CN111910697A - Device and method for quickly repairing geomembrane - Google Patents
Device and method for quickly repairing geomembrane Download PDFInfo
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- CN111910697A CN111910697A CN202010673262.XA CN202010673262A CN111910697A CN 111910697 A CN111910697 A CN 111910697A CN 202010673262 A CN202010673262 A CN 202010673262A CN 111910697 A CN111910697 A CN 111910697A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D37/00—Repair of damaged foundations or foundation structures
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
-
- 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
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- 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
-
- 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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
- E02D31/025—Draining membranes, sheets or fabric specially adapted therefor, e.g. with dimples
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2103/00—Civil engineering use
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0045—Composites
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2450/00—Gaskets
- E02D2450/10—Membranes
- E02D2450/105—Membranes impermeable
- E02D2450/106—Membranes impermeable for liquids
Abstract
The invention discloses a device and a method for quickly repairing a geomembrane, wherein the device comprises a first liquid adding container and a second liquid adding container, the first liquid adding container and the second liquid adding container are respectively communicated with a liquid injection pool through a first valve and a second valve through a water guide pipe, a liquid outlet of the liquid injection pool is connected with a valve liquid injection guide pipe, the valve liquid injection guide pipe is respectively connected with a liquid injection soft through pipe and a three-stage nozzle, and a liquid outlet converter is arranged at the joint of the valve liquid injection guide pipe, the liquid injection soft through pipe and the three-stage nozzle. The aim of repairing the damaged geomembrane is achieved by spraying the medicament on a construction site, wherein the medicament is a calcium ion solution and a sodium alginate solution which are mixed according to the dosage ratio, and the medicament is directly sprayed on the damaged part of the geomembrane to form a compact calcium alginate filter membrane. The device has simple structure and strong practicability; the raw materials are wide in source and low in price; the treatment method is smearing or spraying, and the operation is convenient, simple and efficient.
Description
Technical Field
The invention belongs to the technical field of environmental geotechnical engineering, and particularly relates to a device and a method for quickly repairing a geomembrane.
Background
Geomembranes are a new engineering anti-seepage material made of high molecular polymers, have the characteristics of good waterproof performance, thin thickness, high construction speed, obvious cost advantage and the like, and are widely applied to anti-seepage engineering of earth-rock dams, dykes, cofferdams, warehouse basins, reservoirs, channels, refuse landfills and the like.
However, the disadvantages of geomembranes are also apparent, being susceptible to breakage and aging during service. According to statistics, the size of the damage defect of the current geomembrane is 0.5-10 cm2Mainly, wherein the punctures/punctures caused by the underlying objects account for the most part. The defects of the sizes mainly comprise breakage caused by overlarge local stress deformation, such as pulling, bursting, puncture, liquid expansion damage and the like, and breakage of the joint of the geomembrane caused by welding or cementing quality, local damage with different degrees and even damage to form macroscopic defects, so that the geomembrane loses the complete anti-seepage function. Although the geomembrane has obvious seepage prevention and price advantages, the dam industry still does not adopt the heat tide of geomembrane seepage prevention for decades, particularly, the seepage prevention application of the geomembrane in a newly-built high-earth-rock dam is more if chen in recent years, and the problem of damage of the geomembrane and the problem of repair of the geomembrane are difficult to solve.
The calcium alginate has good plasticity and barrier property, and also has excellent water absorption property, water retention property and swelling property. In addition, the calcium alginate membrane material has better mechanical property, and particularly, the maximum breaking force and the tensile strength of the dried membrane are very high. Under the condition that the geomembrane is damaged in the existing refuse landfill, no engineering example of using calcium alginate for repairing is available, and at present, the engineering is mainly repaired by using an adhesive tape or a geomembrane welding gun, so that the labor cost is high.
Disclosure of Invention
The invention aims to: aiming at the problems of high labor cost and difficulty in repairing damaged geomembrane caused by repairing by an adhesive tape or a geomembrane welding gun in the prior art, the device and the method for quickly repairing the geomembrane are provided.
