CN116411573A - Method for repairing main rail section embedded part of main rail section of dam mesopore accident access door slot - Google Patents
Method for repairing main rail section embedded part of main rail section of dam mesopore accident access door slot Download PDFInfo
- Publication number
- CN116411573A CN116411573A CN202310394226.3A CN202310394226A CN116411573A CN 116411573 A CN116411573 A CN 116411573A CN 202310394226 A CN202310394226 A CN 202310394226A CN 116411573 A CN116411573 A CN 116411573A
- Authority
- CN
- China
- Prior art keywords
- sealing plate
- welding
- plate
- steel
- main rail
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000007789 sealing Methods 0.000 claims abstract description 187
- 239000004593 Epoxy Substances 0.000 claims abstract description 61
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 42
- 239000000463 material Substances 0.000 claims abstract description 34
- 238000011049 filling Methods 0.000 claims abstract description 12
- 238000003466 welding Methods 0.000 claims description 138
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 73
- 229910000831 Steel Inorganic materials 0.000 claims description 47
- 239000010959 steel Substances 0.000 claims description 47
- 238000010276 construction Methods 0.000 claims description 39
- 229910001220 stainless steel Inorganic materials 0.000 claims description 33
- 239000010935 stainless steel Substances 0.000 claims description 33
- 229910001208 Crucible steel Inorganic materials 0.000 claims description 23
- 238000005498 polishing Methods 0.000 claims description 21
- 239000011248 coating agent Substances 0.000 claims description 20
- 238000000576 coating method Methods 0.000 claims description 20
- 239000004033 plastic Substances 0.000 claims description 15
- 230000002787 reinforcement Effects 0.000 claims description 15
- 238000005520 cutting process Methods 0.000 claims description 14
- 238000005299 abrasion Methods 0.000 claims description 13
- 238000007493 shaping process Methods 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 10
- 238000007790 scraping Methods 0.000 claims description 9
- 238000009423 ventilation Methods 0.000 claims description 9
- 238000005553 drilling Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- 229920000742 Cotton Polymers 0.000 claims description 6
- 239000011324 bead Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 6
- 238000011010 flushing procedure Methods 0.000 claims description 6
- 230000001012 protector Effects 0.000 claims description 6
- 238000007711 solidification Methods 0.000 claims description 6
- 230000008023 solidification Effects 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 5
- AEEAZFQPYUMBPY-UHFFFAOYSA-N [I].[W] Chemical compound [I].[W] AEEAZFQPYUMBPY-UHFFFAOYSA-N 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 238000007605 air drying Methods 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 3
- 239000011449 brick Substances 0.000 claims description 3
- 230000001680 brushing effect Effects 0.000 claims description 3
- 239000011083 cement mortar Substances 0.000 claims description 3
- 238000007598 dipping method Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000003344 environmental pollutant Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 239000002932 luster Substances 0.000 claims description 3
- 239000011087 paperboard Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 231100000719 pollutant Toxicity 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000007788 roughening Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 230000037452 priming Effects 0.000 claims description 2
- 238000002513 implantation Methods 0.000 claims 2
- 230000008901 benefit Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a repairing method for a main rail section of a main rail of a dam mesoporous accident access door slot, which comprises the steps of repairing damaged corner plates through backfilling modified epoxy mortar, recovering a sealing plate structure through bar planting at the damaged sealing plate positions, and filling high-strength shrinkage-free grouting materials behind the sealing plate.
Description
Technical Field
The invention relates to the technical field of construction of hydroelectric engineering dams, in particular to a method for repairing buried parts of main rail sections of a main rail section of a gate slot of a middle hole accident access door of a dam.
Background
The dam is a core building in the water and electricity junction engineering, and the flood discharge mesopores are key structures of the dam, which directly influence the operation safety of the dam and even the whole junction. The concrete dam is generally provided with a certain number of middle holes or deep holes at the middle lower part of the dam body for releasing flood in flood season so as to ensure the safety of the dam body structure. The flood discharge middle hole accident access door slot has the advantages of complex structure, high technical difficulty and high construction quality requirement, and is easy to be damaged by water power in the operation process, especially under the conditions of high sand content, abnormal operation working condition and the like. The main rail section of the access slot is destroyed mainly by the following modes: the embedded parts such as the sealing plate, the corner protection plate and the like are washed away, and the second-stage concrete on the back parts of the main rail, the sealing plate and the corner protection plate is washed away to form a large pit, so that the integral safety of the door slot structure is seriously influenced. In view of the fact that the embedded parts of the main rail section of the access door slot are communicated with the reservoir, the distance between the lower flange of the door leaf and the main rail is very close (generally about 90 mm) in the water retaining state, the space is narrow, the repairing difficulty is high, the repairing is difficult to achieve according to the original construction period design scheme, secondary damage is likely to be caused by a little careless in the repairing process, and serious threat is caused to the safety of the dam structure.
Disclosure of Invention
The invention mainly aims to provide a repairing method for a main rail section embedded part of a main rail section of a main access door slot of a dam mesoporous accident, wherein the damaged corner guard plate part is repaired by backfilling modified epoxy mortar, the damaged sealing plate part is restored to a sealing plate structure by planting ribs, and a high-strength shrinkage-free grouting material is filled behind the sealing plate.
