A formwork support and reinforcement device for thick raft foundations

Abstract

This utility model discloses a formwork support and reinforcement device for thick raft foundations, relating to the field of foundation and substructure technology. It includes a support frame, diagonal supports, and connecting components. The support frame internally forms a triangular support structure through diagonal supports. The support frame includes a base rod, a first vertical rod, a second vertical rod, diagonal braces, and horizontal bars. The first vertical rods are connected to the second vertical rods by horizontal bars, which are parallel to each other. The tops of the first and second vertical rods are connected by diagonal braces. The bolts of this utility model can be unscrewed and reused after the formwork is removed. The support frame and diagonal supports are made of standardized square steel pipes, which are undamaged after removal, enabling modular turnover, reducing material waste, and conforming to the concept of green construction. All components are prefabricated, requiring only simple operations such as drilling, threading, and tightening during installation. No professional technicians are needed; construction can be completed after simple training, saving labor costs.

Description

Technical Field

[0001] This utility model relates to the field of foundation and substructure technology, and in particular to a formwork support and reinforcement device for a thick raft foundation. Background Technology

[0002] With the rapid advancement of urbanization, industrial plants are gradually relocating to the suburbs due to adjustments in urban functional layouts. Their site selection often faces areas with soft soil and high sensitivity to settlement. When constructing industrial plants in such areas, the use of thick raft foundations is becoming increasingly widespread in order to improve the overall rigidity of the building, balance differences in foundation settlement, and prevent structural cracking.

[0003] To ensure the safety and construction quality of formwork support during the construction of thick raft foundations, existing technologies have developed formwork support reinforcement devices for thick raft foundations. These devices typically use square steel pipes as the base components to build the support structure, which is then fixed to the external hardened ground using pre-embedded bolts and other connectors to support the outer formwork of the raft foundation.

[0004] However, existing formwork support and reinforcement devices have significant drawbacks in practical applications: the positions of the embedded bolts need to be precisely positioned in advance, and after concrete pouring, the positions of the embedded bolts inevitably shift, causing the installation position of the formwork support and reinforcement device to deviate, or even making installation impossible, thus affecting the installation and use of the device. This not only affects the forming quality of the raft foundation concrete pouring but may also lead to safety hazards due to insufficient support stability. This defect has become a key issue restricting the construction quality and efficiency of thick raft foundations. Utility Model Content

[0005] This utility model provides a formwork support and reinforcement device for thick raft foundations, which solves the technical problem of inaccurate positioning and thus affecting construction quality in the existing formwork support and reinforcement device installed with pre-embedded bolts.

[0006] To solve the above-mentioned technical problems, this utility model provides a formwork support and reinforcement device for thick raft foundations, including a support frame, diagonal supports, and connecting components; the support frame forms a triangular support structure through diagonal supports; the support frame includes a base rod, a first vertical rod, a second vertical rod, diagonal braces, and horizontal bars; the first vertical rods are arranged parallel to the second vertical rods through horizontal bars, the tops of the first and second vertical rods are connected by diagonal braces, and the bottoms of the first and second vertical rods are connected by a base rod; the connecting components are disposed on the base rods.

[0007] Preferably, the connecting assembly includes a screw and an expansion terminal; the expansion terminal is disposed in the hardened surface, the base rod has a mounting hole, the threaded end of the screw passes through the mounting hole and is threadedly engaged with the expansion terminal, and the expansion terminal expands by tightening the screw.

[0008] Preferably, the expansion terminal has an opening groove on its side and an anti-slip texture on its surface.

[0009] Preferably, the supporting frame is made of 50mm×50mm×4mm square steel tube; the diagonal support is made of 40mm×40mm×3mm square steel tube.

[0010] Preferably, the template support and reinforcement device further includes an inclined pad, and one end of the bottom rod is provided with an extension portion, with the inclined pad disposed between the extension portion of the bottom rod and the hardened surface.

[0011] Preferably, the length of the extension is 80-120 mm.

[0012] Compared with related technologies, the template support and reinforcement device for thick raft foundations provided by this utility model has the following beneficial effects:

[0013] This utility model provides a formwork support and reinforcement device for thick raft foundations. The expansion terminal features an opening groove on its side to ensure full expansion upon tightening, while the anti-slip texture on the surface further enhances friction with the hardened surface. Combined with the threaded connection of the screw, it provides stable pull-out resistance, preventing displacement of the support device during concrete pouring. The screw can be unscrewed and reused after formwork removal. The support frame and diagonal supports are standardized square steel pipes, undamaged after removal, enabling modular turnover, reducing material waste, and conforming to green construction principles. All components are prefabricated, requiring only simple operations such as drilling, threading, and tightening during installation. No professional technicians are needed; construction can be completed with minimal training, saving labor costs.

