CN111206957A - Tunnel lining interlayer passive drainage system and construction maintenance method thereof - Google Patents
Tunnel lining interlayer passive drainage system and construction maintenance method thereof Download PDFInfo
- Publication number
- CN111206957A CN111206957A CN202010161916.0A CN202010161916A CN111206957A CN 111206957 A CN111206957 A CN 111206957A CN 202010161916 A CN202010161916 A CN 202010161916A CN 111206957 A CN111206957 A CN 111206957A
- Authority
- CN
- China
- Prior art keywords
- drainage
- joints
- longitudinal
- tunnel
- passive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012423 maintenance Methods 0.000 title claims abstract description 41
- 238000010276 construction Methods 0.000 title claims abstract description 26
- 239000011229 interlayer Substances 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000010410 layer Substances 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 239000007921 spray Substances 0.000 claims description 4
- 238000009415 formwork Methods 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 4
- 238000004140 cleaning Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 238000003908 quality control method Methods 0.000 abstract 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920006351 engineering plastic Polymers 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000004643 material aging Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L41/00—Branching pipes; Joining pipes to walls
- F16L41/02—Branch units, e.g. made in one piece, welded, riveted
- F16L41/03—Branch units, e.g. made in one piece, welded, riveted comprising junction pieces for four or more pipe members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L41/00—Branching pipes; Joining pipes to walls
- F16L41/08—Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of the wall or to the axis of another pipe
- F16L41/10—Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of the wall or to the axis of another pipe the extremity of the pipe being screwed into the wall
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L41/00—Branching pipes; Joining pipes to walls
- F16L41/08—Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of the wall or to the axis of another pipe
- F16L41/16—Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of the wall or to the axis of another pipe the branch pipe comprising fluid cut-off means
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
A tunnel lining interlayer passive drainage system and a construction maintenance method thereof are provided, the tunnel lining interlayer passive drainage system comprises a plurality of longitudinal drainage pipelines arranged between a waterproof layer and a secondary lining and distributed along the circumferential direction of a tunnel and drainage joints arranged at the seams of adjacent mould linings, the invention can quickly drain seepage water, avoids leakage caused by that a secondary lining directly bears water pressure, is convenient to install and fix by arranging the maintenance joint, can be used for cleaning and dredging by penetrating a pipeline dredging device in the later period, ensures that a longitudinal drainage pipeline is straight on one hand, can be used for paving and hanging a waterproof layer on the other hand, reduces the construction cost, therefore, the invention has the advantages of less material consumption, convenient installation, easy quality control, reliable function and easy maintenance.
Description
Technical Field
The invention relates to the field of tunnels and underground engineering, in particular to a tunnel lining interlayer passive drainage system and a construction maintenance method thereof.
Background
The most common diseases of tunnel engineering are water leakage. Although the tunnel adopts a plurality of measures such as prevention, drainage, interception, blocking and the like at present, the problems of water prevention and drainage are still very prominent, and the failure of a waterproof layer and a drainage system is a direct reason. The composite lining structure for mountain tunnels comprises a primary support and a secondary lining, wherein a special waterproof layer is arranged between the primary support and the secondary support, and an annular drainage blind pipe and an arch foot longitudinal drainage pipe are arranged between the waterproof layer and the primary support to drain away seepage blocked by the waterproof layer. If the waterproof layer or the drainage system can effectively play a role, the tunnel cannot leak. The direct cause of tunnel leakage is that the above waterproof layer and drainage system fail during construction and operation and cannot be repaired or remedied after failure. Because the waterproof layer is inevitably out of work due to construction defects, material aging and other operation period factors, how to construct a passive drainage system between tunnel lining layers and provide a maintainable method is very important for thoroughly solving the problem of frequent water leakage of the tunnel.
Disclosure of Invention
The invention provides a tunnel lining interlayer passive drainage system which can passively drain water penetrating through a waterproof layer and avoid leakage on the surface of a lining and is arranged between the waterproof layer and a secondary lining and a construction and maintenance method thereof, aiming at the problem that the interlayer waterproof layer of a mountain tunnel composite lining structure is often ineffective and difficult to repair.
