Outer wall post-cast strip waterproof structure

Abstract

The utility model discloses an outer wall post-cast strip waterproof structure which comprises a prefabricated cover plate located on one side of the upstream face of a post-cast strip. The partition plate is located on one side of the downstream face of the post-cast strip; the two sides of the prefabricated cover plate and the two sides of the partition plate are erected on the two sides of the outer walls on the two sides of the post-cast strip correspondingly, the cover plate and the partition plate are fixedly connected through water stop screws, and the prefabricated cover plate, the partition plate and the outer walls on the two sides of the post-cast strip form a pouring cavity. A first waterproof layer is arranged on the contact face of the prefabricated cover plate and the outer wall. The pouring cavity is formed by the prefabricated cover plate, the partition plate and the wall body, the construction efficiency can be greatly improved through the prefabricated cover plate, the first waterproof layer is arranged between the prefabricated cover plate and the cavity, and the waterproof capacity is improved. According to the scheme, the construction efficiency can be improved, the waterproof effect is ensured, the maintenance cost is reduced, and the foundation pit safety is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of basement exterior wall construction, in particular to a precast concrete cover plate. Background Art

[0002] During the construction of underground buildings, in order to cope with the structural stresses caused by foundation settlement, temperature changes, etc., post-cast strips are often set to achieve segmented construction. As a construction technical means, the post-cast strip can effectively reduce the overall stress concentration of the structure and improve the stability and safety of the building. However, the post-cast strip area is also a weak link in the waterproof project and is prone to leakage problems.

[0003] In the prior art, the waterproof operation cannot be completed before the pouring of the post-cast strip of the basement exterior wall, and on-site pouring of the waterproof layer or temporary waterproof measures are mainly adopted. Such methods have problems such as long construction period, cumbersome operation, and poor waterproof effect. Summary of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a waterproof structure for the post-cast strip of the exterior wall with good waterproof performance, simple construction, and convenient operation.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A waterproof structure for the post-cast strip of the exterior wall, comprising:

[0007] A precast cover plate, located on one side of the post-cast strip facing the water;

[0008] A partition board, located on the back side of the post-cast strip;

[0009] Both sides of the precast cover plate and the partition board are respectively lapped on both sides of the exterior walls on both sides of the post-cast strip. The cover plate and the partition board are fixedly connected by a water-stop screw. The precast cover plate, the partition board and the exterior walls on both sides of the post-cast strip form a pouring cavity;

[0010] A first waterproof layer is provided on the contact surface between the precast cover plate and the exterior wall.

[0011] Furthermore, the precast cover plate includes a connecting plate and support plates located on both sides of the connecting plate. The first waterproof layer is provided at the connection between the support columns and the exterior wall. One end of the support plate in contact with the exterior wall is provided with a slope, and the slope is located on the side away from the pouring cavity; a second waterproof layer is provided on the side of the precast cover plate facing the water surface, and the second waterproof layer covers the precast cover plate and the slope and is bonded to the wall.

[0012] Further, a plurality of notches are provided on the slope surface, and a plurality of first fixing columns are provided on the support plate. One end of the first fixing column is located in the notch; a second fixing column is provided on the wall surface corresponding to the position of the fixing column, and the first fixing column and the second fixing column are fixedly connected in the notch.

[0013] Further, a lifting ring is provided on one side of the connecting plate facing the casting cavity, and the lifting ring is used for hoisting the precast cover plate.

[0014] Further, a cushion iron layer is provided on one side of the connecting plate facing the casting cavity.

[0015] Further, the first waterproof layer is a rubber water stop strip layer.

[0016] Further, the included angle between the slope surface and the wall is 45°.

[0017] Further, one end of the water stop screw is fixedly connected to the precast cover plate, and the other end passes through the partition plate and is fixedly connected by a fastener.

[0018] Further, the fastener is located outside the casting cavity. The fastener includes fastening pads provided on both sides of the water stop screw, and a snap ring and a nut located on the fastening pads. Tightening the nut can make the snap ring abut against the fastening pad, so that the precast cover plate and the partition plate are fixed together.

[0019] Further, a water stop sheet is provided on the water stop screw located in the casting cavity.

[0020] The beneficial effects of the present utility model are as follows:

[0021] A waterproof structure for the exterior wall post-cast strip of the present utility model forms a casting cavity through the precast cover plate, the partition plate and the wall. The use of the precast cover plate can greatly improve the construction efficiency, and a first waterproof layer is provided between the precast cover plate and the cavity to enhance the waterproof ability. Therefore, this case can improve the construction efficiency, ensure the waterproof effect, reduce the maintenance cost, and ensure the safety of the foundation pit. Description of the Drawings

[0022] The present utility model will be further described below with reference to the drawings and embodiments.

