CN210440045U - Eggshell-shaped grouting tunnel car-avoiding tunnel structure - Google Patents
Eggshell-shaped grouting tunnel car-avoiding tunnel structure Download PDFInfo
- Publication number
- CN210440045U CN210440045U CN201921353136.5U CN201921353136U CN210440045U CN 210440045 U CN210440045 U CN 210440045U CN 201921353136 U CN201921353136 U CN 201921353136U CN 210440045 U CN210440045 U CN 210440045U
- Authority
- CN
- China
- Prior art keywords
- tunnel
- car
- avoiding
- section
- 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
- 238000009412 basement excavation Methods 0.000 claims abstract description 21
- 239000011440 grout Substances 0.000 claims description 8
- 102000002322 Egg Proteins Human genes 0.000 claims description 4
- 108010000912 Egg Proteins Proteins 0.000 claims description 4
- 210000003278 egg shell Anatomy 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 14
- 239000011435 rock Substances 0.000 abstract description 3
- 230000007704 transition Effects 0.000 abstract description 3
- 230000000007 visual effect Effects 0.000 abstract description 3
- 238000005422 blasting Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
The utility model provides an eggshell-shaped grouting tunnel car-avoiding tunnel structure, which comprises a grouting tunnel and a car-avoiding tunnel in the middle section of the grouting tunnel; the top wall of the car-avoiding tunnel is provided with a left arc-shaped section and a right arc-shaped section, wherein one section is in a circular arc shape consistent with the circular arc of the top wall of the grouting tunnel, the other section is in an elliptical arc shape, the height of the midpoint position of the top wall of the two arc-shaped sections is consistent with the height of the midpoint position of the circular arc of the top wall of the grouting tunnel, and the elliptical arc sections of the top wall of the car-avoiding tunnel are in horizontal smooth transition with the circular arc sections of the. The utility model discloses surrounding rock stress deformation self-adaptive capacity is strong, and the structure atress condition is good, can effectual assurance construction safety in excavation construction period, and make full use of headspace compares the effectual volume of excavating that has reduced of rectangle section, has built an open visual space in narrow tunnel space, builds good operation environment for later stage grouting construction.
Description
Technical Field
The utility model relates to an eggshell shape grout tunnel car-avoiding hole structure.
Background
In recent years, with the westernshift of main battlefields in hydropower development, particularly in southwest mountainous areas, the sizes of karst tunnels are rapidly increased due to the restriction of various factors such as karst development, complex topographic and geological conditions and the like. And the drilling and blasting excavation is often limited to a certain extent under the influence of the external built tunnel. The excavation mode of the hydraulic tunnel is gradually developed to the excavation mode of the subway tunnel TBM with complicated urban complicatedness. Because the hydraulic grouting tunnel is generally short in length, a small-sized heading machine is often adopted. The conventional size of the grouting tunnel is about 3 multiplied by 4m, and the working space of the EBZ260 cantilever type heading machine equipment matched with excavation is about 18 multiplied by 3.6 m.
Compared with a drilling and blasting method, the required car-avoiding hole space is also larger due to the larger size structure of the heading machine, and in addition, the car-avoiding hole is generally arranged on one side of the vertical tunnel axis, so that the shape and size of the cross section are not easy to control during excavation. In addition, the width of the car-avoiding tunnel is large so as to ensure that the excavation height of the safe (certain safe width-height ratio) of the tunnel is increased, so that the excavation engineering amount is increased, and the economical efficiency is reduced. The drilling and blasting method is preferentially selected for construction under the condition that the excavation condition of the existing grouting tunnel allows, and the required vehicle-avoiding tunnel is small in size and has no related problems. The existing technical scheme does not have a safe and economic section design mode which is caused by the fact that the excavation size of the car-avoiding tunnel is increased.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an eggshell shape grout tunnel car-keeping away hole structure, this eggshell shape grout tunnel car-keeping away hole structure is through the structure setting of car-keeping away hole roof, has overcome the car-keeping away hole excavation size that current hydraulic grouting tunnel geological conditions and construction environment were complicated to be brought and can not unify the coordination problem in the aspect of security and economic nature.
The utility model discloses a following technical scheme can realize.
The utility model provides an eggshell-shaped grouting tunnel car-avoiding tunnel structure, which comprises a grouting tunnel and a car-avoiding tunnel in the middle section of the grouting tunnel; the top wall of the car-avoiding tunnel is provided with a left arc-shaped section and a right arc-shaped section, wherein one section is in a circular arc shape consistent with the circular arc of the top wall of the grouting tunnel, the other section is in an elliptical arc shape, the height of the midpoint position of the top wall of the two arc-shaped sections is consistent with the height of the midpoint position of the circular arc of the top wall of the grouting tunnel, and the elliptical arc sections of the top wall of the car-avoiding tunnel are in horizontal smooth transition with the circular arc sections of the.
The car-avoiding tunnel is provided with one section on the grouting tunnel every 200 m.
The height of the middle point of the top walls of the two arc-shaped sections of the car-avoiding hole is 4.9 m.
The height of the edge of the top wall of the elliptic arc section of the car-avoiding hole is 2.5 m.
A drainage ditch is dug at the bottom of the inner side wall of the grouting tunnel and extends along the bottom of the side wall of the elliptical arc section of the car-avoiding tunnel.
The bottom plates of the grouting tunnel and the car-avoiding tunnel are inclined from top to bottom to the drainage ditch excavation position.
The cross section specification of escape canal is 0.3m 0.2 m.
The beneficial effects of the utility model reside in that: the surrounding rock stress deformation self-adaptive ability is strong, and the structure atress condition is good, can effectual assurance construction safety in excavation construction period, and make full use of headspace compares the effectual work load that has reduced of rectangular section, has built an open visual space in narrow tunnel space, builds good operational environment for later stage grouting construction.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic view of the internal structure of FIG. 1;
fig. 3 is a schematic cross-sectional structure view of the tunnel portion in fig. 1.
In the figure: 1-first-stage concrete, 2-second-stage reinforced concrete lining, 3-anti-platform anchor rods, 4-drainage ditches, 5-consolidation grouting, 6-backfill grouting, 7-grouting tunnels and 8-vehicle avoidance tunnels.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
The eggshell-shaped grouting tunnel vehicle-avoiding structure shown in fig. 1 to 3 comprises a grouting tunnel 7 and a vehicle-avoiding tunnel 8 in the middle section of the grouting tunnel 7; the top wall of the car-avoiding tunnel 8 is provided with a left arc-shaped section and a right arc-shaped section, wherein one section is in a circular arc shape and is consistent with the circular arc of the top wall of the grouting tunnel 7, the other section is in an arc shape and is an elliptical arc shape, the height of the midpoint position of the top wall of the two arc-shaped sections is consistent with the height of the midpoint position of the circular arc of the top wall of the grouting tunnel 7, and the horizontal smooth transition of the elliptical arc section of the top wall of the car-avoiding tunnel 8 and.
The car-avoiding tunnel 8 is provided with a section on the grouting tunnel 7 every 200 m.
The height of the middle point of the top walls of the two arc-shaped sections of the car-avoiding hole 8 is 4.9 m.
The height of the edge of the top wall of the elliptic arc section of the car-avoiding hole 8 is 2.5 m.
7 inside wall bottom excavates of grout tunnel has escape canal 4, and escape canal 4 extends along the elliptical arc section lateral wall bottom of keeping away car hole 8.
The bottom plates of the grouting tunnel 7 and the car-avoiding tunnel 8 are inclined from top to bottom to the excavation position of the drainage ditch 4.
The cross section specification of the drainage ditch 4 is 0.3m multiplied by 0.2 m.