The invention includes several embodiments as follows:
a passive drainage system between tunnel lining layers comprises a plurality of longitudinal drainage pipelines and drainage joints, wherein the longitudinal drainage pipelines are arranged between a waterproof layer and a secondary lining and are distributed along the circumferential direction of a tunnel, the drainage joints are arranged at the ends of the lining, the longitudinal drainage pipelines are used for collecting water leakage between the waterproof layer and the secondary lining, the longitudinal drainage pipelines are distributed along the extending direction of the tunnel, the end part of each longitudinal drainage pipeline is connected with one drainage joint, the drainage joints on the adjacent longitudinal drainage pipelines are communicated through the circumferential drainage pipelines, the tail ends of the circumferential drainage pipelines are communicated with the tunnel drainage system through drainage pipes, maintenance joints which are communicated with the drainage joints and are distributed along the radial direction are arranged on the drainage joints, the maintenance joints penetrate through the secondary lining to the inner side surface of the tunnel, and the maintenance joints.
Adopt above-mentioned scheme, the drainage connects the seam crossing that sets up at the adjacent mould lining in tunnel, pass through the drain pipe through the longitudinal drainage pipe that the drainage connects to set up between waterproof layer and secondary lining and be connected with tunnel drainage system, thereby derive the percolating water between waterproof layer and the secondary lining, in case the waterproof layer takes place the damage like this, can excrete the infiltration fast, avoid secondary lining directly to bear water pressure and take place the seepage, be equipped with the maintenance joint on the drainage connects in addition, the maintenance joint can be used to the later stage and penetrates the pipeline dredge and clean the mediation, thereby conveniently maintain whole drainage system, prevent that drainage system from becoming invalid.
In the embodiment, the longitudinal drainage pipeline has a circular, semicircular or rectangular cross section and an inner diameter of 1-3 cm. The circumferential distance of the longitudinal drainage pipelines is 30-100 cm, the distance is determined according to the size of water outlet on the surface of the primary support, a small value is taken when the water outlet is large, and a large value is taken otherwise.
In this embodiment, the drainage connects for the five-way connecting piece, and the five-way connecting piece material is stainless steel, alloy steel, stereoplasm aluminum product or engineering plastics that the durability is good, intensity is high, the drainage connects including two hoop joints, two longitudinal joints and one maintenance joint that communicate each other, the hoop connects and makes the adjacent vertical drainage pipe intercommunication of hoop with the hoop drainage pipe intercommunication, and the adjacent vertical drainage pipe of axial communicates each other through the longitudinal joint.
In this embodiment, the maintenance joint is provided with an internal thread, the sealing member is a sealing bolt, and the maintenance joint is sealed by the sealing bolt.
In this embodiment, the longitudinal drainage pipeline is a blind pipe or a permeable pipe.
A construction method of a tunnel lining interlayer passive drainage system is characterized in that the tunnel lining interlayer passive drainage system is utilized, a construction rack is fixed in a tunnel, fixing bolts are arranged on the construction rack according to the circumferential distance of longitudinal drainage pipes, the head ends of the fixing bolts are axially limited on the construction rack, the thread ends are screwed into maintenance joints of drainage joints, the drainage joints are tightly pressed on a waterproof layer, high-strength steel wires penetrate into adjacent drainage joints, the high-strength steel wires penetrate into the longitudinal drainage pipes and are connected with the drainage joints, the high-strength steel wires are tensioned by tensioning equipment, the drainage joints, the longitudinal drainage pipes and the high-strength steel wires are tightly attached to the waterproof layer, secondary lining is poured, and after the secondary lining reaches the formwork removal strength, the fixing bolts are loosened, and the high-strength steel wires are pulled out. According to the construction method, the maintenance joint of the drainage joint is used for preliminary positioning and fixing, and then the high-strength steel wire is used for ensuring that the longitudinal drainage pore passage is straight on one hand and can be used for paving and hanging the waterproof layer on the other hand, so that hot-melt gaskets for fixing the waterproof layer can be reduced, and the construction cost is reduced.
