Bottom die mounting structure for integral joint of prefabricated laminated slab

Abstract

The utility model discloses a bottom die installation structure for an integral joint of a prefabricated laminated slab. The bottom die installation structure comprises a supporting rod and a hanging assembly. The two ends of each supporting rod are installed on the erecting ribs of the two adjacent laminated slabs respectively. The top of the hanging assembly is perpendicularly and fixedly connected to the middle of the supporting rod, and the bottom of the hanging assembly is connected with the bottom die. The hanging assembly comprises a hanging rod, a plug and a water stop piece, the hanging rod is sleeved with the plug, and the bottom of the plug abuts against the bottom die. The lifting rod comprises a first screw rod and a second screw rod; the first screw rod and the second screw rod are detachably connected at the end part or are butted through a bolt joint; the first screw rod is provided with the water stop piece in the radial direction, and the arrangement height of the water stop piece is larger than that of the plug. The second screw rod penetrates through a receding hole formed in the bottom die and is exposed for a certain length below the bottom die; the hanging assembly further comprises a limiting piece, and the limiting piece is arranged on the surface of the exposed section of the second screw in a sleeving mode and is in limiting fit with the bottom die in the vertical direction.

Description

Technical Field

[0001] The utility model relates to the technical field of assembled building construction, in particular to a bottom mold installation structure of an integral joint of a prefabricated composite plate. Background Art

[0002] In prefabricated construction projects, after the prefabricated composite panels are laid and installed, the joints between the composite panels need to be cast as a whole. In the actual construction process, steel wire ropes are usually used to hang the bottom formwork at the joints for subsequent concrete pouring. This method of hanging formwork often leads to poor waterproof performance at the joints of the composite panels, which is prone to water seepage during subsequent use.

[0003] Chinese patent CN206784913U discloses a two-stage composite plate joint hanging formwork tool, which improves the hanging formwork process by setting up a tension screw on the top of the composite plate and passing it down to the bottom of the bottom formwork, and fixing the bottom formwork to the bottom of the composite plate with the help of a limiter, thereby improving the construction quality of the post-cast concrete at the composite plate joint to a certain extent. However, this technical solution still has shortcomings: the lack of longitudinal water-stop components affects the waterproof performance of the post-cast concrete; the support rod is directly set up on the surface of the composite plate, which not only affects the bonding performance between the post-cast concrete and the composite plate, but also the vertical space between the support rod and the bottom formwork is narrow, which makes it difficult to install components such as connecting wire heads and plugs, as well as the vibration and filling processes of the concrete, thereby affecting the molding quality of the post-cast concrete. Utility Model Content

[0004] The main technical problem to be solved by the utility model is to provide a bottom mold installation structure for the integral joints of prefabricated composite panels in view of the shortcomings of the existing technology, so as to improve the waterproof performance and molding quality of the post-poured concrete and further improve the construction quality of the integral joints of the composite panels.

[0005] In order to solve the above technical problems, the utility model provides a bottom mold installation structure for an integral joint of a prefabricated composite plate, comprising a support rod and a hanging assembly; the two ends of the support rod are respectively installed on the frame reinforcements of two adjacent composite plates; the top of the hanging assembly is vertically fixed to the middle of the support rod, and the bottom is connected to the bottom mold;

[0006] The hanging assembly includes a hanging rod, a plug and a water stop plate; the plug is sleeved on the hanging rod, and the bottom thereof abuts against the bottom mold; the hanging rod is radially provided with the water stop plate, and the setting height of the water stop plate is higher than the plug.

[0007] In a preferred embodiment, the end of the support rod and the reinforcement bar can be fixed by binding or welding.

[0008] In a preferred embodiment, the suspension rod includes a first screw rod, a second screw rod and a threaded joint; the top end of the first screw rod is vertically fixed to the support rod, and the bottom end is connected to the top of the second screw rod through the threaded joint, and the connection position is higher than the bottom mold; the second screw rod passes through a clearance hole set on the bottom mold and is exposed for a certain length below the bottom mold.

[0009] In a preferred embodiment, the suspension rod includes a first screw rod and a second screw rod; the top end of the first screw rod is vertically fixed to the support rod, and the bottom end is detachably connected to the second screw rod, and the connection position is higher than the bottom mold; the second screw rod passes through a clearance hole set on the bottom mold, and is exposed for a certain length below the bottom mold.