Specifically, the eggshell-shaped grouting tunnel car-avoiding structure provided by the utility model is provided with one grouting equipment at an interval of about 200m according to the setting requirement of the hydraulic grouting tunnel car-avoiding structure, the grouting equipment is placed in order to solve the problem of grouting construction in the later stage, the car-avoiding tunnel is reconstructed into an equipment tunnel in the later stage, the top height of the car-avoiding tunnel is kept the same as the height of the grouting tunnel by 4.9m, and the position of a side wall is gradually changed into 2.5 m; the bottom plate on one side of the side wall is provided with a drainage ditch of 0.3 multiplied by 0.2m, the section of the car-sheltering hole is provided with a drainage slope of which i is 0.005, no pumping and drainage facility is needed, and water in the hole can flow out of the hole along the drainage ditches on the two sides by itself. The utility model discloses the excavation flow is specifically as follows:
excavating in the first stage:
the second-stage supporting construction step sequence:
from this, the utility model discloses:
(1) the tunnel excavation section obtained by fully combining excavation of the excavator is high in smoothness, the eggshell-shaped vehicle-avoiding tunnel excavation section form is adopted, the surrounding rock stress deformation self-adaptive capacity is high, the eggshell-shaped structure stress condition is good, and the construction safety can be effectively guaranteed in the excavation construction period.
(2) The eggshell-shaped section of the car-avoiding tunnel fully utilizes the top space under the condition of ensuring safety, and compared with the rectangular section, the eggshell-shaped section of the car-avoiding tunnel effectively reduces the engineering quantity, and plays a certain economic effect.
(3) The eggshell-shaped structure creates an open visual space in a narrow tunnel space, and creates a good working environment for later grouting construction.
(4) In order to solve the problems that grouting equipment is placed during later grouting construction, and the equipment hole is reconstructed into an equipment hole in the later period of the car-avoiding hole, the multifunctional function of one hole is achieved.
Claims (7)
1. The utility model provides an eggshell shape grout tunnel car-avoiding hole structure, includes grout tunnel (7) and keeps away car hole (8) in grout tunnel (7) middle section, its characterized in that: the top wall of the car-avoiding hole (8) is provided with a left arc-shaped section and a right arc-shaped section, one section is arc-shaped and is consistent with the arc of the top wall of the grouting tunnel (7), the other section is arc-shaped and is an elliptic arc, the height of the middle point of the top wall of the two arc-shaped sections is consistent with the height of the middle point of the arc of the top wall of the grouting tunnel (7), and the top wall elliptic arc section of the car-avoiding hole (8) is horizontally and smoothly transited with the arc-shaped section of the car-avoiding hole (.
2. The eggshell-shaped grouting tunnel vehicle avoiding tunnel structure of claim 1, which is characterized in that: the car-avoiding tunnel (8) is provided with a section every 200m on the grouting tunnel (7).
3. The eggshell-shaped grouting tunnel vehicle avoiding tunnel structure of claim 1, which is characterized in that: the height of the middle point of the top walls of the two arc-shaped sections of the car-avoiding hole (8) is 4.9 m.
4. The eggshell-shaped grouting tunnel vehicle avoiding tunnel structure of claim 1, which is characterized in that: the height of the edge of the top wall of the elliptic arc section of the car-avoiding hole (8) is 2.5 m.
5. The eggshell-shaped grouting tunnel vehicle avoiding tunnel structure of claim 1, which is characterized in that: grout tunnel (7) inside wall bottom excavation has escape canal (4), and escape canal (4) extend along the oval arc section lateral wall bottom of keeping away car hole (8).
6. The eggshell-shaped grouting tunnel vehicle avoiding tunnel structure of claim 5, wherein: the bottom plates of the grouting tunnel (7) and the car-avoiding tunnel (8) are inclined from top to bottom to the excavation position of the drainage ditch (4).
7. The eggshell-shaped grouting tunnel vehicle avoiding tunnel structure of claim 5, wherein: the cross section specification of the drainage ditch (4) is 0.3m multiplied by 0.2 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921353136.5U CN210440045U (en) | 2019-08-20 | 2019-08-20 | Eggshell-shaped grouting tunnel car-avoiding tunnel structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921353136.5U CN210440045U (en) | 2019-08-20 | 2019-08-20 | Eggshell-shaped grouting tunnel car-avoiding tunnel structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210440045U true CN210440045U (en) | 2020-05-01 |
Family
ID=70408850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921353136.5U Active CN210440045U (en) | 2019-08-20 | 2019-08-20 | Eggshell-shaped grouting tunnel car-avoiding tunnel structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210440045U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513121A (en) * | 2019-08-20 | 2019-11-29 | 中国电建集团贵阳勘测设计研究院有限公司 | Eggshell-shaped grouting tunnel car-avoiding tunnel structure |
-
2019
- 2019-08-20 CN CN201921353136.5U patent/CN210440045U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513121A (en) * | 2019-08-20 | 2019-11-29 | 中国电建集团贵阳勘测设计研究院有限公司 | Eggshell-shaped grouting tunnel car-avoiding tunnel structure |
| CN110513121B (en) * | 2019-08-20 | 2024-03-26 | 中国电建集团贵阳勘测设计研究院有限公司 | Eggshell-shaped grouting tunnel car-avoiding tunnel structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103758134B (en) | A kind of construction method combining Double-row Piles Support system | |
| CN107060840B (en) | A kind of construction method of large cross-section tunnel V grades of country rock excavation supportings | |
| CN107313431B (en) | Close on not contour foundation pit method for synchronously constructing | |
| CN100487224C (en) | Rapid construction method for small-section abrupt change tunnel to large-section tunnel | |
| CN102268993B (en) | Method for excavating tunnel in high liquid limit soil | |
| CN106761768B (en) | A kind of steel pipe curtain structure support system and its construction method | |
| CN103628885A (en) | Tunnel exit cover-excavation construction method of Ultra-shadow buried tunnel | |
| CN102852525A (en) | Underground tunnel enlarging and excavating method from small section of single-line tunnel to large section of double-line tunnel | |
| CN102817621B (en) | Comprehensive construction method applicable to controlling arch basement sedimentation for tunnel in unfavorable geological conditions | |
| CN102888847B (en) | Construction method free from lowering water level for local deep foundation pit of elevator shaft | |
| CN204457789U (en) | A kind of stake arch wall supports the subway station digging large diameter shield tunnel and build | |
| CN109056810A (en) | The transverse direction that open cut or lid dig underground main structure below existing building digs construction and its construction method | |
| CN210440045U (en) | Eggshell-shaped grouting tunnel car-avoiding tunnel structure | |
| CN110055973A (en) | Construction space foundation pit enclosure structure and water-stopping method under by high metal bridge in limited time | |
| CN114352292A (en) | Shallow-buried bias-pressure multi-arch tunnel construction method for weathering phyllite stratum | |
| CN100425773C (en) | Grille type connection method of rigid joint for underground continuous wall | |
| CN104074234B (en) | The interior river intake structure of electric power plant circulating water system and construction method thereof | |
| CN208815566U (en) | The transverse direction that open cut or lid dig underground main structure below existing building digs construction | |
| CN104389609A (en) | No-blasting mechanical digging method | |
| CN203741782U (en) | Multi-section face plate structure of high concrete faced rockfill dam | |
| CN214616532U (en) | Tunnel construction pilot tunnel constructional device | |
| CN206768831U (en) | Support, anchor cable post-tensioning HU type building enclosures before a kind of steel pipe | |
| CN110513121B (en) | Eggshell-shaped grouting tunnel car-avoiding tunnel structure | |
| CN211950500U (en) | Bias hole-entering structure | |
| CN210288421U (en) | Pressure irrigation type underground continuous wall supporting structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |