CN112112248A - Method for repairing defect of channel box - Google Patents
Method for repairing defect of channel box Download PDFInfo
- Publication number
- CN112112248A CN112112248A CN202010888172.2A CN202010888172A CN112112248A CN 112112248 A CN112112248 A CN 112112248A CN 202010888172 A CN202010888172 A CN 202010888172A CN 112112248 A CN112112248 A CN 112112248A
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- box body
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- plate box
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- 230000007547 defect Effects 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 38
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 84
- 239000010959 steel Substances 0.000 claims abstract description 84
- 230000008439 repair process Effects 0.000 claims abstract description 42
- 239000011440 grout Substances 0.000 claims abstract description 18
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 16
- 239000004568 cement Substances 0.000 claims description 16
- 238000003466 welding Methods 0.000 claims description 11
- 239000002002 slurry Substances 0.000 claims description 10
- 238000007569 slipcasting Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000005536 corrosion prevention Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 15
- 238000005516 engineering process Methods 0.000 description 12
- 238000005260 corrosion Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 239000003973 paint Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000007849 functional defect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000007847 structural defect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/06—Methods of, or installations for, laying sewer pipes
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/04—Pipes or fittings specially adapted to sewers
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/06—Methods of, or installations for, laying sewer pipes
- E03F2003/065—Refurbishing of sewer pipes, e.g. by coating, lining
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Sewage (AREA)
Abstract
The invention provides a method for repairing defects of a channel box, which belongs to the technical field of drainage channel boxes and comprises the steps of fixedly connecting reinforcing ribs on the inner wall of the channel box; prefabricating a steel plate box body, wherein a plurality of grouting holes are formed in the steel plate box body; installing a steel plate box body in the ditch box, wherein a repair gap is formed between the outer side surface of the steel plate box body and the ditch box; the outer side surface of the steel plate box body is fixedly connected with the reinforcing ribs; injecting concrete grout into the repair gap through the plurality of grouting holes; plugging the grouting holes; and carrying out anticorrosive treatment on the inner wall of the steel plate box body. According to the method for repairing the defects of the ditch box, the steel plate box body is arranged in the ditch box, the reinforcing ribs are arranged between the ditch box and the steel plate box body, and concrete is poured to repair the ditch box and fixedly connect the ditch box and the steel plate box body, so that the ditch box is not required to be dug and repaired on the ground, the repair progress of the ditch box is accelerated, and the potential safety hazard of construction is reduced.
Description
Technical Field
The invention belongs to the technical field of drainage channel boxes, and particularly relates to a method for repairing defects of a channel box.
Background
With the rapid development of urban construction, the construction of drainage pipe network systems is gradually improved, however, due to the various reasons of quality problems, rolling damage of heavy vehicles, over-standard service life, inadequate pipe network operation management and the like during pipeline construction, drainage pipes constructed in early urban construction have damage phenomena of different degrees, and the problems of road surface collapse, difficult sewage transportation and collection and the like caused by unsmooth drainage systems are more and more difficult to ignore. Therefore, the timely organization and investigation and the repair of the pipeline defects are particularly important for guaranteeing the normal operation of the drainage system for the problems of structural and functional defects (such as pipeline fracture, deformation, leakage, collapse, malposition, disjointing, falling of interface materials, hidden connection of branch pipes, penetration of foreign matters, fluctuation and the like) of the drainage pipeline in the central urban area.
Because the urban environment is complex and the buildings are dense, the early-stage construction pipe channel is often positioned at the edge of a river, beside or below the buildings, the defect repair can not be carried out by adopting the conventional excavation process, and the defect repair needs to be carried out from the inside of the pipeline by adopting the non-excavation technology. The main trenchless construction method in the current pipe duct defect repair engineering comprises the following steps: the method comprises the following steps of soil body grouting-foundation reinforcement seepage-proofing treatment technology, crack embedding repair technology, stainless steel double-expansion ring repair technology, stainless steel foaming cylinder repair technology, local on-site curing repair technology, on-site curing lining repair technology, mechanical spiral pipe lining repair technology, short pipe welding lining repair technology, folding pipe traction lining repair technology, cement-based polymer coating repair technology and the like, wherein the repair technologies can achieve good repair effects on applicable pipeline defects. However, for the problem of repairing the defects of large and medium-sized ditches in cities, no suitable trenchless repairing method exists at present.
