Basement bottom plate anti-floating anchor rod waterproof structure and construction method thereof

Abstract

The invention provides a basement bottom plate anti-floating anchor rod waterproof structure and a construction method thereof, and belongs to the technical field of underground waterproof construction. The waterproof structure comprises an anti-floating anchor rod, a concrete cushion layer, a sealing ring, a bottom waterproof layer, a sealing body, a water stop ring, a top waterproof layer, a protective layer and a bottom plate. By arranging the sinking groove, the sealing ring, the bottom waterproof layer, the sealing body, the water stop ring and the top waterproof layer, a multi-layer and multi-material waterproof system is formed, permeation of underground water is blocked layer by layer, good sealing performance is achieved, and the leakage problem at the joint of the basement bottom plate anti-floating anchor rod and the basement bottom plate can be effectively solved; meanwhile, by arranging the sinking groove and increasing the thickness of the protection layer, a good protection effect is formed on the waterproof structure, the stability and integrity of the waterproof structure are improved, and the strength and stability of the basement structure are ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of underground waterproof construction, and in particular relates to an anti-floating anchor rod waterproof structure of a basement floor and a construction method thereof. Background Art

[0002] With the continuous development of urban construction, the development and utilization of underground space has become more and more extensive, among which the waterproofing of basements is the focus and difficulty in engineering construction. Anti-floating anchor rods are a commonly used structural form in the anti-floating design of basements. However, the junction between the anti-floating anchor rods and the basement floor is often prone to leakage, causing erosion and damage to the basement structure, resulting in reduced structural strength and stability of the basement, seriously affecting the use function and safety of the basement. The prior art sets sealing rings, water stop rings and waterproof membranes at the junction of the anti-floating anchor rods and the basement floor ring. Although it can play a certain waterproof role, the structure is difficult to seal tightly and has poor stability and integrity. It is easily affected by the external environment and causes a decrease in waterproof performance. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a basement floor anti-floating anchor waterproof structure and a construction method thereof, which can effectively solve the leakage problem at the junction of the basement floor anti-floating anchor and the basement floor, and has good sealing effect and stability.

[0004] The technical solution adopted by the present invention is: a basement floor anti-floating anchor rod waterproof structure, comprising:

[0005] An anti-floating anchor rod, wherein the anti-floating anchor rod is embedded in the anchor body;

[0006] A concrete cushion layer, wherein the concrete cushion layer comprises a sinking groove, and the bottom end of the sinking groove is integrally connected to the anchor body;

[0007] A sealing ring is arranged on the upper part of the anchor body and surrounds the anti-floating anchor rod;

[0008] A bottom waterproof layer, covering the sealing ring and the sinking groove;

[0009] A sealing body, filled in the sunken groove above the bottom waterproof layer;

[0010] A water stop ring is arranged on the upper part of the sealing body and surrounds the anti-floating anchor rod;

[0011] A top waterproof layer, covering the water stop ring and the bottom waterproof layer;

[0012] A protective layer covering the top waterproof layer;

[0013] A bottom plate is arranged above the protective layer, and the top end of the anti-floating anchor rod is buried in the bottom plate.

[0014] Furthermore, the thickness of the side wall of the sunken groove is not less than the thickness of the concrete cushion layer at other locations.

[0015] Furthermore, the sinking groove is in the shape of a cylinder that is larger at the top and smaller at the bottom.

[0016] Furthermore, the sealing ring is a waterproof expansion type sealing ring.

[0017] Furthermore, the bottom waterproof layer includes a waterproof coating layer, which is coated on the upper part of the sealing ring and extends to the surface of the concrete cushion layer around the sinking groove.

[0018] Furthermore, the bottom waterproof layer also includes a waterproof additional layer, which is adhered to the surface of the waterproof coating layer in the sunken groove and extends to the outside of the sunken groove.

[0019] Furthermore, the filling height of the sealing body is lower than the top of the sinking groove.

[0020] Furthermore, the top waterproof layer includes sealing asphalt and waterproof membrane, the sealing asphalt is coated on the upper part of the water stop ring, and the waterproof membrane is paved over a large area on the inner and outer sides of the sinking groove.

[0021] Furthermore, the thickness of the protective layer at a position corresponding to the sunken groove is greater than that of other positions.