In this embodiment, the sealing bolt is screwed into the maintenance joint for sealing after the construction is completed.
A maintenance method of a tunnel lining interlayer passive drainage system is characterized in that a sealing element is screwed out, a pipeline dredging device extends into a maintenance joint, a high-pressure nozzle is adopted to spray high-pressure water or high-pressure air, silt or water scale in a longitudinal drainage pipeline is removed, and the maintenance joint is sealed again after the completion.
In conclusion, the invention can quickly drain seepage water, avoids leakage caused by that the secondary lining directly bears water pressure, is convenient to install and fix due to the arrangement of the maintenance joint, can be used for penetrating a pipeline dredger for cleaning and dredging in the later period, ensures that the longitudinal drainage pipeline is straight on the one hand, and can be used for paving and hanging the waterproof layer on the other hand, thereby reducing the construction cost.
Drawings
FIG. 1 is a schematic structural diagram of a tunnel lining interlayer passive drainage system of the present invention.
FIG. 2 is a schematic view of the structure of the drain fitting of the present invention.
FIG. 3 is a construction state diagram of the present invention.
FIG. 4 is a schematic view of the connection and installation of the fixing bolt and the drainage connector of the present invention.
FIG. 5 is a schematic view showing the installation of the drain joint, the longitudinal drain pipe and the high-strength steel wire according to the present invention.
FIG. 6 is a schematic view of a maintenance joint according to the present invention in a non-maintenance state.
FIG. 7 is a schematic view of a service joint in a service state according to the present invention.
In the figure: 1-longitudinal drainage pipes; 2-a drainage joint; 3-waterproof layer; 4-secondary lining; 5-lining the end; 6-a water drain pipe; 7-a circumferential joint; 8-longitudinal joint; 9-service joint; 10-a construction rack; 11-fixing the bolt; 12-primary support; 13-a blind pipe; 14-high strength steel wire; 15-sealing bolts; 16-scale; 17-a pipeline dredger; 18-high pressure spray head.
Detailed Description
For a better understanding of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings and examples, which are set forth, however, not to be construed as limiting the embodiments of the present invention, but rather as being included in the scope of the appended claims.
Example 1:
referring to fig. 1 and 2, the tunnel lining interlayer passive drainage system comprises a longitudinal drainage pipeline 1 arranged between a waterproof layer 3 and a secondary lining 4 along the longitudinal direction of a tunnel and a drainage joint 2 arranged at a lining end 5, wherein the drainage joint 2 comprises a five-way connecting piece connected by circumferential drainage pipes, the drainage joint 2 comprises two circumferential joints 7, two longitudinal joints 8 and a maintenance joint 9, the circumferential joints 7 of adjacent drainage joints 2 are communicated through circumferential drainage pipes, the longitudinal joints 8 are communicated with the longitudinal drainage pipeline 1, the maintenance joint 9 is sealed through a sealing bolt 15, and the drainage joint 2 is made of stainless steel, alloy steel, aluminum or engineering plastics with high strength and good durability. The lower part of the drainage joint 2 is communicated with a tunnel drainage system through a drain pipe 6. When the waterproof layer 3 between the tunnel lining layers is damaged due to various reasons, water can penetrate through the waterproof layer, passively enters the longitudinal drainage pipeline 1, flows to the drainage joint 2 at the lining end 5 and enters the tunnel drainage system through the drainage pipe 6, and therefore leakage caused by water pressure formed on the secondary lining 4 is avoided.
