Post-cast strip formwork sealing structure

Abstract

This utility model discloses a formwork sealing structure for post-cast strips in construction, addressing the technical problem of insufficient construction convenience during the construction of post-cast strips in existing technologies. The two side walls of the space to be sealed have roughened surfaces and are reinforced with steel bars. The steel mesh is tied to the straight bars. The main formwork and back formwork are fixed to the walls on both sides of the space to be sealed using expansion bolts, enclosing the space to be poured. A first grouting window is set in the middle of the main formwork, and a second grouting window is set at the top. A first sealing cover plate is placed at the first grouting window, and a second sealing cover plate is placed at the second grouting window. An overflow window is set on the second sealing cover plate. After construction, this technology avoids the formation of tie bolt holes, thus solving the problem of requiring secondary waterproofing treatment at tie bolt holes in traditional construction processes. Furthermore, the construction efficiency and quality are improved through the use of this special formwork and its sealing structure.

Description

Technical Field

[0001] This utility model relates to the field of civil engineering construction technology, specifically a post-pouring strip sealing construction technology for construction sites such as basement walls. Background Technology

[0002] During basement construction, pre-reserved gaps need to be filled with concrete to form a post-pouring strip. Taking the post-pouring of basement partition walls as an example, the first step is to roughen and clean the surface of the concrete wall in the pouring area to create a rough surface for easy bonding. Then, a reinforcing cage is tied within the pouring area. After the reinforcing bars are tied, wooden formwork is erected on both sides of the post-pouring gap. Tie rods must be used during the support of the wooden formwork; that is, only through tie rods can the waterproofing performance of the post-pouring strip meet design requirements. Depending on the length and width of the post-pouring strip, multiple rows of tie rods are needed to reinforce the wooden formwork. Then, grout is injected into the internal cavity, and finally, curing and demolding are performed. For example, Chinese patent document CN117403886A discloses a formwork connector and its construction technology for post-pouring strip construction, which belongs to this type of construction technology relying on the combination of tie rods and formwork.

[0003] The technical problem with this method of using tie rods to support the formwork is that there is still a possibility of water seepage at the tie rods. Therefore, a more specialized formwork and its construction technology are needed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a formwork sealing structure for post-cast strips in construction, which solves the technical problem of insufficient construction convenience during the construction process of post-cast strips in existing technologies, especially the problem that the tie bolt holes need to be waterproofed and seepage-proofed after sealing. By using this special formwork, construction efficiency and construction quality are improved.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows:

[0006] The post-cast strip formwork sealing structure includes a main formwork and a back formwork set on both sides of the space to be sealed. The structure is characterized by having roughened surfaces and reinforcing bars on both side walls of the space to be sealed, and a reinforcing mesh tied within the sealed space, the reinforcing mesh being tied to the straight bars. The main formwork and back formwork are fixed to the walls on both sides of the space to be sealed by expansion bolts, enclosing the space to be poured. A first grouting window is set in the middle of the main formwork, and a second grouting window is set at the top. A first sealing cover plate is installed at the first grouting window, and a second sealing cover plate is installed at the second grouting window. An overflow window is set on the second sealing cover plate.

[0007] Furthermore, horizontal reinforcing ribs are respectively provided on the outer sides of the main template and the back template.

[0008] Furthermore, the first grouting window consists of side plates set along both sides and a bottom plate set along the lower edge of the window. The two side plates and the bottom plate form a funnel-shaped grouting port, and the lowest point of the bottom plate is higher than the lower edge of the first grouting window, forming an insertion groove between the bottom plate and the wall.

[0009] Furthermore, the upper edge of the first sealing cover plate is provided with a Z-shaped bend, which is bolted to the main template, and the lower end of the first sealing cover plate is inserted into the insertion groove.

[0010] Furthermore, the second grouting window consists of side plates set along both sides and a bottom plate set along the lower edge of the window. The two side plates and the bottom plate form a funnel-shaped grouting opening, and the lowest point of the bottom plate is higher than the lower edge of the second grouting window, forming an insertion groove between the bottom plate and the wall.

[0011] Furthermore, the lower edge of the second sealing cover is inserted into the insertion groove, and lateral ear plates are provided on both sides of the second sealing cover. The lateral ear plates and the second grouting window are fastened together by screws.

[0012] Furthermore, a vibration motor is fixedly installed on the outer surface of the main template and / or the back template.

[0013] Furthermore, the main template and / or back template is a steel template or an aluminum template.

[0014] The beneficial effects of this utility model are:

[0015] After construction using this technology, no tie bolt holes will be created, thus solving the problem of requiring secondary waterproofing treatment at tie bolt holes in traditional construction processes. Furthermore, the use of this specialized template and its sealing structure improves construction efficiency and quality. Attached Figure Description

[0016] Figure 1 This is a vertical sectional view of the construction structure of this utility model.

[0017] Figure 2 This is a three-dimensional view of the construction structure of this utility model.

[0018] Figure 3 A 3D representation of the main template.

[0019] Figure 4 This is a three-dimensional view of the second sealing cover.

[0020] Figure 5 This is a three-dimensional view of the first sealing cover plate.

[0021] Figure 6 This is a 3D model of the back template.

[0022] Figure 7 This is a display image before the barrier is sealed off.

[0023] In the picture:

[0024] 100 Main formwork, 110 First grouting window, 120 Second grouting window, 130 First sealing cover plate, 131 Bending section, 140 Second sealing cover plate, 141 Side ear plate, Overflow window 142.

[0025] 200 back template,

[0026] 300 expansion bolt assembly,

[0027] 400 vibration motor,

[0028] 00 Wall, 01 Space to be sealed, 02 Steel mesh, 03 Rebar installation. Detailed Implementation

[0029] refer to Figure 7 During the construction of basements, air-raid shelters, and other similar structures, it is necessary to seal off pre-reserved narrow gaps, windows, and doorways due to structural construction and modification requirements. The conventional method is to seal them with reinforced concrete, which requires a relatively high level of waterproofing. Current construction techniques utilize a combination of formwork and tie rods for waterproofing. The advantages and disadvantages of this technique have been described in the background section and will not be repeated here.

[0030] refer to Figures 1 to 6 This embodiment introduces a formwork for sealing post-cast strips in buildings. The formwork is made of steel or aluminum and includes a main formwork 100 and a back formwork 200. The main formwork 100 is made of steel plate and has square steel pipes welded to its back to form reinforcing ribs on the back side. These reinforcing ribs are spaced 40 cm apart, and the welded square steel pipes are horizontally positioned.

[0031] Bolt holes, each φ10mm in diameter, are provided on both sides of the main formwork 100. The formwork is secured to the wall 00 using expansion bolt assemblies 300 through these bolt holes. This fixing method eliminates the need for tie bolts, thus reducing the risk of water seepage associated with tie bolt installation.

[0032] Generally, the main formwork and back formwork are set to the same height as the basement wall. If adjustments are needed, they are cut from the bottom edge of the formwork. A first grouting window 110 is set in the middle of the main formwork 100. The first grouting window is a square window. Two side plates are set on both sides of the first grouting window 110, and an inclined bottom plate is set on the bottom edge. A funnel-shaped grouting inlet is formed by the side plates and the bottom plate, and the lowest point of the bottom plate is higher than the bottom edge of the first grouting window. An insertion groove is formed between the bottom plate and the wall to be fixed. Correspondingly, a sealing cover plate is also provided at the first grouting window. For ease of description, this cover plate is marked as the first sealing cover plate 130. The first sealing cover plate is a rectangular steel plate or aluminum plate. A Z-shaped bend is set on the upper edge of the first sealing cover plate 130. The bending dimension of the bend 131 is equal to the thickness of the steel plate of the formwork. A round hole is provided at the aforementioned bend, and two threaded holes are provided at the corresponding position of the first grouting window. The sealing process is as follows: the lower edge of the first sealing cover plate 130 is inserted into the aforementioned insertion groove, and the first sealing cover plate is fixed to the template body through bolt holes, threaded holes and high-strength screws to form a seal for the first grouting window.

[0033] A second grouting window 120 is provided at the top of the main template body. This second grouting window is an open, square opening. A funnel-shaped grout inlet, consisting of a side plate and a bottom plate, is provided at the second grouting window 120. The lowest point of the bottom plate is higher than the lower edge of the second grouting window, forming an insertion groove between the bottom plate and the wall to be fixed. A corresponding second sealing cover plate 140 is also included. Two lateral ear plates 141 are provided on both sides of the second sealing cover plate, with threaded holes at these ear plates. Two round holes are also provided at corresponding positions on the side plates on both sides of the second grouting window. The sealing process is as follows: the lower edge of the second sealing cover plate is inserted into the insertion groove, and the second sealing cover plate is fixed using bolt holes, threaded holes, and high-strength screws to seal the second grouting window. An overflow window 142 is provided on the main body of the second sealing cover plate 140 for mortar passage.