[0023] Figure 1 is a three-dimensional structure schematic diagram of the present utility model;

[0024] Figure 2 is a top view schematic diagram of the present utility model;

[0025] Figure 3 is a three-dimensional structure schematic diagram of another perspective of the present utility model;

[0026] Figure 4It is a rear view schematic diagram of the present utility model.

[0027] Among them,

[0028] 1. Prefabricated cover plate; 11. Support plate; 111. Slope; 1111. Notch; 1112. First fixing column; 12. Connecting plate; 121. Suspension ring; 122. Pad iron layer;

[0029] 2. Partition board;

[0030] 3. Waterstop screw; 31. Waterstop sheet;

[0031] 4. Exterior wall; 41. Second fixing column;

[0032] 5. Pouring cavity;

[0033] 6. First waterproof layer;

[0034] 7. Fastener; 71. Fastening pad; 72. Snap ring; 73. Nut. Specific embodiments

[0035] The concept, specific structure and technical effects of the present utility model will be clearly and completely described below in conjunction with the embodiments and the drawings, so as to fully understand the purpose, features and effects of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of protection of the present utility model. In addition, all the connection / connection relationships involved in the patent do not simply refer to the direct connection of components, but refer to the more optimal connection structure that can be formed by adding or reducing connection accessories according to the specific implementation situation. Each technical feature in the creation of the present utility model can be combined interactively without conflicting with each other.

[0036] During the construction process of the post-cast belt area of an underground building, the post-cast belt area is a weak link in the waterproof project. A waterproof structure for the post-cast belt of the exterior wall 4 of the present utility model is used to solve the problem that the waterproof operation of the current underground exterior wall 4 fails to be completed before the pouring of the post-cast belt, resulting in the need to take on-site pouring or temporary waterproof measures, which is difficult to ensure long-term waterproof effects, increases the later maintenance cost, and affects the backfilling of the foundation pit fat groove and the safety of the foundation pit.

[0037] A waterproof structure for the post-cast strip of an exterior wall 4 includes a precast cover plate 1 and a partition plate 2. The precast cover plate 1 is located on one side of the post-cast strip facing the water-receiving surface; the partition plate 2 is located on one side of the post-cast strip facing the water-retaining surface; both sides of the precast cover plate 1 and the partition plate 2 are respectively arranged on both sides of the exterior wall 4 on both sides of the post-cast strip. The cover plate and the partition plate 2 are fixedly connected by a water-stop screw 3. The precast cover plate 1, the partition plate 2 and the exterior wall 4 on both sides of the post-cast strip form a casting cavity 5; a first waterproof layer 6 is provided on the contact surface between the precast cover plate 1 and the exterior wall 4. Among them, the precast cover plate 1 can prevent pollution and water penetration from the water-receiving surface during the casting process. The partition plate 2 is opposite to the precast cover plate in position and is fixedly connected by a water-stop screw 3 to form a casting cavity 5 for casting the post-cast strip concrete with the precast cover plate 1 and the exterior walls 4 on both sides. The first waterproof layer 6 is used to enhance the sealing performance between the precast cover plate 1 and the exterior wall 4 and prevent water from penetrating through the contact surface. That is to say, the waterproof work of the exterior wall 4 can be completed before the post-cast strip is cast. The construction of the precast cover plate 1 is simple and convenient to install. The setting of the first waterproof layer 6 can ensure good waterproof effect and reduce the cost of later maintenance, providing sufficient conditions for the subsequent backfilling of the foundation pit fat groove and the safety of the foundation pit.