[0022] The method for constructing the anti-floating anchor rod waterproof structure of the basement floor as described above comprises the following steps:

[0023] Anti-floating anchor rod construction and grouting to form anchor body;

[0024] Construction of foundation cushion layer to form a sinking groove;

[0025] A sealing ring is provided at the contact position between the anti-floating anchor rod and the upper surface of the anchor body;

[0026] Apply waterproof coating on the inner side and the periphery of the sunken groove to form a waterproof coating layer;

[0027] Laying a waterproof additional layer on the waterproof coating layer;

[0028] Filling a sealing body in the sunken groove;

[0029] A water stop ring is provided at the contact position between the anti-floating anchor rod and the upper surface of the sealing body;

[0030] Apply sealing asphalt on the water stop ring;

[0031] Laying waterproof membrane over large areas;

[0032] Pouring protective layer;

[0033] Cast the base slab.

[0034] The advantages and positive effects of the present invention are as follows: the present invention forms a multi-level, multi-material waterproof system by arranging a sinking groove, a sealing ring, a bottom waterproof layer, a sealing body, a water stop ring and a top waterproof layer, which blocks the infiltration of groundwater layer by layer and has good sealing performance, and can effectively solve the leakage problem at the junction of the anti-floating anchor rod of the basement floor and the basement floor; at the same time, by arranging the sinking groove and increasing the thickness of the protective layer, a good protective effect is formed on the waterproof structure, the stability and integrity of the waterproof structure are improved, and the strength and stability of the basement structure are ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of a specific embodiment of the present invention.

[0036] In the figure:

[0037] 1. Anti-floating anchor rod; 2. Anchor body; 3. Concrete cushion layer; 31. Sinking groove; 4. Sealing ring; 5. Bottom waterproof layer; 51. Waterproof coating layer; 52. Waterproof additional layer; 6. Sealing body; 7. Waterstop ring; 8. Top waterproof layer; 81. Sealing asphalt; 82. Waterproof membrane; 9. Protective layer; 10. Base plate. DETAILED DESCRIPTION

[0038] The embodiments of the present invention are described below with reference to the accompanying drawings.

[0039] like Figure 1 As shown, the embodiment of the present application proposes an anti-floating anchor waterproof structure for a basement floor, including an anti-floating anchor 1, a concrete cushion layer 3, a sealing ring 4, a bottom waterproof layer 5, a sealing body 6, a water stop ring 7, a top waterproof layer 8, a protective layer 9 and a base plate 10. The above-mentioned parts are described in detail below.

[0040] The anti-floating anchor rod 1 is embedded in the anchor body 2, and its bottom end extends deep into the soil, and is used to improve the anti-floating ability of the basement floor 10 and other structures;

[0041] The concrete cushion layer 3 is used to connect the anchor body 2 and the anti-floating anchor rod 1, and includes a sinking groove 31. The bottom end of the sinking groove 31 is connected to the anchor body 2 as a whole. The sinking groove 31 is arranged around the anti-floating anchor rod 1, and is the basis for setting a waterproof structure. The waterproof structure is arranged below the height of the concrete cushion layer 3 through the sinking groove 31, which not only improves the stability of the waterproof structure, but also forms a waterproof barrier along the vertical direction of the concrete cushion layer 3, and limits the connection part between the anti-floating anchor rod 1 and the waterproof structure to a certain range, so as to prevent the groundwater from seeping out horizontally and affecting the waterproof effect of other parts;

[0042] The sealing ring 4 is arranged on the upper part of the anchor body 2 and surrounds the anti-floating anchor rod 1, and is used to seal the contact area between the anti-floating anchor rod 1 and the upper part of the anchor body 2 to prevent groundwater from penetrating upward along the anti-floating anchor rod 1;

[0043] The bottom waterproof layer 5 covers the sealing ring 4 and the sunken groove 31, providing a preliminary waterproof barrier;

[0044] The sealing body 6 is filled in the sunken groove 31 above the bottom waterproof layer 5 and can be in close contact with the two to form a good sealing effect;

[0045] The water stop ring 7 is arranged on the upper part of the sealing body 6 and surrounds the anti-floating anchor rod 1 to further prevent groundwater from penetrating upward along the anti-floating anchor rod 1;

[0046] The top waterproof layer 8 covers the water stop ring 7 and the bottom waterproof layer 5 to form another waterproof barrier;

[0047] The protective layer 9 covers the top waterproof layer 8 to provide physical protection for the waterproof structural layer;

[0048] The bottom plate 10 is arranged above the protective layer 9 , and the top end of the anti-floating anchor rod 1 is buried in the bottom plate 10 .

[0049] The present invention sets up a multi-layer waterproof structure, including a sinking groove 31, a sealing ring 4, a bottom waterproof layer 5, a sealing body 6, a water stop ring 7 and a top waterproof layer 8, to block the infiltration of groundwater layer by layer. Through the mutual cooperation of these technical features, the leakage problem at the junction of the anti-floating anchor rod 1 of the basement floor 10 and the basement floor 10 can be effectively solved; compared with the prior art, the waterproof structure of the present invention is more rigorous and more stable, which can effectively prevent the infiltration of groundwater and ensure the strength and stability of the basement structure.

[0050] Furthermore, the present application also proposes that the thickness of the side wall of the sunken groove 31 is not less than the thickness of the concrete cushion layer 3 in other parts. This design ensures that the structural strength of the sunken groove 31 will not decrease due to insufficient thickness when subjected to force. Specifically, the side wall of the sunken groove 31 can be cast with concrete of the same or higher strength grade as the concrete cushion layer 3 to ensure that its thickness meets the design requirements and further improve the stability and safety of the overall structure. For example, the thickness of the side wall of the groove can be controlled by the template during the construction process, and the proportion and construction process can be strictly controlled during the concrete pouring to ensure that the thickness and strength of the side wall of the groove achieve the expected effect, which is conducive to ensuring the overall stability of the multi-layer waterproof structure.

[0051] Furthermore, the sunken groove 31 in the present application can be set to various shapes as needed. In order to ensure the continuity and integrity of the waterproof structure layer, the inner wall of the sunken groove 31 is preferably designed to be a smooth structure. The embodiment of the present application proposes a preferred structure of the sunken groove 31, which is set to be a cylindrical shape with a larger top and a smaller bottom. Such a structural design also helps to increase the contact area between the bottom waterproof layer 5 and the top waterproof layer 8 and the sunken groove 31, thereby improving the sealing effect and reducing the risk of leakage, so that the waterproof effect is more durable and reliable.

[0052] As a preferred embodiment, the sunken groove 31 can be realized by a mold forming method, which can ensure the precise shape of the sunken groove 31 and ensure that its shape meets the waterproof requirements while facilitating construction by workers.

[0053] Furthermore, the sealing ring 4 in the present application preferably adopts a waterproof expansion type sealing ring 4, which can fill the gap at the junction of the anti-floating anchor rod 1 and the sinking groove 31 after swelling in water, thereby improving the waterproof performance. By using the waterproof expansion type sealing ring 4, the problem of insufficient waterproof performance at the junction of the anti-floating anchor rod 1 and the basement floor 10 can be effectively solved, the waterproof sealing effect can be enhanced, and the occurrence of leakage can be avoided.

[0054] In a specific embodiment, the sealing ring 4 can be made of a rubber material that swells when exposed to water or a polymer material that has water-swelling properties. The shape and size of the sealing ring 4 are customized according to the radius of the anti-floating anchor rod 1 to ensure that it can provide reliable waterproof performance.

[0055] Furthermore, the bottom waterproof layer 5 in the present application includes a waterproof coating layer 51, which is coated on the upper part of the sealing ring 4 and extends to the surface of the concrete cushion layer 3 around the sinking groove 31. The function of the waterproof coating layer 51 is to form a waterproof barrier by covering the sealing ring 4, the inner wall of the sinking groove 31 and the surface of the concrete cushion layer 3 around it, which can effectively prevent groundwater from penetrating above the concrete cushion layer 3 and improve the waterproof effect at the junction of the anti-floating anchor rod 1 and the basement floor 10.

[0056] The waterproof coating layer 51 can be made of various types of waterproof coatings, such as polyurethane waterproof coatings, acrylic waterproof coatings or other coatings with good waterproof properties. These coatings have strong adhesion and ductility, and can form a continuous and uniform coating on the surface of the sealing ring 4 and the concrete cushion layer 3. In addition, the thickness of the waterproof coating layer 51 can be adjusted according to actual needs to ensure that it has sufficient waterproof performance and durability.

[0057] Furthermore, the bottom waterproof layer 5 in the present application also includes a waterproof additional layer 52, which is adhered to the surface of the waterproof coating layer 51 in the sunken groove 31 and extends to the outside of the sunken groove 31; the waterproof additional layer 52 is combined with the waterproof coating layer 51 to enhance the sealing and stability of the waterproof layer. Specifically, the waterproof additional layer 52 can be made of a polymer waterproof roll 82, a rubber waterproof membrane or other materials with high waterproof performance, which has good ductility and tear resistance, can adapt to the deformation of the sunken groove 31, significantly improves the overall performance of the bottom waterproof layer 5, reduces the risk of groundwater infiltration, and enhances the durability and reliability of the waterproof structure.

[0058] Furthermore, the filling height of the sealing body 6 in the present application is lower than the top of the sunken groove 31. By controlling the filling height of the sealing body 6 to be lower than the top of the sunken groove 31, sufficient space is reserved for the subsequent setting of the top waterproof layer 8, which is beneficial to ensure the stability and effectiveness of the sealing body 6 and the top waterproof layer 8 in the waterproof structure; as a preferred embodiment, the sealing body 6 is made of waterproof paste, which can be tightly connected with the bottom and surrounding waterproof additional layer 52 to form an integral structure, further improving the stability and waterproof effect of the waterproof structure.

[0059] Furthermore, the top waterproof layer 8 in the present application includes sealing asphalt 81 and waterproof membrane 82, the sealing asphalt 81 is coated on the upper part of the water stop ring 7, and the waterproof membrane 82 is laid on a large area on the inner and outer sides of the sunken groove 31; the sealing asphalt 81 provides good sealing performance, and the large-area laying of the waterproof membrane 82 connects the waterproof membrane 82 in the sunken groove 31 and the waterproof membrane 82 on other concrete cushion layers 3 together, which can form a continuous waterproof barrier, further enhancing the overall waterproof performance, and also having higher stability and durability, reducing the risk of leakage.

[0060] Preferably, the thickness of the protective layer 9 in the present application at the position corresponding to the sunken groove 31 is greater than that at other positions. By increasing the thickness of the protective layer 9 at the position corresponding to the sunken groove 31, a stronger protective effect can be provided for the top waterproof layer 8, the sealing body 6, and the bottom waterproof layer 5 thereunder. At the same time, the contact area between the anti-floating anchor 1 and the protective layer 9 is increased, so that a more stable connection is formed between the anti-floating anchor 1, the protective layer 9, the top waterproof layer 8, the sealing body 6, the bottom waterproof layer 5 and the anchor body 2, thereby ensuring the long-term stability and reliability of the waterproof structure.

[0061] The second aspect of the present application provides a method for constructing an anti-floating anchor waterproof structure of a basement floor, which specifically includes the following steps:

[0062] S1, constructing the anti-floating anchor rod 1 and grouting to form the anchor body 2;

[0063] Specifically, a mounting hole is dug at a preset position of the anti-floating anchor rod 1, and then the anti-floating anchor rod 1 is implanted in the mounting hole, and then gravel is backfilled within the depth range of the mounting hole, and finally cement slurry is injected from the bottom of the hole using a grouting process to form a gravel-filled grouting body, which is the anchor body 2; during the construction of the anti-floating anchor rod 1, it should be ensured that the length, diameter and spacing of the anti-floating anchor rod 1 meet the design requirements, and after the grouting is completed, the foundation cushion layer construction shall be started after the anchor rod pull-out test is passed after natural curing for 14 days.

[0064] S2, foundation cushion construction, forming a sinking groove 31;

[0065] Specifically, the shape of the sunken groove 31 is formed when the foundation cushion layer is supported by formwork, and then concrete is poured to ensure that the inner wall of the sunken groove 31 after forming is flat and smooth, so as to facilitate the subsequent application of waterproof coating and laying of the waterproof additional layer 52 to ensure the construction quality.

[0066] S3, a sealing ring 4 is provided at the contact position between the anti-floating anchor rod 1 and the upper surface of the anchor body 2;

[0067] Specifically, the sealing ring 4 is customized according to the size of the anti-floating anchor rod 1 to ensure that the sealing ring 4 is in close contact with the anti-floating anchor rod 1 .

[0068] S4, applying waterproof coating on the inner side and the periphery of the sunken groove 31 to form a waterproof coating layer 51;

[0069] Specifically, the waterproof coating is applied to the surface of the base cushion layer outside the sinking groove 31 .

[0070] S5, laying a waterproof additional layer 52 on the waterproof coating layer 51;

[0071] Specifically, the paving range of the waterproof additional layer 52 is larger than the coating range of the waterproof coating.

[0072] S6, filling the sealing body 6 in the sinking groove 31;

[0073] During filling, the filling height of the sealing body 6 should be strictly controlled to ensure that the sealing body 6 is densely filled and tightly connected with the waterproof additional layer 52 to form a whole.

[0074] S7, a water stop ring 7 is provided at the contact portion between the anti-floating anchor rod 1 and the upper surface of the sealing body 6 to prevent groundwater from penetrating through the contact portion between the anti-floating anchor rod 1 and the sealing body 6;

[0075] S8, applying sealing asphalt 81 on the water stop ring 7 to further enhance the sealing performance;

[0076] S9, laying the waterproofing membrane 82 over a large area, so that the waterproofing membrane 82 covers the entire concrete cushion layer 3, forming a good integrity and improving the waterproofing effect;

[0077] S10, pouring a protective layer 9 to provide good protection for the waterproof structure below;

[0078] S11, pouring the base plate 10.

[0079] Thus, through the multi-layer, multi-material waterproof system, the waterproof problem at the junction of the anti-floating anchor rod 1 and the basement floor 10 is effectively solved, and the waterproof performance and stability of the basement structure are improved. Compared with the prior art, the present application forms an efficient waterproof system by setting a sinking groove 31, a sealing ring 4, a water stop ring 7 and multiple layers of waterproof materials, which overcomes the problems of poor sealing and poor stability in the prior art and ensures the use function and safety of the basement.

[0080] The technical solution of the present application is described in detail below through a specific embodiment;

[0081] A basement floor anti-floating anchor rod waterproof structure, comprising an anti-floating anchor rod 1, a concrete cushion layer 3, a sealing ring 4, a bottom waterproof layer 5, a sealing body 6, a water stop ring 7, a top waterproof layer 8, a protective layer 9 and a base plate 10, wherein:

[0082] The bottom end of the anti-floating anchor rod 1 is embedded in the anchor body 2. The anchor body 2 is a gravel filling grouting body. The size of the gravel is 0.5-1 cm. The grouting strength is M30, and the grouting pressure is not less than 2 MPa.

[0083] The concrete cushion layer 3 is made of 10 cm thick C15 concrete and includes a sinking groove 31. The bottom end of the sinking groove 31 is connected to the anchor body 2. The sinking groove 31 is a cylindrical shape with a larger top and a smaller bottom. The depth is 20 cm, the lower diameter is 10 cm, and the upper diameter is 30 cm.

[0084] The sealing ring 4 is arranged on the upper part of the anchor body 2 and surrounds the anti-floating anchor rod 1, and adopts a water-expandable sealing ring 4;

[0085] The bottom waterproof layer 5 includes, covering the sealing ring 4 and the sunken groove 31, a waterproof coating layer 51 and a waterproof additional layer 52, wherein the waterproof coating layer 51 adopts a non-curing asphalt waterproof coating with a coating thickness of 2mm; the waterproof additional layer 52 adopts a 4mm thick SBS polytetrafluoroethylene modified asphalt waterproof membrane;

[0086] The sealing body 6 is filled in the sunken groove 31 above the bottom waterproof layer 5, using waterproof paste, and the filling depth is 15cm;

[0087] The water stop ring 7 is arranged on the upper part of the sealing body 6 and surrounds the anti-floating anchor rod 1;

[0088] The top waterproof layer 8 covers the water stop ring 7 and the bottom waterproof layer 5, and includes a sealing asphalt 81 and a waterproofing membrane 82, wherein the waterproofing membrane 82 is a 4 mm thick SBS polytetrafluoroethylene modified asphalt waterproofing membrane, and is constructed in the form of large-area paving;

[0089] The protective layer 9, covering the top waterproof layer 8, is made of 5 cm thick fine stone concrete;

[0090] The bottom plate 10 is arranged above the protective layer 9 , and the top end of the anti-floating anchor rod 1 is embedded in the bottom plate 10 .

