A tie beam casting system for column-tie beam integrated construction

Abstract

The present invention relates to the field of integrated column-tie-beam construction, and discloses a tie-beam casting system for the integrated column-tie-beam construction, comprising a pier formwork mechanism, a tie-beam formwork mechanism and a tie-beam support mechanism. The pier formwork mechanism is a sliding formwork mechanism, and there are at least two pier formwork mechanisms. The tie-beam formwork mechanism and two adjacent pier formwork mechanisms are detachably connected. Each pier formwork mechanism comprises a support frame and a tie rod. The support frame is connected to a cast section of the pier, and an adjustment jack is provided on the support frame. The upper end of the tie rod is connected to the adjustment jack. The tie-beam support mechanism comprises a plurality of cantilever beams and distribution brackets. The plurality of cantilever beams are respectively arranged on both sides of the pier, and the two ends of the cantilever beams are respectively connected to the lower ends of the tie rods of two adjacent pier formwork mechanisms. The adjustment jack can drive the cantilever beams to move up and down, so as to achieve the goal of not removing the brackets and preventing the brackets from interfering with the cast tie beams.

Description

Technical Field

[0001] The invention relates to the field of column-tie-beam integrated construction, and in particular to a tie-beam casting system for column-tie-beam integrated construction. Background Art

[0002] During high pier slipform construction, multiple piers are typically installed along the width of the bridge under the same cap beam. Tie beams connect the piers, and the tie beam casting section, consisting of the piers and tie beams within the tie beam elevation range, is typically cast together. Before casting this tie beam section, support is required. If floor-mounted supports are used, the higher the piers, the greater the project workload, the higher the risk factor, and the more difficult it is to control construction costs. To this end, a common practice is to embed through-hole rods in the main piers, and then build supports on the through-hole rods to support the tie beam formwork.

[0003] After the tie beam is cast, during the process of removing the support, due to the lack of support points, the stress conditions of the support are constantly changing. The demolition workers may accidentally step on the loose position of the support, which may cause safety hazards. At the same time, in order to ensure safety, the demolition workers will reduce the demolition speed, which will affect the construction progress. Summary of the Invention

[0004] The present invention aims to provide a tie beam casting system for the integrated construction of columns and tie beams. The bracket is not removed and is raised together with the pier formwork. When the second tie beam is cast, the bracket is quickly re-erected. During the raising process, the bracket and the cast tie beam do not interfere with each other.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions: a tie beam casting system for integrated column and tie beam construction, comprising a pier formwork mechanism, a tie beam formwork mechanism, and a tie beam support mechanism. There are at least two pier formwork mechanisms, and the tie beam formwork mechanism is detachably connected to two adjacent pier formwork mechanisms. Each pier formwork mechanism includes a support frame and a tie rod. The support frame is connected to the cast section of the pier. An adjustment jack is provided on the support frame, and the upper end of the tie rod is connected to the adjustment jack.

[0006] The tie beam support mechanism includes several cantilever beams and distribution brackets. The several cantilever beams are respectively arranged on both sides of the piers. The two ends of the cantilever beams are respectively connected to the lower ends of the pull rods of the formwork mechanisms of the two adjacent piers. The adjusting jacks can drive the cantilever beams to move up and down; in the initial state, the distribution bracket is supported on the cantilever beam between the two adjacent piers, and the tie beam formwork mechanism is supported on the distribution bracket. The two sides of the distribution bracket are respectively a rotating side and a free side. The rotating side is rotatably connected to the cantilever beam on one side of the pier, and the free side is detachably connected to the cantilever beam on the other side; after the free side is disconnected from the cantilever beam on the other side, the adjusting jack drives the cantilever beam on that side to move downward, and the distribution bracket rotates to vertical under the action of gravity.

[0007] The implementation steps of this plan are:

[0008] 1. Pre-embed the support frame on the upper surface of the poured section of the pier below the tie beam casting section, install the adjusting jack on the support frame, connect the adjusting jack, pull rod, cantilever beam and distribution bracket in sequence, support the tie beam formwork mechanism on the distribution bracket, and cast the tie beam casting section.

[0009] 2. Remove the part of the tie beam formwork mechanism except the tie beam bottom formwork, drive the adjusting jack to move all the cantilever beams downward, thereby driving the distribution bracket to move downward. At this time, according to needs, you can choose to remove the remaining part of the tie beam formwork mechanism, that is, remove the tie beam bottom formwork.

[0010] 3. The cantilever beam close to the rotating side of the distribution bracket stops moving downward, and the cantilever beam close to the free side of the distribution bracket continues to move downward. The free side of the distribution bracket loses the support of the cantilever beam and then rotates around the rotating side to a vertical state. At this time, the distribution bracket is not at the bottom of the tie beam, but on the side of the tie beam. Therefore, when the pier formwork drives the distribution bracket to rise, it does not interfere with the cast tie beam.

[0011] The beneficial effects of this program are:

[0012] 1. The erection of the tie beam support mechanism is an aerial operation. In order to support the distribution bracket, it is necessary to support the distribution bracket by setting a cantilever beam. In order to ensure the supporting effect, the cantilever beam needs to be set below the distribution bracket. However, if it is set up like this, when the distribution bracket rotates, the cantilever beam will definitely hinder the rotation of the distribution bracket. In this solution, an adjusting jack is set to drive the cantilever beam to move up and down, so as to avoid the cantilever beam hindering the rotation of the distribution bracket.

[0013] 2. When the distribution bracket rotates, there is no need for manual operation standing next to the tie beam. The distribution bracket can be rotated by driving the adjustment jack under the action of gravity, which is convenient and fast and improves the safety of construction.

[0014] 3. There is no need to remove the bracket. After the distribution bracket is rotated, it is no longer at the bottom of the tie beam, but on the side of the tie beam. Therefore, when the pier formwork drives the distribution bracket to rise, it will not interfere with the cast tie beam.

[0015] Furthermore, the free side of the distribution bracket protrudes relative to the side of the corresponding cantilever beam, allowing it to connect to a steel cable. By driving an adjustment jack near the free side of the distribution bracket, the cantilever beam and the free side of the distribution bracket move downward, tilting the distribution bracket. This allows the steel cable to sequentially pass around the side of the tie beam near the rotational side, the underside of the tie beam, and finally connect to the free side of the distribution bracket. This arrangement, after the tie beam casting section is cast, is used in conjunction with the adjustment jack to reduce the rotation speed of the distribution bracket.

[0016] Specifically:

[0017] First, drive the adjusting jack on the free side of the distribution bracket to move the pull rod and the cantilever beam downward, and then drive the free side of the distribution bracket to rotate downward until the free side of the distribution bracket is flush with the side of the cantilever beam, that is, the free side of the distribution bracket no longer protrudes backward relative to the rear cantilever beam. At this time, the cantilever beam still supports the distribution bracket, and the distribution bracket is in an inclined state due to the rotation, that is, a gap is created between the distribution bracket and the bottom of the cast tie beam. At this time, prepare several steel cables, and the upper end of the steel cable is fixed on any structure above the cantilever beam. The worker stands on the side close to the rotating side of the distribution bracket, hangs the upper end of the steel cable on the installation platform, and places a part of the steel cable in the gap between the distribution bracket and the bottom of the cast tie beam. Use a rod-shaped object such as a steel bar to push the lower end of the steel cable from the free side of the distribution bracket to the rotating side of the distribution bracket. Then another worker catches the lower end of the steel cable on the free side of the distribution bracket and hooks the lower end of the steel cable to the free side of the distribution bracket.

[0018] If the steel cable is not passed from the rotating side of the distribution bracket to the free side, but is directly connected to the free side of the distribution bracket, then after the distribution bracket rotates, since the upper end of the steel cable and the distribution bracket are on both sides of the tie beam, and at the same time, the lower end of the steel cable is connected to the distribution bracket, when the pier formwork mechanism drives the tie beam support structure to rise, the steel cable will still interfere with the tie beam, thereby preventing the tie beam support structure from rising.

[0019] Then, continue to drive the adjustment jack on the free side of the distribution bracket to make the cantilever beam continue to move downward until the cantilever beam can no longer support the free side of the distribution bracket. At the same time, the worker pulls the steel cable and slowly lowers the free end of the distribution bracket to prevent the distribution bracket from being damaged due to excessive rotation speed.

[0020] Finally, the pier formwork mechanism drives the tie beam support mechanism to slide upward. During the entire upward sliding process of the pier formwork mechanism, the upper end of the steel cable is always fixed on any structure above the cantilever beam to facilitate reaching the second tie beam casting section. The steel cable is pulled to rotate the distribution bracket to a horizontal position. Otherwise, there is no other simple and safe way to rotate the distribution bracket to a horizontal position. At this time, the second tie beam has not yet been cast and formed. When the steel cable is pulled, neither the steel cable nor the distribution bracket will interfere with the tie beam.