The technical scheme adopted by the invention is as follows:
the utility model provides a device for restoreing geomembrane fast, includes first liquid feeding container and second liquid feeding container, and first liquid feeding container and second liquid feeding container are respectively through first valve leads to water pipe and second valve leads to water pipe intercommunication and annotates the liquid pond, and the liquid outlet in notes liquid pond is connected with the valve and annotates the liquid pipe, and the valve is annotated the liquid pipe and is connected with respectively and annotates liquid soft siphunculus and tertiary nozzle, and the valve is annotated liquid pipe, is annotated the junction of liquid soft siphunculus and tertiary nozzle and is provided with out the liquid converter.
Furthermore, a pressurizing device is fixedly connected to the top of the liquid injection pool.
Further, be provided with stirring vane in the notes liquid pond.
The method for quickly repairing the geomembrane by adopting the device for quickly repairing the geomembrane comprises the following steps:
s1, adding a calcium ion solution into a first liquid adding container, and adding a sodium alginate solution into a second liquid adding container;
s2, opening a valve of the first valve water pipe and a valve of the second valve water pipe to enable the calcium ion solution and the sodium alginate solution to respectively flow into the liquid injection pool, opening the stirring blade to stir the solutions to form a repair mixed solution, and then closing the valves of the first valve water pipe and the second valve water pipe;
s3, adjusting the pressure of the liquid injection pool through a pressurizing device to enable the repairing mixed liquid to flow out;
for 10cm2At the damaged position, opening a valve of the valve liquid injection guide pipe and inserting a liquid injection soft through pipe at one end into the opening crack, so that the repairing mixed liquid is injected into the opening crack of the geomembrane through the liquid injection soft through pipe for repairing;
for 0.5-10 cm2And (4) utilizing the liquid outlet converter to uniformly spray the three-stage nozzle at the other end on the surface of the damaged part of the geomembrane for repairing.
Furthermore, the concentration of the calcium ion solution is 0.2-0.8mol/L, and the concentration of the sodium alginate solution is 0.5-1.5 wt%.
Further, the concentration of the calcium ion solution is 0.5mol/L, and the concentration of the sodium alginate solution is 1 wt%; compared with other concentration ranges, the formed calcium alginate colloid of the two solutions has better barrier property in the concentration range, wherein the concentration of the calcium ion solution is preferably 0.5mol/L, and the concentration of the sodium alginate solution is 1 wt% with the best effect.
Further, the volume ratio of the calcium ion solution to the sodium alginate solution is 1-3: 1.
Further, the volume ratio of the calcium ion solution to the sodium alginate solution is 2: 1.
Further, calcium ion solution may be calcium chloride solution or the like.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the invention, a calcium ion solution and a sodium alginate solution are mixed to generate a stable calcium alginate colloid, the calcium alginate is a gel substance with certain plasticity and good barrier property, the gel is a special dispersion system, colloid particles are mutually linked under a certain action to form a space network structure, and a structural gap is filled with a dispersion medium system, while a calcium alginate filter membrane is a colorless transparent compact membrane, and has excellent water absorption property, water retention property and swelling property, in addition, the calcium alginate membrane material has good mechanical properties, especially the maximum breaking force and tensile strength of a dried membrane are very high; therefore, the calcium alginate colloid has a low permeability system, is an excellent barrier material, has a good network structure and good air impermeability, and has good barrier performance and excellent repairing effect when being applied to geomembrane repairing after being verified by experiments;
2. according to the invention, the repairing mixed liquid is sprayed or dripped into the damaged part of the geomembrane, so that the damaged part of the mixed liquid is filled through chemical reaction on the surface of the mixed liquid, and finally a compact calcium alginate filter membrane is formed;
