CN218439386U - Hydraulic tunnel supporting system - Google Patents
Hydraulic tunnel supporting system Download PDFInfo
- Publication number
- CN218439386U CN218439386U CN202221910135.8U CN202221910135U CN218439386U CN 218439386 U CN218439386 U CN 218439386U CN 202221910135 U CN202221910135 U CN 202221910135U CN 218439386 U CN218439386 U CN 218439386U
- Authority
- CN
- China
- Prior art keywords
- tunnel
- section
- wall
- splicing
- grouting
- 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.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
The utility model discloses a hydraulic tunnel supporting system. The system comprises a tunnel outer wall formed by prefabricated pipe pieces arranged along the tunnel wall, a grouting area formed between the tunnel outer wall and a tunnel excavation bedrock through grouting and solidification, and system anchor rods arranged in each prefabricated pipe piece and anchored in the surrounding bedrock of the tunnel; wherein: the outer wall of the tunnel is formed by splicing each independent prefabricated segment along the circumferential direction of the tunnel to form a circumferential splicing segment and connecting adjacent circumferential splicing segments along the longitudinal direction of the tunnel; each annular splicing segment comprises a positioning section, a standard section, an adjacent section and a compact section. The utility model discloses each section of jurisdiction adopts the batch production customization among the supporting system, does not occupy sharp time and the quality is reliable, adopts high-strength bolt to connect between the section of jurisdiction and forms preliminary bracing system, and the system anchor rod construction has further ensured the stability that the anti-blasting impact damage of section of jurisdiction supporting system, adopts grouting technique between section of jurisdiction and the rock, has in time filled the space between the two, promotes the stability of whole supporting system.
Description
Technical Field
The utility model belongs to the technical field of the engineering construction, especially, belong to tunnel construction technical field among the hydraulic and hydroelectric construction, concretely relates to quick supporting system of continuous unfavorable geological section of hydraulic tunnel (high hard rock).
Background
In the construction of hydropower stations, unfavorable geology of pressure pipelines of the hydropower stations is generally supported and constructed by adopting conventional drilling and blasting, net hanging, I-steel, anchor rods and spraying and protecting flow methods. In the conventional supporting operation, when anchor rod operation and I-steel construction are carried out, personnel and equipment are exposed under an unstably formed surrounding rock body, which is often a main risk factor of casualties and equipment loss caused by tunnel collapse safety accidents, so that the existing construction method cannot meet the requirements of continuously improved quality and construction efficiency due to slow footage and high safety risk.
The existing municipal shield construction process adopts shield, duct piece and consolidation grouting flow method for construction, and has high speed and low safety risk. However, municipal shield construction generally adopts shield tunneling, segments are installed and then are solidified and grouted, the tunnel is required to have a certain length to meet the economic requirement, the hardness of rocks is required to be low, otherwise, the cost is too high, and an inlet and outlet working well is required to be arranged to meet the requirements of an installation and removal station; the hydraulic tunnel is generally selected when site selection is carried out, and factors such as high rock hardness, large burial depth and no too long distance of a bad geological section are considered, so that the possibility of selecting shield tunneling is low, blasting tunneling is generally adopted, and installation of a pressure pipeline in a later period is considered, and therefore, the requirements of hydraulic tunnel construction cannot be met by the existing municipal shield construction system.
Disclosure of Invention
The utility model discloses a hydraulic tunnel supporting system according to prior art's not enough. The utility model aims at providing a construction efficiency is high, the security is better, is applied to unfavorable geology section hydraulic tunnel's quick construction supporting system and construction process thereof.
The utility model discloses a following technical scheme realizes:
the utility model provides a hydraulic tunnel support system which characterized in that: the tunnel is characterized by comprising a tunnel outer wall formed by prefabricated pipe pieces arranged along the tunnel wall, a grouting area formed between the tunnel outer wall and a tunnel excavation bedrock through grouting consolidation, and system anchor rods arranged in each prefabricated pipe piece and anchored in the tunnel peripheral bedrock; wherein: the tunnel outer wall is formed by splicing independent prefabricated pipe pieces along the circumferential direction of the tunnel to form circumferential splicing pipe pieces, and connecting adjacent circumferential splicing pipe pieces along the longitudinal direction of the tunnel.
Each annular splicing segment of the utility model comprises a positioning segment, a standard segment, an adjacent segment and a matching segment; the positioning sections are provided with two pieces which are positioned at the lower parts of two ends of the outer wall of the tunnel and fixedly connected with the bottom of the tunnel, the standard section is provided with a plurality of sections which are respectively upwards spliced along the upper ends of the two positioning sections, and each annular splicing duct piece comprises two adjacent sections of which the tail ends are provided with inclined plane connecting ends and a piece of combining section which is fixedly connected with the two adjacent sections through inclined planes.
At least two groups of connecting bolts used for being fixedly connected with adjacent prefabricated pipe pieces are arranged on four sides of each independent prefabricated pipe piece, and the middle of each prefabricated pipe piece is provided with an installation and anchor rod hole and a grouting hole.
The utility model discloses hydraulic tunnel supporting system is applicable to hydraulic tunnel section and is circular or the sectional tunnel of shape of a hoof.
In the hydraulic tunnel supporting system, each pipe piece is customized in a factory, so that the straight line time is not occupied, and the quality reliability is high; after blasting and deslagging on the tunnel face, duct pieces are installed by using a mechanical arm at the first time, and the duct pieces are connected by adopting a high-strength bolt to form a primary support system, so that a person is not required to work on an exposed unfavorable geological surface, the operation time is short, and the safety risk is low; the stability of the segment supporting system against blasting impact damage is further guaranteed by adopting system anchor rod construction, and the requirements of anchoring points in subsequent concrete construction or pressure steel pipe installation construction are met; a grouting process is adopted between the duct piece and the rock, so that a gap between the duct piece and the rock is filled in time, the stability of the whole supporting system is improved, and the straight line time is not occupied; the required wind, water and electricity are the same as those of a conventional support system, so that the construction period and the cost are not additionally increased; the self stability of the formed support system meets the safety requirement in the construction period; the supporting system is assembled into a whole, the appearance quality is good, and the civilized construction image is greatly improved.
Drawings
FIG. 1 is a schematic view of a horseshoe-shaped supporting section of the hydraulic tunnel of the present invention;
FIG. 2 is a schematic view of the combination of the U-shaped supporting section segments of the hydraulic tunnel of the present invention;
FIG. 3 is a schematic view of the cross section of the hydraulic tunnel circular support of the present invention;
FIG. 4 is a schematic view of the hydraulic tunnel circular support section duct piece combination of the utility model;
FIG. 5 is a schematic view of the combined surface of the supporting segments of the hydraulic tunnel;
fig. 6 is a schematic view of the duct piece connection and fixation of the present invention.
In the figure, 1 is the location festival, 2 is the standard festival, 3 is the adjacent joint, 4 is the joint festival, 5 is the hoop coupling bolt, 6 is longitudinal coupling bolt, 7 is installation and anchor rod hole, 8 is the grout hole, A is the inner boundary of segment structure, B is the outer boundary of segment structure, C is the grout region, D is the excavation boundary, E is the system stock, G is the tunnel bottom.
Detailed Description
The following description is provided for further illustration of the present invention with reference to specific embodiments, which are intended to be further illustrations of the principles of the present invention, without any limitation to the present invention, and the present invention is not limited to the same or similar techniques.
With reference to the accompanying drawings.
The utility model discloses a hydraulic tunnel support system, which comprises a tunnel outer wall formed by prefabricated pipe pieces arranged along the tunnel wall, a grouting area formed between the tunnel outer wall and a tunnel excavation bedrock through grouting and consolidation, and system anchor rods arranged in each prefabricated pipe piece and anchored in the bedrock around the tunnel; wherein: the outer wall of the tunnel is formed by splicing independent prefabricated pipe pieces in the circumferential direction of the tunnel to form circumferential spliced pipe pieces and longitudinally connecting adjacent circumferential spliced pipe pieces in the tunnel.
Each annular splicing duct piece of the utility model comprises a positioning section, a standard section, an adjacent section and a matching section; the positioning sections are provided with two pieces which are positioned at the lower parts of two ends of the outer wall of the tunnel and fixedly connected with the bottom of the tunnel, the standard section is provided with a plurality of sections which are respectively upwards spliced along the upper ends of the two positioning sections, and each annular splicing duct piece comprises two adjacent sections of which the tail ends are provided with inclined plane connecting ends and a piece of combining section which is fixedly connected with the two adjacent sections through inclined planes.
At least two groups of connecting bolts used for being fixedly connected with adjacent prefabricated pipe pieces are arranged on four sides of each independent prefabricated pipe piece, and mounting and anchor rod holes and grouting holes are formed in the middle of each prefabricated pipe piece.
As shown in the figures, fig. 1 is a schematic view of a horseshoe-shaped supporting section of the hydraulic tunnel; FIG. 2 is a schematic view of the combination of the U-shaped supporting section segments of the hydraulic tunnel of the present invention; FIG. 3 is a schematic view of the cross section of the hydraulic tunnel circular support of the present invention; figure 4 is the utility model discloses hydraulic tunnel circular support section of jurisdiction combination schematic diagram.
In the hydraulic tunnel supporting system, the pipe pieces are customized in a factory, so that the straight line time is not occupied, and the quality reliability is high; after blasting and deslagging on the tunnel face, duct pieces are installed by using a mechanical arm at the first time, and the duct pieces are connected by adopting a high-strength bolt to form a primary support system, so that personnel do not need to work on the exposed unfavorable geological surface, the operation time is short, and the safety risk is low; the system anchor rod construction further ensures the stability of the segment support system against blasting impact damage and also meets the anchoring point requirements of subsequent concrete construction or pressure steel pipe installation construction; a grouting process is adopted between the duct piece and the rock, so that a gap between the duct piece and the rock is filled in time, the stability of the whole supporting system is improved, and the straight line time is not occupied; the required wind, water and electricity are the same as those of a conventional support system, so that the construction period and the cost are not additionally increased; the self stability of the formed support system meets the safety requirement in the construction period; because the assembly is integrated, the appearance quality is good, and the civilized construction image is greatly improved.
The construction support method of the support system utilizes the rapid support construction of 'duct piece-anchor rod-grouting' and comprises the following steps:
a: the duct piece is prefabricated in a standardized mode outside a field, concrete meeting standard requirements is adopted and a double-layer reinforcing mesh is arranged for pouring according to needs, so that the duct piece can resist stress and strain formed by rock deformation, and holes for duct piece installation and connection, anchor rod construction and grouting construction are reserved;
b: the mechanical arm is adopted for mounting the duct piece, so that the cost is low and the efficiency is high;
c: the duct piece is divided into a positioning section, a standard section, an adjacent section and a combined section according to the section form and the size of the tunnel, the positioning sections on the left side and the right side of the lower part are preferably installed, the standard sections are installed from bottom to top in a left-right alternating mode, then the adjacent section is installed, and finally the combined section is installed to complete closed loop; the pipe pieces are connected by high-strength bolts, the pipe pieces form a circumferential whole in the circumferential direction, the circumferential pipe piece of each cycle is connected with the pipe piece adjacent to the previous cycle at the same time to form longitudinal connection, and the integrity is enhanced;
d: the anchor rod construction is implemented after the segment installation is finished, the drilling is carried out at the position of the reserved hole, the segment is not damaged, the position is ensured to be neat, and the drilling explosion tunneling of the next cycle can be carried out after the anchor rod is injected;
e: the grouting has the functions of backfill grouting and consolidation grouting, so that the stability of a support system in the construction period can be ensured, and the construction period of later grouting can be saved.
After the annular pipe piece of each cycle is installed and fixed, the annular body of the annular pipe piece is used as a resisting body for restraining the deformation or collapse of the surrounding rock in the first stage, and a constructor protection body is formed at the first time.
After the anchor rod construction is carried out, the anchor rod is used as an anti-collision body for restraining the deformation or collapse of the surrounding rock in the second stage.
After grouting construction is carried out, the grouting consolidation bodies in the grouting area are used as resisting bodies for further restraining deformation or collapse of the surrounding rock after filling gaps between the duct pieces and the surrounding rock in the third stage.
Claims (4)
1. The utility model provides a hydraulic tunnel support system which characterized in that: the tunnel is characterized by comprising a tunnel outer wall formed by prefabricated pipe pieces arranged along the tunnel wall, a grouting area formed between the tunnel outer wall and a tunnel excavation bedrock through grouting consolidation, and system anchor rods arranged in each prefabricated pipe piece and anchored in the tunnel peripheral bedrock; wherein: the tunnel outer wall is formed by splicing independent prefabricated pipe pieces along the circumferential direction of the tunnel to form circumferential splicing pipe pieces, and connecting adjacent circumferential splicing pipe pieces along the longitudinal direction of the tunnel.
2. The hydraulic tunnel support system of claim 1, wherein: each annular splicing segment comprises a positioning section, a standard section, an adjacent section and a matching section; the positioning sections are provided with two pieces which are positioned at the lower parts of two ends of the outer wall of the tunnel and fixedly connected with the bottom of the tunnel, the standard section is provided with a plurality of sections which are respectively upwards spliced along the upper ends of the two positioning sections, and each annular splicing duct piece comprises two adjacent sections of which the tail ends are provided with inclined plane connecting ends and a piece of combining section which is fixedly connected with the two adjacent sections through inclined planes.
3. The hydraulic tunnel support system of claim 2, wherein: at least two groups of connecting bolts used for being fixedly connected with adjacent prefabricated pipe pieces are arranged on four sides of each independent prefabricated pipe piece, and the middle of each prefabricated pipe piece is provided with an installation and anchor rod hole and a grouting hole.
4. The hydraulic tunnel support system of claim 1, 2 or 3, wherein: the hydraulic tunnel section is circular or horseshoe-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221910135.8U CN218439386U (en) | 2022-07-18 | 2022-07-18 | Hydraulic tunnel supporting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221910135.8U CN218439386U (en) | 2022-07-18 | 2022-07-18 | Hydraulic tunnel supporting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218439386U true CN218439386U (en) | 2023-02-03 |
Family
ID=85090389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221910135.8U Active CN218439386U (en) | 2022-07-18 | 2022-07-18 | Hydraulic tunnel supporting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218439386U (en) |
-
2022
- 2022-07-18 CN CN202221910135.8U patent/CN218439386U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107091101B (en) | Superimposed joint structure of middle mine shield junction tunnel in sea area and construction method | |
| CN101349064B (en) | Construction method of hydroelectric power station surge chamber vertical shaft under soft rock geological condition | |
| CN105781573B (en) | The two-tube canopy pipe-following drilling construction method of vcehicular tunnel bilayer sleeve reinforcement is worn under railway | |
| CN110821503B (en) | Construction method for main body of ultra-deep shield section air shaft after tunnel advance | |
| CN111365017B (en) | Construction method of underground intercommunication tunnel | |
| CN109779653B (en) | Construction method for crossing of soft rock large-section tunnel | |
| CN105909268A (en) | Pre-stress combined well/tunnel module structure construction method and module structure | |
| CN105089670A (en) | Construction method for enlarging and excavating subway station on basis of parallel interval shield tunnel | |
| CN207033463U (en) | Mine shield handing-over tunnel folded type joint design in the middle part of marine site | |
| CN108374674B (en) | Six pilot tunnels, 12 step Underground Space Excavation method for protecting support | |
| CN218439386U (en) | Hydraulic tunnel supporting system | |
| CN104389609A (en) | No-blasting mechanical digging method | |
| CN114876469A (en) | High-speed super-large section tunnel excavation construction method | |
| JAEGER | PRESENT TRENDS IN THE DESIGN OF PRESSURE TUNNELS AND SHAFTS FOR UNDERGROUND, HYDRO-ELECTRIC POWER STATIONS. | |
| CN115142854A (en) | Mine method tunnel single-layer lining structure system and construction method | |
| Zhang et al. | Construction applicability of mechanical methods for connecting aisle in the bohai mudstone stratum with high water pressure | |
| CN112922031A (en) | Protective structure and construction method for underground chamber under existing building | |
| CN112647978A (en) | Construction method for leading small pilot tunnel of soft rock large-deformation tunnel | |
| CN205955756U (en) | Load and unload formula magnesium iron tunnel wall board soon | |
| CN112302662A (en) | Construction method of artificial backfill shallow-buried tunnel passing through highway | |
| CN217538715U (en) | A high-order sluicing hole structure for filling drainage of sand bed karst cave that can run off | |
| CN111485906A (en) | Sandwich tunnel structure and construction method thereof | |
| CN213331103U (en) | Soft coal seam advanced grouting and water injection equipment | |
| CN219080388U (en) | Pier circular deep foundation | |
| CN217558352U (en) | Upper-span and lower-penetrating proximity structure tunnel reinforcing structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |