Water stop construction method for seawall concrete engineering

Abstract

The invention discloses a seawall concrete engineering waterstop construction method, which comprises the steps of waterstop copper sheet processing, waterstop copper sheet transportation, waterstop copper sheet joint welding and waterstop copper sheet installation, in the waterstop copper sheet processing, mechanical cutting is adopted, and cold press molding is required in the processing; in the water stop copper sheet transportation, the water stop copper sheet is transported to a construction site from a processing workshop by adopting a material transport vehicle; according to the water stop copper sheet connector welding, wire welding and gas welding flux, a cut strip of copper water stop base metal is adopted, and a deoxidizing agent is placed in welding powder; a gas welding process: cleaning a welding wire and a weldment before welding; neutral flame is selected as welding flame; oxidizing flame can oxidize a molten pool, and brittle cuprous oxide is formed in a welding seam; a weldment is preheated before welding, and single-pass welding is adopted during welding; the water stop copper sheet is installed, and the water stop copper sheet is installed in a cross-seam centering mode according to the design position; the method has the advantages that the quality of seawall concrete engineering is improved, and the service life of the seawall concrete engineering is prolonged.

Description

Technical Field

[0001] The invention relates to a seawall concrete engineering construction method, in particular to a seawall concrete engineering waterstop construction method. Background Art

[0002] In the coastal areas of Jiangsu and Zhejiang, seawall construction is an important livelihood project. During the construction of seawalls, water-stopping construction is required before pouring concrete to ensure the firmness of the entire seawall project and its service life. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a seawall concrete engineering water-stopping construction method in view of the deficiencies in the prior art.

[0004] In order to achieve the above object, the measures taken by the present invention are:

[0005] A water-stop construction method for seawall concrete engineering, comprising water-stop copper sheet processing, water-stop copper sheet transportation, water-stop copper sheet joint welding and water-stop copper sheet installation,

[0006] The processing of the water-stop copper sheet adopts mechanical cutting. It is forbidden to use iron tools to hammer the surface of the copper sheet during the processing. The processing must be cold-pressed by a mold. After the processing of water-stop copper sheets of different specifications, they are marked with a sign. The water-stop copper sheet is provided with a protruding part of a copper nose, and it is forbidden to paint the protruding part;

[0007] The water-stop copper sheet transportation is to use a material transport vehicle to transport the water-stop copper sheet from the processing workshop to the construction site. During the transportation process, the vehicle speed must be controlled to ensure that the water stop is not damaged due to transportation;

[0008] The described welding of the water-stop copper sheet joint, the steps of welding the water-stop copper sheet at the construction site are: welding wire and gas welding flux: use the cut strips of the copper water-stop base material, put the deoxidizer in the welding powder, and the welding powder uses gas agent 301; gas welding process: clean the welding wire and the weldment before welding, generally use a wire brush or sandpaper to remove the surface oil and adsorbed gas; use a neutral flame for welding: the oxidizing flame will oxidize the molten pool and form brittle cuprous oxide in the weld; the carburizing flame will produce carbon monoxide and hydrogen, which enter the weld to form pores; preheat the weldment before welding: the preheating temperature is 400-500℃; because the high-temperature copper liquid easily absorbs gas, it is a defect of porous weld metal. At the same time, the grains in the heat-affected zone of the weld are coarse, which will also reduce the mechanical properties of the weld joint, so the fewer the number of welding layers of the weld, the better, and single-pass welding is used during welding; after welding, hammer the weld joint to make the metal grains finer, thereby improving its mechanical properties;

[0009] The installation of the water-stop copper sheet is as follows: the water-stop copper sheet is installed in the cross-seam alignment according to the designed position, and is positioned with brackets and clamps to ensure that no deformation or displacement occurs during the concrete pouring process; it is prohibited for the tie bars and steel bars to touch the water-stop copper sheet; the connection of the water-stop copper sheet is folded, bitten or overlapped, and the overlap length is not less than 20mm. The bitten or overlapped joints are double-sided welded, and the welding operation must be carried out after the test welding sample is submitted for approval by the supervisor; the rubber rod is inserted into the copper nose of the water-stop copper sheet, and then filled with foam; when installing the water-stop copper sheet, it is strictly ensured that the groove part is consistent with the position of the expansion joint and arranged on the seam; the two wings buried in the concrete should be tightly combined with the concrete, and when pouring the concrete near the water-stop copper sheet, it should be assisted by manual vibration to make it dense, and it is strictly prohibited for the concrete to have honeycombs, dog holes and folding of the water-stop sheet; the installed water-stop copper sheet should be fixed and protected; reliable measures should be taken to ensure the pouring quality of the concrete near the water-stop copper sheet to prevent the formation of leakage channels;