Example 2:
referring to fig. 3 to 6, a tunnel lining interlayer passive drainage system is constructed by the following method: firstly, a construction bench 10 with enough rigidity and stability is manufactured, fixing bolts 11 are arranged on the construction bench 10 according to a preset distance, the fixing bolts 11 are screwed into the maintenance joints 9 of the drainage joint 2, and therefore the drainage joint 2 is pressed against primary supports 12 on which the waterproof layer 3 is laid. Then, a high-strength steel wire 14 is inserted into the longitudinal joint 8 of the adjacent drainage joint 2, the blind pipe 13 is sleeved outside the adjacent longitudinal joint 8, the high-strength steel wire 14 is tensioned by tensioning equipment, and the drainage joint 2, the blind pipe 13 and the high-strength steel wire 14 are all tightly attached to the waterproof layer 3 and the primary support 12. After the installation is finished, the secondary lining 4 can be poured. After the secondary lining 4 reaches the stripping strength, the fixing bolt 11 is loosened, the high-strength steel wire 14 is drawn out, and the longitudinal drainage pipeline 1 is formed between the waterproof layer 3 and the secondary lining 4. In order to avoid seepage water from flowing out of the maintenance joint 9, the sealing bolt 15 is screwed into the maintenance joint 9 after construction is completed, and sealing is ensured.
Example 3:
referring to fig. 7, a maintenance method of a tunnel lining interlayer passive drainage system is as follows: after the tunnel is operated for a plurality of years, silt or scale 16 can be deposited in the longitudinal drainage pipeline 1, the sealing bolt 15 is screwed out, the pipeline dredging device 17 extends into the maintenance connector 9, the high-pressure spray head 18 is used for spraying high-pressure water flow or air flow to cut, impact and wash the scale 16, and the drainage function of the longitudinal drainage pipeline 1 is recovered. After the maintenance is finished, the sealing bolt 15 is screwed in again, and the normal operation is recovered.
The foregoing embodiments are merely illustrative of the principles of the present invention and its efficacy, and are not to be construed as limiting the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. A passive drainage system between tunnel lining layer which characterized in that: the water drainage system comprises a plurality of longitudinal drainage pipelines and drainage joints, wherein the longitudinal drainage pipelines are arranged between a waterproof layer and a secondary lining and are distributed along the circumferential direction of a tunnel, the drainage joints are arranged at the joints of adjacent mould linings, the longitudinal drainage pipelines are used for collecting water leakage between the waterproof layer and the secondary lining, the longitudinal drainage pipelines are distributed along the extending direction of the tunnel, the end part of each longitudinal drainage pipeline is connected with one drainage joint, the drainage joints on the adjacent longitudinal drainage pipelines are communicated through the circumferential drainage pipelines, the tail ends of the circumferential drainage pipelines are communicated with the tunnel drainage system through drain pipes, maintenance joints which are communicated with the drainage joints and are distributed along the radial direction are arranged on the drainage joints, the maintenance joints penetrate through the secondary lining to the inner side surface of the tunnel, and the.
2. The tunnel lining interlaminar passive drainage system of claim 1, wherein: the drainage connects for the five-way connecting piece, the drainage connects including two ring joints, two longitudinal joints and a maintenance joint that communicate each other, the ring joint makes the adjacent longitudinal drainage pipe intercommunication of ring with the ring drainage pipe intercommunication, and the adjacent longitudinal drainage pipe of axial communicates each other through longitudinal joint.
3. The tunnel lining interlaminar passive drainage system of claim 1, wherein: the maintenance joint is provided with internal threads, the sealing element is a sealing bolt, and the maintenance joint is sealed through the sealing bolt.
4. The tunnel lining interlaminar passive drainage system of claim 1, wherein: the longitudinal drainage pipeline is a blind pipe or a permeable pipe.
5. The tunnel lining interlaminar passive drainage system of claim 1, wherein: the longitudinal drainage pipeline is circular, semicircular or rectangular in cross section, and the inner diameter of the longitudinal drainage pipeline is 1-3 cm.
6. The tunnel lining interlaminar passive drainage system of claim 1, wherein: the circumferential distance of the longitudinal drainage pipelines is 30-100 cm.
7. A method for constructing a tunnel lining interlaminar passive drainage system, which uses the tunnel lining interlaminar passive drainage system of any one of claims 1 to 6, and is characterized in that: firstly, fixing a construction rack in a tunnel, arranging fixing bolts on the construction rack according to the circumferential distance of longitudinal drainage pipelines, axially limiting the head ends of the fixing bolts on the construction rack, screwing thread ends into maintenance joints of drainage joints, pressing the drainage joints on a waterproof layer, then penetrating high-strength steel wires into adjacent drainage joints, penetrating the high-strength steel wires into the longitudinal drainage pipelines, connecting the longitudinal drainage pipelines with the drainage joints, tensioning the high-strength steel wires by using tensioning equipment, tightly attaching the drainage joints, the longitudinal drainage pipelines and the high-strength steel wires to the waterproof layer, pouring a secondary lining, loosening the fixing bolts after the secondary lining reaches the formwork removal strength, and drawing out the high-strength steel wires.
8. The construction method of the tunnel lining interlayer passive drainage system according to claim 7, wherein: and after the construction is finished, the sealing bolt is screwed in to maintain the joint for sealing.
9. A maintenance method of a tunnel lining interlaminar passive drainage system using the tunnel lining interlaminar passive drainage system according to any one of claims 1 to 6, characterized in that: firstly, screwing out the sealing element, extending the pipeline dredging device into the maintenance joint, spraying high-pressure water or high-pressure air by using a high-pressure spray head, removing silt or water scale in the longitudinal drainage pipeline, and sealing the maintenance joint again after the completion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010161916.0A CN111206957A (en) | 2020-03-10 | 2020-03-10 | Tunnel lining interlayer passive drainage system and construction maintenance method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010161916.0A CN111206957A (en) | 2020-03-10 | 2020-03-10 | Tunnel lining interlayer passive drainage system and construction maintenance method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111206957A true CN111206957A (en) | 2020-05-29 |
Family
ID=70787488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010161916.0A Pending CN111206957A (en) | 2020-03-10 | 2020-03-10 | Tunnel lining interlayer passive drainage system and construction maintenance method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111206957A (en) |
-
2020
- 2020-03-10 CN CN202010161916.0A patent/CN111206957A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103726497B (en) | Upper pipe working well reinforcing device | |
| CN112049219A (en) | Construction method of repairing system for leakage water of sewage pipe network | |
| CN212003255U (en) | Passive drainage system between tunnel lining layer | |
| CN111206957A (en) | Tunnel lining interlayer passive drainage system and construction maintenance method thereof | |
| CN203411970U (en) | Flexible vacuum preloading type water discharging pipe | |
| CN114526398A (en) | Construction method for repairing drainage pipeline by newly added lining pipe | |
| CN209688340U (en) | A kind of pipeline rehabilitation apparatus and system | |
| CN212715245U (en) | Drainage pipe with anti-reflux function for building water supply and drainage | |
| CN216867808U (en) | Civil engineering water supply and drainage pipeline connection structure | |
| KR100649139B1 (en) | Jointing one body type for not-digging repair method for pipe sill | |
| CN212617043U (en) | Quick repair lock for pipeline | |
| CN210263294U (en) | Sewer for municipal administration | |
| KR101399523B1 (en) | Installing the device for branch method using fluid shutoff device | |
| CN213508108U (en) | Self-connecting assembled culvert pipe structure | |
| KR100678389B1 (en) | Trenchless whole rehabilitation method of a sewage pipe-line using combination stainless steel sleeve and rigid polyvinyl chloride pipe as repairing device | |
| JP6458101B2 (en) | Water stop plug device | |
| US20120049515A1 (en) | Boltless Pipe Joint Assembly | |
| CN102817472A (en) | Shoring moldboard for preventing edge of pipeline from seeping | |
| CN218116468U (en) | Prevent inflation's slip casting pipeline of solidification | |
| JP6517892B2 (en) | Water plug device | |
| CN114232693B (en) | Waterproof outer wall and construction method | |
| CN215593925U (en) | Drainage blind plate of pumped storage power station | |
| CN216242877U (en) | Self-waterproof three-way joint for tunnel | |
| CN210920433U (en) | Pipeline connecting device for construction | |
| KR102389841B1 (en) | A cleaning system that removes foreign substances and residual water by passing through the water pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |