阅读说明：本技术 一种有砟轨道钢桥面防水防腐系统的施工方法 (Construction method of ballast track steel bridge deck waterproof and anticorrosion system ) 是由 任万敏 王亮 马雅林 于 2021-08-31 设计创作，主要内容包括：本发明公开了一种有砟轨道钢桥面防水防腐系统的施工方法,包括以下步骤：S1、对钢桥面基面进行抛丸除锈处理,清洁,刷涂底漆,养护,形成底漆层；S2、使用双组份无气喷涂泵在所述底漆层上喷涂Eliminator防水材料,养护,形成第一防水层；在第一防水层上喷涂Eliminator防水材料,养护,形成第二防水层。本发明制备的防水防腐系统耐久性强、抗穿刺能力强、抗道砟反复碾压、耐磨性极好同时兼顾防水防水性能突出,可以直接经过简单保护或直接在防水层上铺设道砟,再安装枕木及轨道,材料施工效率非常高,防水防腐系统固化速度非常快,损坏位置非常易于修复,减少了上层保护层从而达到减轻桥梁结构荷载的同时兼顾了桥梁施工进度及减低后期维护难度。(The invention discloses a construction method of a ballast track steel bridge deck waterproof and anticorrosive system, which comprises the following steps: s1, performing shot blasting rust removal treatment on the steel bridge deck base surface, cleaning, brushing primer, and maintaining to form a primer layer; s2, spraying an Eliminator waterproof material on the primer layer by using a two-component airless spraying pump, and curing to form a first waterproof layer; and spraying an Eliminator waterproof material on the first waterproof layer, and curing to form a second waterproof layer. The waterproof and anticorrosive system prepared by the invention has strong durability, strong puncture resistance, repeated rolling of ballast resistance, excellent wear resistance and outstanding waterproof performance, can be directly and simply protected or directly paved with the ballast on a waterproof layer, and then installed with sleepers and tracks, has very high material construction efficiency, very high curing speed of the waterproof and anticorrosive system, very easy repair of damaged positions, and reduction of an upper protective layer, thereby reducing the load of a bridge structure, simultaneously considering the bridge construction progress and reducing the difficulty of later maintenance.)

1. A construction method of a ballast track steel bridge deck waterproof and anticorrosion system is characterized by comprising the following steps:

s1, performing shot blasting and rust removing treatment on the steel bridge deck base surface, cleaning, and brushing primer with the dosage of 150-200 g/m²Curing for 0.5-1.0h to form a primer layer;

s2, spraying an Eliminator waterproof material on the primer layer by using a two-component airless spraying pump, and curing for 0.5-1.5 hours to form a first waterproof layer; and spraying an Eliminator waterproof material on the first waterproof layer, and curing for 0.5-1.5 h to form a second waterproof layer.

2. The construction method of the ballast track steel bridge deck waterproof and anticorrosive system according to claim 1, wherein in step S1, the cleanliness after treatment reaches ISO8501-1:2007Sa 2.5 grade, and the surface roughness after shot blasting is 50-120 μm.

3. The construction method of the ballast track steel bridge deck waterproof and anticorrosive system according to claim 1, wherein the primer layer has a thickness of 50-75 μm.

4. The construction method of the ballast track steel bridge floor waterproof and anticorrosion system according to claim 3, wherein the primer is Zed S94 acrylic acid metal anticorrosion primer.

5. The construction method of the ballast track steel bridge deck waterproof and anticorrosion system according to claim 1, wherein in step S1, after the primer is cured, whether the primer has a coating omission position or not and the thickness of the primer layer are checked.

6. The construction method of the ballast track steel bridge deck waterproof and anticorrosion system according to claim 1, wherein the thickness of the first waterproof layer is 1.5-3 mm, the thickness of the second waterproof layer is 1.5-2.5 mm, and the total thickness of the first waterproof layer and the second waterproof layer is 3-5 mm.

7. The construction method of the ballast track steel bridge deck waterproof and anticorrosion system according to claim 1, wherein in step S2, the amount of each waterproof layer is not less than 2100g/m when the first waterproof layer and the second waterproof layer are constructed²(ii) a After the Eliminator waterproof material is sprayed, the thickness of the wet film of each layer is detected to be not less than 1.8 mm.

8. The construction method of the ballast track steel bridge deck waterproof and anticorrosive system according to claim 1, wherein in step S2, after the second waterproof layer is formed, a high-pressure electric spark leak detector is used to detect air holes in the waterproof layer, the detected air hole positions are marked, then Eliminator waterproof material with the thickness not less than 1.0mm is manually scraped at the air hole positions, and after the material is cured, the high-pressure electric spark leak detector is used to detect whether the material is qualified.

9. The construction method of the ballast track steel bridge deck waterproof and anticorrosion system according to any one of claims 1 to 8, wherein the waterproof and anticorrosion system further comprises a non-woven fabric layer for buffering the impact of ballast on a waterproof layer; the construction steps of the non-woven fabric layer are as follows:

and S3, paving a non-woven fabric on the surface of the second waterproof layer to form the non-woven fabric layer.

10. The construction method of the ballast track steel bridge floor waterproof and anticorrosive system according to claim 9, wherein the thickness of the non-woven fabric layer is 4-7 mm.

Technical Field

The invention relates to the field of bridge deck construction, in particular to a construction method of a ballast track steel bridge deck waterproof and anticorrosion system.

Background

At present, before a steel bridge deck track laying project of a ballast track or a ballastless track, a general method is to construct a reaction type polymer waterproof layer after surface treatment of a bridge deck base surface, then pour concrete or asphalt concrete as a protective layer, then lay ballast, sleepers and track installation, and the current technical method has the following defects: firstly, the requirement on the bearing of the bridge is high, and no matter the concrete protective layer or the asphalt concrete protective layer needs to be laid to a certain thickness, so that the load of the structure is increased; secondly, the construction period is longer, and the construction equipment requirement is higher because concrete pouring and maintenance are involved; thirdly, when the protective layer is damaged, the exposed waterproof layer is easy to leak due to insufficient durability, and water, air, salt and pollutants enter the base plane of the bridge deck to cause the structure to start to be corroded, so that the durability of the structure is influenced; and fourthly, the maintenance time is longer after the protective layer is damaged, and the line operation capacity is possibly reduced.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a construction method of a ballast track steel bridge deck waterproof and anticorrosive system.

In order to achieve the above purpose, the invention provides the following technical scheme:

a construction method of a ballast track steel bridge deck waterproof and anticorrosion system comprises the following steps:

s1, performing shot blasting and rust removing treatment on the steel bridge deck base surface, cleaning, and brushing primer with the dosage of 150-200 g/m²Curing for 0.5-1.0h to form a primer layer;

s2, spraying an Eliminator waterproof material on the primer layer by using a two-component airless spraying pump, and curing for 0.5-1.5 hours to form a first waterproof layer; and spraying an Eliminator waterproof material on the first waterproof layer, and curing for 0.5-1.5 h to form a second waterproof layer.

The construction method comprises the steps of constructing a primer layer on a steel bridge floor base surface, and spraying a waterproof layer, wherein the waterproof layer comprises a first waterproof layer and a second waterproof layer to form a waterproof and anticorrosive system, the prepared waterproof and anticorrosive system is strong in durability, strong in puncture resistance, resistant to repeated rolling of ballast, excellent in wear resistance and outstanding in waterproof and waterproof performance, the ballast can be directly paved on the waterproof layer, and then sleepers and tracks are installed.

As a preferable scheme of the invention, in step S1, the cleanliness after treatment reaches ISO8501-1:2007 Sa2.5 grade, and the surface roughness after shot blasting and rust removal is 50-120 μm.

In a preferable embodiment of the present invention, the primer layer has a thickness of 50 to 75 μm. The surface of the steel bridge deck is smooth, large transverse shear stress is borne between the pavement layer and the steel bridge base surface, the pavement is easy to delaminate and slide, the requirement on the shearing resistance of the waterproof layer and the steel bridge base surface is high, and the primer is arranged to enhance the bonding between the waterproof layer and the steel bridge base surface. In the invention, the bonding strength of the primer layer and the steel bridge surface base surface is not less than 5.0 MPa.

As a preferable scheme of the invention, the primer is Zed S94 acrylic resin metal anticorrosion primer. The acrylic acid anticorrosive primer has the functions of protecting the steel plate subjected to shot blasting and rust removal from being corroded and improving the bonding strength between the steel plate base surface and the Eliminator waterproof material.

As a preferable aspect of the present invention, after the primer is cured in step S1, the primer is inspected for a missing coating position and the thickness of the primer layer is inspected.

According to the preferable scheme of the invention, the thickness of the first waterproof layer is 1.5-3 mm, the thickness of the second waterproof layer is 1.5-2.5 mm, and the total thickness of the first waterproof layer and the second waterproof layer is 3-5 mm. More preferably, the total thickness of the first waterproof layer and the second waterproof layer is 3.5-4.5 mm.

In a preferred embodiment of the present invention, in step S2, the amount of each waterproof layer used in the construction of the first waterproof layer and the second waterproof layer is not less than 2100g/m²(ii) a After spraying the Eliminator waterproof material, the Wet Film Thickness (WFT) of each layer is detected to be not less than 1.8 mm.

In a preferred embodiment of the present invention, in step S2, after the second waterproof layer is formed, the high-pressure electric spark leak detector is used to detect air holes in the waterproof layer, the positions of the detected air holes are marked, then the Eliminator waterproof material with a thickness of not less than 1.0mm is manually scraped at the positions of the air holes, and after curing, the high-pressure electric spark leak detector is used to detect whether the waterproof layer is qualified or not.

As a preferable scheme of the invention, the waterproof and anticorrosive system further comprises a non-woven fabric layer, and the non-woven fabric layer can buffer impact of railway ballast on the waterproof layer when the railway ballast is laid, resist impact and friction of railway ballast, sleepers and the like on the waterproof film when a locomotive runs, and play a dual protection role. The construction method of the non-woven fabric layer comprises the following steps:

and S3, paving a non-woven fabric on the surface of the second waterproof layer to form the non-woven fabric layer.

In a preferred embodiment of the present invention, the thickness of the nonwoven fabric layer is 4 to 7 mm.

Compared with the prior art, the invention has the beneficial effects that:

1. the waterproof and anticorrosive system prepared by the construction method has unique durability, can resist thermal aging and ultraviolet aging, has strong permeability resistance, and can continuously protect a bridge structure from being corroded; the waterproof layer has good tensile strength and can be firmly bonded with the steel plate base surface; the waterproof layer has good puncture resistance, ballast rolling resistance and impact resistance, and good wear resistance, i.e. no additional asphalt pavement or concrete pavement protective layer is needed, and the pavement protective layer set by the common method is reduced from the construction method by using the material characteristics, so that the structural level is simplified, the structural load is reduced, and the engineering construction cost is saved.

2. The construction method of the invention uses a mechanized spraying construction mode, has rapid construction and high construction efficiency, can construct 2000 square meters per day for a single team, is not influenced by damp environment, can be rapidly solidified in low temperature environment, and is suitable for all-around construction.

3. The optimized process method of the invention improves the construction efficiency, shortens the construction time, simplifies the construction process, is very simple and convenient for later maintenance, only needs to check and maintain the waterproof layer, simultaneously exerts the quick setting characteristic of the waterproof material, shortens the maintenance time, does not need to dig and recover the asphalt pavement/concrete pavement protective layer, and reduces the maintenance operation pressure to the minimum.

Description of the drawings:

FIG. 1 is a schematic structural view of a water-proofing and corrosion-preventing system for a steel bridge deck in example 1;

FIG. 2 is a schematic structural view of a water-proofing and corrosion-preventing system for a steel bridge deck in example 2;

FIG. 3 is a water and corrosion resistant system after a puncture resistance test;

FIG. 4 is a waterproof layer after a puncture resistance test;

the labels in the figure are: 1-a steel bridge deck, 2-a primer layer, 3-a first waterproof layer, 4-a second waterproof layer, 5-a ballast and 6-a non-woven fabric layer.

Detailed Description

The present invention will be described in further detail with reference to test examples and specific embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.

Example 1

A construction method of a ballast track steel bridge deck waterproof and anticorrosion system comprises the following steps:

s1, performing shot blasting rust removal treatment and cleaning on the steel bridge deck base surface, wherein the cleanliness reaches ISO8501-1:2007Sa 2.5 grade after treatment, the surface roughness is 50-120 micrometers after shot blasting rust removal, and coating Zed S94 acrylic resin metal anticorrosion primer with the dosage of 150-200 g/m²Curing at 23 ℃ for 0.5-1.0h, and checking that the primer isWhether a coating missing position exists or not and checking that the thickness of a paint film is not less than 50 mu m to form a primer layer;

s2, spraying an Eliminator waterproof material on the primer layer by using a two-component airless spraying pump, and curing at 23 ℃ for 0.5-1.5 h to form a first waterproof layer; and spraying an Eliminator waterproof material on the first waterproof layer, and curing for 0.5-1.5 h at 23 ℃ to form a second waterproof layer. After the waterproof layer is constructed, paving the ballast with the thickness of not less than 300mm, and then installing sleepers and rails.

The prepared waterproof and anticorrosive system is shown in figure 1, and the thickness of the primer layer is 50-75 mu m. In the embodiment, the Eliminator waterproof material mainly adopts Methyl Methacrylate (MMA) resin and is divided into a component A and a component B; the thickness of the first waterproof layer is 1.8mm, the thickness of the second waterproof layer is 1.5mm, and in step S2, the using amount of each waterproof layer is not less than 2100g/m²After the construction, the Wet Film Thickness (WFT) of each layer was measured to be not less than 1.8 mm. And after the first waterproof layer and the second waterproof layer are constructed, detecting that the total thickness of the waterproof layer is not less than 3mm by using a dry film thickness gauge.

And after a second waterproof layer is formed, detecting air holes in the waterproof layer by using a high-voltage electric spark leak detector, marking the positions of the detected air holes, manually blade-coating an Eliminator waterproof material with the thickness not less than 1.0mm at the positions of the air holes, and detecting whether the waterproof material is qualified or not by using the high-voltage electric spark leak detector after the waterproof material is solidified.

Example 2

The embodiment provides a construction method of a ballast track steel bridge deck waterproof and anticorrosion system, which is similar to that in embodiment 1, and is different in that the waterproof and anticorrosion system further includes a non-woven fabric layer, as shown in fig. 2, the construction method of the non-woven fabric layer includes:

and S3, paving non-woven fabrics on the surface of the second waterproof layer, and fully paving the non-woven fabrics when the non-woven fabrics are required to be paved, wherein the lapping of 5-10 cm is guaranteed between the non-woven fabrics, so that a complete non-woven fabric layer is formed.

Wherein, the thickness of the non-woven fabrics layer is 5 mm.

The performance test of the Eliminator waterproof material is carried out, and the test results are shown in the following table 1. Meanwhile, the puncture resistance of the waterproof and anticorrosive system obtained by the construction of the embodiment 2 is further tested, a railway ballast is paved on the waterproof and anticorrosive system in the testing process, the minimum force exerted on the railway ballast is 41kN, the maximum force exerted on the railway ballast is 125kN, the frequency is 5Hz, and the condition of the waterproof and anticorrosive system is detected after the testing is finished.

As can be seen from fig. 3 and 4, the non-woven fabric layer has some very obvious marks, the waterproof and anticorrosive system has slight ballast traces, and by means of the research of the amplifying device, the waterproof system has no perforation, and no perforation is observed through the transparency test, which indicates that the waterproof layer has good puncture resistance and good ballast rolling resistance, and no additional asphalt pavement or concrete pavement protective layer is needed.

TABLE 1 Eliminator Water-proof Material Performance test

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.