Waterproof and moistureproof foundation
By employing a multi-layered structural design in the foundation, consisting of polymer cement-based waterproof coating, insulation layer, HDFE waterproof membrane, and perlite filling, the problem of foundation waterproofing and moisture-proofing was solved, achieving effective waterproofing, moisture-proofing, and improved stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA RAILWAY CONSTRUCTION ENGINEERING GROUP
- Filing Date
- 2025-04-08
- Publication Date
- 2026-04-17
AI Technical Summary
When the foundation is affected by groundwater and surface water, it is prone to dampness or frost heave, which can lead to wall peeling and stability problems. Existing technologies are difficult to effectively waterproof and prevent moisture.
The foundation design employs a multi-layer structure, including a first concrete cushion layer coated with polymer cement-based waterproof coating, an insulation layer, and an HDFE waterproof membrane, combined with perlite filling and a hydrophobic board to form a waterproof and moisture-proof system.
It achieves waterproof and moisture-proof effects on the foundation, prevents groundwater seepage and frost heave, and improves the stability and overall leveling of the foundation.
Smart Images

Figure CN224133804U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building engineering technology, and in particular to a waterproof and moisture-proof foundation. Background Technology
[0002] The foundation refers to the soil or rock mass beneath a building that supports its foundation. After a house is built, dampness can occur inside due to groundwater and surface water, leading to problems such as wall peeling. Subsequent repairs require significant manpower and resources. Therefore, the foundation needs to be waterproof and moisture-proof. Furthermore, in colder regions, water freezing within the soil can cause frost heave in the foundation concrete, resulting in cracks and affecting the foundation's stability. Utility Model Content
[0003] The purpose of this application is to provide a waterproof and moisture-proof foundation, which aims to solve the problems in the prior art.
[0004] This application provides a waterproof and moisture-proof foundation, including a first concrete cushion layer, the surface of which is coated with a polymer cement-based waterproof coating, an insulation layer is connected to the polymer cement-based waterproof coating, the surface of the insulation layer is wrapped with an HDFE waterproof membrane, a second concrete cushion layer is connected to the HDFE waterproof membrane, a drainage board is fixedly connected to the second concrete cushion layer, the drainage boards are connected and leveled by concrete, and a backfill soil layer is connected to the drainage boards to level the foundation as a whole.
[0005] Furthermore, the first concrete cushion layer is higher in the middle and lower around the edges, and the other covering layers on the first concrete cushion layer, except for the backfill layer, have the same shape. The backfill layer levels the foundation as a whole.
[0006] Furthermore, the first concrete cushion layer includes a steel reinforcement frame, the six sides of which are overlapped by concrete slabs, the interior of the steel reinforcement frame is filled with concrete, and the upper layer of the steel reinforcement frame is covered with concrete, so that the first concrete cushion layer achieves the shape described above.
[0007] Furthermore, the steel reinforcement frame includes two layers of steel mesh, each steel mesh comprising several transverse and longitudinal steel bars. The steel meshes are connected by steel reinforcement columns, and the transverse and longitudinal steel bars and the steel reinforcement columns are welded together to form a whole.
[0008] Furthermore, the main material of the insulation layer is foamed cement.
[0009] Furthermore, the second concrete cushion layer is filled with perlite.
[0010] The beneficial effects of this utility model are as follows: the first concrete cushion layer provides strong support and stability to the foundation; the polymer cement-based waterproof coating prevents groundwater from seeping upwards; the insulation layer prevents the concrete cushion layer from freezing and swelling; the HDFE waterproof membrane further prevents groundwater from seeping upwards; perlite is filled in the second concrete cushion layer to prevent freezing and swelling and cracking; and a drainage board is installed to drain surface water. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0012] In the picture:
[0013] 1-First concrete cushion layer; 2-Polymer cement-based waterproof coating; 3-Insulation layer; 4-HDFE waterproof membrane; 5-Second concrete cushion layer; 6-Drainage board; 7-Backfill layer; 8-Reinforced frame; 9-Concrete slab; 10-Perlite. Detailed Implementation
[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0015] like Figure 1 The illustrated waterproof and moisture-proof foundation includes a first concrete cushion layer 1, which provides strong support and stability to the foundation. The surface of the first concrete cushion layer 1 is coated with a polymer cement-based waterproof coating 2 to prevent groundwater seepage. An insulation layer 3 is connected to the polymer cement-based waterproof coating 2 to prevent frost heave of the concrete cushion layer. An HDFE waterproof membrane 4 is wrapped around the surface of the insulation layer 3 to further prevent groundwater seepage. A second concrete cushion layer 5 is connected to the HDFE waterproof membrane 4, and a drainage board 6 is fixedly connected to the second concrete cushion layer 5 to drain surface water. The drainage boards 6 are connected and leveled by concrete, and a backfill soil layer 7 is connected to the drainage boards 6 to level the entire foundation.
[0016] The first concrete cushion layer 1 is high in the middle and low around the edges, and the other covering layers on the first concrete cushion layer 1, except for the backfill soil layer 7, have the same shape. The backfill soil layer 7 levels the foundation as a whole, and this structure can prevent water accumulation inside the foundation.
[0017] The first concrete foundation 1 includes a steel frame 8, the six sides of which are overlapped by concrete slabs 9. The interior of the steel frame 8 is filled with concrete, and the upper layer of the steel frame 8 is covered with concrete, so that the first concrete foundation 1 achieves the shape described above.
[0018] The steel frame 8 includes two layers of steel mesh, each steel mesh consisting of several transverse and longitudinal steel bars. The steel meshes are connected by steel column supports, and the transverse and longitudinal steel bars and steel column are welded together to form a whole.
[0019] The main material of the insulation layer 3 is foamed cement.
[0020] The second concrete cushion layer 5 is filled with perlite 10. By filling the second concrete cushion layer 5 with perlite 10, it is prevented from cracking due to frost heave.
[0021] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A waterproof and moisture-proof foundation, characterized in that, The system includes a first concrete cushion layer, the surface of which is coated with a polymer cement-based waterproof coating. An insulation layer is attached to the polymer cement-based waterproof coating. An HDFE waterproof membrane is wrapped around the surface of the insulation layer. A second concrete cushion layer is attached to the HDFE waterproof membrane. A drainage board is fixedly attached to the second concrete cushion layer. The drainage boards are connected and leveled by concrete. A backfill soil layer is attached to the drainage boards.
2. A waterproof and moisture-proof foundation according to claim 1, characterized in that, The first concrete cushion layer is high in the middle and low around the edges, and the other covering layers on the first concrete cushion layer, except for the backfill layer, have the same shape. The backfill layer levels the foundation as a whole.
3. A waterproof and moisture-proof foundation according to claim 2, characterized in that, The first concrete cushion layer includes a steel reinforcement frame, the six sides of which are overlapped by concrete slabs. The interior of the steel reinforcement frame is filled with concrete, and the upper layer of the steel reinforcement frame is covered with concrete, so that the first concrete cushion layer achieves the above-mentioned shape.
4. A waterproof and moisture-proof foundation according to claim 3, characterized in that, The steel frame includes two layers of steel mesh, each steel mesh consisting of several transverse and longitudinal steel bars. The steel meshes are connected by steel column supports, and the transverse and longitudinal steel bars and steel column are welded together to form a whole.
5. The waterproof and moisture-proof foundation according to claim 1, characterized in that, The main material of the insulation layer is foamed cement.
6. The waterproof and moisture-proof foundation according to claim 1, characterized in that, The second concrete cushion layer is filled with perlite.