CN113062207B - Novel repairing method for bridge pier cracks immersed under water - Google Patents
Novel repairing method for bridge pier cracks immersed under water Download PDFInfo
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- CN113062207B CN113062207B CN202110397716.XA CN202110397716A CN113062207B CN 113062207 B CN113062207 B CN 113062207B CN 202110397716 A CN202110397716 A CN 202110397716A CN 113062207 B CN113062207 B CN 113062207B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000000463 material Substances 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 238000005086 pumping Methods 0.000 claims abstract description 7
- 230000008439 repair process Effects 0.000 claims abstract description 7
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- 238000007599 discharging Methods 0.000 claims abstract description 3
- 230000008569 process Effects 0.000 claims description 18
- 229910001220 stainless steel Inorganic materials 0.000 claims description 15
- 239000010935 stainless steel Substances 0.000 claims description 15
- 238000005429 filling process Methods 0.000 claims description 12
- 230000005484 gravity Effects 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 208000037656 Respiratory Sounds Diseases 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 241001513371 Knautia arvensis Species 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 206010052428 Wound Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a novel repairing method for cracks of a pier immersed under water, which comprises the following steps: 1. bridge pier crack treatment: preliminarily cleaning the cracks of the bridge pier, covering the cracks of the bridge pier by using a rubber template, and reserving an upper side channel and a lower side channel during covering; sealing the rubber template and the surface of the pier to be repaired; 2. and (3) drainage and exhaust treatment: performing drainage treatment on the interior of the pier, and discharging liquid in the interior of the pier through a lower side channel so as to completely drain accumulated water in the crack of the pier and fill the crack with gas; then, carrying out exhaust treatment, and pumping out gas in the bridge pier through an upper side channel to form a negative pressure environment in the bridge pier cracks; 3. filling: the lower side pipeline is connected with the filling machine, the filling material can quickly fill the cracks of the bridge pier from bottom to top due to pressure difference, and when the filling material overflows from the outlet of the upper side pipeline, the bridge pier cracks are completely filled. The method can realize the underwater repair of the crack wound of the pier with any shape.
Description
Technical Field
The invention relates to a novel repairing method for cracks of a pier immersed under water, which is mainly used for repairing underwater cracks of a cross-sea bridge.
Background
With the development of technology, materials and structures, the construction which is considered impossible by people in the past becomes a reality across the sea bridge. However, since the bridge piers of the sea-crossing bridge are immersed in seawater for a long time, various loads of sea waves are received for a long time, the concrete structure at the periphery of the bridge piers is damaged, cracks appear, the strength of the bridge piers is influenced, and certain potential safety hazards are formed. In addition, the damage of the concrete structure exposes the internally wrapped steel bars in seawater, and the long-term seawater corrosion is likely to cause various corrosion of the steel bars. Therefore, timely repairing of the damaged pier is very necessary when the reinforcing steel bars are not damaged, a plurality of repairing schemes for the pier structure exist at present, but all the methods are used for repairing the pier structure on the ground (in the air), the underwater traditional repairing scheme for the pier often has a plurality of defects, the typical problem is that in the underwater repairing process, the isolation of the underwater environment and the crack internal environment of the pier is difficult to realize, a simple and effective method is not found in actual construction to realize the sealing environment, so a large amount of liquid and gas often exist in the actual repairing process, a large amount of bubble bubbles exist in the repaired structure, and the strength of the structure is greatly reduced due to the existence of the bubble bubbles.
Disclosure of Invention
The invention provides a brand-new feasible novel repairing technical method for bridge pier cracks submerged under water, the overall process comprises the covering, sealing, draining and filling processes, the repairing of bridge pier crack wounds in any shapes under water can be realized, and the repairing quality is effectively improved. A novel repairing method for cracks of a bridge pier submerged under water is characterized by comprising the following steps:
step 1, bridge pier crack treatment: firstly, primarily cleaning bridge pier cracks, covering the bridge pier cracks by using a rubber template, and reserving an upper side channel and a lower side channel during covering; and sealing the space between the rubber template and the surface of the pier to separate the cracks of the pier from water.