[0091] The present invention forms a multi-level, multi-material waterproof system by arranging a sunken groove, a sealing ring, a bottom waterproof layer, a sealing body, a water stop ring and a top waterproof layer, which blocks the infiltration of groundwater layer by layer and has good sealing performance, and can effectively solve the leakage problem at the junction of the anti-floating anchor rod of the basement floor and the basement floor; at the same time, by arranging the sunken groove and increasing the thickness of the protective layer, a good protection effect is formed on the waterproof structure, the stability of the waterproof structure is improved, and the strength and stability of the basement structure are ensured.

[0092] The embodiments of the present invention are described in detail above, but the contents described are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A basement floor anti-floating anchor waterproof structure, characterized in that: include: An anti-floating anchor rod, wherein the anti-floating anchor rod is embedded in the anchor body; A concrete cushion layer, wherein the concrete cushion layer comprises a sinking groove, and the bottom end of the sinking groove is integrally connected to the anchor body; A sealing ring is arranged on the upper part of the anchor body and surrounds the anti-floating anchor rod; A bottom waterproof layer, covering the sealing ring and the sinking groove; A sealing body, filled in the sunken groove above the bottom waterproof layer; A water stop ring is arranged on the upper part of the sealing body and surrounds the anti-floating anchor rod; A top waterproof layer, covering the water stop ring and the bottom waterproof layer; A protective layer covering the top waterproof layer; A bottom plate is arranged above the protective layer, and the top end of the anti-floating anchor rod is buried in the bottom plate.

2. The basement floor anti-floating anchor waterproof structure according to claim 1, characterized in that: The thickness of the side wall of the sunken groove is not less than the thickness of the concrete cushion layer at other locations.

3. The basement floor anti-floating anchor waterproof structure according to claim 1 or 2, characterized in that: The sinking groove is in the shape of a tube which is larger at the top and smaller at the bottom.

4. The basement floor anti-floating anchor waterproof structure according to claim 3 is characterized by: The sealing ring is a waterproof expansion type sealing ring.

5. The basement floor anti-floating anchor rod waterproof structure according to claim 4 is characterized by: The bottom waterproof layer comprises a waterproof coating layer, which is coated on the upper part of the sealing ring and extends to the surface of the concrete cushion layer around the sinking groove.

6. The basement floor anti-floating anchor waterproof structure according to claim 5, characterized in that: The bottom waterproof layer also includes a waterproof additional layer, which is adhered to the surface of the waterproof coating layer in the sinking groove and extends to the outside of the sinking groove.

7. The basement floor anti-floating anchor waterproof structure according to claim 4, 5 or 6, characterized in that: The filling height of the sealing body is lower than the top of the sinking groove.

8. The basement floor anti-floating anchor rod waterproof structure according to claim 7, characterized in that: The top waterproof layer includes sealing asphalt and waterproofing membrane. The sealing asphalt is coated on the upper part of the water stop ring, and the waterproofing membrane is paved over a large area on the inner and outer sides of the sinking groove.

9. The basement floor anti-floating anchor rod waterproof structure according to claim 8, characterized in that: The thickness of the protective layer at a position corresponding to the sunken groove is greater than that at other positions.

10. The method for constructing the anti-floating anchor waterproof structure of the basement floor according to any one of claims 1 to 9, characterized in that: The following steps are involved: Anti-floating anchor rod construction and grouting to form anchor body; Construction of foundation cushion layer to form a sinking groove; A sealing ring is provided at the contact position between the anti-floating anchor rod and the upper surface of the anchor body; Apply waterproof coating on the inner side and the periphery of the sunken groove to form a waterproof coating layer; Laying a waterproof additional layer on the waterproof coating layer; Filling a sealing body in the sunken groove; A water stop ring is provided at the contact position between the anti-floating anchor rod and the upper surface of the sealing body; Apply sealing asphalt on the water stop ring; Laying waterproof membrane over large areas; Pouring protective layer; Cast the base slab.

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