Fabricated building foundation pit support form

Abstract

A prefabricated building foundation pit support template, including foundation pit and the side baffle that is arranged and set up along its inner wall both sides longitudinal arrangement, both sides side baffle outer wall near the center of foundation pit one side is equipped with side roof, and the bottom of two side roofs is equipped with the support platform for horizontally supporting, and is hung on the side baffle, so that side roof is suspended and is attached on the outer wall of side baffle, both sides side roof near the side of corresponding support platform is equipped with the hanging platform, and the inside of two hanging platforms is commonly equipped with the telescopic mechanism, because the utility model discloses the overall cooperation of support platform, hanging platform, telescopic mechanism, changes the three-step action of insertion- push top-limit into the traditional bolt connection, first, support platform bears the dead weight of side roof, hanging platform completes the quick hanging of side baffle, telescopic mechanism then synchronously tightens outwardly at one time, and the bolt is not repeatedly screwed on site, and a person can complete installation and removal, significantly shorten the support period, and the maintenance hidden danger caused by bolt corrosion and jamming is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of building construction, specifically to a prefabricated building foundation pit support formwork. Background Technology

[0002] Prefabricated building foundation pit support mainly involves the field of foundation pit support technology in municipal pipeline, cable laying, and relocation construction. During construction, a narrow and long foundation trench is first excavated on the ground, and then prefabricated support template units are vertically spliced ​​along the trench wall to form a temporary retaining structure for the soil on both sides, replacing the traditional slope protection, reducing land occupation, shortening the construction period, and providing safe working space for subsequent pipeline laying. Its working principle is to use multiple templates and horizontal supports to form a closed frame, converting lateral earth pressure into internal pressure bar force, thereby maintaining the stability of the trench wall. Existing prefabricated foundation pit support formwork has obvious defects in practical applications: First, bolts or hoops are generally used to connect the support formwork on both sides. When supporting or disassembling, each bolt needs to be tightened manually, which is time-consuming and labor-intensive, and the bolts are prone to rust and jamming. Second, once the frame is assembled, it becomes a fixed size and cannot be fine-tuned according to changes in the width and depth of the trench. This results in uneven support for uneven or partially collapsed soil walls, which can easily lead to gaps and displacement, resulting in unsatisfactory support effects. In severe cases, secondary reinforcement is required, increasing costs and risks. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the problem that existing templates for foundation pit support generally use bolts or clamps for connection, which makes dismantling and installation more troublesome. Secondly, once the frame is assembled, it cannot be finely adjusted according to changes in the width and depth of the trench, resulting in uneven support for uneven or partially collapsed soil walls.

[0004] The technical solution adopted to solve the above technical problems is: A prefabricated building foundation pit support formwork includes a foundation pit and side baffles arranged longitudinally along both sides of its inner wall. Each of the two side baffles has a side top plate on the side of its outer wall near the center of the foundation pit. The bottom of each of the two side top plates is provided with a support platform for horizontally supporting them and is hung on the side baffle, so that the side top plate is suspended and attached to the outer wall of the side baffle. Each of the two side top plates has a hanging platform on the side near the corresponding support platform. The two hanging platforms are provided with a telescopic mechanism inside. When the telescopic mechanism extends, it pushes against the hanging platforms and side top plates on both sides and pushes them outward.

[0005] As a preferred technical solution of this utility model, the outer side walls of the two side top plates are provided with positioning grooves that match the outer side walls of the corresponding support and hanging platform, and the two support platforms and the two hanging platforms are respectively inserted into the interior of the corresponding positioning grooves.

[0006] As a preferred technical solution of this utility model, the telescopic mechanism includes an outer cylinder and an inner cylinder that are slidably connected to each other. The outer side wall of the inner cylinder is provided with positioning holes, and the outer side wall of the outer cylinder is provided with limiting holes. The limiting holes on both sides are provided with limiting components that match the corresponding positioning holes. The inner cylinder is provided with a telescopic device at one end near the outer cylinder, and the telescopic device is located inside the outer cylinder.

[0007] As a preferred technical solution of this utility model, the inner diameter of the limiting hole is larger than the inner diameter of the positioning hole, which facilitates actual observation of the movement position of the positioning hole inside the outer cylinder. Limiting grooves are provided on both sides of the outer cylinder near the corresponding limiting hole to enhance the stability of the position of the limiting component after it is inserted into the positioning hole and the limiting hole, and to prevent it from falling off.

[0008] As a preferred technical solution of this utility model, the limiting component includes a limiting head and a limiting block that match the inside of the limiting hole and the limiting groove. The insertion end of the limiting head is set with an arc. A pull rod is connected to one side of the limiting head and the limiting block, and a handle is connected to the other end of the pull rod.

[0009] As a preferred embodiment of this utility model, the outer wall of the inner cylinder is connected to a slider, and the slider is slidably connected to a groove provided inside the outer cylinder.

[0010] As a preferred embodiment of this utility model, the outer cylinder has a placement cavity inside, the telescopic device is disposed inside the placement cavity, and a cover plate is hinged to one side of the placement cavity.

[0011] The beneficial effects of this utility model are as follows: 1. This utility model, through the overall coordination of the support platform, hanging platform, and telescopic mechanism, changes the traditional bolt connection to a three-step action of insertion-push-limit. First, the support platform bears the weight of the side top plate, the hanging platform completes the quick connection with the side baffle, and then the telescopic mechanism pushes outward synchronously in one go. There is no need to repeatedly tighten the bolts on site, and a single person can complete the installation and dismantling, which significantly shortens the support cycle and avoids the maintenance risks caused by bolt corrosion and jamming. 2. The inner and outer cylinders driven by the telescopic device can be infinitely adjusted within a certain stroke, so that the support width matches the actual spacing of the trench wall in real time. The multi-position locking of the limiting component and the positioning hole ensures that the jacking force is evenly transmitted. No matter if the trench wall collapses locally or the backfilling is uneven, the side top plate can be moved to fill the gap, stick to the soil, eliminate gaps, reduce the probability of secondary reinforcement, and thus obtain more reliable lateral support at a lower cost. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the main structure of this utility model; Figure 3 This is a schematic diagram of the telescopic mechanism of this utility model; Figure 4 This is a cross-sectional structural diagram of the telescopic mechanism of this utility model.

[0013] In the diagram: 1. Excavation pit; 2. Side baffle; 3. Side top plate; 4. Support platform; 5. Positioning groove; 6. Hanging platform; 7. Outer cylinder; 8. Inner cylinder; 9. Positioning hole; 10. Limiting hole; 11. Limiting groove; 12. Limiting component; 13. Telescopic device; 14. Slider; 15. Slide groove; 16. Cover plate; 17. Limiting head; 18. Limiting block; 19. Tie rod; 20. Handle. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0015] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0016] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0017] In the above description of this utility model, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0018] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0019] Example 1 exist Figures 1-4 This utility model provides a technical solution: a prefabricated building foundation pit support template, including a foundation pit 1 and side baffles 2 arranged longitudinally along both sides of its inner wall. Each side baffle 2 has a side top plate 3 on the outer side of its outer wall near the center of the foundation pit 1. The bottom of each side top plate 3 has a support platform 4 for horizontally supporting it, which is hung on the side baffle 2, so that the side top plate 3 is suspended and attached to the outer side wall of the side baffle 2. Each side top plate 3 has a hanging platform 6 on the side near the corresponding support platform 4. The two hanging platforms 6 have a common telescopic mechanism inside. Because the hanging platforms 6 and the telescopic mechanism are located near the support platform 4, the telescopic mechanism is more stable during telescopic movement. When the telescopic mechanism extends, it presses against the two hanging platforms 6 and the side top plate 3 and pushes outward. Each side top plate 3 has a positioning groove 5 on its outer side wall that matches the outer side wall of the corresponding support platform 4 and the hanging platform 6. The two support platforms 4 and the two hanging platforms 6 are respectively inserted into the corresponding positioning groove 5.

[0020] In one aspect of this embodiment, the telescopic mechanism includes an outer cylinder 7 and an inner cylinder 8 that are slidably connected to each other. The outer side wall of the inner cylinder 8 is provided with a positioning hole 9, and the outer side wall of the outer cylinder 7 is provided with a limiting hole 10. The inner cylinder 8 is provided with a limiting component 12 that matches the inner side of the corresponding positioning hole 9. The inner cylinder 8 is provided with a telescopic device 13 at one end near the outer cylinder 7. The telescopic device 13 is disposed inside the outer cylinder 7. The outer cylinder 7 has a placement cavity inside, and the telescopic device 13 is installed inside the placement cavity. A cover plate 16 is hinged to one side of the placement cavity. The cover plate 16 is used to close the placement cavity without interruption, which is convenient for long-term use. It should be noted that the telescopic device 13 can be one of the following devices: an external cylinder, a hydraulic cylinder, or a jack, configured according to construction requirements. When supporting, the outer cylinder 7 and the inner cylinder 8 are first placed inside the two side hanging platforms 6 to ensure that their placement position does not shake. At the same time, the two side hanging platforms 6 are placed on the corresponding side top plates 3. Then, the telescopic device 13 is placed inside the outer cylinder 7, and the external power source controls the telescopic device 13 to extend and retract. The inner cylinder 8 is pushed from inside the cavity to the other end along the inner cylinder 7, thereby simultaneously pushing the top plates 3 at both ends to press against the side baffles 2 with a horizontal outward thrust. At the same time, according to actual needs, the limiting head 17 in the limiting component is inserted into the corresponding positioning hole 9 through the limiting hole 10 to position the outward expansion distance. The positioning by the positioning heads 17 on both sides at the same time is more stable. Secondly, the positioning head 17 can be pulled out directly during disassembly. If the positioning head 17 is bent, it can be removed again with the help of the telescopic device 13. Disassembly and assembly are relatively convenient, which greatly improves construction efficiency and enhances the support effect.

[0021] In one aspect of this embodiment, the inner diameter of the limiting hole 10 is larger than the inner diameter of the positioning hole 9, which facilitates actual observation of the movement position of the positioning hole 9 inside the outer cylinder 7. Limiting grooves 11 are provided on both sides of the outer cylinder 7 near the corresponding limiting hole 10 to enhance the stability of the position of the limiting component 12 after it is inserted into the positioning hole 9 and the limiting hole 10, and to prevent it from falling off. The limiting assembly 12 includes a limiting head 17 and a limiting block 18 that match the inside of the limiting hole 10 and the limiting groove 11. The limiting block 18 is used to control the stability of the position of the limiting head 17 after it is inserted into the positioning port 9. The insertion end of the limiting head 17 is arc-shaped to facilitate actual insertion and removal from the positioning hole 9. A pull rod 19 is connected to one side of the limiting head 17 and the limiting block 18. A handle 20 is connected to the other end of the pull rod 19 to facilitate the removal of the limiting head 17 and the limiting block 18.

[0022] In one aspect of this embodiment, a slider 14 is connected to the outer wall of the inner cylinder 8. The slider 14 is slidably connected to a groove 15 provided inside the outer cylinder 7, thereby controlling the inner cylinder 8 to move horizontally along the inside of the outer cylinder 7.

[0023] The working principle of this utility model is as follows: In actual use, this prefabricated support structure first excavates a narrow and long foundation pit 1 at the location where municipal pipelines are to be laid. After cleaning the bottom of the pit, side baffles 2 are hoisted piece by piece along the longitudinal direction of both sides of the pit wall. The baffles are interlocked to reduce soil leakage and to initially position them close to the soil surface. Then, the positioning groove 5 on the outside of the prefabricated side top plate 3 is aligned with the support platform 4 and hanging platform 6 that are fixed on the side baffle 2. The side top plate 3 is suspended and hung using the horizontal support surface of the support platform 4, so that the side... The inner surface of the top plate 3 is attached to the outer surface of the side baffle 2, completing the boltless insertion and assembly of the two side templates. After the two side top plates 3 and the hanging platform 6 are in place, the outer cylinder 7 and the inner cylinder 8 are horizontally placed between the two hanging platforms 6. The telescopic device 13, which can be a cylinder, hydraulic cylinder or jack, is pre-installed inside the outer cylinder 7. When the telescopic device 13 is activated, its piston end pushes the inner cylinder 8 to extend smoothly outward along the sliding groove 15 and the slider 14 inside the outer cylinder 7. The thrust at both ends of the inner cylinder 8 acts synchronously on the two hanging platforms 6, causing the side top plate 3 to be pushed outward and... The side baffle 2 is pressed in real time to eliminate gaps caused by unevenness or partial collapse of the groove wall. During the advancement process, the operator observes the position of the positioning hole 9 on the outer side of the inner cylinder 8 through the larger diameter limiting hole 10 on the outer cylinder 7. When the tightening force reaches the design requirements, the limiting head 17 of the limiting component 12 is inserted through the limiting hole 10 into the corresponding positioning hole 9. At the same time, the limiting block 18 is embedded in the limiting groove 11 to form a mechanical lock and prevent retraction. The limiting head 17 with the arc end and the pull rod 19 with handle 20 facilitate quick... The insertion and removal mechanism enables reliable fixation after stepless adjustment. During disassembly, simply pull out the limit head 17, retract the telescopic device 13, and the inner cylinder 8 will retract into the outer cylinder 7. The outer cylinder 7 and inner cylinder 8 can then be removed as a whole. Subsequently, lift the side top plate 3 to detach it from the support platform 4 and the hanging platform 6, and the side baffle 2 can be removed piece by piece. The entire process does not require repeated tightening of bolts and can be completed by a single person, significantly shortening the assembly and disassembly cycle. Furthermore, the support spacing can be adjusted at any time according to changes in the trench width on site, ensuring that the support structure is always in close contact with the soil, thus improving construction safety and efficiency.

[0024] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

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