In the technical scheme, further, in the step 1, the bridge pier cracks are preliminarily cleaned, and foreign matters at the bridge pier cracks are mainly removed, so that all accumulated water in the bridge pier cracks can flow to the lower side channel under the action of natural gravity and a water pump.
Further, in the step 1, a rubber template is used for covering cracks of the bridge pier, an upper side channel and a lower side channel are reserved during covering, the purpose of the covering is to assist the drainage of accumulated water by utilizing natural gravity in the subsequent drainage process, and the overflow of high-position filling can be used as a judgment basis for completion of repairing by utilizing the property of gravity in the filling process. For vertically running cracks, it is easier to determine the upper side channels and the lower side channels. And for the crackle of horizontal trend, upper side passageway and downside passageway that has comparatively apparent difference in height can not necessarily be found out, can open two approximate same upper side passageways and downside passageway of level height at the both sides of horizontal trend crackle under this condition, wherein the pipeline trend of upper side passageway points to the external world by the pier crackle slant, and the pipeline trend of downside passageway points to the external world by the pier crackle slant downwards, also utilize the drainage of gravity-assisted ponding under such condition, overflow upper side passageway filler as the judgement basis of repairing the completion.
Further, the rubber template in step 1 comprises a stainless steel plate and rubber completely wrapping the stainless steel plate, wherein the stainless steel plate wrapped inside can be cylindrical surfaces or planes of other types according to the surface of the pier to be repaired, and the stainless steel plates with different shapes are used, so that the rubber edge can be attached to the surface of the pier when the rubber template is attached to the surface of the pier to be repaired. After the rubber template is attached to the surface of a pier, the stainless steel plate inside the rubber template is tightly connected with the surface of the pier by using expansion bolts, so that large pressure is generated, rubber around the stainless steel plate is compressed under the action of the pressure, and the sealing between the crack inside the pier and the peripheral liquid environment is realized.
Furthermore, the lower side channel is connected with a three-way pipe, three channels of the three-way pipe are respectively connected to the pier crack lower side channel, the water pump machine and the filling machine, and the state of the three-way pipe is controlled by the opening and closing of a valve; according to the difference of valve switching, the three-way pipe has three states: the first state is that the channel opening at the lower side of the crack of the pier is connected with a water pump, and the tee pipe is in the state in the water drainage process in the step 2; the second state is that the lower side channel is sealed and closed, and the three-way pipe is in the state in the exhaust process of the step 2; the third state is that the channel opening at the lower side of the crack of the pier is connected with a filling machine, and the tee pipe is in the state in the filling process in the step 3; the upper side channel is connected with a three-way pipe, three pipelines of the three-way pipe are respectively connected with the upper side channel with the crack of the pier, an air pump module and an atmospheric environment (or a device capable of stably providing a gas environment, such as an inflation pump), and the state of the three-way pipe is controlled by the opening and closing of a valve; according to the difference of valve switching, the three-way pipe possesses two states: the first state is that the upper side channel of the crack of the pier is connected with the atmospheric environment (or a device which can stably provide a gas environment, such as an inflating pump), and the three-way pipe is in the state in the water draining process of the step 2; and in the second state, the upper side channel of the crack of the pier is connected with the air pump module, and the three-way pipe is in the state in the air exhaust process in the step 2 and the filling process in the step 3. The air-extracting pump module consists of a pressure-resistant container and an air-extracting pump, and the pressure-resistant container is arranged between the air-extracting pump and the crack upper side channel of the pier.
Further, in step 2, during the drainage process, the pier crack upper side channel is connected with the atmosphere (or a device capable of stably providing a gas environment, such as an inflator), and the pier crack lower side channel is connected with the pier crack lower side channel water pumping machine.
