CN110513121B - Eggshell-shaped grouting tunnel car-avoiding tunnel structure - Google Patents
Eggshell-shaped grouting tunnel car-avoiding tunnel structure Download PDFInfo
- Publication number
- CN110513121B CN110513121B CN201910769342.2A CN201910769342A CN110513121B CN 110513121 B CN110513121 B CN 110513121B CN 201910769342 A CN201910769342 A CN 201910769342A CN 110513121 B CN110513121 B CN 110513121B
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- tunnel
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- 238000009412 basement excavation Methods 0.000 claims abstract description 21
- 238000010276 construction Methods 0.000 abstract description 14
- 239000011435 rock Substances 0.000 abstract description 3
- 230000000007 visual effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 5
- 238000005422 blasting Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 230000005641 tunneling Effects 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
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention 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 vehicle-avoiding hole is provided with a left arc section and a right arc section, one section is in arc shape and is consistent with the arc of the top wall of the grouting tunnel, the other section is in an elliptical arc shape, the middle point position height of the top wall of the two arc sections is consistent with the middle point position height of the arc of the top wall of the grouting tunnel, and the elliptical arc section of the top wall of the vehicle-avoiding hole is horizontally and smoothly transited with the arc section of the vehicle-avoiding hole at the middle point positions of the top walls of the arc shapes at two ends. The surrounding rock stress deformation self-adaptation capability is strong, the structural stress condition is good, the construction safety can be effectively ensured in the excavation construction period, the top space is fully utilized, the excavation engineering quantity is effectively reduced compared with a rectangular section, an open visual space is created in a narrow tunnel space, and a good working environment is created for later grouting construction.
Description
Technical Field
The invention relates to an eggshell-shaped grouting tunnel car-avoiding tunnel structure.
Background
In recent years, along with the western shift of a main battlefield of hydropower development, the karst tunnel scale is rapidly increased particularly in southwest mountain areas, due to the restriction of various factors such as karst development, complex topography and geological conditions and the like. And the method is influenced by the external built tunnel, so that the drilling and blasting method is often limited to a certain extent. The hydraulic tunnel excavation mode is gradually developed to the urban complicated tunnel TBM excavation mode. Because the hydraulic grouting tunnel is generally short in length, a small 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 tunneling machine equipment matched with tunneling excavation is about 18 multiplied by 3.6m.
Compared with the drilling and blasting method, the size of the heading machine is larger, the space of the needed vehicle-avoidance hole is larger, in addition, the vehicle-avoidance hole is generally arranged on one side of the vertical tunnel axis, and the section shape and the size are not easy to control during excavation. In addition, as the width of the refuge tunnel is larger, the excavation height is increased in order to ensure the safety of the tunnel (a certain safety aspect ratio), the excavation engineering amount is increased, and the economical efficiency is reduced. Under the condition that the excavation condition of the existing grouting tunnel allows, the drilling and blasting method is preferably selected for construction, and at the moment, the needed vehicle-avoiding tunnel is smaller in size and free of related problems. In the prior art, the design method of the section is safe and economical, which is caused by the increase of the excavation size of the refuge tunnel.
Disclosure of Invention
In order to solve the technical problems, the invention provides the eggshell-shaped grouting tunnel car-avoiding structure, which solves the problem that the geological conditions and the construction environment of the existing hydraulic grouting tunnel are complex, and the car-avoiding excavation size cannot be unified and coordinated in terms of safety and economy through the structural arrangement of the top wall of the car-avoiding tunnel.
The invention is realized by the following technical scheme.
The invention 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 vehicle-avoiding hole is provided with a left arc section and a right arc section, one section is in arc shape and is consistent with the arc of the top wall of the grouting tunnel, the other section is in an elliptical arc shape, the middle point position height of the top wall of the two arc sections is consistent with the middle point position height of the arc of the top wall of the grouting tunnel, and the elliptical arc section of the top wall of the vehicle-avoiding hole is horizontally and smoothly transited with the arc section of the vehicle-avoiding hole at the middle point positions of the top walls of the arc shapes at two ends.
And the car-avoiding tunnel is arranged 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 vehicle-avoiding hole is 4.9m.
The height of the edge of the top wall of the elliptical arc section of the vehicle-avoiding hole is 2.5m.
And a drainage ditch is excavated 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 refuge tunnel.
And the bottom plates of the grouting tunnel and the vehicle-avoiding tunnel incline from top to bottom to the excavation position of the drainage ditch.
The cross-sectional specification of the drainage ditch is 0.3m multiplied by 0.2m.
The invention has the beneficial effects that: the surrounding rock stress deformation self-adaptation capability is strong, the structural stress condition is good, the construction safety can be effectively guaranteed in the excavation construction period, the top space is fully utilized, the excavation engineering quantity is effectively reduced compared with a rectangular section, an open visual space is created in a narrow tunnel space, and a good working environment is created for later grouting construction.
Drawings
FIG. 1 is a schematic diagram of the structure 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 of the vehicle-shelter portion in fig. 1.
In the figure: 1-primary concrete, 2-secondary reinforced concrete lining, 3-anti-platform anchor rods, 4-drainage ditches, 5-consolidation grouting, 6-backfill grouting, 7-grouting tunnels and 8-refuge 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 above.
An eggshell-shaped grouting tunnel car-avoiding tunnel structure as shown in fig. 1 to 3 comprises a grouting tunnel 7 and a car-avoiding tunnel 8 in the middle section of the grouting tunnel 7; the top wall of the vehicle-avoiding hole 8 is provided with left and right arc sections, 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, the middle point position height of the top wall of the two arc sections is consistent with the middle point position height of the arc of the top wall of the grouting tunnel 7, and the arc-shaped sections of the top wall of the vehicle-avoiding hole 8 are horizontally and smoothly transited at the middle point positions of the arc-shaped top walls at two ends.
The car-avoiding holes 8 are arranged on the grouting tunnel 7 at intervals of 200 m.
The height of the middle point of the top walls of the two arc-shaped sections of the vehicle-avoiding hole 8 is 4.9m.
The height of the edge of the top wall of the elliptical arc section of the vehicle-avoiding hole 8 is 2.5m.
And a drainage ditch 4 is excavated at the bottom of the inner side wall of the grouting tunnel 7, and the drainage ditch 4 extends along the bottom of the side wall of the elliptical arc section of the vehicle-avoiding tunnel 8.
The bottom plates of the grouting tunnel 7 and the vehicle-avoiding tunnel 8 incline from top to bottom to the excavation position of the drainage ditch 4.
The cross-sectional dimension of the drain 4 is 0.3m×0.2m.
Specifically, according to the eggshell-shaped grouting tunnel car-avoiding structure, according to the setting requirement of hydraulic grouting tunnels on car-avoiding holes, the distance is about 200m, one is set, grouting equipment is placed in order to solve the problem of later grouting construction, the later period of the car-avoiding holes is rebuilt into equipment holes, the height of the car-avoiding holes is kept to be 4.9m as high as that of the grouting tunnels, and the positions of side walls are gradually changed to be 2.5m; the bottom plate at one side of the side wall is provided with a drainage ditch with the diameter of 0.3 multiplied by 0.2m, the section of the vehicle-avoiding hole is provided with a drainage gradient with the diameter of i=0.005, a drainage facility is not required, and water in the hole can flow out of the hole along the drainage ditches at the two sides. The excavation flow of the invention is specifically as follows:
and (3) excavating:
and (3) a second stage support construction step:
thus, the present invention:
(1) The cavity excavation section circle degree obtained by fully combining the excavator excavation is high, the eggshell-shaped vehicle-avoiding cavity excavation section form is adopted, the surrounding rock stress deformation self-adaption capability is strong, the eggshell-shaped structure stress condition is good, and the construction safety can be effectively ensured in the excavation construction period.
(2) Under the condition of ensuring safety, the egg shell-shaped vehicle-avoiding hole section fully utilizes the top space, effectively reduces the amount of excavated engineering compared with the rectangular section, and plays a certain economic role.
(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 problem that grouting equipment is placed in later grouting construction, a car-avoiding hole is rebuilt into equipment hole in later period, and the multi-purpose function of one hole is achieved.
Claims (5)
1. The utility model provides an eggshell-shaped grouting tunnel refuge hole structure, includes grouting tunnel (7) and refuge hole (8) in grouting tunnel (7) middle section, its characterized in that: the top wall of the vehicle-avoiding hole (8) is provided with a left arc section and a right arc section, one arc section is in arc shape and is consistent with the arc of the top wall of the grouting tunnel (7), the other arc section is in an elliptical arc shape, the middle point position height of the top wall of the two arc sections is consistent with the middle point position height of the arc of the top wall of the grouting tunnel (7), and the elliptical arc section of the top wall of the vehicle-avoiding hole (8) is horizontally and smoothly transited with the arc section of the vehicle-avoiding hole (8) at the middle point positions of the arc top walls at two ends;
the vehicle-avoiding tunnel (8) is arranged on the grouting tunnel (7) at intervals of 200 m; the grouting tunnel (7) is characterized in that a drainage ditch (4) is excavated at the bottom of the inner side wall of the grouting tunnel, and the drainage ditch (4) extends along the bottom of the side wall of the elliptical arc section of the vehicle-avoiding tunnel (8).