[0038] In some embodiments, the precast cover plate 1 includes a connecting plate 12 and supporting plates 11 on both sides of the connecting plate 12. The first waterproof layer 6 is provided at the connection between the supporting column and the exterior wall 4. One end of the supporting plate 11 in contact with the exterior wall 4 is provided with a slope 111, and the slope 111 is located on the side away from the casting cavity; a second waterproof layer is provided on the side of the precast cover plate 1 facing the water-receiving surface. The second waterproof layer covers the precast cover plate 1 and the slope 111 and is bonded to the wall. Specifically, the connecting plate 12 and the supporting plates 11 are integrally cast with concrete. The connecting plate 12 and the supporting plates 11 are both flat structures, and the first waterproof layer 6 is arranged between the supporting plate 11 and the wall. Among them, for the first waterproof layer 6, sealing materials such as polymer cement waterproof mortar, water-swelling water-stop strips, and rubber water-stop rubber strips can be selected. Specifically, suitable materials can be selected according to the waterproof engineering conditions, environmental factors, and design requirements. The second waterproof layer is a waterproof coiled material, which further prevents water penetration by covering the precast cover plate 1 and improves the waterproof performance. Specifically, it can be asphalt waterproof coiled material, synthetic polymer waterproof coiled material, polyvinyl chloride (PVC) waterproof coiled material. It should be noted that by providing the slope 111 on the supporting plate 11 and transitioning through the slope 111 between the supporting plate 11 and the wall, when the waterproof coiled material is laid, the waterproof coiled material can better adhere to the cavity and the supporting plate 11, which can not only further improve the waterproof performance but also enable the waterproof coiled material to have a large-angle flexible transition, improving the service life of the coiled material.

[0039] In some embodiments, the slope surface 111 may be a flat surface or an arc surface. Preferably, the slope surface 111 is a flat surface, and the included angle between the slope surface 111 and the wall surface is 45°.

[0040] In some embodiments, a plurality of notches 1111 are provided on the slope surface 111. The slope surface 111 further includes a plurality of first fixing columns 1112 disposed on the support plate 11, and one end of each first fixing column 1112 is located within the notch 1111. Second fixing columns 41 are provided at positions on the wall surface corresponding to the fixing columns. The first fixing columns 1112 and the second fixing columns 41 are fixedly connected within the notch 1111. Specifically, the plurality of notches 1111 are equally spaced on the slope surface 111. Preferably, the first fixing columns 1112 are steel bars, which are embedded in the support plate 11 during the casting of the precast cover plate 1, and the second fixing columns 41 are expansion bolts provided according to the positions of the first fixing columns 1112. When the precast cover plate 1 is in the installation position, the first fixing columns 1112 and the second fixing columns 41 are fixedly connected together to improve the stability and durability of the connection between the precast cover plate 1 and the cavity. Preferably, the first fixing columns 1112 and the second fixing columns 41 are fixedly connected by welding. Further, the connection points of the first fixing columns 1112 and the second fixing columns 41 are located within the notch 1111. That is to say, after welding is completed, a filler can be applied to restore the notch 1111 to the structure of the slope surface 111, so as not to affect the subsequent laying of the second waterproof layer.

[0041] In some embodiments, the steps of manufacturing the precast cover plate 1 are as follows:

[0042] First, fix the formwork and steel bars according to the shape of the precast cover plate 1. Then, weld and fix the spacer blocks, lifting rings 121, water-stop screws 3, and the steel bars of the slope surface 111 to the formwork steel bars of the precast cover plate 1 according to their distribution positions, and reserve a plurality of notches 1111 with extruded polystyrene boards at the positions of the steel bars of the slope surface 111. Finally, pour the concrete of the precast cover plate 1. After the concrete strength of the precast concrete cover plate reaches the requirements, the formwork can be removed for standby. For the convenience of transportation, lifting rings 121 are provided on one side of the connecting plate 12 facing the casting cavity, and the lifting rings 121 are used to lift the precast cover plate 1. In addition, a layer of spacer block layer 122 is provided on one side of the connecting plate 12 facing the casting cavity to ensure that the protective layer thickness of the steel bars in the early-stage water-stop post-cast strip meets the design requirements. The spacer block layer 122 includes a plurality of vertically arranged steel bars fixed in the connecting plate 12. After the concrete is poured into the casting cavity 5, a layer of spacer block layer 122 can be formed on one side of the connecting plate 12 facing the casting cavity 5.

[0043] During use, before hoisting the precast cover plate 1 in place, a rubber waterstop strip is pasted between the support plate 11 of the precast cover plate 1 and the wall to prevent grout leakage and enhance the waterproof performance at the joint, and the fixing steel bars located on the slope 111 are fixed to the expansion bolts correspondingly arranged in the wall by welding. Further, the joints between the support plate 11 and the wall and between the support plates 11 are repaired with crack-resistant and waterproof cement mortar. It can be understood that during the construction process, multiple precast cover plates 1 need to be stacked and used together.

[0044] In some embodiments, one end of the waterstop screw 3 is fixedly connected to the precast cover plate 1, and the other end passes through the partition plate 2 and is fixedly connected by a fastener 7. It can be understood that the relatively arranged precast cover plate 1 and the partition plate 2 are fixed together by the waterstop screw 3 to form a sealed pouring cavity 5. Further, the fastener 7 is located outside the pouring cavity 5. The fastener 7 includes fastening pads 71 arranged on both sides of the waterstop screw 3, and snap rings 72 and nuts 73 located on the fastening pads 71. Tightening the nut 73 can make the snap ring 72 abut against the fastening pad 71 to fix the precast cover plate 1 and the partition plate 2 together. Among them, the fastening pad 71 is used to increase the contact area with the partition plate 2, so that the pulling force on the partition plate 2 by the waterstop screw 3 can act on the partition plate 2 evenly. It can be understood that multiple waterstop screws 3 are provided on each precast cover plate 1, and the multiple waterstop screws 3 pass through the partition plate 2 respectively and are fixed together by fasteners 7. The fastening pad 71 is preferably a steel pipe, which is relatively common at the construction site, convenient to select materials, and has extremely low cost. The snap ring 72 is a butterfly snap ring 72, and the steel pipes located on both sides of the waterstop screw 3 are fixed by the butterfly snap ring 72. The fastening pad 71 can also be a square steel, a wooden material with sufficient strength, etc., as long as it can meet the support requirements.

[0045] In some embodiments, a waterstop piece 31 is arranged on the waterstop screw 3 located in the pouring cavity 5. It can be understood that during the long-term use of the post-cast strip, the post-cast strip may be aged or even cracked during use, and there may be fine cracks along the waterstop screw 3. At this time, water may seep through the cracks. Therefore, setting the waterstop piece 31 is equivalent to setting a waterproof barrier between the fine cracks, which can isolate the infiltration of water and further improve the waterproof effect. The waterstop screw passes through the waterstop piece, and the waterstop piece is welded to the waterstop screw. The waterstop piece is preferably a steel sheet.

[0046] The above is a specific description of the preferred embodiments of the present invention, but the present invention is not limited to the above embodiments. Those skilled in the art can also make various equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent deformations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A waterproof structure of an exterior wall post-cast strip, characterized in that: include: The prefabricated cover plate is located on the water-facing side of the post-cast zone; The partition is located on the backwater side of the post-cast zone; The two sides of the prefabricated cover plate and the partition plate are respectively laid on the two sides of the outer walls on both sides of the post-cast strip, and the cover plate and the partition plate are fixedly connected by water stop screws, and the prefabricated cover plate, the partition plate and the outer walls on both sides of the post-cast strip form a casting cavity; A first waterproof layer is provided on the contact surface between the prefabricated cover plate and the exterior wall; The prefabricated cover plate comprises a connecting plate and supporting plates located on both sides of the connecting plate, the first waterproof layer is provided at the connection between the supporting plate and the outer wall, and a slope is provided on the end of the supporting plate in contact with the outer wall, and the slope is located on the side away from the casting cavity; the prefabricated cover plate is provided with a second waterproof layer on the side facing the water surface, and the second waterproof layer covers the prefabricated cover plate and the slope, and is bonded to the outer wall; The slope surface is provided with a plurality of notches, and further includes a plurality of first fixing columns arranged on the support plate, one end of the first fixing column is located in the notch; a second fixing column is arranged at a position corresponding to the fixing column on the outer wall, and the first fixing column and the second fixing column are fixedly connected in the notch; One end of the water-stop screw is fixedly connected to the prefabricated cover plate, and the other end passes through the partition plate and is fixedly connected by a fastener. A water-stop sheet is arranged on the water-stop screw located in the casting cavity; The fastener is located outside the casting cavity, and includes fastening pads arranged on both sides of the water-stop screw, and a clamping ring and a nut located on the fastening pad. Tightening the nut bolt can make the clamping ring abut against the fastening pad to fix the prefabricated cover plate and the partition plate together.

2. The exterior wall post-cast strip waterproof structure according to claim 1, characterized in that: The connection plate is provided with a lifting ring on one side facing the casting cavity, and the lifting ring is used for lifting the prefabricated cover plate.

3. The exterior wall post-cast strip waterproof structure according to claim 1, characterized in that: The connection plate is provided with an iron pad layer on one side facing the casting cavity.

4. The exterior wall post-cast strip waterproof structure according to claim 1, characterized in that: The first waterproof layer is a rubber water-stop strip layer.

5. The exterior wall post-cast strip waterproof structure according to claim 1, characterized in that: The included angle between the slope and the outer wall is 45°.

Images