A large-volume concrete variable-angle special-shaped formwork and its construction method

Abstract

The present invention relates to a large-volume concrete variable-angle special-shaped formwork and a construction method thereof. The special-shaped formwork includes a main formwork, a main back rib, a tripod, a fine-tuning device, and a diagonal brace. The main back rib is arranged on the tripod through the fine-tuning device. The main formwork is arranged on the main back rib. The main formwork is provided with a pre-embedded positioning cone. The main formwork also includes a lap formwork that matches the pouring angle. The lap formwork is detachably arranged at the bottom of the main formwork. The two ends of the diagonal brace are rotatably connected to the main back rib and the tripod respectively through a first connecting member. The fine-tuning device includes a support, a screw rod, and a second connecting member. The support is fixed on the tripod. The bottom of the second connecting member is slidably arranged on the tripod. One end of the screw rod is threadedly connected to the support, and the other end of the screw rod is fixedly connected to the second connecting member. The bottom of the main back rib is rotatably connected to the top of the second connecting member. The advantages of the present invention are that it can realize the construction of large-volume concrete with variable angles, effectively ensure the concrete construction period and pouring quality, and reduce a large amount of equipment investment and labor costs.

Description

Technical Field

[0001] The invention relates to the technical field of large-volume concrete construction, and in particular to a large-volume concrete variable-angle special-shaped formwork and a construction method thereof. Background Art

[0002] Concrete special-shaped formwork is a temporary structure that ensures concrete components are formed to the designed shape and size. It is a pre-concrete pouring process. The quality of the formwork is closely related to the construction progress and the quality of the concrete, and is a prerequisite for ensuring concrete construction. Traditional large-volume concrete construction cannot meet the requirements of continuous pouring of 3m per bin when encountering corners. The formwork must be reinstalled at the corners for pouring, which consumes a lot of labor costs and leaves construction joints at the corners. This is inefficient and has unstable quality. During the formwork support process, it is easy to cause quality defects such as hanging curtains and honeycombs due to shifting, falling, and damage. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a large-volume concrete variable-angle special-shaped formwork, which can realize the construction of large-volume concrete with variable angles, effectively ensure the concrete construction period and pouring quality, and reduce a large amount of equipment investment and labor costs.

[0004] The object of the present invention is achieved through the following technical solutions: a large-volume concrete variable angle special-shaped formwork, comprising a main formwork, a main back rib, a tripod, a fine-tuning device and a diagonal brace, wherein the main back rib is arranged on the tripod through the fine-tuning device, the main formwork is arranged on the main back rib, the main formwork is provided with a pre-embedded positioning cone, and further comprising a lap formwork matching the casting angle, the lap formwork being detachably arranged at the bottom of the main formwork, and the lap formwork being an inner corner formwork or an outer corner formwork;

[0005] The diagonal brace includes a main brace and a first connecting piece which is retractably arranged at both ends of the main brace. The two ends of the diagonal brace are rotatably connected to the main back rib and the tripod respectively through the first connecting piece.

[0006] The fine-tuning device includes a support, a screw rod and a second connecting piece. The support is fixed on the tripod. The bottom of the second connecting piece is slidably arranged on the tripod. One end of the screw rod is threadedly connected to the support, and the other end of the screw rod is fixedly connected to the second connecting piece.

[0007] The second connecting member is the first connecting seat, the second connecting seat, or the third connecting seat, and the height of the connection point between the second connecting seat and the third connecting seat and the main back rib is greater than the height of the connection point between the first connecting seat and the main back rib;

[0008] The bottom of the main back rib is rotatably connected to the top of the second connecting piece;

[0009] During the pouring process, the lap formwork and the second connector are selected according to the specific pouring angle type, and then assembled into the corresponding special-shaped formwork according to the pouring angle type.

[0010] Furthermore, the first connecting member is a connecting screw, which is threadedly connected to the main support rod.

[0011] Furthermore, a connecting bolt is provided at the lower end of the main formwork, and a pull bar is provided at the upper end of the main formwork.

[0012] The present invention also provides a construction method for pouring large-volume concrete using the above-mentioned variable-angle special-shaped formwork, comprising the following steps:

[0013] In the previous bin where the corner elevation is reached, pour the material using the original formwork at a pouring height of no more than 2 cm. Before pouring, move the embedded positioning cone downward to the appropriate elevation.

[0014] When reaching the angle elevation, select and assemble the special-shaped formwork according to the type of casting angle;

[0015] Use the assembled special-shaped formwork to cast to the appropriate elevation above the corner. When pouring, make sure the overlapping formwork overlaps the poured concrete by 5cm.