Due to the reasons that the section size of the large and medium-sized channel box is large, the original structure of the channel box is seriously damaged, the geological condition is complex, the buried depth of the channel box is deep and the like, the conventional excavation repairing method has the problems of low construction progress, low construction safety, no guarantee on construction quality, lack of good operation space in a construction site and the like.
Disclosure of Invention
The invention aims to provide a method for repairing defects of a channel box, which aims to solve the technical problems of slow construction progress and low construction safety of channel box repair in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that: the method for repairing the defects of the trench box comprises the following steps:
the inner wall of the channel box is fixedly connected with a reinforcing rib;
prefabricating a steel plate box body, wherein a plurality of grouting holes are formed in the steel plate box body;
installing the steel plate box body in the ditch box, wherein a repair gap is formed between the outer side surface of the steel plate box body and the ditch box; the outer side surface of the steel plate box body is fixedly connected with the reinforcing ribs;
injecting concrete grout into the repair gap through the plurality of grouting holes;
plugging the grouting hole;
and carrying out anticorrosive treatment on the inner wall of the steel plate box body.
As another embodiment of the present application, the concrete slurry is injected in batches, and the injection holes used in the same batch of the concrete slurry are spaced apart from each other.
As another embodiment of the application, a through hole is further formed in the steel plate box body, and a grouting pipe used for injecting cement into the repair gap is installed on the through hole; and after concrete slurry is injected into the repair gap, cement is injected into the repair gap through the grouting pipe.
As another embodiment of this application, the slip casting pipe stretches into the sealing layer of winding on one section lateral surface of through-hole, follow the slip casting pipe to repair after the clearance pours into cement into, use the stop-grouting plug shutoff the slip casting pipe.
As another embodiment of the application, before the inner wall of the steel plate box body is subjected to anticorrosion treatment, the grouting pipe is detached.
As another embodiment of the present application, the slip casting pipe is cut from the root, the through hole and the slip casting pipe are sealed by welding, and the slip casting pipe is ground.
As another embodiment of the application, the plurality of grouting holes are distributed on the steel plate box body in a quincunx shape.
As another embodiment of the application, the steel plate box body is of a rectangular structure formed by splicing two L-shaped steel plates.
As another embodiment of this application, the rectangle structure is a plurality ofly, and follows the length direction setting of steel sheet box, adjacent two the rectangle structure welded fastening.
As another embodiment of this application, the strengthening rib includes vertical rib and horizontal rib, horizontal rib with steel sheet box fixed connection, vertical rib and ditch incasement wall fixed connection.
The method for repairing the defects of the ditch box has the advantages that: compared with the prior art, the method for repairing the defects of the channel box has the advantages that the steel plate box body is arranged in the channel box in the mode, the length direction of the steel plate box body is the same as that of the channel box, the reinforcing ribs are arranged between the channel box and the steel plate box body, concrete is poured into the repairing gap between the channel box and the steel plate box body through the grouting holes in the steel plate box body, the connection strength between the channel box and the steel plate box body is improved, and finally, the inner wall of the steel plate box body is subjected to anticorrosion treatment after the grouting holes are sealed, so that the repairing of the channel box is completed. Through this kind of mode, install the steel sheet box in the ditch case and set up strengthening rib, the fixed connection that the concrete realization was realized to the restoration of ditch case itself and between ditch case and the steel sheet box, need not subaerial grooving and restoreing for the prosthetic progress of ditch case has reduced the construction potential safety hazard.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a method for repairing a defect in a trench box according to an embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
100. a ditch box; 110. repairing the gap; 200. reinforcing ribs; 210. vertical ribs; 220. transverse ribs; 300. a steel plate box body; 310. grouting holes; 320. a grouting pipe; 330. an L-shaped steel plate.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1, a method for repairing a defect in a trench box according to the present invention will now be described. A method for repairing the defect of a channel box comprises fixedly connecting a reinforcing rib 200 on the inner wall of the channel box 100; prefabricating a steel plate box body 300, wherein a plurality of grouting holes 310 are formed in the steel plate box body 300; installing a steel plate box body 300 in the ditch box 100, wherein the outer side surface of the steel plate box body 300 and the ditch box 100 have a repair gap 110; the outer side surface of the steel plate box body 300 is fixedly connected with the reinforcing ribs 200; injecting concrete grout into the repair gap 110 through the plurality of grout holes 310; plugging the grouting holes 310; the inner wall of the steel plate case 300 is subjected to an anticorrosive treatment.
