CN211285527U - Combined water blocking structure of embedded pressure steel pipe - Google Patents
Combined water blocking structure of embedded pressure steel pipe Download PDFInfo
- Publication number
- CN211285527U CN211285527U CN201922072549.2U CN201922072549U CN211285527U CN 211285527 U CN211285527 U CN 211285527U CN 201922072549 U CN201922072549 U CN 201922072549U CN 211285527 U CN211285527 U CN 211285527U
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- Prior art keywords
- steel pipe
- pressure steel
- water
- reinforced concrete
- grouting
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 52
- 239000010959 steel Substances 0.000 title claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 230000000903 blocking effect Effects 0.000 title description 5
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 25
- 239000011435 rock Substances 0.000 claims abstract description 20
- 239000004567 concrete Substances 0.000 claims abstract description 17
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 12
- 229910052802 copper Inorganic materials 0.000 claims abstract description 6
- 239000010949 copper Substances 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 7
- 239000011440 grout Substances 0.000 description 4
- 238000005457 optimization Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000011378 shotcrete Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009916 joint effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Lining And Supports For Tunnels (AREA)
Abstract
The utility model discloses a combined water-blocking structure of an embedded pressure steel pipe, which comprises a pressure steel pipe (2); the first section of the pressure steel pipe is inserted into the reinforced concrete tunnel (1), and a group of water-blocking rings (3) are arranged on the first section of the pressure steel pipe inserted into the reinforced concrete tunnel; the rest sections of the pressure steel pipe are provided with a group of stiffening rings (4); the periphery of the rest section of the pressure steel pipe is provided with backfilling concrete (5); a permanent deformation joint (9) is arranged at the joint of the backfilled concrete and the reinforced concrete tunnel, and a copper sheet water stop ring (10) is arranged in the permanent deformation joint; the reinforced concrete tunnel and the backfilling concrete are positioned in a rock body (6), and an anti-seepage curtain grouting (7) and an oblique reinforcing grouting (8) are arranged in the rock body. The utility model discloses a structure can prevent inside and outside water intrusion pressure steel pipe around betterly, reduces outer water pressure, ensures its safe operation, can make operation process simple and convenient again, reduces the running cost, and the effect that blocks water is showing to reach economic rationality's purpose.
Description
Technical Field
The utility model relates to a joint structure of blocking water of formula penstock buries belongs to hydraulic and hydroelectric engineering metallic structure technical field.
Background
Pressure steel pipes are mostly used as pipelines for conveying water from reservoirs, foreponds or surge chambers to power plant room turbines. The penstock is typically buried in the rock mass and concrete is filled between the penstock and the rock mass. Generally, the front end of the pressure steel pipe is connected with a reinforced concrete tunnel. The possibility of internal water seepage exists at the joint of the pressure steel pipe and the reinforced concrete tunnel; the incompleteness of rock mass around the pressure steel pipe is usually treated by anti-seepage curtain grouting, but a seepage channel of a reservoir can be formed. According to the standard requirement, the hole is not generally allowed to be opened on the pressure steel pipe for various grouting, the annular consolidation grouting in the hole is completed before the steel pipe is installed, but at the moment, the uncovered heavy grouting can be realized only by adopting smaller grouting pressure under the condition that a sprayed concrete layer is closed, the compactness and the seepage-proofing performance of the sprayed concrete layer are not as good as those of cast-in-place lining concrete, and the orifice section is just a weak link area affected by excavation blasting, so that the condition of slurry leakage or poor grouting effect exists, and the upstream and the downstream of the curtain can be communicated to form a water seepage channel, so that the downstream seepage pressure of the curtain is higher.