Furthermore, in the step 2, after the drainage link is finished, the upper channel of the bridge pier crack is connected with an air pump, and the lower channel of the bridge pier crack is sealed and closed. Under the condition, the air pump machine of the upper side channel of the bridge pier crack works, a negative pressure environment is formed in the bridge pier crack, and the vacuum degree is about 0.01 atmosphere, namely about 0.001 MPa. It should be noted that this value is not a fixed data that is determined, but rather a parameter that is feasible for reference in the actual construction process.
Further, in the step 3, after the exhaust link is finished, in the filling link, the lower side channel valve changes the state to a third state, so that the lower side channel is connected with the filling machine, and the repairing material can rapidly fill the crack inside the whole bridge pier from bottom to top due to the pressure difference between the channel of the filling machine and the inside of the bridge pier. And when the interior of the crack of the pier is repaired, the upper side channel opening can overflow the repairing material into the pressure vessel. Therefore, the overflow material of the upper side channel opening can be used as the judgment basis for the completion of repairing, and when the overflow filler of the upper side channel opening is filled into the pressure vessel, the repair material can be proved to be tightly filled in the bridge pier cracks. It should be noted that, during the filling process, since the interior of the negative pressure environment is not completely free of gas, the filling process will reduce the volume inside the crack, so that the pressure inside the crack will increase, and the gas content inside the crack will increase. Therefore, the air-extracting pump of the crack upper side channel is matched to work in the filling process, so that the air-extracting pump of the crack upper side channel can extract the gas which can be extracted due to the fact that the pressure is increased due to the fact that the internal volume of the crack is reduced while filling, the content of the gas in the crack in the final repairing result is reduced, and the structure after repairing is prevented from generating bubbles.
The invention has the beneficial effects that:
the invention provides a bridge pier crack repairing scheme with feasibility, and provides a bridge pier crack repairing scheme which can practically realize the sealing isolation of the interior of a crack and the peripheral liquid environment and complete filling for different bridge pier surfaces aiming at the blank of the structural crack repairing scheme in the current underwater environment. Because the water drainage and the air exhaust are realized in the repairing process, the repaired structure does not contain or only contains a very small amount of bubble bubbles, so that the influence of the bubble bubbles on the structural strength is reduced to the minimum.
Drawings
The invention and its features, aspects and advantages will become more apparent from reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference symbols in the various drawings indicate like elements. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention
Fig. 1 is a flowchart of a novel repair technique for a crack of an abutment submerged under water according to an embodiment of the present invention.
Fig. 2 is a front view of an explanatory view of crack morphology of a bridge pier according to an embodiment of the present invention.
FIG. 3 is a perspective view of an explanatory view of a crack form of a bridge pier according to an embodiment of the present invention.
Fig. 4 is a front view of bridge pier cracks covering the repair devices according to the embodiment of the present invention.
Detailed Description
The structure of the present invention will be further described with reference to the accompanying drawings and specific examples, but the present invention is not limited thereto.
As shown in fig. 1, the invention discloses a novel repairing method for cracks of a pier submerged under water, and specifically, the method comprises the following steps:
step S1, bridge pier cracking: firstly, preliminary pretreatment such as cleaning is carried out on bridge pier cracks, the bridge pier cracks are covered by a rubber template, an upper side channel and a lower side channel are reserved during covering, the upper side channel is connected with a double-way pipe, and the lower side channel is connected with a three-way pipe. The expansion bolt is used for fixing the stainless steel plate inside the rubber template on the surface of the pier, due to the existence of the bolt, sufficient pressure is generated between the stainless steel plate and the surface of the pier, and the rubber wrapped around the stainless steel plate is compressed, so that the sealing isolation between the interior of a crack of the pier and the peripheral liquid environment is realized.
As shown in fig. 2 and 3, a pier crack having a vertical general direction on a cylindrical pier is shown. Wherein FIG. 2 is a front view of the bridge pier crack pattern, mainly illustrating the external configuration of the bridge pier crack. Fig. 3 is a side view of the bridge pier crack pattern, mainly for showing that the bridge pier crack has an internal depth.