Compared with the prior art, the method for repairing the defects of the trench box provided by the invention has the advantages that the steel plate box body 300 is arranged in the trench box 100 in such a way, the length direction of the steel plate box body 300 is the same as that of the trench box 100, the reinforcing ribs 200 are arranged between the trench box 100 and the steel plate box body 300, concrete is poured into the repairing gap 110 between the trench box 100 and the steel plate box body 300 through the grouting holes 310 in the steel plate box body 300, the connection strength between the trench box 100 and the steel plate box body 300 is improved, and finally, after the grouting holes 310 are sealed, the inner wall of the steel plate box body 300 is subjected to anticorrosion treatment, so that the repair of the trench box. Through this kind of mode, install steel sheet box 300 in ditch case 100 and set up strengthening rib 200, the concreting realizes the restoration to ditch case 100 itself and the fixed connection between ditch case 100 and the steel sheet box 300, need not subaerial grooving and restores for the prosthetic progress of ditch case 100 has reduced the construction potential safety hazard.
Referring to fig. 1, as an embodiment of the method for repairing a defect in a trench box provided by the present invention, concrete slurry is injected in batches, the grouting holes 310 used for injecting concrete slurry in the same batch are spaced apart from each other, that is, two adjacent grouting holes 310 cannot be used for simultaneously pouring concrete, and the spaced apart grouting holes 310 are used for pouring concrete in the same batch, so as to prevent the concrete slurry from flowing out of the middle hole. And continuous slurry supply is ensured in the grouting process so as to meet the requirement of injection amount.
Referring to fig. 1, as an embodiment of the method for repairing a defect in a trench box according to the present invention, a steel plate box 300 is further provided with a through hole, and a grouting pipe 320 for injecting cement into the repair gap 110 is installed on the through hole; after concrete grout is injected into the repair gap 110, cement is injected into the repair gap 110 through the grouting pipe 320, and concrete blades and cement are sequentially added into the repair gap 110, so that the connection strength and stability of the repair gap 110 are improved. The grouting material adopts water and P.O 42.5.5 ordinary portland cement, and the water cement ratio is 1: 1-0.5:1, and the grouting pressure is controlled to be 0.1-0.3 MPa, so that the quality of the injected cement is ensured.
Referring to fig. 1, as a specific embodiment of the method for repairing a defect in a trench box according to the present invention, a sealing layer is wound on an outer side surface of a section of the grouting pipe 320 extending into the through hole, and after cement is injected into the repair gap 110 from the grouting pipe 320, the grouting pipe 320 is sealed by a grout stopper, so that the sealing property between the outer wall of the grouting pipe 320 and the inner wall of the through hole is improved, and the cement is prevented from flowing back into the steel plate box 300 from the repair gap 110. After cement is injected into the grouting pipe 320, the grouting pipe 320 is sealed by a grout stop plug, and the grout stop plug plays a role in isolation to prevent the cement grout from rising. The sealing layer may be cotton yarn.
Referring to fig. 1, as a specific embodiment of the method for repairing the defect of the trench box provided by the present invention, before performing the anti-corrosion treatment on the inner wall of the steel plate box 300, the grouting pipe 320 is removed, and the grouting pipe 320 is removed from the inner wall of the steel plate box 300, so that the inner wall of the steel plate box 300 is smoother, and the anti-corrosion paint is conveniently sprayed on the inner wall of the steel plate box 300, so that the anti-corrosion effect of the anti-corrosion paint is better.
Referring to fig. 1, as a specific embodiment of the method for repairing a defect in a trench box according to the present invention, the grouting pipe 320 is cut from the root, the through hole and the residual grouting pipe 320 are sealed by welding, the residual grouting pipe 320 is ground, and after the concrete is poured into the repair gap 110 through the grouting hole 310, the grouting pipe 320 is cut along the root of the hole by using a hand grinding wheel and sealed by welding to ensure the sealing performance of the entire steel plate box 300. When welding, the welding process is strictly carried out according to the evaluation of the steel plates, and corresponding inspection is carried out. And grinding by using a grinding wheel after welding. When the grouting pipe 320 is not welded and blocked in time, clay or other materials should be used for blocking the grouting hole 310 in time to prevent the loss of the grout.
Referring to fig. 1, as an embodiment of the method for repairing a defect in a trench box provided by the present invention, a plurality of grouting holes 310 are distributed on a steel plate box 300 in a quincunx shape, that is, the plurality of grouting holes 310 are arranged on the steel plate box 300 in multiple levels, and two adjacent layers of grouting holes 310 are staggered and arranged in a quincunx shape. When concrete is poured, the pouring effect is more uniform through the plurality of quincunx grouting holes 310. Two adjacent grouting holes 310 of each layer are spaced by 2 m.
Referring to fig. 1, as a specific embodiment of the method for repairing a defect of a trench box provided by the present invention, a steel plate box 300 is a rectangular structure formed by splicing two L-shaped steel plates 330, the two L-shaped steel plates 330 are butted to form a rectangular structure, and the butted portion is welded and fixed. The two L-shaped steel plates 330 are prefabricated, pulled into designated positions through a crane and a winch, installed and fixed, and ultrasonic flaw detection is carried out on the welding seam after the two L-shaped steel plates 330 are welded, so that the welding seam is ensured to meet the standard requirement.
Referring to fig. 1, as a specific embodiment of the method for repairing a defect in a trench box according to the present invention, a plurality of rectangular structures are arranged along a length direction of a steel plate box 300, two adjacent rectangular structures are welded and fixed, each two L-shaped steel plates 330 form a rectangular structure, the plurality of rectangular structures are sequentially abutted to form the steel plate box 300 having a certain length, and the two adjacent rectangular structures are fixedly connected by welding.
Referring to fig. 1, as a specific embodiment of the method for repairing a defect of a trench box provided by the present invention, a reinforcing rib 200 includes a vertical rib 210 and a horizontal rib 220, the horizontal rib 220 is fixedly connected with a steel plate box 300, the vertical rib 210 is fixedly connected with an inner wall of the trench box 100, and the horizontal rib 220 and the vertical rib 210 are integrally formed and made of steel bars. The side surfaces of the transverse ribs 220 and the side surfaces of the steel plate box body 300 are welded and fixed, the connecting surface of the transverse ribs and the side surfaces is large, and the stability is high; and the end of the vertical rib 210 far away from the transverse rib 220 is fixedly connected with the inner wall of the channel box 100, so that the steel plate box body 300 is fixedly connected with the channel box 100. The reinforcing ribs 200 are provided in plurality, and each side surface of the steel plate tank body 300 is connected with the inner wall of the corresponding channel box 100 through the plurality of reinforcing ribs 200.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The method for repairing the defects of the ditch box is characterized by comprising the following steps:
the inner wall of the channel box is fixedly connected with a reinforcing rib;
prefabricating a steel plate box body, wherein a plurality of grouting holes are formed in the steel plate box body;
installing the steel plate box body in the ditch box, wherein a repair gap is formed between the outer side surface of the steel plate box body and the ditch box; the outer side surface of the steel plate box body is fixedly connected with the reinforcing ribs;
injecting concrete grout into the repair gap through the plurality of grouting holes;
plugging the grouting hole;
and carrying out anticorrosive treatment on the inner wall of the steel plate box body.
2. The method of repairing a trench box defect of claim 1, wherein the concrete slurry is injected in batches, and the injection holes used for injecting the concrete slurry in the same batch are arranged at intervals.
3. The method for repairing a defect of a trench box according to claim 1, wherein a through hole is further formed in the steel plate box body, and a grouting pipe for injecting cement into the repairing gap is installed on the through hole; and after concrete slurry is injected into the repair gap, cement is injected into the repair gap through the grouting pipe.
4. The method of repairing a defect in a trench box according to claim 3, wherein a sealing layer is wound around an outer surface of a section of the grout pipe extending into the through-hole, and the grout pipe is plugged with a grout stopper after injecting cement into the repair gap from the grout pipe.
5. The method of repairing a tank defect of claim 3, wherein the slip casting pipe is removed before the inner wall of the steel plate tank body is subjected to the corrosion prevention treatment.
6. The method of repairing a tank defect of claim 5, wherein the grout tube is cut from the root, the through-hole and the grout tube are sealed by welding, and the grout tube is ground flat.
7. The method of repairing a defect in a trench box according to claim 1, wherein the plurality of grouting holes are distributed in a quincunx shape on the steel plate box body.
8. The method for repairing a defect of a trench box according to claim 1, wherein the steel plate box body is a rectangular structure formed by splicing two L-shaped steel plates.
9. The method for repairing a defect of a trench box according to claim 8, wherein the rectangular structures are arranged along the length direction of the steel plate box body, and two adjacent rectangular structures are welded and fixed.
10. The method for repairing the defect of the channel box as claimed in claim 1, wherein the reinforcing ribs comprise vertical ribs and transverse ribs, the transverse ribs are fixedly connected with the steel plate box body, and the vertical ribs are fixedly connected with the inner wall of the channel box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010888172.2A CN112112248A (en) | 2020-08-28 | 2020-08-28 | Method for repairing defect of channel box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010888172.2A CN112112248A (en) | 2020-08-28 | 2020-08-28 | Method for repairing defect of channel box |
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| Publication Number | Publication Date |
|---|---|
| CN112112248A true CN112112248A (en) | 2020-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010888172.2A Pending CN112112248A (en) | 2020-08-28 | 2020-08-28 | Method for repairing defect of channel box |
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| CN (1) | CN112112248A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113338417A (en) * | 2021-05-19 | 2021-09-03 | 湖南大兴加固改造工程有限公司 | Pressure grouting process for semi-structural reinforcement of arch culvert of masonry |
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| CN110630848A (en) * | 2019-09-25 | 2019-12-31 | 郑州大学 | Trenchless repairing device and method for flattening deformation of large-diameter HDPE (high-density polyethylene) pipeline |
| CN210153407U (en) * | 2019-04-13 | 2020-03-17 | 山西欧诺迪环保科技有限公司 | Pipeline collapse compound circle inner lining ring |
| CN111536362A (en) * | 2020-04-28 | 2020-08-14 | 江苏绿材谷新材料科技发展有限公司 | Method for grouting and reinforcing fiber grids of large-diameter concrete pipeline lining |
-
2020
- 2020-08-28 CN CN202010888172.2A patent/CN112112248A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101145745B1 (en) * | 2011-05-30 | 2012-05-16 | 주식회사 창진 | Cylindrical pipe and reparing method for inner surface of drainage conduit using the same |
| CN103542226A (en) * | 2012-07-17 | 2014-01-29 | 中国长江三峡集团公司 | Method for repairing large-diameter concrete water supply pipeline |
| CN210153407U (en) * | 2019-04-13 | 2020-03-17 | 山西欧诺迪环保科技有限公司 | Pipeline collapse compound circle inner lining ring |
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| CN110630848A (en) * | 2019-09-25 | 2019-12-31 | 郑州大学 | Trenchless repairing device and method for flattening deformation of large-diameter HDPE (high-density polyethylene) pipeline |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113338417A (en) * | 2021-05-19 | 2021-09-03 | 湖南大兴加固改造工程有限公司 | Pressure grouting process for semi-structural reinforcement of arch culvert of masonry |
| CN113338417B (en) * | 2021-05-19 | 2022-08-30 | 湖南大兴加固改造工程有限公司 | Pressure grouting process for semi-structural reinforcement of arch culvert of masonry |
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