CN112211230A - Steel plate mortar brick composite structure and method for repairing leakage of concrete structure by using same - Google Patents
Steel plate mortar brick composite structure and method for repairing leakage of concrete structure by using same Download PDFInfo
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- CN112211230A CN112211230A CN202011098388.5A CN202011098388A CN112211230A CN 112211230 A CN112211230 A CN 112211230A CN 202011098388 A CN202011098388 A CN 202011098388A CN 112211230 A CN112211230 A CN 112211230A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 75
- 239000010959 steel Substances 0.000 title claims abstract description 75
- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 55
- 239000011449 brick Substances 0.000 title claims abstract description 45
- 239000004567 concrete Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000002131 composite material Substances 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000011083 cement mortar Substances 0.000 claims abstract description 6
- 238000007788 roughening Methods 0.000 claims description 9
- 238000004873 anchoring Methods 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 238000005422 blasting Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000005242 forging Methods 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000000654 additive Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 claims description 2
- 230000000996 additive effect Effects 0.000 claims 1
- 230000002421 anti-septic effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 22
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 22
- 239000004568 cement Substances 0.000 description 11
- 241000264877 Hippospongia communis Species 0.000 description 10
- 229920001971 elastomer Polymers 0.000 description 7
- 239000004814 polyurethane Substances 0.000 description 7
- 229920002635 polyurethane Polymers 0.000 description 7
- 230000006378 damage Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229920000049 Carbon (fiber) Polymers 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 4
- 239000004917 carbon fiber Substances 0.000 description 4
- 239000003822 epoxy resin Substances 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 229920006231 aramid fiber Polymers 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000003892 spreading Methods 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 229920006334 epoxy coating Polymers 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229910000926 A-3 tool steel Inorganic materials 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
- E02D31/04—Watertight packings for use under hydraulic pressure
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D37/00—Repair of damaged foundations or foundation structures
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
- E21D11/385—Sealing means positioned between adjacent lining members
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/0021—Mortar
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Architecture (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to a steel plate mortar brick composite structure and a method for repairing leakage of a concrete structure, wherein a steel plate with a certain width and thickness is selected, and the surface of the steel plate is subjected to rough and anticorrosive treatment; plugging the leakage gap of the structure by means of a grouting material to ensure that no water seepage occurs; performing chiseling treatment on the surface of the concrete structure on the crack and leakage surface; then high-strength cement mortar is uniformly distributed on the surface of the steel plate after rough treatment and is internally stuck to cracks or leakage positions, and after the mortar is solidified, a high-strength thin-layer steel plate mortar brick composite structure is formed on the leakage surface, so that the purpose of radical treatment of leakage is achieved. The whole leakage treatment time is short, the influence on the structure space function is small, the manufacturing cost is low, and the method has extremely important popularization and application values.
Description
Technical Field
The invention belongs to the field of structural waterproof engineering, and relates to a steel plate mortar brick composite structure and a method for repairing leakage of a concrete structure by using the same.
Background
The underground structure engineering has the characteristics of large building area, wide range, large embedding depth, high construction technical requirement and the like, and the problem of structural leakage is difficult to be solved radically. Research shows that the phenomena of water-proof failure and water leakage of buildings generally exist, and once the underground structure fails to be water-proof, the underground structure is difficult to remedy, so that the problem of water leakage of the underground structure of the building is a difficult problem in the construction industry. At present, various waterproof materials such as coatings, coiled materials and the like are generally adopted for waterproof treatment, the construction site conditions are complex, in addition, the concrete structure has the characteristics of high compressive strength and low tensile strength, structural shrinkage cracks are easily caused in the pouring process, along with the damage or discontinuity of the waterproof materials, improper treatment is carried out on construction joints and deformation joints, the leakage is inevitable, later-stage leakage stoppage is difficult, and even the situation of 'repeated leakage stoppage and repeated leakage' is caused.
The causes of the leakage of the underground structure are many, and are embodied in the following aspects:
1) in the construction process of the structural concrete, the problems of material, vibration, temperature difference, maintenance, form removal and the like are controlled, and structural cracks are caused to leak;
2) the seepage is caused by the fact that the scabbling of post-cast strips (expansion joints, settlement joints and shockproof joints) and construction joints is not in place, garbage is not cleaned up and the like;
3) the structure is deformed and damaged due to excessive differential settlement, so that leakage occurs;
4) the load exceeding the design requirement in the later stage use causes structural crack.
