UHPC stand column formwork and reinforcement cage mounting structure and construction method thereof

Abstract

The invention provides a UHPC (Ultra High Performance Concrete) stand column formwork and reinforcement cage mounting structure and a construction method thereof, the UHPC stand column formwork and reinforcement cage mounting structure comprises a skeleton main body and a formwork main body sleeved outside the skeleton main body, and is characterized in that a plurality of counter bores are formed outside the formwork main body, and plug-in connecting assemblies connected with stirrups outside the skeleton main body are mounted in the counter bores; and the outer surface of the plug-in connecting assembly is flush with the outer surface of the mold shell main body, and the joint of the plug-in connecting assembly and the mold shell main body is sealed. The counter bores are formed in the outer portion of the formwork body, and the insertion type connecting assemblies are installed in the counter bores, so that convenient and reliable connection of the formwork body and the steel reinforcement framework body is achieved, the limitation that a traditional UHPC formwork needs face-by-face pouring and multiple times of splicing is broken through, integrated pouring forming of the formwork body is achieved, and the integrity and production efficiency of prefabricated parts are greatly improved; and meanwhile, the construction error-tolerant rate is remarkably increased, and the operation pressure of constructors is reduced.

Description

Technical Field

[0001] The present invention relates to the field of UHPC column-free formwork, and in particular to a UHPC column formwork and steel frame installation structure and a construction method thereof. Background Art

[0002] In current buildings, columns are typically constructed using a cast-in-place formwork process. This involves pre-embedding steel bars into the columns, then erecting the formwork. Concrete is then poured into the cavity created by the formwork. Existing formwork is commonly made of wood, steel, or aluminum. However, this construction method presents several challenges. Because all steps must be completed on-site, the process is complex, time-consuming, and formwork installation is difficult and time-consuming.

[0003] Patent document CN 118835751 A currently proposes a formed steel skeleton column with an integrated UHPC formwork and its construction method. By adding a formwork formed by pouring ultra-high performance concrete and wrapping the formwork around the edge of the steel skeleton, the formwork and steel skeleton can be prefabricated in a factory, eliminating the need for casting on the construction site. At the same time, the hollow cavity formed by the formwork can be directly poured with concrete, avoiding the difficulties of high-rise formwork and the time-consuming and labor-intensive process of removing the formwork.

[0004] However, there are still certain limitations in the actual application of this technology. Since the steel skeleton is usually composed of longitudinal bars, transverse bars and stirrups, the structure is relatively complex. Therefore, in order to achieve the above-mentioned covering connection method, it is necessary to press the multiple sides of the steel skeleton into the unsolidified ultra-high performance concrete one by one to form a connection between the two. As a result, the formwork cannot be cast as a whole in one go. It is necessary to cast the multiple sides of the formwork separately and piece them together after the initial solidification of each side. This not only increases the construction process, but may also affect the integrity and connection strength between the formworks. In addition, this process has high control requirements for the construction timing and low fault tolerance, which is not conducive to large-scale promotion and application. Therefore, a UHPC column formwork and steel skeleton installation structure and its construction method are proposed to solve the above problems. Summary of the Invention

[0005] The main purpose of the present invention is to provide a UHPC column formwork and steel frame installation structure and a construction method thereof, so as to solve the problem that the formwork cannot be integrally cast in one go during the connection process with the steel frame.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a UHPC column formwork and steel frame installation structure and a construction method thereof, including a skeleton body and a formwork body mounted on the outside thereof, which is characterized in that: a plurality of countersunk holes are provided on the outside of the formwork body, and plug-in connection components connected to the external stirrups of the skeleton body are installed in the countersunk holes. The plug-in connection components are embedded in the countersunk holes, and their outer surface is flush with the outer surface of the formwork body, and the connection is sealed.

[0007] In the preferred embodiment, the plug-in connection assembly includes a U-shaped insertion block, the outer side of the U-shaped insertion block is provided with a countersunk head that can be flush with the outer surface of the mold shell body, and one of the side arms of the U-shaped insertion block is provided with a rotating locking arm that can rotate unidirectionally inward, and a retractable interference seat is also provided in its groove. Before the interference seat is retracted, its front end is in conflict with the rotating locking arm and keeps the rotating locking arm in a horizontal state. The interference seat can retract after contacting the external stirrups of the skeleton body, and cooperate with the unidirectional rotation of the rotating locking arm to form a clamping structure for the external stirrups. A sealing portion is also provided on the inner side of the countersunk head.

