Mounting method of repair-free stress self-balancing prefabricated part and temporary bearing frame

Abstract

The invention provides a repair-free stress self-balancing prefabricated part mounting method and a temporary bearing frame, and the mounting method comprises the following steps: placing a prefabricated part on a lifting appliance, and lifting the prefabricated part to a mounting position by using the lifting appliance; pre-embedded steel bars of the prefabricated parts are connected with pre-embedded steel bars of the completed main body structure; a distribution beam is installed on the lifting appliance, the distribution beam is located between the prefabricated part and the completed main body structure, a formwork is installed on the distribution beam, a hanging piece is installed on the lifting appliance, and a lifting structure of the lifting appliance is dismantled, so that the lifting appliance is hung on the prefabricated part through the hanging piece; reinforcing steel bars are bound in the formwork, and concrete is poured; and the formwork, the distributive girder, the lifting appliance and the hanging piece are dismantled. According to the prefabricated part, the end inclined ribs are used for supporting, the prefabricated part and a main body structure are cooperatively stressed, a self-balancing stress system is formed, the temporary supporting frame can be used as a lifting appliance, a cast-in-place joint support and a component supporting support, the structure is shared, and the prefabricated part is simple, convenient and fast to use and has good universality. The prefabricated part is not provided with other embedded parts except for the embedded steel bars at the joint positions.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated component installation, and in particular to a method for installing a repair-free, force-bearing, self-balancing prefabricated component and a temporary support frame. Background Art

[0002] In bridge and wharf structures, to reduce construction time in adverse on-site environments and speed up construction progress, many concrete components are prefabricated. The installation process involves a large number of temporary structures such as embedded lifting rings, hoists, temporary component support brackets, and cast-in-place joint brackets. In traditional construction techniques, different application scenarios require the installation of support brackets, cast-in-place joint brackets, and lifting equipment, and different temporary structures are not universal. In complex geological or hydrological environments such as water, rock, and deep silt geology, ground-based temporary support brackets have disadvantages such as high construction difficulty, high construction risk, and long construction periods, making construction quality difficult to ensure. In order to facilitate the lifting of prefabricated components, lifting rings or other embedded parts need to be reserved, which are difficult to repair later and affect the appearance quality of the structure. For current bridge and wharf components, there are problems with the universality and repair of support and temporary structures during lifting installation and cast-in-place joint construction, as well as limitations on the use environment. A repair-free, self-balancing prefabricated component installation method and temporary support bracket are needed. Summary of the Invention

[0003] The present invention addresses the shortcomings of the prior art by providing a method for installing self-balancing prefabricated components that require no repairs and a temporary support frame. The prefabricated components utilize diagonal reinforcement at their ends, which coordinates with the main structure to form a self-balancing force system. This allows the temporary support frame to serve as a hanger, a cast-in-place joint support, and a component support. This shared, simple, and convenient structure offers excellent versatility. Aside from embedded steel bars at the joints, the prefabricated components have no embedded parts, such as lifting rings, eliminating the need for repairs and ensuring concrete quality and appearance.

[0004] In order to solve the above technical problems, the present invention provides a method for installing a repair-free, self-balancing prefabricated component. The method comprises: Place the prefabricated components on the sling and use the sling to lift the prefabricated components to the installation location; Connect the embedded steel bars of the prefabricated components with the embedded steel bars of the completed main structure; Install the distribution beam on the spreader, the distribution beam is located between the prefabricated component and the completed main structure, install the template on the distribution beam, install the hanger on the spreader, remove the lifting structure of the spreader, and hang the spreader on the prefabricated component through the hanger; Tie steel bars and pour concrete inside the formwork; Remove formwork, distribution beams, slings and hangers.

[0005] In some embodiments, before placing the prefabricated components on the sling, multiple L-shaped limit blocks are placed on the sling. After the prefabricated components are placed on the sling, one side of the L-shaped limit block is fixed and pressed on the sling by the prefabricated components, and the other side of the L-shaped limit block is in contact with the side of the prefabricated components.

[0006] In some embodiments, the embedded steel bars of the prefabricated component and the embedded steel bars of the completed main structure are respectively the first pre-bent steel bars and the second pre-bent steel bars. The first pre-bent steel bars and the second pre-bent steel bars both include a horizontal section and a bending section. The angle between the horizontal section and the bending section is an obtuse angle. The horizontal sections of the first pre-bent steel bars and the second pre-bent steel bars are respectively embedded in the prefabricated component bars and the completed main structure. After the prefabricated component is hoisted to the installation position, the horizontal section of the first pre-bent steel bar is lower than the horizontal section of the second pre-bent steel bar, and the bending sections of the first pre-bent steel bar and the second pre-bent steel bar are coaxially arranged.

