CN110130317A - Goaf Treatment Methods are lied prostrate on a kind of freeway tunnel - Google Patents
Goaf Treatment Methods are lied prostrate on a kind of freeway tunnel Download PDFInfo
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- CN110130317A CN110130317A CN201910377610.6A CN201910377610A CN110130317A CN 110130317 A CN110130317 A CN 110130317A CN 201910377610 A CN201910377610 A CN 201910377610A CN 110130317 A CN110130317 A CN 110130317A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000011435 rock Substances 0.000 claims abstract description 44
- 238000009412 basement excavation Methods 0.000 claims abstract description 24
- 238000010276 construction Methods 0.000 claims abstract description 17
- 239000011083 cement mortar Substances 0.000 claims abstract description 13
- 238000005086 pumping Methods 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000005065 mining Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005457 optimization Methods 0.000 abstract description 2
- 238000007569 slipcasting Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
-
- 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
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The present invention relates to goaf Treatment Methods are lied prostrate on a kind of freeway tunnel, the implementation process of the Treatment Methods specifically includes that (1) first, the discrimination formula for establishing freeway tunnel and the upper mined out section rock stratum stability critical distance of volt, determines the punishment region and non-punishment region that goaf is lied prostrate on freeway tunnel；(2) region is punished for volt goaf on freeway tunnel, section is disclosed in hole tunnel excavation goaf to be filled using concrete, the non-exposure section in goaf is filled using cement mortar, while while applying wall for grouting between concrete and cement mortar fill area to prevent water cement mortar slip casting generates spillage, running pulp phenomenon；(3) it for the non-punishment region in goaf is lied prostrate on freeway tunnel, can not punish temporarily, but tunnel excavation construction period must observe on goaf table deformation of throwing oneself on the ground, and separately punish when necessary.Meet Treatment Methods when upper volt mined-out area hazard in the process the present invention provides a kind of Optimization of Expressway Tunnel Construction, has many advantages, such as that low in cost, easy to operate, punishment effect is good.
Description
Technical field
Goaf Treatment Methods are lied prostrate on a kind of freeway tunnel, are related to geotechnical engineering, traffic engineering, mining engineering etc.
It punishes in the goaf in field.
Background technique
As economy grows continuously and fast, China just goes into overdrive to carry out infrastructure construction.Wherein, highway tunnel
Road is as the important link for linking up city, and urgently engineers and technicians capture many construction difficult problems.Freeway tunnel exists
The various unfavorable geological conditions such as goaf, karst, tomography are often met in work progress, often induce Tunnel Landslide, rock burst,
The disasters such as prominent mud, gushing water, harmful gases diffusion, not only influence construction speed, and can also jeopardize human life and wealth sometimes
Produce safety.Therefore, it is rationally and effectively punished, is had for all kinds of problems encountered during Optimization of Expressway Tunnel Construction
Important scientific research meaning and engineering application value.
The mountain ridge that freeway tunnel route selection is passed through, the exploitation that mineral resources are commonly present when previous utilize.And at present at a high speed
The goaf problem being commonly encountered when in Highway Tunnel Construction, usually the goaf tunnel Shang Chuan, handle measure are usually
Concrete match ratio grouting filling sets up viaduct leap.For goaf problem is worn under freeway tunnel, rarely has report both at home and abroad
Road.Therefore, the temporary handle measure of not formed effective economy, it would be highly desirable to establish on a kind of reliable freeway tunnel lie prostrate it is mined out
Area's Treatment Methods.
Summary of the invention
It is an object of the invention to establish to lie prostrate goaf Treatment Methods on a kind of freeway tunnel, highway is ensured
Tunnel safety construction passes through the mined out region of volt.For this purpose, the present invention provides following technical schemes.
