the following formula:

[0110]

[0111]

[0112] Among them, N h Indicates the horizontal component of the loaded cable; M mid It represents the mid-span bending moment calculated according to the simply supported beam based on the external load; H represents the maximum height of the one-way beam-string determined according to the empirical span-to-height ratio; f(x) represents the belly height function; M(x) represents the bending moment function calculated according to the simply supported beam based on the external load.

[0113] The adjustable strut structure of the present invention is combined with a screw jack to achieve dynamic adjustment of the shape of the steel cables in the tensioned structure, thereby enhancing the structural stability, flexibility and adaptability, while improving the bearing capacity and deformation control accuracy of the overall structure, providing an effective means for load regulation during construction.

[0114] Embodiment 2

[0115] like Figures 1 to 8As shown, according to one embodiment of the present invention, an assembleable formwork frame for large-span construction includes a column 1, a beam 2 and a string structure;

[0116] The column 1 includes a column assembly unit and a clamp 15; wherein the column assembly unit is composed of four vertical hollow tubes, four horizontal hollow tubes and side support hollow tubes, wherein one adjacent two-side lateral support is an X-shaped support, and one adjacent two-side support is a single diagonal support, which is connected by welding; wherein the vertical and horizontal hollow tubes used for connection are provided with threaded holes; two adjacent column assembly units are connected by sleeves in the column hollow tubes through connecting pipes, and the threaded holes of the two tubes are aligned and then reinforced by bolts; four column assembly units are connected to form a single-layer column structure, which is a square structure in a top view; the clamp 15 fixes two parallel horizontal or vertical rods between two column assembly units; the horizontal rod on the bottom of the column is fixed to the ground using a column bottom anchor 16;

[0117] The crossbeam 2 mainly includes a crossbeam assembly unit, which is composed of four vertical hollow tubes, four horizontal hollow tubes, and top and side support tubes. The two side supports facing one of them are X-shaped supports, the two side supports facing the other are single diagonal supports, and the top support is an X-shaped support, which are connected by welding; two adjacent crossbeam assembly units are connected to the crossbeam hollow tube through the side crossbeam connecting tube 21, and the threaded holes of the two tubes are aligned and then reinforced by bolts;

[0118] The string structure includes a support cable clamp 3, an adjustable strut structure 4 and a steel cable 5; the support cable clamp 3 is fixed at the junction of the column 1 and the crossbeam 2 near the mid-span direction of the crossbeam, and the steel cable 5 is fixed by the support cable clamp 3 and the adjustable strut structure 4;

[0119] like Figures 1 to 3 As shown, the column 1 and the beam 2 are connected by aligning the four column vertical connecting tubes 12 at the top of the column with the vertical hollow tubes in the beam assembly unit, and are reinforced by bolts; Figure 1 and Figure 7 As shown, the string structure is connected to the column 1 and the cross beam 2 through the support cable clamp 3 and the adjustable strut structure 4, wherein the adjustable strut structure 4 and the cross beam 2 are connected by aligning the strut connecting tube 41 in the adjustable strut structure 4 with the vertical hollow tube in the cross beam assembly unit, and the connection is reinforced by bolts;

[0120] like Figures 2 to 5As shown, the entire structure has only one column assembly unit and a beam assembly unit; the column vertical connecting pipe 12 can be assembled on the top of the column assembly unit, and is not welded to the column assembly unit as a whole; the column horizontal connecting pipe 11 is welded to the side of the column assembly unit; the column vertical connecting pipe 12 is assembled in the column assembly unit by bolts, and the column vertical connecting pipe 12 can be removed after the bolts are removed, which is convenient for disassembly of the column after demoulding;

[0121] The column vertical connection pipe 12 is provided with two threaded holes for connecting the column assembly units in the longitudinal direction; the column horizontal connection pipe 11 is provided with one threaded hole for connecting the column assembly units in the plane direction;

[0122] The shear bearing capacity V between the columns 1 is provided by the column vertical connecting pipe 12 and the clamp 15. The calculation formula of V is as follows:

[0123] V=V 1 +V 2

[0124]

[0125] Among them, V 1 V is the shear bearing capacity of the vertical connecting pipe 12 of the column; 2 is the shear bearing capacity of the bolt in the fixture 15; N 1 is the number of vertical connecting pipes 12 of the single-layer column; f v is the shear strength of the column vertical connecting pipe 12; D is the outer diameter of the column vertical connecting pipe 12; d 1 N is the inner diameter of the vertical connecting pipe 12 of the column; 2 is the number of the column interlayer clamps 15; f t is the tensile strength of the bolt in the clamp 15; d 2 is the diameter of the bolt;

[0126] like Figure 6 As shown, the support cable clamp 3 is composed of an L-shaped plate 31, a straight plate 32, a cable clamp bolt 33, and a fixer 34; the L-shaped plate 31 and the straight plate 32 are fixed by the cable clamp bolt 33, and the fixer 34 is welded under the straight plate 32;

[0127] The support cable clamp 3 is formed by placing an L-shaped plate 31 and a straight-shaped plate 32 at the junction of the column 1 and the beam 2, and fixing them with the cable clamp bolts 33 after the bolt holes on the edges of the two are aligned;

[0128] like Figure 7 As shown, the adjustable strut structure 4 is composed of a strut connecting pipe 41, a screw jack 42, a strut cable clamp 43 and a V-shaped support 44; the base of the screw jack 42 is welded to the V-shaped support 44, and the top is welded to the strut cable clamp 43;

[0129] The adjustable support rod structure 4 can adjust the deformation and stress level of the beam 2 by adjusting the screw jack 42 according to the load at any time during the construction. The reasonable cable shape of the steel cable 5 can be determined according to the following formula:

[0130]

[0131] In the above formula, N h M is the horizontal component of the loaded cable; mid is the mid-span bending moment calculated according to the simply supported beam based on the external load; H is the maximum height of the one-way tensioned beam (crossbeam) determined based on the empirical span-to-height ratio; f(x) is the belly height function; M(x) is the bending moment function calculated according to the simply supported beam based on the external load.

[0132] Embodiment 3

[0133] Fig. 9 The flowchart of the construction method of the assembleable formwork frame for large span construction according to one embodiment of the present invention is shown in FIG. Fig. 9 As shown, according to one embodiment of the present invention, a construction method of an assembled formwork frame for large-span construction includes the following steps:

[0134] Step 1, factory prefabrication: prefabricate the column assembly unit, beam assembly unit and adjustable support rod structure 4 in the factory according to the construction requirements, transport them to the site, and then mark the site to confirm the layout points of the columns 1;

[0135] Step 2, single-layer column assembly: assemble four column assembly units as a group on site, and pre-fix a plurality of column vertical connecting pipes 12 to the corresponding vertical hollow pipes for connection of each assembly unit through the column hollow pipe threaded holes 14 with bolts, thereby assembling to form a plurality of single-layer columns;

[0136] Step 3, column positioning and fixing: place an assembled single-layer column at a confirmed point and fix it to the ground using a column bottom anchor 16;

[0137] Step 4, assembling the upper and lower single-layer columns: hoist a single-layer column so that its vertical hollow tubes for connection are aligned one by one with the column vertical connecting tubes 12 of the previously placed single-layer columns to ensure that the two are accurately connected, and the column hollow tube threaded holes 14 on the vertical hollow tubes for connection are fixedly connected with the second threaded holes on the column vertical connecting tubes 12 by bolts, and then the two parallel rods are fixed with the clamps 15;

[0138] Step 5, complete assembly of the columns: repeat the assembly steps of the upper and lower single-layer columns until the height of column 1 reaches the design requirements;

[0139] Step 6, crossbeam assembly and connection with adjustable strut structure: connect the crossbeam assembly units through the crossbeam connecting pipe 21 to form two complete crossbeams 2, and then connect the two crossbeams 2 to the adjustable strut structure 4 through the strut connecting pipe 41 respectively, and then hoist them on the column;

[0140] Step 7, support cable clamp connection: fix the steel cable 5 on the support cable clamp 3, and then fix the support cable clamp 3 at the junction of the column 1 and the beam 2; after the support cable clamps 3 on both sides are arranged, connect the steel cable 5 to the adjustable support rod structure 4, and at the same time adjust the adjustable support rod structure 4 to apply prestress, thereby completing the assembly of the prefabricated formwork frame.