Referring to the relevant literature data at present, the prior art is difficult to completely eradicate the underground structure leakage, and water diversion or leakage stoppage is generally carried out through the following measures:
1) and (5) performing conventional treatment. For leakage caused by the rough surface of the structural honeycomb, the range of leakage points is often cleaned, the leakage points are found, chiseled into a splayed shape, and the splayed leakage points are troweled by using a quick-setting waterproof material.
2) Grouting, the most commonly used method at present. The concrete surface crack is generally reinforced by grouting, and plugging slurry, such as epoxy resin, polyurethane, and cement slurry or double-fluid slurry, is pressed into the grouting hole by using a grouting machine. And (3) the distance between the grouting holes and the crack is about 110mm, the vacant positions are staggered, inclined holes with the distance of 250mm are arranged, the inclination angle is about 60 degrees, the hole depth is about 250mm, the hole diameter is 12mm, the grouting holes are flushed by utilizing pressure water, grouting nozzles are buried, and the grouting plugging is carried out by using the materials.
3) Waterstop or large crack leakage treatment. Chiseling grooves with the depth of about 30mm and the length of about 200-300mm longer than the two ends of the crack on the two sides of the crack at 15mm of the two sides of the crack in the leakage area, washing the grooves cleanly, adding water into the rapid-hardening cement to prepare strips, and quickly filling the strips into the grooves to ensure that the grooves are fully filled with the rapid-hardening cement adhesive strips; and if the leakage range is longer, blocking in sections.
4) And (5) pasting and reinforcing the aramid fiber cloth. Cleaning an interface, removing oil stains and corrosive impurities, smearing a primer on a crack structure surface, polishing putty to be smooth, and reinforcing and repairing cracks by using aramid fiber special glue.
In the plugging method, for grouting plugging, most structural leakage is caused by concrete structural cracks, the width of the structural leakage is usually small and is generally less than 0.2mm, grouting of cement paste or double-liquid cement is difficult, the effect is poor, plugging is difficult, and epoxy resin grouting material or polyurethane grouting material is mostly adopted. The polyurethane belongs to a flexible material, has no strength and poor durability, the durability of the epoxy resin is slightly stronger than that of the polyurethane, but the leakage can be recovered after two to three years and even shorter time;
by grooving the steel disc and smearing quick-drying cement later, the depth of reinforcement treatment is extremely shallow, generally 10-30 mm, after encountering structural steel bars, the steel disc cannot be further chiseled for deep treatment, the quick-drying cement is blocked on the surface, cracks are easy to appear to cause leakage, and the repair effect is not very good, so that the grooving method is really adopted for leakage repair of the underground structure in the leakage of the underground structure, and the grooving method is not widely applied.
The surface paved flexible material is subjected to crack reinforcement and reinforcement, caulked putty is firstly used for polishing, then aramid fiber cloth is paved, the effect of treating the surface of the waterproof upstream face is generally good, the structure construction is completed, the internal surface treatment is affected by the durability, strength and the like of the caulked material and the paving adhesive, and the seepage-proofing effect of the internal treatment of the structure is poor.
Therefore, at present, the construction of an underground structure is finished, leakage occurs, a grouting repairing mode is adopted generally, but repeated leakage occurs in a short time, drainage is performed usually by a mode of arranging a catch basin, and no good implementation method exists internationally for radical treatment of seepage prevention.
The invention is planned on the surface of the crack, forms a layer of high-strength steel plate mortar thin layer composite structure by paving and pasting the steel plate mortar bricks, reinforces the structures such as the crack, the construction joint, the deformation joint, the honeycomb and the like of the concrete structure body, and prolongs the seepage path, thereby realizing the radical treatment of the seepage and having extremely important popularization and application values.
Disclosure of Invention
[ detailed description ] embodiments
The invention relates to a steel plate mortar brick composite structure and a method for repairing the leakage of a concrete structure, which mainly comprises two stages of permanently repairing the leakage caused by cracks, construction joints, deformation joints, structural honeycombs and the like of the concrete structure, wherein the first stage is used for temporarily plugging the leakage, and the second stage is used for repairing the leakage surfaces of the cracks, the construction joints, the honeycombs and the like, and the concrete mode is as follows:
1. and (5) temporarily blocking leakage. According to the size of the leakage flow of the cracks or construction joints, drilling holes with certain depth and certain row spacing in the leakage area, and then comprehensively selecting cement and water glass double-liquid slurry, epoxy resin or polyurethane for pressure injection to ensure that the surface of the structure has no water seepage and play a role in temporary plugging.