[0021] Furthermore, the tie beam formwork mechanism includes a tie beam bottom formwork and two tie beam side formworks. The tie beam bottom formwork is horizontally bolted to the distribution bracket. The two tie beam side formworks are respectively arranged on both sides of the tie beam. A corner sealing formwork is provided between the two tie beam side formworks. The corner sealing formwork is filled between one end of the bottom of the tie beam and the pier. After the corner sealing formwork is removed, a strip gap is formed between the tie beam bottom formwork and the pier. The end of the steel cable is placed in the strip gap. When the steel cable passes through the lower side of the tie beam, the strip gap provides guidance for the steel cable. With this arrangement, after casting the tie beam section, the tie beam side formwork and corner sealing formwork are first removed. There is a gap between the tie beam bottom formwork and the pier column. The jack is adjusted to drive the cantilever beam downward, so that the distribution bracket is in an inclined state due to the rotation, and the rope head at the lower end of the steel cable falls into the gap between the tie beam bottom formwork and the pier column (because the end of the steel cable is a metal buckle, it usually has a certain weight), so that the position of the steel cable end can be observed during the pushing process to prevent the steel cable end from being lost. At the same time, the strip gap provides a guide for the steel cable, and then the lower end of the steel cable is smoothly pushed from the free side of the distribution bracket to the rotating side of the distribution bracket using a rod.

[0022] Furthermore, the support frame includes a crossbeam, a column, and a tie rod. The column is pre-embedded in the cast section of the pier column. The crossbeam and the upper end of the column are connected, and the end of the crossbeam extends outside the pier formwork mechanism. The adjustment jack is set at the end of the crossbeam. This configuration increases the load on the crossbeam due to the installation of the adjustment jack. In the process of the adjustment jack driving the cantilever beam to move up and down, the crossbeam shakes, and then bears the impulse generated by the cantilever beam and the distribution bracket. The load of the adjustment jack and the impulse generated by the cantilever beam and the distribution bracket are all vertical. Compared with the crossbeam directly pre-embedded in the cast section of the pier column, the pier column bears the bending moment transmitted by the crossbeam. In this solution, the load and impulse on the crossbeam are transferred to the column. The direction of the column, load, and impulse are all vertical. The pier column bears the axial force transmitted by the column and no longer bears bending moment, thereby making the pier column more capable of bearing.

[0023] Furthermore, each pier formwork mechanism also includes a side formwork unit and a lifting frame. The lifting frame includes two mutually perpendicular, horizontally arranged channel steel units, each connected to the side formwork unit at both ends. One of the channel steel units is provided with a support conversion unit. The support conversion unit includes two rectangular plates and a plurality of hanging rods. The upper ends of the hanging rods are connected to the channel steel units, and the lower ends of the hanging rods vertically pass through the two rectangular plates. The hanging rods are provided with nuts. When the nuts are tightened, the two rectangular plates can clamp the crossbeam from the upper and lower sides. In this arrangement, after the rectangular plates clamp the crossbeam, the rectangular plates provide vertical support for the crossbeam. However, during the upward sliding of the pier formwork mechanism, due to the rotation of the distribution bracket to one side of the crossbeam, the crossbeam closer to the distribution bracket bears a greater load, and the crossbeam tends to slide toward that side. If the crossbeam is fixedly connected to the support conversion unit, the tendency of the crossbeam to slide is prevented by the support conversion unit, and the connection between the crossbeam and the support conversion unit is more likely to deform. However, in this solution, after the rectangular plates clamp the crossbeam, they allow the crossbeam to move horizontally to a certain extent, thereby reducing the deformation of the crossbeam.

[0024] Furthermore, the distribution bracket includes two main beams, with several parallel secondary beams arranged between the two main beams, and the main beams are connected to the cantilever beams. This arrangement supports the main beams on the cantilever beams, and the two main beams are connected by the secondary beams, thereby increasing the support surface of the distribution bracket and the tie beam formwork, thereby increasing the stability of the structure.

[0025] Furthermore, a rotating assembly is provided between the cantilever beams corresponding to the rotating side of the distribution bracket. The rotating assembly includes a rotating shaft, a first lug plate, and a second lug plate. The first lug plate is provided on the distribution bracket, and the second lug plate is provided on the cantilever beam. The rotating shaft is rotatably connected to the first and second lug plates. This arrangement enables the distribution bracket to rotate relative to the cantilever beam.