[0141] The present invention realizes the simplicity of construction and dismantling through the assembleable unit structure and adjustable string technology, significantly reduces the construction space occupied, and greatly improves the bearing capacity and construction efficiency. The present invention not only facilitates construction transportation, but also significantly improves the construction quality and flexibility, and effectively solves the problems of large space occupation and insufficient bearing capacity in traditional formwork projects.

[0142] Embodiment 4

[0143] According to one embodiment of the present invention, a construction method of an assembled formwork frame for large-span construction comprises the following steps:

[0144] Step 1: Prefabrication in factory: prefabricate the column assembly unit, beam assembly unit and adjustable strut structure 4 in the factory according to the construction requirements, transport them to the site, and then mark the site to confirm the arrangement points of the columns 1;

[0145] Step 2, single-layer column assembly: four column assembly units are assembled as a group on site, and several column vertical connecting pipes are pre-fixed to the corresponding vertical hollow pipes of each assembly unit through the column hollow pipe threaded holes 14 with bolts, thereby assembling to form several single-layer columns 1.

[0146] Step 3, column positioning and fixing: place an assembled single-layer column at a confirmed point and fix it with a column bottom anchor 16;

[0147] Step 4, assembling the upper and lower single-layer columns: hoist a single-layer column 1, aligning its hollow tubes with the column connecting tubes of the previously placed single-layer columns, to ensure that the two are accurately connected. Bolt the hollow tubes of the columns and the threaded holes of the vertical connecting tubes 12 of the columns, and then use the clamp 15 to fix the two parallel rods;

[0148] Step 5: Complete assembly of the column: Repeat step 4 until the column height reaches the design requirement.

[0149] Step 6, crossbeam assembly and connection with adjustable strut structure: connect the crossbeam assembly units through the crossbeam connecting pipe to form two complete crossbeams 2, and then connect the two crossbeams 2 to the adjustable strut structure 4 through the strut connecting pipe 41 respectively, and then hoist them on the column after completion;

[0150] Step 7, support cable clamp connection: fix the steel cable 5 to the support cable clamp 3, and then fix the support cable clamp 3 to the junction of the column 1 and the beam 2; after the support cable clamps 3 on both sides are arranged, connect the steel cable 5 to the adjustable support rod structure 4, and adjust the adjustable support rod structure 4 to apply prestress, thereby completing the assembly of the prefabricated formwork frame;

[0151] Step 8, laying the cap beam: erecting the cap beam on the top of the beam 2, curing the cap beam, and then laying the formwork;

[0152] Step 9, dismantle the assembled formwork: after the maintenance of the cap beam is completed, dismantle the formwork, first adjust the adjustable strut structure to loosen the steel cable 5, and then remove the adjustable strut structure and the support cable clamp 3; remove the two bolts of the vertical connecting pipes 12 of all the top columns, release the fixation of all the vertical connecting pipes 12 of the top columns, slide the crossbeam 2 out of the column cross section, and then lower it to the ground as a whole; finally, release the fixation of all the remaining vertical connecting pipes 12 of the columns, and remove the columns 1 from top to bottom in turn.

[0153] The present invention realizes the rapid and flexible erection and dismantling of large-span construction formwork frames by combining factory prefabrication with on-site assembly; it not only improves construction efficiency and reduces on-site workload, but also enhances the structural stability and safety of the formwork frame through the application of adjustable support rod structures and support cable clamps; the modular design facilitates transportation, storage and reuse, reduces construction costs, shortens construction period, and demonstrates significant economic and technical benefits.

[0154] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described devices and equipment can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0155] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

[0156] It should be understood that the size of the serial numbers of each step in the content of the invention and the embodiments of the present invention does not absolutely mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

Claims

1. An assembled formwork frame for large-span construction, characterized in that: include: Columns (1), beams (2) and string structures; The two ends of the crossbeam (2) are respectively fixedly connected to one of the columns (1) to form a Π-shaped structure; the column (1) comprises a column assembly unit, and a plurality of the column assembly units are assembled and connected to form a columnar structure; the crossbeam (2) comprises a beam assembly unit, and a plurality of the beam assembly units are assembled and connected to form a beam structure; the number of the column assembly units and the beam assembly units is set according to the height and span of the assembled formwork frame; The string-tensioning structure comprises a support cable clamp (3), an adjustable strut structure (4) and a steel cable (5); the adjustable strut structure (4) is arranged below the middle position of the crossbeam (2); the support cable clamp (3) is fixed at the junction of the column (1) and the crossbeam (2) in the mid-span direction of the crossbeam (2); and the steel cable (5) is fixed by the support cable clamp (3) and the adjustable strut structure (4).

