CN106049418A - Combined grouting reinforcement method for tunnel surface in shallow buried traversing faultage - Google Patents
Combined grouting reinforcement method for tunnel surface in shallow buried traversing faultage Download PDFInfo
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- CN106049418A CN106049418A CN201610459427.7A CN201610459427A CN106049418A CN 106049418 A CN106049418 A CN 106049418A CN 201610459427 A CN201610459427 A CN 201610459427A CN 106049418 A CN106049418 A CN 106049418A
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 230000002787 reinforcement Effects 0.000 title abstract description 8
- 238000010276 construction Methods 0.000 claims abstract description 208
- 239000004568 cement Substances 0.000 claims abstract description 64
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims abstract description 43
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 43
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000004411 aluminium Substances 0.000 claims abstract description 43
- 229910021653 sulphate ion Inorganic materials 0.000 claims abstract description 43
- 238000005728 strengthening Methods 0.000 claims abstract description 39
- 239000011440 grout Substances 0.000 claims abstract description 30
- 230000003014 reinforcing effect Effects 0.000 claims description 80
- 230000000694 effects Effects 0.000 claims description 66
- 238000007569 slipcasting Methods 0.000 claims description 62
- 238000007596 consolidation process Methods 0.000 claims description 58
- 238000003325 tomography Methods 0.000 claims description 55
- 239000011257 shell material Substances 0.000 claims description 25
- 238000012360 testing method Methods 0.000 claims description 4
- 229910052717 sulfur Inorganic materials 0.000 claims description 2
- 239000011593 sulfur Substances 0.000 claims description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims 1
- 150000004645 aluminates Chemical class 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 18
- 239000011435 rock Substances 0.000 abstract description 11
- 238000010008 shearing Methods 0.000 abstract description 8
- 201000010099 disease Diseases 0.000 abstract description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000008595 infiltration Effects 0.000 abstract 1
- 238000001764 infiltration Methods 0.000 abstract 1
- 230000000704 physical effect Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
- 239000002002 slurry Substances 0.000 description 33
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 12
- 238000013461 design Methods 0.000 description 12
- 239000007788 liquid Substances 0.000 description 12
- 239000011701 zinc Substances 0.000 description 12
- 229910052725 zinc Inorganic materials 0.000 description 12
- 238000011049 filling Methods 0.000 description 7
- 230000011218 segmentation Effects 0.000 description 7
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 238000005553 drilling Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000007689 inspection Methods 0.000 description 5
- 230000000149 penetrating effect Effects 0.000 description 5
- 229910000329 aluminium sulfate Inorganic materials 0.000 description 4
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 4
- 235000011128 aluminium sulphate Nutrition 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 4
- 238000012942 design verification Methods 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000012945 sealing adhesive Substances 0.000 description 4
- 238000004904 shortening Methods 0.000 description 4
- 238000003892 spreading Methods 0.000 description 4
- 230000007480 spreading Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000007712 rapid solidification Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000007582 slurry-cast process Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- GQCYCMFGFVGYJT-UHFFFAOYSA-N [AlH3].[S] Chemical compound [AlH3].[S] GQCYCMFGFVGYJT-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000000280 densification Methods 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
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- 238000012545 processing Methods 0.000 description 1
- 238000007430 reference method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- -1 sulfur aluminate Chemical class 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 239000003643 water by type Substances 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
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
- E21D9/002—Injection methods characterised by the chemical composition used
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Agronomy & Crop Science (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a combined grouting reinforcement method for a tunnel surface in a shallow buried traversing faultage. The combined grouting reinforcement method comprises the following steps that the surface of a to-be-constructed tunnel trunk in a shallow buried section is divided into a plurality of construction sections, and the stratums on two sides of the tunnel trunks and the stratums above the tunnel trunks in the construction sections are respectively filled with sulphate aluminium cement grout and cement grout. The combined grouting reinforcement method can be suitable for the geological condition of a weak and soft zone in the faultage, the physical properties and the mechanical properties of surrounding rocks in the weak and soft zone in the faultage can be improved, the compressive strength and the shearing strength of the stratums and the self-stabilization capacity of surrounding rocks in the faultage can be improved, and the purpose of stratum strengthening and leakage stoppage can be achieved by improving the infiltration capacity of the stratums, so that the construction risk can be controlled, the tunnel construction can be avoided, and the construction period is beneficial for being shortened; and besides, the combined grouting reinforcement method can also be suitable for complex geology conditions, such as a weak and soft surrounding rock zone, a water-rich stratum zone and a shallow buried section, and can also be suitable for a narrow-site reinforcement project and a disease treatment project.
Description
Technical field
The present invention relates to tunnel underground structrue engineering technical field, pass through earth's surface, tomography tunnel group particularly to a kind of shallow embedding
Close grouting strengthening method.
Background technology
Along with quickening, a large amount of constructions of Tunnel Engineering of domestic infrastructure construction, will inevitably run into will be to length
Distance shallow embedding is passed through the mountain tunnel of tomography weakness band and is constructed, and passes through the landform at the mountain tunnel place of tomography weakness band
The area that landforms usually surface water easily collects, and the tomography lithology of tomography weakness band that mountain tunnel passes through is mainly tomography
Mud, local are fault breccia and cataclasite so that this mountain tunnel passing through tomography weakness band to have resistance to compression shearing resistance strong
Spend low, meet water easily soften, without self-stable ability, consolidation densification and the feature of rich water, these increase construction wind to a great extent
Danger.
But, in prior art, lack the mountain tunnel that can be used for distance shallow embedding is passed through tomography weakness band and carry out
The construction method of construction, and because the geological condition of the mountain tunnel passing through tomography weakness band is the most special, it is available for the construction used for reference
Method is also little, uses the construction method of routine to construct the mountain tunnel of this type of geological condition, there is the biggest executing
Work risk, also can make construction risk become the most uncontrollable, extend the construction period the most to a certain extent.
Summary of the invention
It is an object of the invention to overcome the above-mentioned deficiency in the presence of prior art, it is provided that one can be applicable to tomography
Ground, tomography tunnel table pack grouting strengthening method is passed through in the shallow embedding of weak band geological condition, and earth's surface, tomography tunnel group is passed through in this shallow embedding
Close grouting strengthening method and can improve the country rock Physical and mechanical properties of tomography weakness band, the resistance to compression shearing strength on stratum can be improved
With the self-stable ability of tomography country rock, the purpose of strengthening stratum and impervious leakage-stopping also can be realized by the penetrating power improving stratum,
So that construction risk becomes controlled, contribute to shortening the construction period；It addition, tomography tunnel is passed through in the shallow embedding that the present invention provides
Ground table pack grouting strengthening method can also be applicable to the Complicated Geologic Conditions such as weak surrounding rock band, water rich strata band, shallow embedding location,
It is equally applicable to reinforcing engineering and the disease management engineering of narrow space.