2. And (4) repairing the leakage surface mortar steel plate bricks such as cracks, construction joints, honeycombs and the like at high strength.
(2) and (5) forming and processing the plate. Processing the roughly processed steel plate into shapes such as length, width, angle and the like and sizes of different specifications which are suitable for repairing cracks, construction joints, honeycombs and the like in different structural forms by means of equipment such as bending, forging and pressing and the like;
(3) and welding the anchoring studs. In order to further strengthen the adhesive force between the steel plate and the mortar, short anchoring studs or reinforcing steel bars can be welded on the surface of the steel plate, so that the high-strength engagement between the mortar and the steel plate is realized;
(4) and (5) performing anticorrosive treatment on the surface of the steel plate brick. The free face of the steel plate brick can be subjected to anticorrosion treatment by virtue of processes such as epoxy coating or zinc spraying, so that the steel plate brick is ensured not to be rusted and damaged during the use period of the structure;
(5) and roughening the surfaces of the cracks and the leakage construction joints. Chiseling the surface of the concrete to improve the binding power of the surface of the concrete to mortar;
(6) and (5) preparing mortar. Adding a proper amount of water and additives into cement, fly ash, yellow sand, mineral powder, carbon fiber, steel fiber and the like according to a certain proportion to prepare cement mortar for later use, wherein the cement mortar material with high strength and flexibility can be prepared by proper mixing proportion;
(7) and laying and fixing the steel plate bricks. Uniformly spreading mortar on the steel plate brick subjected to the roughening and concave-convex treatment, and spreading the mortar on the crack, the construction joint and the honeycomb leakage surface, wherein when the mortar is spread, the steel plate and the mortar with certain widths are covered on two sides of the crack and the leakage area so as to prolong the seepage path;
(8) and (6) processing the seam. Seams may exist among the seams of the steel plate bricks, and the steel plate bricks are welded or pressed with waterproof materials, glass cement and the like, so that no leakage exists among the seams.
Thus, after the mortar is solidified to form strength, a thin-layer, high-strength, flexible and compact mortar steel plate brick anti-seepage covering surface composite structure is formed on the seepage surface of a concrete crack or a construction joint, and permanent repair is realized on the surface of a concrete structure without seepage.
[ PROBLEMS ] characteristics
The steel plate mortar brick composite structure and the repairing method thereof for concrete structure leakage have the following characteristics:
(1) after repair, cracks, construction joints, deformation joints, structural honeycombs and the like do not leak. If the mixing proportion of the formed high-strength compact mortar and the outer coating thin steel plate is proper, the strength of the formed high-strength compact mortar is higher, even close to that of C60 concrete, and higher than that of concrete such as plate surfaces, side walls and the like of most structural engineering. Meanwhile, the main components of the seepage agent cannot react with water, atmosphere and the like, and once the restoration is finished, the whole seepage path is sealed permanently and does not leak any more.
(2) The repair layer is thin and has small influence on the structural clearance. The thickness of the selected plate and the thickness of the covered mortar layer are all thin, the thickness of the composite structure is 10-20 mm, the permanent plugging effect can be achieved, the clearance influence of the size range on the structure is very small, and therefore the influence on the function of the whole building is extremely small.
(3) The application range is wide. The high-strength flexible mortar is paved by selecting thin-layer steel plate bricks with proper width, so that permanent leakage plugging and repairing of concrete cracks, structural construction joints, deformation joints, structural honeycombs and even fabricated structures such as tunnel segments, jacking pipe lining joints and the like can be realized.
(4) Can adapt to further micro deformation of certain cracks or construction joints. The mixing proportion of the mortar materials is properly adjusted, and a proper amount of carbon fiber, steel fiber and the like are added, so that the formed mortar steel plate brick composite structure has certain toughness and ductility and can adapt to a certain amount of structural deformation.
(5) Further development of structural cracks can be prevented. In the mortar steel plate brick, the steel plate structure and carbon fiber, steel fiber and the like in mortar have higher tensile strength, and can play a role in preventing further development of concrete cracks.