2. The assembleable formwork frame for large-span construction according to claim 1 is characterized in that: The column assembly unit comprises a rectangular or cube structure formed by connecting a plurality of vertical hollow tubes, a plurality of horizontal hollow tubes and side supporting hollow tubes; A plurality of column horizontal connecting pipes (11) are vertically welded to the vertical hollow pipe and the horizontal hollow pipe, and the ends thereof extend beyond the plane of the column assembly unit; a column connecting pipe threaded hole (13) is provided at the end of the column horizontal connecting pipe (11); and a first threaded hole matching the column connecting pipe threaded hole (13) is provided on the horizontal hollow pipe; When two column assembly units need to be connected transversely, the column horizontal connecting pipe (11) of the first column assembly unit is inserted into the horizontal hollow pipe of the second column assembly unit, and the column connecting pipe threaded hole (13) and the first threaded hole are reinforced and connected by bolts; When two column assembly units need to be vertically connected, column vertical connecting pipes (12) are respectively inserted into the vertical hollow tubes used for connection of the two column assembly units; second threaded holes are respectively provided at both ends of the column vertical connecting pipe (12), and column hollow tube threaded holes (14) matching the second threaded holes are provided at both ends of the vertical hollow tube used for connection, and the second threaded holes and the column hollow tube threaded holes (14) are reinforced and connected by bolts.

3. The assembleable formwork frame for large-span construction according to claim 2, characterized in that: The column (1) further comprises: a clamp (15), a column bottom anchor (16); The clamp (15) is used to fix two horizontal or vertical rods parallel to each other between two column assembly units; The column bottom anchor (16) is used to fix the horizontal rod on the bottom surface of the column (1) to the ground.

4. The assembleable formwork frame for large-span construction according to claim 3 is characterized in that: The column vertical connecting pipe (12) and the clamp (15) provide the interlayer shear bearing capacity of the column (1). The calculation formula of the interlayer shear bearing capacity V of the column (1) is as follows: V=V1+V2 Wherein, V1 represents the shear bearing capacity of the column vertical connection pipe (12); V2 represents the shear bearing capacity of the bolts in the clamp (15); N1 represents the number of column vertical connection pipes (12) in a single-layer column; f v represents the shear strength of the column vertical connecting pipe (12); D represents the outer diameter of the column vertical connecting pipe (12); d1 represents the inner diameter of the column vertical connecting pipe (12); N2 represents the number of column interlayer clamps (15); f t represents the tensile strength of the bolt in the clamp (15); d2 represents the diameter of the bolt in the clamp (15).

5. The assembleable formwork frame for large-span construction according to claim 2 is characterized in that: The crossbeam assembly unit comprises a rectangular or cube structure formed by connecting a plurality of vertical hollow tubes, a plurality of horizontal hollow tubes, and support tubes at the top and sides; One end of the horizontal hollow tube used for connecting the crossbeam assembly unit is connected to a crossbeam connecting tube (21), and the other end is provided with a crossbeam hollow tube threaded hole (23); the crossbeam connecting tube (21) is provided with a crossbeam connecting tube threaded hole (22) matching the crossbeam hollow tube threaded hole (23); When two beam assembly units need to be connected transversely, the beam connecting pipe (21) of the first beam assembly unit is inserted into the horizontal hollow pipe for connection of the second beam assembly unit, and the threaded hole (23) of the beam hollow pipe and the threaded hole (22) of the beam connecting pipe are reinforced and connected by bolts.