In order to achieve the technical characteristics, the aim of the invention is realized in the following way: a method for repairing a main rail section embedded part of a main rail section of a dam mesopore accident access door slot comprises the following steps:
firstly, performing water seal repair or replacement in advance according to the leakage condition of a flood discharge mesopore to be repaired, and putting an access door slot into the bottom of the door slot for water blocking according to an operation rule after checking and accepting agreement by a supervision engineer;
step two, after the access door slot is used for retaining water, opening an arc-shaped working door to release water flow in the flow channel according to requirements;
step three, a construction channel is erected, a middle hole hoist chamber enters a runner, a water pump is required to be arranged for pumping water for the downstream upwarp runner, the runner is kept free of accumulated water, and the step of a flat-bottom runner can be skipped;
checking the water leakage condition of the door leaves, plugging the water leakage position of the door leaves by using cotton wool, sand bags and steel plates, guiding water flow at the top of the gate into the gate drain hole, discharging the water flow to the bottom of the gate, and integrally covering the gate by using waterproof canvas;
setting up a bent frame at the position of one side of the door slot, which is damaged and needs to be repaired, covering the bent frame by adopting a waterproof cloth to ensure that the bent frame is in a dry state, setting a water retaining cofferdam according to the actual water seepage condition of a field door body, firstly stacking the water retaining cofferdam by adopting yellow mud bags to form a temporary water retaining weir, and then building the water retaining cofferdam by using bricks when the water level of a door slot repairing construction area is reduced to the lowest state, wherein cement mortar is smeared at the bottom and the periphery of the water retaining cofferdam; the bent frame is erected in a repair area to arrange ventilation drying measures, so that the construction environment in the door slot repair construction area is not interfered by water flow and water vapor; the steel lining bottom of the construction part needs to be integrally paved with a protective rubber pad to prevent the steel lining from being damaged in the repairing process;
step six, planting bars at the damaged part of the downstream side sealing plate of the main rail cast steel rail, wherein the bar planting holes are constructed in a rotary mode, the bar planting holes are hot rolled common bars with ribs, the bar planting depth is required to meet the pulling resistance requirement, and the exposed length is required to meet the welding length recovery requirement with the sealing plate; the outer contour of the lower sealing plate is led out through a hanging wire by utilizing a door slot corner protection plate with the upper part not being washed out, and is used for measuring, drilling and fixing the planted bar, and then the planted bar is fixed by adopting planted bar glue or adhesive;
step seven, manufacturing according to the design requirement and the size of the sealing plate of the damaged part measured in the step six, taking a joint as a unit, keeping the material of the sealing plate consistent with the original material before damage, manufacturing the material of the end plate as a steel plate, hanging wires at the position of the sealing plate after the bar planting is finished, measuring and recording the bar planting position, the interval row distance, the width of the sealing plate and the width of the end plate, and blanking, beveling and drilling the sealing plate and the end plate according to the measured data; the holes on the sealing plate, which correspondingly penetrate through the positions of the bar planting holes, are determined according to the bar planting condition, and the diameters of the holes on the sealing plate are not more than 36mm; before the sealing plate is lifted, a lifting lug is welded at the top of the back of the sealing plate and used for lifting the sealing plate in place;
step eight, chiseling loose parts on the surface of the concrete after the bar planting is completed, and cleaning the pollutants and loose particles at the chiseled parts by using an angle grinder or a steel wire wheel; blowing off sand grains and dust on the surface by using compressed air, flushing by using compressed water to clean the concrete surface without dust, and finally, flushing by using air drying and compressed air to dry the concrete surface;
step eight, after the reinforcement planting and the roughening of the concrete surface are completed, mounting the sealing plates, hoisting the sealing plates in place from bottom to top in sequence, and before the final section of sealing plates is mounted, measuring the relevant size of the arc-shaped angle bead at the top, manufacturing a paperboard mould on site, and blanking and trimming the sealing plates in a gold knot factory according to the measured data and the mould; the hoisting adopts the arrangement of a chain block and the assistance of a winch for traction, and is positioned by manual assistance; after each sealing plate is hoisted in place, the bar planting holes of the sealing plate are penetrated by bar planting, the bar planting holes are penetrated by the sealing plate, threads are processed at the end parts of the bar planting holes, the gaps at the two ends and the bottom of the sealing plate are adjusted, spot welding is performed after the adjustment is finished, a locking plate is added for welding and reinforcing, and finally, the bar planting plate and the bolts are screwed up, and then the next sealing plate is hoisted; the method comprises the steps of firstly welding internode transverse joints when the sealing plates are welded, then welding the contact positions of the sealing plates and the steel lining, then welding the welding joints of the cast steel track backing plates, finally welding the welding joints of the contact positions of the bottom sill position and the top steel lining angle bead, and performing joint filling treatment on a gap of 5-7 mm reserved between the sealing plates at the non-falling positions of the angle bead plates and the main rail angle bead plates by using epoxy mortar; after the sealing plate is welded, backfilling the back cavity by adopting a high-strength shrinkage-free grouting material, removing the backing plate and the nuts after solidification, cutting off the part of the sealing plate, which is leaked by the embedded bars, cutting off and polishing the embedded bars until the embedded bars are at the bottom of the sealing plate for a certain length, connecting the embedded bars with the sealing plate by adopting a plug welding mode, protecting the surface by adopting stainless steel, and polishing and flattening after welding; the bending and breaking of the cast steel track backing plate are required to be cut to the installation position, and the cast steel track backing plate is tightly welded with the end plate of the sealing plate after being corrected;
step nine, after each 1 sealing plate is installed, taking the sealing plate as a template, filling a cavity and a gap at the back of the sealing plate with a high-strength shrinkage-free grouting material, wherein the final sealing plate is shorter than the original design sealing plate, and filling with the high-strength shrinkage-free grouting material by adopting a top reserved opening after installation; in the pouring process, the pouring condition is observed by taking the opening of the upper sealing plate as an observation hole, and the pouring condition is temporarily sealed by gauze; carrying out emptying inspection after flood, carrying out chemical grouting on the emptying part, and then carrying out welding sealing;
step ten, after backfilling the cavity behind the sealing plate by adopting a high-strength shrinkage-free grouting material, dismantling the backing plate and the nuts after solidification, cutting off the part of the sealing plate, cutting off and polishing the dowel bar until the dowel bar is at the bottom of a certain length on the surface of the sealing plate, connecting the reinforcing bar with the sealing plate by adopting a plug welding mode, protecting the surface by adopting stainless steel, polishing after welding to be smooth, cutting the backing plate with bending and breaking of a cast steel rail to an installation position, and welding with the sealing plate end plate in a close manner after correction;
step eleven, backfilling the damaged areas on the outer side of the main rail track of the door slot and the upstream side of the end plate of the sealing plate by using epoxy mortar, repeatedly brushing a thin layer of epoxy interface agent after cleaning the surfaces of the cast steel track and the attached concrete, and paving the epoxy mortar before initial setting after eliminating bubbles in the epoxy interface agent, wherein a shaping plastic template is arranged on the outer side of the backfilling repair range of the epoxy mortar and is used as an outer template, and the plastic template is reinforced by adopting an outer hoop-shaped steel bar purlin enclosing mode; the shaping plastic template has good demoulding performance with the epoxy mortar, and the epoxy mortar which has completely lost plasticity is not damaged during demoulding; each layer of modified epoxy mortar is paved with a thickness not more than 2cm, and is compacted and trowelled with force, and when the epoxy mortar of the previous construction layer completely loses plasticity and is not deformed, the next construction can be carried out; adopting 2-4 templates installed for the first time, and then carrying out block-by-block overturning construction;
step twelve, after the construction of coating the epoxy mortar is finished, the shaping plastic template is completely demoulded, the base surface is kept clean, a high weather-resistant epoxy anti-abrasion coating is scraped by a scraper, the scraping thickness of the coating is controlled, the scraping surface needs to be smoothed, so that the surface unevenness requirement is met, and the shape of an overflow surface after the construction of the scraping high weather-resistant epoxy anti-abrasion coating is finished is consistent with that of an overflow surface designed by an original main rail sealing plate; after the construction of the epoxy mortar and the anti-abrasion coating material is finished, the epoxy mortar and the anti-abrasion coating material are ensured not to contact with exposed water in 1d, and natural curing is carried out for at least 3d; after the construction is finished, the direct collision of the sharp part of the end head of the steel component and the angle of the pedal is avoided.