[0010] In a preferred embodiment, the hanging assembly further includes a limiting member, which is sleeved on an exposed section of the surface of the second screw rod and cooperates with the bottom mold in a limiting manner in the vertical direction.

[0011] In a preferred embodiment, the limiting member is a threaded sleeve.

[0012] In a preferred embodiment, the top of the plug abuts against the bottom of the threaded joint.

[0013] In a preferred embodiment, the top of the plug is sleeved on the outer circumference of the threaded joint.

[0014] In a preferred embodiment, a circle of retaining ring is radially provided on the outer circumference of the second screw, and the top of the plug abuts against the retaining ring.

[0015] In a preferred embodiment, the plug is a plastic cone, which is narrow at the top and wide at the bottom.

[0016] Compared with the prior art, the technical solution of the utility model has the following beneficial effects:

[0017] The bottom formwork installation structure provided by the utility model is provided with a longitudinal water stop sheet, which can block the penetration of water along the joint surface between the bottom formwork installation structure and the post-cast concrete, thereby improving the waterproof performance of the post-cast concrete;

[0018] The support rods of the bottom mold mounting structure provided by the utility model are mounted on the frame bars above the composite plate, which not only provides sufficient operating space for the installation of the water stop plates, plugs and threaded joints and the vibration and filling of concrete, but also ensures the integrity of the joint surface between the post-cast concrete and the composite plate, thereby improving the molding quality of the post-cast concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a cross-sectional view of the bottom mold installation structure described in Example 1;

[0020] Figure 2This is a schematic diagram of the connection relationship between the first screw, the second screw and the plastic cone in Example 2;

[0021] Figure 3 Schematic diagram of the connection relationship between the plastic cone and the threaded joint described in Example 3.

[0022] Markings in the figure are: 1-support rod, 2-first screw, 3-second screw, 4-water stop plate, 5-threaded joint, 6-plastic cone, 7-threaded sleeve, 8-composite plate, 9-staff reinforcement, 10-bottom mold, 11-post-poured concrete; 2-1 is a clamping ring, and 10-1 is a clearance hole. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0024] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "installed / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0026] Example 1

[0027] like Figure 1As shown, this embodiment provides a bottom mold installation structure for an integral joint of a prefabricated composite plate, comprising a support rod 1, a first screw rod 2, a second screw rod 3, a water stop plate 4, a threaded joint 5, a plastic cone 6 and a threaded sleeve 7. The installation structure is a two-stage structure, wherein the support rod 1, the first screw rod 2, the water stop plate 4 and the threaded joint 5 constitute the upper part, which is permanently left in the post-cast concrete 11 after the construction is completed; the second screw rod 3, the threaded sleeve 7 and the plastic cone 6 are movable parts, which can be disassembled in the demoulding stage for turnover use.

[0028] In this preferred embodiment, in order to achieve a better bonding effect with the post-cast concrete 11, the support rod 1 uses a section of ribbed steel bar. The two ends of the support rod 1 are respectively placed on the frame bars 9 of two adjacent composite plates 8. In order to prevent the end of the support rod 1 from being separated from the frame bars 9 during the pouring and vibration of the post-cast concrete 11, the support rod 1 can be fixed to the frame bars 9 by tying or welding.

[0029] The first screw rod 2 is connected to the middle of the support rod 1, together forming a T-shaped structure. The first screw rod 2 is vertically arranged, the top is vertically welded to the bottom of the support rod 1, and the bottom extends downward to the bottom area of ​​the joint between the two superimposed plates 8, and is connected to the threaded joint 5. The threaded joint 5 is arranged above the bottom mold 10, the upper part is sleeved on the bottom of the first screw rod 2, and the lower part is sleeved on the top of the second screw rod 3, so that the first screw rod 2 and the second screw rod 3 can be connected together. A clearance hole 10-1 is arranged on the bottom mold 10 corresponding to the position of the vertical projection of the second screw rod 3, and the diameter of the clearance hole 10-1 is larger than the diameter of the second screw rod 3 and smaller than the outer diameter of the threaded sleeve 7. The second screw rod 3 passes through the clearance hole 10-1 and is exposed for a certain length below the bottom mold 10.

