Waterproof structure for tunnel

Abstract

The utility model discloses a waterproof structure for a tunnel, belongs to the technical field of building waterproofing, and aims at solving the problem that water leakage is easy to occur in the using process of waterproof coiled materials adopted by an existing tunnel. The waterproof structure (7) for the tunnel comprises a first cement-based permeable crystallization type waterproof coating layer (1), a polymer cement waterproof coating layer (2), a first non-woven fabric reinforcing layer (3) and a second cement-based permeable crystallization type waterproof coating layer (6) which are sequentially stacked from outside to inside. And the first non-woven fabric reinforcing layer (3) is bonded and fixed with the polymer cement waterproof coating layer (2) through the geomembrane special glue (4). According to the waterproof structure for the tunnel, the cement-based permeable crystallization type waterproof coating layer, the non-woven fabric layer, the glue special for the geomembrane and the polymer cement waterproof coating layer jointly form a waterproof layer with the three characteristics of rigidity, flexibility and toughness to replace a traditional waterproof coiled material, and it can be guaranteed that the electric power tunnel is waterproof for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of building waterproofing, in particular to a waterproofing structure for a tunnel. Background Art

[0002] The emergence of power tunnels effectively solved the problem of pipeline laying occupying ground space, and became an indispensable part of the urban pipeline system. However, the underground environment is complex, and effective waterproofing measures are a necessary prerequisite for ensuring the stable operation of pipelines. At present, power tunnels generally use waterproof membranes for waterproofing. Waterproof membranes have high requirements for the flatness of the base surface; the on-site construction is complex and the procedures are cumbersome. During the waterproofing construction, it is necessary to divide and splice multiple pieces according to the shape of the waterproof base layer; there are many overlapping parts of the waterproof membrane, and it is difficult to bond the overlapping parts. It is difficult to form a complete seal during on-site operation, and the overlapping parts have the greatest risk of leakage; the waterproof membrane leakage problem is complicated to deal with during the operation and maintenance process, and it is labor-intensive. Utility Model Content

[0003] In order to solve the problem that the existing tunnels using waterproof coiled materials are prone to water leakage during use, the utility model provides a tunnel waterproof structure. The tunnel waterproof structure is composed of a cement-based permeable crystalline waterproof coating layer, a non-woven fabric layer, a geomembrane special glue and a polymer cement waterproof coating layer to form a waterproof layer with the three characteristics of "rigidity", "flexibility" and "toughness" to replace the traditional waterproof coiled material, which can ensure long-term waterproofing of the power tunnel.

[0004] The technical solution adopted by the embodiment of the utility model to solve the technical problem is:

[0005] A waterproof structure for a tunnel, comprising a first cement-based permeable crystalline waterproof coating layer, a polymer cement waterproof coating layer, a first non-woven fabric reinforcement layer and a second cement-based permeable crystalline waterproof coating layer stacked in sequence from the outside to the inside, wherein the first non-woven fabric reinforcement layer is bonded and fixed to the polymer cement waterproof coating layer by a special adhesive for geomembranes.

[0006] The thickness of the first cement-based penetrating crystalline waterproof coating layer is 1mm-5mm.

[0007] The thickness of the polymer cement waterproof coating layer is 2mm-5mm.

[0008] The tunnel waterproof structure also includes a second non-woven fabric reinforcement layer, and the first non-woven fabric reinforcement layer, the second non-woven fabric reinforcement layer and the second cement-based permeable crystalline waterproof coating layer are stacked in sequence.

[0009] The second non-woven fabric reinforcement layer is bonded and fixed to the first non-woven fabric reinforcement layer by using a special adhesive for geomembrane.

[0010] The first non-woven fabric reinforcement layer is a layer of non-woven fabric.

[0011] The second non-woven fabric reinforcement layer is a layer of non-woven fabric.

[0012] The thickness of the second cement-based penetrating crystalline waterproof coating layer is 1mm-5mm.

[0013] The thickness of the tunnel waterproof structure is 5mm-15mm.

[0014] The beneficial effect of the embodiment of the utility model is that the waterproof structure for the tunnel is composed of a cement-based penetrating crystalline waterproof coating layer, a non-woven fabric layer, a geomembrane special glue and a polymer cement waterproof coating layer to form a waterproof layer with the three characteristics of "rigidity", "flexibility" and "toughness", which replaces the traditional waterproof membrane and can ensure long-term waterproofing of the power tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0016] Figure 1 It is a front view schematic diagram of the waterproof structure for tunnel described in the utility model.

[0017] The following are the descriptions of the reference numerals:

[0018] 1. The first cement-based penetrating crystalline waterproof coating layer; 2. The polymer cement waterproof coating layer; 3. The first non-woven fabric reinforcement layer; 4. The special glue for geomembrane; 5. The second non-woven fabric reinforcement layer; 6. The second cement-based penetrating crystalline waterproof coating layer; 7. The waterproof structure for tunnels; 8. The concrete structure; 9. The backfill soil. DETAILED DESCRIPTION

[0019] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0020] like Figure 1 As shown, a waterproof structure 7 for a tunnel described in an embodiment of the utility model includes a first cement-based penetrable crystalline waterproof coating layer 1, a polymer cement waterproof coating layer 2, a first non-woven fabric reinforcement layer 3 and a second cement-based penetrable crystalline waterproof coating layer 6 which are stacked in sequence from the outside to the inside. The first non-woven fabric reinforcement layer 3 is bonded and fixed to the polymer cement waterproof coating layer 2 by a special glue 4 for geomembranes.

[0021] The first cement-based penetrating crystalline waterproof coating layer 1 and the second cement-based penetrating crystalline waterproof coating layer 6 exhibit the characteristics of "rigidity", the first non-woven fabric reinforcement layer 3 and the geomembrane special glue 4 exhibit the characteristics of "toughness", and the polymer cement waterproof coating layer 2 exhibits the characteristics of "flexibility". The tunnel waterproof structure 7 has a waterproof layer with the three characteristics of "rigidity", "flexibility" and "toughness" instead of traditional waterproof membranes, which can ensure long-term waterproofing of power tunnels.

[0022] In this embodiment, the thickness of the first cement-based permeable crystalline waterproof coating layer 1 may be 1 mm to 5 mm, and the thickness of the polymer cement waterproof coating layer 2 may be 2 mm to 5 mm.

[0023] The tunnel waterproof structure 7 further comprises a second non-woven fabric reinforcement layer 5, wherein the first non-woven fabric reinforcement layer 3, the second non-woven fabric reinforcement layer 5 and the second cement-based permeable crystalline waterproof coating layer 6 are stacked in sequence.

[0024] like Figure 1 As shown, the second non-woven fabric reinforcement layer 5 is bonded and fixed to the first non-woven fabric reinforcement layer 3 by the geomembrane special glue 4. The first non-woven fabric reinforcement layer 3 adopts a layer of non-woven fabric. The second non-woven fabric reinforcement layer 5 also adopts a layer of non-woven fabric. The geomembrane special glue 4 and the non-woven fabric can both be existing technology products. For example, the geomembrane special glue 4 (also known as geotechnical special glue or geomembrane glue, for example, the ks geotechnical special glue produced by Dezhou Xinsheng Geotechnical Materials Co., Ltd., or the geotechnical special glue produced by Dezhou Sentai Environmental Protection Technology Co., Ltd.) can be used.

[0025] In this embodiment, the thickness of the second cement-based permeable crystallization waterproof coating layer 6 can be 1 mm to 5 mm. The thickness of the tunnel waterproof structure 7 can be 5 mm to 15 mm.

[0026] The construction method of the waterproof structure for the tunnel is described below:

[0027] Step 1: After the construction of the concrete structure 8 is completed, the inner surfaces of the top plate and the side walls are simply polished and repaired to make the inner surfaces flat, solid and basically dry.

[0028] Step 2: spray multiple layers of cement-based penetrating crystalline waterproof coating (existing technology product) on the inner surface of the treated concrete structure 8, spray evenly, and each layer of spraying needs to be surface-dried before the next layer of spraying is carried out, so that it can fully penetrate into the concrete structure to form a first cement-based penetrating crystalline waterproof coating layer 1;

[0029] Step 3: After the first cement-based permeable crystalline waterproof coating layer 1 is dried, a polymer cement waterproof coating (existing technology product) is sprayed on the first cement-based permeable crystalline waterproof coating layer 1 with a thickness of not less than 2 mm to form a polymer cement waterproof coating layer 2;

[0030] Step 4: After the polymer cement waterproof coating layer 2 is dried, a layer of non-woven fabric, namely, the first non-woven fabric reinforcement layer 3, is laid on the surface of the polymer cement waterproof coating layer 2;

[0031] Step 5: Apply geomembrane adhesive 4 on the first non-woven fabric reinforcement layer 3. Before the application is completed and before it dries, quickly lay the second layer of non-woven fabric (i.e., the second non-woven fabric reinforcement layer 5) on the first non-woven fabric reinforcement layer 3. The first non-woven fabric reinforcement layer 3 and the second non-woven fabric reinforcement layer 5 are bonded and fixed by the geomembrane adhesive 4. The first non-woven fabric reinforcement layer 3 and the second non-woven fabric reinforcement layer 5 are bonded and fixed to the polymer cement waterproof coating layer 2 by the geomembrane adhesive 4. The first non-woven fabric reinforcement layer 3, the second non-woven fabric reinforcement layer 5 and the geomembrane adhesive 4 work together to improve the tensile strength and toughness of the tunnel waterproof structure.

[0032] Step 6: Finally, two coats of cement-based penetrating crystalline waterproof coating (existing technology product) are sprayed on the second non-woven fabric reinforcement layer 5 to form a second cement-based penetrating crystalline waterproof coating layer 6. After construction, the surface integrity is checked. The non-woven fabric is tightly bonded without hollows, without leakage and without exposed base. The cement-based penetrating crystalline waterproof coating, non-woven fabric reinforcement, polymer cement waterproof coating, and geomembrane special glue together form a tunnel waterproof structure 7 with the three characteristics of "rigidity", "flexibility" and "toughness", achieving the purpose of waterproofing the power tunnel structure.

[0033] Step 7: After the tunnel waterproof structure 7 is completely dry and stable, the inner surface of the tunnel waterproof structure 7 is covered with backfill soil 9 and compacted. Figure 1 As shown, perform subsequent operations.

[0034] This construction method consists of spraying cement-based penetrating crystalline waterproof coating, laying non-woven fabric reinforcement, spraying polymer cement waterproof coating and geomembrane special glue to form a layer of tunnel waterproof structure 7, which has good integrity, reduces the traditional waterproof membrane segmentation and splicing process, and reduces the risk of water leakage at the splicing.

[0035] This construction method mainly uses spraying, which is convenient and quick to construct, has low requirements on construction technology, and workers only need simple training to achieve good construction results.

[0036] The materials required for this construction method and this construction process are green and environmentally friendly, and the waterproof coating is packed in barrels, which is convenient for transportation and on-site storage. The construction process requirements are low, and the overall waterproof effect of the tunnel waterproof structure 7 is good after the construction is completed. The tunnel waterproof structure 7 has strong applicability in special-shaped structures.

[0037] The above is only a specific embodiment of the utility model, and it cannot be used to limit the scope of the utility model. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the protection scope of the utility model should still fall within the scope of the utility model. In addition, the technical features of the utility model can be freely combined with each other, with technical features and technical solutions, with technical solutions and with embodiments.

Claims

1. A waterproof structure for a tunnel, characterized in that: The tunnel waterproof structure (7) comprises a first cement-based permeable crystalline waterproof coating layer (1), a polymer cement waterproof coating layer (2), a first non-woven fabric reinforcement layer (3) and a second cement-based permeable crystalline waterproof coating layer (6) which are stacked in sequence from the outside to the inside, and the first non-woven fabric reinforcement layer (3) is bonded and fixed to the polymer cement waterproof coating layer (2) by means of a special adhesive for geomembranes (4).

2. The waterproof structure for tunnel according to claim 1, characterized in that: The thickness of the first cement-based penetrating crystalline waterproof coating layer (1) is 1 mm to 5 mm.

3. The waterproof structure for tunnel according to claim 1, characterized in that: The thickness of the polymer cement waterproof coating layer (2) is 2 mm to 5 mm.

4. The waterproof structure for tunnel according to claim 1, characterized in that: The tunnel waterproof structure (7) further comprises a second non-woven fabric reinforcement layer (5), wherein the first non-woven fabric reinforcement layer (3), the second non-woven fabric reinforcement layer (5) and a second cement-based permeable crystalline waterproof coating layer (6) are stacked in sequence.

5. The waterproof structure for tunnel according to claim 4, characterized in that: The second non-woven fabric reinforcement layer (5) is bonded and fixed to the first non-woven fabric reinforcement layer (3) by means of a special adhesive (4) for geomembranes.

6. The waterproof structure for tunnel according to claim 1, characterized in that: The first non-woven fabric reinforcement layer (3) is a layer of non-woven fabric.

7. The waterproof structure for tunnel according to claim 4, characterized in that: The second non-woven fabric reinforcement layer (5) is a layer of non-woven fabric.

8. The waterproof structure for tunnel according to claim 1, characterized in that: The thickness of the second cement-based penetrating crystalline waterproof coating layer (6) is 1 mm to 5 mm.

9. The waterproof structure for tunnel according to claim 1, characterized in that: The thickness of the tunnel waterproof structure (7) is 5 mm to 15 mm.

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