Shear wall sleeve laying method and structure

Abstract

The invention relates to the field of sleeve construction, and particularly discloses a shear wall sleeve laying method and structure, and the method comprises the following steps: 1, punching a cable hole in a shear wall, embedding two water stop steel plates in the cable hole, forming holes in the two water stop steel plates, and fixing a cable sleeve in a penetrating manner, the two water stop steel plates comprise the first water stop steel plate located on the upstream face and the second water stop steel plate located on the downstream face. Secondly, a waterproof layer is laid on the outer side of the upstream face of the shear wall, and the space between the first water stop steel plate and the waterproof layer is filled with waterproof ointment; through the upstream face double water stop steel plates, the waterproof layer, blocking of the gaps between the water stop steel plates and the wall body and the progressive waterproof design of the retaining wall structure, a triple protection mechanism of rigid blocking, flexible sealing and pressure dispersion is formed, different water pressure gradients and long-term water vapor erosion can be effectively dealt with, the defect that traditional single-layer sealing is prone to failure is overcome, and the service life of the retaining wall is prolonged. And the whole-cycle waterproof performance is stable.

Description

Technical Field

[0001] The present invention belongs to the field of casing construction, and specifically relates to a method and structure for laying sleeves in shear walls. Background Art

[0002] The laying of sleeves in shear walls refers to a technical measure of pre-burying sleeves before the concrete pouring of the wall during the construction of reinforced concrete shear walls to meet the needs of pipelines, cables and other facilities to pass through the wall. This technology reserves a passage for subsequent facilities through the sleeve, avoiding directly opening holes to damage the wall structure, and at the same time ensuring that the mechanical properties and waterproof properties of the shear wall are not affected.

[0003] The traditional process only relies on the waterproof layer and a single waterstop steel plate to form a planar seal. When encountering long-term water pressure penetration or material aging, it is easy to occur that the bonding strength between the waterproof layer and the concrete base surface decays over time, resulting in the diffusion of water seepage along the interface. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a method for laying sleeves in shear walls to solve the problem that in the prior art, the traditional process only relies on the waterproof layer and a single waterstop steel plate to form a planar seal. When encountering long-term water pressure penetration or material aging, it is easy to occur that the bonding strength between the waterproof layer and the concrete base surface decays over time, resulting in the diffusion of water seepage along the interface.

[0005] A method for laying sleeves in shear walls includes the following steps:

[0006] Step 1: Drill a cable hole in the shear wall, embed two waterstop steel plates inside the cable hole, open holes in the two waterstop steel plates and fixedly penetrate the cable sleeve. The two waterstop steel plates include a first waterstop steel plate located at the water-facing side and a second waterstop steel plate located at the water-backing side;

[0007] Step 2: Lay a waterproof layer on the outside of the water-facing side of the shear wall, fill a waterproof grease between the first waterstop steel plate and the waterproof layer, and the waterproof grease is poured through a perfusion port reserved at the water-backing side;

[0008] Step 3: Set a retaining wall at a position where the cable sleeve extends 500 mm out of the shear wall surface, and pour waterproof grease between the retaining wall and the shear wall;

[0009] Step 4: Set a cable threading well outdoors, extend the cable sleeve into the cable threading well, and the waterproof layer ends at the cable sleeve.

[0010] Preferably, it further includes setting a set of flanges at the end of the cable sleeve. The set of flanges are connected by bolts, and fireproof mud is filled between the set of flanges.

[0011] Preferably, the outside of the second water stop steel plate is covered with 1:2 silicone waterproof mortar;

[0012] The cable conduits are fixed side by side in two rows on the two water stop steel plates.

[0013] Preferably, in step one, the conduits are sloped at 5% along the laying position, with the slope direction towards the outside.

[0014] Preferably, a sump is arranged at the bottom of the cable threading well.

[0015] Preferably, the inside of the first water stop steel plate and the second water stop steel plate is filled with packing.

[0016] A shear wall conduit laying structure includes a shear wall. A cable hole is formed in the shear wall. A first water stop steel plate and a second water stop steel plate are fixedly installed in the cable hole. Cable conduits are fixedly penetrated through the first water stop steel plate and the second water stop steel plate. A waterproof layer is laid on the water-facing side of the shear wall. The inside of the waterproof layer and the first water stop steel plate is filled with waterproof grease. A retaining wall is also fixedly installed on the water-facing side of the shear wall through a cushion layer. The space between the retaining wall and the waterproof layer is filled with waterproof grease.

[0017] Preferably, it further includes a cable threading well. The cable conduits extend into the cable threading well. The waterproof layer extends along the cable conduits into the cable threading well and is closed by a set of flanges. The middle position between the set of flanges is filled with fireproof mud.

[0018] Preferably, 1:2 silicone waterproof mortar is laid on the back water side of the shear wall.

[0019] Preferably, a sump is formed at the bottom of the cable threading well.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] Through the progressive waterproof design of the double water stop steel plates on the water-facing side, the waterproof layer, the gap between the water stop steel plate and the wall is sealed, and the retaining wall structure, a triple protection mechanism of "rigid barrier + flexible seal + pressure dispersion" is formed, which can effectively cope with different water pressure gradients and long-term water vapor erosion, avoid the defect that the traditional single-layer seal is easy to fail, and achieve stable waterproof performance in the whole cycle;

[0022] By rigidly connecting the retaining wall and the root of the conduit to form an integral stress unit, the shear stress caused by the settlement or thermal expansion and contraction of the wall can be dispersed synergistically, the relative displacement between the conduit and the wall can be reduced, and at the same time, the flexible filling property of the waterproof grease can buffer the micro deformation, avoiding the cracking of the rigid sealing layer due to stress concentration, and ensuring the durability of the structure under complex working conditions. Description of the Drawings

[0023] Figure 1 It is the process flow chart of the present invention;

[0024] Figure 2 It is the structural schematic diagram of the present invention.

[0025] In the figure: 1, shear wall; 2, cable sleeve; 3, the first waterstop steel plate; 4, the second waterstop steel plate; 5, waterproof layer; 6, waterproof grease; 7, retaining wall; 8, cable threading well; 9, flange; 10, silicone waterproof mortar; 11, sump pit. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] As Figure 1 shown:

[0028] Embodiment 1: The present invention provides a method for laying cable sleeves in shear walls, including the following steps:

[0029] Step 1: Drill cable holes in the shear wall, embed two waterstop steel plates inside the cable holes, drill holes in the two waterstop steel plates and penetrate and fix the cable sleeves. The two waterstop steel plates include the first waterstop steel plate located at the water-facing side and the second waterstop steel plate located at the water-backing side;

[0030] Step 2: Lay a waterproof layer on the outside of the water-facing side of the shear wall, fill waterproof grease between the first waterstop steel plate and the waterproof layer, and the waterproof grease is poured through the pouring port reserved at the water-backing side;

[0031] Step 3: Set a retaining wall at the position where the cable sleeve extends 500 mm out of the shear wall surface, and pour waterproof grease between the retaining wall and the shear wall;

[0032] Step 4: Set a cable threading well outdoors, extend the cable sleeve into the cable threading well, and the waterproof layer ends on the cable sleeve.

[0033] Specifically, it also includes setting a set of flanges at the end of the cable sleeve. The set of flanges are connected by bolts, and fireproof mud is filled between the set of flanges.

[0034] Specifically, the outside of the second waterstop steel plate is covered with 1:2 silicone waterproof mortar;

[0035] The cable sleeves are fixed side by side in two rows on the two waterstop steel plates.

[0036] Specifically, in Step 1, the casing slopes at 5% along the laying position, with the slope direction towards the outside of the building.

[0037] Specifically, a sump is arranged at the bottom of the cable threading well.

[0038] Specifically, the space between the first water stop steel plate and the second water stop steel plate is filled with packing material.

[0039] As can be seen from the above, in this method, cable holes are accurately drilled in the shear wall first, two water stop steel plates located on the water-facing side and the back water-facing side are embedded, and cable casings arranged in two rows side by side up and down are fixed by drilling holes. The casing slopes at 5% along the laying direction towards the outside of the building. At the same time, the space between the water stop steel plates is filled with packing material to effectively prevent moisture from penetrating along the hole wall.

[0040] Subsequently, a waterproof layer is laid on the outside of the water-facing side, and waterproof grease is filled between the first water stop steel plate and the waterproof layer through the reserved pouring port on the back water-facing side to further strengthen the waterproof barrier.

[0041] Next, a retaining wall is constructed 500 mm away from the outer extension of the casing and filled with waterproof grease to form a double waterproof protection.

[0042] In addition, a cable threading well with a sump is set outdoors. The casing extends into the well and the waterproof layer is properly terminated. The termination of the casing is connected by flange bolts and filled with fireproof putty to take into account both waterproof and fireproof performance.

[0043] At the same time, 1:2 silicone waterproof mortar is covered on the outside of the second water stop steel plate to enhance the waterproof effect in multiple dimensions.

[0044] Example 2: Verification of the influence of adding a retaining wall on the waterproof performance of the shear wall casing

[0045] Experimental background

[0046] In the traditional laying of shear wall casings, the cable casing and the wall are only sealed through the waterproof layer and the water stop steel plate. However, under the long-term action of water pressure or foundation settlement, water seepage channels are likely to appear at the root of the casing. In this experiment, by adding a retaining wall structure, its improvement effect on the waterproof performance is verified, and a comparative analysis is carried out with the control group without a retaining wall.