3. the raw materials are convenient and quick to obtain, the price is low, and the fertilizer can be used in a large scale; the device has simple structure, is suitable for repairing mixed liquid, is convenient to repair, and has corresponding repairing modes for larger damage and smaller damage;
4. ions generated in the preparation of the solution have no strong corrosivity and toxicity, cannot damage a geomembrane, cannot generate secondary pollution to a soil body, and accords with the response of green rock soil;
5. the method effectively aims at the micro damage which is easy to occur to the current geomembrane, can effectively repair the geomembrane damage, and has the advantages of convenient operation, little influence on the surrounding environment and lower cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a structural view of an apparatus for rapidly repairing a geomembrane according to the present invention;
FIG. 2 is a graph of gas concentration versus time;
the labels in the figure are: 1-a first liquid adding container, 2-a second liquid adding container, 3-a first valve water-through conduit, 4-a second valve water-through conduit, 5-a pressurizing device, 6-a liquid injection pool, 7-a stirring blade, 8-a valve liquid injection conduit, 9-a liquid outlet converter, 10-a liquid injection soft through pipe and 11-a three-level nozzle.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
Example 1
The preferred embodiment of the invention provides a device for quickly repairing a geomembrane, which comprises a first liquid adding container 1 and a second liquid adding container 2, wherein the first liquid adding container 1 and the second liquid adding container 2 are respectively communicated with a liquid injection pool 6 through a first valve and a second valve through a water guide pipe 3 and a water guide pipe 4, a liquid outlet of the liquid injection pool 6 is connected with a valve liquid injection guide pipe 8, the valve liquid injection guide pipe 8 is respectively connected with a liquid injection soft through pipe 10 and a three-stage nozzle 11, a liquid outlet converter 9 is arranged at the joint of the valve liquid injection guide pipe 8, the liquid injection soft through pipe 10 and the three-stage nozzle 11, a pressurizing device 5 is fixedly connected to the top of the liquid injection pool 6, and stirring blades 7 are arranged in the liquid injection pool.
The method for quickly repairing the geomembrane by adopting the device comprises the following steps:
s1, adding a calcium chloride solution with the concentration of 0.5mol/L into a first liquid adding container, and adding a sodium alginate solution with the concentration of 1 wt% into a second liquid adding container;
s2, opening a valve of the first valve water guide pipe and a valve of the second valve water guide pipe, enabling a calcium chloride solution and a sodium alginate solution to sequentially flow into the liquid injection pool according to the volume ratio of 2:1, opening a stirring blade to stir the solutions to form a repair mixed solution, and then closing the valve of the first valve water guide pipe and the valve of the second valve water guide pipe;
s3, adjusting the pressure of the liquid injection pool through a pressurizing device to enable the repairing mixed liquid to flow out;
for 15cm2The damaged department of (3) the valve of liquid pipe is annotated to the valve of opening and insert the soft siphunculus of liquid with one end into the opening crack for in repairing mixed liquid pours into geomembrane opening crack into through annotating liquid soft siphunculus, repair the geomembrane damaged.
Example 2
The preferred embodiment of the invention provides a device for quickly repairing a geomembrane, which comprises a first liquid adding container 1 and a second liquid adding container 2, wherein the first liquid adding container 1 and the second liquid adding container 2 are respectively communicated with a liquid injection pool 6 through a first valve and a second valve through a water guide pipe 3 and a water guide pipe 4, a liquid outlet of the liquid injection pool 6 is connected with a valve liquid injection guide pipe 8, the valve liquid injection guide pipe 8 is respectively connected with a liquid injection soft through pipe 10 and a three-stage nozzle 11, a liquid outlet converter 9 is arranged at the joint of the valve liquid injection guide pipe 8, the liquid injection soft through pipe 10 and the three-stage nozzle 11, a pressurizing device 5 is fixedly connected to the top of the liquid injection pool 6, and stirring blades 7 are arranged in the liquid injection pool.
The method for quickly repairing the geomembrane by adopting the device comprises the following steps:
s1, adding a calcium chloride solution with the concentration of 0.4mol/L into a first liquid adding container, and adding a sodium alginate solution with the concentration of 0.8 wt% into a second liquid adding container;
s2, opening a valve of the first valve water guide pipe and a valve of the second valve water guide pipe, enabling a calcium chloride solution and a sodium alginate solution to sequentially flow into the liquid injection pool according to the volume ratio of 1.5:1, opening a stirring blade to stir the solutions to form a repairing mixed solution, and then closing the valve of the first valve water guide pipe and the valve of the second valve water guide pipe;
s3, adjusting the pressure of the liquid injection pool through a pressurizing device to enable the repairing mixed liquid to flow out;
for 5cm2The damaged part of the geomembrane is repaired by utilizing the liquid outlet converter and uniformly spraying the three-stage nozzle on the surface of the damaged part of the geomembrane.
Example 3
The preferred embodiment of the invention provides a device for quickly repairing a geomembrane, which comprises a first liquid adding container 1 and a second liquid adding container 2, wherein the first liquid adding container 1 and the second liquid adding container 2 are respectively communicated with a liquid injection pool 6 through a first valve and a second valve through a water guide pipe 3 and a water guide pipe 4, a liquid outlet of the liquid injection pool 6 is connected with a valve liquid injection guide pipe 8, the valve liquid injection guide pipe 8 is respectively connected with a liquid injection soft through pipe 10 and a three-stage nozzle 11, a liquid outlet converter 9 is arranged at the joint of the valve liquid injection guide pipe 8, the liquid injection soft through pipe 10 and the three-stage nozzle 11, a pressurizing device 5 is fixedly connected to the top of the liquid injection pool 6, and stirring blades 7 are arranged in the liquid injection pool.
The method for quickly repairing the geomembrane by adopting the device comprises the following steps:
s1, adding a calcium chloride solution with the concentration of 0.6mol/L into a first liquid adding container, and adding a sodium alginate solution with the concentration of 1.2 wt% into a second liquid adding container;
s2, opening a valve of the first valve water guide pipe and a valve of the second valve water guide pipe, enabling a calcium chloride solution and a sodium alginate solution to sequentially flow into the liquid injection pool according to the volume ratio of 2.5:1, opening a stirring blade to stir the solutions to form a repairing mixed solution, and then closing the valve of the first valve water guide pipe and the valve of the second valve water guide pipe;
s3, adjusting the pressure of the liquid injection pool through a pressurizing device to enable the repairing mixed liquid to flow out;
for 25cm2The damaged department of (3) the valve of liquid pipe is annotated to the valve of opening and insert the soft siphunculus of liquid with one end into the opening crack for in repairing mixed liquid pours into geomembrane opening crack into through annotating the soft siphunculus of liquid, repaired the geomembrane damaged.
Examples of the experiments
The gas barrier capability of the healing mixture prepared in example 1 was tested using a gas diffusion test rig and the results are shown in fig. 2. Figure 2 is a graph showing gas concentration versus time with a slope directly related to the barrier properties of the geomembrane, with a higher slope indicating a lower gas tightness and a better barrier capability. In the figure, the slope of the straight line is reduced and the air tightness is enhanced after the geomembrane is repaired, which shows that the calcium alginate has a great positive effect on the repair of the geomembrane.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. The utility model provides a device for restoreing geomembrane fast, its characterized in that, includes first liquid feeding container (1) and second liquid feeding container (2), first liquid feeding container (1) and second liquid feeding container (2) are respectively through first valve logical water pipe (3) and second valve logical water pipe (4) intercommunication notes liquid pond (6), the liquid outlet of annotating liquid pond (6) is connected with valve notes liquid pipe (8), valve notes liquid pipe (8) are connected with respectively and are annotated soft siphunculus (10) and tertiary nozzle (11), just the valve is annotated liquid pipe (8), is annotated the junction of annotating liquid soft siphunculus (10) and tertiary nozzle (11) and is provided with out liquid converter (9).
2. Device for the rapid repair of geomembranes according to claim 1, characterized in that a pressurizing device (5) is fixedly connected to the top of said injection tank (6).
3. Device for the rapid repair of geomembranes according to claim 1, characterized in that stirring blades (7) are provided inside said liquid injection tank (6).
4. Method for the rapid repair of geomembranes using the device for the rapid repair of geomembranes according to any one of claims 1 to 3, characterized in that it comprises the following steps:
s1, adding a calcium ion solution into a first liquid adding container, and adding a sodium alginate solution into a second liquid adding container;
s2, opening a valve of the first valve water pipe and a valve of the second valve water pipe to enable the calcium ion solution and the sodium alginate solution to respectively flow into the liquid injection pool, opening the stirring blade to stir the solutions to form a repair mixed solution, and then closing the valves of the first valve water pipe and the second valve water pipe;
s3, adjusting the pressure of the liquid injection pool through a pressurizing device to enable the repairing mixed liquid to flow out;
for 10cm2At the damaged position, opening a valve of the valve liquid injection guide pipe and inserting a liquid injection soft through pipe at one end into the opening crack, so that the repairing mixed liquid is injected into the opening crack of the geomembrane through the liquid injection soft through pipe for repairing;
for 0.5-10 cm2And (4) utilizing the liquid outlet converter to uniformly spray the three-stage nozzle at the other end on the surface of the damaged part of the geomembrane for repairing.
5. The method as claimed in claim 4, wherein the concentration of the calcium ion solution is 0.2-0.8mol/L and the concentration of the sodium alginate solution is 0.5-1.5 wt%.
6. The method as claimed in claim 5, wherein the concentration of the calcium ion solution is 0.5mol/L and the concentration of the sodium alginate solution is 1 wt%.
7. The method as claimed in claim 5 or 6, wherein the volume ratio of the calcium ion solution to the sodium alginate solution is 1-3: 1.
8. The method as claimed in claim 7, wherein the volume ratio of the calcium ion solution to the sodium alginate solution is 2: 1.
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| CN202010673262.XA CN111910697A (en) | 2020-07-14 | 2020-07-14 | Device and method for quickly repairing geomembrane |
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| CN202010673262.XA CN111910697A (en) | 2020-07-14 | 2020-07-14 | Device and method for quickly repairing geomembrane |
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Citations (5)
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| CN106193128A (en) * | 2016-07-11 | 2016-12-07 | 东南大学 | Intercept repair apparatus and the method thereof of the clay coating cracking of organic pollution volatilization |
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| CN110243691A (en) * | 2019-06-25 | 2019-09-17 | 山东省水利科学研究院 | A kind of test macro and method of antiseepage composite geo-membrane |
| CN110655349A (en) * | 2019-09-04 | 2020-01-07 | 合肥工业大学 | Asphalt pavement pit repairing capsule and preparation and construction method thereof |
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2020
- 2020-07-14 CN CN202010673262.XA patent/CN111910697A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106193128A (en) * | 2016-07-11 | 2016-12-07 | 东南大学 | Intercept repair apparatus and the method thereof of the clay coating cracking of organic pollution volatilization |
| CN108049902A (en) * | 2018-01-26 | 2018-05-18 | 中冶北方（大连）工程技术有限公司 | A kind of grouted anchor bar and application method in auto-mending crack |
| CN110243691A (en) * | 2019-06-25 | 2019-09-17 | 山东省水利科学研究院 | A kind of test macro and method of antiseepage composite geo-membrane |
| CN110655349A (en) * | 2019-09-04 | 2020-01-07 | 合肥工业大学 | Asphalt pavement pit repairing capsule and preparation and construction method thereof |
| CN110984160A (en) * | 2019-11-06 | 2020-04-10 | 中国电建集团昆明勘测设计研究院有限公司 | Underwater repair method for water seepage crack of concrete panel |
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