[0026] Furthermore, a pull ring is provided on the free side of the distribution bracket, and the pull ring can be connected to the steel cable. In this way, the pull ring is provided to facilitate the connection between the pull ring and the steel cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A three-dimensional axonometric view of the pier formwork mechanism of the embodiment;

[0028] Figure 2 A three-dimensional axonometric drawing of the bridge pier formwork mechanism and the tie beam support mechanism in the tie beam casting section of the embodiment;

[0029] Figure 3 A three-dimensional axonometric view of the embodiment as a whole at the tie beam casting section;

[0030] Figure 4 A three-dimensional axonometric diagram of the tie beam support mechanism of the embodiment in the initial state;

[0031] Figure 5A three-dimensional axonometric diagram of the tie beam support mechanism of the embodiment after the distribution bracket is rotated to a vertical position;

[0032] Figure 6 A three-dimensional axonometric view of a position limiting member of an embodiment;

[0033] Figure 7 A three-dimensional axonometric drawing of the support frame and the lifting frame at the tie beam casting section of the embodiment;

[0034] Figure 8 A three-dimensional axonometric drawing of the pier formwork mechanism and the tie beam formwork mechanism in the tie beam casting section of the embodiment;

[0035] Figure 9 A three-dimensional axonometric view of a support conversion unit according to an embodiment;

[0036] Figure 10 This is a schematic diagram of the tie beam bottom formwork, bridge piers, steel cables, and rods for pushing the steel cables, viewed from above, when the distribution bracket is in an inclined state in step 4 of the embodiment;

[0037] Figure 11 This is a schematic diagram of a distribution bracket in an inclined state from a main perspective in the width direction of the bridge in step 4 of a specific implementation method of the embodiment. DETAILED DESCRIPTION

[0038] The following is further described in detail through specific implementation methods:

[0039] The reference numerals in the drawings of the specification include: pier side form 11, removable side form 111, non-removable side form 112, support frame 12, column 121, beam 122, tie rod 123, adjustment jack 124, lifting frame 13, first channel steel unit 131, second channel steel unit 132, platform connector 133, side form connector 134, side form tie rod 135, lifting jack 136, support rod 137, support conversion unit 14, hanging rod 141, rectangular plate 142 , nut 143, tie beam bottom formwork 21, tie beam side formwork 22, corner sealing formwork 23, limit plate 31, limit member 32, limit rod 321, limit part 322, cantilever beam 33, distribution bracket 34, pull ring 341, main beam 342, secondary beam 343, rotating assembly 35, rotating shaft 351, first ear plate 352, second ear plate 353, ear plate 36, cylinder 361, limit ring 37, pier 4, tie beam 5, steel cable 610, rod-shaped object 620, strip gap 630.

[0040] Example

[0041] The embodiment is basically as follows Figure 1-11 As shown: A tie beam casting system for column-tie beam integrated construction, including a pier formwork mechanism, a tie beam support mechanism and a tie beam formwork mechanism. Figure 1As shown, there are three pier template structures, such as Figure 2 As shown, there are two tie beam formwork mechanisms and two tie beam support mechanisms, each of which is detachably mounted between two adjacent pier formworks. This embodiment is suitable for square pier columns 4. The pier formwork mechanism is a sliding formwork mechanism. Both the pier formwork mechanism and the tie beam formwork mechanism are reinforced using conventional techniques such as back ribs and bolts. This embodiment is used in conjunction with conventional installation platforms to ensure that workers have a foothold.

[0042] a. Pier formwork structure

[0043] Each pier formwork mechanism includes a side form unit, a support frame 12 and a lifting frame 13. Figure 1 As shown, the side formwork unit includes four pier side forms 11 that can enclose the pier 4. The pier side formwork 11 between adjacent piers 4 is a detachable side formwork 111, and the other three pier side formworks 11 are non-detachable side formworks 112. The detachable side formwork 111 and the non-detachable side formwork 112 are detachably connected, with the vertical axis of the pier 4 as the center of the pier 4, and the side close to the center of the pier 4 as the inner side.

[0044] like Figure 7 As shown, the support frame 12 includes a crossbeam 122, two columns 121 and four tie rods 123. The columns 121 are all pre-buried on the upper surface of the cast section of the pier below the tie beam casting section, as shown in FIG. Figure 2 As shown, the upper ends of the columns 121 are higher than the highest point of the pier side form 11, and the crossbeams 122 are arranged horizontally along the length direction of the bridge ( Figure 2 anteroposterior direction), such as Figure 7 As shown, the crossbeam 122 is formed by welding two back-to-back and parallel channel steels, and the middle of the crossbeam 122 is bolted to the top of the column 121, as shown in FIG. Figure 2 As shown, both ends of the crossbeam 122 extend to the outside of the pier side form 11, and four tie rods 123 are vertically arranged in pairs at the front and rear sides of the pier column 4, as shown in FIG. Figure 7 As shown, two adjusting jacks 124 are respectively provided at both ends of the crossbeam 122. The adjusting jacks 124 are all through-type jacks. Each adjusting jack 124 is bolted to the crossbeam 122. The upper end of the pull rod 123 passes through the crossbeam 122 and the adjusting jack 124. The adjusting jack 124 can drive the pull rod 123 to rise or fall. For the convenience of display, all the jacks in this embodiment are only Figure 7 Displayed in.

[0045] like Figure 7As shown, the lifting frame 13 is arranged above the cast section of the pier 4, and includes a first channel steel unit 131 and a second channel steel unit 132 arranged horizontally perpendicular to each other. The first channel steel unit 131 is arranged along the width direction of the bridge. The first channel steel unit 131 and the second channel steel unit 132 each include two groups of connecting parts and two back-to-back and parallel channel steels. The two groups of connecting parts are respectively arranged on the channel steel in two opposite directions relative to the center of the pier 4. The two groups of connecting parts include a platform connecting part 133, a side form connecting part 134 and a lifting part from the outside to the inside. The platform connector 133 is clamped between the two channel steels and bolted to the two channel steels; the side form connector 134 is a rectangular rod, which is welded vertically and horizontally on the two channel steels. A vertical side form pull rod 135 is provided at each end of the side form connector 134. The lower end of the side form pull rod 135 passes through the side form connector 134 and is bolted to the upper surface of the side form; the lifting part includes a lifting jack 136 and a support rod 137. The lifting jack 136 is bolted to the two channel steels. The lifting jack 136 is also a through-type jack. The upper end of the support rod 137 is connected to the lifting jack 136, and the lower end of the support rod 137 is pre-buried in the cast section of the pier and increases section by section as the lifting frame 13 rises.

[0046] The first channel steel unit 131 is further provided with a support conversion unit 14, which is arranged inside the lifting member. Figure 9 As shown, the support conversion unit 14 includes two hanging rods 141 and three rectangular plates 142. The two hanging rods 141 are both inverted U-shaped rods that have been bent 90° twice. The two hanging rods 141 are hung on two channel steels at the same time. The hanging rods 141 are provided with threads and several nuts 143. The four ends of the two hanging rods 141 pass through the four corners of the rectangular plates 142 respectively. After tightening the nuts 143, the uppermost rectangular plate 142 and the hanging rod 141 can clamp the two channel steels, and the remaining two rectangular plates 142 clamp the crossbeam 122.

[0047] b. Tie beam support mechanism

[0048] like Figure 2 、 Figure 4 and Figure 5 As shown, the tie beam support mechanism includes four cantilever beams 33, a distribution bracket 34, a steel cable 610 and a limiter 32, as shown in FIG. Figure 2 As shown, the two ends of the cantilever beam 33 are respectively connected to the lower ends of the tie rods 123 on different piers 4 by threads. The cantilever beam 33 is an I-beam. Four cantilever beams 33 are respectively arranged horizontally on the front and rear sides of the pier 4 and are arranged along the width direction of the bridge ( Figure 2 left and right directions).

[0049] Figure 2 The details of the distribution bracket 34 are not shown. Figure 4 and Figure 5As shown, the distribution bracket 34 is set on the cantilever beam 33 between two adjacent piers 4, as shown in FIG. Figure 4 As shown, the distribution bracket 34 includes two parallel main beams 342, both of which are supported on the top of the cantilever beam 33. A number of parallel secondary beams 343 are welded between the two main beams 342. The rear main beam 342 is the rotating side of the distribution bracket 34, and a rotating assembly 35 is provided between the rear cantilever beam 33. The rotating assembly 35 includes a rotating shaft 351, a first ear plate 352 and a second ear plate 353. The first ear plate 352 is welded to the secondary beam 343, and the second ear plate 353 is welded to the On the cantilever beam 33, the rotating shaft 351 passes through the first ear plate 352 and the second ear plate 353 at the same time, and is rotatably connected to the first ear plate 352 and the second ear plate 353; the tie beam template mechanism is supported on the secondary beam 343, and the front main beam 342 is the free side of the distribution bracket 34, and is bolted to the front cantilever beam 33. The front main beam 342 protrudes forward relative to the front cantilever beam 33, and a pull ring 341 is welded on the front side of the front main beam 342, which can be connected to the steel cable 610.