[0008] In a preferred embodiment, the rotary lock arm includes a movable groove provided on a side arm of the U-shaped insert block, in which a lock arm body is rotatably provided via a rotating shaft. A torsion spring is mounted on the exterior of the rotating shaft for controlling the inward rotation of the lock arm body. A groove corresponding to the end of the rotating shaft is provided on one or both sides of the side arm. The end of the rotating shaft extends into the groove and is provided with a ratchet pawl assembly for limiting its inward unidirectional rotation. The ratchet and pawl assembly comprises a ratchet arranged at the end of a rotating shaft, a pawl matched with the ratchet is rotatably arranged in a groove, and a spring sheet matched with the pawl is also arranged on the side wall of the groove.

[0009] In the preferred embodiment, the interference seat includes a seat body slidably set in the U-shaped insertion block groove, and limit grooves are symmetrically arranged on the relative inner wall surfaces of the groove. A limit block is provided on the seat body and slides with the limit groove. A telescopic spring is also provided in the groove, and its end contacts the seat body.

[0010] In the preferred embodiment, the sealing part includes an outer rubber ring, the interior of the outer rubber ring is hollow, and an annular opening is provided on the inner side thereof. An easy-tear seal bag is built into the outer rubber ring and adapted to form an easy-tear seal bag. The easy-tear seal bag is provided with sealant, and the easy-tear opening of the easy-tear seal bag corresponds to the annular opening of the outer rubber ring.

[0011] The method includes: S1. Prefabricate the skeleton body and the formwork body, and during the prefabrication of the formwork body, reserve a plurality of countersunk holes corresponding to the external stirrups of the skeleton body; S2. Hoist the skeleton body to a preset position in the prefabricated formwork body, with its longitudinal reinforcement passing through both ends of the formwork body; S3. Install plug-in connection components in each countersunk hole to fix the prefabricated skeleton body and the formwork body; S4. Transport to the construction site, hoist the assembled skeleton body and formwork body, and use the longitudinal reinforcement passing through the bottom to complete the connection with the reserved longitudinal reinforcement on the reserved pile column.

[0012] In a preferred embodiment, a patching formwork for sealing the longitudinal reinforcement connection is further included, the patching formwork including a fixed formwork, a telescopic formwork being retractably inserted into the top of the fixed formwork, the telescopic formwork including an upper formwork of the same size as the fixed formwork, a lower formwork being provided on the inner side of the bottom of the upper formwork, the outer wall of the lower formwork being slidably fitted with the inner wall of the fixed formwork, a plurality of screws being pre-embedded in the top of the fixed formwork, a telescopic hole for inserting the screws being provided at the bottom of the upper formwork, and a support nut for supporting the telescopic formwork being provided on the outer thread of the screws; The top of the telescopic formwork, the bottom of the fixed formwork, and the top and bottom of the formwork body are respectively provided with an occlusal recess and an occlusal protrusion, and the top of the reserved pile is provided with an occlusal recess.

[0013] In a preferred embodiment, in step S4, before hoisting the frame body and the formwork body, the patching formwork is installed on the reserved pile column through the interlocking recess and interlocking protrusion, and sealant is applied at the connection between the two. Then, after the longitudinal reinforcement of the frame body is connected to the reserved longitudinal reinforcement, the telescopic formwork is lifted until it is connected to the formwork body, and sealant is applied at the connection between the interlocking recess and interlocking protrusion. Then, the support nut is rotated to the corresponding support height. The method further includes: S5, pouring concrete in the formwork body until the concrete is solidified and formed.

[0014] In the preferred embodiment, it further comprises a hoisting part and a positioning support mechanism for hoisting the skeleton body and the formwork body; The hoisting part includes a first hoop that can be installed on the outside of the formwork body, the outside of the hoop is provided with corresponding lifting ears, and the outside of the hoop is provided with support plates distributed in a cross shape; The positioning support mechanism includes a reference base mounted on the outside of the reserved pile column and four guide support assemblies, the reference base includes a second hoop, a cross-shaped docking seat is provided on the outside of the second hoop, a conical docking groove is provided in the docking seat, and docking plates are provided on both sides of the docking end, the guide support assembly includes a base, a conical docking block is provided at the end of the base, the front end of the conical docking groove is adapted to the conical docking groove, and fixing plates corresponding to the docking plates are provided on both sides of the conical docking block, and the fixing plates and the docking plates can be fixed by bolts, and the top of the base is hingedly provided with a guide support rod and an angle adjustment telescopic cylinder, the telescopic end of the angle adjustment telescopic cylinder is hinged to the guide support rod, the top of the guide support rod is provided with an end telescopic rod, the telescopic end of the end telescopic rod is provided with a guide wheel, and the outside of the guide wheel is rotatably provided with a support seat located behind its wheel body, and the support seat can be fixed to the support plate by bolts.