In order to realize foregoing invention purpose, the invention provides techniques below scheme:
Ground, tomography tunnel table pack grouting strengthening method is passed through in a kind of shallow embedding, is divided on Shallow Section tunnel trunk earth's surface to be onstructed
Multiple construction sections, and the stratum, both sides and stratum, top to the tunnel trunk of construction section note sulphate aluminium cement serosity and water respectively
Slurry liquid.
In technical scheme of the present invention, Shallow Section tunnel trunk earth's surface to be onstructed is divided into multiple construction section, this
Sample makes Shallow Section of the present invention with passing through tomography tunnel table pack grouting strengthening method can be used in the construction of distance, and
The Shallow Section tunnel trunk earth's surface of distance is divided into multiple construction section, is so advantageously implemented section construction and segmentation checking,
Parallel operations can also be realized with barrel construction, construction risk can not only be realized controlled, but also be avoided that interference constructing tunnel,
Contribute to shortening the construction period.
After Shallow Section tunnel trunk earth's surface to be onstructed is divided into multiple construction section, the tunnel trunk to each construction section
Stratum, both sides and stratum, top note sulphate aluminium cement serosity and cement grout the most respectively；Wherein, two to tunnel trunk
After the note sulphate aluminium cement serosity of stratum, side, because aluminium sulfate has the feature of quick setting early strength, sulphate aluminium cement serosity exists
After pressure effect retrofilling formation pore, meeting rapid solidification, cuts off and plugs water stream channel, also making the both sides of tunnel trunk
The Physical and mechanical properties on stratum is improved, and improves and define between stratum, both sides and mini-valve tube after Physical and mechanical properties
Effective steel pipe building enclosure and waterproof of man, the penetrating power also by the stratum, both sides improving tunnel trunk achieves reinforcing
Stratum and the purpose of impervious leakage-stopping；
After to cementing serosity in stratum above Shallow Section tunnel trunk, the physics on stratum, top of tunnel trunk, mechanical property
Can also be improved, and between above-mentioned building enclosure, be formed effective leading pre-supporting system；
In addition, sulphate aluminium cement slurry is noted on stratum, both sides and stratum, top to the tunnel trunk of each construction section respectively
After liquid and cement grout, the serosity after gelling serve consolidation reinforcing body effect so that the resistance to compression shearing strength of reinforcing body and
Self-stable ability is improved.
Therefore, the present invention provide pass through tomography tunnel combination grouting strengthening method can also be applicable to weak surrounding rock band,
The Complicated Geologic Conditions such as water rich strata band, shallow embedding location, it is possible to be applicable to reinforcing engineering and the disease management engineering of narrow space.
As the preferred version of the present invention, multiple above-mentioned construction sections are followed successively by the first construction section, the second construction from rear to front
Section ..., the n-th construction section；
Wherein, n >=2, and n is natural number.
It is further preferred that ground, tomography tunnel table pack grouting strengthening method is passed through in shallow embedding of the present invention, including as follows
Step:
Step 1: stratum, the both sides note sulphate aluminium cement serosity to the tunnel trunk of the first construction section；
Step 2: stratum, the top cementing serosity to the tunnel trunk of the first construction section, now, adds the first construction section slip casting
Consolidation bundle；
Step 3: stratum, the both sides note sulphate aluminium cement serosity to the tunnel trunk of the second construction section；
Step 4: stratum, the top cementing serosity to the tunnel trunk of the second construction section, now, adds the second construction section slip casting
Consolidation bundle；
……；
Step m: stratum, the both sides note sulphate aluminium cement serosity to the tunnel trunk of the n-th construction section；
Step (m+1): stratum, the top cementing serosity to the tunnel trunk of the n-th construction section, now, to the n-th construction section slip casting
Reinforcing terminates；
Wherein, m >=3, and m is odd number.
In technical scheme of the present invention, above-mentioned steps 1 and step 2 are the slip casting of the tunnel trunk to the first construction section
Reinforce: after formerly to stratum, the both sides note sulphate aluminium cement serosity of the tunnel trunk of the first construction section, then to the first construction section
Stratum, the top cementing serosity of tunnel trunk；Above-mentioned steps 3 and step 4 are the slip casting of the tunnel trunk to the second construction section
Reinforce: first sulphate aluminium cement serosity is noted, then to the second construction section in the stratum, both sides of the tunnel trunk of the second construction section
Stratum, the top cementing serosity of tunnel trunk；……；Above-mentioned steps m and step (m+1) are the tunnel trunks to the n-th construction section
Grouting and reinforcing: ibid, be also stratum, the both sides note sulphate aluminium cement serosity of first tunnel trunk to the n-th construction section, then
Stratum, top cementing serosity to tunnel trunk again；It follows that ground, tomography tunnel table pack is passed through in shallow embedding of the present invention
Grouting strengthening method is to use segmentation, ecto-entad, retreat the mode of slip casting from bottom to top, on the one hand, convenient operation, it is possible to use
In long distance construction so that the shallow embedding that the present invention provides passes through ground, tomography tunnel table pack grouting strengthening method not by boundary of works area
Restriction, universality is good, on the other hand, additionally aid enhancing described shallow embedding pass through tomography tunnel ground table pack grouting strengthening method
Consolidation effect to tunnel trunk.
It is further preferred that in above-mentioned steps 2, stratum cement injection above the tunnel trunk to the first construction section
After liquid, carry out the checking of slip casting for the first time, to sentence knowledge consolidation effect, if consolidation effect reaches requirement, then to the first construction section note
Slurry reinforcing terminates, and otherwise, returns step 1 or step 2.
In technical scheme of the present invention, stratum cementing serosity above the tunnel trunk to the first construction section
After, according to the distribution characteristics of serosity during actual (design) grouting amount and slip casting thereof, to slip casting weak part that may be present
(blind area) arranges inspection hole targetedly, tests by the seriality of the core-taking rate and core sample checking hole is carried out slip casting for the first time
Card such that it is able to sentence and know whether the grouting and reinforcing to the first construction section meets the requirement of design verification index, whether there is blind area,
And in this, as the foundation whether excavated in sentencing knowledge Tunnel；If consolidation effect meets requirement, then to the first construction section slip casting
Reinforcing terminates, if the consolidation effect on the stratum, both sides of the tunnel trunk of the first construction section is not met requirement, then returns
State step 1 grouting and reinforcing again, want if the consolidation effect on the stratum, top of the tunnel trunk of the first construction section is met
Ask, then return above-mentioned steps 2 grouting and reinforcing again, until to the stratum, both sides of the tunnel trunk of the first construction section and stratum, top
Consolidation effect all meet requirement, the second construction section could be carried out grouting and reinforcing, so can guarantee that reasonable grouting and reinforcing
Effect.