[0050] like Figure 5 As shown, Figure 5 Zhongwei Figure 4 The locking device after the distribution bracket 34 is rotated, Figure 5 The cantilever beam 33 is Figure 4 The cantilever beam 33 at the middle and rear side has a horizontal ear plate 36 welded to its front side. The ear plate 36 is located on the left side of the main beam 342. A first limiting hole is provided on the ear plate 36. A cylinder 361 is integrally formed on the upper side of the ear plate 36. An internal thread is provided on the inner side of the cylinder 361. Figure 5 (not shown), the cylinder 361 is coaxial with the first limiting hole, the inner diameter of the cylinder 361 is larger than the diameter of the first limiting hole, and two limiting rings 37 and a limiting plate 31 are horizontally welded from top to bottom on the left side of the leftmost secondary beam 343 of the distribution bracket 34. The two limiting rings 37 are each provided with a second limiting hole running vertically therethrough, and a circular limiting groove is provided on the upper surface of the limiting plate 31. The first limiting hole, the second limiting hole and the limiting groove are coaxial and have the same diameter; as shown in FIG. Figure 5 and Figure 6 As shown, the limiting member 32 includes a limiting rod 321 and a limiting portion 322 integrally formed at the upper end of the limiting rod 321. The limiting portion 322 is cylindrical and has a diameter larger than the diameter of the limiting rod 321 and the first limiting hole. The side of the limiting portion 322 is provided with an external thread, and is engaged with the inner thread of the cylinder 361 of the ear plate 36. The limiting rod 321 passes through the cylinder 361, the first limiting hole and the second limiting hole in sequence, so that the lower end of the limiting rod 321 is inserted into and pressed against the limiting groove, and the limiting portion 322 and the cylinder 361 are threadedly connected.

[0051] Figure 5The ear plate 36, the limiting ring 37, the limiting groove and the limiting member 32 and other components can be arranged not only on the left side of the distribution bracket 34, but also on the right side of the distribution bracket 34 according to the situation.

[0052] c. Tie beam formwork mechanism

[0053] like Figure 3 As shown, the tie beam template mechanism includes a tie beam bottom template 21 and two tie beam side templates 22. The tie beam bottom template 21 is horizontally bolted to the distribution bracket 34, and the two tie beam side templates 22 are respectively arranged on both sides of the tie beam 5. Figure 8 As shown, a corner sealing template 23 is provided between the two tie beam side templates 22. The corner sealing template 23 is perpendicular to the tie beam side template 22 and the tie beam bottom template 21, and is located between the bottom of the tie beam 5 and the pier 4, that is, the upper end of the corner sealing template 23 is filled between one end of the tie beam bottom template 21 and the pier 4. The corner sealing template 23 is a rectangular template, and the lower ends of the two sides of the tie beam side template 22 extend downward near the pier 4 to facilitate bolt connection with the two ends of the corner sealing template 23; when the corner sealing template 23 is longer, it can be designed into two symmetrical parts, each part is connected to the tie beam side template 22, and then reinforced with the back rib in the prior art to facilitate disassembly.

[0054] d. A construction method for a tie beam casting system for integrated column and tie beam construction:

[0055] 1. Pre-embed the column 121 on the upper surface of the cast section of the pier below the tie beam casting section, drive the lifting jack 136, and the lifting jack 136 drives the lifting frame 13 to climb on the support rod 137, thereby driving the pier formwork mechanism to slide upward to the first tie beam casting section. At this time, the support conversion unit 14 is not involved in the system.

[0056] 2. Remove the detachable side form 111 and connect the columns 121, beams 122, tie rods 123, cantilever beams 33 and distribution brackets 34 in sequence.

[0057] 3. Support the tie beam bottom formwork 21 on the distribution bracket 34 , and connect the non-detachable side formwork 112 , the tie beam side formwork 22 , the corner sealing formwork 23 and the tie beam bottom formwork 21 .

