Anti-corrosion and anti-seepage construction method for bridge anti-collision wall for road maintenance

Abstract

The invention relates to the technical field of road maintenance, in particular to an anti-corrosion and anti-seepage construction method of a bridge anti-collision wall for road maintenance, which comprises the following steps: during bridge asphalt felt construction, cutting asphalt felt into a strip with the width of 40cm, heating and softening the asphalt felt by using a blast lamp and other heating tools, and adhering the asphalt felt to a cleaned pitted surface at the lower part of the anti-collision wall; the adhesion height is about 30 cm, meanwhile, after the joint of the anti-collision wall and the bridge deck is cleaned, the asphalt felt is adhered to a bridge deck pavement layer by 10 cm, the adhered part is subjected to secondary heating after adhesion, firm and dense adhesion is ensured, and water, snow and a snow melting agent are completely prevented from invading the anti-collision wall and a gap in the lower portion of the anti-collision wall by means of the waterproof and anti-corrosion characteristics of the asphalt felt; and corrosion to the anti-collision wall and infiltration of bridge floor water are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of highway maintenance, and in particular to an anti-corrosion and anti-seepage construction method for a bridge crash wall used for highway maintenance. Background Art

[0002] In northern my country, the temperature difference is large throughout the year, and snowfall is frequent in winter. The use of snow-melting agents in snow removal and traffic maintenance work causes serious corrosion to the concrete of bridge crash barriers. Large areas of concrete at the bottom of the bridge crash barriers show pitting, peeling and exposed reinforcement diseases. The cracks and defects between the crash wall and the bridge deck pavement can easily lead to water from the bridge deck seeping into the beam body, causing water seepage and alkali flooding in the beam body, which can seriously cause cracks in the beam body, concrete peeling and exposed reinforcement diseases, affecting the overall operation safety of the bridge.

[0003] At present, the main maintenance method to solve the rough surface of bridge crash barriers is to remove rust and then apply an anti-corrosion coating on the surface of the crash barriers to isolate the steel bars and internal structures from water. This method has cumbersome construction work and a long construction period.

[0004] This scheme provides an anti-corrosion and anti-seepage construction method for bridge crash barriers for highway maintenance. Oil felt is used as the anti-corrosion and anti-seepage material, which is affixed to the bottom of the crash wall and the joints between the crash wall and the bridge deck pavement (with reserved drainage holes). It can effectively block the erosion of water, snow and snow-melting agents. The construction operation is simple, the capital investment is small, and the oil felt has a minimum validity period of 3 years. Summary of the invention

[0005] The present invention aims to at least solve the problem that the method of coating the bridge crash wall in the prior art has large investment and poor maintenance effect.

[0006] This scheme provides a method for anti-corrosion and anti-seepage construction of a bridge crash wall for highway maintenance, comprising the following steps:

[0007] Step 1: Cut the oil felt:

[0008] Use scissors and other cutting tools to cut the oil felt into long strips, and adjust the length as needed;

[0009] Step 2: Clean the surface of the anti-collision wall:

[0010] Use high-pressure water guns and other cleaning tools to clean the crash barrier to remove all loose concrete and dust on the surface of the crash barrier, which is conducive to the subsequent pasting of oil felt; for crash barriers with exposed steel bars, rust removal can be performed on the exposed steel bars;

[0011] Step 3: Heat the oil felt on one side:

[0012] Use a hot torch or other heating tools to heat and soften the oil felt, and then fit the oil felt tightly to the surface of the crash wall;

[0013] Step 4: Paste the oil felt:

[0014] Paste the heated oil felt, paste the middle and upper part of the oil felt on the crash barrier, with the longitudinal direction parallel to the bridge deck pavement level, and paste the remaining part on the bridge deck pavement layer, so that the joint between the crash barrier and the bridge deck pavement layer is completely covered by the oil felt;

[0015] Step 5: Secondary heating of oil felt:

[0016] Use a hot torch or other heating tools to reheat the pasted oil felt until it softens. Do not heat it for a long time. The purpose is to make the oil felt fit effectively with the crash barrier and bridge deck pavement without any gaps.

[0017] Step six: Press the heated oil felt tightly with a flat plate to increase the adhesion.

[0018] Preferred technical solution 1: In step 4, positions for drainage holes on the bridge deck are reserved on the oil felt, and the drainage holes must not be pasted and sealed.

[0019] Preferred technical solution 2: The oil felt is a building material made of felt or thick paper made of animal hair or plant fiber and impregnated with asphalt.

[0020] The above structure enables this solution to have the following beneficial effects:

[0021] 1. Utilize the waterproof and anti-corrosion properties of oil felt to completely block water, snow, and snow-melting agents from invading the crash barrier and the gaps below the crash barrier, thus avoiding erosion of the crash barrier and water infiltration on the bridge deck;

[0022] 2. Use high temperature to soften the "oil felt" and directly stick it to the lower part of the crash wall and the joints between the crash wall and the bridge deck pavement. The construction work is easy and suitable for grassroots units to carry out work independently. At the same time, due to the characteristics and economic characteristics of oil felt, the waterproof and anti-seepage effects are obvious to all. For the same amount of anti-corrosion construction, the capital investment is reduced by more than 50% compared with the traditional maintenance and repair methods. The anti-corrosion of oil felt bridges has made significant progress in terms of construction technology, long-term effects and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 This is the corrosion status diagram of the anti-collision wall before the oil felt anti-corrosion construction of this scheme;

[0025] Figure 2 This is the effect after the oil felt anti-corrosion construction of this scheme. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. 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 embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-Figure 2 The anti-corrosion and anti-seepage construction method of the bridge crash wall for highway maintenance includes the following steps:

[0028] Step 1: Cut the oil felt:

[0029] Oil felt is waterproof and anti-corrosive. Use scissors and other cutting tools to cut the oil felt into strips about 40 cm wide. The length can be adjusted as needed.

[0030] Step 2: Clean the surface of the anti-collision wall:

[0031] Use high-pressure water guns and other cleaning tools to clean the crash barrier to remove all loose concrete and dust on the surface of the crash barrier, which is conducive to the subsequent pasting of oil felt; for crash barriers with exposed steel bars, rust removal can be performed on the exposed steel bars;

[0032] Step 3: Heat the oil felt on one side:

[0033] Use a hot torch or other heating tools to heat and soften the oil felt, and then fit the oil felt tightly to the surface of the crash barrier;

[0034] Step 4: Paste the oil felt:

[0035] Paste the heated oil felt. Paste the upper 30 cm of the oil felt on the crash barrier, with the longitudinal direction parallel to the bridge deck pavement level, and paste the remaining 10 cm on the bridge deck pavement layer, so that the joint between the crash barrier and the bridge deck pavement layer is completely covered by the oil felt;

[0036] The position of the bridge deck drainage hole can be reserved on the asphalt felt in advance, but the drainage hole shall not be sealed by gluing;

[0037] Step 5: Secondary heating of oil felt:

[0038] Use a hot torch or other heating tools to reheat the pasted oil felt until it softens. Do not heat it for a long time. The purpose is to make the oil felt fit effectively with the crash barrier and bridge deck pavement without any gaps.

[0039] Step six: Press the heated oil felt tightly with a flat plate to increase the adhesion.

[0040] At this point, the entire bridge oil felt waterproofing and anti-corrosion process construction process is completed.

[0041] "Oil felt" is a building material made of felt or thick paper made of animal hair or plant fiber that is soaked in asphalt. It is waterproof and tough. It is generally used as moisture-proof, alkali-proof, corrosion-resistant, leak-proof and rainproof layers for roofs, foundations, basement walls, etc. It is easy to unfold and does not crack when the temperature is above 10°C; it does not stick together when the temperature is below 45°C; it does not drip, expand, bubble, or stick, and the spread does not flow when the temperature is below 75°C-85°C; it is so soft that there are no cracks when bent to the naked eye when the temperature is around 18°C; it is waterproof under the pressure of a water column 50 cm high; its cost is about 30 yuan per square meter, which saves the cost of disease treatment to a certain extent.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for anti-corrosion and anti-seepage construction of a bridge crash wall for highway maintenance, characterized in that: The steps include: Step 1: Cut the oil felt: Use scissors and other cutting tools to cut the oil felt into long strips, and adjust the length as needed; Step 2: Clean the surface of the anti-collision wall: Use high-pressure water guns and other cleaning tools to clean the crash barrier to remove all loose concrete and dust on the surface of the crash barrier, which is conducive to the subsequent pasting of oil felt; for crash barriers with exposed steel bars, rust removal can be performed on the exposed steel bars; Step 3: Heat the oil felt on one side: Use a hot torch or other heating tools to heat and soften the oil felt, and then fit the oil felt tightly to the surface of the crash wall; Step 4: Paste the oil felt: Paste the heated oil felt, paste the middle and upper part of the oil felt on the crash barrier, with the longitudinal direction parallel to the bridge deck pavement level, and paste the remaining part on the bridge deck pavement layer, so that the joint between the crash barrier and the bridge deck pavement layer is completely covered by the oil felt; Step 5: Secondary heating of oil felt: Use a hot torch or other heating tools to reheat the pasted oil felt until it softens. Do not heat it for a long time. The purpose is to make the oil felt fit effectively with the crash barrier and bridge deck pavement without any gaps. Step six: Press the heated oil felt tightly with a flat plate to increase the adhesion.

2. The anti-corrosion and anti-seepage construction method of a bridge crash wall for highway maintenance according to claim 1, characterized in that: The cutting width of the oil felt described in step 1 is 40 cm.

3. The anti-corrosion and anti-seepage construction method of a bridge crash wall for highway maintenance according to claim 2, characterized in that: The upper 30 cm of the oil felt described in step 4 is pasted on the crash barrier, and the lower 10 cm is pasted on the bridge deck pavement.

4. The anti-corrosion and anti-seepage construction method of a bridge crash wall for highway maintenance according to claim 1, characterized in that: As mentioned in step 4, positions for drainage holes on the bridge deck are reserved on the asphalt felt, and the drainage holes must not be pasted and sealed.

5. The anti-corrosion and anti-seepage construction method of a bridge crash wall for highway maintenance according to claim 1, characterized in that: The oil felt has waterproof and anti-corrosion properties.

6. The anti-corrosion and anti-seepage construction method of a bridge crash wall for highway maintenance according to claim 5, characterized in that: The oil felt is a building material made of felt or thick paper made of animal hair or plant fiber and impregnated with asphalt.

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