It is further preferred that in above-mentioned steps 4, stratum cement injection above the tunnel trunk to the second construction section
After liquid, carry out second time slip casting checking, to sentence knowledge consolidation effect, if consolidation effect reaches requirement, then to the second construction section note
Slurry reinforcing terminates, and otherwise, returns step 3 or step 4.
Same as above, above the tunnel trunk to the second construction section after stratum cementing serosity, (set according to reality
Meter) distribution characteristics of serosity during grouting amount and slip casting thereof, (blind to slip casting weak part that may be present on the second construction section
District) inspection hole is set targetedly, verify by the seriality of the core-taking rate and core sample checking hole is carried out second time slip casting,
And then sentence whether knowledge meets the requirement of design verification index to the grouting and reinforcing of the second construction section and whether there is blind area, and with this
As the foundation whether excavated in sentencing knowledge Tunnel；If consolidation effect meets requirement, then to the second construction section grouting and reinforcing knot
Bundle, otherwise, returns above-mentioned steps 3 or step 4, if particularly as follows: adding the stratum, both sides of the tunnel trunk of the second construction section
Gu effect does not meet requirement, then return above-mentioned steps 3 grouting and reinforcing again, if upper to the tunnel trunk of the second construction section
The consolidation effect on stratum, side does not meet requirement, then return above-mentioned steps 4 grouting and reinforcing again, until the tunnel to the second construction section
The stratum, both sides of road barrel and the consolidation effect on stratum, top all meet requirement, next construction section could be carried out slip casting and add
Gu, so can guarantee that reasonable grouting consolidation effect.
It is further preferred that in above-mentioned steps (m+1), stratum water filling above the tunnel trunk to the n-th construction section
After slurry liquid, carry out n-th slip casting checking, to sentence knowledge consolidation effect, if consolidation effect reaches requirement, then to the n-th construction section
Grouting and reinforcing terminates, and otherwise, returns step m or step (m+1).
Same as above, slip casting weak part (blind area) that may be present on the n-th construction section is arranged inspection hole, by inspection
The seriality of the core-taking rate and core sample of looking into hole carries out n-th slip casting checking, knows the grouting and reinforcing to the n-th construction section the most completely to sentence
The foot requirement of design objective and whether there is blind area, also in this, as the foundation whether excavated in sentencing knowledge Tunnel；If reinforced
Effect meets requirement, then terminate the grouting and reinforcing of the n-th construction section, otherwise, returns step m or step (m+1), particularly as follows: such as
Fruit does not meet requirement to the consolidation effect on the stratum, both sides of the tunnel trunk of the n-th construction section, then return above-mentioned steps m and again note
Slurry is reinforced, if the consolidation effect on the stratum, top of the tunnel trunk of the second construction section is not met requirement, then returns above-mentioned
Step (m+1) grouting and reinforcing again, until to the stratum, both sides of the tunnel trunk of the n-th construction section and the consolidation effect on stratum, top
All meet requirement, the grouting and reinforcing to the n-th construction section could be terminated, so can guarantee that reasonable grouting consolidation effect.
As the preferred version of the present invention, use the first mini-valve tube that the stratum, both sides of the tunnel trunk of construction section is noted sulfur aluminum
Acid salt cement serosity, and use second mini-valve tube cementing serosity in stratum, top to the tunnel trunk of construction section.
In technical scheme of the present invention, the first mini-valve tube and the second mini-valve tube are all unidirectional closing devices, during slip casting,
The Injection Section of mini-valve tube can not return slurry under the effect of slurry casting machine two ends stop grouting plug, it is achieved that the continuous rising of grouting pressure；With
Grouting pressure constantly to raise, when mini-valve tube overpressure is more than mini-valve tube pipe external pressure, serosity under pressure will sleeve
The sealing adhesive tape (rubber case) of valve tube wall parcel slip casting aperture is washed open, and serosity rushes the press-in of broken sleeve shell material under pressure and reinforces
Body, forces the intrapore water and air of reinforcing body to be discharged, and it is carried out filling and parcel, so makes the reinforcing after reinforcing
The Physical and mechanical properties of body be improved significantly, its resistance to compression shearing strength and stability are also greatly improved；It addition, stop grouting plug is also
In the range of serosity being limited to any layer, it is achieved in the purpose that reinforcing body segmentation is reinforced, moreover it is possible to realize reinforcing blind area
After-teeming；When mini-valve tube pipe external pressure is more than mini-valve tube overpressure, under pressure, damaged sealing adhesive tape (rubber case)
Wrappage can realize Guan Bi automatically so that serosity can not return in mini-valve tube pipe.
It is further preferred that before the note sulphate aluminium cement serosity of the stratum, both sides of the tunnel trunk to construction section, right
The Pipe installing hole on construction section annulus note sleeve shell material respectively and between above-mentioned first mini-valve tube and the second mini-valve tube.
In technical scheme of the present invention, the Pipe installing hole that sleeve shell material is used in closure construction section is respectively with above-mentioned
Annulus between first mini-valve tube and the second mini-valve tube, after note sleeve shell material, sleeve shell material will at the first mini-valve tube and
Form the protective layer with some strength around second mini-valve tube, can prevent serosity from fleeing hither and thither when slip casting, again can be at note
During slurry, serosity racks stratum as required, plays the purpose of layering, segmenting slip casting；It addition, divide in the Pipe installing hole of construction section
Note sleeve shell material in annulus not and between the first mini-valve tube and the second mini-valve tube, moreover it is possible to prevent mini-valve tube during slip casting
Deformation, displacement or damaged, also can guarantee that injection slurry passes through.Therefore, to the Pipe installing hole on construction section respectively with above-mentioned
Annulus note sleeve shell material between first mini-valve tube and the second mini-valve tube, it is possible to ensure reasonable grouting consolidation effect.
As the preferred version of the present invention, sulphate aluminium cement serosity is noted on the stratum, both sides of the tunnel trunk of construction section
Grouting pressure controls at 1.5 ~ 4.0MPa.
In technical scheme of the present invention, the stratum, both sides of the tunnel trunk to construction section is noted sulphate aluminium cement slurry
The grouting pressure of liquid controls at 1.5 ~ 4.0MPa, it is possible to effectively control range of grouting, moreover it is possible to avoid grout and grout leaking, if slip casting
Pressure is less than 1.5MPa, then sulphate aluminium cement serosity just can not rush broken sleeve shell material and is pressed into reinforcing body it is carried out filling and bag
Wrap up in, the most all can not wash the sealing adhesive tape being wrapped in the first mini-valve tube tube wall open, thus have influence on grouting consolidation effect, if note
Slurry pressure, more than 4.0MPa, the most not only there will be the phenomenon of grout and grout leaking, and range of grouting can be made to become uncontrollable.