[0058] 4. Pour the concrete of the tie beam pouring section. After the time required by the specification is reached, remove the tie beam side formwork 22 and the corner sealing formwork 23, remove the connecting bolts of the free side of the distribution bracket 34 and the cantilever beam 33, and drive the adjustment jack 124. Figure 4 As shown, the front pull rod 123 and the cantilever beam 33 are driven to move downward, thereby driving the tie beam bottom mold 21 to rotate downward along with the free side of the distribution bracket 34 until the free side of the distribution bracket 34 is flush with the front side of the cantilever beam 33, that is, the main beam 342 on the front side of the distribution bracket 34 no longer protrudes forward relative to the front cantilever beam 33, as shown in FIG. Figure 11As shown, the rotating assembly 35 is indicated by a circle, and the cross section of the tie beam 5 is indicated by a rectangle. At this time, the front cantilever beam 33 still supports the distribution bracket 34, and the distribution bracket 34 and the tie beam bottom form 21 are tilted due to the rotation, that is, a gap is generated between the tie beam bottom form 21 and the bottom of the cast tie beam 5, as shown in FIG. Figure 10 As shown, since the corner sealing formwork 23 has been removed, a strip-shaped gap 630 is formed between the tie beam bottom formwork 21 and the pier column 4.

[0059] At this time, prepare several steel cables 610, such as Figure 11 As shown, a worker stands on the side close to the rotating side of the distribution bracket 34, that is, the left side of the distribution bracket 34, and hangs the upper end of the steel cable 610 on the installation platform (not shown in the figure). The lower end of the steel cable 610 passes from the side of the tie beam 5 close to the rotating side (the left side of the tie beam), around the lower side of the tie beam 5 (that is, the gap between the distribution bracket 34 and the bottom of the cast tie beam 5), and finally connects with the pull ring (not shown in the figure) on the free side (the right end of the distribution bracket 34);

[0060] During this process, the bottom of the tie beam 5 is blocked by sunlight, and it is dark and unclear, and the position of the lower end of the steel cable 610 cannot be seen clearly. At the same time, there may be foreign objects blocking the steel cable 610, making it difficult to smoothly pass the steel cable 610 through the bottom of the tie beam 5; Figure 10 As shown, the end of the steel cable 610 is dropped into the gap between the tie beam bottom formwork 21 and the pier 4 (since the end of the steel cable 610 is a metal buckle, it usually has a certain weight) to facilitate observation of the position of the end of the steel cable 610, and a rod-shaped object 620 such as a steel bar is used to push the part of the steel cable 610 close to the end. Since the end of the steel cable 610 is placed in the strip gap 630, the strip gap 630 provides a guide for the steel cable, and the end of the steel cable 610 is pushed from the lower side of the tie beam bottom formwork 21 to the upper side of the tie beam bottom formwork 21. Then another worker catches the end of the steel cable 610 on the upper side of the tie beam bottom formwork 21 and hooks the end of the steel cable 610 on the pull ring 341 on the free side of the distribution bracket 34 (not shown in the figure).

[0061] 5. Drive the adjusting jack 124 to move the cantilever beam 33 further downward until the cantilever beam 33 can no longer support the free side of the distribution bracket 34. At the same time, the worker pulls the steel cable 610 and slowly lowers the free end of the distribution bracket 34 to prevent the distribution bracket 34 from being damaged due to excessive rotation speed.

[0062] 6. Pass the limiting rod 321 of the limiting member 32 through the cylinder 361, the first limiting hole and the second limiting hole in sequence, rotate the limiting portion 322 of the limiting member 32, so that the limiting portion 322 and the cylinder 361 are threadedly connected, and then the lower end of the limiting rod 321 is inserted into and pressed against the limiting groove.

[0063] 7. Connect the lifting frame 13 and the crossbeam 122 through the support conversion unit 14, remove the bolts between the column 121 and the crossbeam 122, drive the lifting jack 136, thereby driving the tie beam support mechanism (the part except the column 121) and the pier formwork mechanism to slide upward together. When lifting to the section to be poured for the next pier 4, bolt the detachable side form 111 and the non-detachable side form 112 together.

[0064] 8. Cast several sections of pier columns 4, slide the pier formwork mechanism to the second tie beam casting section, pull the steel cable 610 to return the distribution bracket 34 to the horizontal position, bolt the free side of the distribution bracket 34 to the cantilever beam 33, and repeat steps 3-7.

[0065] The above is only an embodiment of the present invention, and the common knowledge such as the specific technical solutions and / or characteristics in the solution are not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the description can be used to interpret the content of the claims.

Claims

1. A tie beam casting system for column-tie beam integrated construction, characterized by: It includes a pier formwork mechanism, a tie beam formwork mechanism, and a tie beam support mechanism. There are at least two pier formwork mechanisms. The tie beam formwork mechanism and two adjacent pier formwork mechanisms are detachably connected. Each pier formwork mechanism includes a support frame connected to the cast section of the pier. The support frame is provided with an adjustment jack. The support frame includes a crossbeam, a column, and a tie rod. The column is pre-embedded in the cast section of the pier column. The crossbeam is connected to the upper end of the column, and the end of the crossbeam extends outside the pier formwork mechanism. The adjustment jack is provided at the end of the crossbeam, and the upper end of the tie rod is connected to the adjustment jack. The tie beam support mechanism includes several cantilever beams and distribution brackets. The cantilever beams are respectively arranged on both sides of the bridge piers. The two ends of the cantilever beams are respectively connected to the lower ends of the tie rods of the template mechanisms of two adjacent bridge piers. The adjustable jacks can drive the cantilever beams to move up and down. In the initial state, the distribution bracket is supported on the cantilever beam between two adjacent bridge piers, and the tie beam template mechanism is supported on the distribution bracket. The two sides of the distribution bracket are respectively a rotating side and a free side. The rotating side is rotatably connected to the cantilever beam on one side of the bridge pier, and the free side is detachably connected to the cantilever beam on the other side. After the free side is disconnected from the cantilever beam on the other side, the adjustable jack drives the cantilever beam on that side to move downward, and the distribution bracket rotates to a vertical position under the action of gravity. Each pier formwork mechanism also includes a side formwork unit and a lifting frame. The lifting frame includes two horizontally arranged channel steel units that are perpendicular to each other. Both ends of the channel steel units are connected to the side formwork units. One of the channel steel units is provided with a support conversion unit. The support conversion unit includes two rectangular plates and several hanging rods. The upper ends of the hanging rods are connected to the channel steel units, and the lower ends of the hanging rods pass vertically through the two rectangular plates. Nuts are provided on the hanging rods. After tightening the nuts, the two rectangular plates can clamp the beams from the upper and lower sides.

2. A tie beam casting system for column-tie beam integrated construction according to claim 1, characterized in that: The free side of the distribution bracket protrudes relative to the corresponding cantilever beam side, and the free side of the distribution bracket can be connected to the steel cable. After driving the adjustment jack close to the free side of the distribution bracket, the cantilever beam and the free side of the distribution bracket move downward, and the distribution bracket is in an inclined state, so that the steel cable can successively pass around the side of the tie beam close to the rotating side, the lower side of the tie beam, and connect to the free side of the distribution bracket.

3. The tie beam casting system for column-tie beam integrated construction according to claim 2, characterized in that: The tie beam formwork mechanism includes a tie beam bottom formwork and two tie beam side formworks. The tie beam bottom formwork is horizontally bolted to the distribution bracket. The two tie beam side formworks are respectively arranged on both sides of the tie beam. A corner sealing formwork is provided between the two tie beam side formworks. The corner sealing formwork is filled between one end of the bottom of the tie beam and the pier column. After the corner sealing formwork is removed, a strip gap is formed between the tie beam bottom formwork and the pier column. The end of the steel cable is placed in the strip gap. When the steel cable passes through the lower side of the tie beam, the strip gap provides guidance for the steel cable.

4. The tie beam casting system for column-tie beam integrated construction according to claim 1, characterized in that: The distribution bracket includes two main beams, a number of parallel secondary beams are arranged between the two main beams, and the main beams are connected to the cantilever beams.

5. The tie beam casting system for column-tie beam integrated construction according to claim 4, characterized in that: A rotating assembly is provided between the cantilever beams corresponding to the rotating side of the distribution bracket. The rotating assembly includes a rotating shaft, a first ear plate and a second ear plate. The first ear plate is arranged on the distribution bracket, and the second ear plate is arranged on the cantilever beam. The rotating shaft is rotatably connected to the first ear plate and the second ear plate.

6. The tie beam casting system for column-tie beam integrated construction according to claim 5, characterized in that: A pull ring is provided on the free side of the distribution bracket, and the pull ring can be connected to the steel cable.

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