CN217652735U - Construction branch tunnel structure for passing through multiple diversion tunnels - Google Patents
Construction branch tunnel structure for passing through multiple diversion tunnels Download PDFInfo
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- CN217652735U CN217652735U CN202221453957.8U CN202221453957U CN217652735U CN 217652735 U CN217652735 U CN 217652735U CN 202221453957 U CN202221453957 U CN 202221453957U CN 217652735 U CN217652735 U CN 217652735U
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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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- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The utility model provides a pass through construction branch hole structure of many diversion tunnels, it includes a construction branch hole that is used for many parallel diversion tunnels of construction, the construction branch hole passes many diversion tunnel upper flat sections and sets up perpendicularly with it, the construction branch hole divides two-layer to excavate, first layer construction branch hole section is city gate-opening type, directly passes through many diversion tunnels's last flat section, after the completion of diversion tunnel upper flat section first layer excavation supporting, carry out second floor construction branch hole to construction branch hole and diversion tunnel upper flat section cross section and subtract the end to above the diversion tunnel bottom plate, diversion tunnel upper flat section second layer excavation completion back bottom plate backfill filling sediment, the road surface after filling sediment backfills is unanimous with the road surface elevation after the construction branch hole reduces. This branch tunnel structure utilizes construction branch tunnel to pass through the diversion tunnel and goes up the flat section, increases the working face of diversion tunnel upper flat section, has both guaranteed the excavation of diversion tunnel upper flat section and vertical shaft section and has strutted and the concrete construction progress, has reduced the cross interference of diversion tunnel and water inlet construction working face again.
Description
The technical field is as follows:
the utility model relates to a hydraulic and hydroelectric engineering construction technical field especially relates to the excavation of diversion tunnel, strut, concrete construction technical field.
Background art:
diversion tunnels of large hydropower station projects are generally divided into an inlet gradual change section, an upper flat section, an upper bent section, a vertical shaft (inclined shaft) section, a lower bent section and a lower flat section. The upper horizontal section of the diversion tunnel is influenced by the water inlet side slope excavation support, and the excavation support construction of the upper horizontal section of the diversion tunnel cannot be carried out before the water inlet side slope excavation support is completed, so that the vertical well section of the diversion tunnel cannot be constructed.
At present, generally, go up the horizontal segment construction as construction channel entering diversion tunnel through the water inlet, but have following shortcoming, can't carry out the construction of diversion tunnel upper horizontal segment and shaft section before the water inlet road forms, and the mutual interference ratio is great between upper horizontal segment and shaft section and water inlet in the work progress, and simultaneously, concrete stage water inlet tower upper portion is under construction, and constructor passes to and fro in water inlet tower bottom and has certain safe risk. Therefore, in order to accelerate the progress of the project and reduce the mutual interference, a construction branch hole penetrating through a plurality of diversion tunnels needs to be arranged urgently.
The utility model has the following contents:
aiming at the defects of the prior art, the construction branch tunnel penetrates through the upper flat section of the diversion tunnel, so that the construction period of the diversion tunnel is ensured, and the construction interference with a water inlet is reduced.
In order to solve the above problem, the utility model adopts the following technical scheme:
the utility model provides a pass through construction branch tunnel structure of many diversion tunnels, this construction branch tunnel structure includes a construction branch tunnel that is used for many parallel diversion tunnels of construction, construction branch tunnel passes through many diversion tunnels upper flat section and sets up perpendicularly with it, construction branch tunnel divides two-layer excavation, first layer construction branch tunnel section is the city gate hole type, directly pass through many diversion tunnels last flat section, treat diversion tunnel upper flat section first layer excavation strut accomplish after, carry out second floor construction branch tunnel to construction branch tunnel and diversion tunnel upper flat section cross section and subtract the end to above the diversion tunnel bottom plate, diversion tunnel upper flat section second layer excavation accomplishes the back bottom plate and backfills the bed course, road surface after the bed course is backfilled is unanimous with the road surface elevation that construction branch tunnel reduced the back.
The diversion tunnels are arranged in parallel with four.
The first layer of construction branch holes are of an urban door hole type with the section size width multiplied by the height multiplied by 8m multiplied by 7 m.
And the elevation of the top arch of the construction branch tunnel is consistent with that of the top arch of the upper flat section of the diversion tunnel.
And the construction branch tunnel and the upper flat section cross section of the diversion tunnel are subjected to second-layer construction branch tunnel bottom reduction to an elevation 1.5m above a diversion tunnel bottom plate.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model utilizes the construction branch tunnel to pass through the upper horizontal section of the diversion tunnel, increases the working surface of the upper horizontal section of the diversion tunnel, and the construction of the upper horizontal section of the diversion tunnel and the shaft (inclined shaft) section is not influenced by the construction of a water inlet, therefore, the utility model can efficiently and rapidly complete the construction of excavating and supporting concrete of the upper horizontal section of the diversion tunnel and the shaft (inclined shaft) section, accelerate the construction progress of the upper horizontal section of the diversion tunnel and the shaft (inclined shaft) section, effectively solve the construction resource waste,
2. adopt the utility model discloses can avoid diversion tunnel and the interference between the tower construction of intaking, ensure the safety of site operation personnel, vehicle.
To sum up, adopt the utility model discloses both guaranteed that the excavation of horizontal section and vertical shaft section is strutted and the concrete construction progress on the diversion tunnel, reduced the cross interference of diversion tunnel with water inlet construction working face again, guaranteed the construction progress of water inlet.
Description of the drawings:
FIG. 1 is a plan view of the present invention;
FIG. 2 is a longitudinal section of the present invention;
fig. 3 is the utility model discloses a construction branch tunnel's excavation section view.
Reference numbers in the figures:
1-construction branch tunnel, 2-diversion tunnel, 3-water inlet tower, 4-water inlet, 5-filling slag, 6-first layer construction branch tunnel and 7-second layer construction branch tunnel.
The specific implementation mode is as follows:
the present invention will be further explained with reference to the following embodiments, which are intended to explain the principles of the present invention without limiting the present invention in any way, and the present invention is not beyond the protection scope of the present invention by the same or similar techniques.
Referring to fig. 1-fig. 3, the utility model provides a pass through construction branch hole structure of many diversion tunnels, this construction branch hole structure includes a construction branch hole 1 that is used for many parallel diversion tunnels 2 of construction, construction branch hole 1 passes through many last flat sections of diversion tunnels 2, increase the working face of 2 last flat sections of diversion tunnels, 2 last flat sections of diversion tunnels of this embodiment are provided with four, construction branch hole 1 divides the scheme of two-layer excavation according to the circular hole section that diversion tunnel radius is 6.0m and divides two-layer to carry out, 6 section size in first layer construction branch hole is the city gate type of 8m 7m (wide x height), directly pass through each diversion tunnel last flat section, the crown arch elevation is unanimous with the crown arch elevation of diversion tunnel last flat section. And after the excavation of the first layer of the upper flat section of the diversion tunnel 2 is finished, performing second-layer construction branch hole 7 on the cross section of the upper flat section of the construction branch hole 1 and the diversion tunnel 2 to reduce the height 1.5m above the bottom plate of the diversion tunnel 2. The bottom plate is backfilled with 1.5m high filling slag 6 after the excavation of the upper flat section second layer of the diversion tunnel 2 is completed, the height of the road surface after the filling slag 6 is backfilled is consistent with that of the road surface after the construction branch tunnel 1 is reduced, and the smooth passing of construction vehicles is ensured, so that the excavation supporting and concrete construction of the upper flat section of the diversion tunnel 2 and the vertical shaft section, and the construction of a water inlet 4 between the water inlet tower 3 and the diversion tunnel 2 can be simultaneously carried out. The slope of the construction branch tunnel 1 and the upper flat section of the first diversion tunnel 2 connected with the construction branch tunnel before crossing is i =11.06%, and the construction branch tunnel is suitable for climbing of vehicles.
Claims (5)
1. The utility model provides a pass through construction branch hole structure of many diversion tunnels which characterized by: the construction branch tunnel structure comprises a construction branch tunnel (1) used for constructing a plurality of parallel diversion tunnels (2), wherein the construction branch tunnel (1) passes through upper flat sections of the diversion tunnels (2) and is arranged perpendicular to the upper flat sections, the construction branch tunnel (1) is divided into two layers for excavation, the section of a first layer construction branch tunnel (6) is of a city door opening type and directly passes through the upper flat sections of the diversion tunnels (2), after the excavation of the first layer of the upper flat section of the diversion tunnel (2) is finished, a second layer construction branch tunnel (7) is conducted on the cross section of the upper flat sections of the construction branch tunnel (1) and the diversion tunnel (2) to reduce the bottom of the construction branch tunnel (7) to be higher than the bottom plate of the diversion tunnel (2), the backfill of the bottom plate of the second layer of the upper flat section of the diversion tunnel (2) is finished, and the road surface of the backfill tunnel (5) after the backfill of the construction branch tunnel (1) is lowered is consistent in elevation.
2. The construction branch tunnel structure for penetrating through a plurality of diversion tunnels according to claim 1, which is characterized in that: the diversion tunnels (2) are arranged in parallel.
3. The construction branch tunnel structure for penetrating through a plurality of diversion tunnels according to claim 1, which is characterized in that: the first layer of construction branch holes (6) are of an urban door hole type with the section size width multiplied by the height multiplied by 8m multiplied by 7 m.
4. The construction branch tunnel structure for penetrating through a plurality of diversion tunnels according to claim 1, which is characterized in that: the elevation of the top arch of the construction branch tunnel (1) is consistent with that of the top arch of the upper flat section of the diversion tunnel (2).
5. The construction branch tunnel structure for penetrating through a plurality of diversion tunnels according to claim 1, which is characterized in that: and (3) performing second-layer construction branch hole (7) to reduce the elevation 1.5m above the bottom plate of the diversion tunnel (2) at the upper flat section cross section of the construction branch hole (1) and the diversion tunnel (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221453957.8U CN217652735U (en) | 2022-06-09 | 2022-06-09 | Construction branch tunnel structure for passing through multiple diversion tunnels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221453957.8U CN217652735U (en) | 2022-06-09 | 2022-06-09 | Construction branch tunnel structure for passing through multiple diversion tunnels |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217652735U true CN217652735U (en) | 2022-10-25 |
Family
ID=83684116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221453957.8U Active CN217652735U (en) | 2022-06-09 | 2022-06-09 | Construction branch tunnel structure for passing through multiple diversion tunnels |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217652735U (en) |
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2022
- 2022-06-09 CN CN202221453957.8U patent/CN217652735U/en active Active
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