[0015] In the preferred embodiment, the specific method for hoisting the skeleton body and the formwork body in step S4 is: Install the hoisting part on the outside above the formwork body, install the reference base on the outside of the reserved pile, and install the four guide support components on the four docking seats of the reference base respectively; Then, by adjusting the angle of the telescopic cylinder and the telescopic rod at the end, adjust the distance between the guide wheels at the ends of the four guide support rods to match the external dimensions of the formwork body, and rotate the support base to a vertical direction; The hoisting equipment uses the lifting lugs on the hoisting part to lift it, and lower it from the four guide wheels until the docking seat contacts the support plate, and then connects the two with bolts; Complete the connection between longitudinal reinforcements.

[0016] The present invention provides a UHPC column formwork and steel frame installation structure and a construction method thereof. By arranging countersunk holes on the outside of the formwork body and installing plug-in connection components in the countersunk holes, a convenient and reliable connection between the formwork body and the steel frame body is achieved, breaking through the limitations of traditional UHPC formwork that requires surface casting and multiple splicing, and realizing integrated casting and molding of the formwork body, greatly improving the integrity and production efficiency of prefabricated components, while significantly improving the construction fault tolerance and reducing the operating pressure of construction personnel. Secondly, the plug-in connection component adopts an embedded installation method, and its outer surface remains flush with the outer surface of the formwork body, which not only ensures the flatness and aesthetics of the formwork exterior, but also effectively reduces the risk of collision caused by raised structures during transportation and hoisting. A sealing structure is provided at the connection to ensure that no leakage, water seepage and other problems occur during subsequent concrete pouring, thereby improving the construction quality and structural density. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and examples: Figure 1 This is a structural diagram of the formwork body and the countersunk hole of the present invention; Figure 2 This is a structural diagram of the connection between the formwork body and the skeleton body of the present invention; Figure 3 This invention Figure 2 Half-section structure diagram; Figure 4 This is a structural diagram of the connection between the plug-in connection assembly and the skeleton body of the present invention; Figure 5 This is a structural diagram of the plug-in connection assembly of the present invention in its initial state; Figure 6 This invention Figure 5 Half-section structure diagram; Figure 7 This invention Figure 5 A magnified view of the structure in the middle; Figure 8 This is a half-section structural diagram of the sealing portion of the present invention; Figure 9 This is a schematic diagram of the connection of the plug-in connection assembly of the present invention; Figure 10 This is a structural diagram of the hoisting of the formwork body and the skeleton body of the present invention; Figure 11 This is a diagram of the support structure of the positioning support mechanism of the present invention; Figure 12 It is a structural diagram of the hoisting part of the present invention; Figure 13 It is a structural diagram of the reference base of the present invention; Figure 14 This is a structural diagram of the guide support assembly of the present invention; Figure 15 This is a structural diagram of the connection between the guide wheel and the support base of the present invention; Figure 16 This is a structural diagram of the seam-filling formwork of the present invention; Figure 17 This invention Figure 16 Half-section structure diagram; Figure 18 This is a diagram of the joint filling formwork connection structure of the present invention; In the figure: formwork body 1; skeleton body 2; countersunk hole 3; plug-in connection assembly 4; U-shaped insert block 40; countersunk head 41; rotating locking arm 42; movable groove 420; locking arm body 421; rotating shaft 422; torsion spring 423; groove 424; pawl 425; pawl 426; spring leaf 427; abutment seat 43; seat body 430; limiting groove 431; limiting block 432; telescopic spring 433; sealing part 44; outer rubber ring 440; easy-tear seal bag 441; reserved pile column 5; reserved longitudinal reinforcement 6; lifting part 7; clamp 701; lifting ear 702; support plate 70 3; positioning support mechanism 8; reference base 80; second clamp 801; docking seat 802; conical docking groove 803; docking plate 804; guide support assembly 81; base 810; conical docking block 811; fixed plate 812; guide support rod 813; angle adjustment telescopic cylinder 814; end telescopic rod 815; guide wheel 816; support seat 817; seam repairing mold shell 9; fixed mold shell 90; screw rod 91; telescopic mold shell 92; lower mold shell 920; upper mold shell 921; telescopic hole 93; support nut 94; occlusal protrusion 95; occlusal recess 96. DETAILED DESCRIPTION

[0018] Example 1 like Figure 1-9As shown, a UHPC column formwork and steel frame installation structure includes a frame body 2 and a formwork body 1 mounted on the outside thereof, wherein the frame body 2 is composed of longitudinal reinforcement, transverse reinforcement and stirrups. The specific shapes of the frame body 2 and the formwork body 1 can be rectangular or cylindrical. A plurality of countersunk holes 3 are provided on the outside of the formwork body 1, and plug-in connection components 4 connected to the external stirrups of the frame body 2 are installed in the countersunk holes 3. The plug-in connection components 4 are embedded in the countersunk holes 3, and their outer surface is flush with the outer surface of the formwork body 1, and the connection is sealed.

[0019] With such a design, multiple plug-in connection components 4 can be used to complete the connection between the formwork body 1 and the skeleton body 2, so that the formwork body 1 can be cast and formed in the corresponding mold at one time, while reducing the urgency of connecting the formwork body 1 and the skeleton body 2. The installation between each other can be completed at any time before the overall lifting, which greatly improves the fault tolerance and effectively reduces the pressure on construction workers. In addition, the embedded design of the plug-in connection component 4 can maintain the flatness of the exterior, and the sealing design of the connection can ensure the sealing for the subsequent internal concrete pouring. In addition, through the concrete pouring after on-site installation, the formwork body 1 and the skeleton body 2 are completely integrated. The combination of the skeleton body 2 and the formwork body 1 can further reduce the on-site construction steps. At the same time, the skeleton body 2 can be used to provide support to the formwork body 1 internally to prevent it from deformation and cracking.

[0020] It should be noted that the specific number of countersunk holes 3 is determined according to the supporting force required for the weight of the skeleton body 2, and their specific positions need to correspond to the external stirrups of the skeleton body 2, so that the plug-in connection components 4 can achieve the effect of fixing each other through connection with the stirrups.

[0021] In a preferred embodiment, the plug-in connection assembly 4 includes a U-shaped insert block 40, such as Figure 3 As shown, its shape is convenient for insertion into the outside of the stirrups, and a countersunk head 41 is provided on the outside of the U-shaped insertion block 40, which can be flush with the outer surface of the mold shell body 1, so that it can be embedded in the countersunk hole 3, keeping the outer surface flush while limiting the insertion distance of the plug-in connection component 4, and at the same time playing a sealing role. A rotating locking arm 42 that can rotate unidirectionally inward is provided on one of the side arms of the U-shaped insertion block 40. In this embodiment, the rotating locking arm 42 is provided on the upper side arm of the U-shaped insertion block 40, and a retractable interference seat 43 is also provided in its groove. Before the interference seat 43 is retracted, its front end conflicts with the rotating locking arm 42 and keeps the rotating locking arm 42 in a horizontal state. The interference seat 43 can retract after contacting the external stirrups of the skeleton body 2, and cooperate with the unidirectional rotation of the rotating locking arm 42 to form a clamping structure for the external stirrups. A sealing portion 44 is also provided on the inner side of the countersunk head 41.

[0022] Such a design facilitates the smooth insertion of the insertion end of the plug-in connection component 4 into the mold shell body 1, and during the insertion process, when the interference seat 43 expands and contracts due to interference with the stirrups, it contacts the horizontal restriction of the rotating lock arm 42, thereby causing the rotating lock arm 42 to rotate inward, and through cooperation with the interference seat 43, the effect of clamping the stirrups is achieved, thereby fixing the skeleton body 2.

[0023] Among them, the rotating locking arm 42 includes a movable groove 420 arranged on the side arm of the U-shaped insertion block 40, and a locking arm body 421 is rotatably arranged in the movable groove 420 through a rotating shaft 422, and a torsion spring 423 for controlling the inward rotation of the locking arm body 421 is sheathed on the outside of the rotating shaft 422. It should be noted that the installation method of the torsion spring 423 is an existing technology, so it will not be described in detail here.

[0024] With such a design, the locking arm body 421 can realize inward self-rotation under the action of the torsion spring 423 after losing the interference of the interference seat 43 .

[0025] In addition, one side or both sides of the side arm are provided with a groove 424 corresponding to the end of the rotating shaft 422. The end of the rotating shaft 422 extends into the groove 424 and is provided with a ratchet pawl assembly for limiting its inward unidirectional rotation, thereby preventing the locking arm body 421 from reversing outward, resulting in the inability to fix the horizontal movement of the skeleton body 2. In addition, the design of the groove 424 avoids the ratchet pawl assembly from exceeding the size of the countersunk hole 3.

[0026] The ratchet pawl assembly includes a ratchet 425 arranged at the end of the rotating shaft 422, and a pawl 426 that cooperates with the ratchet 425 is rotatably arranged in the groove 424. A spring sheet 427 that cooperates with the pawl 426 is also provided on the side wall of the groove 424. Under the action of the spring sheet 427, the pawl 426 maintains cooperation with the ratchet 425, thereby realizing the one-way limiting function.

