CN110685256A - Structure using hydropower station pressure pipeline construction branch tunnel as maintenance channel and construction method - Google Patents
Structure using hydropower station pressure pipeline construction branch tunnel as maintenance channel and construction method Download PDFInfo
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- CN110685256A CN110685256A CN201911035576.0A CN201911035576A CN110685256A CN 110685256 A CN110685256 A CN 110685256A CN 201911035576 A CN201911035576 A CN 201911035576A CN 110685256 A CN110685256 A CN 110685256A
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- construction
- maintenance
- pressure pipeline
- branch
- overhaul
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B9/00—Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
- E02B9/02—Water-ways
- E02B9/06—Pressure galleries or pressure conduits; Galleries specially adapted to house pressure conduits; Means specially adapted for use therewith, e.g. housings, valves, gates
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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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention discloses a structure using a hydropower station pressure pipeline construction branch hole as an overhaul channel, which comprises a vertical construction branch hole for constructing a plurality of parallel pressure pipelines, wherein a backfill concrete layer is poured around a middle flat section of each pressure pipeline, and the top of each backfill concrete layer forms a vehicle running channel; a plurality of groups of maintenance branch pipes and maintenance galleries are arranged in the backfilled concrete layer, one ends of the maintenance branch pipes are connected with the pressure pipeline, and the other ends of the maintenance branch pipes are provided with sealing doors in the maintenance galleries in an extending mode; the top connector of the access corridor is provided with a movable cover plate which is flush with the surface of the vehicle running channel, the connector extends downwards to form an access step, and the bottom of the access corridor is provided with a drainage ditch communicated with a drainage pipe at the bottom of the construction branch hole. Meanwhile, the invention also discloses a construction method of the structure. The invention not only meets the construction requirement, but also provides good passing conditions for later-stage pressure pipeline maintenance, and can shorten the construction period and save the engineering investment.
Description
Technical Field
The invention relates to the technical field of diversion type power station pressure pipeline maintenance channel engineering, in particular to a structure and a construction method for using a hydropower station pressure pipeline construction branch tunnel as a maintenance channel.
Background
The diversion type hydropower station is widely applied to water conservancy and hydropower engineering, and is generally provided with a plurality of pressure pipelines arranged in parallel. Due to the restrictions of the terrain conditions, these pressure pipes are usually arranged inside the mountain. In order to meet the maintenance requirement of the pressure pipeline in the operation period, a necessary maintenance channel is arranged. The pressure pipeline generally consists of an upper flat section, a middle flat section and a lower flat section, wherein the upper flat section is connected with an upstream vertical shaft or inclined shaft, and the lower flat section is connected with a downstream vertical shaft or inclined shaft. For the upper flat section of the pressure pipeline, a water inlet or a surge shaft can be generally utilized to form an access passage; for the lower flat section, a ball valve or butterfly valve manhole on the upstream side of the unit can be used for forming an inspection channel; for the middle flat section, the construction branch tunnel is mostly reconstructed. If the hydropower station is only provided with one pressure pipeline, when the construction branch tunnel is reconstructed into the maintenance channel of the pressure pipeline in the operation period, the construction is simple and convenient, and the maintenance passing condition is good. However, when a plurality of pressure pipelines are arranged in parallel, due to the blocking effect of the first pressure pipeline, the passing condition of the maintenance of the second and subsequent pressure pipelines is poor, and under the condition, the engineering maintenance is very inconvenient. Therefore, a dedicated service passage is often added, resulting in an increase in construction period and engineering investment.
Disclosure of Invention
The invention provides a structure using a hydropower station pressure pipeline construction branch tunnel as an overhaul channel, and also provides a construction method of the overhaul channel, aiming at solving the problems that the existing overhaul channel is inconvenient to pass or high in engineering cost when a plurality of pressure pipelines are arranged in parallel.
In order to achieve the purpose, the invention can adopt the following technical scheme:
the hydropower station pressure pipeline construction branch hole is used as a structure for overhauling a channel, and comprises construction branch holes for constructing a plurality of parallel pressure pipelines, wherein the middle flat sections of the pressure pipelines penetrate through and are vertical to the construction branch holes; a plurality of groups of maintenance branch pipes and maintenance galleries are arranged in the backfill concrete layer, one end of each maintenance branch pipe is connected with a corresponding pressure pipeline, and the other end of each maintenance branch pipe is provided with a sealing door in the corresponding maintenance gallery in an extending manner; the top of each access corridor all set up with the connector that the passageway of going to the bus is linked together, connector department is provided with the removable cover with the passageway surface parallel and level that goes to the bus, and connector department downwardly extending is provided with the maintenance step ladder that is located the access corridor, and the access corridor bottom is provided with the escape canal that is linked together with construction branch hole bottom drain pipe.
The top of the service gallery is flush with the vehicle passage.
The top of the access corridor is horizontally arranged or obliquely arranged.
