Raft foundation post-pouring belt structure

Abstract

The application relates to a raft foundation post-pouring belt structure and relates to the technical field of raft foundations of building engineering, which comprises a raft foundation main body, the inner side of the raft foundation main body is provided with a plurality of pairs of anchoring rods arranged in pairs, the bottom surface of each anchoring rod is fixedly connected with an anchoring plate, and the bottom surface of each anchoring plate is fixedly connected with a threaded rod. The anchoring rods, the anchoring plates and the threaded rods are matched, the bearing bottom mold plate and the fastening nut are matched, the scaffolding needs not to be erected layer by layer from the foundation, the bottom space occupation is avoided, the removal efficiency is remarkably improved, the safety risk is reduced, meanwhile, the steel wire rope is reeled and unreeled through the winding roller, the fixed buckle and the lifting lug are connected, the bearing bottom mold plate is formed into multi-point suspension auxiliary support, the anti-reverse assembly is locked with the winding roller through the clamping block and the ratchet wheel, the steel wire rope is prevented from being loosened, the support system always keeps stable pre-tightening force under heavy load working conditions such as concrete pouring, and the support system effectively resists sudden load impact.

Description

Technical Field

[0001] This application relates to the field of raft foundation technology in building engineering, and in particular to a post-cast strip structure for raft foundations. Background Technology

[0002] Raft foundations, as an important foundation type for high-rise buildings, bridges, and other engineering projects, bear the load from the superstructure and transfer it to the ground through a monolithic reinforced concrete structure. In the construction of post-cast strips, the raft foundation body needs to be divided into several construction sections. The post-cast strip concrete is poured only after the initial concrete has shrunk and stabilized, in order to address issues such as structural temperature deformation and shrinkage cracking. In traditional raft foundation post-cast strip structures, the support and fixation of the bottom formwork is a critical link, as its stability directly affects the quality of the post-cast strip concrete and the overall structural safety.

[0003] Currently, the support units for the bottom formwork of traditional post-pouring strips generally use multiple sets of supports to support and fix them from below the raft foundation. However, the supports need to be erected layer by layer from the foundation or cushion layer to the bottom of the formwork. After the concrete strength of the post-pouring strip reaches the standard, the supports need to be removed layer by layer from the bottom. At this time, the bottom space is largely occupied by the supports, and the dismantling operation space is limited, resulting in low dismantling efficiency and safety risks such as support instability and component falling. Utility Model Content

[0004] The purpose of this application is to provide a post-cast strip structure for raft foundations, which features the cooperative action of anchor rods, anchor plates, and threaded rods, along with the support of the bottom formwork and fastening nuts. This eliminates the need to build supports layer by layer from the foundation, avoids occupying space at the bottom layer, significantly improves demolition efficiency, and reduces safety risks, thus solving the problems mentioned in the background art.

[0005] This application provides a post-cast strip structure for a raft foundation, employing the following technical solution: It includes a raft foundation body. Multiple paired anchor rods are arranged on the inner side of the raft foundation body. An anchor plate is fixedly connected to the bottom surface of each anchor rod. A threaded rod is fixedly connected to the bottom surface of each anchor plate. A load-bearing bottom template is provided at the bottom of the raft foundation body. The load-bearing bottom template is sleeved on the outer side of the threaded rods. A fastening nut is threadedly connected to the outer side of each threaded rod. The fastening nut is located below the load-bearing bottom template. A support frame is installed at the bottom of the load-bearing bottom template. An internally threaded sleeve is fixedly connected to the outer side of each anchor plate. A lifting lug is threadedly connected to the inner side of each internally threaded sleeve. The support... Two sets of symmetrical support seats are fixedly connected to the outer side of the frame. A winding roller is rotatably connected to the inner side of each set of support seats. Multiple steel wire ropes are fixedly wound around the outer side of each winding roller. A fixing buckle is fixedly connected to one end of each steel wire rope, and the outer side of the fixing buckle is engaged with the inner side of the lifting lug. An anti-reverse assembly is provided on the outer side of each set of support seats. The anti-reverse assembly includes a connecting shaft and a fixing plate. One end of the connecting shaft passes through the outer side of the support seat and is fixedly connected to one end of the winding roller. Two springs are fixedly connected to the outer side of the fixing plate. The other ends of the two springs are fixedly connected to a connecting plate. A locking block is fixedly connected to the outer side of the connecting plate. A ratchet is fixedly connected to the outer side of the connecting shaft, and the ratchet and the locking block mesh with each other.