2. The eggshell-shaped grouting tunnel car-shelter structure as claimed in claim 1, wherein: the height of the middle point of the top walls of the two arc-shaped sections of the vehicle-avoiding hole (8) is 4.9m.
3. The eggshell-shaped grouting tunnel car-shelter structure as claimed in claim 1, wherein: the height of the edge of the top wall of the elliptical arc section of the vehicle-avoiding hole (8) is 2.5m.
4. The eggshell-shaped grouting tunnel car-shelter structure as claimed in claim 1, wherein: the bottom plates of the grouting tunnel (7) and the vehicle-avoiding tunnel (8) incline from top to bottom to the excavation position of the drainage ditch (4).
5. The eggshell-shaped grouting tunnel car-shelter structure as claimed in claim 1, wherein: the cross section specification of the drainage ditch (4) is 0.3mX0.2m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910769342.2A CN110513121B (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 |
|---|---|---|---|
| CN201910769342.2A CN110513121B (en) | 2019-08-20 | 2019-08-20 | Eggshell-shaped grouting tunnel car-avoiding tunnel structure |
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| CN110513121A CN110513121A (en) | 2019-11-29 |
| CN110513121B true CN110513121B (en) | 2024-03-26 |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH064200U (en) * | 1992-06-24 | 1994-01-18 | 宮坂ゴム株式会社 | Waterproof structure of the shelter in the tunnel |
| CN102678127A (en) * | 2011-03-09 | 2012-09-19 | 董勤银 | Method for constructing weakly consolidated non-stratified sandstone tunnel |
| CN105233688A (en) * | 2015-11-03 | 2016-01-13 | 浙江海洋学院 | Ventilating and purifying structure of tunnel and ventilating and purifying method thereof |
| CN205591930U (en) * | 2016-04-26 | 2016-09-21 | 中铁第四勘察设计院集团有限公司 | Tunnel hole room |
| CN107130964A (en) * | 2016-11-11 | 2017-09-05 | 新疆北方建设集团有限公司 | Small-sized tunnel mud stone excavation construction method |
| CN108468555A (en) * | 2017-12-27 | 2018-08-31 | 中铁二院工程集团有限责任公司 | A kind of lining cutting of single-track railway floor type and its drainage system construction that inspection shaft is set using refuge chamber |
| CN208023440U (en) * | 2017-05-27 | 2018-10-30 | 张平 | A kind of subway tunnel luminous road tooth |
| CN208072350U (en) * | 2017-09-05 | 2018-11-09 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of diversion tunnel refuge chamber reconstruction structure |
| CN110030001A (en) * | 2019-05-30 | 2019-07-19 | 广西大学 | A kind of construction method that mountain tunnel is appeared |
| CN210440045U (en) * | 2019-08-20 | 2020-05-01 | 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 CN201910769342.2A patent/CN110513121B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH064200U (en) * | 1992-06-24 | 1994-01-18 | 宮坂ゴム株式会社 | Waterproof structure of the shelter in the tunnel |
| CN102678127A (en) * | 2011-03-09 | 2012-09-19 | 董勤银 | Method for constructing weakly consolidated non-stratified sandstone tunnel |
| CN105233688A (en) * | 2015-11-03 | 2016-01-13 | 浙江海洋学院 | Ventilating and purifying structure of tunnel and ventilating and purifying method thereof |
| CN205591930U (en) * | 2016-04-26 | 2016-09-21 | 中铁第四勘察设计院集团有限公司 | Tunnel hole room |
| CN107130964A (en) * | 2016-11-11 | 2017-09-05 | 新疆北方建设集团有限公司 | Small-sized tunnel mud stone excavation construction method |
| CN208023440U (en) * | 2017-05-27 | 2018-10-30 | 张平 | A kind of subway tunnel luminous road tooth |
| CN208072350U (en) * | 2017-09-05 | 2018-11-09 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of diversion tunnel refuge chamber reconstruction structure |
| CN108468555A (en) * | 2017-12-27 | 2018-08-31 | 中铁二院工程集团有限责任公司 | A kind of lining cutting of single-track railway floor type and its drainage system construction that inspection shaft is set using refuge chamber |
| CN110030001A (en) * | 2019-05-30 | 2019-07-19 | 广西大学 | A kind of construction method that mountain tunnel is appeared |
| CN210440045U (en) * | 2019-08-20 | 2020-05-01 | 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 |
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| CN110513121A (en) | 2019-11-29 |
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