Constructional column formwork plugging device
By setting water-stop strips and sealant layers between the structural column formwork and the masonry, the problems of grout leakage and complex construction in traditional structural column pouring are solved. This achieves a sealing effect under low temperature conditions, simplifies construction, and makes it easy to remove later, ensuring the bonding effect between the plaster mortar and the secondary structure.
Patent Information
- Application Number
- CN202520259228.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2035-02-19
AI Technical Summary
When traditional structural columns are poured, grout is prone to leakage at the contact point between the sealed formwork and the masonry. Furthermore, double-sided adhesive strips cannot be used under low temperature conditions, making construction complex and removal difficult later, which affects the bonding between the plaster mortar and the secondary structure.
A structural column formwork sealing device using water-stop strips and sealant layers is used. Water-stop strips and sealant layers are placed between the sealing formwork and the masonry, and fixed with self-tapping screws to prevent grout leakage and facilitate easy removal later.
It effectively prevents grout leakage and formwork bulging, is easy to construct, is not affected by temperature, and does not affect the bonding between plaster mortar and secondary structure after post-construction treatment.
Smart Images

Figure CN223661365U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of structural columns, and in particular relates to a structural column template sealing device. Background Technology
[0002] Structural columns are reinforced concrete columns installed in the walls of multi-story brick-concrete structures to enhance the overall integrity and stability of the building. These columns connect to the ring beams on each floor, forming a spatial frame that resists bending and shearing, thus serving as an effective measure to prevent building collapse. Structural columns are typically placed at the four corners of exterior walls, at the intersection of transverse and longitudinal walls in staggered floor sections, on both sides of large openings, and at the intersection of interior and exterior walls in large rooms.
[0003] In traditional structural column pouring, double-sided adhesive strips are typically used at the joint between the formwork and the masonry to prevent grout leakage and formwork bulging at the contact point. However, this method is unsuitable for low-temperature conditions. At excessively low temperatures, the adhesive strips fail to bond with the masonry, and applying them is complex for workers on floors with a height exceeding 3 meters. Furthermore, even at normal temperatures, the double-sided adhesive strips are difficult to remove later, which can affect the adhesion between the plaster mortar and the secondary structure. Utility Model Content
[0004] To address the existing problems in the sealing of structural column formwork during casting, this utility model provides a structural column formwork sealing device. This sealing device has a simple structure and is easy to construct. It uses a water-stop strip to seal the edge of the formwork and the masonry, is unaffected by temperature, and is easy to remove later.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a structural column template sealing device, including two sealing templates, which are respectively pressed on the inner and outer sides of the masonry. The middle of the sealing template is provided with threaded rod holes at intervals. The tie rod passes through the threaded rod holes to press the sealing templates on both sides onto the masonry. A water-stop strip is provided between the sealing template on each side and the masonry. Multiple self-tapping screws are provided at intervals on the sealing template at the water-stop strip. The automatic screws fix the sealing template, the water-stop strip and the masonry.
[0006] Furthermore, each of the waterproofing strips has a sealing layer on both sides.
[0007] Furthermore, the width of the waterproofing strip is 90-150mm and the thickness is 2-3mm.
[0008] Furthermore, the water-stop strip is installed at the edge of the masonry, with a portion of the water-stop strip overlapping the masonry and the other portion located at the position of the structural column.
[0009] Furthermore, the sealing template is made of bamboo plywood or wood.
[0010] Compared with the prior art, the advantages of this utility model are as follows: This utility model solves the problem of grout leakage and formwork bulging by setting a water-stop strip and a sealant layer between the sealing template and the masonry. The water-stop strip is fixed by self-tapping screws, which is not affected by external temperature. Moreover, during post-processing, both the sealant layer and the water-stop strip can be removed quickly compared to double-sided adhesive layers, without affecting the adhesion between the plaster mortar and the secondary structure. Attached Figure Description
[0011] The present invention will be further described below with reference to the accompanying drawings.
[0012] Figure 1 This is a schematic diagram of the structure of this utility model.
[0013] Figure 2 for Figure 1 Enlarged view of a portion of point A in the middle.
[0014] In the diagram, 1 is the sealing template, 2 is the structural column, 3 is the tie rod, 4 is the water-stopping strip, 5 is the sealing layer, 6 is the self-tapping screw, and 7 is the masonry. Detailed Implementation
[0015] like Figures 1-2 As shown, the structural column formwork sealing device includes two sealing templates 1. The sealing templates 1 can be made of bamboo plywood or wood. Both bamboo plywood and wood are commonly used materials on construction sites and are relatively inexpensive. They also facilitate the subsequent tightening of self-tapping screws 6.
[0016] The sealing templates 1 are pressed onto the inner and outer sides of the masonry 7, respectively, and the two sealing templates 1 and the masonry 7 form the pouring space for the structural column 2. Threaded rod holes are provided at intervals in the middle of the sealing templates 1, and tie rods 3 pass through the threaded rod holes to press the sealing templates 1 on both sides onto the masonry 7.
[0017] Water-stop strips 4 are installed between both sealing templates 1 and the masonry 7. The water-stop strips 4 are installed along the entire length of the structural column 2, so that water-stop strips 4 are installed at the edges of both the sealing templates 1 and the masonry 7. The water-stop strips 4 are fixed with self-tapping screws 6.
[0018] Multiple self-tapping screws 6 are spaced apart on the sealing template 1 at the water-stop strip 4. The automatic screws fix the sealing template 1, the water-stop strip 4 and the masonry 7.
[0019] A sealant layer 5 is provided on both sides of each waterstop strip 4. The sealant layer 5 and the waterstop strip 4 are used to solve the problem of grout leakage on the sides. After the pouring is completed, the waterstop strip 4 and the sealant layer 5 can be quickly removed without sticking to the masonry 7 and affecting the bonding between the mortar and the secondary structure.
[0020] In practical use, the width of the water-stop strip 4 is generally 90-150mm, and the thickness is 2-3mm. The water-stop strip 4 is placed at the edge of the masonry 7, with part of the strip overlapping the masonry 7 and the other part located at the position of the structural column 2. This effectively prevents mortar from entering the gap between the sealing template 1 and the masonry 7.
[0021] This utility model utilizes a water-stopping strip 4 and a sealing layer 5 to control grout leakage and formwork expansion at the contact point between the masonry 7 and the structural column 2 during concrete pouring. The subsequent removal is simple and does not affect the bonding between the plaster mortar and the secondary structure.
[0022] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.
Claims
1. A structural column formwork sealing device, characterized in that: It includes two sealing templates (1), which are pressed on the inner and outer sides of the masonry (7) respectively. The middle part of the sealing template (1) is provided with screw holes. The tie rod (3) passes through the screw holes to press the two sealing templates (1) on the masonry (7). A water-stop strip (4) is provided between the sealing template (1) on each side and the masonry (7). Multiple self-tapping screws (6) are provided at intervals on the sealing template (1) at the water-stop strip (4). The automatic screws fix the sealing template (1), water-stop strip (4) and masonry (7) to each other.
2. The structural column formwork sealing device according to claim 1, characterized in that: Each of the water-stopping strips (4) has a sealing layer (5) on both sides.
3. The structural column formwork sealing device according to claim 2, characterized in that: The width of the water-stopping strip (4) is 90-150mm and the thickness is 2-3mm.
4. The structural column formwork sealing device according to claim 3, characterized in that: The water-stop strip (4) is set at the edge of the masonry (7), with one part of the water-stop strip (4) overlapping the masonry (7) and the other part located at the position of the structural column (2).
5. The structural column formwork sealing device according to claim 1, characterized in that: The sealing template (1) is made of bamboo plywood or wood template.