[0006] By adopting the above technical solution, and through the coordinated action of anchor rods, anchor plates, threaded rods, and fastening nuts, the load-bearing bottom formwork can be fixed without the need to erect supports layer by layer from the foundation or pad layer upwards. This avoids the bottom space being occupied by supports, providing ample space for subsequent dismantling operations and effectively improving dismantling efficiency. At the same time, when the winding roller rotates and tightens the wire rope, the wire rope tightly connects the anchor plate to the support frame through the lifting lugs, thereby providing auxiliary fixation for the load-bearing bottom formwork. It can also distribute the load to multiple anchor points, significantly enhancing the compressive and deformation resistance of the load-bearing bottom formwork. Furthermore, the anti-reverse component locks the winding roller in real time to prevent the wire rope from slackening, ensuring that the support system maintains a stable preload under heavy load conditions such as concrete pouring, effectively resisting sudden load impacts.

[0007] Preferably, the outer side of the anchor rod is pre-embedded in the inner side of the raft foundation body.

[0008] By adopting the above technical solution, the anchor rods form a stable connection structure with the raft foundation, which enhances the load-bearing capacity and stability of the anchor rods and ensures that the entire support system can reliably withstand the loads during the construction of the post-pouring strip.

[0009] Preferably, the load-bearing bottom template and the support frame are fixedly connected by bolts.

[0010] By adopting the above technical solution, the load-bearing bottom formwork and the support frame are connected by bolts, which facilitates the installation and disassembly of the load-bearing bottom formwork and the support frame, improves construction efficiency, and ensures the reliability of the connection between the two, thus ensuring the stability of the support structure.

[0011] Preferably, the number and position of the wire ropes are adapted to the number and position of the lifting lugs.

[0012] By adopting the above technical solution, the steel wire rope, together with the lifting lugs, forms a multi-point suspension auxiliary support structure for the load-bearing bottom formwork, so that the load is evenly transferred to the anchor plate and the main body of the raft foundation through the steel wire rope. With the anti-reverse component locking the rotation of the winding roller, the swaying and settlement of the support frame can be effectively suppressed, and the load-bearing capacity and stability of the load-bearing bottom formwork can be significantly improved.

[0013] Preferably, the outer side of the fixing plate is fixedly connected to the outer side of the support base, the outer side of the connecting shaft is rotatably connected to the inner side of the support base, and two guide posts are fixedly connected to the outer side of the connecting plate, with the outer side of the guide posts inserted into the inner side of the fixing plate.

[0014] By adopting the above technical solution, the two guide posts can guide the movement of the connecting plate, thereby ensuring that the locking block can stably engage with the ratchet.

[0015] Preferably, both guide posts have insertion holes on their outer sides, the insertion holes are located in the middle of the locking block, a placement block is fixedly connected to the outer side of the fixing plate, and a pin is placed on the inner side of the placement block, the size of the pin is adapted to the inner wall size of the insertion hole.

[0016] By adopting the above technical solution, when it is necessary to remove the support structure, the connecting plate is pushed to move the guide column so that the insertion hole is located on the other side of the fixed plate. At this time, the connection between the locking block and the ratchet is released by inserting the pin into the insertion hole, thereby allowing the winding roller to rotate freely. The operation is convenient and quick, improving the flexibility and convenience of construction.

[0017] Preferably, each of the two sets of support seats has a rotating handle rotatably mounted on the side away from the anti-reverse component, and the rotating end of the rotating handle is fixedly connected to the rotating end of the winding roller.

[0018] By adopting the above technical solution, the rotating handle can easily control the rotation of the winding roller, thereby conveniently adjusting the tension of the wire rope and improving the convenience and efficiency of construction operations.

[0019] Preferably, a bottom formwork body is fixedly connected to the upper side of the bearing bottom formwork, the surface of the bottom formwork body is coated with a release agent, and a post-pouring strip structure body is provided on the inner side of the raft foundation body. The post-pouring strip structure body includes a steel reinforcement skeleton, and the outer side of the steel reinforcement skeleton is fixedly connected to the inner side of the raft foundation body.

[0020] By adopting the above technical solution, the release agent on the surface of the bottom formwork can reduce the bonding force between the concrete and the formwork, making it easier to remove the formwork later. At the same time, the steel reinforcement cage is fixedly connected to the main body of the raft foundation, which enhances the integrity and load-bearing capacity of the post-cast strip structure and ensures the structural strength and stability of the raft foundation.