Grouting pressure as the preferred version of the present invention, to stratum, the top cementing serosity of the tunnel trunk of construction section
Control at 1.5 ~ 4.0MPa.
Same as above, the grouting pressure of stratum, the top cementing serosity of the tunnel trunk to construction section is controlled 1.5 ~
4.0MPa, it is possible to effectively control range of grouting, moreover it is possible to avoid grout and grout leaking, if grouting pressure is less than 1.5MPa, then cement
Serosity just can not rush broken sleeve shell material and be pressed into reinforcing body it is carried out filling and parcel, the most all can not wash open and be wrapped in the second sleeve
The sealing adhesive tape of valve tube wall, thus have influence on grouting consolidation effect, if grouting pressure is more than 4.0MPa, then there will be grout
With the phenomenon of grout leaking, range of grouting also can be made to become uncontrollable.
In technical scheme of the present invention, all it is not specifically noted, all can be by using the conventional skill in this area
Art means realize.
In sum, compared with prior art, there is advantages that
1, in technical scheme of the present invention, first, Shallow Section tunnel trunk earth's surface to be onstructed is divided into multiple construction section,
So make shallow embedding of the present invention pass through ground, tomography tunnel table pack grouting strengthening method and can be used in the construction of distance, and
The tunnel trunk of distance is divided into multiple construction section, is so advantageously implemented section construction and segmentation checking, moreover it is possible to and barrel
Construction realizes parallel operations, can not only realize construction risk controlled, but also be avoided that interference constructing tunnel, contributes to shortening
Construction period；Secondly, after stratum, the both sides note sulphate aluminium cement serosity to tunnel trunk, because aluminium sulfate has fast solidifying
The strongest feature, after sulphate aluminium cement serosity filling formation pore under pressure, meeting rapid solidification, cuts off and plugs
Water stream channel, also makes the Physical and mechanical properties on the stratum, both sides of tunnel trunk be improved, and improves Physical and mechanical properties
After stratum, both sides and mini-valve tube between define effective building enclosure and waterproof of man, also by reduce tunnel trunk two
The penetrating power on stratum, side achieves the purpose of strengthening stratum and impervious leakage-stopping；Finally, stratum above tunnel trunk is being noted
After cement grout, the Physical and mechanical properties on the stratum, top of tunnel trunk is also improved, and shape between above-mentioned building enclosure
Become effective leading pre-supporting system；In addition, stratum, both sides and the stratum, top to the tunnel trunk of each construction section
After noting sulphate aluminium cement serosity and cement grout respectively, the serosity after gelling serves the effect of consolidation reinforcing body so that add
The resistance to compression shearing strength of solid and self-stable ability are improved；
2, of the present invention pass through tomography tunnel combination grouting strengthening method use segmentation, ecto-entad, from bottom to top after
Move back the mode of slip casting, on the one hand, convenient operation, it is possible to for long distance construction so that tomography is passed through in the shallow embedding that the present invention provides
Ground, tunnel table pack grouting strengthening method is not limited by boundary of works area, and universality is good, on the other hand, additionally aids enhancing described
Ground, the tomography tunnel table pack grouting strengthening method consolidation effect to tunnel trunk is passed through in shallow embedding；
3, in technical scheme of the present invention, after each construction section grouting and reinforcing is terminated, slip casting checking is all carried out, so
Can sentence and know whether the grouting and reinforcing to construction section meets the requirement of design verification index, whether there is blind area, can not only ensure
Reasonable grouting consolidation effect, moreover it is possible in this, as the foundation whether excavated in sentencing knowledge Tunnel；
4, in technical scheme of the present invention, use the first mini-valve tube that the stratum, both sides of the tunnel trunk of construction section is noted sulfur aluminum
Acid salt cement serosity, and use second mini-valve tube cementing serosity in stratum, top to the tunnel trunk of construction section, the first sleeve valve
Pipe and the second mini-valve tube are all unidirectional closing devices, serosity can be made to rush broken sleeve shell material press-in reinforcing body under pressure, compel
Make the intrapore water and air of reinforcing body be discharged, and it is carried out filling and parcel, so make the reinforcing body after reinforcing
Physical and mechanical properties be improved significantly, its shearing strength and stability are also greatly improved；It addition, stop grouting plug can also be by serosity
In the range of being limited to any layer, it is achieved in the purpose that reinforcing body segmentation is reinforced, moreover it is possible to realize after-teeming to reinforcing blind area；
5, in technical scheme of the present invention, the grouting pressure of note sulphate aluminium cement serosity and cement grout is all controlled
1.5 ~ 4.0MPa, so can effectively control range of grouting, moreover it is possible to avoid grout and grout leaking.
Accompanying drawing explanation
Fig. 1 is the process chart that in embodiment 1, ground, tomography tunnel table pack grouting strengthening method is passed through in shallow embedding；
Fig. 2 is to use shallow embedding to pass through ground, the tomography tunnel table pack grouting strengthening method reinforcing model to tunnel trunk in embodiment 1
Enclose schematic diagram；
Fig. 3 is the process chart that in embodiment 2, ground, tomography tunnel table pack grouting strengthening method is passed through in shallow embedding；
Labelling in figure: 1-above-ground route, 2-tunnel trunk, stratum, 3-both sides, stratum above 4-, 5-tunnel trunk excavation contour line.
Detailed description of the invention
Below in conjunction with the accompanying drawings and detailed description of the invention the present invention is described in further detail.But this should be interpreted as
The scope of the above-mentioned theme of the present invention is only limitted to below example, and all technology realized based on present invention belong to this
Bright scope.
Embodiment 1
Becoming honored guest is specially western high-speed railway arterial railway main line.West from the Leshan in Sichuan Province, through Sichuan Province's Yibin City, Yunnan
Province Weixin County, Bijie City, Guizhou Province, to the east of Guiyang, positive line length 515.02km.
Tunnel, chael-de-fer mountain rises and up to mileage is: D4K466+785～DK472+012, total length 5227m(open cut tunnel Han 52m), its
In, III grade of country rock 980m of full tunnel, IV grade of country rock 2075m, V grade of country rock 2120m, it is 80.3% that IV, V grade of country rock accounts for tunnel overall length.
By Geological Structure Effect, 4 tomography weakness band line influence length 1450m of Tunnel Passing, account for tunnel total length 27.7%.Wherein F2
Tomography (D4K467+150+650) moves towards 36o, it is inclined to east southeast, inclination angle 30o~40o；Tomography weakness bandwidth about 300m, circuit side
To affecting length 500m；Tomography 250m is passed through in barrel shallow embedding, and the minimum depth is 11.40m, and maximum buried depth is 16.88m.