[0010] During the processing of the water-stop copper sheet, the surface of the water-stop copper sheet should be inspected after forming. If there are cracks or marks, it should be regarded as scrap and the quality of the same batch of materials must be re-inspected.

[0011] During the installation of the water-stop copper sheet, the water-stop copper sheet has been buried in the first cast concrete block to prevent its deformation, displacement and tearing damage. The water-stop copper sheet is installed at least 20 cm above the surface of the first cast block;

[0012] The construction method also includes protecting the water-stop copper sheet. During the concrete vibration process, large-diameter aggregates in the concrete material around the water-stop copper sheet are removed. When vibrating near the water-stop copper sheet, a soft-shaft vibrating rod or a small vibrator is used to vibrate and compact the concrete.

[0013] The protection of water-stop copper sheet also includes: prohibiting direct cutting of materials at the water-stop copper sheet;

[0014] The protection of water-stop copper sheets also includes: during the construction process, it is forbidden to trample on the horizontal water-stop copper sheets; remove the dirt and debris on the water-stop copper sheets; for the vertical water-stop copper sheets of the concrete pouring blocks that are not temporarily rising or the water-stop sheets exposed on the adjacent concrete blocks that are not temporarily being constructed, use wooden boards to clamp and reinforce them firmly;

[0015] The concrete pouring can only be carried out after the water-stop copper sheet is completely positioned;

[0016] After welding, the oil stains on the surface of the water-stop copper sheet are cleaned;

[0017] The beneficial effects of the present invention are as follows: the quality of seawall concrete engineering is improved, and the service life of seawall concrete engineering is also increased. DETAILED DESCRIPTION

[0018] A water-stop construction method for seawall concrete engineering, comprising water-stop copper sheet processing, water-stop copper sheet transportation, water-stop copper sheet joint welding and water-stop copper sheet installation,

[0019] The processing of the water-stop copper sheet adopts mechanical cutting. It is forbidden to use iron tools to hammer the surface of the copper sheet during the processing. The processing must be cold-pressed by a mold. After the processing of water-stop copper sheets of different specifications, they are marked with a sign. The water-stop copper sheet is provided with a protruding part of a copper nose, and it is forbidden to paint the protruding part;

[0020] The water-stop copper sheet transportation is to use a material transport vehicle to transport the water-stop copper sheet from the processing workshop to the construction site. During the transportation process, the vehicle speed must be controlled to ensure that the water stop is not damaged due to transportation;

[0021] The described welding of the water-stop copper sheet joint, the steps of welding the water-stop copper sheet at the construction site are: welding wire and gas welding flux: use the cut strips of the copper water-stop base material, put the deoxidizer in the welding powder, and the welding powder uses gas agent 301; gas welding process: clean the welding wire and the weldment before welding, generally use a wire brush or sandpaper to remove the surface oil and adsorbed gas; use a neutral flame for welding: the oxidizing flame will oxidize the molten pool and form brittle cuprous oxide in the weld; the carburizing flame will produce carbon monoxide and hydrogen, which enter the weld to form pores; preheat the weldment before welding: the preheating temperature is 400-500℃; because the high-temperature copper liquid easily absorbs gas, it is a defect of porous weld metal. At the same time, the grains in the heat-affected zone of the weld are coarse, which will also reduce the mechanical properties of the weld joint, so the fewer the number of welding layers of the weld, the better, and single-pass welding is used during welding; after welding, hammer the weld joint to make the metal grains finer, thereby improving its mechanical properties;

