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 PDF

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Publication number
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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China
Prior art keywords
construction section
tunnel
stratum
grouting
serosity
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Inventor
何复生
耿开亮
杨寰
左小勇
罗军
向学文
刘衍君
万朝鼎
罗飚
钟万波
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China Railway No 2 Engineering Group Co Ltd
China Railway Erju 1st Engineering Co Ltd
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China Railway No 2 Engineering Group Co Ltd
China Railway Erju 1st Engineering Co Ltd
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Priority to CN201610459427.7A priority Critical patent/CN106049418A/en
Publication of CN106049418A publication Critical patent/CN106049418A/en
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    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/001Improving soil or rock, e.g. by freezing; Injections
    • E21D9/002Injection methods characterised by the chemical composition used
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/12Consolidating by placing solidifying or pore-filling substances in the soil

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  • 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

Ground, tomography tunnel table pack grouting strengthening method is passed through in a kind of shallow embedding
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.
CN201610459427.7A 2016-06-22 2016-06-22 Combined grouting reinforcement method for tunnel surface in shallow buried traversing faultage Pending CN106049418A (en)

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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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Application publication date: 20161026