Preferably, V-shaped grooves are required to be polished at the welding positions of the spliced welding sealing plates and the end plates, the angles of the sealing plates and the end plates are 95-100 ℃, after the welding is completed, spot welding is performed, the locking plates are added for welding reinforcement, during welding, an A3.2mm stainless steel welding rod is used for bottoming, an A4.0mm stainless steel welding rod is used for formal welding, and polishing and leveling are required after welding; the inner side is a fillet weld with the diameter of 10mm, and the welding is performed by using an A4.0mm stainless steel welding rod, so that the inner side and the outer side are required to be symmetrically welded, and the deformation during welding is prevented.
Preferably, the welding line position of the sealing plate and the steel lining is polished and beveled, a gap of 1mm-2mm is reserved between the sealing plate and the steel lining when the sealing plate is installed, spot welding is fixed after the adjustment is finished, a locking plate is added for welding reinforcement, an A3.2mm stainless steel welding rod is used for welding and bottoming when welding, an A4.0mm stainless steel welding rod is used for formal welding, and polishing and leveling are needed after welding.
Preferably, the V-shaped groove is polished at the butt welding seam position of the sealing plate and the sealing plate, a gap of 1mm-2mm is reserved between the sealing plate and the steel lining when the sealing plate is installed, spot welding is fixed after adjustment is finished, a locking plate is added for welding reinforcement, an A3.2mm stainless steel welding rod is used for welding and bottoming when welding, an A4.0mm stainless steel welding rod is used for formally welding, and polishing and leveling are needed after welding.
Preferably, the stainless steel electrode is a CHS2209 stainless steel electrode.
Preferably, before backfilling the epoxy mortar, the concrete and rust impurities remained on the cast steel rail are thoroughly removed, the base surface is ensured to be dry, the metallic luster is exposed, and the cast steel rail is cleaned by dipping the defatted cotton in acetone.
Preferably, in the fifth step, the water retaining cofferdam has a cross-sectional width x height of 25cm x 80cm.
Preferably, the ventilation drying measure adopts a fan air compressor for ventilation or an iodine tungsten lamp for roasting.
Preferably, in the sixth step, the row spacing between the bar planting holes is 500 mm; the planted bars adopt HRB335 hot rolled ribbed common bars, the diameter of the bars is 28mm, and the diameter of the planted bar holes is 50mm; the pulling resistance of the single implanted bar is not less than 222kN.
Preferably, in the seventh step, the end plate is made of a steel plate made of Q235B.
Preferably, in the eighth step and the tenth step, the bar planting passes through the sealing plate, the exposed length is 90mm-110mm, and the end part of the bar planting is processed with M24 threads; the bar planting is cut off and polished until the bottom is 4mm above the surface of the sealing plate.
Preferably, in the step nine, the final sealing plate is 100mm shorter than the original sealing plate.
Preferably, in the eleventh step, the thin epoxy interface agent is thin and uniform, and has a thickness of 0.1mm to 0.2mm.
Preferably, in the eleventh step, the width of the single-piece shaping plastic template is 30cm.
The invention has the following beneficial effects:
1. according to the invention, the damaged corner guard plate part is repaired by backfilling the modified epoxy mortar, so that higher strength can be obtained quickly, the repair can be completed, smooth transition and smooth water flow are ensured, and erosion to the door groove is reduced;
2. according to the invention, the damaged sealing plate part is restored to the sealing plate structure through the planted bars, and the high-strength shrinkage-free grouting material is filled behind the sealing plate, so that the sealing plate and the second-stage concrete original state can be maximally approached, the main rail section structure of the accident access door slot is also reinforced, the repairing efficiency and quality are improved under the condition of ensuring the operation safety of the door slot, the operation safety of the dam in the flood period is further ensured, and the dam has great economic benefit.
Drawings
The invention is further described below with reference to the drawings and examples.
Fig. 1 is a view of the inside of a closure plate assembly of the present invention.
FIG. 2 is a rotated view of the I-I of FIG. 1 in accordance with the present invention.
FIG. 3 is a rotated view of II-II of FIG. 1 in accordance with the present invention.
Fig. 4 is a rotated view of fig. 1 in III-III in accordance with the present invention.
Fig. 5 is a partial view of fig. 2 a in accordance with the present invention.
Fig. 6 is a partial view of the grouting material of fig. 2 before filling B according to the present invention.
Fig. 7 is a partial view of the grouting material of fig. 2 after filling B according to the present invention.
Fig. 8 is a partial view of C of fig. 4 in accordance with the present invention.