[0022] The installation of the water-stop copper sheet is as follows: the water-stop copper sheet is installed in the designed position across the seam, and is positioned with brackets and clamps to ensure that no deformation or displacement occurs during the concrete pouring process; it is prohibited for the tie bars and steel bars to touch the water-stop copper sheet; the connection of the water-stop copper sheet is folded, bitten or overlapped, and the overlap length is not less than 20mm. The bitten or overlapped joints are double-sided welded, and the welding operation must be carried out after the trial welding sample is submitted to the supervisor for approval; among them, the welding quality of the "cross" joints and "T" joints of the water-stop copper sheet should be strictly controlled during on-site processing; the expansion joint waterstop sheet in the middle warehouse of the large warehouse surface should be erected at the predetermined position before concrete pouring, and fixed with steel bars, etc., No displacement shall occur due to concrete unloading or vibration; when pouring concrete, large-size aggregates in the concrete around the waterstop should be removed and the quality of concrete pouring should be ensured; a rubber rod should be inserted into the copper nose of the waterstop copper sheet and then filled with foam; when installing the waterstop copper sheet, the groove should be strictly aligned with the expansion joint and arranged across the joint; the two wings buried in the concrete should be tightly combined with the concrete, and when pouring concrete near the waterstop copper sheet, it should be compacted by manual vibration, and the appearance of honeycombs, dog holes and folding of waterstop sheets is strictly prohibited; the installed waterstop copper sheet should be fixed and protected; reliable measures should be taken to ensure the pouring quality of the concrete near the waterstop copper sheet to prevent the formation of leakage channels.

[0023] During the processing of the water-stop copper sheet, the surface of the water-stop copper sheet should be inspected after forming. If there are cracks or marks, it should be regarded as scrap and the quality of the same batch of materials must be re-inspected.

[0024] In the installation of the water-stop copper sheet, the water-stop copper sheet has been buried in the first cast concrete block to prevent its deformation, displacement and tearing damage. The water-stop copper sheet is installed at least 20 cm above the surface of the first cast block.

[0025] The construction method also includes protecting the water-stop copper sheet. During the concrete vibration process, large-diameter aggregates in the concrete around the water-stop copper sheet are removed. When vibrating near the water-stop copper sheet, a soft-shaft vibrator or a small vibrator is used to vibrate and compact it. It is strictly forbidden to prevent the vibrator from directly touching the water-stop sheet during the vibration process, which may cause the water-stop sheet to shift.

[0026] The protection of the copper water stop also includes: it is forbidden to directly cut materials at the copper water stop, so as to prevent the concrete from directly impacting the water stop during the pouring process, causing the water stop to shift and deform.

[0027] The protection of copper water-stopping sheets also includes: during the construction process, it is forbidden to trample on the horizontal copper water-stopping sheets; remove the dirt and debris on the copper water-stopping sheets; for the vertical copper water-stopping sheets of the concrete casting block that are not rising temporarily or the water-stopping sheets of the adjacent concrete blocks that are not exposed on the construction surface, use wooden boards to clamp and reinforce them firmly to avoid accidental damage to the copper water-stopping sheets during the construction process.

[0028] Concrete pouring can only be carried out after the water-stop copper sheet is completely positioned.

[0029] After welding, the oil stains on the surface of the water-stop copper sheet are cleaned.

[0030] The water-stop copper sheet is made of red copper sheet, which must be tempered before processing, and the overlapping parts of the water-stop copper sheet must be welded with copper.

[0031] When installing the water-stop copper sheet, there are horizontally installed water-stop copper sheets and vertically installed water-stop copper sheets. The horizontally installed water-stop copper sheet adopts U-shaped copper water-stop sheets, with a seam width of 2cm, and the seams are all pasted with prefabricated asphalt fir boards (apply asphalt on the surface first). The connection of the water-stop copper sheet adopts welding overlap, and the overlap length shall not be less than 20mm, and double-sided welding is adopted. The welding rod adopts copper welding wire. The copper sheet must be tempered before processing, and the overlap of the water-stop sheet must be welded with copper, and the weld must meet the relevant specifications. When using copper strips to process water-stop strips, the tensile strength should be no less than 205MPa, and the elongation should be no less than 20%.