[0021] In summary, this application includes at least one of the following beneficial technical effects: This type of raft foundation post-cast strip structure, through the coordinated action of anchor rods, anchor plates, and threaded rods, along with the supporting bottom formwork and fastening nuts, eliminates the need to erect supports layer by layer from the foundation, avoiding the occupation of the bottom space, significantly improving demolition efficiency and reducing safety risks. At the same time, the wire rope is wound and unwound through the winding roller, and is secured with the fixing buckle and lifting lug to form a multi-point suspension auxiliary support for the supporting bottom formwork. Meanwhile, the anti-reverse component locks the winding roller through the engagement of the locking block and ratchet, preventing the wire rope from slackening. This ensures that the support system maintains a stable preload under heavy load conditions such as concrete pouring, effectively resisting sudden load impacts. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the entire application; Figure 2 This is a three-dimensional structural diagram of the entire application from another perspective; Figure 3 This is a three-dimensional structural diagram of the anchor rod, anchor plate, and threaded rod of this application; Figure 4 This is a three-dimensional structural diagram of the winding roller and wire rope of this application; Figure 5 This is a three-dimensional structural diagram of the anti-reverse component of this application.

[0023] In the picture: 1. Raft foundation main body; 2. Anchor rod; 3. Anchor plate; 4. Threaded rod; 5. Fastening nut; 6. Bearing bottom formwork; 7. Support frame; 8. Internal threaded sleeve; 9. Lifting lug; 10. Support base; 11. Winding roller; 12. Steel wire rope; 13. Fixing buckle; 14. Anti-reverse assembly; 1401. Connecting shaft; 1402. Fixing plate; 1403. Spring; 1404. Connecting plate; 1405. Locking block; 1406. Insertion hole; 1407. Placement block; 1408. Pin; 1409. Ratchet; 1410. Guide post; 15. Rotating handle; 16. Bottom formwork main body; 17. Reinforcing steel skeleton. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1 - Appendix Figure 5 This application will be described in further detail below.

[0025] Example 1: A post-cast strip structure for a raft foundation, please refer to... Figure 1 , Figure 2 and Figure 4 The system includes a raft foundation main body 1. Multiple paired anchor rods 2 are installed on the inner side of the raft foundation main body 1. An anchor plate 3 is fixedly connected to the bottom surface of each anchor rod 2. A threaded rod 4 is fixedly connected to the bottom surface of each anchor plate 3. A load-bearing bottom template 6 is installed at the bottom of the raft foundation main body 1, fitted onto the outside of the threaded rods 4. A fastening nut 5 is threadedly connected to the outside of each threaded rod 4, located below the load-bearing bottom template 6. A support frame 7 is installed at the bottom of the load-bearing bottom template 6. An internally threaded sleeve 8 is fixedly connected to the outside of each anchor plate 3, and a lifting lug 9 is threadedly connected to the inside of each internally threaded sleeve 8. Two sets of symmetrical support seats 10 are fixedly connected to the outer side of the support frame 7. The inner side of each set of support seats 10 is rotatably connected to a winding roller 11. Multiple steel wire ropes 12 are fixedly wound on the outer side of each winding roller 11. One end of each steel wire rope 12 is fixedly connected to a fixing buckle 13, and the outer side of the fixing buckle 13 is snapped into the inner side of the lifting lug 9. The bearing bottom template 6 and the support frame 7 are fixedly connected by bolts. The above-mentioned bearing bottom template 6 and support frame 7 are connected by bolts, which facilitates the installation and disassembly between the bearing bottom template 6 and the support frame 7, improves construction efficiency, and ensures the reliability of the connection between the two, thus ensuring the stability of the support structure.