The topography and geomorphology in tunnel, chael-de-fer mountain is that surface water easily collects area, barrel by tomography lithology be mainly fault gouge,
Local is fault breccia and cataclasite, rich water, belongs to typical case's tomography weakness band by geology.Because tomography lithology has resistance to compression shearing resistance
Intensity is low, meet water softens, without features such as self-stable ability, consolidation densification and rich waters, construction risk is very big.To this end, this tunnel is for becoming
One of 6 I level risk tunnels of your railway, are into one of 13 weight difficult point Tunnel Engineering your railway drafts.
But, the mountain tunnel that tomography weakness band is passed through in similar distance shallow embedding is few, is available for using for reference construction method
Seldom, according to tunnel, chael-de-fer mountain F2 tomography shallow embedding landform and announcement geological conditions, present embodiments provide a kind of shallow embedding and pass through disconnected
Ground, layer tunnel table pack grouting strengthening method.
First, Shallow Section tunnel trunk earth's surface to be onstructed is divided into multiple construction section, and multiple construction section is from rear to front
It is followed successively by the first construction section, the second construction section ..., the n-th construction section, wherein, n >=2, and n is natural number；Then, such as Fig. 2 institute
Show, then the stratum, both sides and stratum, top to the tunnel trunk of each construction section notes sulphate aluminium cement serosity and cement mortar respectively
Liquid, wherein, to the range of grouting on the stratum, both sides of the tunnel trunk of each construction section be: above tunnel bottom to tunnel vault
5m, each side 5m of the outer i.e. tunnel trunk of 5m(of excavation contour line), the stratum, top to the tunnel trunk of each construction section
Range of grouting be: below tunnel trunk vault, 6m is to 5m above vault, and reinforcing width is 14.22m.
Ground, tomography tunnel table pack grouting strengthening method is passed through in the shallow embedding that the present embodiment provides, as it is shown in figure 1, specifically include
Following steps:
Preliminary step A: preparation of construction, first, including energising, water flowing, path, smooth location, improves drainage system around place,
Build production, living facilities；Secondly, measure the position, hole in Pipe installing hole according to design document, and hole-specifically number, register hole
Mouth coordinate and elevation, calculate drilling depth and the reinforcement depth of pipeline installing hole；Again, design sulfur aluminate cement serosity and water
The match ratio of slurry liquid；Finally, it is ensured that the resource charge such as personnel, equipment, material put in place；
Preliminary step B: boring, uses geological drilling rig to hole by vertical construction section ground, position, said determination hole, it is thus achieved that pipeline
Installing hole；When boring, carrying out borehole log, whether essential record drilling process advances by leaps and bounds, the whether significant change of bit freezing, flushing liquor
Deng, the slip casting operation once walked for optimizing design and guidance provides foundation；
Step 1: use the first mini-valve tube that the stratum, both sides of the tunnel trunk of above-mentioned first construction section is noted sulphate aluminium cement slurry
Liquid；
Step 2: after the note sulphate aluminium cement serosity of the stratum, both sides of the tunnel trunk to the first construction section, then use the second sleeve
The valve pipe cementing serosity in stratum, top to the tunnel trunk of this first construction section, now, to the first construction section grouting and reinforcing knot
Bundle；
Step 3: use the first mini-valve tube that the stratum, both sides of the tunnel trunk of above-mentioned second construction section is noted sulphate aluminium cement slurry
Liquid；
Step 4: after the note sulphate aluminium cement serosity of the stratum, both sides of the tunnel trunk to the second construction section, then use the second sleeve
The valve pipe cementing serosity in stratum, top to the tunnel trunk of the second construction section, now, terminates the second construction section grouting and reinforcing；
……；
Step m: use the first mini-valve tube that the stratum, both sides of the tunnel trunk of above-mentioned n-th construction section is noted sulphate aluminium cement slurry
Liquid；
Step (m+1): after the note sulphate aluminium cement serosity of the stratum, both sides of the tunnel trunk to the n-th construction section, then use
Second mini-valve tube cementing serosity in stratum, top to the tunnel trunk of the n-th construction section, now, to the n-th construction section grouting and reinforcing
Terminate；
Now, grouting and reinforcing terminates；
Wherein, m >=3, and m is odd number.
In above-mentioned preliminary step A, when measuring position, hole according to design document, the both sides of the tunnel trunk of construction section are adjacent
Spacing between two Pipe installing holes is 1m*1m, and on tunnel trunk, the spacing between adjacent two Pipe installing holes is 2m*
2m。
In above-mentioned preliminary step B, hole by vertical construction section ground, position, said determination hole using geological drilling rig
Time, the deviation between Pipe installing hole and horizontal line be less than or equal to 5cm, and the error of the perpendicularity in Pipe installing hole less than or
Equal to 1/150, so ensure that and can reach highly consistent between all Pipe installing holes, and be easy to the peace of following mini-valve tube
Dress.In addition, when the geology of construction section is poor, pore-forming is difficult, mud off drilling and forming hole can be used；When in drilling process
When string wind occurs, interval boring or down tube timely to adjacent pore-forming note sleeve shell material sealing of hole can be used to solve；Finally, construction section
A diameter of 130mm in the aperture in the Pipe installing hole of tunnel trunk both sides, the Pipe installing hole on tunnel trunk a diameter of
110mm。
Before the note sulphate aluminium cement serosity of the stratum, both sides of the tunnel trunk to each construction section, it is required for slip casting
Zinc pipe is arranged in the first mini-valve tube and the second mini-valve tube, ready for subsequent job.To the first construction section grouting and reinforcing
After end, the slip casting zinc pipe of the slip casting zinc pipe of the first mini-valve tube and the second mini-valve tube need to be retreated from the first construction section and install to the
In the mini-valve tube that two construction sections are corresponding, to facilitate, the second construction section is carried out grouting and reinforcing；To the second construction section grouting and reinforcing
After end, also need to retreat the slip casting zinc of the first mini-valve tube and the slip casting zinc pipe of the second mini-valve tube to install to next construction section pair
In the mini-valve tube answered ..., until the slip casting zinc pipe of the first mini-valve tube and the slip casting zinc pipe of the second mini-valve tube are retreated and are installed to
In the mini-valve tube that n-th construction section is corresponding, so that the n-th construction section is carried out grouting and reinforcing；It follows that the shallow embedding that the present embodiment provides
Passing through ground, tomography tunnel table pack grouting strengthening method is to use segmentation, ecto-entad, retreat the mode of slip casting from bottom to top, one
Aspect, convenient operation, it is possible to for long distance construction so that ground, tomography tunnel table pack note is passed through in the shallow embedding that the present embodiment provides
Slurry reinforcement means is not limited by boundary of works area, and universality is good, on the other hand, additionally aids and strengthens the effect of the reinforcing to tunnel trunk
Really.