Fig. 9 is a partial view of D of fig. 4 in accordance with the present invention.
FIG. 10 is a schematic illustration of the present invention and a front view of the sealing plate.
FIG. 11 is view 1-1 of FIG. 10 in accordance with the present invention.
Fig. 12 is an enlarged view of a portion E of fig. 11 in accordance with the present invention.
FIG. 13 is a view of the weld of the in-plant welded closure plate to the end plate of the present invention.
FIG. 14 is a view of a seal of the present invention with a steel liner.
Fig. 15 is a view of a butt weld of a closure plate of the present invention to the closure plate.
In the figure: the main rail 1, a steel liner 2, a sealing plate 3, a corner protection plate 4, secondary concrete 5, primary concrete 6, a first section repairing sealing plate 301, a second section repairing sealing plate 302, a third section repairing sealing plate 303, a fourth section repairing sealing plate 304, epoxy mortar 7, a high-strength shrinkage-free grouting material 8, a bar planting 9 and a bar planting hole 10.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1-15, a method for repairing a main rail section embedded part of a main rail section of a dam mesopore accident access door slot comprises the following steps:
firstly, performing water seal repair or replacement in advance according to the leakage condition of a flood discharge mesopore to be repaired, and putting an access door slot into the bottom of the door slot for water blocking according to an operation rule after checking and accepting agreement by a supervision engineer;
step two, after the access door slot is used for retaining water, opening an arc-shaped working door to release water flow in the flow channel according to requirements;
step three, a construction channel is erected, a middle hole hoist chamber enters a runner, a water pump is required to be arranged for pumping water for the downstream upwarp runner, the runner is kept free of accumulated water, and the step of a flat-bottom runner can be skipped;
checking the water leakage condition of the door leaves, plugging the water leakage position of the door leaves by using cotton wool, sand bags and steel plates, guiding water flow at the top of the gate into the gate drain hole, discharging the water flow to the bottom of the gate, and integrally covering the gate by using waterproof canvas;
setting up a bent frame at the position of one side of the door slot, which is damaged and needs to be repaired, covering the bent frame by adopting a waterproof cloth to ensure that the bent frame is in a dry state, setting a water retaining cofferdam according to the actual water seepage condition of a field door body, firstly stacking the water retaining cofferdam by adopting yellow mud bags to form a temporary water retaining weir, and then building the water retaining cofferdam by using bricks when the water level of a door slot repairing construction area is reduced to the lowest state, wherein cement mortar is smeared at the bottom and the periphery of the water retaining cofferdam; the bent frame is erected in a repair area to arrange ventilation drying measures, so that the construction environment in the door slot repair construction area is not interfered by water flow and water vapor; the bottom of the steel lining 2 at the construction part is required to be integrally paved with a protective rubber pad, so that the steel lining 2 is prevented from being damaged in the repairing process;
step six, planting bars at the damaged part of the downstream side sealing plate 3 of the cast steel rail of the main rail 1, wherein the bar planting holes 10 are constructed in a rotary mode, the bar planting 9 is a hot rolled ribbed common bar, the depth of the bar planting 9 is required to meet the pulling resistance requirement, and the exposed length is required to be in a welding length recovery with the sealing plate 3; the outer contour of the lower sealing plate is led out through a hanging wire by utilizing a door slot corner protection plate 4 with the upper part not being washed out, and is used for measuring, drilling and fixing the bar planting 9, and then the bar planting glue or the adhesive is adopted for fixing;
step seven, manufacturing according to the size of the damaged part sealing plate 3 measured in the step six by taking a joint as a unit according to design requirements, manufacturing the sealing plate material to be consistent with the original material before damage, manufacturing the end plate material to be a steel plate, hanging wires at the sealing plate position after the bar planting is finished, measuring and recording the bar planting position, the interval row distance, the sealing plate width and the end plate width, and blanking the sealing plate and the end plate, chamfering and drilling according to measured data; the holes on the sealing plate 3, which correspondingly penetrate through the positions of the bar planting 9, are determined according to bar planting conditions, and the diameters of the holes on the sealing plate are not more than 36mm; before the sealing plate 3 is lifted, a lifting lug is welded at the top of the back of the sealing plate and used for lifting the sealing plate in place;
step eight, chiseling loose parts on the surface of the concrete after the bar planting 9 is completed, and cleaning the pollutants and loose particles at the chiseled parts by using an angle grinder or a steel wire wheel; blowing off sand grains and dust on the surface by using compressed air, flushing by using compressed water to clean the concrete surface without dust, and finally, flushing by using air drying and compressed air to dry the concrete surface;
step eight, after the reinforcement planting and the roughening of the concrete surface are completed, mounting a sealing plate 3, hoisting the sealing plate in place from bottom to top in sequence, and before the last section of sealing plate is mounted, measuring the relevant size of the arc-shaped angle bead at the top, manufacturing a paperboard mould on site, and blanking and trimming the sealing plate in a gold knot factory according to measurement data and the mould; the hoisting adopts the arrangement of a chain block and the assistance of a winch for traction, and is positioned by manual assistance; after each sealing plate is hoisted in place, the bar planting 9 passes through bar planting holes 10 of the sealing plate, the bar planting 9 passes through the sealing plate, threads are processed at the end parts of the bar planting 9, temporary fixation is carried out through a base plate and bolts, gaps at two ends and the bottom of the sealing plate are adjusted, spot welding fixation is carried out after the adjustment is finished, a locking plate is added for welding reinforcement, and finally, a bar inserting base plate and bolts are screwed up, and then hoisting of the next sealing plate is carried out; the method comprises the steps of firstly welding internode transverse joints when the sealing plates are welded, then welding the contact positions of the sealing plates and the steel lining 2, then welding the welding joints of the cast steel rail backing plates, finally welding the welding joints of the contact positions of the bottom sill position and the corner protector of the top steel lining 2, and performing joint filling treatment on the gap of 5-7 mm reserved between the sealing plates of the non-falling parts of the corner protector plates 4 and the main rail corner protector plates by using epoxy mortar 7; after the sealing plate is welded, backfilling the back cavity by adopting a high-strength shrinkage-free grouting material 8, dismantling a backing plate and a nut after solidification, cutting off a sealing plate part where the embedded ribs 9 leak, cutting off and polishing the embedded ribs 9 until the embedded ribs are at the bottom of a certain length on the surface of the sealing plate, connecting the embedded ribs 9 with the sealing plate by adopting a plug welding mode, protecting the surface by adopting stainless steel, and polishing and flattening after welding; the bending and breaking of the cast steel track backing plate are required to be cut to the installation position, and the cast steel track backing plate is tightly welded with the end plate of the sealing plate after being corrected;