[0027] Furthermore, the interference seat 43 includes a seat body 430 slidably set in the groove of the U-shaped insertion block 40, and a limiting groove 431 is symmetrically arranged on the relative inner wall surfaces of the groove. A limiting block 432 is provided on the seat body 430 and slides with the limiting groove 431. The limiting block 432 and the limiting groove 431 achieve the effect of limiting their linear movement distance. A telescopic spring 433 is also provided in the groove, and the end of the telescopic spring 433 is in conflict with the seat body 430. The telescopic spring 433 can enable the seat body 430 to maintain a conflicting relationship with the locking arm main body 421 when it is not in conflict with the stirrups.

[0028] It should be noted that both the seat body 430 and the locking arm body 421 are provided with arc grooves adapted to the stirrups.

[0029] In the preferred embodiment, the sealing portion 44 includes an outer rubber ring 440, the interior of the outer rubber ring 440 is hollow, and an annular opening is provided on its inner side. An easy-tear seal bag 441 is built into the outer rubber ring 440 to form a matching shape therewith, and a sealant is provided in the easy-tear seal bag 441, and the easy-tear opening of the easy-tear seal bag 441 corresponds to the annular opening of the outer rubber ring 440.

[0030] With such a design, when the plug-in connection component 4 is inserted, the easy-tear opening of the easy-tear seal bag 441 can be broken by the extrusion between the countersunk head 41 and the countersunk hole 3, so that the sealant inside it flows out, forming a seal at the connection. At the same time, the plug-in connection component 4 is bonded, and the outer rubber ring 440 can form a secondary seal on its outer ring, wherein the sealant can be AB glue.

[0031] To sum up, through the plug-in connection component 4 in this embodiment, during installation, the skeleton body 2 can be fixed only by inward insertion, which is convenient to install and highly efficient. In addition, the sealing of the installation point can be ensured without affecting the external flatness. Secondly, the enclosing clamping structure formed by the U-shaped insertion block 40, the seat body 430 and the locking arm body 421 of the plug-in connection component 4 achieves all-round fixation of the skeleton body 2.

[0032] Example 2 Further illustrate with reference to Example 1, Figure 10-18 The structure shown is a construction method for a UHPC column formwork and steel frame installation structure, the method comprising: S1, prefabricate the skeleton body 2 and the formwork body 1, and during the prefabrication process of the formwork body 1, reserve a plurality of countersunk holes 3 corresponding to the external stirrups of the skeleton body 2, and the countersunk holes 3 can be formed by setting a corresponding mold shape in the mold.

[0033] S2. The skeleton body 2 is hoisted to a preset position in the prefabricated formwork body 1. The longitudinal reinforcements are passed through both ends of the formwork body 1. The passed longitudinal reinforcements facilitate the connection of the upper and lower ends with other structures.

[0034] S3. Install the plug-in connection assembly 4 in each countersunk hole 3 to fix the prefabricated skeleton body 2 and the formwork body 1.

[0035] S4. Transport to the construction site, hoist the assembled skeleton body 2 and the formwork body 1, and use the longitudinal reinforcement passing through the bottom to complete the connection with the reserved longitudinal reinforcement 6 on the reserved pile column 5. The reserved longitudinal reinforcement 6 and the reserved pile column 5 can be connected by welding or straight thread sleeve.

[0036] Through the above method, the on-site installation of the skeleton body 2 and the formwork body 1 is completed.

[0037] The preferred embodiment also includes a patching formwork 9 for sealing the longitudinal reinforcement joints, thereby forming an integral formwork structure without the need to install other formworks, while improving the overall durability.

[0038] The patching formwork 9 includes a fixed formwork 90, and the top of the fixed formwork 90 is telescopically plugged with a telescopic formwork 92. Both the fixed formwork 90 and the telescopic formwork 92 are cast with UHPC concrete. The telescopic formwork 92 includes an upper formwork 921 of the same size as the fixed formwork 90. ​​A lower formwork 920 is provided on the inner side of the bottom of the upper formwork 921. The outer wall of the lower formwork 920 is slidably fitted with the inner wall of the fixed formwork 90, so that the use length of the telescopic formwork 92 can be adjusted by the extension and contraction of the telescopic formwork 92. A plurality of screws 91 are pre-embedded in the top of the fixed formwork 90, and a telescopic hole 93 for inserting the screw 91 is provided at the bottom of the upper formwork 921. The external thread of the screw 91 is provided with a support nut 94 for supporting the telescopic formwork 92.