In the present embodiment, above-mentioned first mini-valve tube is the steel mini-valve tube of on-the-spot processing, uses steel mini-valve tube, it is possible to
Meet the feature of sulphate aluminium cement serosity quick setting early strength, it is achieved that the mesh that the stratum, both sides of tunnel trunk is reinforced in advance
's；It addition, depending on the tube coupling length of this first mini-valve tube is bored back of the body flying height by rig, its a diameter of 76mm, adapter sleeve pipe range
Degree is 15cm, and connects a diameter of 89mm of sleeve pipe；In addition, the slurry outlet of this first mini-valve tube is by with cross section cross cloth
Put, a diameter of 8mm of slurry outlet, and the spacing between adjacent two slurry outlets is 500mm, compared with prior art, such
It is designed with and helps under identical grouting pressure, accelerate injection speed and shorten the slip casting time；
Above-mentioned second mini-valve tube is PVC mini-valve tube, when by cement grout, uses PVC mini-valve tube as the second mini-valve tube, has
Help increase the permeability of cement grout, thus improve the Physical and mechanical properties on the stratum, top of tunnel trunk so that Tunnel
The stratum, top of body forms advance support system between the building enclosure formed by sulphate aluminium cement serosity and waterproof of man；Separately
Outward, a length of 2m of tube coupling of this second mini-valve tube, its a diameter of 50mm, and the slurry outlet of this second mini-valve tube is by with cross section cross
Shape is arranged, a diameter of 4-6mm of its slurry outlet, and the spacing between adjacent two slurry outlets is 330mm, with prior art phase
Ratio, such design also contributes to strengthen the penetrating power of serosity under identical grouting pressure.
When in above-mentioned Pipe installing hole, the first mini-valve tube and the second mini-valve tube are set, alter under serosity during for preventing slip casting,
Use cement grout to block the bottom mouth of pipe of the first mini-valve tube, and block a length of 10 ~ 20cm, use lower sealing cover closure second
The bottom mouth of pipe of mini-valve tube, its closure length is also 10 ~ 20cm；First mini-valve tube and the second mini-valve tube are being arranged at above-mentioned
After in Pipe installing hole, for preventing foreign material from entering in the first mini-valve tube and the second mini-valve tube, paper bag for cement is used to block the
The top mouth of pipe of one mini-valve tube, uses top cover labyrinth to block the top mouth of pipe of the second mini-valve tube；It addition, by the first mini-valve tube and
After second mini-valve tube is arranged in above-mentioned Pipe installing hole, the first mini-valve tube and the second mini-valve tube are exposed independent from ground 30 ~ 50cm.
After the first mini-valve tube and the second mini-valve tube are arranged in corresponding Pipe installing hole, and to each construction section
Tunnel trunk stratum, both sides note sulphate aluminium cement serosity before, be employed to lead slurry pipe to the pipe on corresponding construction section
Road installing hole annulus note sleeve shell material respectively and between the first mini-valve tube and the second mini-valve tube, as it is shown in figure 1, specifically wrap
Include: in above-mentioned steps 1, before stratum, the both sides note sulphate aluminium cement serosity of the tunnel trunk of the first construction section, utilize
Lead slurry pipe to the annulus respectively and between the first mini-valve tube and the second mini-valve tube of the Pipe installing hole on this first construction section
Note sleeve shell material；In above-mentioned steps 3, the stratum, both sides of the tunnel trunk to the second construction section note sulphate aluminium cement serosity it
Before, utilize and lead slurry pipe to the ring respectively and between the first mini-valve tube and the second mini-valve tube of the Pipe installing hole on this second construction section
Sleeve shell material is noted in shape space；In above-mentioned steps m, note aluminium sulfate water on the stratum, both sides of the tunnel barrel to the n-th construction section
Before slurry liquid, utilize lead slurry pipe to the Pipe installing hole on this n-th construction section respectively with the first mini-valve tube and the second mini-valve tube
Between annulus in note sleeve shell material.In the Pipe installing hole of each construction section respectively with the first mini-valve tube and the second mini-valve tube it
Between annulus in note sleeve shell material after, sleeve shell material will form the protective layer with some strength around mini-valve tube, can
Prevent serosity from fleeing hither and thither when slip casting, stratum can be racked as required by serosity when slip casting again, play layering, segmenting slip casting
Purpose；It addition, note in the annulus respectively and between the first mini-valve tube and the second mini-valve tube of the Pipe installing hole of construction section
Sleeve shell material, moreover it is possible to prevent mini-valve tube from deforming during slip casting, conjugate or damaged, also can guarantee that injection slurry passes through.Therefore,
To noting sleeve shell material, energy in the annulus respectively and between the first mini-valve tube and the second mini-valve tube of the Pipe installing hole on construction section
Enough ensure reasonable grouting consolidation effect.
Slurry pipe is led to the Pipe installing hole on the first construction section, the second construction section ..., the n-th construction section respectively in utilization
And after noting sleeve shell material in the annulus between above-mentioned first mini-valve tube and the second mini-valve tube, the gelling time of sleeve shell material is controlled
At 10 ~ 14h, if gelling time is less than 10h, then can damage coagulation result and the intensity of sleeve shell material, also influence whether follow-up note
The effect that slurry is reinforced, if gelling time is more than 14h, then can cause temporal waste, is unfavorable for shortening the construction period；Separately
Outward, to be also 0.3 ~ 0.5MPa by the strength control of sleeve shell material after gelling, to ensure the effect of follow-up grouting and reinforcing.
It addition, after the annulus that sleeve shell material fills between Pipe installing hole and above-mentioned mini-valve tube, be also performed to sealing
Operation, particularly as follows: use paper bag for cement blocking pipe installing hole ring respectively and between above-mentioned first mini-valve tube and the second mini-valve tube
The top outlet in shape space, blocks a length of 30 ~ 40cm, so can play the effect returning slurry phenomenon when preventing slip casting；
In order to return slurry when avoiding preventing slip casting further, with paper bag for cement blocking pipe installing hole respectively with above-mentioned first sleeve valve
Between pipe and the second mini-valve tube after the top outlet of annulus, then use cement grout blocking pipe installing hole respectively with first
Between mini-valve tube and the second mini-valve tube, the top outlet of annulus, blocks a length of 20 ~ 30cm.
Before the note sulphate aluminium cement serosity of the stratum, both sides of the tunnel trunk to each construction section, the most first open first
The plug of the mini-valve tube top mouth of pipe, the bottom of lower adjutage to the first mini-valve tube is to carry out the foreign material in the first mini-valve tube pipe
Rinse, to facilitate slip casting；After cleaning terminates, transfer slip casting zinc pipe before, the shape of the slurry casting machine of slip casting zinc pipe front end will be checked
State is the best, whether slip casting zinc pipe pipeline has blocking, the connection on each pipe joint road is the best, smooth to ensure that slip casting works
Carry out.