step nine, after each 1 sealing plate is installed, taking the sealing plate as a template, filling a cavity and a gap at the back of the sealing plate with a high-strength shrinkage-free grouting material 8, wherein the final sealing plate is shorter than the original design sealing plate, and filling with the high-strength shrinkage-free grouting material 8 by adopting a top reserved opening after installation; in the pouring process, the pouring condition is observed by taking the opening of the upper sealing plate as an observation hole, and the pouring condition is temporarily sealed by gauze; carrying out emptying inspection after flood, carrying out chemical grouting on the emptying part, and then carrying out welding sealing;
step ten, after backfilling the cavity behind the sealing plate by adopting a high-strength shrinkage-free grouting material 8, dismantling the backing plate and the nuts after solidification, cutting off the part of the sealing plate, cutting off and polishing the dowel bar until the dowel bar is at the bottom of a certain length on the surface of the sealing plate, connecting the dowel bar with the sealing plate by adopting a plug welding mode, protecting the surface by adopting stainless steel, polishing after welding to be smooth, cutting the bending and breaking of the cast steel track backing plate to an installation position, correcting and welding with the sealing plate end plate in a close manner;
step eleven, backfilling the damaged areas on the outer side of the main rail track of the door slot and the upstream side of the end plate of the sealing plate by using epoxy mortar 7, repeatedly brushing a thin layer of epoxy interface agent after cleaning the surfaces of the cast steel track and the attached concrete, and paving the epoxy mortar before initial setting after eliminating bubbles in the epoxy interface agent, wherein a shaping plastic template is arranged on the outer side of the backfilling repair range of the epoxy mortar and is used as an outer template, and the plastic template is reinforced by adopting an outer hoop-shaped steel bar purlin enclosing mode; the shaping plastic template has good demoulding performance with the epoxy mortar, and the epoxy mortar which has completely lost plasticity is not damaged during demoulding; each layer of modified epoxy mortar is paved with a thickness not more than 2cm, and is compacted and trowelled with force, and when the epoxy mortar of the previous construction layer completely loses plasticity and is not deformed, the next construction can be carried out; adopting 2-4 templates installed for the first time, and then carrying out block-by-block overturning construction;
step twelve, after the construction of coating the epoxy mortar is finished, the shaping plastic template is completely demoulded, the base surface is kept clean, a high weather-resistant epoxy anti-abrasion coating is scraped by a scraper, the scraping thickness of the coating is controlled, the scraping surface needs to be smoothed, so that the surface unevenness requirement is met, and the shape of an overflow surface after the construction of the scraping high weather-resistant epoxy anti-abrasion coating is finished is consistent with that of an overflow surface designed by an original main rail sealing plate; after the construction of the epoxy mortar and the anti-abrasion coating material is finished, the epoxy mortar and the anti-abrasion coating material are ensured not to contact with exposed water in 1d, and natural curing is carried out for at least 3d; after the construction is finished, the direct collision of the sharp part of the end head of the steel component and the angle of the pedal is avoided.
Example 2:
referring to FIG. 13, V-shaped grooves are required to be polished at the welding positions of the assembled welding sealing plates and the end plates, the angles between the sealing plates and the end plates are 95-100 degrees, after the adjustment, spot welding is performed, the welding plates are added for welding reinforcement, during welding, an A3.2mm stainless steel welding rod is used for priming, an A4.0mm stainless steel welding rod is used for formal welding, and polishing and leveling are required after welding; the inner side is a fillet weld with the diameter of 10mm, and the welding is performed by using an A4.0mm stainless steel welding rod, so that the inner side and the outer side are required to be symmetrically welded, and the deformation during welding is prevented.
Example 3:
referring to fig. 14, the welding seam position of the sealing plate and the steel lining 2 is polished and beveled, a gap of 1mm-2mm is reserved between the sealing plate and the steel lining 2 when the sealing plate is installed, spot welding is fixed after adjustment is completed, a locking plate is added for welding reinforcement, an A3.2mm stainless steel welding rod is used for welding and bottoming when welding, an A4.0mm stainless steel welding rod is used for formal welding, and polishing and leveling are needed after welding.
Example 4:
referring to fig. 15, V-shaped grooves are polished at butt welding positions of the sealing plates, a gap of 1mm-2mm is reserved between the sealing plates and the steel lining 2 when the sealing plates are installed, spot welding is fixed after adjustment is completed, a locking plate is added for welding reinforcement, an A3.2mm stainless steel welding rod is used for welding and bottoming, an A4.0mm stainless steel welding rod is used for formal welding, and polishing and leveling are needed after welding.
Preferably, the stainless steel electrode is a CHS2209 stainless steel electrode.
Preferably, before backfilling the epoxy mortar, the concrete and rust impurities remained on the cast steel rail are thoroughly removed, the base surface is ensured to be dry, the metallic luster is exposed, and the cast steel rail is cleaned by dipping the defatted cotton in acetone.
Preferably, in the fifth step, the water retaining cofferdam has a cross-sectional width x height of 25cm x 80cm.
Preferably, the ventilation drying measure adopts a fan air compressor for ventilation or an iodine tungsten lamp for roasting.
Preferably, in the sixth step, the row spacing between the bar planting holes 10 is 500 mm; the planted bar 9 adopts HRB335 hot rolled ribbed common steel bars, the diameter of the steel bars is 28mm, and the diameter of the planted bar drilling holes is 50mm; the pulling resistance of the single implanted bar 9 is not less than 222kN.