[0039] With such a design, the use height of the patching formwork 9 can be adjusted by lifting the telescopic formwork 92, and the support nut 94 can be adjusted to a corresponding height by rotating to support the telescopic formwork 92, thereby fixing the use height.

[0040] The top of the telescopic formwork 92, the bottom of the fixed formwork 90, and the top and bottom of the formwork body 1 are respectively provided with a bite recess 96 and a bite protrusion 95, and the top of the reserved pile 5 is provided with a bite recess 96. The tight connection at the connection is achieved by the cooperation of the bite recess 96 and the bite protrusion 95 at the upper and lower connections.

[0041] Furthermore, in step S4, before hoisting the skeleton body 2 and the formwork body 1, the patching formwork 9 is installed on the reserved pile 5 through the bite recess 96 and the bite protrusion 95, and sealant is set at the connection between the two. Then, after the longitudinal reinforcement of the skeleton body 2 is connected with the reserved longitudinal reinforcement 6, the telescopic formwork 92 is lifted to be connected with the formwork body 1, and sealant is set at the connection between the bite recess 96 and the bite protrusion 95. Then, the support nut 94 is rotated to the corresponding support height. The sealant can be AB glue to bond the connection and seal it at the same time.

[0042] The method further includes: S5, pouring concrete in the formwork body 1 until the concrete is solidified and formed.

[0043] This design forms an effective UHPC integral formwork structure, improves overall durability, and eliminates the need to install additional formwork.

[0044] In the preferred embodiment, it also includes a hoisting portion 7 and a positioning support mechanism 8 for hoisting the skeleton body 2 and the formwork body 1.

[0045] The lifting part 7 includes a first clamp 701 that can be installed on the outside of the formwork body 1. The outside of the clamp 701 is provided with a corresponding lifting ear 702. The outside of the clamp 701 is provided with a support plate 703 distributed in a cross shape, so as to facilitate the lifting of the skeleton body 2 and the formwork body 1 through the lifting ear 702.

[0046] The positioning support mechanism 8 includes a reference base 80 sleeved on the outside of the reserved pile 5 and four guide support components 81.

[0047] The reference base 80 includes a second clamp 801, and a cross-shaped docking seat 802 is provided on the outside of the second clamp 801. Figure 13 As shown, the second clamp 801 is an asymmetric clamp structure, thereby providing a position for the setting of the docking seat 802. A conical docking groove 803 is provided in the docking seat 802, and docking plates 804 are provided on both sides of the docking end.

[0048] The guide support assembly 81 includes a base 810, and the end of the base 810 is provided with a conical docking block 811 whose front end is adapted to the conical docking groove 803. Fixed plates 812 corresponding to the docking plate 804 are respectively provided on both sides of the conical docking block 811. The fixed plate 812 and the docking plate 804 can be fixed by bolts. The cooperation between the conical docking block 811 and the conical docking groove 803 can achieve precise docking between the two. At the same time, the support reference positioning of the guide support assembly 81 can be achieved through the precise docking between the guide support assembly 81 and the reference base 80.

[0049] The top of the base 810 is hingedly provided with a guide support rod 813 and an angle adjustment telescopic cylinder 814. The telescopic end of the angle adjustment telescopic cylinder 814 is hinged to the guide support rod 813, so that the angle of the guide support rod 813 can be adjusted by adjusting the telescopic cylinder 814. The top of the guide support rod 813 is provided with an end telescopic rod 815, and the telescopic end of the end telescopic rod 815 is provided with a guide wheel 816. The outside of the guide wheel 816 is rotatably provided with a support seat 817 located behind its wheel body. The design located behind the wheel body facilitates its contact with the mold shell body 1. The support seat 817 can be fixed to the support plate 703 by bolts. With this design, the specific positions of the guide wheel 816 and the support seat 817 can be adjusted by the telescopic end telescopic rod 815, thereby achieving precise adjustment.

[0050] It should be noted that the installation of the reference base 80 and the guide support assembly 81 needs to ensure the horizontality of their support surfaces.

[0051] In this embodiment, the end telescopic rod 815 and the angle adjustment telescopic cylinder 814 are both hydraulic cylinders.

[0052] With such a design, the four guide wheels 816 can be used to contact the formwork body 1 from four directions to achieve its guiding and limiting function during lifting. After the descent is completed, the support effect is achieved through the interference between the support seat 817 and the support plate 703, so that the guiding function can be achieved during lifting and it can be supported after it is in place.

[0053] In the preferred embodiment, the specific method for hoisting the skeleton body 2 and the formwork body 1 in step S4 is: Install the hoisting part 7 on the outside above the formwork body 1, and install the reference base 80 on the outside of the reserved pile 5, and install the four guide support assemblies 81 on the four docking seats 802 of the reference base 80 respectively; Then, by adjusting the angle of the telescopic cylinder 814 and the telescopic rod 815, the distance between the guide wheels 816 at the ends of the four guide support rods 813 is adjusted to match the external dimensions of the formwork body 1, and the support base 817 is rotated to a vertical direction; The lifting device uses the lifting lugs 702 on the lifting part 7 to lift it, and lowers it through the four guide wheels 816 until the docking seat 802 and the support plate 703 come into contact, and then the two are connected by bolts; Complete the connection between longitudinal reinforcements.

[0054] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. In other words, equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A UHPC column formwork and steel frame installation structure, comprising a frame body (2) and a formwork body (1) mounted on the outside thereof, characterized in that: A plurality of countersunk holes (3) are provided on the outside of the formwork body (1), and plug-in connection components (4) connected to the external stirrups of the skeleton body (2) are installed in the countersunk holes (3). The plug-in connection components (4) are embedded in the countersunk holes (3), and their outer surfaces are flush with the outer surface of the formwork body (1), and the connection is sealed.

2. The UHPC column formwork and steel frame installation structure according to claim 1 is characterized by: The plug-in connection assembly (4) includes a U-shaped insertion block (40), the outer side of the U-shaped insertion block (40) is provided with a countersunk head (41) that can be flush with the outer surface of the mold shell body (1), one of the side arms of the U-shaped insertion block (40) is provided with a rotating lock arm (42) that can rotate inward in one direction, and a retractable abutment seat (43) is also provided in its groove. Before the abutment seat (43) is not retracted, its front end abuts against the rotating lock arm (42) and keeps the rotating lock arm (42) in a horizontal state. The abutment seat (43) can retract after contacting the external stirrups of the skeleton body (2) and cooperate with the unidirectional rotation of the rotating lock arm (42) to form a clamping structure for the external stirrups. A sealing portion (44) is also provided on the inner side of the countersunk head (41).

3. The UHPC column formwork and steel frame installation structure according to claim 2 is characterized by: The rotating locking arm (42) comprises a movable groove (420) provided on a side arm of the U-shaped insertion block (40); a locking arm body (421) is rotatably provided in the movable groove (420) via a rotating shaft (422); a torsion spring (423) is sleeved on the outside of the rotating shaft (422) for controlling the locking arm body (421) to rotate inward; a groove (424) corresponding to an end of the rotating shaft (422) is provided on one side or both sides of the side arm; the end of the rotating shaft (422) extends into the groove (424) and is provided with a ratchet pawl assembly for limiting its inward unidirectional rotation; The ratchet pawl assembly comprises a ratchet (425) arranged at the end of the rotating shaft (422), a pawl (426) rotatably arranged in the groove (424) and matched with the ratchet (425), and a spring sheet (427) matched with the pawl (426) is further arranged on the side wall of the groove (424).

4. The UHPC column formwork and steel frame installation structure according to claim 3 is characterized by: The abutting seat (43) comprises a seat body (430) slidably arranged in the groove of the U-shaped insertion block (40), limiting grooves (431) are symmetrically arranged on the opposite inner wall surfaces of the groove, a limiting block (432) is provided on the seat body (430) and is slidably matched with the limiting groove (431), and a telescopic spring (433) is also provided in the groove, the end of which is in abutment with the seat body (430).

5. The UHPC column formwork and steel frame installation structure according to claim 4 is characterized in that: The sealing portion (44) includes an outer rubber ring (440), the interior of the outer rubber ring (440) is hollow, and an annular opening is provided on the inner side thereof. An easy-tear seal bag (441) adapted to the outer rubber ring (440) is built into the outer rubber ring (440), and a sealant is provided in the easy-tear seal bag (441), and the easy-tear opening of the easy-tear seal bag (441) corresponds to the annular opening of the outer rubber ring (440).

6. The construction method of the UHPC column formwork and steel frame installation structure according to any one of claims 1 to 5, characterized in that: The method includes: S1, prefabricating the skeleton body (2) and the formwork body (1), and during the prefabrication process of the formwork body (1), reserving a plurality of countersunk holes (3) corresponding to the external stirrups of the skeleton body (2); S2, hoisting the skeleton body (2) to a preset position in the prefabricated formwork body (1), with its longitudinal reinforcement passing through both ends of the formwork body (1); S3, installing the plug-in connection components (4) in each countersunk hole (3) to fix the prefabricated skeleton body (2) and the formwork body (1); S4. Transport to the construction site, hoist the assembled skeleton body (2) and formwork body (1), and use the longitudinal reinforcement passing through the bottom to complete the connection with the reserved longitudinal reinforcement (6) on the reserved pile column (5).

7. The construction method of the UHPC column formwork and steel frame installation structure according to claim 6 is characterized by: The invention also includes a patching mold shell (9) for sealing the longitudinal reinforcement connection, wherein the patching mold shell (9) includes a fixed mold shell (90), a telescopic mold shell (92) is retractably inserted on the top of the fixed mold shell (90), and the telescopic mold shell (92) includes an upper mold shell (921) of the same size as the fixed mold shell (90), a lower mold shell (920) is provided on the inner side of the bottom of the upper mold shell (921), and the outer wall of the lower mold shell (920) is slidably fitted with the inner wall of the fixed mold shell (90), a plurality of screw rods (91) are pre-embedded on the top of the fixed mold shell (90), and a telescopic hole (93) for inserting the screw rods (91) is provided on the bottom of the upper mold shell (921), and a support nut (94) for supporting the telescopic mold shell (92) is provided on the external thread of the screw rod (91); The top of the telescopic formwork (92), the bottom of the fixed formwork (90), and the top and bottom of the formwork body (1) are respectively provided with an occlusal recess (96) and an occlusal protrusion (95), and the top of the reserved pile (5) is provided with an occlusal recess (96).

8. The construction method of the UHPC column formwork and steel frame installation structure according to claim 7 is characterized by: In step S4, before hoisting the skeleton body (2) and the formwork body (1), the patching formwork (9) is installed on the reserved pile column (5) through the bite recess (96) and the bite protrusion (95), and a sealant is provided at the connection between the two. Then, after the longitudinal reinforcement of the skeleton body (2) is connected to the reserved longitudinal reinforcement (6), the telescopic formwork (92) is lifted to be connected to the formwork body (1), and a sealant is provided at the connection between the bite recess (96) and the bite protrusion (95), and then the support nut (94) is rotated to the corresponding support height. The method further comprises: S5, pouring concrete in the formwork body (1) until the concrete solidifies and takes shape.

9. The construction method of the UHPC column formwork and steel frame installation structure according to claim 6 is characterized by: It also includes a hoisting portion (7) and a positioning support mechanism (8) for hoisting the skeleton body (2) and the formwork body (1); The hoisting portion (7) comprises a first hoop (701) which can be mounted on the outside of the formwork body (1); a corresponding lifting lug (702) is provided on the outside of the hoop (701); and support plates (703) distributed in a cross shape are provided on the outside of the hoop (701); The positioning support mechanism (8) comprises a reference base (80) sleeved on the outside of the reserved pile column (5) and four guide support assemblies (81), the reference base (80) comprises a second hoop (801), the outside of the second hoop (801) is provided with a cross-shaped docking seat (802), the docking seat (802) is provided with a conical docking groove (803), and both sides of the docking end are provided with docking plates (804), the guide support assembly (81) comprises a base (810), the end of the base (810) is provided with a conical docking block (811) whose front end is adapted to the conical docking groove (803), and both sides of the conical docking block (811) are provided with docking plates (804) respectively. 04) corresponding fixing plate (812), the fixing plate (812) and the docking plate (804) can be fixed by bolts, the top of the base (810) is hingedly provided with a guide support rod (813) and an angle adjustment telescopic cylinder (814), the telescopic end of the angle adjustment telescopic cylinder (814) is hingedly connected to the guide support rod (813), the top of the guide support rod (813) is provided with an end telescopic rod (815), the telescopic end of the end telescopic rod (815) is provided with a guide wheel (816), the outside of the guide wheel (816) is rotatably provided with a support seat (817) located behind its wheel body, and the support seat (817) can be fixed to the support plate (703) by bolts.

10. The construction method of the UHPC column formwork and steel frame installation structure according to claim 9 is characterized in that: The specific hoisting method of the skeleton body (2) and the formwork body (1) described in step S4 is: Install the hoisting part (7) on the outside above the formwork body (1), install the reference base (80) on the outside of the reserved pile (5), and install the four guide support components (81) on the four docking seats (802) of the reference base (80) respectively; Then, by adjusting the angle of the telescopic cylinder (814) and the telescopic rod (815), the spacing between the guide wheels (816) at the ends of the four guide support rods (813) is adjusted to match the external dimensions of the mold body (1), and the support base (817) is rotated to a vertical direction; The hoisting device uses the lifting lugs (702) on the hoisting portion (7) to lift it, and lowers it from the four guide wheels (816) until the docking seat (802) and the support plate (703) come into contact, and then connects the two with bolts; Complete the connection between longitudinal reinforcements.

Images