Practice shows that the embedded pressure steel pipe water-blocking structure in the prior art is characterized in that a water-blocking ring is arranged at the starting end of a steel pipe and anti-seepage curtain grouting is carried out in surrounding rock masses, the arrangement form of the water-blocking structure is often single, systematic joint action is not carried out, and defects of different degrees exist, so that potential safety hazards caused by instability due to overlarge external water pressure or phenomena such as water seepage of a side wall at the upstream of a workshop occur occasionally during overhauling of the pressure steel pipe, the performance of engineering benefits is influenced, and the embedded pressure steel pipe water-blocking structure is a problem worthy of deep research.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a joint water-blocking structure of formula of burying penstock makes it both can prevent better that inside and outside water from invading penstock around, reduces outer water pressure, ensures penstock safe operation, can conveniently operate again, reduces the running cost to reach the purpose of economic reasonable operation, and solve the not enough that prior art exists.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model relates to a combined water-blocking structure of an embedded pressure steel pipe, which comprises a pressure steel pipe; the first section of the pressure steel pipe is inserted into the reinforced concrete tunnel, and a group of water-blocking rings are arranged on the first section of the pressure steel pipe inserted into the reinforced concrete tunnel; the rest sections of the pressure steel pipe are provided with a group of stiffening rings; the periphery of the rest section of the pressure steel pipe is provided with backfilled concrete; a permanent deformation joint is arranged at the joint of the backfilled concrete and the reinforced concrete tunnel, and a copper sheet water stop ring is arranged in the permanent deformation joint; the reinforced concrete tunnel and the backfilling concrete are positioned in a rock body, and seepage-proof curtain grouting and oblique reinforcing grouting are arranged in the rock body.
In the combined waterproof structure, the anti-seepage curtain grouting is positioned between the two waterproof rings and is perpendicular to the pressure steel pipe.
In the above-mentioned combined water-blocking structure, the oblique reinforcing grouting is a conical surface structure, and the small diameter end of the conical surface faces the upstream surface.
In the combined water-blocking structure, the oblique reinforcing grouting and the seepage-proofing curtain grouting are intersected in the rock body.
Since the technical scheme is used, the utility model discloses compare with prior art, the utility model discloses a combine into a whole water-blocking structure with penstock, reinforced concrete tunnel, prevention of seepage curtain grout three organically, rethread configuration optimization and process adjustment implement the completion. The structure can better prevent the inside and outside water from invading around the pressure steel pipe, reduce the outside water pressure, ensure the safe operation of the pressure steel pipe, has simple and convenient operation process, reduces the operation cost, has obvious water blocking effect, thereby achieving the purpose of economic rationality and being widely popularized and applied in the technical field of hydraulic and hydroelectric engineering.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The labels in the figures are: 1-reinforced concrete tunnel, 2-pressure steel pipe, 3-water-blocking ring, 4-stiffening ring, 5-backfilled concrete, 6-rock mass, 7-seepage-proofing curtain grouting, 8-oblique reinforcement grouting, 9-permanent deformation joint and 10-copper sheet water-stopping.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The utility model relates to a combined water-blocking structure of an embedded pressure steel pipe, as shown in figure 1, comprising a pressure steel pipe 2; the first section of the pressure steel pipe 2 is inserted into the reinforced concrete tunnel 1, and the first section of the pressure steel pipe 2 inserted into the reinforced concrete tunnel 1 is provided with a group of water-blocking rings 3; the rest sections of the pressure steel pipe 2 are provided with a group of stiffening rings 4; the periphery of the rest section of the pressure steel pipe 2 is provided with backfilled concrete 5; a permanent deformation joint 9 is arranged at the joint of the backfilling concrete 5 and the reinforced concrete tunnel 1, and a copper sheet water stop ring 10 is arranged in the permanent deformation joint 9; the reinforced concrete tunnel 1 and the backfilling concrete 5 are positioned in a rock body 6, and an anti-seepage curtain grouting 7 and an oblique reinforcing grouting 8 are arranged in the rock body 6. The impervious curtain grouting 7 is positioned between the two water-blocking rings 3 and is arranged perpendicular to the penstock 2. The oblique reinforcing grouting 8 is a conical surface structure, and the small diameter end of the conical surface faces the upstream surface. The oblique reinforcing grout 8 and the impervious curtain grout 7 are crossed in the rock body 6.