The construction method of the structure using the hydropower station pressure pipeline construction branch tunnel as the overhaul channel comprises the following steps:
firstly, excavating a construction branch tunnel and paving a bottom drain pipe;
secondly, excavating and laying a pressure pipeline, and welding a maintenance branch pipe on the pressure pipeline;
thirdly, binding steel bars of the overhaul gallery, laying a template, and pouring a backfilled concrete layer;
and fourthly, installing a movable cover plate of the overhaul gallery, an overhaul step ladder and a sealing door of the overhaul branch pipe to finish construction.
The hydropower station pressure pipeline construction branch hole is used as a structure of an overhaul channel, the structure is ingenious, the construction is convenient, a backfill concrete layer provided with the overhaul branch pipe and the overhaul gallery is poured in the construction branch hole, so that a vehicle passage convenient for overhauling a travelling crane is formed at the top of the construction branch hole, and the vehicle passage can be communicated with each pressure pipeline through the overhaul gallery to facilitate later maintenance. The invention can ensure that the construction branch tunnel can be smoothly transferred to the pressure pipeline overhauling channel in the operation period after the construction is finished, not only meets the construction requirement, but also provides good passing conditions for later-period pressure pipeline overhauling, and has important significance for ensuring the normal operation of a hydropower station, shortening the construction period, saving the engineering investment and the like.
Drawings
FIG. 1 is a schematic plan view of the construction of a branch tunnel (access passage) according to the present invention.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
Fig. 3 is a view from B-B of fig. 1.
Detailed Description
As shown in figures 1-3, the structure of the hydropower station pressure pipeline construction branch tunnel used as an overhaul channel comprises a construction branch tunnel 2 used for constructing a plurality of parallel pressure pipelines 1, wherein the middle flat section of each pressure pipeline 1 penetrates through the construction branch tunnel 2 and is vertical to the construction branch tunnel 2, a backfill concrete layer 3 positioned in the construction branch tunnel 2 is poured around each pressure pipeline 1, and a space above the top of the backfill concrete layer 3 forms a vehicle passage 4 with a slope at an inlet and convenient for overhaul. The structural section of the construction branch hole 2 meets the construction requirement of the pressure pipeline 1; for the part of the construction branch tunnel 2 bottom poured with the backfilled concrete layer 3, in order to meet the vehicle passing requirements, the inlet part of the backfilled concrete layer 3 adopts a slope suitable for vehicle climbing, correspondingly, the top of the construction branch tunnel 2 above the inlet part is also properly heightened.
A plurality of groups (3 groups in figures 1 and 2) of maintenance branch pipes 5 and maintenance galleries 6 are arranged in the backfilled concrete layer 3, one end of each maintenance branch pipe 5 is connected with the corresponding pressure pipeline 1, and the other end of each maintenance branch pipe 5 is provided with a sealing door 7 positioned in the corresponding maintenance gallery 6 in an extending manner; the top of each maintenance corridor 6 all sets up the connector that is linked together with the passageway 4 that traveles, and connector department installs the removable cover 8 with 4 surperficial parallel and level of passageway that traveles, and connector department downwardly extending is provided with the maintenance step 9 that is located maintenance corridor 6, and maintenance corridor 6 bottom is provided with the escape canal 11 that is linked together with construction branch hole 2 bottom drain pipe 10. For the convenience of construction, the top of the access corridor 6 is flush with the vehicle running channel 4 to form a part of the vehicle running channel 4, and the top of the access corridor 6 is horizontally arranged or obliquely arranged according to different specific arrangement positions. As shown in fig. 2, for the three access galleries 6 arranged from left to right, the leftmost access gallery 6 is located in the slope section part of the backfilled concrete layer 3, so the top is arranged in an inclined manner at an equal angle to the slope; and the tops of the other two access galleries 6 are all arranged horizontally. The arrangement of the gaps of the backfilling concrete layer 3 can be properly adjusted according to the arrangement of the pressure pipeline 1 and the overhaul gallery 6.
The construction steps of the structure using the hydropower station pressure pipeline construction branch tunnel as the overhaul channel are as follows:
firstly, excavating a construction branch tunnel 2, and paving a bottom drain pipe 10 on the construction branch tunnel;
secondly, excavating and laying the pressure pipeline 1, and welding a maintenance branch pipe 5 on the pressure pipeline 1;
thirdly, binding steel bars of the overhaul gallery 6, laying a template, and pouring a backfilled concrete layer 3;
and fourthly, installing a movable cover plate 8 of the maintenance corridor 6, an maintenance step ladder 9 and a sealing door 7 of the maintenance branch pipe 5 to finish construction.
When the overhaul operation is carried out, an overhaul worker, tools and small equipment required by the overhaul can take an overhaul vehicle to enter a vehicle running channel 4 formed by the backfilled concrete layer 3 from the opening of the construction branch hole 2 until the overhaul vehicle reaches a movable cover plate 8 of an overhaul gallery 6 corresponding to the pressure pipeline 1 to be overhauled; and a movable cover plate 8 at the top of the overhaul gallery 6 is opened, the overhaul personnel carry tools or small equipment required for overhaul to enter the overhaul gallery 6 through an overhaul step 9, a sealing door 7 of the overhaul branch pipe 5 is opened, and overhaul operation is carried out.