6. The assembleable formwork frame for large-span construction according to claim 5 is characterized in that: The column assembly unit and the beam assembly unit have the same size; When it is necessary to connect the crossbeam assembly unit and the column assembly unit, the column horizontal connecting pipe (11) is inserted into the horizontal hollow pipe of the crossbeam assembly unit for connection, and the threaded hole (23) of the crossbeam hollow pipe and the threaded hole (13) of the column connecting pipe are reinforced and connected by bolts; or, A third threaded hole matching the threaded hole (13) of the column connecting pipe is provided on the vertical hollow tube for connection on the cross beam assembly unit; when it is necessary to connect the cross beam assembly unit with the column assembly unit, the column vertical connecting pipe (12) is inserted into the vertical hollow tube for connection on the cross beam assembly unit, and the third threaded hole and the threaded hole (13) of the column connecting pipe are reinforced and connected by bolts.

7. The assembleable formwork frame for large-span construction according to claim 1, characterized in that: The support cable clamp (3) comprises: an L-shaped plate (31), a straight-shaped plate (32), a cable clamp bolt (33), and a fixer (34); The L-shaped plate (31) and the straight-shaped plate (32) are fixed by means of the cable clamp bolts (33), and the fixer (34) is welded below the straight-shaped plate (32); The fixer (34) is fixedly connected to the steel cable (5).

8. The assembleable formwork frame for large-span construction according to claim 1, characterized in that: The adjustable support rod structure (4) comprises: a support rod connecting pipe (41), a screw jack (42), a support rod cable clamp (43), and a V-shaped support (44); One end of the brace connecting tube (41) is fixedly connected to the crossbeam assembly unit, and the other end is fixedly connected to the V-shaped support (44); The bottom of the screw jack (42) is welded to the V-shaped support (44), and the top is welded to the support rod cable clamp (43); the steel cable (5) is connected to the support rod cable clamp (43).

9. The assembleable formwork frame for large-span construction according to claim 8, characterized in that: The adjustable support rod structure (4) can adjust the deformation and stress level of the beam (2) by adjusting the screw jack (42) according to the load at any time during the construction. The reasonable cable shape of the steel cable (5) can be determined according to the following formula: Among them, N h Indicates the horizontal component of the loaded cable; M mid It represents the mid-span bending moment calculated according to the simply supported beam based on the external load; H represents the maximum height of the one-way beam-string determined according to the empirical span-to-height ratio; f(x) represents the belly height function; M(x) represents the bending moment function calculated according to the simply supported beam based on the external load.

10. A construction method of an assembled formwork frame for large-span construction, characterized in that: The steps include: Factory prefabrication: prefabricate the column assembly unit, beam assembly unit and adjustable support rod structure (4) in the factory according to the construction requirements, transport them to the site, and then mark the site to confirm the arrangement points of the columns (1); Single-layer column assembly: four column assembly units are assembled as a group on site, and a plurality of column vertical connecting pipes (12) are pre-fixed to the corresponding vertical hollow pipes for connection of each assembly unit through the column hollow pipe threaded holes (14) in combination with bolts, thereby assembling to form a plurality of single-layer columns; Column positioning and fixing: Place an assembled single-layer column at a confirmed point and fix it to the ground using a column bottom anchor (16); Assembling the upper and lower single-layer columns: hoist a single-layer column so that its vertical hollow tubes for connection are aligned one by one with the column vertical connecting tubes (12) of the previously placed single-layer columns to ensure that the two are accurately connected, and the column hollow tube threaded holes (14) on the vertical hollow tubes for connection are fixedly connected with the second threaded holes on the column vertical connecting tubes (12) by bolts, and then the two parallel rods are fixed by using a clamp (15); Complete assembly of columns: Repeat the assembly steps of upper and lower single-layer columns until the height of the column (1) reaches the design requirement; The crossbeam assembly is connected with the adjustable strut structure: the crossbeam assembly units are connected through the crossbeam connecting pipe (21) to form two complete crossbeams (2), and then the two crossbeams (2) are respectively connected with the adjustable strut structure (4) through the strut connecting pipe (41), and after completion, they are hoisted on the column; Support cable clamp connection: fix the steel cable (5) to the support cable clamp (3), and then fix the support cable clamp (3) to the junction of the column (1) and the crossbeam (2); after the support cable clamps (3) on both sides are arranged, connect the steel cable (5) to the adjustable support rod structure (4), and adjust the adjustable support rod structure (4) to apply prestress, thereby completing the assembly of the prefabricated formwork frame.

Images