[0014] This utility model provides a formwork support and reinforcement device for thick raft foundations. The inclined pads can be flexibly adjusted to adjust the height difference, keeping the bottom rod horizontal and ensuring that the verticality of the vertical rod meets the specifications, thus avoiding the risk of dimensional deviation or cracking of the raft concrete due to formwork tilt. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0016] Figure 2 This is an overall front view of the present invention;

[0017] Figure 3 For the present utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0018] Figure 4 This is a schematic diagram of the expansion terminal structure of this utility model;

[0019] Figure 5This is a schematic diagram of the structure of Embodiment 2 of this utility model.

[0020] The following are the labeling elements in the diagram: 1. Support frame; 2. Diagonal support; 3. Connecting component; 4. Hardened surface; 5. Diagonal pad; 11. Base rod; 12. First vertical rod; 13. Second vertical rod; 14. Diagonal tie rod; 15. Horizontal rod; 111. Extension; 112. Mounting hole; 31. Screw; 32. Expansion terminal; 33. Opening groove; 34. Anti-slip texture.

[0021] For detailed implementation methods, please refer to...

[0022] The above-mentioned and other technical features and advantages of this utility model will be described in more detail below with reference to the accompanying drawings.

[0023] Example 1

[0024] Reference Figure 1-4 This embodiment provides a template support and reinforcement device for a thick raft foundation, including a support frame 1, diagonal supports 2, and connecting components 3. The support frame 1 internally forms a triangular support structure through the diagonal supports 2. The support frame 1 includes a base rod 11, a first vertical rod 12, a second vertical rod 13, a diagonal tie rod 14, and a horizontal rod 15. The first vertical rods 12 are arranged parallel to the second vertical rods 13 via the horizontal rod 15. The tops of the first vertical rods 12 and the second vertical rods 13 are connected by the diagonal tie rod 14, and the bottoms of the first vertical rods 12 and the second vertical rods 13 are connected by the base rod 11. The connecting components 3 are mounted on the base rod 11. The connecting components 3 include a screw 31 and an expansion terminal 32. The expansion terminal 32 is disposed in the hardened surface 4. The base rod 11 has a mounting hole 112. The threaded end of the screw 31 passes through the mounting hole 112 and threadedly engages with the expansion terminal 32. Tightening the screw 31 causes the expansion terminal 32 to expand. The expansion terminal 32 has an opening groove 33 on its side and anti-slip texture 34 on its surface.

[0025] This embodiment is applicable to the formwork support scenario of thick raft foundations in industrial plants in areas with soft soil and sensitive to settlement. It can meet the safety support requirements of raft foundation formwork through a stable support structure and a firm fixing method. The specific structure is as follows:

[0026] The supporting frame 1 is made of hot-rolled square steel pipe with a diameter of 50mm×50mm×4mm. It is a frame structure and includes five core components: bottom rod 11, first vertical rod 12, second vertical rod 13, diagonal tie rod 14, and cross rod 15.

[0027] The first vertical rod 12 and the second vertical rod 13 are the main vertical load-bearing components supporting the frame 1. They are set in parallel and their lengths match the height of the raft slab template.

[0028] The horizontal bar 15 is made of square steel tube of the same specification as the vertical bar, and is welded and fixed between the first vertical bar 12 and the second vertical bar 13 at intervals of 300-400mm along the height direction of the vertical bar to form a lateral tie and prevent the vertical bar from bending due to lateral force.

[0029] The two ends of the diagonal tie rod 14 are welded to the top of the first vertical rod 12 and the top of the second vertical rod 13, respectively, forming a triangular structure with the two vertical rods to enhance the anti-lateral displacement ability of the top of the support frame 1.

[0030] The bottom rod 11 is welded to the bottom of the first vertical rod 12 and the bottom of the second vertical rod 13 to provide bottom support for the support frame 1, and two mounting holes 112 with a diameter matching the screw 31 are pre-drilled on the bottom rod 11.

[0031] The diagonal support 2 is made of 40mm×40mm×3mm square steel tube, and its two ends are fixed inside the support frame 1 by welding.

[0032] Each diagonal support 2 and diagonal tie rod 14 form a wave-like structure, which together with the vertical and horizontal bars 15 of the support frame 1 form multiple closed triangular support structures.

[0033] The triangular support structure can distribute the lateral pressure transmitted by the raft slab formwork to the entire support frame 1, avoiding structural deformation caused by local stress concentration and ensuring that the rigidity of the support frame 1 meets the formwork requirements of thick raft slabs.

[0034] The connecting component 3 includes a screw 31 and an expansion terminal 32, which are used to fix the support frame 1 on the hardened surface 4, the hardened surface 4 being the hardened concrete layer on the outside of the raft slab.

[0035] The expansion terminal 32 has a cylindrical structure with two symmetrical slots 33 along the axial direction on its side. The outer surface is machined with diamond-shaped anti-slip texture, which can enhance the friction with the inner wall of the drilled hole on the hardened surface 4.

[0036] Installation steps:

[0037] 1. Before installation, drill holes on the hardened surface 4 according to the support positions marked by the chalk line, and insert the expansion terminal 32 into the holes;

[0038] 2. Align the bottom rod 11 of the support frame 1 with the position of the expansion terminal 32, so that the mounting hole 112 on the bottom rod 11 is aligned with the center hole of the expansion terminal 32. Then, screw the threaded end of the screw 31 through the mounting hole 112 and into the internal threaded hole of the expansion terminal 32.

[0039] 3. Tighten the screw 31 gradually with a wrench. The screw 31 pushes the lower part of the expansion terminal 32 to expand outward along the opening groove 33, so that the expansion terminal 32 tightly squeezes the inner wall of the drill hole, and finally achieves a firm fixation between the support frame 1 and the hardened surface 4, which meets the pull-out bearing capacity requirements.

[0040] After assembly, the triangular support structure formed by the support frame 1 and the diagonal support 2 has excellent lateral stiffness and can effectively resist the lateral pressure during the pouring of thick raft concrete. The connecting component 3 ensures that the support device has no risk of displacement through the expansion fixing and anti-slip texture design of the expansion terminal 32, and the screw 31 can be unscrewed and recycled after the raft formwork is removed, which meets the requirements of modular utilization.

[0041] Example 2

[0042] This embodiment, based on Embodiment 1, optimizes the scenario where the local flatness of the hardened surface 4 is insufficient by adding the inclined pad 5 and the extension 111. The specific improvements are as follows:

[0043] The template support and reinforcement device also includes a slanted pad 5. One end of the base rod 11 is provided with an extension 111, and the slanted pad 5 is disposed between the extension 111 of the base rod 11 and the hardened surface 4. The length of the extension 111 is 80-120mm.

[0044] In Embodiment 1, an extension 111 with a length of 80-120mm is left at one end of the bottom rod 11. The extension 111 can serve as a support carrier for the inclined pad 5, preventing the inclined pad 5 from directly pressing on the core area of ​​the support frame 1.

[0045] The inclined pad 5 has a right-angled triangle cross section. The level of the base rod 11 and the extension 111 is checked by a level. If the hardened surface 4 is found to be locally concave or convex, causing the base rod 11 to tilt, the inclined pad 5 is inserted between the extension 111 and the hardened surface 4. The placement position of the inclined pad 5 is adjusted according to the flatness error. The inclined surface of the inclined pad 5 compensates for the height difference of the hardened surface 4 until the level of the base rod 11 meets the requirements, thereby ensuring the verticality of the first vertical rod 12 and the second vertical rod 13.

[0046] The remaining implementation methods in this embodiment are the same as those in Embodiment 1.

Claims

1. A formwork support and reinforcement device for a thick raft foundation, characterized in that: It includes a support frame, diagonal supports, and connecting components; the support frame forms a triangular support structure through diagonal supports; the support frame includes a base rod, a first vertical rod, a second vertical rod, diagonal braces, and horizontal bars; the first vertical rods are arranged parallel to the second vertical rods through horizontal bars, the tops of the first and second vertical rods are connected by diagonal braces, and the bottoms of the first and second vertical rods are connected by the base rod; the connecting components are disposed on the base rod.

2. The formwork support and reinforcement device for a thick raft foundation according to claim 1, characterized in that, The connecting assembly includes a screw and an expansion terminal; the expansion terminal is disposed in the hardened surface, and the base rod has a mounting hole. The threaded end of the screw passes through the mounting hole and is threadedly engaged with the expansion terminal. Tightening the screw causes the expansion terminal to expand.

3. The formwork support and reinforcement device for a thick raft foundation according to claim 2, characterized in that, The expansion terminal has an opening groove on its side and an anti-slip texture on its surface.

4. The formwork support and reinforcement device for a thick raft foundation according to claim 1, characterized in that, The supporting frame is made of 50mm×50mm×4mm square steel tubes; the diagonal support is made of 40mm×40mm×3mm square steel tubes.

5. The formwork support and reinforcement device for a thick raft foundation according to claim 1, characterized in that, The template support and reinforcement device also includes an inclined pad, and one end of the bottom rod has an extension, with the inclined pad disposed between the extension of the bottom rod and the hardened surface.

6. The formwork support and reinforcement device for a thick raft foundation according to claim 5, characterized in that, The length of the extension is 80-120mm.

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