In a preferred embodiment of the present invention, in step S1, the pier cracks are covered by using a rubber template, and an upper side channel and a lower side channel are reserved during the covering, wherein for the pier cracks in the vertical direction shown in fig. 2, the upper side highest point and the lower side lowest point are more obvious, the upper side highest point and the vicinity area are reserved as the upper side channel, and the lower side lowest point and the vicinity area are reserved as the lower side channel, so that a front view of the pier cracks covered by the repairing devices is obtained as shown in fig. 4.
In fig. 4, the mechanism required for the repair process is shown, which includes an upper two-position three-way valve 1, an upper passage hose 2, a rubber form 3, a lower passage hose 4, a lower three-position three-way valve 5, a water pump 6, a filler 7, a pressure vessel 8, a suction pump 9, and an inflator 10. it should be noted that the reason for using the inflator 10 here is that the device is easy to be represented in the flow chart, and the inflator 10 here can be replaced by an external atmosphere or other devices capable of stably supplying gas. Wherein two states of two position three-way valve 1 on the upside are left position respectively: connecting the upper side channel hose 2 with the inflator pump 10; right position: the upper side channel hose 2 is connected with an air-extracting pump module, wherein the air-extracting pump module consists of a pressure container 8 and an air-extracting pump 9, the connection sequence is that the upper side channel hose 2 is connected with the pressure container 8 firstly, and the pressure container 8 is connected with the air-extracting pump 9. The three states of the lower three-position three-way valve 5 are respectively left: connecting the lower side channel hose 4 with the water pump 6, and a middle position: the lower side channel hose 4 is sealed in a closed mode and is not connected with the water pumping machine 6 and the filling machine 7: the lower side passage hose 4 is connected to the filling machine 7.
In a preferred embodiment of the present invention, in step S1, the pretreatment may only include cleaning, and the main purpose is to remove foreign matters inside the bridge pier cracks and prevent the foreign matters from blocking the pipeline or each pump. It should be added in this case that, in some special cases, the occurrence of a very special structure inside the bridge pier crack may cause that the accumulated water inside the crack still cannot be cleaned under the action of natural gravity and the water pump 6, for example, when the concrete inside the crack has a bowl-shaped structure, the accumulated water inside the structure cannot be drained in the drainage process of step 2. Therefore, in step 1, the ultrasonic inspection technology can be used to know the environment of the structure inside the crack, and if no structure exists, the flow of the invention can be used. If the first case, as described above, is a situation in which the water volume is relatively large, the internal structure can be modified by using external tools, for example by drilling holes in the bottom of the structure or by breaking the structure so that it is converted to be left under the action of natural gravity and the water pump 6. The second condition is that under the condition of small water accumulation, the original structure can be modified to a certain extent, and the internal structure can not be changed, so that certain small bubbles exist in the finally repaired structure. .
Step S2, drain and exhaust treatment: and (3) performing drainage treatment on the interior of the pier, and aerating the upper side channel to discharge liquid in the pier through the lower side channel, so that accumulated water in the crack of the pier is completely discharged and filled with gas. And (4) after the drainage is finished, carrying out exhaust treatment, and exhausting air through the upper side channel so that a negative pressure environment is formed inside the crack of the pier.
In a preferred embodiment of the present invention, the step S2 specifically includes:
and step S21, converting the upper two-position three-way valve 1 into a left position and the lower three-position three-way valve 5 into a left position, and opening the water pump 6 and the air pump 10 after the structure is determined to be sealed, so that accumulated water in the bridge pier cracks flows into the water pump 6 under the action of natural gravity and the lower water pump 6, and the bridge pier cracks do not contain accumulated water any more and are filled with air.
Step S22, the upper two-position three-way valve 1 is changed to the right position, the lower three-position three-way valve is changed to the middle position, the lower passage hose 4 is closed and sealed, and the air pump 9 is opened, so that a negative pressure environment is formed in the closed space inside the bridge pier crack, and the vacuum degree is about 0.01 atmosphere, that is, about 0.001 MPa.
In a preferred embodiment of the present invention, in step S22, since a negative pressure environment is formed inside the bridge pier crack and the whole external environment is underwater, the rubber form 3 may have a certain concave inward stainless steel plate due to the pressure difference, and the whole process needs to ensure that the rubber form 3 does not crack and the sealing performance is not reduced.
Step S3, filling: and changing the state of the valve to connect the lower side pipeline with the filling machine 7, wherein due to pressure difference, the filling material can quickly fill the cracks of the bridge pier from bottom to top, no bubbles exist, the filling is tight, and finally, the filling material overflows to the pressure container 8 by observing the outlet of the upper side channel hose 2 to prove that the cracks of the bridge pier are completely filled.
In a preferred embodiment of the present invention, the step S3 specifically includes:
step S31 is to change the state of the three-position three-way valve 5 while keeping the state of the two-position three-way pipe 1 unchanged, to change the three-position three-way valve 5 to the right position, and to connect the lower-side passage hose 4 and the filling machine 7.
In step S32, since a negative pressure environment is created in the closed space inside the bridge pier crack in step S2, the filler inside the filler 7 will rapidly enter the bridge pier crack from the filler 7 through the lower passage hose 4, and since there is no water and almost no air inside the bridge pier crack, the filler will tightly fill all the space inside the bridge pier crack under the action of natural gravity, and no water bubbles or air bubbles affecting the strength are formed. Here, it should be noted that since the inside of the negative pressure environment is not completely free of gas, the filling process reduces the volume inside the crack, so that the pressure inside the crack increases, and the gas content inside the crack increases. Therefore, the air suction pump of the crack upper side channel is matched to work in the filling process, so that the air suction pump of the crack upper side channel can suck out the air which can be sucked out due to the fact that the pressure is increased due to the fact that the internal volume of the crack is reduced while filling, and therefore the content of the air in the crack in the final repairing result is reduced.
In step S33, the repair of bridge pier cracks can be determined by determining whether the upper side passage hose 2 overflows with the filler. When the upper side channel hose 2 has the filling materials overflowing, the repairing of the interior of the bridge pier crack is finished, at the moment, the filling machine 7 can be closed or the state of the three-position three-way valve 5 is changed to return to the middle position, the repairing process is finished, and subsequent cleaning and other work can be carried out.
Those skilled in the art will appreciate that variations may be implemented by those skilled in the art in combination with the prior art and the above-described embodiments, and will not be described herein in detail. Such variations do not affect the essence of the present invention and are not described herein.
The above description is of the preferred embodiment of the invention. It is to be understood that the invention is not limited to the particular embodiments described above, in that devices and structures not described in detail are understood to be implemented in a manner common in the art; those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or modify equivalent embodiments to equivalent variations, without departing from the spirit of the invention, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.
Claims (5)
1. A novel repairing method for cracks of a bridge pier submerged under water is characterized by comprising the following steps:
step 1, bridge pier crack treatment: firstly, preliminarily cleaning bridge pier cracks, covering the bridge pier cracks by using a rubber template, and reserving an upper side channel and a lower side channel during covering; sealing the rubber template and the pier surface to be repaired;
step 2, drainage and exhaust treatment: performing drainage treatment on the interior of the pier, and discharging liquid in the pier through a lower side channel under the action of natural gravity and a lower side water pumping pump so as to completely drain accumulated water in cracks of the pier and fill gas in the cracks of the pier; after the drainage is finished, carrying out exhaust treatment, and pumping out gas in the bridge pier through the upper side channel to form a negative pressure environment in the bridge pier cracks;
step 3, filling: connecting the lower side pipeline with a filling machine, wherein due to pressure difference, filling materials can quickly fill cracks of the bridge pier from bottom to top, and when the filling materials overflow from the outlet of the upper side pipeline, the bridge pier cracks are completely filled;
the lower side channel is connected with a three-way pipe, three channels of the three-way pipe are respectively connected to the pier crack lower side channel, the water pump machine and the filling machine, and the state of the three-way pipe is controlled by the opening and closing of a valve; according to the difference of valve switching, the three-way pipe has three states: the first state is that the channel opening at the lower side of the crack of the pier is connected with a water pump, and the tee pipe is in the state in the water drainage process in the step 2; the second state is that the lower side channel is sealed and closed, and the three-way pipe is in the state in the exhaust process of the step 2; the third state is that the channel opening at the lower side of the crack of the pier is connected with a filling machine, and the tee pipe is in the state in the filling process in the step 3;
the upper side channel is connected with a three-way pipe, three pipelines of the three-way pipe are respectively connected with the pier crack upper side channel, the air pump module and the stable gas environment, and the state of the three-way pipe is controlled by the opening and closing of a valve; according to the difference of valve switching, the three-way pipe possesses two states: the first state is that the upper side channel of the crack of the pier is connected with a stable gas environment, and the three-way pipe is in the state in the drainage process of the step 2; the second state is that the upper side channel of the crack of the pier is connected with the air pump module, and the three-way pipe is in the state in the air exhaust process in the step 2 and the filling process in the step 3;
the air-extracting pump module comprises an air-extracting pump and a pressure-resistant container, and the pressure-resistant container is arranged between the air-extracting pump and the bridge pier crack upper side channel; during the filling process, the repair material may overflow and be collected in the pressure vessel, thereby preventing the filler from damaging the pump.
2. The novel repairing method for the bridge pier cracks submerged under water as claimed in claim 1, wherein in the step 1, the bridge pier cracks are primarily cleaned to remove foreign matters at the bridge pier cracks.
3. The method of claim 1, wherein in step 1, for a horizontally oriented crack, two channels are opened on both sides of the crack, wherein a channel inclined upward from the crack is an upper channel, and a channel inclined downward from the crack is a lower channel.
4. The novel repairing method for cracks of a pier submerged under water as claimed in claim 1, wherein the rubber template comprises a stainless steel plate and rubber completely wrapping the stainless steel plate, and the shape of the stainless steel plate is determined according to the shape of the surface of the pier to be repaired; after the rubber template is attached to the surface of a pier, the expansion bolts are used for tightly connecting the stainless steel plate inside the rubber template with the surface of the pier to generate large pressure, and rubber around the stainless steel plate is compressed under the action of the pressure, so that sealing between the interior of a crack of the pier and a peripheral liquid environment is realized.
5. The novel repairing method for cracks of pier submerged under water according to claim 1, wherein the stable gas environment is an external atmosphere or a device capable of stably providing a gas environment during the drainage treatment of step 2.
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| KR20170114786A (en) * | 2016-04-06 | 2017-10-16 | 석민건설(주) | Waterproof sheet of concrete structure for protecting leakage by crack and method of fabrication the sheet and method of crack repairing using the sheet |
| CN107354876A (en) * | 2017-07-25 | 2017-11-17 | 苏交科集团股份有限公司 | Underwater pier column reinforcing steel bar rust removal and concrete surface repair device |
| CN207959302U (en) * | 2018-02-08 | 2018-10-12 | 中交四航工程研究院有限公司 | A kind of underwater wet method prosthetic device of concrete-pile defect |
| CN110821205A (en) * | 2019-11-25 | 2020-02-21 | 王景瑞 | Concrete crack negative pressure repairing construction device and construction method |
| CN212896428U (en) * | 2020-05-20 | 2021-04-06 | 中电建十一局工程有限公司 | Be applied to shallow waters concrete defect prosthetic shield formula caisson under water |
| CN113107018A (en) * | 2021-05-21 | 2021-07-13 | 北京中煤矿山工程有限公司 | Method for treating leakage water of underground structure crack |
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