(6) Relatively few materials are used. The repair of cracks, construction joints and the like only needs a small amount of thin steel plates, studs, mortar and the like, is assisted by a small amount of temporary leakage plugging materials, and the whole consumption of the materials is less.
(7) The repair speed is high. The preparation of the material is complete, and the permanent repair of the leakage can be completed within 2-3 hours.
[ EXAMPLES ]
The steel plate mortar brick composite structure and the method for repairing the leakage of the concrete structure are concretely explained by taking the leakage repair of the segment joints of the subway shield tunnel as an example:
cause subway shield tunnel section of jurisdiction's seepage can many-sided reason, for example the section of jurisdiction is assembled in-process, the destruction of elasticity rubber waterstop, the section of jurisdiction is cracked, rubber ageing etc, traditional repair in-process, when damaged or the section of jurisdiction structure destruction is serious to rubber, generally be outside pressure injection grout, it is less to the crack width, generally pressure injection epoxy or polyurethane, but after a period, because the vibration of driving the train, and epoxy, self no intensity such as polyurethane, and dissolve in the aquatic gradually, and make whole seepage shutoff inefficacy, the seepage is again gone into to whole structure. The consequences caused by the method are very serious, firstly, the corrosion damage of the concrete reinforcing steel bar is further aggravated in a running water state, and the service cycle of the whole structure is shortened; and secondly, water and soil loss around the pipe piece causes deformation of the surrounding stratum, aggravates uneven settlement of the tunnel structure and possibly causes structural damage. The invention fills the gap in the aspect of how to effectively repair the structure, which is still an international problem at present. The following takes the case of tunnel leakage caused by aging failure of the tunnel elastic rubber sealing gasket as an example to specifically describe the repairing method of the invention, and the specific implementation is as follows:
1. and (5) temporarily blocking leakage of the segment assembling seam. At the piece position, the drilling pierces through elastic rubber and seals up, and installation syringe needle formula slip casting pipe, this department hypothesis take place at the ageing initial stage of rubber, cause the seepage flow relatively less, consequently, carry out the leaking stoppage through pressure injection epoxy to guarantee that the section of jurisdiction assembles the surface of seam and temporarily do not have the infiltration, realize interim shutoff.
2. And (3) permanently repairing the mortar steel plate bricks on the surfaces of the abutted seams of the duct pieces in high strength.
(2) and (5) forming and processing the plate. Bending the steel plate into an arc with equal curvature radius of the tunnel inner arc surface by using a plate bending machine, wherein the inner diameter of a circular seam of the Shanghai subway tunnel is 2950mm, for example;
(3) and welding the anchoring studs. Welding two rows of short anchoring studs on the outer arc surface of the steel plate, wherein the length of the studs is about 6mm, and the distance between the studs is 150 mm;
(4) and (4) performing anticorrosive treatment on the inner surface of the steel plate brick. Epoxy paint is sprayed on the inner surface of the steel plate brick for corrosion prevention treatment, so that the steel plate brick is ensured not to be rusted and damaged during the use of the structure. Thus, the arc steel plate brick is manufactured
(5) And (5) roughening the surfaces of the pipe piece assembling seams. Chiseling the surface of the duct piece within 100mm of the position, wherein the chiseling depth is 3-5 mm;
(6) and (5) preparing mortar. Adding a proper amount of water and a water reducing agent into cement, fly ash, yellow sand, mineral powder, carbon fiber, steel fiber and the like according to a mixing ratio determined by an indoor test to prepare cement mortar, and forming high-strength flexible mortar after the cement mortar is solidified;
(7) and laying and fixing the steel plate bricks. Uniformly spreading mortar on the roughened arc-shaped steel plate bricks, wherein the thickness of the mortar is 6-10 mm, and the steel plate bricks are spread and attached to the surfaces of segment splicing seams, wherein the splicing seams are positioned in the centers of the steel plate bricks;
(8) and (5) treating the joints of the mortar steel plate bricks. Because the vertical ring seam in whole tunnel is very much and long, need splice by the polylith brick, to the piece joint of fragment of brick, this department chooses for use the welding mode to connect, and the welding is accomplished the back, should add proper amount expansion bolts or anchor reinforcing bar, stretches into inside the section of jurisdiction to ensure that mortar steel plate brick can not take place to drop and cause the accident, at last, spraying epoxy coating is anticorrosive.