[0026] Please refer to Figure 4 and Figure 5Both sets of support seats 10 are equipped with anti-reverse components 14 on their outer sides. Each anti-reverse component 14 includes a connecting shaft 1401 and a fixing plate 1402. One end of the connecting shaft 1401 passes through the outer side of the support seat 10 and is fixedly connected to one end of the winding roller 11. Two springs 1403 are fixedly connected to the outer side of the fixing plate 1402. The other ends of the two springs 1403 are fixedly connected to a connecting plate 1404. A locking block 1405 is fixedly connected to the outer side of the connecting shaft 1401. A ratchet 1409 is fixedly connected to the outer side of the connecting shaft 1401, and the ratchet 1409 and the locking block 1405 mesh with each other. The outer side of the fixing plate 1402 is fixedly connected to the outer side of the support seat 10, and the outer side of the connecting shaft 1401 is rotatably connected to the inner side of the support seat 10. Two guide posts 1410 are fixedly connected to the outer side of the connecting plate 1404, and the outer sides of the guide posts 1410 are inserted into the inner side of the fixing plate 1402. The two guide posts 1410 guide the movement of the connecting plate 1404, thereby ensuring that the locking block 1405 can stably engage with the ratchet 1409. The outer sides of the two guide posts 1410 are provided with insertion holes 1406, which are located in the middle of the locking block 1405. The outer side of the fixing plate 1402 is fixedly connected to the placement block 1407, and the inner side of the placement block 1407 is provided with a pin 1408. The size of the pin 1408 is adapted to the inner wall size of the insertion hole 1406. When the support structure needs to be removed, the connecting plate 1404 is pushed to move the guide posts 1410, so that the insertion hole 1406 is located on the other side of the fixing plate 1402. At this time, the connection between the locking block 1405 and the ratchet 1409 is released by inserting the pin 1408 into the insertion hole 1406, thereby allowing the winding roller 11 to rotate freely. The operation is convenient and quick, improving the flexibility and convenience of construction.

[0027] Example 2: A post-cast strip structure for a raft foundation, please refer to... Figure 2 , Figure 3 and Figure 4The number and position of the wire ropes 12 are matched with the number and position of the lifting lugs 9. The wire ropes 12, together with the lifting lugs 9, form a multi-point suspension auxiliary support structure for the load-bearing bottom template 6, so that the load is evenly transferred to the anchor plate 3 and the raft foundation body 1 through the wire ropes 12. With the anti-reverse component 14 locking the rotation of the winding roller 11, the swaying and settlement of the support frame 7 can be effectively suppressed, significantly improving the load-bearing capacity and stability of the load-bearing bottom template 6. The two sets of support seats 10 are each rotatably installed with a handle 15 on the side away from the anti-reverse component 14, and the rotating end of the handle 15 is fixedly connected to the rotating end of the winding roller 11. The rotating handle 15 can easily control the rotation of the winding roller 11, thereby facilitating adjustment. The tension of the wire rope 12 improves the convenience and efficiency of construction operations. The bottom formwork body 16 is fixedly connected to the upper side of the bottom formwork 6. The surface of the bottom formwork body 16 is coated with a release agent. The inner side of the raft foundation body 1 is provided with a post-pouring strip structure body, which includes a steel reinforcement cage 17. The outer side of the steel reinforcement cage 17 is fixedly connected to the inner side of the raft foundation body 1. The release agent on the surface of the bottom formwork body 16 can reduce the adhesion between the concrete and the formwork, making it easier to remove the formwork later. At the same time, the steel reinforcement cage 17 is fixedly connected to the raft foundation body 1, which enhances the integrity and load-bearing capacity of the post-pouring strip structure body, ensuring the structural strength and stability of the raft foundation.

[0028] The implementation principle of this application embodiment is as follows: During construction, the anchor rod 2 is first pre-embedded inside the raft foundation body 1. Then, the bearing bottom template 6 is sleeved on the outside of the threaded rod 4, and the position is initially positioned by tightening the nut 5. Subsequently, the support frame 7 is installed at the bottom of the bearing bottom template 6, and the two are fixedly connected by bolts. The steel wire rope 12 wound on the outside of the winding roller 11 is clamped to the lifting lug 9 on the outside of the anchor plate 3 by the fixing buckle 13. The construction personnel turn the handle 15 to drive the winding roller 11 to wind the steel wire rope 12. The tension of the steel wire rope 12 is transmitted to the anchor plate 3 through the lifting lug 9, thereby adjusting the position of the bearing bottom template 6. During the rotation of the handle 15, the anti-reverse component 14's locking block 1405 and ratchet 14 09 Engagement automatically locks the rotation of the winding roller 11, ensuring stable tension of the wire rope 12 and forming a rigid support system between the support frame 7 and the bearing bottom template 6. Once the position of the bearing bottom template 6 is confirmed, it is finally fixed by tightening the nut 5, completing the template installation. When the concrete strength of the post-pouring strip reaches the standard and needs to be removed, there is no need to remove the traditional supports layer by layer. Simply loosen the nut 5 and slowly release the winding roller 11 through the handle 15, allowing the bearing bottom template 6 to be lowered smoothly under the control of the wire rope 12. The bottom space has ample operating space due to the absence of supports, allowing for safe and convenient demolition. Furthermore, the release agent on the surface of the bottom template body 16 ensures that the template can be quickly removed after the concrete solidifies.

[0029] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A post-cast strip structure for a raft foundation, comprising a raft foundation body (1), characterized in that: The inner side of the raft foundation body (1) is provided with a plurality of paired anchor rods (2), and the bottom surface of each anchor rod (2) is fixedly connected with an anchor plate (3). The bottom surface of each anchor plate (3) is fixedly connected with a threaded rod (4). The bottom of the raft foundation body (1) is provided with a bearing bottom template (6). The bearing bottom template (6) is sleeved on the outside of the threaded rod (4). The outside of each threaded rod (4) is threadedly connected with a fastening nut (5). The fastening nut (5) is located on the lower side of the bearing bottom template (6). The bottom of the bearing bottom template (6) is installed with a support frame (7). The outside of each anchor plate (3) is fixedly connected with an internal threaded sleeve (8). The inside of each internal threaded sleeve (8) is threadedly connected with a lifting lug (9). The outside of the support frame (7) is fixedly connected with two sets of symmetrical support seats (10). The inside of the two sets of support seats (10) is rotatably connected with a winding roller (11). Multiple steel wire ropes (12) are fixedly wound on the outer side of each winding roller (11). One end of each steel wire rope (12) is fixedly connected to a fixing buckle (13), and the outer side of the fixing buckle (13) is engaged with the inner side of the lifting lug (9). Anti-reverse assembly (14) is provided on the outer side of both sets of support seats (10). The anti-reverse assembly (14) includes a connecting shaft (1401) and a fixing plate (1402). One end of the connecting shaft (1401) passes through the support seat (10). The outer side of the fixed plate (1402) is fixedly connected to one end of the winding roller (11). Two springs (1403) are fixedly connected to the outer side of the fixed plate (1402). The other end of the two springs (1403) is fixedly connected to the connecting plate (1404). A locking block (1405) is fixedly connected to the outer side of the connecting plate (1404). A ratchet (1409) is fixedly connected to the outer side of the connecting shaft (1401). The ratchet (1409) and the locking block (1405) mesh with each other.

2. The post-cast strip structure for a raft foundation according to claim 1, characterized in that: The outer side of the anchor rod (2) is pre-embedded in the inner side of the raft foundation body (1).

3. The post-cast strip structure for a raft foundation according to claim 1, characterized in that: The load-bearing bottom template (6) and the support frame (7) are fixedly connected by bolts.

4. The post-cast strip structure for a raft foundation according to claim 1, characterized in that: The number and position of the wire ropes (12) are adapted to the number and position of the lifting lugs (9).

5. The post-cast strip structure for a raft foundation according to claim 1, characterized in that: The outer side of the fixing plate (1402) is fixedly connected to the outer side of the support base (10), the outer side of the connecting shaft (1401) is rotatably connected to the inner side of the support base (10), and the outer side of the connecting plate (1404) is fixedly connected to two guide posts (1410), and the outer side of the guide posts (1410) is inserted into the inner side of the fixing plate (1402).

6. The post-cast strip structure for a raft foundation according to claim 5, characterized in that: Both guide posts (1410) have insertion holes (1406) on their outer sides. The insertion holes (1406) are located in the middle section of the locking block (1405). A placement block (1407) is fixedly connected to the outer side of the fixing plate (1402), and a pin (1408) is placed on the inner side of the placement block (1407). The size of the pin (1408) is adapted to the inner wall size of the insertion hole (1406).

7. The post-cast strip structure for a raft foundation according to claim 1, characterized in that: Both sets of support seats (10) have a rotating handle (15) rotatably mounted on the side away from the anti-reverse component (14), and the rotating end of the rotating handle (15) is fixedly connected to the rotating end of the winding roller (11).

8. The post-cast strip structure for a raft foundation according to claim 1, characterized in that: The bottom formwork body (16) is fixedly connected to the upper side of the bearing bottom formwork (6). The surface of the bottom formwork body (16) is coated with a release agent. The inner side of the raft foundation body (1) is provided with a post-pouring strip structure body. The post-pouring strip structure body includes a steel reinforcement skeleton (17). The outer side of the steel reinforcement skeleton (17) is fixedly connected to the inner side of the raft foundation body (1).

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