Goaf Treatment Methods are lied prostrate on a kind of freeway tunnel, which is characterized in that main implementation steps include: (1) structure
Freeway tunnel and the upper mined out section rock stratum stability Computational Mechanics model of volt are built, is built based on non-linear cusp catastrophe theory
Vertical 10 discrimination formula of rock stratum stability critical distance determines the punishment region that goaf is lied prostrate on freeway tunnel and non-punishment
Region；(2) region is punished for volt goaf on freeway tunnel, tunnel excavation meets goaf exposure section when hole, adopts
Filling 11 is carried out with concrete；When tunnel excavation is constructed to the non-exposure area in goaf, wall for grouting 12 is applied, to prevent subsequent water
Spillage, running pulp phenomenon are generated when cement mortar mortar depositing construction；When tunnel excavation is in the non-exposure section in goaf, using cement bonded sand
Slurry carries out filling 13.(3) it for the non-punishment region in goaf is lied prostrate on freeway tunnel, can not punish temporarily, but tunnel is opened
Table deformation of throwing oneself on the ground must be observed on goaf during excavation construction, separately punished when necessary.
Freeway tunnel and the mined out section rock stratum of upper volt are approximately a rectangular slab by step (1), and when calculating is reduced to
One clamped beam, is then based on non-linear cusp catastrophe theory, considers the curved strain energy of rock beam, the increase of potential energy of system and outer
Load constructs potential function and carries out relevant calculation to function made by rock beam, obtains freeway tunnel and the upper mined out section rock of volt
10 discrimination formula (formula 1) of layer stability critical distance:
In formula,P=pw+pg-q.Wherein, L is tunnel and upper volt mined out section rock stratum span 9, and E is
Rock stratum elasticity modulus, N are horizontal crustal stress 6, and pw is goaf water-filling pressure and pg is rock beam self weight 7, and tunnel roof is to rock stratum
Support force is reduced to evenly load q and acts on rock stratum 8.
Substitution Practical Project parameter calculating can obtain freeway tunnel and the upper mined out section rock stratum stability of volt is critical
Distance 10.When tunnel and upper volt goaf distance are less than rock stratum stability critical distance 10, it can be determined as that goaf is punished
Region；When tunnel and upper volt goaf distance are greater than rock stratum stability critical distance 10, it can be determined as the non-punishment in goaf
Region.
Step (2) punishes region for volt goaf on freeway tunnel: when meeting goaf in hole tunnel excavation
Section is disclosed, carries out pumping C15 concrete filling 11 in a certain range after excavation；When tunnel excavation is constructed to the non-exposure in goaf
Area applies wall for grouting 12 using 89 steel pipe of Φ pumping C20 concrete；When tunnel excavation is in the non-exposure section in goaf, adopting
It throws oneself on the ground to do fill orifice within the scope of table on dead zone, grouting filling is carried out to goaf using 89 steel pipe of Φ pumping M5.0 cement mortar
Processing 13,14 spacing of fill orifice are 5m × 5m；Concrete 11, the filling of cement mortar 13 and wall for grouting 12 apply, and must reach
Barrel construction can be carried out after design strength.
Step (3) is for the volt non-punishment region in goaf on freeway tunnel: can not punish temporarily, but tunnel is opened
Table deformation of throwing oneself on the ground must be observed on goaf during excavation construction, separately punished when necessary.
The purposes of the above method is also claimed in the present invention, for geotechnical engineering, traffic engineering, mining engineering field
Goaf punishment.
The present invention can make up the deficiency that goaf Treatment Methods are lied prostrate on existing freeway tunnel, have low in cost, behaviour
Make the advantages that convenient, punishment effect is good.
Detailed description of the invention
Fig. 1 is the method for the present invention flow chart；
Fig. 2 is the Chongli Yu Dushan end tunnel and upper volt goaf spatial relation graph；
Fig. 3 is tunnel and the upper mined out section rock stratum stability Computational Mechanics model of volt；
Fig. 4 is that punishment sectional view in goaf is lied prostrate in left tunnel line；
Fig. 5 is the tunnel goaf Shang Fu punishment plan view；
Fig. 6 is that goaf discloses section concrete filling punishment (being subordinate to goaf punishment region)；
Fig. 7 is that wall for grouting applies and (is subordinate to goaf punishment region)；
Fig. 8 is the non-exposure section cement mortar filling punishment in goaf (being subordinate to goaf punishment region)；
In figure: 1- slopes；The goaf 2- punishment area；The non-punishment area in the goaf 3-；The left threaded list road 4-；The right threaded list road 5-；6-
Horizontal crustal stress N；The goaf 7- water-filling pressure p w and rock beam self weight pg；8- tunnel roof is to rock stratum support force q；The tunnel 9- with
Upper volt mined out section rock stratum span L；10- rock stratum stability critical distance h；11-C15 concrete filling；12-C20 concrete stops
Starch wall；The filling of 13-M5.0 cement mortar；14- fill orifice.