Claims

1. A method for water-stopping construction of seawall concrete engineering, comprising processing of water-stop copper sheets, transportation of water-stop copper sheets, welding of water-stop copper sheet joints and installation of water-stop copper sheets, characterized in that: The water-stop copper sheet processing adopts mechanical cutting, and it is forbidden to use iron tools to hammer the copper sheet surface during the processing. The processing mold is cold-pressed. After the water-stop copper sheets of different specifications are processed, they are marked with signs. The water-stop copper sheet is provided with a protruding part of a copper nose, and it is forbidden to paint the protruding part; The water-stop copper sheet transportation is to use a material transport vehicle to transport the water-stop copper sheet from the processing workshop to the construction site. During the transportation process, the vehicle speed must be controlled to ensure that the water stop is not damaged due to transportation; The welding of the water-stop copper sheet joint, the steps of welding the water-stop copper sheet at the construction site are: welding wire and gas welding flux: use the cut strips of the copper water-stop base material, put the deoxidizer in the welding powder, and the welding powder uses gas flux 301; gas welding process: clean the welding wire and the weldment before welding, and use a wire brush or sandpaper to remove the surface oil and adsorbed gas; use a neutral flame for welding: the oxidizing flame will oxidize the molten pool and form brittle cuprous oxide in the weld; the carburizing flame will produce carbon monoxide and hydrogen, which enter the weld to form pores; preheat the weldment before welding: the preheating temperature is 400-500°C; single-pass welding is used during welding; the welded joint is hammered after welding; The installation of the water-stop copper sheet is as follows: the water-stop copper sheet is installed in the designed position across the seam and is positioned with brackets and clamps to ensure that no deformation or displacement occurs during the concrete pouring process; it is prohibited for the tie rods and steel bars to touch the water-stop copper sheet; the connection of the water-stop copper sheet is achieved by folding, biting or overlapping, and the overlapping length is not less than 20 mm, and the biting or overlapping is double-sided welding; after the rubber rod is inserted into the copper nose of the water-stop copper sheet, it is filled with foam; the installed water-stop copper sheet is fixed and protected; reliable measures should be taken to ensure the pouring quality of the concrete near the water-stop copper sheet to prevent the formation of leakage channels.

2. A seawall concrete engineering water-stopping construction method according to claim 1, characterized in that: During the processing of the water-stop copper sheet, the surface of the water-stop copper sheet should be inspected after forming.

3. A seawall concrete engineering water-stopping construction method according to claim 1 or 2, characterized in that: During the installation of the water-stop copper sheet, the water-stop copper sheet has been embedded in the first cast concrete block to prevent its deformation, displacement and tearing damage. The water-stop copper sheet is installed at least 20 cm above the surface of the first cast block.

4. A seawall concrete engineering water-stopping construction method according to claim 3, characterized in that: The construction method also includes protecting the water-stop copper sheet. During the concrete vibration process, large-size aggregates in the concrete around the water-stop copper sheet are removed. When vibrating near the water-stop copper sheet, a soft-shaft vibrator or a small vibrator is used to vibrate and compact it.

5. A seawall concrete engineering water-stopping construction method according to claim 4, characterized in that: The protection of water-stop copper sheets also includes: it is prohibited to cut materials directly at the water-stop copper sheets.

6. A seawall concrete engineering water-stopping construction method according to claim 5, characterized in that: The protection of water-stop copper sheets also includes: during the construction process, it is prohibited to trample on the horizontal water-stop copper sheets; and to remove dirt and debris from the water-stop copper sheets.

7. A seawall concrete engineering water-stopping construction method according to claim 6, characterized in that: Concrete pouring can only be carried out after the water-stop copper sheet is completely positioned.

8. A seawall concrete engineering water-stopping construction method according to claim 7, characterized in that: After welding, the oil stains on the surface of the water-stop copper sheet are cleaned.

9. A seawall concrete engineering water-stopping construction method according to claim 8, characterized in that: The water-stop copper sheet is made of red copper sheet, which must be tempered before processing, and the overlapping parts of the water-stop copper sheet must be welded with copper.