Examples
The following is a combined water-blocking structure of a buried pressure steel pipe of a diversion power generation system of north-disk Jiangtong-Dongqing hydropower station in Guizhou, and specific construction is shown in FIG. 1, in the embodiment, firstly, structural optimization is performed on the pressure steel pipe 2, and specifically, a group of water-blocking rings 3 are welded at the water inlet end of the pressure steel pipe 2. The water seepage in the reinforced concrete tunnel 1 is blocked by the water-blocking ring 3, or the water seepage path is prolonged, so that the external water pressure of the pressure steel pipe 2 is reduced. The rest part of the pressure steel pipe 2 behind the water-blocking ring 3 is welded with a group of stiffening rings 4 which are arranged at equal intervals to strengthen the compressive strength of the pressure steel pipe 2. And secondly, a permanent deformation joint 9 and a copper sheet water stop 10 are arranged at the boundary of the reinforced concrete tunnel 1 and the backfilling concrete 5 of the pressure steel pipe 2 to prevent the internal water from leaking outwards. In addition, the oblique reinforcing grouting 8 is additionally arranged on the rock mass 6, the oblique reinforcing grouting 8 and the existing seepage-proof curtain grouting 7 in the rock mass 6 are connected in an intersecting mode to form a combined water-proof structure for blocking the rock mass seepage, and finally the penstock 2, the reinforced concrete tunnel 1 and the seepage-proof curtain grouting 7 are organically combined into an integral water-proof structure.
In the construction of the present example, the following steps are adopted: excavating and supporting a rock mass cavity → grouting an impermeable curtain → installing a pressure steel pipe → backfilling concrete → lining construction of a reinforced concrete tunnel → various conventional grouting construction → oblique reinforcement grouting construction. Wherein: the conventional grouting construction and drainage measures are still carried out according to the original conventional technology.
The utility model discloses unite into a whole structure that blocks water with penstock, reinforced concrete tunnel, prevention of seepage curtain grout three organically, rethread structural optimization design and construction process adjustment implement the completion. The structure can better prevent the inside and outside water from invading around the pressure steel pipe, reduce the outside water pressure, ensure the safe operation of the pressure steel pipe, and also ensure the simple and convenient operation process, reduce the operation cost and remarkable the water-blocking effect, thereby achieving the aim of economic rationality.
Claims (4)
1. A combined water-blocking structure of an embedded pressure steel pipe comprises a pressure steel pipe (2); the method is characterized in that: the first section of the pressure steel pipe (2) is inserted into the reinforced concrete tunnel (1), and the first section of the pressure steel pipe (2) inserted into the reinforced concrete tunnel (1) is provided with a group of water-blocking rings (3); the rest sections of the pressure steel pipe (2) are provided with a group of stiffening rings (4); the periphery of the rest section of the pressure steel pipe (2) is provided with backfilled concrete (5); a permanent deformation joint (9) is arranged at the joint of the backfilling concrete (5) and the reinforced concrete tunnel (1), and a copper sheet water stop ring (10) is arranged in the permanent deformation joint (9); the reinforced concrete tunnel (1) and the backfilling concrete (5) are positioned in the rock mass (6), and seepage-proof curtain grouting (7) and oblique reinforcing grouting (8) are arranged in the rock mass (6).
2. The joint water-blocking structure of the embedded penstock of claim 1, characterized in that: the anti-seepage curtain grouting (7) is positioned between the two water-blocking rings (3) and is vertical to the pressure steel pipe (2).
3. The joint water-blocking structure of the embedded penstock of claim 1, characterized in that: the oblique reinforcing grouting (8) is of a conical surface structure, and the small diameter end of the conical surface faces the upstream surface.
4. The joint water-blocking structure of the embedded penstock of claim 1, characterized in that: the oblique reinforcing grouting (8) and the seepage-proof curtain grouting (7) are intersected in the rock body (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922072549.2U CN211285527U (en) | 2019-11-27 | 2019-11-27 | Combined water blocking structure of embedded pressure steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922072549.2U CN211285527U (en) | 2019-11-27 | 2019-11-27 | Combined water blocking structure of embedded pressure steel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211285527U true CN211285527U (en) | 2020-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922072549.2U Active CN211285527U (en) | 2019-11-27 | 2019-11-27 | Combined water blocking structure of embedded pressure steel pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110863473A (en) * | 2019-11-27 | 2020-03-06 | 中国电建集团贵阳勘测设计研究院有限公司 | Combined water blocking structure of embedded pressure steel pipe |
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2019
- 2019-11-27 CN CN201922072549.2U patent/CN211285527U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110863473A (en) * | 2019-11-27 | 2020-03-06 | 中国电建集团贵阳勘测设计研究院有限公司 | Combined water blocking structure of embedded pressure steel pipe |
| CN110863473B (en) * | 2019-11-27 | 2024-06-25 | 中国电建集团贵阳勘测设计研究院有限公司 | Combined water-blocking structure of buried pressure steel pipe |
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