[0047] Experimental scheme

[0048] Experimental group design

[0049] Experimental group A: The method of the present invention is adopted, and a retaining wall is set 500 mm away from the water-facing side of the shear wall and filled with waterproof grease.

[0050] Control group B: No retaining wall is set, and only sealed through the waterproof layer and the water stop steel plate.

[0051] Experimental conditions

[0052] Materials:

[0053] The thickness of the shear wall is 250 mm, and the concrete strength is C30.

[0054] The cable sleeve is a DN100 galvanized steel pipe with a length of 1.2 m.

[0055] The waterproof layer uses a 2-mm-thick self-adhesive waterproof coiled material, and the waterproof ointment is a polyurethane-based material.

[0056] Environmental simulation:

[0057] Simulate the long-term water pressure environment and set the water pressure gradients (0.1 MPa, 0.3 MPa, 0.5 MPa).

[0058] Simulate the foundation settlement and apply wall displacement through a jack (0.5 mm / h, cumulative 5 mm).

[0059] Testing methods

[0060] Water seepage detection:

[0061] Install humidity sensors at the root of the sleeve to record the water seepage time and the amount of water seepage.

[0062] Use an infrared thermal imager to detect water seepage traces on the wall surface.

[0063] Structural integrity detection:

[0064] Measure the change in the gap width between the sleeve and the wall.

[0065] Observe whether peeling occurs at the joint between the waterproof layer and the sleeve.

[0066] Experimental table

[0067]

[0068] Analysis of experimental results

[0069] Comparison of waterproof performance

[0070] Under a water pressure of 0.1 MPa, the water seepage time of control group B was 40% shorter than that of experimental group A, and the amount of water seepage increased by 4 times.

[0071] When the water pressure rose to 0.5 MPa, the amount of water seepage in control group B reached 90 mL, while that in experimental group A was only 12 mL, indicating that the retaining wall structure could reduce the amount of water seepage by 86.7%.

[0072] Analysis of structural stability

[0073] The change in the gap width between the sleeve and the wall in experimental group A (0.08 mm) was only 23% of that in control group B (0.35 mm), indicating that the retaining wall could effectively limit the displacement of the sleeve.

[0074] In Control Group B, the peeling area of the waterproof layer reached 12.0 cm under a water pressure of 0.5 MPa 2 , while in Experimental Group A it was only 1.2 cm 2 , indicating that the retaining wall can reduce the risk of waterproof layer failure

[0075] Long-term durability verification

[0076] In the simulated foundation settlement experiment, the water seepage time of Experimental Group A was three times longer than that of Control Group B, indicating that the retaining wall structure can enhance the adaptability of the casing root to wall deformation

[0077] Conclusion

[0078] By adding a retaining wall structure, the waterproof performance of the shear wall casing laying method is significantly improved, specifically manifested as follows

[0079] Reduced water seepage volume: Under a water pressure of 0.5 MPa, the water seepage volume decreased by 86.7%.

[0080] Enhanced structural stability: The change in the gap between the casing and the wall decreased by 77%, and the peeling area of the waterproof layer decreased by 90%.

[0081] Improved durability: The retaining wall structure can effectively resist the water seepage risk caused by foundation settlement and extend the service life of the casing

[0082] As Figure 2 shown

[0083] Embodiment 3: A shear wall casing laying structure, including a shear wall 1, a cable hole is opened on the shear wall 1, a first water stop steel plate 3 and a second water stop steel plate 4 are fixedly installed in the cable hole, a cable casing 2 is fixedly penetrated through the first water stop steel plate 3 and the second water stop steel plate 4, a waterproof layer 5 is laid on the water-facing side of the shear wall 1, a waterproof grease 6 is filled inside the waterproof layer 5 and the first water stop steel plate 3, and a retaining wall 7 is fixedly installed on the water-facing side of the shear wall 1 through a cushion layer, and a waterproof grease 6 is filled between the retaining wall 7 and the waterproof layer 5

[0084] Specifically, it further includes a cable threading well 8, the cable casing 2 extends into the cable threading well 8, the waterproof layer 5 extends along the cable casing 2 into the cable threading well 8 and is closed by a set of flanges 9, and fireproof mud is filled in the middle position of the set of flanges 9

[0085] Specifically, a 1:2 silicone waterproof mortar 10 is laid on the back water side of the shear wall 1

[0086] Specifically, a sump 11 is opened at the bottom of the cable threading well 8

[0087] As can be seen from the above, the first waterstop steel plate 3 and the second waterstop steel plate 4 are respectively arranged on the water-facing side and the water-backing side, which can effectively block the penetration of moisture along the gap between the casing and the hole wall, forming the first waterproof barrier;

[0088] The waterproof grease 6 is filled between the waterproof layer 5 and the waterstop steel plate to further seal the fine gaps and prevent water vapor from invading;

[0089] A retaining wall 7 is added on the water-facing side and filled with waterproof grease, which strengthens the waterproof ability of the root area of the casing, especially can resist the water seepage risk caused by long-term water pressure and wall deformation;

[0090] In addition, the waterproof layer extends to the cable threading well 8 and is terminated by the flange 9. The fireproof mud is filled between the flanges, taking into account the dual requirements of waterproof and fireproof;

[0091] The water-backing side is covered with 1:2 silicone waterproof mortar 10, which can make up for the micro-cracks of the concrete and improve the overall waterproof performance;

[0092] A sump 11 is arranged at the bottom of the cable threading well to facilitate the timely drainage of the accumulated water in the well and avoid reverse osmosis;

[0093] Through multi-dimensional waterproof treatment and detail optimization, this structure significantly reduces the hidden danger of water seepage at the casing of the shear wall, and at the same time takes into account the functions of fireproof and drainage, and is applicable to scenarios with strict waterproof requirements such as high-rise buildings and underground projects.

[0094] The standard parts used in the present invention can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt the conventional means such as bolts, rivets, and welding in the existing technology. The machines, parts, and equipment all adopt the conventional models in the existing technology. In addition, the circuit connection adopts the conventional connection method in the existing technology, which will not be elaborated here. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0095] In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. The meaning of "plurality" is two or more unless otherwise specifically defined.

[0096] In the present invention, unless otherwise clearly defined or limited, terms such as "install", "connect", "link", "fix", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0097] In the present invention, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0098] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "some embodiments", "example", "specific example" or "some examples", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0099] In the attached drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved, and other structures can refer to the general design. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0100] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for laying sleeves in shear walls, characterized in that, It includes the following steps: Step 1: Drill cable holes in the shear wall, embed two waterstop steel plates inside the cable holes, drill holes in the two waterstop steel plates and fixedly penetrate the cable sleeve. The two waterstop steel plates include a first waterstop steel plate located at the water-facing side and a second waterstop steel plate located at the water-backing side; Step 2: Lay a waterproof layer on the outside of the water-facing side of the shear wall, fill waterproof grease between the first waterstop steel plate and the waterproof layer, and the waterproof grease is poured through the pouring port reserved at the water-backing side; Step 3: Set a retaining wall at the position where the cable sleeve extends 500 mm out of the shear wall surface, and pour waterproof grease between the retaining wall and the shear wall; Step 4: Set a cable threading well outdoors, extend the cable sleeve into the cable threading well, and the waterproof layer terminates at the cable sleeve.

2. The method for laying sleeves in shear walls according to claim 1, wherein, It also includes setting a set of flanges at the termination of the cable sleeve. The set of flanges are connected by bolts, and fireproof mud is filled between the set of flanges.

3. The method for laying sleeves in shear walls according to claim 1, wherein, The outside of the second waterstop steel plate is covered with 1:2 silicone waterproof mortar; The cable sleeves are fixedly arranged in two rows side by side on the two waterstop steel plates.

4. The method for laying sleeves in shear walls according to claim 1, characterized in that, In Step 1, the sleeve slopes 5% along the laying position, with the slope direction towards the outdoors.

5. The method for laying sleeves in shear walls according to claim 1, characterized in that, A sump is arranged at the bottom of the cable threading well.

6. The method for laying sleeves in shear walls according to claim 1, wherein, The inside of the first waterstop steel plate and the second waterstop steel plate is filled with filler.

7. A sleeve laying structure for shear walls, characterized in that, It includes a shear wall (1). Cable holes are opened on the shear wall (1). A first waterstop steel plate (3) and a second waterstop steel plate (4) are fixedly installed inside the cable holes. A cable sleeve (2) is fixedly penetrated through the first waterstop steel plate (3) and the second waterstop steel plate (4). A waterproof layer (5) is laid on the water-facing side of the shear wall (1). Waterproof grease (6) is filled inside the waterproof layer (5) and the first waterstop steel plate (3). A retaining wall (7) is fixedly installed on the water-facing side of the shear wall (1) through a cushion layer. Waterproof grease (6) is filled between the retaining wall (7) and the waterproof layer (5).

8. The sleeve laying structure of a shear wall according to claim 7, characterized in that, It also includes a cable threading well (8). The cable sleeve (2) extends into the cable threading well (8). The waterproof layer (5) extends along the cable sleeve (2) into the cable threading well (8), and terminates through a set of flanges (9). Fireproof mud is filled at the middle position of the set of flanges (9).

9. The laying structure of a shear wall sleeve according to claim 7, wherein 1:2 silicone waterproof mortar (10) is laid on the water-backing side of the shear wall (1).

10. The sleeve laying structure for shear wall according to claim 7, characterized in that, A sump (11) is opened at the bottom of the cable threading well (8).

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