Preferably, in the seventh step, the end plate is made of a steel plate made of Q235B.
Preferably, in the eighth and tenth steps, the bar 9 passes through the sealing plate, the exposed length is 90mm-110mm, and the end of the bar 9 is processed with threads of M24; the bar planting 9 is cut off and polished to the bottom 4mm from the surface of the sealing plate.
Preferably, in the step nine, the final sealing plate is 100mm shorter than the original sealing plate.
Preferably, in the eleventh step, the thin epoxy interface agent is thin and uniform, and has a thickness of 0.1mm to 0.2mm.
Preferably, in the eleventh step, the width of the single-piece shaping plastic template is 30cm.
Example 5:
in this example, the main performance parameters of the epoxy cross-section agent used are shown in Table 4-1, the main performance indexes of the modified epoxy mortar are shown in Table 4-2, and the main performance indexes of the high weather-resistant epoxy impact-resistant wear-resistant coating are shown in Table 4-3.
TABLE 4-1 Main Performance parameter Table for epoxy interface agent
| Sequence number | Project | Unit (B) | |
| 1 | Drying time (surface dry) | min | ＜360 |
| 2 | Bond strength with concrete (7 d) | MPa | ≥3.0 |
| 3 | Tensile strength (7 d) | MPa | ≥8 |
| 4 | Tensile shear Strength (7 d) | MPa | ≥10 |
| 5 | Compressive strength (7 d) | MPa | ≥40 |
TABLE 4-2 Main Performance index Table of modified epoxy mortar
TABLE 4-3 Main Performance index Table of high weather resistant epoxy abrasion resistant coating
Example 6:
high-strength shrinkage-free grouting material mixing proportion:
Claims (10)
1. a method for repairing a main rail section embedded part of a main rail section of a dam mesopore accident access door slot is characterized by comprising the following steps:
firstly, performing water seal repair or replacement in advance according to the leakage condition of a flood discharge mesopore to be repaired, and putting an access door slot into the bottom of the door slot for water blocking according to an operation rule after checking and accepting agreement by a supervision engineer;
step two, after the access door slot is used for retaining water, opening an arc-shaped working door to release water flow in the flow channel according to requirements;
step three, a construction channel is erected, a middle hole hoist chamber enters a runner, a water pump is required to be arranged for pumping water for the downstream upwarp runner, the runner is kept free of accumulated water, and the step of a flat-bottom runner can be skipped;
checking the water leakage condition of the door leaves, plugging the water leakage position of the door leaves by using cotton wool, sand bags and steel plates, guiding water flow at the top of the gate into the gate drain hole, discharging the water flow to the bottom of the gate, and integrally covering the gate by using waterproof canvas;
setting up a bent frame at the position of one side of the door slot, which is damaged and needs to be repaired, covering the bent frame by adopting a waterproof cloth to ensure that the bent frame is in a dry state, setting a water retaining cofferdam according to the actual water seepage condition of a field door body, firstly stacking the water retaining cofferdam by adopting yellow mud bags to form a temporary water retaining weir, and then building the water retaining cofferdam by using bricks when the water level of a door slot repairing construction area is reduced to the lowest state, wherein cement mortar is smeared at the bottom and the periphery of the water retaining cofferdam; the bent frame is erected in a repair area to arrange ventilation drying measures, so that the construction environment in the door slot repair construction area is not interfered by water flow and water vapor; the bottom of the steel lining (2) at the construction part is required to be integrally paved with a protective rubber pad, so that the steel lining (2) is prevented from being damaged in the repairing process;
step six, planting bars at the damaged part of the downstream side sealing plate (3) of the cast steel rail of the main rail (1), wherein the bar planting holes (10) are constructed in a rotary mode, the bar planting holes (9) are hot rolled common steel bars with ribs, the depth of the bar planting holes (9) is required to meet the pulling resistance requirement, and the exposed length is required to be in welding length recovery with the sealing plate (3); the outer contour of the lower sealing plate is led out through a hanging wire by utilizing a door slot corner protection plate (4) with the upper part not being washed out, and is used for measuring, drilling and fixing a bar planting (9) by using bar planting glue or an adhesive after finishing fixing;
step seven, manufacturing according to the size of the damaged part sealing plate (3) measured in the step six by taking a joint as a unit according to design requirements, manufacturing a sealing plate material which is consistent with the original material before damage, manufacturing an end plate material which is a steel plate, hanging wires at the sealing plate position after the reinforcement implantation is completed, measuring and recording the reinforcement implantation position, the interval row distance, the sealing plate width and the end plate width, and then blanking, chamfering and drilling the sealing plate and the end plate according to the measured data; the holes on the sealing plate (3) which correspondingly pass through the positions of the bar planting (9) are determined according to the bar planting condition, and the diameters of the holes on the sealing plate are not more than 36mm; before the sealing plate (3) is lifted, a lifting lug is welded at the top of the back of the sealing plate and used for lifting the sealing plate in place;
step eight, chiseling loose parts on the surface of the concrete after the bar planting (9) is completed, and cleaning pollutants and loose particles at the chiseled parts by using an angle grinder or a steel wire wheel; blowing off sand grains and dust on the surface by using compressed air, flushing by using compressed water to clean the concrete surface without dust, and finally, flushing by using air drying and compressed air to dry the concrete surface;
step eight, after the reinforcement planting and the roughening of the concrete surface are completed, mounting a sealing plate (3), hoisting the sealing plate in place from bottom to top in sequence, measuring the relevant size of the arc-shaped angle bead at the top before the final sealing plate is mounted, manufacturing a paperboard mould on site, and blanking and trimming the sealing plate in a gold knot factory according to the measured data and the mould; the hoisting adopts the arrangement of a chain block and the assistance of a winch for traction, and is positioned by manual assistance; after each sealing plate is hoisted in place, firstly, a bar planting hole (10) of the sealing plate is penetrated through by a bar planting (9), the sealing plate is penetrated by the bar planting (9), threads are processed at the end part of the bar planting (9), the gap at the two ends of the sealing plate and the gap at the bottom are adjusted through a backing plate and a bolt, spot welding is carried out after the adjustment is finished, a locking plate is welded and reinforced, and finally, a bar inserting backing plate and the bolt are screwed up, and then the next sealing plate is hoisted; the method comprises the steps of firstly welding internode transverse joints when the sealing plates are welded, then welding the contact positions of the sealing plates and the steel lining (2), then welding the welding joints of the cast steel rail backing plates, finally welding the welding joints of the contact positions of the bottom sill positions and the corner protectors of the top steel lining (2), and performing joint filling treatment on 5-7 mm gaps reserved between the sealing plates at the non-falling positions of the corner protectors (4) and the main rail corner protectors by using epoxy mortar (7); backfilling a back cavity by adopting a high-strength shrinkage-free grouting material (8) after the sealing plate is welded, removing a backing plate and nuts after solidification, cutting off a sealing plate part where the embedded ribs (9) leak, cutting off and polishing the embedded ribs (9) until the embedded ribs are at the bottom of the sealing plate surface by a certain length, connecting the embedded ribs (9) with the sealing plate by adopting a plug welding mode, protecting the surface by adopting stainless steel, and polishing after welding; the bending and breaking of the cast steel track backing plate are required to be cut to the installation position, and the cast steel track backing plate is tightly welded with the end plate of the sealing plate after being corrected;
step nine, after each 1 sealing plate is installed, taking the sealing plate as a template, filling a cavity and a gap at the back of the sealing plate with a high-strength shrinkage-free grouting material (8), wherein the final sealing plate is shorter than the original design sealing plate, and filling with the high-strength shrinkage-free grouting material (8) by adopting a top reserved opening after installation; in the pouring process, the pouring condition is observed by taking the opening of the upper sealing plate as an observation hole, and the pouring condition is temporarily sealed by gauze; carrying out emptying inspection after flood, carrying out chemical grouting on the emptying part, and then carrying out welding sealing;
step ten, backfilling the cavity behind the sealing plate by adopting a high-strength shrinkage-free grouting material (8), dismantling the backing plate and the nuts after solidification, removing the part of the sealing plate, cutting off and polishing the inserted bars until the inserted bars are at the bottom of a certain length on the surface of the sealing plate, connecting the reinforced bars with the sealing plate by adopting a plug welding mode, protecting the surface by adopting stainless steel, polishing after welding to be smooth, cutting the bent and broken cast steel rail backing plate to an installation position, correcting and welding with the sealing plate end plate in a close manner;
step eleven, backfilling the damaged areas on the outer side of the main rail track of the door slot and the upstream side of the end plate of the sealing plate by using epoxy mortar (7), repeatedly brushing a thin layer of epoxy interface agent after cleaning the surfaces of the cast steel track and the attached concrete, and paving the epoxy mortar before initial setting after eliminating bubbles in the epoxy interface agent, wherein a shaping plastic template is arranged on the outer side of the backfilling repair range of the epoxy mortar and is used as an outer template, and the plastic template is reinforced by adopting an outer hoop-shaped steel bar enclosing purlin; the shaping plastic template has good demoulding performance with the epoxy mortar, and the epoxy mortar which has completely lost plasticity is not damaged during demoulding; each layer of modified epoxy mortar is paved with a thickness not more than 2cm, and is compacted and trowelled with force, and when the epoxy mortar of the previous construction layer completely loses plasticity and is not deformed, the next construction can be carried out; adopting 2-4 templates to be installed for the first time, and then carrying out block-by-block overturning construction;
step twelve, after the construction of coating the epoxy mortar is finished, the shaping plastic template is completely demoulded, the base surface is kept clean, a high weather-resistant epoxy anti-abrasion coating is scraped by a scraper, the scraping thickness of the coating is controlled, the scraping surface needs to be smoothed, so that the surface unevenness requirement is met, and the shape of an overflow surface after the construction of the scraping high weather-resistant epoxy anti-abrasion coating is finished is consistent with that of an overflow surface designed by an original main rail sealing plate; after the construction of the epoxy mortar and the anti-abrasion coating material is finished, the epoxy mortar and the anti-abrasion coating material are ensured not to contact with exposed water in 1d, and natural curing is carried out for at least 3d; after the construction is finished, the direct collision of the sharp part of the end head of the steel component and the angle of the pedal is avoided.
2. A method for repairing a main rail section embedded part of a dam mesopore accident access door slot as recited in claim 1, wherein the method comprises the following steps: the welding joint position of the assembled welding sealing plate and the end plate needs to be polished to form a V-shaped groove, the angle between the sealing plate and the end plate is 95-100 degrees, after the adjustment, spot welding is carried out, the welding plate is added for welding reinforcement, when welding, an A3.2mm stainless steel welding rod is used for priming, an A4.0mm stainless steel welding rod is used for formal welding, and polishing and leveling are needed after welding; the inner side is a fillet weld with the diameter of 10mm, and the welding is performed by using an A4.0mm stainless steel welding rod, so that the inner side and the outer side are required to be symmetrically welded, and the deformation during welding is prevented.
3. A method for repairing a main rail section embedded part of a dam mesopore accident access door slot as recited in claim 1, wherein the method comprises the following steps: the welding seam position of the sealing plate and the steel lining (2) is polished and beveled, a gap of 1mm-2mm is reserved between the sealing plate and the steel lining (2) when the sealing plate is installed, spot welding is fixed after adjustment is finished, a locking plate is added for welding reinforcement, an A3.2mm stainless steel welding rod is used for welding and bottoming when welding, an A4.0mm stainless steel welding rod is used for formal welding, and polishing and leveling are needed after welding.
4. A method for repairing a main rail section embedded part of a dam mesopore accident access door slot as recited in claim 1, wherein the method comprises the following steps: the V-shaped groove is polished at the butt welding seam position of the sealing plate and the sealing plate, a gap of 1mm-2mm is reserved between the sealing plate and the steel lining (2) during installation, spot welding is fixed after adjustment is finished, a locking plate is added for welding reinforcement, an A3.2mm stainless steel welding rod is used for welding and bottoming during welding, an A4.0mm stainless steel welding rod is used for formal welding, and polishing and leveling are needed after welding.