[0016] Furthermore, when the casting angle is an external angle, the special-shaped formwork is assembled according to the overlap formwork as the external corner formwork and the second connecting piece as the second connecting seat. After assembly, the main formwork can reach a slope of 3:1 by adjusting the diagonal brace.

[0017] Furthermore, when the casting angle is an inner angle, the special-shaped formwork is assembled according to the overlap formwork as the inner angle formwork and the second connecting piece as the third connecting seat. After assembly, the main formwork can be made vertical by adjusting the diagonal brace.

[0018] Furthermore, when using special-shaped formwork for pouring, M36 connecting bolts are added to the lower end of the main formwork, and Φ16 tie rods are used to tighten the top of the main formwork.

[0019] Furthermore, the pouring speed during pouring is controlled within 0.5m / h.

[0020] The present invention has the following advantages: the present invention uses a large-volume concrete variable-angle special-shaped formwork composed of a main formwork, a main back rib, a tripod, a fine-adjustment device, a diagonal brace and a lap formwork. When performing large-volume concrete variable-angle casting construction, the fine-adjustment device and the lap formwork can be selected and assembled according to the specific casting angle type, so that the special-shaped formwork is suitable for the corresponding casting angle, reducing the repeated installation of the formwork, reducing concrete defects and special-shaped stratification during the casting process, facilitating the one-time forming of concrete, and thus greatly reducing the construction cost while ensuring the construction progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the special-shaped template in the present invention.

[0022] Figure 2 for Figure 1 A magnified view of the structure in the middle.

[0023] Figure 3 It is a structural schematic diagram of the fine-tuning device in the present invention.

[0024] Figure 4 It is a structural schematic diagram of the external corner template in the present invention.

[0025] Figure 5 It is a structural schematic diagram of the inner corner template in the present invention.

[0026] Figure 6 This is a schematic diagram of the formwork pouring process at the EL.795.000m~EL.805.100m bin of the present invention.

[0027] Figure 7 for Figure 6 Schematic diagram of formwork pouring in position a.

[0028] Figure 8 for Figure 6 Schematic diagram of formwork pouring in position B.

[0029] Figure 9 for Figure 6 Schematic diagram of formwork pouring in position C.

[0030] Figure 10 for Figure 6 Schematic diagram of formwork pouring in position d.

[0031] Figure 11 for Figure 8 Enlarged view of the structure at point B in the middle.

[0032] Figure 12 for Figure 10 Enlarged view of the structure at point C in the middle.

[0033] In the figure: 1. Main formwork; 2. Main back rib; 3. Tripod; 4. Fine-tuning device; 41. Support; 42. Screw; 43. Second connecting piece; 5. Diagonal brace; 6. Embedded positioning cone; 7. Overlap formwork; 8. Installation bolts; 9. Pull rod. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0035] like Figures 1 to 5As shown, a large-volume concrete special-shaped formwork with variable angles includes a main formwork 1, a main back rib 2, a tripod 3, a fine-tuning device 4 and a diagonal brace 5, wherein the main back rib 2 is arranged on the tripod 3 through the fine-tuning device 4, the main formwork 1 is arranged on the main back rib 2, and a pre-buried positioning cone 6 is provided on the main formwork 1. The main formwork 1, the main back rib 2 and the tripod 3 are all components of the existing casting formwork structure. The lower end of the main formwork 1 is provided with a connecting bolt 8, and the upper end of the main formwork 1 is provided with a pull bar 9. The large-volume concrete special-shaped formwork with variable angles also includes a lap formwork 7 that matches the casting angle. The lap formwork 7 is detachably connected to the bottom of the main formwork 1 by bolts. Specifically, the lap formwork 7 is Figure 5 The inner corner template shown or Figure 4 Exterior corner template shown.

[0036] The diagonal brace 5 comprises a main brace and first connectors that are retractably mounted at each end of the main brace. Specifically, the first connector is a connecting screw that is threadedly connected to the main brace. Turning the first connector allows the first connector to be extended or retracted, thereby varying the overall length of the diagonal brace 5. The first connectors pivotally connect the ends of the diagonal brace 5 to the main back rib 2 and the tripod 3, respectively. The pivotal connection can be achieved through a hinged or axial connection.

[0037] like Figure 3 As shown, the fine-tuning device 4 includes a support 41, a screw 42 and a second connecting member 43, wherein the support 41 is fixed to the tripod 3 by bolts, the bottom of the second connecting member 43 is slidably arranged on the tripod 3, one end of the screw 42 is threadedly connected to the support 41, and the other end of the screw 42 is fixedly connected to the second connecting member 43, and the bottom of the main back rib 2 is rotatably connected to the top of the second connecting member 43, and the rotational connection here can also be achieved by a hinge or an axis connection. Except that the second connecting member 43 can be changed, the rest of the structure of the fine-tuning device is the same as that of the existing fine-tuning device. Specifically, the second connecting member 43 is the first connecting seat, the second connecting seat or the third connecting seat, and the height of the connection point between the second connecting seat and the third connecting seat and the main back rib 2 is greater than the height of the connection point between the first connecting seat and the main back rib 2, wherein the first connecting seat is the structure in the existing fine-tuning device.

[0038] In the process of pouring large-volume concrete using the above-mentioned special-shaped formwork with variable angle, it is necessary to select the lap formwork 7 and the second connecting member 43 according to the specific pouring angle type, and then assemble the corresponding special-shaped formwork according to the pouring angle type to facilitate pouring. The main pouring process includes the following steps:

[0039] In the previous bin where the angle elevation is reached, the original formwork is used for pouring at a pouring height of no more than 2 cm. Before pouring, the embedded positioning cone 6 is moved down to the appropriate elevation. When the angle elevation is reached, the special-shaped formwork is selected and assembled according to the type of pouring angle. The assembled special-shaped formwork is used for pouring to the appropriate elevation above the angle. When pouring, the overlapping formwork 7 is overlapped with the poured concrete by 5 cm.

[0040] Figure 6 This is a schematic diagram of the pouring process of the EL.795.000m to EL.805.100m bin during the actual pouring process of the present invention, wherein a is the EL.795.000m to EL.796.00m bin, which is the previous bin to reach the angle elevation; b is the EL.796.000m to EL.799.021m bin, which is the outer angle bin, where the outer angle pouring is performed using a special-shaped template; c is the EL.799.021m to EL.801.915m bin, where pouring is performed according to the existing pouring method; d is the EL.801.915m to EL.805.100m bin, which is the inner angle bin, where the inner angle pouring is performed using a special-shaped template.

[0041] by Figure 7 The EL.795.000m~EL.796.00m positions shown and Figure 9 Taking the positions EL.799.021m to EL.801.915m as an example, both positions were cast using the existing formwork. The existing formwork structure comprises a main formwork 1, a main back rib 2, a tripod 3, a fine-tuning device 4, and diagonal braces 5. The diagonal braces 5 are adjusted to the same length as those in the existing casting formwork. The second connector 43 in the fine-tuning device 4 serves as the first connector. During casting at positions EL.795.000m to EL.796.00m, the embedded positioning cone 6 was lowered to an elevation of EL.795.600m, resulting in a casting height of 1m.

[0042] When the casting angle is an external angle, the special-shaped template is assembled according to the overlap template 7 as the external angle template and the second connecting member 43 as the second connecting seat. Figure 8 Taking the EL.796.000m~EL.799.021m warehouse shown in the figure as an example, the main template 1, the main back rib 2, the tripod 3 and the diagonal brace 5 structures remain unchanged, and the fine-tuning device 4 is reorganized. Since the height of the connection point between the second connecting seat and the main back rib 2 is greater than the height of the connection point between the first connecting seat and the main back rib 2, the connection point between the fine-tuning device 4 and the main back rib 2 is heightened. After assembly, the main template 1 can be adjusted by adjusting the diagonal brace 5 to reach Figure 11In the 3:1 slope state shown, the outer corner formwork is connected to the lower end of the main formwork 1 by bolts, and then the EL.796.000m elevation broken line is realized through the outer corner formwork, so that the corner formwork overlaps the poured concrete by 5cm, and then the special-shaped formwork is poured to the EL.799.021m elevation.

[0043] When the casting angle is an inner angle, the special-shaped template is assembled according to the overlap template 7 as the inner angle template, the first connecting member as the second connecting screw, and the second connecting member 43 as the third connecting seat. Figure 10 Taking the EL.801.915m to EL.805.100m position shown as an example, the structures of the main formwork 1, the main back rib 2 and the tripod 3 remain unchanged. Since the height of the connection point between the third connecting seat and the main back rib 2 is greater than the height of the connection point between the first connecting seat and the main back rib 2, the connection point between the fine-tuning device 4 and the main back rib 2 is heightened. The heightened height here is different from the heightened height when the casting angle is an external angle. By twisting the first connecting piece to shrink it, the overall length of the diagonal brace 5 is reduced, so that after assembly, the main formwork 1 can be adjusted by adjusting the diagonal brace 5 to reach Figure 12 In the vertical state shown, the outer corner formwork is connected to the lower end of the main formwork 1 by bolts, and then the EL.801.915m elevation broken line is realized through the outer corner formwork, so that the corner formwork overlaps the poured concrete by 5cm, and then poured to the EL.805.100m elevation through the special-shaped formwork.

[0044] When using special-shaped formwork for pouring, the installation of the special-shaped formwork requires adjusting the formwork joint gap and dislocation to meet the requirements of the specification. In order to ensure that the lower end of the main formwork 1 is tightly overlapped, M36 installation bolts 8 are added to the lower end of the main formwork 1, and Φ16 tie rods 9 are used to tighten the top of the main formwork 1. The pouring speed during pouring is controlled within 0.5m / h.

[0045] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A large-volume concrete variable-angle special-shaped formwork, comprising a main formwork (1), a main back rib (2), a tripod (3), a fine-tuning device (4) and a diagonal brace (5), wherein the main back rib (2) is arranged on the tripod (3) through the fine-tuning device (4), the main formwork (1) is arranged on the main back rib (2), and a pre-embedded positioning cone (6) is provided on the main formwork (1), characterized in that: It also includes a lap template (7) that matches the casting corner, the lap template (7) is detachably arranged at the bottom of the main template (1), and the lap template (7) is an inner corner template or an outer corner template; The diagonal brace (5) includes a main brace and a first connecting member that is telescopically arranged at both ends of the main brace. The two ends of the diagonal brace (5) are rotatably connected to the main back rib (2) and the tripod (3) respectively through the first connecting member. The fine-tuning device (4) includes a support (41), a screw rod (42) and a second connecting member (43). The support (41) is fixed on the tripod (3). The bottom of the second connecting member (43) is slidably arranged on the tripod (3). One end of the screw rod (42) is threadedly connected to the support (41), and the other end of the screw rod (42) is fixedly connected to the second connecting member (43). The second connecting member (43) is the first connecting seat, the second connecting seat, or the third connecting seat, and the height of the connection point between the second connecting seat, the third connecting seat and the main back rib (2) is greater than the height of the connection point between the first connecting seat and the main back rib (2); The bottom of the main back rib (2) is rotatably connected to the top of the second connecting member (43); During the pouring process, the lap template (7) and the second connecting member (43) are selected according to the specific pouring angle type, and then assembled into the corresponding special-shaped template according to the pouring angle type.

2. The large-volume concrete variable angle special-shaped formwork according to claim 1, characterized in that: The first connecting member is a connecting screw rod, which is threadedly connected to the main support rod.

3. The large-volume concrete variable angle special-shaped formwork according to claim 2, characterized in that: The lower end of the main template (1) is provided with a connecting bolt (8), and the upper end of the main template (1) is provided with a pull bar (9).

4. A construction method for a large-volume concrete variable angle special-shaped formwork as claimed in claim 3, characterized in that: The following steps are involved: In the previous chamber where the corner elevation is reached, the original formwork is used for pouring at a pouring height of no more than 2 cm, and the embedded positioning cone (6) is moved down to a suitable elevation before pouring; when the corner elevation is reached, the special-shaped formwork is selected and assembled according to the type of pouring corner; the assembled special-shaped formwork is used for pouring to a suitable elevation above the corner, and during pouring, the overlapping formwork (7) is overlapped with the poured concrete by 5 cm.

5. The construction method of large-volume concrete variable angle special-shaped formwork according to claim 4 is characterized in that: When the casting angle is an outer angle, the special-shaped template is assembled according to the overlap template (7) as the outer corner template and the second connecting member (43) as the second connecting seat. After assembly, the main template (1) can achieve a slope of 3:1 by adjusting the diagonal brace (5).

6. The construction method of large-volume concrete variable angle special-shaped formwork according to claim 4 is characterized in that: When the casting angle is an inner angle, the special-shaped template is assembled according to the overlap template (7) as the inner angle template and the second connecting member (43) as the third connecting seat. After assembly, the main template (1) can be made vertical by adjusting the diagonal brace (5).

7. The construction method of large-volume concrete variable angle special-shaped formwork according to claim 4, characterized in that: When pouring with a special-shaped formwork, an M36 connecting bolt (8) is added to the lower end of the main formwork (1), and a Φ16 tie rod (9) is used to tighten the top of the main formwork (1).

8. The construction method of large-volume concrete variable-angle special-shaped formwork according to claim 4 is characterized in that: The pouring speed during pouring is controlled within 0.5m / h.

Images