Underground passage wall unilateral formwork setting fixture
A formwork system with adjustable connections and precise alignment addresses the instability issues in single-sided tunnel construction, improving quality and efficiency.
Patent Information
- Application Number
- CN202422292727.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-20
AI Technical Summary
In the construction of underground passages, the single-side formwork support and reinforcement are not firmly likely to cause problems such as expansion molds and leakage of slurry. Especially when the pile position error of the water stop curtain and there are extruded polystyrene plates on the outside of the pile body, the conventional support rods are unstable, resulting in unstable mold frame system.
The single-sided support molding clamp of the underground passage wall is adopted, including pile body, exterior wall formwork, planting ribs, positioning ribs, underground passage wall reinforcement and pulling screws. It is connected to the transplanting ribs through a straight thread sleeve. The positioning ribs are welded with the pulling screws, and the support keel and positioning steel plate are combined to ensure the accurate positioning of the template and the verticality of the template.
The precise positioning of the formwork is achieved, the wall section and perpendicularity is ensured, the mold expansion phenomenon is avoided, the construction quality and progress are improved, and the cost is saved.
Smart Images
Figure CN223104119U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of municipal engineering construction, and particularly relates to a one-sided formwork fixing clamp for the wall of an underground passage. Background Technique
[0002] With the rapid development of urban construction, there are more and more urban upgrading projects. Newly built buildings are close to existing buildings, the distance between the outer wall of the underground passage and the foundation pit support structure is getting smaller and smaller, and the technical research on one-sided formwork is becoming more and more important.
[0003] At present, on one side of some newly built underground passages, there is a water-stop curtain pile of SMW construction method with an external thermal insulation layer pasted on it, and on the other side, there is a formwork support of multi-layer boards. During the actual construction process, there are often large errors in the pile positions during the construction of the water-stop curtain pile, and there is an extruded polystyrene board on the outside of the pile body as an inner formwork. The conventional construction method is to use a strut to ensure the cross-sectional dimension of the wall. The strut is not firmly fixed and penetrates the thermal insulation layer, and it is easy to displace during the concrete pouring, resulting in instability of the formwork system and phenomena such as formwork bulging of the concrete. Summary of the Invention
[0004] The purpose of the utility model is to solve the problems of unstable reinforcement of one-sided formwork support and easy formwork bulging and slurry leakage in the above-mentioned existing technologies, and provide a one-sided formwork fixing clamp for the wall of an underground passage.
[0005] The utility model is realized by the following technical solutions:
[0006] A one-sided formwork fixing clamp for the wall of an underground passage includes a pile body, an outer wall formwork, implanted steel bars, positioning steel bars, underground passage wall steel bars and tie bolts; a cement foamed concrete layer is connected to the outside of the pile body, and an extruded polystyrene board is connected to the outside of the cement foamed concrete layer; the outer wall formwork is located outside the extruded polystyrene board, the implanted steel bars penetrate through the extruded polystyrene board and the cement foamed concrete layer and then extend and are fixed into the pile body, the positioning steel bars are located between the extruded polystyrene board and the outer wall formwork, one end of the positioning steel bar is movably connected to the outer end of the implanted steel bar through a straight thread sleeve, and the other end of the positioning steel bar is fixedly connected to one end of the tie bolt by welding; the underground passage wall steel bars are located below the positioning steel bars and are fixedly connected to the positioning steel bars; the tie bolt penetrates and supports on the outer wall formwork, a positioning steel plate and a supporting keel are connected to the tie bolt, the positioning steel plate supports and fixes on one side of the outer wall formwork, the supporting keel supports and fixes on the other side of the outer wall formwork, and the outer wall formwork is clamped between the positioning steel plate and the supporting keel.
[0007] Furthermore, a PVC waterproof board is arranged on the outside of the extruded polystyrene board, and the implanted steel bars penetrate through the PVC waterproof board.
[0008] Furthermore, the positioning steel plate is fixedly welded on the tie bolt.
[0009] Further, the supporting keels include main formwork keels, secondary formwork keels and U-shaped clamps. The main formwork keels are clamped on the external wall formwork, the secondary formwork keels are clamped on the main formwork keels, and the U-shaped clamps are clamped on the secondary formwork keels. Fixed nuts are threadedly connected to the tension bolts, and the fixed nuts lock and fix the main formwork keels, secondary formwork keels and U-shaped clamps.
[0010] Further, both the post-inserted bars and the positioning bars are made of Φ16 steel bars.
[0011] Further, wall positioning bars are fixed on both sides of the steel bars of the underground passage wall.
[0012] Further, a water stop ring is provided on the post-inserted bar, and the water stop ring is fixedly installed close to the outer side of the PVC waterproof board.
[0013] The present utility model is a special-shaped fixing fixture proposed in view of the difficulties in formwork positioning, steel bar positioning, waterproof requirements, etc. of the single-sided formwork support for the underground passage. The positioning bars are first connected to the post-inserted bars of the pile body through straight thread sleeves and then welded and fixed to the tension bolts. On the one hand, the straight thread sleeves can realize the adjustable position of the positioning bars, and on the other hand, the length of each tension bolt is determined through positioning measurement, so that the precise position of the positioning bars can be realized, ensuring the wall section and perpendicularity. It can not only ensure the quality, speed up the progress, but also save costs. The present utility model provides a reference for future similar projects, having important theoretical significance and engineering application value. At the same time, it can improve the construction technology level of the enterprise in single-sided formwork support, enhance the competitiveness of the enterprise in undertaking similar projects, and bring greater follow-up benefits to the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The drawings here are used to provide further illustration of the present utility model, constituting a part of this application. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model.
[0015] Figure 1 It is a schematic plan structure diagram of the fixing fixture of the present utility model.
[0016] In the figure: 1 - pile body, 2 - external wall formwork, 3 - post-inserted bar, 4 - positioning bar, 5 - steel bars of the underground passage wall, 6 - wall positioning bar, 7 - tension bolt, 8 - cement foamed concrete layer, 9 - extruded polystyrene board, 10 - PVC waterproof board, 11 - water stop ring, 12 - straight thread sleeve, 13 - positioning steel plate, 14 - main formwork keel, 15 - secondary formwork keel, 16 - U-shaped clamp, 17 - fixed nut. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0017] To enable those skilled in the art to better understand the present utility model, the following further clearly and completely describes the present utility model in conjunction with the reference drawings and embodiments. It should be noted that, without conflict, the implementation manners and features in the embodiments of the present application can be combined with each other.
[0018] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "inner", "outer", "lower", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.
[0019] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "setting", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0020] Such as Figure 1As shown in the figure, this embodiment provides a single-sided formwork fixing clamp for the underground passage wall, which includes a pile body 1, an external wall formwork 2, implanted steel bars 3, positioning steel bars 4, underground passage wall steel bars 5, and tie bolts 7. A foamed cement concrete layer 8 is arranged on the outer side of the pile body 1, an extruded polystyrene board 9 is arranged on the outer side of the foamed cement concrete layer 8, and a PVC waterproof board 10 is arranged on the outer side of the extruded polystyrene board 9. The external wall formwork 2 is located on the outer side of the PVC waterproof board 10. The implanted steel bars 3 penetrate through the PVC waterproof board 10, the extruded polystyrene board 9, and the foamed cement concrete layer 8 and then extend and are fixed into the pile body 1. A water stop ring 11 is arranged on the implanted steel bars 3, and the water stop ring 11 is fixedly installed closely against the outer side of the PVC waterproof board 10. The implanted steel bars 3 are made of Φ16 steel bars. The positioning steel bars 4 are located between the extruded polystyrene board 9 and the external wall formwork 2. One end of the positioning steel bars 4 is movably connected to the outer end of the implanted steel bars 3 through a straight thread sleeve 12, and the other end of the positioning steel bars 4 is fixedly connected to one end of the tie bolts 7 through welding. The positioning steel bars 4 are made of Φ16 steel bars. The underground passage wall steel bars 5 are located below the positioning steel bars 4 and are fixedly connected to the positioning steel bars 4. Wall positioning steel bars 6 are fixed on both sides of the underground passage wall steel bars 5. The tie bolts 7 penetrate and support on the external wall formwork 2. A positioning steel plate 13 and a support keel are connected to the tie bolts 7. The positioning steel plate 13 is supported and fixed on one side of the external wall formwork 2, and the support keel is supported and fixed on the other side of the external wall formwork 2. The external wall formwork 2 is clamped between the positioning steel plate 13 and the support keel. Among them, the positioning steel plate 13 is fixedly welded on the tie bolts 7. The support keel includes a formwork main keel 14, a formwork secondary keel 15, and a U-shaped clamp 16. The formwork main keel 14 is clamped on the external wall formwork 2, the formwork secondary keel 15 is clamped on the formwork main keel 14, the U-shaped clamp 16 is clamped on the formwork secondary keel 15, and a fixing nut 17 is threadedly connected to the tie bolts 7. The fixing nut 17 locks and fixes the formwork main keel 14, the formwork secondary keel 15, and the U-shaped clamp 16.
[0021] The construction method of the single-sided formwork fixing clamp for the underground passage wall described in this embodiment mainly includes the following steps:
[0022] 1) Locate the position of the underground passage wall by measuring and setting out, locate the position of the reinforcement points according to the position in the formwork reinforcement drawing, measure the distance between the reinforcement points and the pile body 1, and process the implanted steel bars 3.
[0023] 2) Process the single-sided formwork fixing clamp for the underground passage wall described in this embodiment. The main components are shown in Figure 1.
[0024] 3) According to the position of the formwork reinforcement points, fix the Φ16 steel bar-made implanted steel bars 3 to the pile body 1 in the form of pile body implanted steel bars, then construct the foamed cement concrete layer 8, the extruded polystyrene board 9, and the PVC waterproof board 10, and install a water stop ring 11 at the position where the implanted steel bars 3 penetrate through the PVC waterproof board 10. The water stop ring 11 is a water-swelling water stop ring.
[0025] 4) Connect the positioning bars 4 in the middle section and the post-inserted bars 3 through the straight thread sleeves 12, then weld and fix the positioning bars 4 and the tension tie bolts 7. Weld the positioning steel plates 13 on the tension tie bolts 7, and install the external wall formwork 2 and the support keels. Finally, the formwork reinforcement system can be formed.
[0026] The above embodiments only represent several implementation manners of the present utility model, and the description thereof is relatively specific and detailed. However, it should not be construed as a limitation to the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several variations and improvements can still be made, and these all belong to the protection scope of the present utility model.
Claims
1. A one-sided formwork fixed fixture for the wall of an underground passage, comprising a pile body, a foamed cement concrete layer is connected to the outer side of the pile body, and an extruded polystyrene board is connected to the outer side of the foamed cement concrete layer; characterized in that: It also includes an exterior wall formwork, post-inserted bars, positioning bars, underground passage wall steel bars and tie bolts; the exterior wall formwork is located on the outer side of the extruded polystyrene board, the post-inserted bars penetrate through the extruded polystyrene board and the cement foamed concrete layer and then extend and are fixed into the pile body, the positioning bars are located between the extruded polystyrene board and the exterior wall formwork, one end of the positioning bar is movably connected to the outer end of the post-inserted bar through a straight thread sleeve, and the other end of the positioning bar is fixedly connected to one end of the tie bolt by welding; the underground passage wall steel bars are located below the positioning bars and are fixedly connected to the positioning bars; the tie bolt penetrates and supports on the exterior wall formwork, and a positioning steel plate and a support keel are connected to the tie bolt, the positioning steel plate is supported and fixed on one side of the exterior wall formwork, the support keel is supported and fixed on the other side of the exterior wall formwork, and the exterior wall formwork is clamped between the positioning steel plate and the support keel.
2. The one-sided formwork fixing fixture for the underground passage wall according to claim 1, wherein: A PVC waterproof board is arranged on the outer side of the extruded polystyrene board, and the post-inserted bars penetrate through the PVC waterproof board.
3. The one-sided formwork fixing clamp for the underground passage wall according to claim 1, characterized in that: The positioning steel plate is welded and fixed on the tie bolt.
4. The one-sided formwork fixed fixture for the underground passage wall according to claim 1, characterized in that: The support keel includes a main formwork keel, a secondary formwork keel and a U-shaped clamp. The main formwork keel is clamped on the exterior wall formwork, the secondary formwork keel is clamped on the main formwork keel, the U-shaped clamp is clamped on the secondary formwork keel, and a fixing nut is threadedly connected to the tie bolt, and the fixing nut locks and fixes the main formwork keel, the secondary formwork keel and the U-shaped clamp.
5. The one-sided formwork fixing fixture for the underground passage wall according to claim 1, characterized in that: Both the post-inserted bars and the positioning bars are made of Φ16 steel bars.
6. The single-sided formwork fixing fixture for the underground passage wall according to claim 1, wherein: Wall positioning steel bars are fixed on both sides of the underground passage wall steel bars.
7. The single-sided formwork fixing clamp for the underground passage wall according to claim 2, characterized in that: A water stop ring is arranged on the post-inserted bar, and the water stop ring is fixedly installed close to the outer side of the PVC waterproof board.