5. A method of repairing a main rail section of a main access door slot for a hole accident in a dam according to claim 2, 3 or 4, wherein: the stainless steel welding electrode adopts CHS2209 stainless steel welding electrode.
6. A method for repairing a main rail section embedded part of a dam mesopore accident access door slot as recited in claim 1, wherein the method comprises the following steps: before backfilling the epoxy mortar, the concrete and rust impurities remained on the cast steel rail are thoroughly removed, the base surface is ensured to be dry, the metallic luster is exposed, and the steel rail is cleaned by dipping the degreased cotton in acetone.
7. A method for repairing a main rail section embedded part of a dam mesopore accident access door slot as recited in claim 1, wherein the method comprises the following steps: in the fifth step, the dimension of the cross section width multiplied by the height of the water retaining cofferdam is 25cm multiplied by 80cm;
the ventilation drying measures adopt a fan air compressor for ventilation or an iodine tungsten lamp for roasting.
8. A method for repairing a main rail section embedded part of a dam mesopore accident access door slot as recited in claim 1, wherein the method comprises the following steps: in the step six, the row spacing between the bar planting holes (10) is arranged according to 500 mm; the bar planting (9) adopts HRB335 hot rolled ribbed common steel bars, the diameter of the steel bars is 28mm, and the diameter of the bar planting drill holes is 50mm; the pulling resistance of the single implanted bar (9) is not less than 222kN.
9. A method for repairing a main rail section embedded part of a dam mesopore accident access door slot as recited in claim 1, wherein the method comprises the following steps: in the seventh step, the end plate is manufactured according to a steel plate made of Q235B;
in the eighth step and the tenth step, the bar (9) passes through the sealing plate, the exposed length is 90mm-110mm, and the end part of the bar (9) is processed with M24 threads; the bar planting (9) is cut off and polished until the bottom of the bar planting is 4mm away from the surface of the sealing plate;
in the step nine, the last sealing plate is 100mm shorter than the original design sealing plate.
10. A method for repairing a main rail section embedded part of a dam mesopore accident access door slot as recited in claim 1, wherein the method comprises the following steps: in the eleventh step, the thin epoxy interface agent is thin and uniform, and the thickness is 0.1mm-0.2 mm;
in the eleventh step, the width of the single shaping plastic template is 30cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310394226.3A CN116411573A (en) | 2023-04-13 | 2023-04-13 | Method for repairing main rail section embedded part of main rail section of dam mesopore accident access door slot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310394226.3A CN116411573A (en) | 2023-04-13 | 2023-04-13 | Method for repairing main rail section embedded part of main rail section of dam mesopore accident access door slot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116411573A true CN116411573A (en) | 2023-07-11 |
Family
ID=87054396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310394226.3A Pending CN116411573A (en) | 2023-04-13 | 2023-04-13 | Method for repairing main rail section embedded part of main rail section of dam mesopore accident access door slot |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116411573A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117840590A (en) * | 2024-03-07 | 2024-04-09 | 成都天成电科科技有限公司 | Method for protecting inner cavity chip during laser re-welding and laser re-welding system |
-
2023
- 2023-04-13 CN CN202310394226.3A patent/CN116411573A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117840590A (en) * | 2024-03-07 | 2024-04-09 | 成都天成电科科技有限公司 | Method for protecting inner cavity chip during laser re-welding and laser re-welding system |
| CN117840590B (en) * | 2024-03-07 | 2024-06-04 | 成都天成电科科技有限公司 | Method for protecting inner cavity chip during laser re-welding and laser re-welding system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101372749B1 (en) | Multi-performance functional water stop plate with composite structure | |
| CN107859064B (en) | Waterproof structure for connection of prefabricated pipe gallery and cast-in-situ pipe gallery and construction method | |
| CN112324475A (en) | Method for reinforcing shield tunnel lining structure | |
| CN107326868A (en) | A kind of large reservoir concrete dam body fracture plugging method | |
| CN110388531B (en) | Reinforcing structure and reinforcing method for pipeline | |
| CN110805455A (en) | Tunnel disease comprehensive treatment method | |
| CN116411573A (en) | Method for repairing main rail section embedded part of main rail section of dam mesopore accident access door slot | |
| CN110306600B (en) | Underground engineering deformation joint leakage stopping structure and method thereof | |
| CN109236322B (en) | Artificial bottom plate for preventing soft rock roadway floor heave and construction and maintenance method thereof | |
| CN111749279A (en) | Waterproof construction method for construction joint with combined design of water-stop steel plate and anti-crack reinforcing steel bar | |
| CN109736340A (en) | A kind of sole plate reserves the dewatering device and method of dewatering well guarantee bed course integrality | |
| CN111648787A (en) | Method for reinforcing shield tunnel lining structure by adopting ultra-high performance concrete | |
| CN109025338B (en) | Method for repairing reinforced concrete wall crack | |
| CN210288284U (en) | Dual water stop system connected with new and old water outlet box culvert | |
| CN110205988A (en) | It is a kind of to be discharged the dual water-stopping system and its construction technology that box culvert is connect with new and old | |
| CN210510729U (en) | Reinforcing and reinforcing structure of pipeline | |
| CN112593726A (en) | Anti-frost heaving leaking stoppage and reinforcement method for cold region | |
| CN113062313A (en) | Prefabricated pile tip suitable for high water level area and construction method thereof | |
| CN112281768A (en) | Method for repairing spillway high-speed water flow deep large pit | |
| CN112211230A (en) | Steel plate mortar brick composite structure and method for repairing leakage of concrete structure by using same | |
| CN112195970A (en) | River-crossing tunnel engineering waterproof construction method | |
| CN206419039U (en) | A kind of tunnel-liner is seriously come to nothing rhegma Defects Treatment structure | |
| CN205296105U (en) | Field irrigation is with " U " shape concrete water conservation channel | |
| CN113914378A (en) | Method suitable for preventing water leakage during post-opening pile pressing hole pile sealing | |
| CN109736152B (en) | Gap repairing structure and repairing method between ballastless track sleeper and track slab |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |