Post-cast strip sealing front bottom plate water leakage blocking structure
By using casing and expansion water stop rubber in the rear casting tape, the leakage source of the waterproof layer is blocked, the leakage problem of the rear casting tape is solved, the waterproof effect and construction quality are improved, and subsequent leakage plugging work is reduced.
Patent Information
- Application Number
- CN202422129943.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-31
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-08-31
AI Technical Summary
In the prior art, the waterproof layer of the rear casting belt is easily damaged due to factors such as the main structure settlement and groundwater pressure, resulting in the emergence of leakage sources, affecting the quality of concrete casting and forming multiple leakage lines, increasing the difficulty and workload of leakage plugging.
The casing structure is adopted. The bottom of the casing extends into the leakage source position of the waterproof layer and the top extends into the sealing layer. Combined with the expanded water stop rubber and high-level anti-seepage concrete sealing layer, a water stop section and a filter screen are installed in the casing to prevent the leakage of water and drainage. The sealing layer is combined with the rear casting strip to improve the waterproof effect.
Effectively seal the leakage source, avoid leakage from affecting the quality of concrete pouring, reduce leakage lines, reduce the difficulty and workload of later leakage plugging, and improve the waterproof performance of the rear pouring tape.
Smart Images
Figure CN223151234U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of construction engineering, in particular to a water gushing plugging structure for the bottom slab before the post-cast strip is closed. Background Technique
[0002] In building construction, in order to prevent harmful cracks from occurring in cast-in-place reinforced concrete structures due to factors such as temperature, uneven settlement, etc., according to design or construction specification requirements, construction joints are usually left at corresponding positions of the foundation slab, wall, beam, etc., dividing the overall structure into several parts. After the internal shrinkage of the components, the concrete at the construction joint is then poured to form a post-cast strip to connect the structure into a whole. The waterproof plugging of the post-cast strip is the top priority in the basement floor waterproofing.
[0003] At present, the following methods are usually adopted for the waterproofing of the post-cast strip: before constructing the post-cast strip, a waterproof layer and a waterproof strengthening layer are set on the cushion layer, a water stop steel plate is set at the joint between the side of the bottom slab concrete and the post-cast strip concrete, and then the post-cast strip concrete is poured; or before constructing the post-cast strip, a waterproof layer and a waterproof strengthening layer are set on the cushion layer, and after setting an advanced water stop belt on the waterproof layer and the waterproof strengthening layer, the post-cast strip concrete is then poured.
[0004] The waterproof design of the above two construction methods is a waterproof layer and a waterproof strengthening layer, and the waterproof layer is set above the waterproof strengthening layer. The waterproof layer generally uses waterproof coiled materials, etc. In actual construction, the post-cast strip needs to be constructed after the main structure is closed, and the shelving time is relatively long. The waterproof coiled materials are easily damaged and invalid due to factors such as the settlement of the main structure, the action of groundwater pressure, poor sealing at the joint, weak bonding with the cushion layer, and bottom slab construction, resulting in leakage sources at the position of the post-cast strip. Affected by the upward water pressure of the groundwater, the water at the leakage source continuously flows out, affecting the pouring quality of the post-cast strip concrete; after the groundwater leaks from the leakage source, it will also continuously erode the poured but not fully coagulated concrete. After the post-cast strip concrete solidifies, there will be many leakage lines in the post-cast strip structure, resulting in many leakage points on the surface of the post-cast strip. After plugging the known leakage points of the post-cast strip, there will still be hidden dangers of other leakage points that have not leaked to the surface of the post-cast strip along the leakage lines, increasing the subsequent plugging difficulty and workload. Content of the Utility Model
[0005] One of the purposes of the utility model is at least to provide a water gushing plugging structure for the bottom slab before the post-cast strip is closed, which can plug the leakage source of the waterproof layer, avoid continuous water seepage from the leakage source to generate multiple leakage lines in the post-cast strip structure, and reduce the subsequent plugging difficulty and workload of the post-cast strip.
[0006] In order to achieve the above purpose, the technical solutions adopted by the utility model include the following aspects.
[0007] A water-blocking structure for the water gushing from the bottom slab before the post-cast strip is closed, comprising a cushion layer, a waterproof layer, a post-cast strip, a casing and a blocking layer. Among them, the waterproof layer is arranged on the cushion layer, the post-cast strip is arranged on the waterproof layer, the casing is vertically arranged in the post-cast strip, the bottom of the casing extends to the position of the leakage source on the waterproof layer, the bottom of the casing contacts the waterproof layer, the top of the casing extends into the blocking layer, and the blocking layer is embedded in the post-cast strip.
[0008] Preferably, one or more annular water-stop joints are arranged in the length direction of the casing, and the water-stop joints are welded to the casing.
[0009] Preferably, an expanding water-stop rubber is arranged in the casing, and the expanding water-stop rubber is arranged along the length direction of the casing.
[0010] Preferably, the bottom of the expanding water-stop rubber extends to the bottom of the casing, and an expanding waterproof sealant is filled between the top of the expanding water-stop rubber and the top opening of the casing.
[0011] Preferably, an annular connecting joint is arranged at the top opening position of the casing, and a water-stop cap for closing the casing is arranged on the top surface of the connecting joint.
[0012] Preferably, the blocking layer is made of expanding impermeable concrete with a strength grade one higher than that of the post-cast strip.
[0013] Preferably, a reinforcing steel bar layer is further arranged in the cushion layer, and the width of the reinforcing steel bar layer is not less than the width of the post-cast strip.
[0014] Preferably, a filter screen is arranged at the bottom opening of the casing.
[0015] Preferably, the thickness of the blocking layer is 1 / 3 - 2 / 3 of the thickness of the post-cast strip, and the width of the blocking layer is 80 mm - 150 mm.
[0016] Preferably, the casing is a steel casing with a nominal diameter of not less than 15 mm, and the top of the casing extends into the blocking layer by 3 - 5 cm.
[0017] In summary, due to the adoption of the above technical solutions, the present utility model has at least the following beneficial effects:
[0018] Before the post-cast strip of the utility model is closed, the water seepage plugging structure of the bottom slab can effectively plug the leakage source caused by the damage of the waterproof layer, avoid affecting the casting quality of the post-cast strip due to continuous water seepage from the leakage source from the source, and avoid generating multiple leakage lines in the post-cast strip due to water seepage from the leakage source. Compared with plugging multiple leakage lines in the post-cast strip later, plugging from the leakage source greatly reduces the plugging difficulty and workload. By setting a casing with a water stop joint, after the casing covers the leakage source, the water seeping out from the leakage source can be led out from the casing. Before or during the casting of the post-cast strip concrete, the water seeping out from the leakage source can be effectively prevented from contacting the concrete, thus effectively avoiding the generation of leakage lines in the post-cast strip.
[0019] By filling the casing with expanded water-stop rubber and setting a plugging layer with anti-seepage concrete one grade higher than that of the post-cast strip, the casing can be effectively plugged, further improving the anti-seepage ability of the post-cast strip. Brief Description of the Drawings
[0020] Figure 1 It is a schematic diagram of the water seepage plugging structure of the bottom slab before the post-cast strip of the exemplary embodiment of the utility model is closed.
[0021] Figure 2 It is a schematic diagram of the water seepage plugging structure of the bottom slab before the post-cast strip of another exemplary embodiment of the utility model is closed.
[0022] Figure 3 It is an enlarged schematic diagram of the connection between the water stop cap and the connection joint of the exemplary embodiment of the utility model.
[0023] Labels in the figure: 1 - cushion layer, 2 - waterproof layer, 3 - post-cast strip, 4 - leakage source, 5 - casing, 6 - plugging layer, 7 - water stop joint, 8 - expanded water-stop rubber, 9 - top layer steel bar frame, 10 - bottom layer steel bar frame, 11 - strengthening steel bar layer, 12 - connection joint, 13 - water stop cap, 14 - waterproof strengthening layer. Detailed Description of the Embodiment
[0024] The following further details the present utility model in conjunction with the drawings and embodiments, so as to make the purpose, technical solution and advantages of the present utility model clearer. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0025] As Figure 1As shown in the figure, the water seepage plugging structure at the bottom plate before the closure of the post-cast strip in the exemplary embodiment of the utility model includes a cushion layer 1, a waterproof layer 2, a post-cast strip 3, a casing 5 and a plugging layer 6. Among them, the waterproof layer 2 is arranged on the cushion layer 1, the post-cast strip 3 is arranged on the waterproof layer 2, the casing 5 is vertically arranged in the post-cast strip 3, the bottom of the casing 5 extends to the position of the leakage source 4 on the waterproof layer 2, the bottom of the casing 5 contacts the waterproof layer 2, the top of the casing 5 extends into the plugging layer 6, the plugging layer 6 is embedded in the post-cast strip 3, and the top surface of the plugging layer 6 is flush with the top surface of the post-cast strip 3.
[0026] After the casing 5 is arranged at the position of the leakage source 4 of the waterproof layer 2, before and during the concrete pouring of the post-cast strip 3, the water seeping out from the leakage source 4 can be led out through the casing 5, avoiding the influence of the seeping groundwater on the concrete pouring quality of the post-cast strip 3. During the solidification process after the concrete pouring of the post-cast strip 3 is completed, the casing 5 can prevent the leakage source 4 from directly contacting the concrete of the post-cast strip 3, and can avoid multiple leakage lines from being formed from the leakage source 4 to the concrete under the pressure of the groundwater in the post-cast strip 3, thus avoiding multiple leakage points on the surface of the post-cast strip 3, improving the construction quality of the post-cast strip 3, and reducing the difficulty and workload of plugging the leakage points in the later stage.
[0027] One or more annular water stop joints 7 are arranged in the length direction of the casing 5, and the water stop joints 7 are welded to the casing 5; after the casing 5 is embedded in the post-cast strip 3, the water stop joints 7 can prevent the water seeping out from the leakage source 4 from leaking upward along the outer wall of the casing 5, improving the water stop effect on the post-cast strip 3.
[0028] An expanding water stop rubber 8 is arranged in the casing 5, and the expanding water stop rubber 8 is arranged along the length direction of the casing 5; the expanding water stop rubber 8 can plug the leakage source 4, and the expanding water stop rubber 8 fits tightly with the inner wall of the casing 5 after contacting water, which can prevent the water seeping out from the leakage source 4 from leaking upward along the inner wall of the casing 5, improving the water stop effect on the post-cast strip 3. The bottom of the expanding water stop rubber 8 extends to the bottom of the casing 5. When the expanding water stop rubber 8 fills to a position close to 2 - 6 cm from the top opening of the casing 5, an expanding waterproof sealant is filled in the casing 5. Under the combined action of the expanding water stop rubber 8 and the expanding waterproof sealant, the plugging ability of the casing 5 can be further improved.
[0029] A circular connecting joint 12 is arranged at the top opening position of the casing 5 (refer to Figure 2 , Figure 3 ), the connecting joint 12 is welded to the casing 5, the top surface of the connecting joint 12 is flush with the top surface of the casing 5 or the top surface height of the connecting joint 12 is higher than the top surface height of the casing 5, and a water stop cap 13 for closing the top opening of the casing 5 is arranged on the top surface of the connecting joint 12; after the water stop cap 13 seals the casing 5, it can completely prevent the groundwater from seeping out from the casing 5, improving the plugging effect.
[0030] The casing 5 is made of a steel casing with a nominal diameter of not less than 15 mm. The nominal diameter of the steel casing is preferably 15 - 40 mm, and its specific diameter is determined according to the size of the leakage source 4. During use, the steel casing can prevent the casing 5 from deforming during use and ensure good contact between the casing 5 and the concrete of the post-cast strip 3. A filter screen is provided at the bottom opening of the casing 5. After the casing 5 contacts the waterproof layer 2, during the drainage process, the filter screen can prevent fine sand and gravel from entering the casing 5 and blocking the casing.
[0031] The plugging layer 6 is made of expansive impermeable concrete one grade higher than that of the post-cast strip 3 to ensure good bonding between the concrete of the plugging layer 6 and the post-cast strip 3, avoid cracks at the bonding position between the plugging layer 6 and the post-cast strip 3, and improve the waterproof plugging performance of the casing 5. The thickness of the plugging layer 6 is 1 / 3 - 2 / 3 (preferably 1 / 2) of the thickness of the post-cast strip 3, and the width of the plugging layer 6 is 80 mm - 150 mm, which can not only effectively plug the casing 5 but also ensure the structural strength of the plugging layer 6 itself and the strength of the overall structure formed by the combination of the plugging layer 6 and the post-cast strip 3. The top of the casing 5 extends into the plugging layer 6 by 3 - 5 cm, which improves the plugging ability of the plugging layer 6 for the casing 5.
[0032] A reinforcing steel bar layer 11 is also provided in the cushion layer 1. The reinforcing steel bar layer 11 is arranged below the waterproof reinforcing layer 14, and the waterproof reinforcing layer 14 is arranged in the cushion layer 1. The setting width of the reinforcing steel bar layer 11 is not less than the width of the post-cast strip 3. Before the concrete of the post-cast strip 3 is poured, the reinforcing steel bar layer 11 can improve the structural strength of the cushion layer 1 and prevent the cushion layer 1 from being affected by the pressure of groundwater and thus affecting its structural strength. In the post-cast strip 3, a bottom steel bar frame 10 is arranged near the bottom surface of the post-cast strip, and a top steel bar frame 9 is arranged near the top surface of the post-cast strip. The top steel bar frame 9 and the bottom steel bar frame 10 are used to strengthen the structural strength of the post-cast strip 3. The casing 5 is tied or welded to the top steel bar frame 9 and / or the bottom steel bar frame 10 to ensure the stability of the casing 5 and prevent the casing 5 from shifting during the concrete pouring process of the post-cast strip 3, which may affect the plugging effect on the leakage source 4. The top steel bar frame 9 and the bottom steel bar frame 10 of the post-cast strip 3 are both arranged when the bottom slab steel bars are tied, that is, the top steel bar frame 9 of the post-cast strip 3 is also the top steel bar frame of the bottom slab, and the bottom steel bar frame 10 of the post-cast strip 3 is also the bottom steel bar frame of the bottom slab.
[0033] The above is only a detailed description of the specific embodiments of the present invention, rather than a limitation to the present invention. Various substitutions, variations, and improvements made by those skilled in the relevant technical fields without departing from the principles and scope of the present invention should be included within the protection scope of the present invention.
Claims
1. A water seepage plugging structure for the bottom slab before the post-cast strip is closed, characterized in that, It includes a cushion layer (1), a waterproof layer (2), a post-cast strip (3), a casing (5) and a plugging layer (6). Among them, the waterproof layer (2) is arranged on the cushion layer (1), the post-cast strip (3) is arranged on the waterproof layer (2), the casing (5) is vertically arranged in the post-cast strip (3), the bottom of the casing (5) extends to the position of the leakage source (4) on the waterproof layer (2), the bottom of the casing (5) contacts the waterproof layer (2), the top of the casing (5) extends into the plugging layer (6), and the plugging layer (6) is embedded in the post-cast strip (3).
2. The water gushing plugging structure of the bottom slab before the post-cast strip is closed according to claim 1, characterized in that One or more annular water stop joints (7) are arranged in the length direction of the casing (5), and the water stop joints (7) are welded to the casing (5).
3. The water seepage plugging structure of the bottom slab before the post-cast strip is closed according to claim 1, characterized in that, An expansion water stop rubber (8) is arranged in the casing (5), and the expansion water stop rubber (8) is arranged along the length direction of the casing (5).
4. The water gushing prevention structure for the bottom slab before the closure of the post-cast strip according to claim 3, characterized in that, The bottom of the expansion water stop rubber (8) extends to the bottom of the casing (5), and an expansion waterproof sealant is filled between the top of the expansion water stop rubber (8) and the top opening of the casing (5).
5. The water seepage plugging structure of the bottom slab before the post-cast strip is closed according to claim 4, characterized in that, A circular connecting joint (12) is arranged at the top opening position of the casing (5), and a water stop cap (13) for closing the casing (5) is arranged on the top surface of the connecting joint (12).
6. The structure for plugging water gushing from the bottom slab before the post-cast strip is closed according to claim 1, characterized in that The plugging layer (6) is made of expansion impermeable concrete one grade higher than that of the post-cast strip (3).
7. The structure for plugging water gushing from the bottom slab before the post-cast strip is closed according to claim 1, characterized in that, A reinforcing steel bar layer (11) is also arranged in the cushion layer (1), and the width of the reinforcing steel bar layer (11) is not less than the width of the post-cast strip (3).
8. The water gushing plugging structure for the bottom slab before the post-cast strip is closed according to claim 1, characterized in that, A filter screen is arranged at the bottom opening of the casing (5).
9. The water gushing prevention structure for the bottom slab before the post-cast strip is closed according to claim 1, characterized in that, The layer thickness of the plugging layer (6) is 1 / 3 - 2 / 3 of the thickness of the post-cast strip (3), and the width of the plugging layer (6) is 80 mm - 150 mm.
10. The post - casting belt closing front floor water gushing plugging structure according to any one of claims 1 to 9, characterized in that, The casing (5) is made of a steel casing with a nominal diameter of not less than 15 mm, and the top of the casing (5) extends into the plugging layer (6) by 3 - 5 cm.