[0030] In the prefabricated composite slab integral joint project, the built-in bottom formwork installation structure is not completely tightly fitted with the post-cast concrete 11, which has a certain impact on the waterproof performance of the post-cast component. Therefore, in this embodiment, the water stop plate 4 is radially welded on the outer periphery of the first screw 2 to prevent moisture from penetrating along the surface of the first screw 2 to improve the waterproof performance of the component. In order to achieve a better waterproof effect, the water stop plate 4 is welded through the first screw 2, that is, there is no gap between the water stop plate 4 and the first screw 2.

[0031] like Figure 1As shown, the plastic cone 6 is arranged between the threaded joint 5 and the bottom mold 10. The inner diameter of the top of the plastic cone 6 is smaller than the outer diameter of the threaded joint 5, so that it can abut against the bottom of the threaded joint 5; the inner diameter of the plastic cone 6 is larger than the diameter of the second screw 3, ensuring that the second screw 3 can pass through the plastic cone 6 and connect with the threaded joint 5. During installation, the threaded joint 5 is rotated to squeeze the plastic cone 6 downward so that the bottom of the plastic cone 6 is tightly attached to the upper surface of the bottom mold 10. The plastic cone 6 is narrow at the top and wide at the bottom, which can not only form a closed contact surface when connected with adjacent components, thereby improving the waterproof effect, but also can be removed from the surface of the post-cast concrete 11 during the demolding stage for turnover use.

[0032] After the bottom mold 10 is sleeved on the second screw rod 3 through the clearance hole 10-1, the threaded sleeve 7 is provided on a section of the second screw rod 3 exposed below the bottom mold 10. The threaded sleeve 7 can move vertically or stay at any height through the spiral cooperation with the second screw rod 3. During installation, the threaded sleeve 7 is rotated in a certain direction to make it move upward together with the bottom mold 10. When the bottom mold 10 abuts against the bottom of the composite plate 8, the threaded sleeve 7 and the bottom mold 10 cannot continue to move upward. Then continue to rotate the threaded sleeve 7 in the same direction, so that the second screw rod 3 and the support rod 1 can have a vertical downward deflection. When this vertical deflection reaches the limit, the threaded sleeve 7 cannot continue to rotate in the same direction, and the bottom mold 10 can be supported and fixed at the bottom of the composite plate 8.

[0033] The technical solution of this embodiment is further described below in conjunction with the installation and disassembly processes of the structure. During installation, the two ends of the support rod 1 are respectively placed on the ribs 9 of the two adjacent composite plates 8, and the support rod 1 is adjusted left and right so that the first screw 2 is in the center of the joint to be cast; then the support rod 1 is fixed to the ribs 9 by tying or welding. The top of the second screw 3 and the bottom of the first screw 2 are butt-jointed together through the threaded joint 5. A clearance hole 10-1 is drilled on the bottom mold 10 at a position corresponding to the vertical projection of the second screw 3. The plastic cone 6, the bottom mold 10 and the threaded sleeve 7 are inserted from the bottom of the second screw 3 in sequence. The threaded sleeve 7 is rotated to fix the bottom mold 10 to the bottom of the composite plate 8. Adjust the plastic cone 6 so that its top is aligned with the bottom of the threaded joint 5, then rotate the threaded joint 5 to squeeze the plastic cone 6 downward so that the bottom of the plastic cone 6 is in close contact with the upper surface of the bottom mold 10, and the installation work is completed. After the post-cast concrete 11 is poured and reaches the strength, loosen the threaded sleeve 7 and remove it from the second screw rod 3, and then remove the bottom mold 10. Then rotate the second screw rod 3 in the opposite direction until it is separated from the threaded joint 5, and finally remove the plastic cone 6 from the surface of the post-cast concrete 11 to complete the disassembly work.

[0034] In construction projects, the thickness of most precast concrete composite panels is 60 mm, and the height of the plastic cone 6 and the threaded joint 5 is usually 20 to 40 mm. In order to achieve a better waterproof effect, the concrete 11 needs to tightly wrap the water stop plate 4, which requires that a certain amount of space be reserved on the upper and lower sides of the water stop plate 4 to facilitate the vibration and filling of the post-cast concrete 11. Therefore, in this embodiment, the support rod 1 is installed on the reinforcement 9 above the composite panel 8, which can provide sufficient space for the installation of the plastic cone 6, the threaded joint 5, the water stop plate 4 and the vibration and filling of the post-cast concrete 11. Secondly, compared with setting the support rod 1 on the upper surface of the composite panel 8, in this embodiment, the support rod 1 is buried in the post-cast concrete 11, which can ensure the integrity of the joint surface between the post-cast concrete 11 and the composite panel 8, thereby improving the construction quality.

[0035] Example 2

[0036] The difference between this embodiment and embodiment 1 is that: Figure 2As shown, in this embodiment, a section of inner thread groove is provided at the bottom of the first screw rod 2, and a thread section is provided at the top of the second screw rod 3, and the diameter of the thread section is equal to the inner thread groove. In this way, the first screw rod 2 and the second screw rod 3 can be docked without the aid of the threaded joint 5, and can also be disassembled and separated after the construction is completed. At the same time, a circle of clamping ring 2-1 is radially welded on the outer periphery of the first screw rod 2. The top of the plastic cone 6 abuts against the clamping ring 20-1, and is limitedly matched with the clamping ring 2-1 in the vertical direction.

[0037] Except for the differences described above, the rest of this embodiment is the same as Embodiment 1.

[0038] Example 3

[0039] The difference between this embodiment and embodiment 1 is that: Figure 3 As shown, in this embodiment, the top of the plastic cone 6 is sleeved on the outer circumference of the threaded joint 5, and the internal contour and size of the top of the plastic cone 6 match the outer surface of the threaded joint 5. In order to improve stability, a circle of clamping rings can also be radially arranged on the outer circumference of the threaded joint 5, and the top of the plastic cone 6 abuts against the clamping ring.

[0040] Except for the differences described above, the rest of this embodiment is the same as Embodiment 1.

[0041] The above is only a preferred specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any technician familiar with the technical field who uses this concept to make non-substantial changes to the utility model within the technical scope disclosed by the utility model shall be deemed to infringe the protection scope of the utility model.

Claims

1. A bottom mold installation structure for an integral joint of a prefabricated composite plate, characterized in that: It includes a support rod and a hanging assembly; the two ends of the support rod are respectively installed on the frame reinforcement of two adjacent laminated plates; the top of the hanging assembly is vertically fixed to the middle of the support rod, and the bottom is connected to the bottom mold; The hanging assembly includes a hanging rod, a plug and a water stop plate; the plug is sleeved on the hanging rod, and the bottom thereof abuts against the bottom mold; the hanging rod is radially provided with the water stop plate, and the setting height of the water stop plate is higher than the plug.

2. The bottom mold installation structure of the prefabricated composite plate integral joint according to claim 1 is characterized in that: The end of the support rod and the reinforcement can be fixed by binding or welding.

3. The bottom mold installation structure of the prefabricated composite plate integral joint according to claim 1 is characterized in that: The suspension rod includes a first screw rod, a second screw rod and a threaded joint; the top end of the first screw rod is vertically fixed to the support rod, and the bottom end is connected to the top of the second screw rod through the threaded joint, and the connection position is higher than the bottom mold; the second screw rod passes through a clearance hole set on the bottom mold and is exposed below the bottom mold for a certain length.

4. The bottom mold installation structure of the prefabricated composite plate integral joint according to claim 1 is characterized in that: The suspension rod includes a first screw and a second screw; the top end of the first screw is vertically fixed to the support rod, and the bottom end is detachably connected to the second screw, and the connection position is higher than the bottom mold; the second screw passes through a clearance hole set on the bottom mold and is exposed below the bottom mold for a certain length.

5. A bottom mold installation structure for an integral joint of a prefabricated laminated plate according to any one of claims 3 or 4, characterized in that: The hanging assembly also includes a limiting piece, which is sleeved on an exposed section of the surface of the second screw rod and is matched with the bottom mold in a vertical direction.

6. The bottom mold installation structure of the prefabricated composite plate integral joint according to claim 5 is characterized in that: The limiting member is a threaded sleeve.

7. The bottom mold installation structure of the prefabricated composite plate integral joint according to claim 3 is characterized in that: The top of the plug abuts against the bottom of the threaded joint.

8. The bottom mold installation structure of the prefabricated composite plate integral joint according to claim 3 is characterized in that: The top of the plug is sleeved on the outer circumference of the threaded joint.

9. The bottom mold installation structure of the prefabricated composite plate integral joint according to claim 4, characterized in that: A circle of clamping ring is radially arranged on the outer circumference of the second screw, and the top of the plug abuts against the clamping ring.

10. The bottom mold installation structure of the prefabricated composite plate integral joint according to claim 1, characterized in that: The plug is a plastic cone, which is narrow at the top and wide at the bottom.

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