[0034] The back formwork 200 is made of steel plate with square steel tubes welded to the back to form reinforcing ribs. These reinforcing ribs are spaced 40 cm apart, and the welded square steel tubes are horizontally positioned. Bolt holes, which are elongated holes with a diameter of φ10 mm, are provided on both sides of the back formwork. The back formwork is fixed to the wall using expansion bolt assemblies.

[0035] Furthermore, a miniature vibration motor 400 is fixedly installed on the outer surface of the main template and the back template. The vibration motor makes the grouting dense during the construction process through vibration.

[0036] The construction process for this structure is as follows: Before construction, the side walls of the reserved narrow gaps, windows, and doorways to be sealed (space 01) are roughened, and rebar is installed on the side walls of these spaces. The outer length of the rebar (03) is reserved to be no less than 5 cm. After the rebar installation, the space to be sealed is cleaned to create a clean surface suitable for grouting. Then, the vertical rebar and horizontal rebar mesh (rebar cage) are tied within this space. After tying, expansion bolts are used to fix the main formwork and back formwork on both sides of the space to be poured. After the main formwork and back formwork are fixed, concrete mortar is poured into the space through the first grouting window, and the vibrating motor (100) is turned on for auxiliary vibration to prevent internal voids. Once the grouting reaches the first grouting window, seal it with the first sealing cover plate. Then, grouting begins from the second grouting window above, with a vibrating motor used for auxiliary compaction until the second grouting window is filled with mortar. The grouting groove outside the second grouting window is also filled with mortar and sealed with the second sealing cover plate. Because this second sealing cover plate has an overflow window, grout is present on both the inner and outer sides of the sealing cover plate, allowing for slight replenishment of the internal material. After grouting is complete, vibration is stopped, and the mortar is allowed to cure for 24 hours before demolding. After removing the main formwork and back formwork, the second sealing cover plate is finally removed. Any remaining areas around the overflow window are then repaired, completing the construction of this structure.

[0037] This technology creates a prefabricated sealing structure that eliminates the need for tie bolt holes and offers a higher level of waterproofing.

[0038] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Without departing from the spirit of the present utility model, all modifications and improvements to the present utility model by those skilled in the art should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A formwork sealing structure for post-cast strips in buildings, comprising main formwork and back formwork set on both sides of the space to be sealed, characterized in that, The two side walls of the space to be sealed have roughened surfaces and are reinforced with steel bars. A steel mesh is tied within the space to be sealed, and the steel mesh is tied to the straight bars. The main formwork and the back formwork are fixed to the walls on both sides of the space to be sealed by expansion bolts, and enclose the space to be poured. A first grouting window is set in the middle of the main formwork, and a second grouting window is set at the top. A first sealing cover plate is set at the first grouting window, and a second sealing cover plate is set at the second grouting window. An overflow window is set on the second sealing cover plate.

2. The formwork sealing structure for post-cast strips in buildings according to claim 1, characterized in that, The outer sides of the main template and the back template are respectively provided with horizontal reinforcing ribs.

3. The formwork sealing structure for post-cast strips in buildings according to claim 1, characterized in that, The first grouting window consists of side plates set along both sides and a bottom plate set along the lower edge of the window. The two side plates and the bottom plate form a funnel-shaped grouting opening, and the lowest point of the bottom plate is higher than the lower edge of the first grouting window, forming an insertion groove between the bottom plate and the wall.

4. The formwork sealing structure for post-cast strips in buildings according to claim 3, characterized in that, The upper edge of the first sealing cover plate is provided with a Z-shaped bend, which is bolted to the main template, and the lower end of the first sealing cover plate is inserted into the insertion groove.

5. The formwork sealing structure for post-cast strips in buildings according to claim 1, characterized in that, The second grouting window consists of side plates set along both sides and a bottom plate set along the lower edge of the window. The two side plates and the bottom plate form a funnel-shaped grouting opening, and the lowest point of the bottom plate is higher than the lower edge of the second grouting window, forming an insertion groove between the bottom plate and the wall.

6. The formwork sealing structure for post-cast strips in buildings according to claim 5, characterized in that, The lower edge of the second sealing cover is inserted into the insertion groove, and lateral ear plates are provided on both sides of the second sealing cover. The lateral ear plates and the second grouting window are fastened together by screws.

7. The formwork sealing structure for post-cast strips in buildings according to claim 1, characterized in that, A vibration motor is fixedly installed on the outer surface of the main template and / or back template.

8. The formwork sealing structure for post-cast strips in buildings according to claim 1, characterized in that, The main template and / or back template are made of steel or aluminum.

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