Specific embodiment
It introduces and lies prostrate goaf Treatment Methods on a kind of freeway tunnel.Prolong the 6th bid section of high highway (Beijing Section)
1 tunnel is set, is the tunnel Yu Dushan.Go to the capital 4 mileage ZK16+346.6~ZK20+965 of line (left line) in tunnel, long
4618.4m, tunnel go out capital line (right line) 5 mileage YK16+342~YK21+022, long 4680m, are two-way four-lane tunnel.Tunnel
Road list hole 11.0 × 5.5m of building line is separate tunnel.Tunnel's entrance and exit plane is respectively positioned on curve, and face of indulging is 2.6%
Unidirectional slope.Tunnel surveying designs initial stage, it is found that volt has camp gate exhausted area of iron mine hole exposed on the tunnel Yu Dushan Chongli end.Root
According to the position distribution at existing hole, elevation distribution situation, tentatively judge that camp gate exhausted area of iron mine will cause proposed tunnel line position
Construction and operation security hidden danger, as shown in Figure 2.
Volt goaf on the freeway tunnel is punished using the present invention, the specific steps of which are as follows:
(1) consider tunnel and upper volt mined out section rock stratum span 9, horizontal crustal stress 6, goaf water-filling pressure and rock beam
Self weight 7, tunnel roof construct freeway tunnel and the upper mined out section rock stratum stability meter of volt to factors such as rock stratum support forces 8
Mechanical model is calculated, as shown in Figure 3.
(2) it is based on non-linear cusp catastrophe theory, considers the curved strain energy of rock beam, the increase of potential energy of system and outer lotus
It carries to function made by rock beam, construct potential function and carries out relevant calculation, obtain freeway tunnel and the upper mined out section rock stratum of volt
10 discrimination formula of stability critical distance, such as shown in (formula 1).Highway tunnel can be obtained by substituting into the calculating of Practical Project parameter
Road and the upper mined out section rock stratum stability critical distance 10 of volt.When tunnel faces with upper volt goaf distance less than rock stratum stability
When boundary's distance 10, it can be determined as that region is punished in goaf；When tunnel and upper volt goaf distance are critical greater than rock stratum stability
When distance 10, it can be determined as the non-punishment region in goaf.
In this project, according to related data, goaf water-filling pressure 7 is pw=1.2MPa, edpth of tunnel 80m, side
Pressure coefficient is 1.5, and tunnel roof support force 8 is taken as 0, and elastic modulus E=1GPa, rock beam length 9 takes 30m, by each parameter generation
Enter critical safe distance formula, can acquire fast vcehicular tunnel and the upper mined out section rock stratum stability critical distance 10 of volt is 13.5m
(note: can be converted by edpth of tunnel and lateral pressure coefficient and acquire horizontal crustal stress 6).13.5m model is lied prostrate i.e. on freeway tunnel
Goaf in enclosing need to be punished, and the goaf of 13.5m or more is not required to be punished, as shown in Figure 3,4.
(3) region is punished for volt goaf on freeway tunnel: disclosing when meeting goaf in hole tunnel excavation
Section, pumping C15 concrete filling 11 is carried out in a certain range after excavation, as shown in Figure 6.It is strong that concrete filling must reach design
Barrel construction can be carried out after degree.
(4) region is punished for volt goaf on freeway tunnel: when tunnel excavation is constructed to the non-exposure in goaf
Area applies wall for grouting 12 using 89 steel pipe of Φ pumping C20 concrete, as shown in Figure 7.Wall for grouting must reach design strength rear
It can carry out barrel construction.
(8) region is punished for volt goaf on freeway tunnel: being in the non-exposure section in goaf in tunnel excavation
When, fill orifice 14 is done within the scope of table of throwing oneself on the ground on goaf, and goaf is carried out using 89 steel pipe of Φ pumping M5.0 cement mortar
Grouting filling processing 13,14 spacing of fill orifice are 5m × 5m；, as shown in Figure 8.After cement mortar filling must reach design strength
It can carry out barrel construction.