Above the tunnel trunk to each construction section before stratum cementing serosity, slip casting for convenience, also will
First open the plug of the second mini-valve tube top mouth of pipe, and use water pipe that the foreign material in the second mini-valve tube pipe are rinsed；?
After cleaning terminates, transfer slip casting zinc pipe before, also will check whether slurry casting machine state whether good, slip casting zinc pipe pipeline has stifled
The connection on plug and each pipe joint road is the best, and what beneficially slip casting worked is smoothed out.
In the present embodiment, sulphate aluminium cement serosity is noted on the stratum, both sides of the tunnel trunk of above-mentioned each construction section
Grouting pressure all controls at 1.5 ~ 4.0MPa, so can effectively control range of grouting, moreover it is possible to avoid grout and grout leaking, specifically
For: control to be 1.5 ~ 2.5MPa by the grouting pressure being positioned at the region of more than tunnel vault on the stratum, both sides of tunnel trunk, as
If grouting pressure is less than 1.5MPa, grout spreading range can be made can not to meet the requirement of design radial, not reach reinforcing scope,
Affect consolidation effect, if grouting pressure is more than 2.5 MPa, can cause going here and there on serosity, beyond reinforcing scope, cause serosity wave
Take.It addition, control to be 2.5 ~ 4.0MPa by the grouting pressure being positioned at vault area below on the stratum, both sides of tunnel trunk, as
If grouting pressure is less than 2.5MPa, grout spreading range also can be made can not to meet the requirement of design radial, do not reach reinforcing model
Enclose, affect consolidation effect, if grouting pressure is more than 4.0 MPa, will also result in serosity waste.
The grouting pressure of stratum, the top cementing serosity of the tunnel trunk of above-mentioned each construction section is controlled 1.5 ~
4.0MPa, ibid, the most also can play the effect effectively controlling range of grouting, avoiding grout and grout leaking, particularly as follows: by Tunnel
The grouting pressure in the region being positioned at more than tunnel vault on the stratum, top of body controls to be 1.5 ~ 2.5MPa, same as above, if
Grouting pressure is less than 1.5MPa, grout spreading range also can be made can not to meet the requirement of design radial, do not reach reinforcing scope,
Affect consolidation effect, if grouting pressure is more than 2.5 MPa, also results in and go here and there on serosity, beyond reinforcing scope, cause serosity wave
Take.It addition, control to be 2.5 ~ 4.0MPa by the grouting pressure being positioned at vault area below on the stratum, top of tunnel trunk, with
Upper described, if grouting pressure is less than 2.5MPa, grout spreading range can be made can not to meet the requirement of design radial, do not reach
Reinforcing scope, affects consolidation effect, if grouting pressure is more than 4.0 MPa, will also result in serosity waste.
In the present embodiment, sulphate aluminium cement serosity is noted on the stratum, both sides of the tunnel trunk to above-mentioned each construction section
After, because aluminium sulfate has the feature of quick setting early strength, after sulphate aluminium cement serosity filling formation pore under pressure
Meeting rapid solidification, cuts off and plugs water stream channel, also making the Physical and mechanical properties on the stratum, both sides of tunnel trunk be changed
Kind, and improve and between stratum, both sides and mini-valve tube after Physical and mechanical properties, define effective building enclosure and waterproof of man,
Penetrating power also by the stratum, both sides improving tunnel trunk achieves the purpose of strengthening stratum and impervious leakage-stopping；To above-mentioned
After stratum, the top cementing serosity of the tunnel trunk of each construction section, the Physical and mechanical properties on the stratum, top of tunnel trunk
Also improved, and between above-mentioned building enclosure, formed effective leading pre-supporting system.
Embodiment 2
The present embodiment also provides a kind of shallow embedding and passes through ground, tomography tunnel table pack grouting strengthening method, and tomography tunnel is passed through in this shallow embedding
It is general that ground, tomography tunnel table pack grouting strengthening method is passed through in the shallow embedding that genuine table pack grouting strengthening method and embodiment 1 provide
Identical, differing only in therebetween:
As it is shown on figure 3, in above-mentioned steps 2, above the tunnel trunk to the first construction section after stratum cementing serosity, carry out
Slip casting for the first time is verified, to sentence knowledge consolidation effect, if consolidation effect reaches requirement, then to the first construction section grouting and reinforcing knot
Bundle, otherwise, returns step 1 or step 2: if particularly as follows: the reinforcing to the stratum, both sides of the tunnel trunk of the first construction section is imitated
Fruit does not meet requirement, then return above-mentioned steps 1 grouting and reinforcing again, if the ground, top of the tunnel trunk to the first construction section
The consolidation effect of layer does not meet requirement, then return above-mentioned steps 2 grouting and reinforcing again, until the Tunnel to the first construction section
The stratum, both sides of body and the consolidation effect on stratum, top all meet requirement, the second construction section could be carried out grouting and reinforcing, so
Can guarantee that reasonable grouting consolidation effect；
In above-mentioned steps 4, above the tunnel trunk to the second construction section after stratum cementing serosity, carry out second time slip casting
Checking, to sentence knowledge consolidation effect, if consolidation effect reaches requirement, then terminates the second construction section grouting and reinforcing, otherwise, returns
Step 3 or step 4, if particularly as follows: meeting the consolidation effect on the stratum, both sides of the tunnel trunk of the second construction section and want
Ask, then return above-mentioned steps 3 grouting and reinforcing again, if the consolidation effect on the stratum, top to the tunnel trunk of the second construction section
Do not meet requirement, then return above-mentioned steps 4 grouting and reinforcing again, until the stratum, both sides of the tunnel trunk to the second construction section
All meet requirement with the consolidation effect on stratum, top, next construction section could be carried out grouting and reinforcing, so can guarantee that and compare
Good grouting consolidation effect；
In above-mentioned steps (m+1), above the tunnel trunk to the n-th construction section after stratum cementing serosity, carry out n-th note
Slurry checking, to sentence knowledge consolidation effect, if consolidation effect reaches requirement, then terminates the n-th construction section grouting and reinforcing, otherwise, returns
Return step m or step (m+1), if particularly as follows: it is not full to the consolidation effect on the stratum, both sides of the tunnel trunk of the n-th construction section
Foot requirement, then return above-mentioned steps m grouting and reinforcing again, if the reinforcing on the stratum, top to the tunnel trunk of the second construction section
Effect does not meet requirement, then return above-mentioned steps (m+1) grouting and reinforcing again, until to the tunnel trunk of the n-th construction section
The consolidation effect on stratum, both sides and stratum, top all meets requirement, could terminate the grouting and reinforcing to the n-th construction section, so can protect
Demonstrate,prove reasonable grouting consolidation effect.
In the present embodiment, n >=2, and n is natural number；M >=3, and m is odd number.
After each construction section grouting and reinforcing is terminated, it is intended to carry out slip casting checking, i.e. according to actual (design) grouting amount
And the distribution characteristics of serosity during slip casting, slip casting weak part (blind area) that may be present on each construction section is had for
Property inspection hole is set, by the seriality checking the core-taking rate in hole and core sample is carried out slip casting effect checking such that it is able to sentence
Know whether the grouting and reinforcing to each construction section meets the requirement of design verification index, whether there is blind area, can not only ensure to compare
Preferably grouting consolidation effect, moreover it is possible in this, as the foundation whether excavated in sentencing knowledge Tunnel.
In the present embodiment, on each construction section, the 3% of the quantity that quantity is Pipe installing hole checking hole of setting ~
5%, core-taking rate is more than or equal to 70%.
Claims (10)
1. ground, tomography tunnel table pack grouting strengthening method is passed through in a shallow embedding, it is characterised in that by Shallow Section tunnel to be onstructed
Barrel earth's surface, road is divided into multiple construction section, and sulfur is noted on the stratum, both sides and stratum, top to the tunnel trunk of described construction section respectively
Aluminate cement serosity and cement grout.
Ground, tomography tunnel table pack grouting strengthening method is passed through in shallow embedding the most according to claim 1, it is characterised in that multiple
Described construction section is followed successively by the first construction section, the second construction section ..., the n-th construction section from rear to front；
Wherein, n >=2, and n is natural number.
Ground, tomography tunnel table pack grouting strengthening method is passed through in shallow embedding the most according to claim 2, it is characterised in that include
Following steps:
Step 1: stratum, the both sides note sulphate aluminium cement serosity to the tunnel trunk of described first construction section；
Step 2: stratum, the top cementing serosity to the tunnel trunk of described first construction section, now, to described first construction
Section grouting and reinforcing terminates；
Step 3: stratum, the both sides note sulphate aluminium cement serosity to the tunnel trunk of described second construction section；
Step 4: stratum, the top cementing serosity to the tunnel trunk of described second construction section, now, to described second construction
Section grouting and reinforcing terminates；
……；
Step m: stratum, the both sides note sulphate aluminium cement serosity to the tunnel trunk of described n-th construction section；
Step (m+1): stratum, the top cementing serosity to the tunnel trunk of described n-th construction section, now, executes described n-th
Workshop section's grouting and reinforcing terminates；
Wherein, m >=3, and m is odd number.
Ground, tomography tunnel table pack grouting strengthening method is passed through in shallow embedding the most according to claim 3, it is characterised in that above-mentioned
In step 2, above the tunnel trunk to described first construction section after stratum cementing serosity, carry out slip casting for the first time and test
Card, to sentence knowledge consolidation effect, if consolidation effect reaches requirement, then terminates described first construction section grouting and reinforcing, otherwise, returns
Return step 1 or step 2.
Ground, tomography tunnel table pack grouting strengthening method is passed through in shallow embedding the most according to claim 3, it is characterised in that above-mentioned
In step 4, above the tunnel trunk to described second construction section after stratum cementing serosity, carry out second time slip casting and test
Card, to sentence knowledge consolidation effect, if consolidation effect reaches requirement, then terminates described second construction section grouting and reinforcing, otherwise, returns
Return step 3 or step 4.
Ground, tomography tunnel table pack grouting strengthening method is passed through in shallow embedding the most according to claim 3, it is characterised in that above-mentioned
In step (m+1), above the tunnel trunk to described n-th construction section after stratum cementing serosity, carry out n-th slip casting and test
Card, to sentence knowledge consolidation effect, if consolidation effect reaches requirement, then terminates described n-th construction section grouting and reinforcing, otherwise, returns
Return step m or step (m+1).
Ground, tomography tunnel table pack grouting strengthening method is passed through in shallow embedding the most according to claim 1, it is characterised in that use
Sulphate aluminium cement serosity is noted in the stratum, both sides of the tunnel trunk of described construction section by the first mini-valve tube, and uses the second mini-valve tube
Stratum, top cementing serosity to the tunnel trunk of described construction section.
Ground, tomography tunnel table pack grouting strengthening method is passed through in shallow embedding the most according to claim 7, it is characterised in that right
Before stratum, the both sides note sulphate aluminium cement serosity of the tunnel trunk of described construction section, to the Pipe installing on described construction section
Hole annulus note sleeve shell material respectively and between described first mini-valve tube and the second mini-valve tube.
Ground, tomography tunnel table pack grouting strengthening method is passed through in shallow embedding the most according to claim 1, it is characterised in that to institute
The grouting pressure of stratum, the both sides note sulphate aluminium cement serosity stating the tunnel trunk of construction section controls at 1.5 ~ 4.0MPa.
Ground, tomography tunnel table pack grouting strengthening method is passed through in shallow embedding the most according to claim 1, it is characterised in that right
The grouting pressure of stratum, the top cementing serosity of the tunnel trunk of described construction section controls at 1.5 ~ 4.0MPa.
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| CN107762533A (en) * | 2017-10-18 | 2018-03-06 | 中交公局桥隧工程有限公司 | A kind of front pre-grouting method of high-pressure water-enriched weak surrounding rock mountain tunnel |
| CN108222948A (en) * | 2017-12-29 | 2018-06-29 | 中铁二局第工程有限公司 | A kind of traversing shallow-buried Faults in Tunnels Construction of Transition Section method |
| CN109209448A (en) * | 2018-08-28 | 2019-01-15 | 北京瑞威世纪铁道工程有限公司 | Tunnel surface grouting blocks water construction method |
| CN109236328A (en) * | 2018-10-30 | 2019-01-18 | 广东省交通规划设计研究院股份有限公司 | The reinforcement means of shallow embedding mountain tunnel suitable for rich water soft layer |
| CN110630290A (en) * | 2019-09-24 | 2019-12-31 | 中水北方勘测设计研究有限责任公司 | Method for treating large amount of water gushing of tunnel in river-crossing permeable fault |
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| CN109209448B (en) * | 2018-08-28 | 2024-05-31 | 北京瑞威世纪铁道工程有限公司 | Tunnel earth surface grouting water-blocking construction method |
| CN109236328A (en) * | 2018-10-30 | 2019-01-18 | 广东省交通规划设计研究院股份有限公司 | The reinforcement means of shallow embedding mountain tunnel suitable for rich water soft layer |
| CN110630290A (en) * | 2019-09-24 | 2019-12-31 | 中水北方勘测设计研究有限责任公司 | Method for treating large amount of water gushing of tunnel in river-crossing permeable fault |
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