Bridge sidewalk waterproof layer structure and construction method thereof

Abstract

The invention discloses a bridge sidewalk waterproof layer structure and a construction method thereof, and belongs to the technical field of building construction.The bridge sidewalk waterproof layer structure comprises a sidewalk pavement layer, and a sidewalk waterproof layer is arranged above the sidewalk pavement layer; a drainage pipeline is arranged on the side, close to the handrail foundation base, of the sidewalk waterproof layer, the drainage pipeline is pre-buried at the bottom of the handrail foundation, and the handrail foundation base is arranged above the drainage pipeline; a drainage blind pipe is arranged on the side, close to the drainage pipeline, of the handrail foundation base, a drainage sand cushion layer is arranged above the sidewalk waterproof layer and the drainage blind pipe, and a sidewalk surface layer is arranged above the drainage sand cushion layer, so that the strength of the sidewalk structure is guaranteed, the drainage effect of the sidewalk structure is greatly improved, and the service life of the sidewalk structure is prolonged. Therefore, accumulated water in the sidewalk structure layer can be drained in time, damage caused by accumulated water is avoided, the waterproof quality of a bridge is improved, and the water seepage rate of the bridge floor is reduced. And the problems of later secondary repair, decoration and the like are reduced.

Description

Technical Field

[0001] The technical solution belongs to the field of building equipment construction, specifically a bridge sidewalk waterproof layer structure and a construction method thereof. Background Art

[0002] In the waterproofing project of a simply supported beam bridge, the traditional practice is to lay a waterproof layer on top of the pavement layer of the carriageway. The sidewalk drains water through the cross slope of the road surface, and the water is discharged by the drainage pipe of the carriageway. However, in the process of realizing the embodiment of the present application, the inventor found that this method did not set a waterproof layer at the bottom of the sidewalk structure, resulting in that in seasons with heavy rainfall, the accumulated water after the sidewalk seepage has nowhere to be quickly discharged, resulting in the inability to discharge the seepage water in time, forming water accumulation, which seriously affects the durability of the bridge. Due to the shrinkage and creep of concrete, cracks are prone to occur in the hinges, joints and other parts of the bridge, making it easier for water to penetrate. Because of this, the accumulated water in the sidewalk structure layer leaks through the cracks, causing long-term erosion of the bridge concrete and steel bars, which will further reduce the structural strength and stability. Summary of the invention

[0003] In order to solve the above technical problems, the present invention discloses the following technical solutions: A bridge sidewalk waterproof layer structure: including; Sidewalk pavement layer: a sidewalk waterproof layer is provided above the sidewalk pavement layer; a drainage pipe is provided on the side of the sidewalk waterproof layer close to the railing foundation base, the drainage pipe is pre-buried in the bottom of the railing foundation, and a railing foundation base is provided above the drainage pipe; a drainage blind pipe is provided on the side of the railing foundation base close to the drainage pipe, a drainage sand cushion layer is provided above the sidewalk waterproof layer and the drainage blind pipe, and a sidewalk surface layer is provided above the drainage sand cushion layer.

[0004] A construction method for a bridge sidewalk waterproof layer structure, comprising: Pre-buried drainage pipes at the bottom of the railing foundation at the end of the longitudinal slope of each span of the bridge; Construction of sidewalk waterproofing layer on the sidewalk pavement layer; Install drainage blind pipe above the sidewalk waterproof layer near the base of the handrail foundation; A drainage sand cushion layer is constructed above the sidewalk waterproof layer and the drainage blind pipe, and the specific steps are as follows: The drainage sand cushion layer is constructed by paving with medium-coarse sand; After paving, fill the drainage sand cushion layer with water in sections and compact it, and vibrate it to compact it when it reaches saturation; The sidewalk surface layer is constructed above the drainage sand cushion layer.

[0005] Furthermore, before pre-burying the drainage pipe, the working surface of the railing foundation is roughened to clean the surface dust and debris to ensure the bonding strength of the subsequent structure.

[0006] Furthermore, the diameter and length of the drainage pipe match the basic dimensions of the railing, the water inlet of the drainage pipe is 1 to 2 cm below the working surface, and the water outlet is exposed for at least 10 cm.

[0007] Furthermore, the drainage pipe is a galvanized pipe.

[0008] Furthermore, after the drainage pipe is pre-buried, the railing foundation is made by installing the template and pouring concrete, that is, installing the structural template and pouring concrete, and after the concrete reaches the initial setting strength, curing is carried out.

[0009] Furthermore, the construction steps of the sidewalk waterproof layer are as follows: Clean the base surface for laying the waterproof layer; Apply the first layer of waterproof coating evenly on the base surface; Before the first layer of waterproof coating is completely dry, lay the geotextile on it and remove the bubbles under the geotextile; Apply a second layer of waterproof coating on the geotextile; Lay the second layer of geotextile on the second layer of waterproof coating and drive out the bubbles under the geotextile; Apply the third layer of waterproof coating on the second layer of geotextile; On the basis of the third layer of waterproof coating, apply multiple layers of waterproof coating in sequence until more than five layers are completed; Furthermore, the geotextile should be paved 15cm higher than the bottom surface of the railing foundation, with a longitudinal overlap width of 15cm and a transverse overlap width of not less than 30cm. The overlap positions of the upper and lower layers should be staggered, the coating height of the waterproof asphalt coating should be 30cm higher than the bottom of the railing foundation, and the number of layers of the waterproof coating should be more than 5.

[0010] Furthermore, the preparation steps of the drainage blind pipe are as follows: Spread the geotextile flat, wrap it with clean gravel, and roll it into a long cylindrical drainage blind pipe.

[0011] Furthermore, the drainage blind pipe is a drainage blind pipe that is paved flat with a geotextile of about 0.5 m, wrapped with clean gravel, and rolled into a long cylindrical structure.

[0012] Compared with the prior art, the present invention has the following outstanding beneficial effects: The present invention effectively intercepts water seepage from the sidewalk by providing a waterproof layer, thereby preventing water from leaking to the bottom of the bridge.

[0013] The structure of the sidewalk of the present invention not only ensures its strength, but also greatly improves its water-repellent effect, so as to ensure that the accumulated water in the sidewalk structure layer can be discharged in time, avoid the damage caused by the accumulation of water, improve the waterproof quality of the bridge, reduce the water seepage rate of the bridge surface, and reduce the problems of secondary repair and decoration in the later stage.

[0014] The design scheme of the present invention aims at low cost, reducing construction cost, and at the same time improving waterproof effect and ensuring long-term durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the process flow chart of this application; Figure 2 is a cross-sectional view of the present application; Figure 3 It is a schematic diagram of the structure of this application; Among them: 1. Drainage pipes, 2. Sidewalk waterproofing layer, 3. Drainage blind pipes, 4. Railing foundation base, 5. Drainage sand cushion layer, A. Sidewalk pavement layer, B. Sidewalk surface layer.

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work. DETAILED DESCRIPTION

[0017] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0018] Example 1: Further analysis and expansion of this structure: A bridge sidewalk waterproof layer 2 structure: including, Sidewalk pavement layer A: A sidewalk waterproof layer 2 is provided above the sidewalk pavement layer A; a drainage pipe 1 is provided on the side of the sidewalk waterproof layer 2 close to the railing foundation base 4, and the drainage pipe 1 is pre-buried in the bottom of the railing foundation, and a railing foundation base 4 is provided above the drainage pipe 1; a drainage blind pipe 3 is provided on the side of the railing foundation base 4 close to the drainage pipe 1, a drainage sand cushion layer 5 is provided above the sidewalk waterproof layer 2 and the drainage blind pipe 3, and a sidewalk surface layer B is provided above the drainage sand cushion layer 5.

[0019] Embodiment 2: A construction method for a bridge sidewalk waterproof layer 2 structure, the specific steps are as follows: Handling of the basic working surface of the railing: Chisel the working surface of the railing foundation to ensure a rough surface and enhance the bonding strength between the concrete and the foundation; Clean the dust and debris on the surface to ensure no pollution; Drainage pipe 1 installation: Several drainage pipes 1 are pre-buried at the bottom of the railing foundation at the end of each span of the longitudinal slope of the bridge. The pipe diameter and length match the size of the railing foundation. The water inlet is 1-2 cm below the working surface, and the water outlet is exposed at least 10 cm. Use galvanized pipes as drain pipes to ensure durability; Pouring concrete: After the drainage pipe 1 is pre-buried, the formwork is installed and concrete is poured to make the railing foundation.

[0020] After the concrete reaches the initial setting strength, proper curing should be carried out; The construction steps of the sidewalk waterproof layer 2 are as follows: Clean the base surface for laying the waterproof layer to ensure that there is no debris and dust; Apply the first layer of waterproof coating evenly on the base surface to ensure uniform coating thickness; Before the first layer of paint is completely dry, lay the geotextile and remove the bubbles under the geotextile; Apply a second layer of waterproof coating on the geotextile; Before the second layer of paint is completely dry, lay the geotextile and remove the bubbles under the geotextile; Apply the third layer of waterproof coating on the second layer of geotextile; On the basis of the third layer of waterproof coating, apply multiple layers of waterproof coating in sequence until more than five layers are completed; The requirements for geotextile overlap are as follows: The geotextile should be 15cm higher than the bottom surface of the railing foundation, with a longitudinal overlap width of 15cm and a transverse overlap width of not less than 30cm. The overlap positions of the upper and lower layers should be staggered.

[0021] The waterproof coating should be applied 30cm above the bottom of the railing foundation.

[0022] Installation of drainage blind pipe 3: Spread the geotextile with a thickness of about 0.5 m flat, wrap it with clean gravel, and roll it into a long cylindrical structure as a drainage blind pipe 3.

[0023] A drainage blind pipe 3 is installed above the sidewalk waterproof layer 2 and close to the side of the railing foundation base 4.

[0024] Drainage sand cushion 5 construction Use medium-coarse sand for paving to ensure uniform thickness.

[0025] After paving, the drainage sand cushion layer 5 is divided and filled with water in sections. After it reaches the saturated state, it is vibrated and compacted to ensure drainage performance.

[0026] Sidewalk surface B construction The sidewalk surface layer B is constructed above the drainage sand cushion layer 5 to ensure the stability and durability of the surface layer.

[0027] In addition, the invention also discloses the following technical solutions based on the above embodiments: The drainage blind pipe 3 can also be replaced by a plastic blind pipe. The plastic blind pipe is hydrophobic and has low resistance. It has extremely high surface water permeability and internal water permeability. Although it has a good drainage effect, it is expensive and will affect the stability of its structure. Therefore, the inventor uses a long cylindrical shape made of crushed stones wrapped by geotextile as the drainage blind pipe 3, which has the advantages of low cost and high stability.

[0028] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A bridge sidewalk waterproof layer structure, characterized in that: include; Sidewalk pavement layer: a sidewalk waterproof layer is provided above the sidewalk pavement layer; a drainage pipe is provided on the side of the sidewalk waterproof layer close to the railing foundation base, the drainage pipe is pre-buried in the bottom of the railing foundation, and a railing foundation base is provided above the drainage pipe; a drainage blind pipe is provided on the side of the railing foundation base close to the drainage pipe, a drainage sand cushion layer is provided above the sidewalk waterproof layer and the drainage blind pipe, and a sidewalk surface layer is laid above the drainage sand cushion layer.

2. A construction method for a bridge sidewalk waterproof layer structure, characterized in that: include; Pre-buried drainage pipes at the bottom of the railing foundation at the end of the longitudinal slope of each span of the bridge; Construction of sidewalk waterproofing layer on the sidewalk pavement layer; Install drainage blind pipe above the sidewalk waterproof layer near the base of the handrail foundation; A drainage sand cushion layer is constructed above the sidewalk waterproof layer and the drainage blind pipe, and the specific steps are as follows: The drainage sand cushion layer is constructed by paving with medium-coarse sand; After paving, fill the drainage sand cushion layer with water in sections and compact it, and vibrate it to compact it when it reaches saturation; The sidewalk surface layer is constructed above the drainage sand cushion layer.

3. The construction method of a bridge sidewalk waterproof layer structure according to claim 2 is characterized by: The railing foundation working surface is roughened before pre-burying the drainage pipe.

4. The construction method of a bridge sidewalk waterproof layer structure according to claim 3 is characterized by: The water inlet of the drainage pipe is 1-2 cm below the working surface, and the water outlet is exposed at least 10 cm.

5. The construction method of a bridge sidewalk waterproof layer structure according to any one of claims 2 to 4, characterized in that: The drainage pipe is a galvanized pipe.

6. The construction method of a bridge sidewalk waterproof layer structure according to claim 2, characterized in that: After the drainage pipe is pre-buried, it is installed through a template and concrete is poured to form a railing foundation.

7. The construction method of a bridge sidewalk waterproof layer structure according to claim 2, characterized in that: The construction steps of the sidewalk waterproof layer are as follows: Clean the base surface for laying the waterproof layer; Apply the first layer of waterproof coating evenly on the base surface; Before the first layer of waterproof coating is completely dry, lay the geotextile on it and remove the bubbles under the geotextile; Apply a second layer of waterproof coating on the geotextile; Lay the second layer of geotextile on the second layer of waterproof coating and drive out the bubbles under the geotextile; Apply the third layer of waterproof coating on the second layer of geotextile; On the basis of the third layer of waterproof coating, apply multiple layers of waterproof coating in sequence until more than five layers are completed.

8. The construction method of a bridge sidewalk waterproof layer structure according to claim 7, characterized in that: The geotextile should be paved 15cm higher than the bottom surface of the railing foundation, with a longitudinal overlap width of 15cm and a transverse overlap width of no less than 30cm. The overlap positions of the upper and lower layers should be staggered, the coating height of the waterproof asphalt coating should be 30cm higher than the bottom of the railing foundation, and the number of layers of the waterproof coating should be more than 5.

9. The construction method of a bridge sidewalk waterproof layer structure according to claim 2, characterized in that: The preparation steps of the drainage blind pipe are as follows: Spread the geotextile flat, wrap it with clean gravel, and roll it into a long cylindrical drainage blind pipe.

10. The construction method of a bridge sidewalk waterproof layer structure according to claim 2, characterized in that: The drainage blind pipe is a drainage blind pipe which is paved flat with a geotextile of about 0.5 m, wrapped with clean gravel, and rolled into a long cylindrical structure.

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