It should be noted that the construction branch tunnel 2, the traffic passage 4 and the access corridor 6 belong to the underground limited space, and ventilation and gas access detection are performed before entering. Only after the gas is qualified through admission detection, the personnel are allowed to enter; during the maintenance operation, the gas is monitored and detected, and the safety of the maintenance operation is ensured.
Claims (4)
1. The utility model provides a structure that power station pipeline under pressure construction branch hole was used as access way, includes the construction branch hole that is used for many parallel pipeline under pressure of construction, the well flat section of pipeline under pressure all passes the construction branch hole is mutually perpendicular with it, its characterized in that: a backfill concrete layer positioned in the construction branch hole is poured around the pressure pipeline, and the top of the backfill concrete layer forms a driving channel with a slope at an inlet and convenient for repairing a driving; a plurality of groups of maintenance branch pipes and maintenance galleries are arranged in the backfill concrete layer, one end of each maintenance branch pipe is connected with a corresponding pressure pipeline, and the other end of each maintenance branch pipe is provided with a sealing door in the corresponding maintenance gallery in an extending manner; the top of each access corridor all set up with the connector that the passageway of going to the bus is linked together, connector department is provided with the removable cover with the passageway surface parallel and level that goes to the bus, and connector department downwardly extending is provided with the maintenance step ladder that is located the access corridor, and the access corridor bottom is provided with the escape canal that is linked together with construction branch hole bottom drain pipe.
2. The structure of the hydropower station pressure pipe construction branch tunnel used as a maintenance passage according to claim 1, wherein: the top of the service gallery is flush with the vehicle passage.
3. The structure of the hydropower station pressure pipe construction branch tunnel used as a maintenance passage according to claim 2, wherein: the top of the access corridor is horizontally arranged or obliquely arranged.
4. The construction method of a structure in which a pressure pipe construction branch tunnel of a hydropower station is used as a service passage according to claim 1, characterized in that: the method comprises the following steps:
firstly, excavating a construction branch tunnel and paving a bottom drain pipe;
secondly, excavating and laying a pressure pipeline, and welding a maintenance branch pipe on the pressure pipeline;
thirdly, binding steel bars of the overhaul gallery, laying a template, and pouring a backfilled concrete layer;
and fourthly, installing a movable cover plate of the overhaul gallery, an overhaul step ladder and a sealing door of the overhaul branch pipe to finish construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911035576.0A CN110685256B (en) | 2019-10-29 | 2019-10-29 | Structure using hydropower station pressure pipeline construction branch tunnel as maintenance channel and construction method |
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| CN201911035576.0A CN110685256B (en) | 2019-10-29 | 2019-10-29 | Structure using hydropower station pressure pipeline construction branch tunnel as maintenance channel and construction method |
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| CN110685256A true CN110685256A (en) | 2020-01-14 |
| CN110685256B CN110685256B (en) | 2021-06-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111859554A (en) * | 2020-06-12 | 2020-10-30 | 中国电建集团华东勘测设计研究院有限公司 | Construction and analysis method of buried pipeline seam crossing structure model |
| CN117090168A (en) * | 2023-09-05 | 2023-11-21 | 广东省水利电力勘测设计研究院有限公司 | Method and system for collecting external drainage of diversion branch pipe of underground factory building |
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| WO2016019967A1 (en) * | 2014-08-03 | 2016-02-11 | محمد عبد الجواد حسن حسن، | V-shaped tunnel for generating electricity with water (closed loop and semi-closed loop) |
| CN205035779U (en) * | 2015-09-29 | 2016-02-17 | 浙江省水利水电勘测设计院 | Construction branch tunnel suitable for pressure regulating of water delivery tunnel and maintenance traffic |
| CN206090489U (en) * | 2016-09-21 | 2017-04-12 | 三峡大学 | Transportation of power station pressure steel pipe and mounting adjustment bracket device |
| CN207277294U (en) * | 2017-04-20 | 2018-04-27 | 中国电建集团华东勘测设计研究院有限公司 | A kind of high-head power station penstock overhauls arrangement |
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2019
- 2019-10-29 CN CN201911035576.0A patent/CN110685256B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202064330U (en) * | 2011-04-29 | 2011-12-07 | 中国水电顾问集团华东勘测设计研究院 | Pressure steel pipe inspection access channel structure for high-head hydropower plant |
| WO2016019967A1 (en) * | 2014-08-03 | 2016-02-11 | محمد عبد الجواد حسن حسن، | V-shaped tunnel for generating electricity with water (closed loop and semi-closed loop) |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111859554A (en) * | 2020-06-12 | 2020-10-30 | 中国电建集团华东勘测设计研究院有限公司 | Construction and analysis method of buried pipeline seam crossing structure model |
| CN111859554B (en) * | 2020-06-12 | 2024-01-26 | 中国电建集团华东勘测设计研究院有限公司 | Construction and analysis method of directly buried pipeline seam structure model |
| CN117090168A (en) * | 2023-09-05 | 2023-11-21 | 广东省水利电力勘测设计研究院有限公司 | Method and system for collecting external drainage of diversion branch pipe of underground factory building |
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| CN110685256B (en) | 2021-06-04 |
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