(9) for the volt non-punishment region in goaf on freeway tunnel: can not punish temporarily, but tunnel excavation is applied
Table deformation of throwing oneself on the ground must be observed on goaf between duration, separately punished when necessary.Table arrangement of throwing oneself on the ground on this region goaf 5m × 5m
Concrete pier monitoring point periodically carries out earth's surface monitoring using total station daily.
Although above-mentioned be described specific implementation process of the invention in conjunction with attached drawing, not the present invention is protected
The limitation of range.It should regard example as exemplary, and be non-limiting, the scope of the present invention has appended right to want
Ask rather than above description limit.
Claims (5)
1. lying prostrate goaf Treatment Methods on a kind of freeway tunnel, which is characterized in that main implementation steps are as follows:
(1) building freeway tunnel and the upper mined out section rock stratum stability Computational Mechanics model of volt, it is prominent based on non-linear cusp
Become theory and establish rock stratum stability critical distance (10) discrimination formula, determines the punishment region for lying prostrate goaf on freeway tunnel
With non-punishment region；
(2) region is punished for volt goaf on freeway tunnel, tunnel excavation meets goaf exposure section when hole, uses
Concrete is filled (11)；When tunnel excavation is constructed to the non-exposure area in goaf, wall for grouting (12) are applied；At tunnel excavation
When the non-exposure section in goaf, (13) are filled using cement mortar；
(3) it is not punished for the volt non-punishment region in goaf on freeway tunnel.
2. lying prostrate goaf Treatment Methods on a kind of freeway tunnel according to claim 1, which is characterized in that further include
Following steps, table deformation of throwing oneself on the ground on tunnel excavation construction period observation goaf, as thrown oneself on the ground on occurring, table deformation is punished.
3. lying prostrate goaf Treatment Methods on a kind of freeway tunnel according to claim 1, which is characterized in that high speed is public
Road tunnel and upper mined out section rock stratum stability critical distance (10) discrimination formula of volt are as follows:
In formula,P=pw+pg-q；Wherein, L is tunnel and upper volt mined out section rock stratum span (9), and E is rock stratum
Elasticity modulus, N are horizontal crustal stress (6), and pw is goaf water-filling pressure and pg is rock beam self weight (7), and tunnel roof is to rock stratum
Support force is reduced to evenly load q and acts on rock stratum (8)；
Freeway tunnel and the upper mined out section rock stratum stability critical distance of volt can be obtained by substituting into the calculating of Practical Project parameter
(10)；When tunnel and upper volt goaf distance are less than rock stratum stability critical distance (10), it can be determined as that goaf is punished
Region；When tunnel and upper volt goaf distance are greater than rock stratum stability critical distance (10), it can be determined as the non-place in goaf
Control region.
4. lying prostrate goaf Treatment Methods on a kind of freeway tunnel according to claim 1-3, feature exists
In for volt goaf punishment region on freeway tunnel:
(1) it when meeting goaf exposure section in hole tunnel excavation, carries out pumping C15 concrete filling in a certain range after excavation
(11)；
(2) when tunnel excavation is constructed to the non-exposure area in goaf, wall for grouting is applied using 89 steel pipe of Φ pumping C20 concrete
(12)；
(3) it when tunnel excavation is in the non-exposure section in goaf, throws oneself on the ground to do fill orifice within the scope of table on goaf, using Φ 89
Steel pipe pumps M5.0 cement mortar (13) and carries out grouting filling processing to goaf, and fill orifice (14) spacing is 5m × 5m；
(4) concrete (11), cement mortar (13) filling and wall for grouting (12) apply, and can carry out after must reaching design strength
Barrel construction.
5. lying prostrate the purposes of goaf Treatment Methods, feature on a kind of described in any item freeway tunnels of claim 1-4
It is, the goaf for geotechnical engineering, traffic engineering, mining engineering field is punished.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910377610.6A CN110130317A (en) | 2019-05-07 | 2019-05-07 | Goaf Treatment Methods are lied prostrate on a kind of freeway tunnel |
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| CN201910377610.6A CN110130317A (en) | 2019-05-07 | 2019-05-07 | Goaf Treatment Methods are lied prostrate on a kind of freeway tunnel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117077244A (en) * | 2023-07-03 | 2023-11-17 | 中国地质大学（北京） | Method and device for optimizing tunnel structure of bending zone penetrating through mining subsidence area |
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2019
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Application publication date: 20190816 |