[0007] In some embodiments, a method for connecting embedded steel bars of a prefabricated component to embedded steel bars of a completed main structure includes: Sleeves are provided on the embedded steel bars of the prefabricated components and the embedded steel bars of the completed main structure. The sleeves are used to fix the two ends of the diagonal bars to the embedded steel bars of the prefabricated components and the embedded steel bars of the completed main structure respectively, and the diagonal bars are used to achieve self-balancing of the force of the prefabricated components.

[0008] In some embodiments, after the lifting structure of the sling is removed, the length of the diagonal reinforcement is adjusted using a connecting sleeve so that the forces on the multiple diagonal reinforcements are similar.

[0009] In some embodiments, a method of installing a hanger on a sling includes: A plurality of lower supporting beams are installed at the bottom of the spreader, and a plurality of upper supporting beams are placed on the top of the prefabricated component. The upper supporting beams and the lower supporting beams are connected by a suspension rod so that the spreader is hung on the prefabricated component through a hanger.

[0010] In some embodiments, a pre-compression test is performed within the formwork before reinforcing steel is tied and concrete is poured within the formwork.

[0011] On the other hand, the present invention provides a temporary support frame for implementing the above-mentioned method of installing repair-free load-bearing self-balancing prefabricated components, including a hanger and a hanger, wherein the hanger is provided with a lifting lug and a pad beam, the pad beam is used to support the prefabricated component, and the hanger is used to hang the hanger on the prefabricated component, so that the hanger can serve as a support for the cast-in-place joint between the prefabricated component and the completed main structure.

[0012] In some embodiments, the sling includes two main beams, both of which are provided with lifting ears, and the cushion beam is placed on the two main beams.

[0013] In some embodiments, an L-shaped limit block is provided on the cushion beam, and the L-shaped limit block is used to limit the prefabricated component.

[0014] In some embodiments, the hanger includes a lower supporting beam and an upper supporting beam, and the lower supporting beam and the upper supporting beam are connected by a suspension rod, and adjustment nuts are provided at both ends of the suspension rod.

[0015] The beneficial effects of the present invention are: 1. The precast components of this invention utilize diagonal reinforcement at their ends, which synergizes with the main structure to form a self-balancing force system. This allows the temporary support frame to serve as a hanger, cast-in-place joint support, and component support. This shared structure is simple and convenient, offering excellent versatility. Aside from embedded rebar at the joints, the precast components have no embedded parts such as lifting rings, eliminating the need for repairs and ensuring concrete quality and appearance.

[0016] 2. The present invention realizes the limitation of the prefabricated components by placing multiple L-shaped limit blocks on the spreader, and can use the weight of the prefabricated components to fix the L-shaped limit blocks without adopting any other form of fixation.

[0017] 3. The present invention utilizes pre-buried first pre-bent steel bars and second pre-bent steel bars to connect the prefabricated component and the completed main structure. The bending of the first pre-bent steel bars and the second pre-bent steel bars enables the prefabricated component to be subjected to symmetrical upward lifting forces from the two completed main structures, thereby achieving self-balancing force on the prefabricated component.

[0018] 4. The present invention uses sleeves to connect the diagonal bars to the first pre-bent steel bars and the second pre-bent steel bars respectively. The sleeves and the diagonal bars are threaded together, which makes it easy to adjust the length of the diagonal bars so that the force on each diagonal bar is balanced.

[0019] 5. The present invention utilizes hangers to hang the slings on prefabricated components, so that the slings become brackets for the cast-in-place joints between the prefabricated components and the completed main structure, thus achieving structural sharing. The hangers are simple and convenient to install and have good versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the prefabricated component of the present invention when it is hoisted to the installation position; Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle; Figure 3 For the present invention Figure 1 A top view of Figure 4 This is a schematic diagram of the structure when pouring concrete at the joint of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point B in the middle; Figure 6 For the present invention Figure 4 Top view of .

[0021] Reference numerals: prefabricated component 1; first pre-bent steel bar 11; completed main structure 2; second pre-bent steel bar 21; hanger 3; main beam 31; lifting lug 32; cushion beam 33; L-shaped limit block 34; hanger 4; lower supporting beam 41; upper supporting beam 42; hanging rod 43; pad 44; distribution beam 5; formwork 6; wire rope 7; diagonal reinforcement 8; DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0023] like Figure 1 As shown, the present invention provides a method for installing a repair-free, self-balancing prefabricated component, comprising: S1, such as Figure 1 As shown, the prefabricated component 1 is placed on the hoist 3, and the hoist 3 is used to hoist the prefabricated component 1 to the installation position. Embedded steel bars are set at both ends of the prefabricated component 1. The two ends of the prefabricated component 1 correspond to the two completed main structures 2, and embedded steel bars are also set on the two completed main structures 2. Among them, such as Figure 2 、 3 As shown, the sling 3 includes two main beams 31, on which lifting lugs 32 are welded. Two cushion beams 33 are placed on the two main beams 31 to support the prefabricated component 1. The cushion beams 33 can be formed by welding two I-beams. Step S1 specifically includes: Place the two main beams 31 on the horizontal ground. The distance between the two main beams 31 should be greater than the width of the prefabricated component 1. Place the cushion beam 33 on the two main beams 31, and hang the prefabricated component 1 on the cushion beam 33. The cushion beam 33 can be fixed on the main beam 31 under the action of the gravity of the prefabricated component 1; Use the lifting equipment and supporting wire rope 7 and shackle to lift the prefabricated component 1 to the installation position, that is, the lifting device Figure 1 Position shown.

[0024] In some embodiments, in order to prevent the prefabricated component 1 from shifting, before the prefabricated component 1 is placed on the spreader 3, a plurality of L-shaped limit blocks 34 are placed on the cushion beam 33. Figure 2The figure shows the situation when four L-shaped limit blocks 34 are arranged. After the prefabricated component 1 is placed on the sling 3, the prefabricated component 1 is fixed on the sling 3 by the weight of the prefabricated component 1, and the other side of the L-shaped limit block 34 is in contact with the side of the prefabricated component 1.

[0025] The main crossbeam 31, cushion beam 33, and L-shaped stopper 34 of the sling 3 of the present invention do not require welding or other means of fastening. Their stability can be ensured by simply utilizing the automatic movement of the prefabricated component 1. This makes the sling 3 of the present invention more flexible for prefabricated components 1 of different sizes. Of course, the cushion beam 33 and the main crossbeam 31, and the L-shaped stopper 34 and the cushion beam 33, can be connected by bolts or welding.

[0026] S2, such as Figure 4 As shown, the embedded steel bars of the prefabricated component 1 are connected to the embedded steel bars of the completed main structure 2; Specifically, the embedded steel bars of the prefabricated component 1 and the embedded steel bars of the completed main structure 2 are the first pre-bent steel bars 11 and the second pre-bent steel bars 21 respectively. The first pre-bent steel bars 11 and the second pre-bent steel bars 21 both include horizontal sections and bending sections. The angle between the horizontal section and the bending section is an obtuse angle. The horizontal sections of the first pre-bent steel bars 11 and the second pre-bent steel bars 21 are respectively embedded in the prefabricated component 1 and the completed main structure 2. After the prefabricated component 1 is hoisted to the installation position, the horizontal section of the first pre-bent steel bar 11 is lower than the horizontal section of the second pre-bent steel bar 21, and the bending sections of the first pre-bent steel bar 11 and the second pre-bent steel bar 21 are coaxially arranged.

[0027] In some embodiments, the embedded steel bars of the prefabricated component 1 are connected to the embedded steel bars of the completed main structure 2 in the following manner: Sleeves are provided on the embedded steel bars of the prefabricated component 1 and the prefabricated main structure 2. The sleeves are used to securely connect the ends of the diagonal bars 8 to the embedded steel bars of the prefabricated component 1 and the embedded steel bars of the completed main structure 2, respectively. The diagonal bars 8 achieve self-balancing force on the prefabricated component 1. The sleeves are connected to the embedded steel bars and the diagonal bars 8 by threads.

[0028] It can be understood that after the first pre-bent steel bar 11 and the second pre-bent steel bar 21 are connected by the diagonal reinforcement 8, the prefabricated component 1 can be fixedly connected to the completed main structure 2 by the diagonal reinforcement 8 without the need to continue to use the hanger 3 for support. Moreover, the hanger 3 can in turn use the fixed prefabricated component 1, so that the hanger 3 serves as a support for the cast-in-place joint between the prefabricated component 1 and the completed main structure 2 for cast-in-place.

[0029] In addition, since the oblique reinforcement 8 and the embedded steel bars of the present invention are connected by sleeves, the length of the oblique reinforcement 8 can be adjusted by the sleeves, so that the forces on the multiple oblique reinforcements 8 are balanced.

[0030] S3, such as Figure 4 As shown, a distribution beam 5 is installed on the hanger 3. The distribution beam 5 can be made of channel steel. The distribution beam 5 can be fixed to the main crossbeam 31 by bolts. The distribution beam 5 is located between the prefabricated component 1 and the completed main structure 2. A formwork 6 is installed on the distribution beam 5. The formwork 6 can be made of square wood or bamboo plywood, or a steel formwork 6. A hanger 4 is installed on the hanger 3. The hanging structure of the hanger 3 is removed so that the hanger 3 is hung on the prefabricated component 1 through the hanger 4. At this time, the hanger 3, the distribution beam 5, the formwork 6 and other components (such as railings, walkways and other ancillary facilities) are all supported by the prefabricated component 1. In some embodiments, the method of installing the hanger 4 on the sling 3 includes: like Figure 5 、 6 As shown, multiple lower supporting beams 41 are installed at the bottom of the sling 3, and the lower supporting beams 41 can be fixed to the main crossbeam 31 of the sling 3 by bolts. Multiple upper supporting beams 42 are placed on the top of the prefabricated component 1, and the upper supporting beams 42 and the lower supporting beams 41 are connected by a hanger 43, so that the sling 3 is hung on the prefabricated component 1 through the hanger 4. The upper supporting beams 42 and the lower supporting beams 41 are both composed of two I-beams. The two ends of the hanger 43 pass through the upper supporting beam 42 and the lower supporting beam 41 and are provided with a pad 44 and an adjusting nut. The upper supporting beam 42 can be fastened to the prefabricated component 1 by rotating the adjusting nut. At this time, the wire rope 7 and the shackle are removed, and the sling 3 is hung on the prefabricated component 1 through the hanger 4.

[0031] In addition, the upper supporting beam 42 and the lower supporting beam 41 may also be made of channel steel or other steel structures with holes, and the suspension rod 43 passes through the holes.

[0032] After removing the lifting structure (steel wire rope 7 and shackle) of the sling 3, the length of the diagonal reinforcement 8 is adjusted using the connecting sleeve so that the multiple diagonal reinforcements 8 are subjected to similar forces.

[0033] S4, tying steel bars and pouring concrete in the formwork 6; In some embodiments, before tying the steel bars and pouring concrete in the formwork 6, a pre-compression test is performed in the formwork 6. The pre-compression test can use concrete blocks, sandbags or steel bars. The pre-compression load is 1.05 to 1.10 times the load that the formwork 6 can withstand. The pre-compression test can eliminate the inelastic deformation of the formwork 6, test the safety of the formwork 6, measure the elastic deformation of the formwork 6, and provide a basis for the preset arch of the formwork 6.

[0034] S5. Remove the formwork 6, distribution beam 5, sling 3 and hanger 4.

[0035] The present invention utilizes the sling 3 and the hanger 4, eliminating the need to install any structure other than embedded steel bars on the prefabricated component 1. After completion, the prefabricated component 1 does not need to undergo exterior repair. Furthermore, the sling 3 and the hanger 4 are simple and quick to manufacture, install, and construct. They can all be made into standard components (such as the main crossbeam 31, the cushion beam 33, the L-shaped limit block 34, the lower support beam 41, the upper support beam 42, the hanger 43, etc.). A single standard component is lightweight and convenient for transportation and hoisting in complex environments. The assembly level is high. Furthermore, the diagonal reinforcement 8 is connected to the main structure for self-balancing force, and the length of the diagonal reinforcement 8 can be adjusted within a certain range according to actual needs. The sling 8 is not restricted by the topographical, geological, or hydrological environment, and adverse construction conditions can be avoided. The present invention has the advantages of strong applicability, energy conservation and environmental protection, effective cost savings, accelerated installation and disassembly progress, and convenient later turnover.

[0036] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A method for installing a repair-free, self-balancing prefabricated component, characterized in that: include: Placing the prefabricated component (1) on the sling (3), and using the sling (3) to lift the prefabricated component (1) to the installation position; Connecting the embedded steel bars of the prefabricated component (1) with the embedded steel bars of the completed main structure (2); Installing a distribution beam (5) on the sling (3), the distribution beam (5) being located between the prefabricated component (1) and the completed main structure (2), installing a template (6) on the distribution beam (5), installing a hanger (4) on the sling (3), and removing the hoisting structure of the sling (3) so that the sling (3) is hung on the prefabricated component (1) through the hanger (4); Tie the steel bars and pour the concrete in the formwork (6); Remove the formwork (6), distribution beam (5), sling (3) and hanger (4).

2. The method for installing a repair-free, self-balancing prefabricated component according to claim 1, characterized in that: Before placing the prefabricated component (1) on the sling (3), a plurality of L-shaped limit blocks (34) are placed on the sling (3); after the prefabricated component (1) is placed on the sling (3), one side of the L-shaped limit block (34) is fixedly pressed on the sling (3) by the prefabricated component (1), and the other side of the L-shaped limit block (34) is in contact with the side surface of the prefabricated component (1).

3. The method for installing a repair-free, self-balancing prefabricated component according to claim 1, characterized in that: The embedded steel bars of the prefabricated component (1) and the embedded steel bars of the completed main structure (2) are respectively a first pre-bent steel bar (11) and a second pre-bent steel bar (21); the first pre-bent steel bar (11) and the second pre-bent steel bar (21) both include a horizontal section and a bent section; the angle between the horizontal section and the bent section is an obtuse angle; the horizontal sections of the first pre-bent steel bar (11) and the second pre-bent steel bar (21) are respectively embedded in the prefabricated component (1) and the completed main structure (2); after the prefabricated component (1) is hoisted to the installation position, the horizontal section of the first pre-bent steel bar (11) is lower than the horizontal section of the second pre-bent steel bar (21); and the bent sections of the first pre-bent steel bar (11) and the second pre-bent steel bar (21) are coaxially arranged.

4. The method for installing a repair-free, self-balancing prefabricated component according to claim 3, characterized in that: The method for connecting the embedded steel bars of the prefabricated component (1) with the embedded steel bars of the completed main structure (2) comprises: Casings are provided on the embedded steel bars of the prefabricated component (1) and the embedded steel bars of the completed main structure (2). The two ends of the diagonal reinforcement (8) are fixedly connected to the embedded steel bars of the prefabricated component (1) and the embedded steel bars of the completed main structure (2) by using the casings, and the force self-balancing of the prefabricated component (1) is achieved by using the diagonal reinforcement (8).

5. The method for installing a repair-free, self-balancing prefabricated component according to claim 4, characterized in that: After the lifting structure of the sling (3) is removed, the length of the diagonal reinforcement (8) is adjusted using the connecting sleeve so that the forces on the multiple diagonal reinforcements (8) are similar.

6. The method for installing a repair-free, self-balancing prefabricated component according to any one of claims 1 to 5, characterized in that: The method for installing the hanger (4) on the sling (3) comprises: A plurality of lower supporting beams (41) are installed at the bottom of the sling (3), a plurality of upper supporting beams (42) are placed on the top of the prefabricated component (1), and the upper supporting beams (42) and the lower supporting beams (41) are connected via a sling (43), so that the sling (3) is hung on the prefabricated component (1) via a hanger (4).

7. A temporary support frame for implementing the method for installing a repair-free, self-balancing prefabricated component according to any one of claims 1 to 6, characterized in that: The invention comprises a sling (3) and a hanger (4), wherein the sling (3) is provided with a lifting lug (32) and a cushion beam (33), the cushion beam (33) is used to support the prefabricated component (1), and the hanger (4) is used to hang the sling (3) on the prefabricated component (1), so that the sling (3) can serve as a support for the cast-in-situ joint between the prefabricated component (1) and the completed main structure (2).

8. The method for installing a repair-free, self-balancing prefabricated component according to claim 7, characterized in that: The sling (3) comprises two main cross beams (31), each of the two main cross beams (31) is provided with a lifting lug (32), and the cushion beam (33) is placed on the two main cross beams (31).

9. The method for installing a repair-free, self-balancing prefabricated component according to claim 7, characterized in that: An L-shaped limiting block (34) is provided on the cushion beam (33), and the L-shaped limiting block (34) is used to limit the position of the prefabricated component (1).

10. The method for installing a repair-free, self-balancing prefabricated component according to claim 7, characterized in that: The hanger (4) comprises a lower supporting beam (41) and an upper supporting beam (42); the lower supporting beam (41) and the upper supporting beam (42) are connected via a suspension rod (43); and adjustment nuts are provided at both ends of the suspension rod (43).

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