Thus, after the mortar is solidified to form strength, a thin-layer, high-strength, flexible and compact mortar steel plate brick anti-seepage covering surface is formed on the inner arc surface of the splicing seam of the tunnel, and the structure is permanently repaired without leakage.
For the leakage caused by cracks, construction joints or honeycombs and the like of a common structure, the mortar steel plate bricks can be paved, attached and butted in the same way, so that the permanent repair of the structure is realized without leakage.
Drawings
The invention is attached together1 figure 1 is a schematic cross section diagram of repair of a high-strength mortar steel plate brick leaked from a duct piece circular seam, wherein,
is a grouting pipe;
is a steel plate;
is an anchoring stud;
is high-strength mortar;
a structural duct piece;
an elastic rubber gasket;
and (7) a water retaining strip.
Claims (3)
1. The thin-layer steel plate mortar brick composite structure and the high-strength surface repairing method for concrete structure leakage firstly carry out temporary plugging on the structure leakage gap to ensure no water seepage; then selecting a steel plate with certain width and thickness, and carrying out rough and antiseptic treatment on the surface of the steel plate; roughening the surface of the concrete structure on the crack and leakage surface; and then high-strength cement mortar is uniformly distributed on the surface of the steel plate subjected to rough treatment and is internally attached to a crack or a leakage position, and after the mortar is solidified, a high-strength thin-layer steel plate mortar brick composite structure is formed on the leakage surface, so that permanent structural leakage water plugging is realized.
2. The thin-layer steel plate mortar brick composite structure and the high-strength surface repairing method for concrete structure leakage thereof according to claim 1, characterized in that:
the whole leaking stoppage is carried out in two stages, and the temporary plugging of the structural leakage is carried out by means of the traditional processes such as grouting, drainage and the like, so that the surface is dry and has no leakage; and in the second stage, the high-strength mortar steel plate brick is pasted, and the pasting width exceeds the crack for a certain distance so as to enlarge the seepage path of the mortar steel plate brick.
3. The thin-layer steel plate mortar brick composite structure and the high-strength surface repairing method for concrete structure leakage thereof according to claim 1, characterized in that:
the surface of the steel plate is subjected to roughening and concave-convex treatment, and the bonding strength of the mortar and the steel plate can be ensured by technologies such as shot blasting, polishing, forging and pressing or by directly welding anchoring studs; meanwhile, the mortar is added with a proper amount of additive, so that drying shrinkage cracks are not generated, and an anti-seepage mortar steel plate brick composite structure is formed.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113404326A (en) * | 2021-08-04 | 2021-09-17 | 肖长程 | Method for repairing floor cracks by using steel plates |
| CN113565344A (en) * | 2021-08-19 | 2021-10-29 | 交通运输部公路科学研究所 | Rapid leakage repairing method for underwater leakage channel of deepwater building |
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| CN202788022U (en) * | 2012-08-03 | 2013-03-13 | 中程建工集团有限公司 | Wall crack combined type repair structure |
| CN108193709A (en) * | 2018-01-02 | 2018-06-22 | 中建五局土木工程有限公司 | Underground pipe gallery and underground pipe gallery crack anti-seepage water treatment method |
| CN210946696U (en) * | 2019-09-17 | 2020-07-07 | 长沙普照生化科技有限公司 | Dam concrete seepage-proofing panel seepage underwater repair combined structure |
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| CN202788022U (en) * | 2012-08-03 | 2013-03-13 | 中程建工集团有限公司 | Wall crack combined type repair structure |
| CN108193709A (en) * | 2018-01-02 | 2018-06-22 | 中建五局土木工程有限公司 | Underground pipe gallery and underground pipe gallery crack anti-seepage water treatment method |
| CN210946696U (en) * | 2019-09-17 | 2020-07-07 | 长沙普照生化科技有限公司 | Dam concrete seepage-proofing panel seepage underwater repair combined structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113404326A (en) * | 2021-08-04 | 2021-09-17 | 肖长程 | Method for repairing floor cracks by using steel plates |
| CN113565344A (en) * | 2021-08-19 | 2021-10-29 | 交通运输部公路科学研究所 | Rapid leakage repairing method for underwater leakage channel of deepwater building |
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