CN108951552B - Pressureless tunnel overhauling channel with air vents - Google Patents
Pressureless tunnel overhauling channel with air vents Download PDFInfo
- Publication number
- CN108951552B CN108951552B CN201810828259.3A CN201810828259A CN108951552B CN 108951552 B CN108951552 B CN 108951552B CN 201810828259 A CN201810828259 A CN 201810828259A CN 108951552 B CN108951552 B CN 108951552B
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- section
- tunnel
- channel
- pressureless
- ventilation
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
- E02B5/08—Details, e.g. gates, screens
-
- 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
- E02B9/04—Free-flow canals or flumes; Intakes
-
- 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)
- Ventilation (AREA)
Abstract
The invention discloses a pressureless tunnel maintenance channel with a ventilation hole, wherein a maintenance channel section and a ventilation hole section are sequentially arranged at the tail end of a construction branch hole, the ventilation hole section is intersected with the pressureless tunnel section, the maintenance channel section adopts a square bearing structure, the upper part of the square bearing structure is provided with a channel for communicating the construction branch hole with the ventilation hole section, and a ventilation grid reinforcing steel bar net is arranged on the channel. The non-pressure tunnel section comprises a non-standard section and a standard section of the non-pressure tunnel, a straight section with a half rectangular section of the half city gate is adopted at the intersection of the non-standard section of the non-pressure tunnel and the vent section, and the straight section with the half rectangular section of the half city gate is connected with the standard section of the non-pressure tunnel by a half gradual change section. The invention not only meets the requirement of the long-distance pressureless tunnel on entering and overhauling, but also has the ventilation condition of the long-distance pressureless tunnel; the structure is arranged economically and practically, and the safety and the service efficiency of the pressureless tunnel operation are improved.
Description
Technical Field
The invention relates to arrangement and structural forms of a pressureless tunnel overhaul channel, in particular to a pressureless tunnel overhaul channel which is permanently combined with a large-section construction support and has a ventilation effect.
Background
Pressureless tunnels are commonly used in diversion irrigation, town water supply, navigation, wood passing, and diversion type hydraulic and hydroelectric engineering. The pressureless tunnel is generally adopted under the condition of low water head or small water-fall depth. The water level frequently fluctuates during the operation of the pressureless tunnel, and the gas in the tunnel is contracted or expanded along with the water level, so that the safety of the pressureless tunnel structure and the operation requirement of the pressureless tunnel are ensured, and good ventilation conditions are required to be arranged above the water surface of the pressureless tunnel. The flow velocity of the pressureless tunnel water flow is generally smaller, dirt in the tunnel is easy to deposit, and particularly when the water flow containing sediment is conveyed, after the pressureless tunnel deposits, the water conveying section is reduced, and adverse effects are generated on ventilation conditions and operation, so that the problems of ventilation, overhaul and the like are more prominent in the pressureless tunnel with long distance.
Disclosure of Invention
The invention aims to solve the technical problem of providing the pressureless tunnel maintenance channel with the advantages of strong applicability, economical and practical structural arrangement and ventilation.
In order to solve the technical problems, the invention adopts the following technical scheme: the pressureless tunnel overhauling channel with the ventilation holes is characterized in that an overhauling channel section and a ventilation opening section are sequentially arranged at the tail end of a construction branch hole, the ventilation opening section is intersected with the pressureless tunnel section, the overhauling channel section adopts a square bearing structure, a channel is arranged at the upper part of the square bearing structure to enable the construction branch hole to be communicated with the ventilation opening section, and a ventilation grid reinforcing steel bar net is arranged on the channel.
The non-pressure tunnel section comprises a non-standard section and a standard section of the non-pressure tunnel, a straight section with a half rectangular section of the half city gate is adopted at the intersection of the non-standard section of the non-pressure tunnel and the vent section, and the straight section with the half rectangular section of the half city gate is connected with the standard section of the non-pressure tunnel by a half gradual change section.
The straight hole section and the vent section are perpendicularly intersected or the acute angle of intersection is not less than 65 degrees.
The straight hole section bottom plate elevation, the vent section bottom plate elevation and the maintenance channel section bottom plate elevation are stepped and gradually raised.
The section height of the construction branch hole is higher than that of the pressureless tunnel, and a dark beam is arranged at the joint of the straight hole section and the air vent section.
The channel is an arc-shaped cavity, and the periphery of the ventilation grid reinforcing steel bar net is embedded and fixed in the concrete of the channel.
The beneficial effects of the invention are as follows: the requirements of ventilation and hole entry overhauling of the long-distance pressureless tunnel are met; the construction support is combined with the construction support permanently, and the structural arrangement is economical and practical; the safety and the use efficiency of the operation of the pressureless tunnel are improved.
Drawings
FIG. 1 is a schematic plan view of a pressureless tunnel service tunnel of the present invention having a vent;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view B-B of FIG. 1;
FIG. 4 is a cross-sectional view taken along line C-C of FIG. 1;
FIG. 5 is a perspective view of the present invention;
in the figure: 1-non-standard section of pressureless tunnel; 2- -an overhaul channel section; 3- - -a vent segment; 4, constructing a supporting hole; 5-a straight hole section; 6-a pressureless tunnel standard section; 7-a ventilation grid reinforcing mesh; 8-dark deep beam; 9- -vent section floor; 10- -overhaul channel section bottom plate; the direction indicated by the arrow is the water flow direction of the pressureless tunnel; the water level symbol represents the design water level of the pressureless tunnel.
Detailed Description
The invention is described in further detail below with reference to the attached drawings and detailed description:
as shown in fig. 1 to 5, the pressureless tunnel maintenance channel with the ventilation holes is characterized in that a maintenance channel section 2 and a ventilation port section 3 are sequentially arranged at the tail end of a construction branch 4, the ventilation port section 3 is intersected with the pressureless tunnel section, the maintenance channel section 2 adopts a port-shaped bearing structure, a channel is arranged at the upper part of the port-shaped bearing structure to enable the construction branch 4 to be communicated with the ventilation port section 3, and a ventilation grid reinforcing steel bar net 7 is arranged on the channel.
The pressureless tunnel section comprises a pressureless tunnel non-standard section 1 and a pressureless tunnel standard section 6, a straight-hole section 5 with a half-city gate semi-rectangular section is adopted at the intersection of the pressureless tunnel non-standard section 1 and the vent section 3, and the straight-hole section 5 with the half-city gate semi-rectangular section is connected with the pressureless tunnel standard section 6 by adopting a half-side gradual change section.
The straight hole section 5 and the vent section 3 are perpendicularly intersected or the acute angle of intersection is not less than 65 degrees.
The heights of the bottom plate of the straight hole section 5, the bottom plate 9 of the vent section and the bottom plate 10 of the overhaul channel section are gradually increased in a stepped manner.
The section height of the construction branch hole 4 is higher than that of the pressureless tunnel, and a dark beam 8 is arranged at the joint of the straight hole section 5 and the air vent section 3.
The channel is an arc-shaped cavity, and the periphery of the ventilation grid reinforcing steel bar net 7 is embedded and fixed in the concrete of the channel.
According to the invention, the non-standard section of the pressureless tunnel is vertically intersected with the construction branch hole or is obliquely intersected at a large angle, a straight hole section with a half rectangular section of a half urban gate hole is adopted at the intersection, a hole is formed in a side wall according to traffic requirements, and the non-standard section of the pressureless tunnel is connected with the standard section of the pressureless tunnel by adopting a gradual change section of the half square urban gate hole; the overhaul channel section respectively makes structural concrete with a certain thickness on the upper part, the lower part, the left part and the right part of the door according to the arrangement and the stress requirement of the overhaul door to form a square bearing structure; the vent port section is positioned between the tail end of the construction branch hole, the overhaul channel section and the non-standard section of the pressureless tunnel, and the vent port section adopts a well type vent structure with an open top, so that the requirement of filling and exhausting the pressureless tunnel is met, and the overflow of water flow of the pressureless tunnel can be avoided.
The invention meets the requirements of ventilation and hole entry overhaul of the long-distance pressureless tunnel; the construction support is combined with the construction support permanently, and the structural arrangement is economical and practical; the safety and the use efficiency of the operation of the pressureless tunnel are improved.
The following is a detailed description of specific embodiments:
in a large-scale diversion pump station engineering, about 5km is arranged between an upper opening and a lower opening of a water drain hole, and sediment-containing water flow is mainly conveyed in the hole and the water level is changed frequently. The construction branch hole of the drainage tunnel is led to the No. 1 traffic hole of the underground pump station. The joint of the construction branch hole and the drainage hole has similar elevation of the bottom plate and larger section height. The drainage tunnel is provided with the pressureless tunnel overhauling channel structure with the ventilation holes at the tail end of the construction branch tunnel. The intersection of the drainage hole and the vent hole section is a straight hole section of a half rectangular section of the half city gate hole, the acute angle clamped by the straight hole section and the vent hole section is 86.44 degrees, the net size of the section of the straight hole section is 2.8m x3.5m, the lining thickness is 0.4m, the bottom plate height is 825.434m, the water surface height is 827.864m, and the length is 10m. The construction branch hole is a city gate hole section, and the net size of the section is 4.5mx5.07m. The length of the vent port section is 2.5m, and the height of the bottom plate is 825.890m; the length of the overhaul channel section is 2m, and the height of the bottom plate is 826.046m. The net cross-sectional dimension of the vent segment was 2.5mx2.8m. A reinforcing steel bar net phi 8 is arranged in an arched cavity between the overhaul channel section and the construction support hole, the row spacing is 150mm, and the periphery of the arch cavity is embedded in concrete. The combination of the straight hole section and the air vent section of the half rectangular section of the half city gate hole of the drain hole is provided with a dark deep beam with the section of 0.4mx1.0m so as to strengthen the structural bearing capacity of the hole part.
The above-described embodiments are only for illustrating the technical spirit and features of the present invention, and it is intended to enable those skilled in the art to understand the content of the present invention and to implement it accordingly, and the scope of the present invention is not limited to the embodiments, i.e. equivalent changes or modifications to the spirit of the present invention are still within the scope of the present invention.
Claims (3)
1. The pressureless tunnel overhaul channel with the ventilation function is characterized in that an overhaul channel section (2) and an air vent section (3) are sequentially arranged at the tail end of a construction branch hole (4), the air vent section (3) is intersected with the pressureless tunnel section, the overhaul channel section (2) adopts a square bearing structure, the upper part of the square bearing structure is provided with a channel which enables the construction branch hole (4) to be communicated with the air vent section (3), and an air vent grid reinforcing steel bar net (7) is arranged on the channel; the non-pressure tunnel section comprises a non-pressure tunnel non-standard section (1) and a non-pressure tunnel standard section (6), a straight hole section (5) with a half-city gate semi-rectangular section is adopted at the intersection of the non-pressure tunnel non-standard section (1) and the vent section (3), the straight hole section (5) with the half-city gate semi-rectangular section is connected with the non-pressure tunnel standard section (6) by a half-side gradual change section, the acute angle between the straight hole section (5) and the vent section (3) is not smaller than 65 degrees, and the elevation of the bottom plate of the straight hole section (5), the elevation of the bottom plate of the vent section (9) and the elevation of the bottom plate (10) of the overhaul channel section are stepwise and gradually increased.
2. The pressureless tunnel maintenance channel with ventilation port according to claim 1, wherein the section height of the construction branch (4) is higher than that of the pressureless tunnel, and a dark beam (8) is arranged at the joint of the straight hole section (5) and the ventilation port section (3).
3. The pressureless tunnel maintenance channel with ventilation function according to claim 1, characterized in that the channel is an arch-shaped cavity, and the periphery of the ventilation grid reinforcing steel bar net (7) is embedded in the concrete of the channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810828259.3A CN108951552B (en) | 2018-07-25 | 2018-07-25 | Pressureless tunnel overhauling channel with air vents |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810828259.3A CN108951552B (en) | 2018-07-25 | 2018-07-25 | Pressureless tunnel overhauling channel with air vents |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108951552A CN108951552A (en) | 2018-12-07 |
| CN108951552B true CN108951552B (en) | 2023-10-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810828259.3A Active CN108951552B (en) | 2018-07-25 | 2018-07-25 | Pressureless tunnel overhauling channel with air vents |
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| Country | Link |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110185117B (en) * | 2019-05-05 | 2024-03-12 | 上海市城市建设设计研究总院（集团）有限公司 | Main hole and branch hole intersection node of sewage water delivery tunnel adopting inspection vehicle for inspection |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3015151A1 (en) * | 1980-04-19 | 1981-11-05 | Bochumer Eisenhütte Heintzmann GmbH & Co, 4630 Bochum | Mine gallery junction arched support - has branch galleries segment arches fastened to stiffening beam between intersections |
| US6413015B1 (en) * | 2001-01-08 | 2002-07-02 | Keith Poirier | Beaver controlling culvert attachment |
| CN104018474B (en) * | 2014-06-23 | 2016-01-20 | 黄河勘测规划设计有限公司 | The method in a working tunnel backfill reconstruction maintenance hole |
| 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 |
| CN208733572U (en) * | 2018-07-25 | 2019-04-12 | 中国电建集团北京勘测设计研究院有限公司 | A kind of non-pressure tunnel access path with blow vent |
-
2018
- 2018-07-25 CN CN201810828259.3A patent/CN108951552B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3015151A1 (en) * | 1980-04-19 | 1981-11-05 | Bochumer Eisenhütte Heintzmann GmbH & Co, 4630 Bochum | Mine gallery junction arched support - has branch galleries segment arches fastened to stiffening beam between intersections |
| US6413015B1 (en) * | 2001-01-08 | 2002-07-02 | Keith Poirier | Beaver controlling culvert attachment |
| CN104018474B (en) * | 2014-06-23 | 2016-01-20 | 黄河勘测规划设计有限公司 | The method in a working tunnel backfill reconstruction maintenance hole |
| 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 |
| CN208733572U (en) * | 2018-07-25 | 2019-04-12 | 中国电建集团北京勘测设计研究院有限公司 | A kind of non-pressure tunnel access path with blow vent |
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| Publication number | Publication date |
|---|---|
| CN108951552A (en) | 2018-12-07 |
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